* [PATCH v4 01/24] elf, uapi: Add a header for relocation constants
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 02/24] x86/elf, um/x86/elf: Move relocation constants to UAPI Thomas Weißschuh
` (24 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
While the numeric constants for relocations are architecture specific,
it is still useful to get access to them from other architectures.
Also the definitions are useful for userspace in general.
For example tools processing elf files during a kernel cross-compilation
can make use of them.
Introduce a dedicated header for them, similar to the elf-em.h header.
For now the header is empty but it will be filled step by step in
upcomming commits.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
include/uapi/linux/elf-r.h | 5 +++++
include/uapi/linux/elf.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
new file mode 100644
index 0000000000000000000000000000000000000000..2c382c8a4807f394a3ccabf39a81e9e9b6f7ea45
--- /dev/null
+++ b/include/uapi/linux/elf-r.h
@@ -0,0 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_LINUX_ELF_R_H
+#define _UAPI_LINUX_ELF_R_H
+
+#endif /* _UAPI_LINUX_ELF_R_H */
diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index 819ded2d39de2bfcfca3c25a52c8b8cd51a01c12..3d18543d5460a757f0578afe5d487233ffaa3c57 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -4,6 +4,7 @@
#include <linux/types.h>
#include <linux/elf-em.h>
+#include <linux/elf-r.h>
/* 32-bit ELF base types. */
typedef __u32 Elf32_Addr;
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 02/24] x86/elf, um/x86/elf: Move relocation constants to UAPI
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 01/24] elf, uapi: Add a header for relocation constants Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 03/24] ARM: elf: " Thomas Weißschuh
` (23 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These constants are useful for cross-platform userspace, for example to
process ELF files during kernel cross-compilation.
Move them from the kernel-private architecture-specific header to the UAPI.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/x86/include/asm/elf.h | 34 ----------------------------------
arch/x86/um/asm/elf.h | 33 ---------------------------------
include/uapi/linux/elf-r.h | 34 ++++++++++++++++++++++++++++++++++
3 files changed, 34 insertions(+), 67 deletions(-)
diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index 6c8fdc96be7e8bd33919d9b56ae8a8a68f4b0c3f..a2538561a84b8dae0479c43238f6f297fe88924b 100644
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -22,19 +22,6 @@ typedef struct user_i387_struct elf_fpregset_t;
#ifdef __i386__
-#define R_386_NONE 0
-#define R_386_32 1
-#define R_386_PC32 2
-#define R_386_GOT32 3
-#define R_386_PLT32 4
-#define R_386_COPY 5
-#define R_386_GLOB_DAT 6
-#define R_386_JMP_SLOT 7
-#define R_386_RELATIVE 8
-#define R_386_GOTOFF 9
-#define R_386_GOTPC 10
-#define R_386_NUM 11
-
/*
* These are used to set parameters in the core dumps.
*/
@@ -44,27 +31,6 @@ typedef struct user_i387_struct elf_fpregset_t;
#else
-/* x86-64 relocation types */
-#define R_X86_64_NONE 0 /* No reloc */
-#define R_X86_64_64 1 /* Direct 64 bit */
-#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
-#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
-#define R_X86_64_PLT32 4 /* 32 bit PLT address */
-#define R_X86_64_COPY 5 /* Copy symbol at runtime */
-#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
-#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
-#define R_X86_64_RELATIVE 8 /* Adjust by program base */
-#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative offset to GOT */
-#define R_X86_64_GOTPCRELX 41
-#define R_X86_64_REX_GOTPCRELX 42
-#define R_X86_64_32 10 /* Direct 32 bit zero extended */
-#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
-#define R_X86_64_16 12 /* Direct 16 bit zero extended */
-#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
-#define R_X86_64_8 14 /* Direct 8 bit sign extended */
-#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
-#define R_X86_64_PC64 24 /* Place relative 64-bit signed */
-
/*
* These are used to set parameters in the core dumps.
*/
diff --git a/arch/x86/um/asm/elf.h b/arch/x86/um/asm/elf.h
index 62ed5d68a9788ffbf9dd0b4ebbe2caad4ac7a7c6..2e79193f396cda854ab4f17af2cd5b15c1e078cd 100644
--- a/arch/x86/um/asm/elf.h
+++ b/arch/x86/um/asm/elf.h
@@ -12,19 +12,6 @@
#ifdef CONFIG_X86_32
-#define R_386_NONE 0
-#define R_386_32 1
-#define R_386_PC32 2
-#define R_386_GOT32 3
-#define R_386_PLT32 4
-#define R_386_COPY 5
-#define R_386_GLOB_DAT 6
-#define R_386_JMP_SLOT 7
-#define R_386_RELATIVE 8
-#define R_386_GOTOFF 9
-#define R_386_GOTPC 10
-#define R_386_NUM 11
-
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
@@ -100,26 +87,6 @@ do { \
#else
-/* x86-64 relocation types, taken from asm-x86_64/elf.h */
-#define R_X86_64_NONE 0 /* No reloc */
-#define R_X86_64_64 1 /* Direct 64 bit */
-#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
-#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
-#define R_X86_64_PLT32 4 /* 32 bit PLT address */
-#define R_X86_64_COPY 5 /* Copy symbol at runtime */
-#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
-#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
-#define R_X86_64_RELATIVE 8 /* Adjust by program base */
-#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
- offset to GOT */
-#define R_X86_64_32 10 /* Direct 32 bit zero extended */
-#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
-#define R_X86_64_16 12 /* Direct 16 bit zero extended */
-#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
-#define R_X86_64_8 14 /* Direct 8 bit sign extended */
-#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
-#define R_X86_64_PC64 24 /* Place relative 64-bit signed */
-
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index 2c382c8a4807f394a3ccabf39a81e9e9b6f7ea45..45a160ecf40570f3ac916344be363d7e74908ea6 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -2,4 +2,38 @@
#ifndef _UAPI_LINUX_ELF_R_H
#define _UAPI_LINUX_ELF_R_H
+/* i386 relocation types */
+#define R_386_NONE 0
+#define R_386_32 1
+#define R_386_PC32 2
+#define R_386_GOT32 3
+#define R_386_PLT32 4
+#define R_386_COPY 5
+#define R_386_GLOB_DAT 6
+#define R_386_JMP_SLOT 7
+#define R_386_RELATIVE 8
+#define R_386_GOTOFF 9
+#define R_386_GOTPC 10
+#define R_386_NUM 11
+
+/* x86-64 relocation types */
+#define R_X86_64_NONE 0 /* No reloc */
+#define R_X86_64_64 1 /* Direct 64 bit */
+#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
+#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
+#define R_X86_64_PLT32 4 /* 32 bit PLT address */
+#define R_X86_64_COPY 5 /* Copy symbol at runtime */
+#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
+#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
+#define R_X86_64_RELATIVE 8 /* Adjust by program base */
+#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
+ offset to GOT */
+#define R_X86_64_32 10 /* Direct 32 bit zero extended */
+#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
+#define R_X86_64_16 12 /* Direct 16 bit zero extended */
+#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
+#define R_X86_64_8 14 /* Direct 8 bit sign extended */
+#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
+#define R_X86_64_PC64 24 /* Place relative 64-bit signed */
+
#endif /* _UAPI_LINUX_ELF_R_H */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 03/24] ARM: elf: Move relocation constants to UAPI
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 01/24] elf, uapi: Add a header for relocation constants Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 02/24] x86/elf, um/x86/elf: Move relocation constants to UAPI Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 04/24] arm64: " Thomas Weißschuh
` (22 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These constants are useful for cross-platform userspace, for example to
process ELF files during kernel cross-compilation.
Move them from the kernel-private architecture-specific header to the UAPI.
One arm64 header is also changed as it duplicates an arm definition.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/arm/include/asm/elf.h | 24 ------------------------
arch/arm64/include/asm/elf.h | 1 -
include/uapi/linux/elf-r.h | 25 +++++++++++++++++++++++++
3 files changed, 25 insertions(+), 25 deletions(-)
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h
index 9f21e170320fc57f1dc21a33d637bcfd3d1d3917..ec2d416baa9f7ef4b860c4a18b2e2bf2f05e4a9d 100644
--- a/arch/arm/include/asm/elf.h
+++ b/arch/arm/include/asm/elf.h
@@ -47,30 +47,6 @@ typedef struct user_fp elf_fpregset_t;
#define EF_ARM_HASENTRY 0x00000002 /* All */
#define EF_ARM_RELEXEC 0x00000001 /* All */
-#define R_ARM_NONE 0
-#define R_ARM_PC24 1
-#define R_ARM_ABS32 2
-#define R_ARM_REL32 3
-#define R_ARM_CALL 28
-#define R_ARM_JUMP24 29
-#define R_ARM_TARGET1 38
-#define R_ARM_V4BX 40
-#define R_ARM_PREL31 42
-#define R_ARM_MOVW_ABS_NC 43
-#define R_ARM_MOVT_ABS 44
-#define R_ARM_MOVW_PREL_NC 45
-#define R_ARM_MOVT_PREL 46
-#define R_ARM_ALU_PC_G0_NC 57
-#define R_ARM_ALU_PC_G1_NC 59
-#define R_ARM_LDR_PC_G2 63
-
-#define R_ARM_THM_CALL 10
-#define R_ARM_THM_JUMP24 30
-#define R_ARM_THM_MOVW_ABS_NC 47
-#define R_ARM_THM_MOVT_ABS 48
-#define R_ARM_THM_MOVW_PREL_NC 49
-#define R_ARM_THM_MOVT_PREL 50
-
/*
* These are used to set parameters in the core dumps.
*/
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index 3f93f4eef9530a7b5bc966bf4a16d83093a016ee..8efcfe7efe0c70c59b9b81f93ac9c1442bc7656a 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -18,7 +18,6 @@
*/
/* Miscellaneous. */
-#define R_ARM_NONE 0
#define R_AARCH64_NONE 256
/* Data. */
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index 45a160ecf40570f3ac916344be363d7e74908ea6..001884641e7703146f91e2dd96fb5a2bbfc7a324 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -36,4 +36,29 @@
#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
#define R_X86_64_PC64 24 /* Place relative 64-bit signed */
+/* arm relocation types */
+#define R_ARM_NONE 0
+#define R_ARM_PC24 1
+#define R_ARM_ABS32 2
+#define R_ARM_REL32 3
+#define R_ARM_CALL 28
+#define R_ARM_JUMP24 29
+#define R_ARM_TARGET1 38
+#define R_ARM_V4BX 40
+#define R_ARM_PREL31 42
+#define R_ARM_MOVW_ABS_NC 43
+#define R_ARM_MOVT_ABS 44
+#define R_ARM_MOVW_PREL_NC 45
+#define R_ARM_MOVT_PREL 46
+#define R_ARM_ALU_PC_G0_NC 57
+#define R_ARM_ALU_PC_G1_NC 59
+#define R_ARM_LDR_PC_G2 63
+
+#define R_ARM_THM_CALL 10
+#define R_ARM_THM_JUMP24 30
+#define R_ARM_THM_MOVW_ABS_NC 47
+#define R_ARM_THM_MOVT_ABS 48
+#define R_ARM_THM_MOVW_PREL_NC 49
+#define R_ARM_THM_MOVT_PREL 50
+
#endif /* _UAPI_LINUX_ELF_R_H */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 04/24] arm64: elf: Move relocation constants to UAPI
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (2 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 03/24] ARM: elf: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 05/24] powerpc/elf: " Thomas Weißschuh
` (21 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These constants are useful for cross-platform userspace, for example to
process ELF files during kernel cross-compilation.
Move them from the kernel-private architecture-specific header to the UAPI.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/arm64/include/asm/elf.h | 54 --------------------------------------------
include/uapi/linux/elf-r.h | 52 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 52 insertions(+), 54 deletions(-)
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index 8efcfe7efe0c70c59b9b81f93ac9c1442bc7656a..a14b88fb485e60f89332f0c6b58ed929eb6600b6 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -13,60 +13,6 @@
#include <asm/ptrace.h>
#include <asm/user.h>
-/*
- * AArch64 static relocation types.
- */
-
-/* Miscellaneous. */
-#define R_AARCH64_NONE 256
-
-/* Data. */
-#define R_AARCH64_ABS64 257
-#define R_AARCH64_ABS32 258
-#define R_AARCH64_ABS16 259
-#define R_AARCH64_PREL64 260
-#define R_AARCH64_PREL32 261
-#define R_AARCH64_PREL16 262
-
-/* Instructions. */
-#define R_AARCH64_MOVW_UABS_G0 263
-#define R_AARCH64_MOVW_UABS_G0_NC 264
-#define R_AARCH64_MOVW_UABS_G1 265
-#define R_AARCH64_MOVW_UABS_G1_NC 266
-#define R_AARCH64_MOVW_UABS_G2 267
-#define R_AARCH64_MOVW_UABS_G2_NC 268
-#define R_AARCH64_MOVW_UABS_G3 269
-
-#define R_AARCH64_MOVW_SABS_G0 270
-#define R_AARCH64_MOVW_SABS_G1 271
-#define R_AARCH64_MOVW_SABS_G2 272
-
-#define R_AARCH64_LD_PREL_LO19 273
-#define R_AARCH64_ADR_PREL_LO21 274
-#define R_AARCH64_ADR_PREL_PG_HI21 275
-#define R_AARCH64_ADR_PREL_PG_HI21_NC 276
-#define R_AARCH64_ADD_ABS_LO12_NC 277
-#define R_AARCH64_LDST8_ABS_LO12_NC 278
-
-#define R_AARCH64_TSTBR14 279
-#define R_AARCH64_CONDBR19 280
-#define R_AARCH64_JUMP26 282
-#define R_AARCH64_CALL26 283
-#define R_AARCH64_LDST16_ABS_LO12_NC 284
-#define R_AARCH64_LDST32_ABS_LO12_NC 285
-#define R_AARCH64_LDST64_ABS_LO12_NC 286
-#define R_AARCH64_LDST128_ABS_LO12_NC 299
-
-#define R_AARCH64_MOVW_PREL_G0 287
-#define R_AARCH64_MOVW_PREL_G0_NC 288
-#define R_AARCH64_MOVW_PREL_G1 289
-#define R_AARCH64_MOVW_PREL_G1_NC 290
-#define R_AARCH64_MOVW_PREL_G2 291
-#define R_AARCH64_MOVW_PREL_G2_NC 292
-#define R_AARCH64_MOVW_PREL_G3 293
-
-#define R_AARCH64_RELATIVE 1027
-
/*
* These are used to set parameters in the core dumps.
*/
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index 001884641e7703146f91e2dd96fb5a2bbfc7a324..cf931fc05afa1825aa9737a4e6259ec0da678d3a 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -61,4 +61,56 @@
#define R_ARM_THM_MOVW_PREL_NC 49
#define R_ARM_THM_MOVT_PREL 50
+/* AArch64 static relocation types */
+
+/* Miscellaneous. */
+#define R_AARCH64_NONE 256
+
+/* Data. */
+#define R_AARCH64_ABS64 257
+#define R_AARCH64_ABS32 258
+#define R_AARCH64_ABS16 259
+#define R_AARCH64_PREL64 260
+#define R_AARCH64_PREL32 261
+#define R_AARCH64_PREL16 262
+
+/* Instructions. */
+#define R_AARCH64_MOVW_UABS_G0 263
+#define R_AARCH64_MOVW_UABS_G0_NC 264
+#define R_AARCH64_MOVW_UABS_G1 265
+#define R_AARCH64_MOVW_UABS_G1_NC 266
+#define R_AARCH64_MOVW_UABS_G2 267
+#define R_AARCH64_MOVW_UABS_G2_NC 268
+#define R_AARCH64_MOVW_UABS_G3 269
+
+#define R_AARCH64_MOVW_SABS_G0 270
+#define R_AARCH64_MOVW_SABS_G1 271
+#define R_AARCH64_MOVW_SABS_G2 272
+
+#define R_AARCH64_LD_PREL_LO19 273
+#define R_AARCH64_ADR_PREL_LO21 274
+#define R_AARCH64_ADR_PREL_PG_HI21 275
+#define R_AARCH64_ADR_PREL_PG_HI21_NC 276
+#define R_AARCH64_ADD_ABS_LO12_NC 277
+#define R_AARCH64_LDST8_ABS_LO12_NC 278
+
+#define R_AARCH64_TSTBR14 279
+#define R_AARCH64_CONDBR19 280
+#define R_AARCH64_JUMP26 282
+#define R_AARCH64_CALL26 283
+#define R_AARCH64_LDST16_ABS_LO12_NC 284
+#define R_AARCH64_LDST32_ABS_LO12_NC 285
+#define R_AARCH64_LDST64_ABS_LO12_NC 286
+#define R_AARCH64_LDST128_ABS_LO12_NC 299
+
+#define R_AARCH64_MOVW_PREL_G0 287
+#define R_AARCH64_MOVW_PREL_G0_NC 288
+#define R_AARCH64_MOVW_PREL_G1 289
+#define R_AARCH64_MOVW_PREL_G1_NC 290
+#define R_AARCH64_MOVW_PREL_G2 291
+#define R_AARCH64_MOVW_PREL_G2_NC 292
+#define R_AARCH64_MOVW_PREL_G3 293
+
+#define R_AARCH64_RELATIVE 1027
+
#endif /* _UAPI_LINUX_ELF_R_H */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 05/24] powerpc/elf: Move relocation constants to UAPI
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (3 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 04/24] arm64: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 06/24] riscv: elf: " Thomas Weißschuh
` (20 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These constants are useful for cross-platform userspace, for example to
process ELF files during kernel cross-compilation.
Move them from the kernel-private architecture-specific header to the UAPI.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/powerpc/include/uapi/asm/elf.h | 201 ------------------------------------
include/uapi/linux/elf-r.h | 201 ++++++++++++++++++++++++++++++++++++
2 files changed, 201 insertions(+), 201 deletions(-)
diff --git a/arch/powerpc/include/uapi/asm/elf.h b/arch/powerpc/include/uapi/asm/elf.h
index a5377f494fa316f62821a27ce1c32fede4c0507d..aba921b8249a2654be2a78c879c9ef236a017b57 100644
--- a/arch/powerpc/include/uapi/asm/elf.h
+++ b/arch/powerpc/include/uapi/asm/elf.h
@@ -17,78 +17,6 @@
#include <asm/cputable.h>
#include <asm/auxvec.h>
-/* PowerPC relocations defined by the ABIs */
-#define R_PPC_NONE 0
-#define R_PPC_ADDR32 1 /* 32bit absolute address */
-#define R_PPC_ADDR24 2 /* 26bit address, 2 bits ignored. */
-#define R_PPC_ADDR16 3 /* 16bit absolute address */
-#define R_PPC_ADDR16_LO 4 /* lower 16bit of absolute address */
-#define R_PPC_ADDR16_HI 5 /* high 16bit of absolute address */
-#define R_PPC_ADDR16_HA 6 /* adjusted high 16bit */
-#define R_PPC_ADDR14 7 /* 16bit address, 2 bits ignored */
-#define R_PPC_ADDR14_BRTAKEN 8
-#define R_PPC_ADDR14_BRNTAKEN 9
-#define R_PPC_REL24 10 /* PC relative 26 bit */
-#define R_PPC_REL14 11 /* PC relative 16 bit */
-#define R_PPC_REL14_BRTAKEN 12
-#define R_PPC_REL14_BRNTAKEN 13
-#define R_PPC_GOT16 14
-#define R_PPC_GOT16_LO 15
-#define R_PPC_GOT16_HI 16
-#define R_PPC_GOT16_HA 17
-#define R_PPC_PLTREL24 18
-#define R_PPC_COPY 19
-#define R_PPC_GLOB_DAT 20
-#define R_PPC_JMP_SLOT 21
-#define R_PPC_RELATIVE 22
-#define R_PPC_LOCAL24PC 23
-#define R_PPC_UADDR32 24
-#define R_PPC_UADDR16 25
-#define R_PPC_REL32 26
-#define R_PPC_PLT32 27
-#define R_PPC_PLTREL32 28
-#define R_PPC_PLT16_LO 29
-#define R_PPC_PLT16_HI 30
-#define R_PPC_PLT16_HA 31
-#define R_PPC_SDAREL16 32
-#define R_PPC_SECTOFF 33
-#define R_PPC_SECTOFF_LO 34
-#define R_PPC_SECTOFF_HI 35
-#define R_PPC_SECTOFF_HA 36
-
-/* PowerPC relocations defined for the TLS access ABI. */
-#define R_PPC_TLS 67 /* none (sym+add)@tls */
-#define R_PPC_DTPMOD32 68 /* word32 (sym+add)@dtpmod */
-#define R_PPC_TPREL16 69 /* half16* (sym+add)@tprel */
-#define R_PPC_TPREL16_LO 70 /* half16 (sym+add)@tprel@l */
-#define R_PPC_TPREL16_HI 71 /* half16 (sym+add)@tprel@h */
-#define R_PPC_TPREL16_HA 72 /* half16 (sym+add)@tprel@ha */
-#define R_PPC_TPREL32 73 /* word32 (sym+add)@tprel */
-#define R_PPC_DTPREL16 74 /* half16* (sym+add)@dtprel */
-#define R_PPC_DTPREL16_LO 75 /* half16 (sym+add)@dtprel@l */
-#define R_PPC_DTPREL16_HI 76 /* half16 (sym+add)@dtprel@h */
-#define R_PPC_DTPREL16_HA 77 /* half16 (sym+add)@dtprel@ha */
-#define R_PPC_DTPREL32 78 /* word32 (sym+add)@dtprel */
-#define R_PPC_GOT_TLSGD16 79 /* half16* (sym+add)@got@tlsgd */
-#define R_PPC_GOT_TLSGD16_LO 80 /* half16 (sym+add)@got@tlsgd@l */
-#define R_PPC_GOT_TLSGD16_HI 81 /* half16 (sym+add)@got@tlsgd@h */
-#define R_PPC_GOT_TLSGD16_HA 82 /* half16 (sym+add)@got@tlsgd@ha */
-#define R_PPC_GOT_TLSLD16 83 /* half16* (sym+add)@got@tlsld */
-#define R_PPC_GOT_TLSLD16_LO 84 /* half16 (sym+add)@got@tlsld@l */
-#define R_PPC_GOT_TLSLD16_HI 85 /* half16 (sym+add)@got@tlsld@h */
-#define R_PPC_GOT_TLSLD16_HA 86 /* half16 (sym+add)@got@tlsld@ha */
-#define R_PPC_GOT_TPREL16 87 /* half16* (sym+add)@got@tprel */
-#define R_PPC_GOT_TPREL16_LO 88 /* half16 (sym+add)@got@tprel@l */
-#define R_PPC_GOT_TPREL16_HI 89 /* half16 (sym+add)@got@tprel@h */
-#define R_PPC_GOT_TPREL16_HA 90 /* half16 (sym+add)@got@tprel@ha */
-#define R_PPC_GOT_DTPREL16 91 /* half16* (sym+add)@got@dtprel */
-#define R_PPC_GOT_DTPREL16_LO 92 /* half16* (sym+add)@got@dtprel@l */
-#define R_PPC_GOT_DTPREL16_HI 93 /* half16* (sym+add)@got@dtprel@h */
-#define R_PPC_GOT_DTPREL16_HA 94 /* half16* (sym+add)@got@dtprel@ha */
-
-/* keep this the last entry. */
-#define R_PPC_NUM 95
-
#define ELF_NGREG 48 /* includes nip, msr, lr, etc. */
#define ELF_NFPREG 33 /* includes fpscr */
@@ -166,133 +94,4 @@ typedef elf_vrreg_t elf_vrregset_t32[ELF_NVRREG32];
typedef elf_fpreg_t elf_vsrreghalf_t32[ELF_NVSRHALFREG];
#endif
-/* PowerPC64 relocations defined by the ABIs */
-#define R_PPC64_NONE R_PPC_NONE
-#define R_PPC64_ADDR32 R_PPC_ADDR32 /* 32bit absolute address. */
-#define R_PPC64_ADDR24 R_PPC_ADDR24 /* 26bit address, word aligned. */
-#define R_PPC64_ADDR16 R_PPC_ADDR16 /* 16bit absolute address. */
-#define R_PPC64_ADDR16_LO R_PPC_ADDR16_LO /* lower 16bits of abs. address. */
-#define R_PPC64_ADDR16_HI R_PPC_ADDR16_HI /* high 16bits of abs. address. */
-#define R_PPC64_ADDR16_HA R_PPC_ADDR16_HA /* adjusted high 16bits. */
-#define R_PPC64_ADDR14 R_PPC_ADDR14 /* 16bit address, word aligned. */
-#define R_PPC64_ADDR14_BRTAKEN R_PPC_ADDR14_BRTAKEN
-#define R_PPC64_ADDR14_BRNTAKEN R_PPC_ADDR14_BRNTAKEN
-#define R_PPC64_REL24 R_PPC_REL24 /* PC relative 26 bit, word aligned. */
-#define R_PPC64_REL14 R_PPC_REL14 /* PC relative 16 bit. */
-#define R_PPC64_REL14_BRTAKEN R_PPC_REL14_BRTAKEN
-#define R_PPC64_REL14_BRNTAKEN R_PPC_REL14_BRNTAKEN
-#define R_PPC64_GOT16 R_PPC_GOT16
-#define R_PPC64_GOT16_LO R_PPC_GOT16_LO
-#define R_PPC64_GOT16_HI R_PPC_GOT16_HI
-#define R_PPC64_GOT16_HA R_PPC_GOT16_HA
-
-#define R_PPC64_COPY R_PPC_COPY
-#define R_PPC64_GLOB_DAT R_PPC_GLOB_DAT
-#define R_PPC64_JMP_SLOT R_PPC_JMP_SLOT
-#define R_PPC64_RELATIVE R_PPC_RELATIVE
-
-#define R_PPC64_UADDR32 R_PPC_UADDR32
-#define R_PPC64_UADDR16 R_PPC_UADDR16
-#define R_PPC64_REL32 R_PPC_REL32
-#define R_PPC64_PLT32 R_PPC_PLT32
-#define R_PPC64_PLTREL32 R_PPC_PLTREL32
-#define R_PPC64_PLT16_LO R_PPC_PLT16_LO
-#define R_PPC64_PLT16_HI R_PPC_PLT16_HI
-#define R_PPC64_PLT16_HA R_PPC_PLT16_HA
-
-#define R_PPC64_SECTOFF R_PPC_SECTOFF
-#define R_PPC64_SECTOFF_LO R_PPC_SECTOFF_LO
-#define R_PPC64_SECTOFF_HI R_PPC_SECTOFF_HI
-#define R_PPC64_SECTOFF_HA R_PPC_SECTOFF_HA
-#define R_PPC64_ADDR30 37 /* word30 (S + A - P) >> 2. */
-#define R_PPC64_ADDR64 38 /* doubleword64 S + A. */
-#define R_PPC64_ADDR16_HIGHER 39 /* half16 #higher(S + A). */
-#define R_PPC64_ADDR16_HIGHERA 40 /* half16 #highera(S + A). */
-#define R_PPC64_ADDR16_HIGHEST 41 /* half16 #highest(S + A). */
-#define R_PPC64_ADDR16_HIGHESTA 42 /* half16 #highesta(S + A). */
-#define R_PPC64_UADDR64 43 /* doubleword64 S + A. */
-#define R_PPC64_REL64 44 /* doubleword64 S + A - P. */
-#define R_PPC64_PLT64 45 /* doubleword64 L + A. */
-#define R_PPC64_PLTREL64 46 /* doubleword64 L + A - P. */
-#define R_PPC64_TOC16 47 /* half16* S + A - .TOC. */
-#define R_PPC64_TOC16_LO 48 /* half16 #lo(S + A - .TOC.). */
-#define R_PPC64_TOC16_HI 49 /* half16 #hi(S + A - .TOC.). */
-#define R_PPC64_TOC16_HA 50 /* half16 #ha(S + A - .TOC.). */
-#define R_PPC64_TOC 51 /* doubleword64 .TOC. */
-#define R_PPC64_PLTGOT16 52 /* half16* M + A. */
-#define R_PPC64_PLTGOT16_LO 53 /* half16 #lo(M + A). */
-#define R_PPC64_PLTGOT16_HI 54 /* half16 #hi(M + A). */
-#define R_PPC64_PLTGOT16_HA 55 /* half16 #ha(M + A). */
-
-#define R_PPC64_ADDR16_DS 56 /* half16ds* (S + A) >> 2. */
-#define R_PPC64_ADDR16_LO_DS 57 /* half16ds #lo(S + A) >> 2. */
-#define R_PPC64_GOT16_DS 58 /* half16ds* (G + A) >> 2. */
-#define R_PPC64_GOT16_LO_DS 59 /* half16ds #lo(G + A) >> 2. */
-#define R_PPC64_PLT16_LO_DS 60 /* half16ds #lo(L + A) >> 2. */
-#define R_PPC64_SECTOFF_DS 61 /* half16ds* (R + A) >> 2. */
-#define R_PPC64_SECTOFF_LO_DS 62 /* half16ds #lo(R + A) >> 2. */
-#define R_PPC64_TOC16_DS 63 /* half16ds* (S + A - .TOC.) >> 2. */
-#define R_PPC64_TOC16_LO_DS 64 /* half16ds #lo(S + A - .TOC.) >> 2. */
-#define R_PPC64_PLTGOT16_DS 65 /* half16ds* (M + A) >> 2. */
-#define R_PPC64_PLTGOT16_LO_DS 66 /* half16ds #lo(M + A) >> 2. */
-
-/* PowerPC64 relocations defined for the TLS access ABI. */
-#define R_PPC64_TLS 67 /* none (sym+add)@tls */
-#define R_PPC64_DTPMOD64 68 /* doubleword64 (sym+add)@dtpmod */
-#define R_PPC64_TPREL16 69 /* half16* (sym+add)@tprel */
-#define R_PPC64_TPREL16_LO 70 /* half16 (sym+add)@tprel@l */
-#define R_PPC64_TPREL16_HI 71 /* half16 (sym+add)@tprel@h */
-#define R_PPC64_TPREL16_HA 72 /* half16 (sym+add)@tprel@ha */
-#define R_PPC64_TPREL64 73 /* doubleword64 (sym+add)@tprel */
-#define R_PPC64_DTPREL16 74 /* half16* (sym+add)@dtprel */
-#define R_PPC64_DTPREL16_LO 75 /* half16 (sym+add)@dtprel@l */
-#define R_PPC64_DTPREL16_HI 76 /* half16 (sym+add)@dtprel@h */
-#define R_PPC64_DTPREL16_HA 77 /* half16 (sym+add)@dtprel@ha */
-#define R_PPC64_DTPREL64 78 /* doubleword64 (sym+add)@dtprel */
-#define R_PPC64_GOT_TLSGD16 79 /* half16* (sym+add)@got@tlsgd */
-#define R_PPC64_GOT_TLSGD16_LO 80 /* half16 (sym+add)@got@tlsgd@l */
-#define R_PPC64_GOT_TLSGD16_HI 81 /* half16 (sym+add)@got@tlsgd@h */
-#define R_PPC64_GOT_TLSGD16_HA 82 /* half16 (sym+add)@got@tlsgd@ha */
-#define R_PPC64_GOT_TLSLD16 83 /* half16* (sym+add)@got@tlsld */
-#define R_PPC64_GOT_TLSLD16_LO 84 /* half16 (sym+add)@got@tlsld@l */
-#define R_PPC64_GOT_TLSLD16_HI 85 /* half16 (sym+add)@got@tlsld@h */
-#define R_PPC64_GOT_TLSLD16_HA 86 /* half16 (sym+add)@got@tlsld@ha */
-#define R_PPC64_GOT_TPREL16_DS 87 /* half16ds* (sym+add)@got@tprel */
-#define R_PPC64_GOT_TPREL16_LO_DS 88 /* half16ds (sym+add)@got@tprel@l */
-#define R_PPC64_GOT_TPREL16_HI 89 /* half16 (sym+add)@got@tprel@h */
-#define R_PPC64_GOT_TPREL16_HA 90 /* half16 (sym+add)@got@tprel@ha */
-#define R_PPC64_GOT_DTPREL16_DS 91 /* half16ds* (sym+add)@got@dtprel */
-#define R_PPC64_GOT_DTPREL16_LO_DS 92 /* half16ds (sym+add)@got@dtprel@l */
-#define R_PPC64_GOT_DTPREL16_HI 93 /* half16 (sym+add)@got@dtprel@h */
-#define R_PPC64_GOT_DTPREL16_HA 94 /* half16 (sym+add)@got@dtprel@ha */
-#define R_PPC64_TPREL16_DS 95 /* half16ds* (sym+add)@tprel */
-#define R_PPC64_TPREL16_LO_DS 96 /* half16ds (sym+add)@tprel@l */
-#define R_PPC64_TPREL16_HIGHER 97 /* half16 (sym+add)@tprel@higher */
-#define R_PPC64_TPREL16_HIGHERA 98 /* half16 (sym+add)@tprel@highera */
-#define R_PPC64_TPREL16_HIGHEST 99 /* half16 (sym+add)@tprel@highest */
-#define R_PPC64_TPREL16_HIGHESTA 100 /* half16 (sym+add)@tprel@highesta */
-#define R_PPC64_DTPREL16_DS 101 /* half16ds* (sym+add)@dtprel */
-#define R_PPC64_DTPREL16_LO_DS 102 /* half16ds (sym+add)@dtprel@l */
-#define R_PPC64_DTPREL16_HIGHER 103 /* half16 (sym+add)@dtprel@higher */
-#define R_PPC64_DTPREL16_HIGHERA 104 /* half16 (sym+add)@dtprel@highera */
-#define R_PPC64_DTPREL16_HIGHEST 105 /* half16 (sym+add)@dtprel@highest */
-#define R_PPC64_DTPREL16_HIGHESTA 106 /* half16 (sym+add)@dtprel@highesta */
-#define R_PPC64_TLSGD 107
-#define R_PPC64_TLSLD 108
-#define R_PPC64_TOCSAVE 109
-
-#define R_PPC64_REL24_NOTOC 116
-#define R_PPC64_ENTRY 118
-
-#define R_PPC64_PCREL34 132
-#define R_PPC64_GOT_PCREL34 133
-
-#define R_PPC64_REL16 249
-#define R_PPC64_REL16_LO 250
-#define R_PPC64_REL16_HI 251
-#define R_PPC64_REL16_HA 252
-
-/* Keep this the last entry. */
-#define R_PPC64_NUM 253
-
#endif /* _UAPI_ASM_POWERPC_ELF_H */
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index cf931fc05afa1825aa9737a4e6259ec0da678d3a..0d0dfaa7c724d5f0230e5b7b9b713d8587030637 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -113,4 +113,205 @@
#define R_AARCH64_RELATIVE 1027
+/* PowerPC relocations defined by the ABIs */
+#define R_PPC_NONE 0
+#define R_PPC_ADDR32 1 /* 32bit absolute address */
+#define R_PPC_ADDR24 2 /* 26bit address, 2 bits ignored. */
+#define R_PPC_ADDR16 3 /* 16bit absolute address */
+#define R_PPC_ADDR16_LO 4 /* lower 16bit of absolute address */
+#define R_PPC_ADDR16_HI 5 /* high 16bit of absolute address */
+#define R_PPC_ADDR16_HA 6 /* adjusted high 16bit */
+#define R_PPC_ADDR14 7 /* 16bit address, 2 bits ignored */
+#define R_PPC_ADDR14_BRTAKEN 8
+#define R_PPC_ADDR14_BRNTAKEN 9
+#define R_PPC_REL24 10 /* PC relative 26 bit */
+#define R_PPC_REL14 11 /* PC relative 16 bit */
+#define R_PPC_REL14_BRTAKEN 12
+#define R_PPC_REL14_BRNTAKEN 13
+#define R_PPC_GOT16 14
+#define R_PPC_GOT16_LO 15
+#define R_PPC_GOT16_HI 16
+#define R_PPC_GOT16_HA 17
+#define R_PPC_PLTREL24 18
+#define R_PPC_COPY 19
+#define R_PPC_GLOB_DAT 20
+#define R_PPC_JMP_SLOT 21
+#define R_PPC_RELATIVE 22
+#define R_PPC_LOCAL24PC 23
+#define R_PPC_UADDR32 24
+#define R_PPC_UADDR16 25
+#define R_PPC_REL32 26
+#define R_PPC_PLT32 27
+#define R_PPC_PLTREL32 28
+#define R_PPC_PLT16_LO 29
+#define R_PPC_PLT16_HI 30
+#define R_PPC_PLT16_HA 31
+#define R_PPC_SDAREL16 32
+#define R_PPC_SECTOFF 33
+#define R_PPC_SECTOFF_LO 34
+#define R_PPC_SECTOFF_HI 35
+#define R_PPC_SECTOFF_HA 36
+
+/* PowerPC relocations defined for the TLS access ABI. */
+#define R_PPC_TLS 67 /* none (sym+add)@tls */
+#define R_PPC_DTPMOD32 68 /* word32 (sym+add)@dtpmod */
+#define R_PPC_TPREL16 69 /* half16* (sym+add)@tprel */
+#define R_PPC_TPREL16_LO 70 /* half16 (sym+add)@tprel@l */
+#define R_PPC_TPREL16_HI 71 /* half16 (sym+add)@tprel@h */
+#define R_PPC_TPREL16_HA 72 /* half16 (sym+add)@tprel@ha */
+#define R_PPC_TPREL32 73 /* word32 (sym+add)@tprel */
+#define R_PPC_DTPREL16 74 /* half16* (sym+add)@dtprel */
+#define R_PPC_DTPREL16_LO 75 /* half16 (sym+add)@dtprel@l */
+#define R_PPC_DTPREL16_HI 76 /* half16 (sym+add)@dtprel@h */
+#define R_PPC_DTPREL16_HA 77 /* half16 (sym+add)@dtprel@ha */
+#define R_PPC_DTPREL32 78 /* word32 (sym+add)@dtprel */
+#define R_PPC_GOT_TLSGD16 79 /* half16* (sym+add)@got@tlsgd */
+#define R_PPC_GOT_TLSGD16_LO 80 /* half16 (sym+add)@got@tlsgd@l */
+#define R_PPC_GOT_TLSGD16_HI 81 /* half16 (sym+add)@got@tlsgd@h */
+#define R_PPC_GOT_TLSGD16_HA 82 /* half16 (sym+add)@got@tlsgd@ha */
+#define R_PPC_GOT_TLSLD16 83 /* half16* (sym+add)@got@tlsld */
+#define R_PPC_GOT_TLSLD16_LO 84 /* half16 (sym+add)@got@tlsld@l */
+#define R_PPC_GOT_TLSLD16_HI 85 /* half16 (sym+add)@got@tlsld@h */
+#define R_PPC_GOT_TLSLD16_HA 86 /* half16 (sym+add)@got@tlsld@ha */
+#define R_PPC_GOT_TPREL16 87 /* half16* (sym+add)@got@tprel */
+#define R_PPC_GOT_TPREL16_LO 88 /* half16 (sym+add)@got@tprel@l */
+#define R_PPC_GOT_TPREL16_HI 89 /* half16 (sym+add)@got@tprel@h */
+#define R_PPC_GOT_TPREL16_HA 90 /* half16 (sym+add)@got@tprel@ha */
+#define R_PPC_GOT_DTPREL16 91 /* half16* (sym+add)@got@dtprel */
+#define R_PPC_GOT_DTPREL16_LO 92 /* half16* (sym+add)@got@dtprel@l */
+#define R_PPC_GOT_DTPREL16_HI 93 /* half16* (sym+add)@got@dtprel@h */
+#define R_PPC_GOT_DTPREL16_HA 94 /* half16* (sym+add)@got@dtprel@ha */
+
+/* keep this the last entry. */
+#define R_PPC_NUM 95
+
+/* PowerPC64 relocations defined by the ABIs */
+#define R_PPC64_NONE R_PPC_NONE
+#define R_PPC64_ADDR32 R_PPC_ADDR32 /* 32bit absolute address. */
+#define R_PPC64_ADDR24 R_PPC_ADDR24 /* 26bit address, word aligned. */
+#define R_PPC64_ADDR16 R_PPC_ADDR16 /* 16bit absolute address. */
+#define R_PPC64_ADDR16_LO R_PPC_ADDR16_LO /* lower 16bits of abs. address. */
+#define R_PPC64_ADDR16_HI R_PPC_ADDR16_HI /* high 16bits of abs. address. */
+#define R_PPC64_ADDR16_HA R_PPC_ADDR16_HA /* adjusted high 16bits. */
+#define R_PPC64_ADDR14 R_PPC_ADDR14 /* 16bit address, word aligned. */
+#define R_PPC64_ADDR14_BRTAKEN R_PPC_ADDR14_BRTAKEN
+#define R_PPC64_ADDR14_BRNTAKEN R_PPC_ADDR14_BRNTAKEN
+#define R_PPC64_REL24 R_PPC_REL24 /* PC relative 26 bit, word aligned. */
+#define R_PPC64_REL14 R_PPC_REL14 /* PC relative 16 bit. */
+#define R_PPC64_REL14_BRTAKEN R_PPC_REL14_BRTAKEN
+#define R_PPC64_REL14_BRNTAKEN R_PPC_REL14_BRNTAKEN
+#define R_PPC64_GOT16 R_PPC_GOT16
+#define R_PPC64_GOT16_LO R_PPC_GOT16_LO
+#define R_PPC64_GOT16_HI R_PPC_GOT16_HI
+#define R_PPC64_GOT16_HA R_PPC_GOT16_HA
+
+#define R_PPC64_COPY R_PPC_COPY
+#define R_PPC64_GLOB_DAT R_PPC_GLOB_DAT
+#define R_PPC64_JMP_SLOT R_PPC_JMP_SLOT
+#define R_PPC64_RELATIVE R_PPC_RELATIVE
+
+#define R_PPC64_UADDR32 R_PPC_UADDR32
+#define R_PPC64_UADDR16 R_PPC_UADDR16
+#define R_PPC64_REL32 R_PPC_REL32
+#define R_PPC64_PLT32 R_PPC_PLT32
+#define R_PPC64_PLTREL32 R_PPC_PLTREL32
+#define R_PPC64_PLT16_LO R_PPC_PLT16_LO
+#define R_PPC64_PLT16_HI R_PPC_PLT16_HI
+#define R_PPC64_PLT16_HA R_PPC_PLT16_HA
+
+#define R_PPC64_SECTOFF R_PPC_SECTOFF
+#define R_PPC64_SECTOFF_LO R_PPC_SECTOFF_LO
+#define R_PPC64_SECTOFF_HI R_PPC_SECTOFF_HI
+#define R_PPC64_SECTOFF_HA R_PPC_SECTOFF_HA
+#define R_PPC64_ADDR30 37 /* word30 (S + A - P) >> 2. */
+#define R_PPC64_ADDR64 38 /* doubleword64 S + A. */
+#define R_PPC64_ADDR16_HIGHER 39 /* half16 #higher(S + A). */
+#define R_PPC64_ADDR16_HIGHERA 40 /* half16 #highera(S + A). */
+#define R_PPC64_ADDR16_HIGHEST 41 /* half16 #highest(S + A). */
+#define R_PPC64_ADDR16_HIGHESTA 42 /* half16 #highesta(S + A). */
+#define R_PPC64_UADDR64 43 /* doubleword64 S + A. */
+#define R_PPC64_REL64 44 /* doubleword64 S + A - P. */
+#define R_PPC64_PLT64 45 /* doubleword64 L + A. */
+#define R_PPC64_PLTREL64 46 /* doubleword64 L + A - P. */
+#define R_PPC64_TOC16 47 /* half16* S + A - .TOC. */
+#define R_PPC64_TOC16_LO 48 /* half16 #lo(S + A - .TOC.). */
+#define R_PPC64_TOC16_HI 49 /* half16 #hi(S + A - .TOC.). */
+#define R_PPC64_TOC16_HA 50 /* half16 #ha(S + A - .TOC.). */
+#define R_PPC64_TOC 51 /* doubleword64 .TOC. */
+#define R_PPC64_PLTGOT16 52 /* half16* M + A. */
+#define R_PPC64_PLTGOT16_LO 53 /* half16 #lo(M + A). */
+#define R_PPC64_PLTGOT16_HI 54 /* half16 #hi(M + A). */
+#define R_PPC64_PLTGOT16_HA 55 /* half16 #ha(M + A). */
+
+#define R_PPC64_ADDR16_DS 56 /* half16ds* (S + A) >> 2. */
+#define R_PPC64_ADDR16_LO_DS 57 /* half16ds #lo(S + A) >> 2. */
+#define R_PPC64_GOT16_DS 58 /* half16ds* (G + A) >> 2. */
+#define R_PPC64_GOT16_LO_DS 59 /* half16ds #lo(G + A) >> 2. */
+#define R_PPC64_PLT16_LO_DS 60 /* half16ds #lo(L + A) >> 2. */
+#define R_PPC64_SECTOFF_DS 61 /* half16ds* (R + A) >> 2. */
+#define R_PPC64_SECTOFF_LO_DS 62 /* half16ds #lo(R + A) >> 2. */
+#define R_PPC64_TOC16_DS 63 /* half16ds* (S + A - .TOC.) >> 2. */
+#define R_PPC64_TOC16_LO_DS 64 /* half16ds #lo(S + A - .TOC.) >> 2. */
+#define R_PPC64_PLTGOT16_DS 65 /* half16ds* (M + A) >> 2. */
+#define R_PPC64_PLTGOT16_LO_DS 66 /* half16ds #lo(M + A) >> 2. */
+
+/* PowerPC64 relocations defined for the TLS access ABI. */
+#define R_PPC64_TLS 67 /* none (sym+add)@tls */
+#define R_PPC64_DTPMOD64 68 /* doubleword64 (sym+add)@dtpmod */
+#define R_PPC64_TPREL16 69 /* half16* (sym+add)@tprel */
+#define R_PPC64_TPREL16_LO 70 /* half16 (sym+add)@tprel@l */
+#define R_PPC64_TPREL16_HI 71 /* half16 (sym+add)@tprel@h */
+#define R_PPC64_TPREL16_HA 72 /* half16 (sym+add)@tprel@ha */
+#define R_PPC64_TPREL64 73 /* doubleword64 (sym+add)@tprel */
+#define R_PPC64_DTPREL16 74 /* half16* (sym+add)@dtprel */
+#define R_PPC64_DTPREL16_LO 75 /* half16 (sym+add)@dtprel@l */
+#define R_PPC64_DTPREL16_HI 76 /* half16 (sym+add)@dtprel@h */
+#define R_PPC64_DTPREL16_HA 77 /* half16 (sym+add)@dtprel@ha */
+#define R_PPC64_DTPREL64 78 /* doubleword64 (sym+add)@dtprel */
+#define R_PPC64_GOT_TLSGD16 79 /* half16* (sym+add)@got@tlsgd */
+#define R_PPC64_GOT_TLSGD16_LO 80 /* half16 (sym+add)@got@tlsgd@l */
+#define R_PPC64_GOT_TLSGD16_HI 81 /* half16 (sym+add)@got@tlsgd@h */
+#define R_PPC64_GOT_TLSGD16_HA 82 /* half16 (sym+add)@got@tlsgd@ha */
+#define R_PPC64_GOT_TLSLD16 83 /* half16* (sym+add)@got@tlsld */
+#define R_PPC64_GOT_TLSLD16_LO 84 /* half16 (sym+add)@got@tlsld@l */
+#define R_PPC64_GOT_TLSLD16_HI 85 /* half16 (sym+add)@got@tlsld@h */
+#define R_PPC64_GOT_TLSLD16_HA 86 /* half16 (sym+add)@got@tlsld@ha */
+#define R_PPC64_GOT_TPREL16_DS 87 /* half16ds* (sym+add)@got@tprel */
+#define R_PPC64_GOT_TPREL16_LO_DS 88 /* half16ds (sym+add)@got@tprel@l */
+#define R_PPC64_GOT_TPREL16_HI 89 /* half16 (sym+add)@got@tprel@h */
+#define R_PPC64_GOT_TPREL16_HA 90 /* half16 (sym+add)@got@tprel@ha */
+#define R_PPC64_GOT_DTPREL16_DS 91 /* half16ds* (sym+add)@got@dtprel */
+#define R_PPC64_GOT_DTPREL16_LO_DS 92 /* half16ds (sym+add)@got@dtprel@l */
+#define R_PPC64_GOT_DTPREL16_HI 93 /* half16 (sym+add)@got@dtprel@h */
+#define R_PPC64_GOT_DTPREL16_HA 94 /* half16 (sym+add)@got@dtprel@ha */
+#define R_PPC64_TPREL16_DS 95 /* half16ds* (sym+add)@tprel */
+#define R_PPC64_TPREL16_LO_DS 96 /* half16ds (sym+add)@tprel@l */
+#define R_PPC64_TPREL16_HIGHER 97 /* half16 (sym+add)@tprel@higher */
+#define R_PPC64_TPREL16_HIGHERA 98 /* half16 (sym+add)@tprel@highera */
+#define R_PPC64_TPREL16_HIGHEST 99 /* half16 (sym+add)@tprel@highest */
+#define R_PPC64_TPREL16_HIGHESTA 100 /* half16 (sym+add)@tprel@highesta */
+#define R_PPC64_DTPREL16_DS 101 /* half16ds* (sym+add)@dtprel */
+#define R_PPC64_DTPREL16_LO_DS 102 /* half16ds (sym+add)@dtprel@l */
+#define R_PPC64_DTPREL16_HIGHER 103 /* half16 (sym+add)@dtprel@higher */
+#define R_PPC64_DTPREL16_HIGHERA 104 /* half16 (sym+add)@dtprel@highera */
+#define R_PPC64_DTPREL16_HIGHEST 105 /* half16 (sym+add)@dtprel@highest */
+#define R_PPC64_DTPREL16_HIGHESTA 106 /* half16 (sym+add)@dtprel@highesta */
+#define R_PPC64_TLSGD 107
+#define R_PPC64_TLSLD 108
+#define R_PPC64_TOCSAVE 109
+
+#define R_PPC64_REL24_NOTOC 116
+#define R_PPC64_ENTRY 118
+
+#define R_PPC64_PCREL34 132
+#define R_PPC64_GOT_PCREL34 133
+
+#define R_PPC64_REL16 249
+#define R_PPC64_REL16_LO 250
+#define R_PPC64_REL16_HI 251
+#define R_PPC64_REL16_HA 252
+
+/* Keep this the last entry. */
+#define R_PPC64_NUM 253
+
#endif /* _UAPI_LINUX_ELF_R_H */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 06/24] riscv: elf: Move relocation constants to UAPI
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (4 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 05/24] powerpc/elf: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-15 15:05 ` Palmer Dabbelt
2025-08-12 5:44 ` [PATCH v4 07/24] LoongArch: " Thomas Weißschuh
` (19 subsequent siblings)
25 siblings, 1 reply; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These constants are useful for cross-platform userspace, for example to
process ELF files during kernel cross-compilation.
Move them from the kernel-private architecture-specific header to the UAPI.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/riscv/include/uapi/asm/elf.h | 66 ---------------------------------------
include/uapi/linux/elf-r.h | 66 +++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+), 66 deletions(-)
diff --git a/arch/riscv/include/uapi/asm/elf.h b/arch/riscv/include/uapi/asm/elf.h
index 11a71b8533d5759ec724a8359d0ffa2a4f2e976d..05cf74a4a53579006a9cef1ed1dbff81d0e50c87 100644
--- a/arch/riscv/include/uapi/asm/elf.h
+++ b/arch/riscv/include/uapi/asm/elf.h
@@ -32,70 +32,4 @@ typedef union __riscv_fp_state elf_fpregset_t;
#define ELF_RISCV_R_TYPE(r_info) ELF32_R_TYPE(r_info)
#endif
-/*
- * RISC-V relocation types
- */
-
-/* Relocation types used by the dynamic linker */
-#define R_RISCV_NONE 0
-#define R_RISCV_32 1
-#define R_RISCV_64 2
-#define R_RISCV_RELATIVE 3
-#define R_RISCV_COPY 4
-#define R_RISCV_JUMP_SLOT 5
-#define R_RISCV_TLS_DTPMOD32 6
-#define R_RISCV_TLS_DTPMOD64 7
-#define R_RISCV_TLS_DTPREL32 8
-#define R_RISCV_TLS_DTPREL64 9
-#define R_RISCV_TLS_TPREL32 10
-#define R_RISCV_TLS_TPREL64 11
-#define R_RISCV_IRELATIVE 58
-
-/* Relocation types not used by the dynamic linker */
-#define R_RISCV_BRANCH 16
-#define R_RISCV_JAL 17
-#define R_RISCV_CALL 18
-#define R_RISCV_CALL_PLT 19
-#define R_RISCV_GOT_HI20 20
-#define R_RISCV_TLS_GOT_HI20 21
-#define R_RISCV_TLS_GD_HI20 22
-#define R_RISCV_PCREL_HI20 23
-#define R_RISCV_PCREL_LO12_I 24
-#define R_RISCV_PCREL_LO12_S 25
-#define R_RISCV_HI20 26
-#define R_RISCV_LO12_I 27
-#define R_RISCV_LO12_S 28
-#define R_RISCV_TPREL_HI20 29
-#define R_RISCV_TPREL_LO12_I 30
-#define R_RISCV_TPREL_LO12_S 31
-#define R_RISCV_TPREL_ADD 32
-#define R_RISCV_ADD8 33
-#define R_RISCV_ADD16 34
-#define R_RISCV_ADD32 35
-#define R_RISCV_ADD64 36
-#define R_RISCV_SUB8 37
-#define R_RISCV_SUB16 38
-#define R_RISCV_SUB32 39
-#define R_RISCV_SUB64 40
-#define R_RISCV_GNU_VTINHERIT 41
-#define R_RISCV_GNU_VTENTRY 42
-#define R_RISCV_ALIGN 43
-#define R_RISCV_RVC_BRANCH 44
-#define R_RISCV_RVC_JUMP 45
-#define R_RISCV_GPREL_I 47
-#define R_RISCV_GPREL_S 48
-#define R_RISCV_TPREL_I 49
-#define R_RISCV_TPREL_S 50
-#define R_RISCV_RELAX 51
-#define R_RISCV_SUB6 52
-#define R_RISCV_SET6 53
-#define R_RISCV_SET8 54
-#define R_RISCV_SET16 55
-#define R_RISCV_SET32 56
-#define R_RISCV_32_PCREL 57
-#define R_RISCV_PLT32 59
-#define R_RISCV_SET_ULEB128 60
-#define R_RISCV_SUB_ULEB128 61
-
-
#endif /* _UAPI_ASM_RISCV_ELF_H */
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index 0d0dfaa7c724d5f0230e5b7b9b713d8587030637..02e420c255df67f8f7e4bc3165f808b9935f5b1c 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -314,4 +314,70 @@
/* Keep this the last entry. */
#define R_PPC64_NUM 253
+
+/*
+ * RISC-V relocation types
+ */
+
+/* Relocation types used by the dynamic linker */
+#define R_RISCV_NONE 0
+#define R_RISCV_32 1
+#define R_RISCV_64 2
+#define R_RISCV_RELATIVE 3
+#define R_RISCV_COPY 4
+#define R_RISCV_JUMP_SLOT 5
+#define R_RISCV_TLS_DTPMOD32 6
+#define R_RISCV_TLS_DTPMOD64 7
+#define R_RISCV_TLS_DTPREL32 8
+#define R_RISCV_TLS_DTPREL64 9
+#define R_RISCV_TLS_TPREL32 10
+#define R_RISCV_TLS_TPREL64 11
+#define R_RISCV_IRELATIVE 58
+
+/* Relocation types not used by the dynamic linker */
+#define R_RISCV_BRANCH 16
+#define R_RISCV_JAL 17
+#define R_RISCV_CALL 18
+#define R_RISCV_CALL_PLT 19
+#define R_RISCV_GOT_HI20 20
+#define R_RISCV_TLS_GOT_HI20 21
+#define R_RISCV_TLS_GD_HI20 22
+#define R_RISCV_PCREL_HI20 23
+#define R_RISCV_PCREL_LO12_I 24
+#define R_RISCV_PCREL_LO12_S 25
+#define R_RISCV_HI20 26
+#define R_RISCV_LO12_I 27
+#define R_RISCV_LO12_S 28
+#define R_RISCV_TPREL_HI20 29
+#define R_RISCV_TPREL_LO12_I 30
+#define R_RISCV_TPREL_LO12_S 31
+#define R_RISCV_TPREL_ADD 32
+#define R_RISCV_ADD8 33
+#define R_RISCV_ADD16 34
+#define R_RISCV_ADD32 35
+#define R_RISCV_ADD64 36
+#define R_RISCV_SUB8 37
+#define R_RISCV_SUB16 38
+#define R_RISCV_SUB32 39
+#define R_RISCV_SUB64 40
+#define R_RISCV_GNU_VTINHERIT 41
+#define R_RISCV_GNU_VTENTRY 42
+#define R_RISCV_ALIGN 43
+#define R_RISCV_RVC_BRANCH 44
+#define R_RISCV_RVC_JUMP 45
+#define R_RISCV_GPREL_I 47
+#define R_RISCV_GPREL_S 48
+#define R_RISCV_TPREL_I 49
+#define R_RISCV_TPREL_S 50
+#define R_RISCV_RELAX 51
+#define R_RISCV_SUB6 52
+#define R_RISCV_SET6 53
+#define R_RISCV_SET8 54
+#define R_RISCV_SET16 55
+#define R_RISCV_SET32 56
+#define R_RISCV_32_PCREL 57
+#define R_RISCV_PLT32 59
+#define R_RISCV_SET_ULEB128 60
+#define R_RISCV_SUB_ULEB128 61
+
#endif /* _UAPI_LINUX_ELF_R_H */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH v4 06/24] riscv: elf: Move relocation constants to UAPI
2025-08-12 5:44 ` [PATCH v4 06/24] riscv: elf: " Thomas Weißschuh
@ 2025-08-15 15:05 ` Palmer Dabbelt
0 siblings, 0 replies; 32+ messages in thread
From: Palmer Dabbelt @ 2025-08-15 15:05 UTC (permalink / raw)
To: thomas.weissschuh
Cc: Paul Walmsley, aou, Alexandre Ghiti, nathan,
nick.desaulniers+lkml, morbo, justinstitt, luto, tglx,
vincenzo.frascino, kees, mingo, bp, dave.hansen, x86, hpa,
richard, anton.ivanov, johannes, linux, Catalin Marinas,
Will Deacon, maddy, mpe, npiggin, christophe.leroy, chenhuacai,
kernel, hca, gor, agordeev, borntraeger, svens, tsbogend, ojeda,
alex.gaynor, boqun.feng, gary, bjorn3_gh, lossin, a.hindborg,
aliceryhl, tmgross, dakr, nicolas.schier, linux-riscv,
linux-kernel, llvm, linux-mm, linux-um, linux-arm-kernel,
linuxppc-dev, loongarch, linux-s390, linux-mips, rust-for-linux,
linux-kbuild, jstancek, acme, alexghiti, thomas.weissschuh
On Mon, 11 Aug 2025 22:44:19 PDT (-0700), thomas.weissschuh@linutronix.de wrote:
> These constants are useful for cross-platform userspace, for example to
> process ELF files during kernel cross-compilation.
>
> Move them from the kernel-private architecture-specific header to the UAPI.
>
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
> ---
> arch/riscv/include/uapi/asm/elf.h | 66 ---------------------------------------
> include/uapi/linux/elf-r.h | 66 +++++++++++++++++++++++++++++++++++++++
> 2 files changed, 66 insertions(+), 66 deletions(-)
Acked-by: Palmer Dabbelt <palmer@dabbelt.com>
I'm going to assume you want to take these all together though some
other tree, thanks!
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v4 07/24] LoongArch: Move relocation constants to UAPI
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (5 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 06/24] riscv: elf: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 08/24] s390/elf: " Thomas Weißschuh
` (18 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These constants are useful for cross-platform userspace, for example to
process ELF files during kernel cross-compilation.
Move them from the kernel-private architecture-specific header to the UAPI.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/loongarch/include/asm/elf.h | 100 ---------------------------------------
include/uapi/linux/elf-r.h | 100 +++++++++++++++++++++++++++++++++++++++
2 files changed, 100 insertions(+), 100 deletions(-)
diff --git a/arch/loongarch/include/asm/elf.h b/arch/loongarch/include/asm/elf.h
index f16bd42456e4ccf3ad6c8917165176b8ef5d8f05..5e4bcba21da2fe1b95045821156764a8f2c61fca 100644
--- a/arch/loongarch/include/asm/elf.h
+++ b/arch/loongarch/include/asm/elf.h
@@ -21,106 +21,6 @@
#define EF_LOONGARCH_ABI_ILP32_SINGLE_FLOAT 0x6
#define EF_LOONGARCH_ABI_ILP32_DOUBLE_FLOAT 0x7
-/* LoongArch relocation types used by the dynamic linker */
-#define R_LARCH_NONE 0
-#define R_LARCH_32 1
-#define R_LARCH_64 2
-#define R_LARCH_RELATIVE 3
-#define R_LARCH_COPY 4
-#define R_LARCH_JUMP_SLOT 5
-#define R_LARCH_TLS_DTPMOD32 6
-#define R_LARCH_TLS_DTPMOD64 7
-#define R_LARCH_TLS_DTPREL32 8
-#define R_LARCH_TLS_DTPREL64 9
-#define R_LARCH_TLS_TPREL32 10
-#define R_LARCH_TLS_TPREL64 11
-#define R_LARCH_IRELATIVE 12
-#define R_LARCH_MARK_LA 20
-#define R_LARCH_MARK_PCREL 21
-#define R_LARCH_SOP_PUSH_PCREL 22
-#define R_LARCH_SOP_PUSH_ABSOLUTE 23
-#define R_LARCH_SOP_PUSH_DUP 24
-#define R_LARCH_SOP_PUSH_GPREL 25
-#define R_LARCH_SOP_PUSH_TLS_TPREL 26
-#define R_LARCH_SOP_PUSH_TLS_GOT 27
-#define R_LARCH_SOP_PUSH_TLS_GD 28
-#define R_LARCH_SOP_PUSH_PLT_PCREL 29
-#define R_LARCH_SOP_ASSERT 30
-#define R_LARCH_SOP_NOT 31
-#define R_LARCH_SOP_SUB 32
-#define R_LARCH_SOP_SL 33
-#define R_LARCH_SOP_SR 34
-#define R_LARCH_SOP_ADD 35
-#define R_LARCH_SOP_AND 36
-#define R_LARCH_SOP_IF_ELSE 37
-#define R_LARCH_SOP_POP_32_S_10_5 38
-#define R_LARCH_SOP_POP_32_U_10_12 39
-#define R_LARCH_SOP_POP_32_S_10_12 40
-#define R_LARCH_SOP_POP_32_S_10_16 41
-#define R_LARCH_SOP_POP_32_S_10_16_S2 42
-#define R_LARCH_SOP_POP_32_S_5_20 43
-#define R_LARCH_SOP_POP_32_S_0_5_10_16_S2 44
-#define R_LARCH_SOP_POP_32_S_0_10_10_16_S2 45
-#define R_LARCH_SOP_POP_32_U 46
-#define R_LARCH_ADD8 47
-#define R_LARCH_ADD16 48
-#define R_LARCH_ADD24 49
-#define R_LARCH_ADD32 50
-#define R_LARCH_ADD64 51
-#define R_LARCH_SUB8 52
-#define R_LARCH_SUB16 53
-#define R_LARCH_SUB24 54
-#define R_LARCH_SUB32 55
-#define R_LARCH_SUB64 56
-#define R_LARCH_GNU_VTINHERIT 57
-#define R_LARCH_GNU_VTENTRY 58
-#define R_LARCH_B16 64
-#define R_LARCH_B21 65
-#define R_LARCH_B26 66
-#define R_LARCH_ABS_HI20 67
-#define R_LARCH_ABS_LO12 68
-#define R_LARCH_ABS64_LO20 69
-#define R_LARCH_ABS64_HI12 70
-#define R_LARCH_PCALA_HI20 71
-#define R_LARCH_PCALA_LO12 72
-#define R_LARCH_PCALA64_LO20 73
-#define R_LARCH_PCALA64_HI12 74
-#define R_LARCH_GOT_PC_HI20 75
-#define R_LARCH_GOT_PC_LO12 76
-#define R_LARCH_GOT64_PC_LO20 77
-#define R_LARCH_GOT64_PC_HI12 78
-#define R_LARCH_GOT_HI20 79
-#define R_LARCH_GOT_LO12 80
-#define R_LARCH_GOT64_LO20 81
-#define R_LARCH_GOT64_HI12 82
-#define R_LARCH_TLS_LE_HI20 83
-#define R_LARCH_TLS_LE_LO12 84
-#define R_LARCH_TLS_LE64_LO20 85
-#define R_LARCH_TLS_LE64_HI12 86
-#define R_LARCH_TLS_IE_PC_HI20 87
-#define R_LARCH_TLS_IE_PC_LO12 88
-#define R_LARCH_TLS_IE64_PC_LO20 89
-#define R_LARCH_TLS_IE64_PC_HI12 90
-#define R_LARCH_TLS_IE_HI20 91
-#define R_LARCH_TLS_IE_LO12 92
-#define R_LARCH_TLS_IE64_LO20 93
-#define R_LARCH_TLS_IE64_HI12 94
-#define R_LARCH_TLS_LD_PC_HI20 95
-#define R_LARCH_TLS_LD_HI20 96
-#define R_LARCH_TLS_GD_PC_HI20 97
-#define R_LARCH_TLS_GD_HI20 98
-#define R_LARCH_32_PCREL 99
-#define R_LARCH_RELAX 100
-#define R_LARCH_DELETE 101
-#define R_LARCH_ALIGN 102
-#define R_LARCH_PCREL20_S2 103
-#define R_LARCH_CFA 104
-#define R_LARCH_ADD6 105
-#define R_LARCH_SUB6 106
-#define R_LARCH_ADD_ULEB128 107
-#define R_LARCH_SUB_ULEB128 108
-#define R_LARCH_64_PCREL 109
-
#ifndef ELF_ARCH
/* ELF register definitions */
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index 02e420c255df67f8f7e4bc3165f808b9935f5b1c..576d974db6e31f8a9cd995f7428c85bd41102415 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -380,4 +380,104 @@
#define R_RISCV_SET_ULEB128 60
#define R_RISCV_SUB_ULEB128 61
+/* LoongArch relocation types used by the dynamic linker */
+#define R_LARCH_NONE 0
+#define R_LARCH_32 1
+#define R_LARCH_64 2
+#define R_LARCH_RELATIVE 3
+#define R_LARCH_COPY 4
+#define R_LARCH_JUMP_SLOT 5
+#define R_LARCH_TLS_DTPMOD32 6
+#define R_LARCH_TLS_DTPMOD64 7
+#define R_LARCH_TLS_DTPREL32 8
+#define R_LARCH_TLS_DTPREL64 9
+#define R_LARCH_TLS_TPREL32 10
+#define R_LARCH_TLS_TPREL64 11
+#define R_LARCH_IRELATIVE 12
+#define R_LARCH_MARK_LA 20
+#define R_LARCH_MARK_PCREL 21
+#define R_LARCH_SOP_PUSH_PCREL 22
+#define R_LARCH_SOP_PUSH_ABSOLUTE 23
+#define R_LARCH_SOP_PUSH_DUP 24
+#define R_LARCH_SOP_PUSH_GPREL 25
+#define R_LARCH_SOP_PUSH_TLS_TPREL 26
+#define R_LARCH_SOP_PUSH_TLS_GOT 27
+#define R_LARCH_SOP_PUSH_TLS_GD 28
+#define R_LARCH_SOP_PUSH_PLT_PCREL 29
+#define R_LARCH_SOP_ASSERT 30
+#define R_LARCH_SOP_NOT 31
+#define R_LARCH_SOP_SUB 32
+#define R_LARCH_SOP_SL 33
+#define R_LARCH_SOP_SR 34
+#define R_LARCH_SOP_ADD 35
+#define R_LARCH_SOP_AND 36
+#define R_LARCH_SOP_IF_ELSE 37
+#define R_LARCH_SOP_POP_32_S_10_5 38
+#define R_LARCH_SOP_POP_32_U_10_12 39
+#define R_LARCH_SOP_POP_32_S_10_12 40
+#define R_LARCH_SOP_POP_32_S_10_16 41
+#define R_LARCH_SOP_POP_32_S_10_16_S2 42
+#define R_LARCH_SOP_POP_32_S_5_20 43
+#define R_LARCH_SOP_POP_32_S_0_5_10_16_S2 44
+#define R_LARCH_SOP_POP_32_S_0_10_10_16_S2 45
+#define R_LARCH_SOP_POP_32_U 46
+#define R_LARCH_ADD8 47
+#define R_LARCH_ADD16 48
+#define R_LARCH_ADD24 49
+#define R_LARCH_ADD32 50
+#define R_LARCH_ADD64 51
+#define R_LARCH_SUB8 52
+#define R_LARCH_SUB16 53
+#define R_LARCH_SUB24 54
+#define R_LARCH_SUB32 55
+#define R_LARCH_SUB64 56
+#define R_LARCH_GNU_VTINHERIT 57
+#define R_LARCH_GNU_VTENTRY 58
+#define R_LARCH_B16 64
+#define R_LARCH_B21 65
+#define R_LARCH_B26 66
+#define R_LARCH_ABS_HI20 67
+#define R_LARCH_ABS_LO12 68
+#define R_LARCH_ABS64_LO20 69
+#define R_LARCH_ABS64_HI12 70
+#define R_LARCH_PCALA_HI20 71
+#define R_LARCH_PCALA_LO12 72
+#define R_LARCH_PCALA64_LO20 73
+#define R_LARCH_PCALA64_HI12 74
+#define R_LARCH_GOT_PC_HI20 75
+#define R_LARCH_GOT_PC_LO12 76
+#define R_LARCH_GOT64_PC_LO20 77
+#define R_LARCH_GOT64_PC_HI12 78
+#define R_LARCH_GOT_HI20 79
+#define R_LARCH_GOT_LO12 80
+#define R_LARCH_GOT64_LO20 81
+#define R_LARCH_GOT64_HI12 82
+#define R_LARCH_TLS_LE_HI20 83
+#define R_LARCH_TLS_LE_LO12 84
+#define R_LARCH_TLS_LE64_LO20 85
+#define R_LARCH_TLS_LE64_HI12 86
+#define R_LARCH_TLS_IE_PC_HI20 87
+#define R_LARCH_TLS_IE_PC_LO12 88
+#define R_LARCH_TLS_IE64_PC_LO20 89
+#define R_LARCH_TLS_IE64_PC_HI12 90
+#define R_LARCH_TLS_IE_HI20 91
+#define R_LARCH_TLS_IE_LO12 92
+#define R_LARCH_TLS_IE64_LO20 93
+#define R_LARCH_TLS_IE64_HI12 94
+#define R_LARCH_TLS_LD_PC_HI20 95
+#define R_LARCH_TLS_LD_HI20 96
+#define R_LARCH_TLS_GD_PC_HI20 97
+#define R_LARCH_TLS_GD_HI20 98
+#define R_LARCH_32_PCREL 99
+#define R_LARCH_RELAX 100
+#define R_LARCH_DELETE 101
+#define R_LARCH_ALIGN 102
+#define R_LARCH_PCREL20_S2 103
+#define R_LARCH_CFA 104
+#define R_LARCH_ADD6 105
+#define R_LARCH_SUB6 106
+#define R_LARCH_ADD_ULEB128 107
+#define R_LARCH_SUB_ULEB128 108
+#define R_LARCH_64_PCREL 109
+
#endif /* _UAPI_LINUX_ELF_R_H */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 08/24] s390/elf: Move relocation constants to UAPI
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (6 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 07/24] LoongArch: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 09/24] MIPS: ELF: " Thomas Weißschuh
` (17 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These constants are useful for cross-platform userspace, for example to
process ELF files during kernel cross-compilation.
Move them from the kernel-private architecture-specific header to the UAPI.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/s390/include/asm/elf.h | 83 ---------------------------------------------
include/uapi/linux/elf-r.h | 83 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 83 insertions(+), 83 deletions(-)
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index a03df312081ef93f95ab70ccb5a5d2bdf88d84ec..ce5306178ceaaa17afdaa1fbe4896d0125d1ab09 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -8,89 +8,6 @@
#ifndef __ASMS390_ELF_H
#define __ASMS390_ELF_H
-/* s390 relocations defined by the ABIs */
-#define R_390_NONE 0 /* No reloc. */
-#define R_390_8 1 /* Direct 8 bit. */
-#define R_390_12 2 /* Direct 12 bit. */
-#define R_390_16 3 /* Direct 16 bit. */
-#define R_390_32 4 /* Direct 32 bit. */
-#define R_390_PC32 5 /* PC relative 32 bit. */
-#define R_390_GOT12 6 /* 12 bit GOT offset. */
-#define R_390_GOT32 7 /* 32 bit GOT offset. */
-#define R_390_PLT32 8 /* 32 bit PC relative PLT address. */
-#define R_390_COPY 9 /* Copy symbol at runtime. */
-#define R_390_GLOB_DAT 10 /* Create GOT entry. */
-#define R_390_JMP_SLOT 11 /* Create PLT entry. */
-#define R_390_RELATIVE 12 /* Adjust by program base. */
-#define R_390_GOTOFF32 13 /* 32 bit offset to GOT. */
-#define R_390_GOTPC 14 /* 32 bit PC rel. offset to GOT. */
-#define R_390_GOT16 15 /* 16 bit GOT offset. */
-#define R_390_PC16 16 /* PC relative 16 bit. */
-#define R_390_PC16DBL 17 /* PC relative 16 bit shifted by 1. */
-#define R_390_PLT16DBL 18 /* 16 bit PC rel. PLT shifted by 1. */
-#define R_390_PC32DBL 19 /* PC relative 32 bit shifted by 1. */
-#define R_390_PLT32DBL 20 /* 32 bit PC rel. PLT shifted by 1. */
-#define R_390_GOTPCDBL 21 /* 32 bit PC rel. GOT shifted by 1. */
-#define R_390_64 22 /* Direct 64 bit. */
-#define R_390_PC64 23 /* PC relative 64 bit. */
-#define R_390_GOT64 24 /* 64 bit GOT offset. */
-#define R_390_PLT64 25 /* 64 bit PC relative PLT address. */
-#define R_390_GOTENT 26 /* 32 bit PC rel. to GOT entry >> 1. */
-#define R_390_GOTOFF16 27 /* 16 bit offset to GOT. */
-#define R_390_GOTOFF64 28 /* 64 bit offset to GOT. */
-#define R_390_GOTPLT12 29 /* 12 bit offset to jump slot. */
-#define R_390_GOTPLT16 30 /* 16 bit offset to jump slot. */
-#define R_390_GOTPLT32 31 /* 32 bit offset to jump slot. */
-#define R_390_GOTPLT64 32 /* 64 bit offset to jump slot. */
-#define R_390_GOTPLTENT 33 /* 32 bit rel. offset to jump slot. */
-#define R_390_PLTOFF16 34 /* 16 bit offset from GOT to PLT. */
-#define R_390_PLTOFF32 35 /* 32 bit offset from GOT to PLT. */
-#define R_390_PLTOFF64 36 /* 16 bit offset from GOT to PLT. */
-#define R_390_TLS_LOAD 37 /* Tag for load insn in TLS code. */
-#define R_390_TLS_GDCALL 38 /* Tag for function call in general
- dynamic TLS code. */
-#define R_390_TLS_LDCALL 39 /* Tag for function call in local
- dynamic TLS code. */
-#define R_390_TLS_GD32 40 /* Direct 32 bit for general dynamic
- thread local data. */
-#define R_390_TLS_GD64 41 /* Direct 64 bit for general dynamic
- thread local data. */
-#define R_390_TLS_GOTIE12 42 /* 12 bit GOT offset for static TLS
- block offset. */
-#define R_390_TLS_GOTIE32 43 /* 32 bit GOT offset for static TLS
- block offset. */
-#define R_390_TLS_GOTIE64 44 /* 64 bit GOT offset for static TLS
- block offset. */
-#define R_390_TLS_LDM32 45 /* Direct 32 bit for local dynamic
- thread local data in LD code. */
-#define R_390_TLS_LDM64 46 /* Direct 64 bit for local dynamic
- thread local data in LD code. */
-#define R_390_TLS_IE32 47 /* 32 bit address of GOT entry for
- negated static TLS block offset. */
-#define R_390_TLS_IE64 48 /* 64 bit address of GOT entry for
- negated static TLS block offset. */
-#define R_390_TLS_IEENT 49 /* 32 bit rel. offset to GOT entry for
- negated static TLS block offset. */
-#define R_390_TLS_LE32 50 /* 32 bit negated offset relative to
- static TLS block. */
-#define R_390_TLS_LE64 51 /* 64 bit negated offset relative to
- static TLS block. */
-#define R_390_TLS_LDO32 52 /* 32 bit offset relative to TLS
- block. */
-#define R_390_TLS_LDO64 53 /* 64 bit offset relative to TLS
- block. */
-#define R_390_TLS_DTPMOD 54 /* ID of module containing symbol. */
-#define R_390_TLS_DTPOFF 55 /* Offset in TLS block. */
-#define R_390_TLS_TPOFF 56 /* Negate offset in static TLS
- block. */
-#define R_390_20 57 /* Direct 20 bit. */
-#define R_390_GOT20 58 /* 20 bit GOT offset. */
-#define R_390_GOTPLT20 59 /* 20 bit offset to jump slot. */
-#define R_390_TLS_GOTIE20 60 /* 20 bit GOT offset for static TLS
- block offset. */
-/* Keep this the last entry. */
-#define R_390_NUM 61
-
/*
* HWCAP flags - for AT_HWCAP
*
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index 576d974db6e31f8a9cd995f7428c85bd41102415..c1309a63a7dc4495f22e3d8b51d3f97ab5809190 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -480,4 +480,87 @@
#define R_LARCH_SUB_ULEB128 108
#define R_LARCH_64_PCREL 109
+/* s390 relocations defined by the ABIs */
+#define R_390_NONE 0 /* No reloc. */
+#define R_390_8 1 /* Direct 8 bit. */
+#define R_390_12 2 /* Direct 12 bit. */
+#define R_390_16 3 /* Direct 16 bit. */
+#define R_390_32 4 /* Direct 32 bit. */
+#define R_390_PC32 5 /* PC relative 32 bit. */
+#define R_390_GOT12 6 /* 12 bit GOT offset. */
+#define R_390_GOT32 7 /* 32 bit GOT offset. */
+#define R_390_PLT32 8 /* 32 bit PC relative PLT address. */
+#define R_390_COPY 9 /* Copy symbol at runtime. */
+#define R_390_GLOB_DAT 10 /* Create GOT entry. */
+#define R_390_JMP_SLOT 11 /* Create PLT entry. */
+#define R_390_RELATIVE 12 /* Adjust by program base. */
+#define R_390_GOTOFF32 13 /* 32 bit offset to GOT. */
+#define R_390_GOTPC 14 /* 32 bit PC rel. offset to GOT. */
+#define R_390_GOT16 15 /* 16 bit GOT offset. */
+#define R_390_PC16 16 /* PC relative 16 bit. */
+#define R_390_PC16DBL 17 /* PC relative 16 bit shifted by 1. */
+#define R_390_PLT16DBL 18 /* 16 bit PC rel. PLT shifted by 1. */
+#define R_390_PC32DBL 19 /* PC relative 32 bit shifted by 1. */
+#define R_390_PLT32DBL 20 /* 32 bit PC rel. PLT shifted by 1. */
+#define R_390_GOTPCDBL 21 /* 32 bit PC rel. GOT shifted by 1. */
+#define R_390_64 22 /* Direct 64 bit. */
+#define R_390_PC64 23 /* PC relative 64 bit. */
+#define R_390_GOT64 24 /* 64 bit GOT offset. */
+#define R_390_PLT64 25 /* 64 bit PC relative PLT address. */
+#define R_390_GOTENT 26 /* 32 bit PC rel. to GOT entry >> 1. */
+#define R_390_GOTOFF16 27 /* 16 bit offset to GOT. */
+#define R_390_GOTOFF64 28 /* 64 bit offset to GOT. */
+#define R_390_GOTPLT12 29 /* 12 bit offset to jump slot. */
+#define R_390_GOTPLT16 30 /* 16 bit offset to jump slot. */
+#define R_390_GOTPLT32 31 /* 32 bit offset to jump slot. */
+#define R_390_GOTPLT64 32 /* 64 bit offset to jump slot. */
+#define R_390_GOTPLTENT 33 /* 32 bit rel. offset to jump slot. */
+#define R_390_PLTOFF16 34 /* 16 bit offset from GOT to PLT. */
+#define R_390_PLTOFF32 35 /* 32 bit offset from GOT to PLT. */
+#define R_390_PLTOFF64 36 /* 16 bit offset from GOT to PLT. */
+#define R_390_TLS_LOAD 37 /* Tag for load insn in TLS code. */
+#define R_390_TLS_GDCALL 38 /* Tag for function call in general
+ dynamic TLS code. */
+#define R_390_TLS_LDCALL 39 /* Tag for function call in local
+ dynamic TLS code. */
+#define R_390_TLS_GD32 40 /* Direct 32 bit for general dynamic
+ thread local data. */
+#define R_390_TLS_GD64 41 /* Direct 64 bit for general dynamic
+ thread local data. */
+#define R_390_TLS_GOTIE12 42 /* 12 bit GOT offset for static TLS
+ block offset. */
+#define R_390_TLS_GOTIE32 43 /* 32 bit GOT offset for static TLS
+ block offset. */
+#define R_390_TLS_GOTIE64 44 /* 64 bit GOT offset for static TLS
+ block offset. */
+#define R_390_TLS_LDM32 45 /* Direct 32 bit for local dynamic
+ thread local data in LD code. */
+#define R_390_TLS_LDM64 46 /* Direct 64 bit for local dynamic
+ thread local data in LD code. */
+#define R_390_TLS_IE32 47 /* 32 bit address of GOT entry for
+ negated static TLS block offset. */
+#define R_390_TLS_IE64 48 /* 64 bit address of GOT entry for
+ negated static TLS block offset. */
+#define R_390_TLS_IEENT 49 /* 32 bit rel. offset to GOT entry for
+ negated static TLS block offset. */
+#define R_390_TLS_LE32 50 /* 32 bit negated offset relative to
+ static TLS block. */
+#define R_390_TLS_LE64 51 /* 64 bit negated offset relative to
+ static TLS block. */
+#define R_390_TLS_LDO32 52 /* 32 bit offset relative to TLS
+ block. */
+#define R_390_TLS_LDO64 53 /* 64 bit offset relative to TLS
+ block. */
+#define R_390_TLS_DTPMOD 54 /* ID of module containing symbol. */
+#define R_390_TLS_DTPOFF 55 /* Offset in TLS block. */
+#define R_390_TLS_TPOFF 56 /* Negate offset in static TLS
+ block. */
+#define R_390_20 57 /* Direct 20 bit. */
+#define R_390_GOT20 58 /* 20 bit GOT offset. */
+#define R_390_GOTPLT20 59 /* 20 bit offset to jump slot. */
+#define R_390_TLS_GOTIE20 60 /* 20 bit GOT offset for static TLS
+ block offset. */
+/* Keep this the last entry. */
+#define R_390_NUM 61
+
#endif /* _UAPI_LINUX_ELF_R_H */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 09/24] MIPS: ELF: Move relocation constants to UAPI
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (7 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 08/24] s390/elf: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 10/24] tools headers UAPI: Sync ELF headers with the kernel sources Thomas Weißschuh
` (16 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These constants are useful for cross-platform userspace, for example to
process ELF files during kernel cross-compilation.
Move them from the kernel-private architecture-specific header to the UAPI.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/mips/include/asm/elf.h | 53 --------------------------------------------
include/uapi/linux/elf-r.h | 54 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+), 53 deletions(-)
diff --git a/arch/mips/include/asm/elf.h b/arch/mips/include/asm/elf.h
index dc8d2863752cfd5e8e2cbd750276f9463e0c32b8..347e12584beebbb5a7290efae3310b01220bbe0a 100644
--- a/arch/mips/include/asm/elf.h
+++ b/arch/mips/include/asm/elf.h
@@ -70,59 +70,6 @@
#define DT_MIPS_HIPAGENO 0x70000014
#define DT_MIPS_RLD_MAP 0x70000016
-#define R_MIPS_NONE 0
-#define R_MIPS_16 1
-#define R_MIPS_32 2
-#define R_MIPS_REL32 3
-#define R_MIPS_26 4
-#define R_MIPS_HI16 5
-#define R_MIPS_LO16 6
-#define R_MIPS_GPREL16 7
-#define R_MIPS_LITERAL 8
-#define R_MIPS_GOT16 9
-#define R_MIPS_PC16 10
-#define R_MIPS_CALL16 11
-#define R_MIPS_GPREL32 12
-/* The remaining relocs are defined on Irix, although they are not
- in the MIPS ELF ABI. */
-#define R_MIPS_UNUSED1 13
-#define R_MIPS_UNUSED2 14
-#define R_MIPS_UNUSED3 15
-#define R_MIPS_SHIFT5 16
-#define R_MIPS_SHIFT6 17
-#define R_MIPS_64 18
-#define R_MIPS_GOT_DISP 19
-#define R_MIPS_GOT_PAGE 20
-#define R_MIPS_GOT_OFST 21
-/*
- * The following two relocation types are specified in the MIPS ABI
- * conformance guide version 1.2 but not yet in the psABI.
- */
-#define R_MIPS_GOTHI16 22
-#define R_MIPS_GOTLO16 23
-#define R_MIPS_SUB 24
-#define R_MIPS_INSERT_A 25
-#define R_MIPS_INSERT_B 26
-#define R_MIPS_DELETE 27
-#define R_MIPS_HIGHER 28
-#define R_MIPS_HIGHEST 29
-/*
- * The following two relocation types are specified in the MIPS ABI
- * conformance guide version 1.2 but not yet in the psABI.
- */
-#define R_MIPS_CALLHI16 30
-#define R_MIPS_CALLLO16 31
-/*
- * Introduced for MIPSr6.
- */
-#define R_MIPS_PC21_S2 60
-#define R_MIPS_PC26_S2 61
-/*
- * This range is reserved for vendor specific relocations.
- */
-#define R_MIPS_LOVENDOR 100
-#define R_MIPS_HIVENDOR 127
-
#define SHN_MIPS_ACCOMON 0xff00 /* Allocated common symbols */
#define SHN_MIPS_TEXT 0xff01 /* Allocated test symbols. */
#define SHN_MIPS_DATA 0xff02 /* Allocated data symbols. */
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index c1309a63a7dc4495f22e3d8b51d3f97ab5809190..78085d26f4ab27a003fde65c8e981f575f411758 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -563,4 +563,58 @@
/* Keep this the last entry. */
#define R_390_NUM 61
+/* MIPS relocations defined by the ABIs */
+#define R_MIPS_NONE 0
+#define R_MIPS_16 1
+#define R_MIPS_32 2
+#define R_MIPS_REL32 3
+#define R_MIPS_26 4
+#define R_MIPS_HI16 5
+#define R_MIPS_LO16 6
+#define R_MIPS_GPREL16 7
+#define R_MIPS_LITERAL 8
+#define R_MIPS_GOT16 9
+#define R_MIPS_PC16 10
+#define R_MIPS_CALL16 11
+#define R_MIPS_GPREL32 12
+/* The remaining relocs are defined on Irix, although they are not
+ in the MIPS ELF ABI. */
+#define R_MIPS_UNUSED1 13
+#define R_MIPS_UNUSED2 14
+#define R_MIPS_UNUSED3 15
+#define R_MIPS_SHIFT5 16
+#define R_MIPS_SHIFT6 17
+#define R_MIPS_64 18
+#define R_MIPS_GOT_DISP 19
+#define R_MIPS_GOT_PAGE 20
+#define R_MIPS_GOT_OFST 21
+/*
+ * The following two relocation types are specified in the MIPS ABI
+ * conformance guide version 1.2 but not yet in the psABI.
+ */
+#define R_MIPS_GOTHI16 22
+#define R_MIPS_GOTLO16 23
+#define R_MIPS_SUB 24
+#define R_MIPS_INSERT_A 25
+#define R_MIPS_INSERT_B 26
+#define R_MIPS_DELETE 27
+#define R_MIPS_HIGHER 28
+#define R_MIPS_HIGHEST 29
+/*
+ * The following two relocation types are specified in the MIPS ABI
+ * conformance guide version 1.2 but not yet in the psABI.
+ */
+#define R_MIPS_CALLHI16 30
+#define R_MIPS_CALLLO16 31
+/*
+ * Introduced for MIPSr6.
+ */
+#define R_MIPS_PC21_S2 60
+#define R_MIPS_PC26_S2 61
+/*
+ * This range is reserved for vendor specific relocations.
+ */
+#define R_MIPS_LOVENDOR 100
+#define R_MIPS_HIVENDOR 127
+
#endif /* _UAPI_LINUX_ELF_R_H */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 10/24] tools headers UAPI: Sync ELF headers with the kernel sources
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (8 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 09/24] MIPS: ELF: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 11/24] vdso: Add the vdsocheck tool Thomas Weißschuh
` (15 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
Pick up changes from the UAPI ELF header files.
This picks up general changes to elf.h, elf-em.h which was forgotten
previously and the new elf-r.h.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/include/uapi/linux/elf-em.h | 71 +++++
tools/include/uapi/linux/elf-r.h | 620 ++++++++++++++++++++++++++++++++++++++
tools/include/uapi/linux/elf.h | 112 ++++++-
3 files changed, 792 insertions(+), 11 deletions(-)
diff --git a/tools/include/uapi/linux/elf-em.h b/tools/include/uapi/linux/elf-em.h
new file mode 100644
index 0000000000000000000000000000000000000000..ef38c2bc5ab7a58ba03d309654051b25a2ac2933
--- /dev/null
+++ b/tools/include/uapi/linux/elf-em.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _LINUX_ELF_EM_H
+#define _LINUX_ELF_EM_H
+
+/* These constants define the various ELF target machines */
+#define EM_NONE 0
+#define EM_M32 1
+#define EM_SPARC 2
+#define EM_386 3
+#define EM_68K 4
+#define EM_88K 5
+#define EM_486 6 /* Perhaps disused */
+#define EM_860 7
+#define EM_MIPS 8 /* MIPS R3000 (officially, big-endian only) */
+ /* Next two are historical and binaries and
+ modules of these types will be rejected by
+ Linux. */
+#define EM_MIPS_RS3_LE 10 /* MIPS R3000 little-endian */
+#define EM_MIPS_RS4_BE 10 /* MIPS R4000 big-endian */
+
+#define EM_PARISC 15 /* HPPA */
+#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
+#define EM_PPC 20 /* PowerPC */
+#define EM_PPC64 21 /* PowerPC64 */
+#define EM_SPU 23 /* Cell BE SPU */
+#define EM_ARM 40 /* ARM 32 bit */
+#define EM_SH 42 /* SuperH */
+#define EM_SPARCV9 43 /* SPARC v9 64-bit */
+#define EM_H8_300 46 /* Renesas H8/300 */
+#define EM_IA_64 50 /* HP/Intel IA-64 */
+#define EM_X86_64 62 /* AMD x86-64 */
+#define EM_S390 22 /* IBM S/390 */
+#define EM_CRIS 76 /* Axis Communications 32-bit embedded processor */
+#define EM_M32R 88 /* Renesas M32R */
+#define EM_MN10300 89 /* Panasonic/MEI MN10300, AM33 */
+#define EM_OPENRISC 92 /* OpenRISC 32-bit embedded processor */
+#define EM_ARCOMPACT 93 /* ARCompact processor */
+#define EM_XTENSA 94 /* Tensilica Xtensa Architecture */
+#define EM_BLACKFIN 106 /* ADI Blackfin Processor */
+#define EM_UNICORE 110 /* UniCore-32 */
+#define EM_ALTERA_NIOS2 113 /* Altera Nios II soft-core processor */
+#define EM_TI_C6000 140 /* TI C6X DSPs */
+#define EM_HEXAGON 164 /* QUALCOMM Hexagon */
+#define EM_NDS32 167 /* Andes Technology compact code size
+ embedded RISC processor family */
+#define EM_AARCH64 183 /* ARM 64 bit */
+#define EM_TILEPRO 188 /* Tilera TILEPro */
+#define EM_MICROBLAZE 189 /* Xilinx MicroBlaze */
+#define EM_TILEGX 191 /* Tilera TILE-Gx */
+#define EM_ARCV2 195 /* ARCv2 Cores */
+#define EM_RISCV 243 /* RISC-V */
+#define EM_BPF 247 /* Linux BPF - in-kernel virtual machine */
+#define EM_CSKY 252 /* C-SKY */
+#define EM_LOONGARCH 258 /* LoongArch */
+#define EM_FRV 0x5441 /* Fujitsu FR-V */
+
+/*
+ * This is an interim value that we will use until the committee comes
+ * up with a final number.
+ */
+#define EM_ALPHA 0x9026
+
+/* Bogus old m32r magic number, used by old tools. */
+#define EM_CYGNUS_M32R 0x9041
+/* This is the old interim value for S/390 architecture */
+#define EM_S390_OLD 0xA390
+/* Also Panasonic/MEI MN10300, AM33 */
+#define EM_CYGNUS_MN10300 0xbeef
+
+
+#endif /* _LINUX_ELF_EM_H */
diff --git a/tools/include/uapi/linux/elf-r.h b/tools/include/uapi/linux/elf-r.h
new file mode 100644
index 0000000000000000000000000000000000000000..78085d26f4ab27a003fde65c8e981f575f411758
--- /dev/null
+++ b/tools/include/uapi/linux/elf-r.h
@@ -0,0 +1,620 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_LINUX_ELF_R_H
+#define _UAPI_LINUX_ELF_R_H
+
+/* i386 relocation types */
+#define R_386_NONE 0
+#define R_386_32 1
+#define R_386_PC32 2
+#define R_386_GOT32 3
+#define R_386_PLT32 4
+#define R_386_COPY 5
+#define R_386_GLOB_DAT 6
+#define R_386_JMP_SLOT 7
+#define R_386_RELATIVE 8
+#define R_386_GOTOFF 9
+#define R_386_GOTPC 10
+#define R_386_NUM 11
+
+/* x86-64 relocation types */
+#define R_X86_64_NONE 0 /* No reloc */
+#define R_X86_64_64 1 /* Direct 64 bit */
+#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
+#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
+#define R_X86_64_PLT32 4 /* 32 bit PLT address */
+#define R_X86_64_COPY 5 /* Copy symbol at runtime */
+#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
+#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
+#define R_X86_64_RELATIVE 8 /* Adjust by program base */
+#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
+ offset to GOT */
+#define R_X86_64_32 10 /* Direct 32 bit zero extended */
+#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
+#define R_X86_64_16 12 /* Direct 16 bit zero extended */
+#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
+#define R_X86_64_8 14 /* Direct 8 bit sign extended */
+#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
+#define R_X86_64_PC64 24 /* Place relative 64-bit signed */
+
+/* arm relocation types */
+#define R_ARM_NONE 0
+#define R_ARM_PC24 1
+#define R_ARM_ABS32 2
+#define R_ARM_REL32 3
+#define R_ARM_CALL 28
+#define R_ARM_JUMP24 29
+#define R_ARM_TARGET1 38
+#define R_ARM_V4BX 40
+#define R_ARM_PREL31 42
+#define R_ARM_MOVW_ABS_NC 43
+#define R_ARM_MOVT_ABS 44
+#define R_ARM_MOVW_PREL_NC 45
+#define R_ARM_MOVT_PREL 46
+#define R_ARM_ALU_PC_G0_NC 57
+#define R_ARM_ALU_PC_G1_NC 59
+#define R_ARM_LDR_PC_G2 63
+
+#define R_ARM_THM_CALL 10
+#define R_ARM_THM_JUMP24 30
+#define R_ARM_THM_MOVW_ABS_NC 47
+#define R_ARM_THM_MOVT_ABS 48
+#define R_ARM_THM_MOVW_PREL_NC 49
+#define R_ARM_THM_MOVT_PREL 50
+
+/* AArch64 static relocation types */
+
+/* Miscellaneous. */
+#define R_AARCH64_NONE 256
+
+/* Data. */
+#define R_AARCH64_ABS64 257
+#define R_AARCH64_ABS32 258
+#define R_AARCH64_ABS16 259
+#define R_AARCH64_PREL64 260
+#define R_AARCH64_PREL32 261
+#define R_AARCH64_PREL16 262
+
+/* Instructions. */
+#define R_AARCH64_MOVW_UABS_G0 263
+#define R_AARCH64_MOVW_UABS_G0_NC 264
+#define R_AARCH64_MOVW_UABS_G1 265
+#define R_AARCH64_MOVW_UABS_G1_NC 266
+#define R_AARCH64_MOVW_UABS_G2 267
+#define R_AARCH64_MOVW_UABS_G2_NC 268
+#define R_AARCH64_MOVW_UABS_G3 269
+
+#define R_AARCH64_MOVW_SABS_G0 270
+#define R_AARCH64_MOVW_SABS_G1 271
+#define R_AARCH64_MOVW_SABS_G2 272
+
+#define R_AARCH64_LD_PREL_LO19 273
+#define R_AARCH64_ADR_PREL_LO21 274
+#define R_AARCH64_ADR_PREL_PG_HI21 275
+#define R_AARCH64_ADR_PREL_PG_HI21_NC 276
+#define R_AARCH64_ADD_ABS_LO12_NC 277
+#define R_AARCH64_LDST8_ABS_LO12_NC 278
+
+#define R_AARCH64_TSTBR14 279
+#define R_AARCH64_CONDBR19 280
+#define R_AARCH64_JUMP26 282
+#define R_AARCH64_CALL26 283
+#define R_AARCH64_LDST16_ABS_LO12_NC 284
+#define R_AARCH64_LDST32_ABS_LO12_NC 285
+#define R_AARCH64_LDST64_ABS_LO12_NC 286
+#define R_AARCH64_LDST128_ABS_LO12_NC 299
+
+#define R_AARCH64_MOVW_PREL_G0 287
+#define R_AARCH64_MOVW_PREL_G0_NC 288
+#define R_AARCH64_MOVW_PREL_G1 289
+#define R_AARCH64_MOVW_PREL_G1_NC 290
+#define R_AARCH64_MOVW_PREL_G2 291
+#define R_AARCH64_MOVW_PREL_G2_NC 292
+#define R_AARCH64_MOVW_PREL_G3 293
+
+#define R_AARCH64_RELATIVE 1027
+
+/* PowerPC relocations defined by the ABIs */
+#define R_PPC_NONE 0
+#define R_PPC_ADDR32 1 /* 32bit absolute address */
+#define R_PPC_ADDR24 2 /* 26bit address, 2 bits ignored. */
+#define R_PPC_ADDR16 3 /* 16bit absolute address */
+#define R_PPC_ADDR16_LO 4 /* lower 16bit of absolute address */
+#define R_PPC_ADDR16_HI 5 /* high 16bit of absolute address */
+#define R_PPC_ADDR16_HA 6 /* adjusted high 16bit */
+#define R_PPC_ADDR14 7 /* 16bit address, 2 bits ignored */
+#define R_PPC_ADDR14_BRTAKEN 8
+#define R_PPC_ADDR14_BRNTAKEN 9
+#define R_PPC_REL24 10 /* PC relative 26 bit */
+#define R_PPC_REL14 11 /* PC relative 16 bit */
+#define R_PPC_REL14_BRTAKEN 12
+#define R_PPC_REL14_BRNTAKEN 13
+#define R_PPC_GOT16 14
+#define R_PPC_GOT16_LO 15
+#define R_PPC_GOT16_HI 16
+#define R_PPC_GOT16_HA 17
+#define R_PPC_PLTREL24 18
+#define R_PPC_COPY 19
+#define R_PPC_GLOB_DAT 20
+#define R_PPC_JMP_SLOT 21
+#define R_PPC_RELATIVE 22
+#define R_PPC_LOCAL24PC 23
+#define R_PPC_UADDR32 24
+#define R_PPC_UADDR16 25
+#define R_PPC_REL32 26
+#define R_PPC_PLT32 27
+#define R_PPC_PLTREL32 28
+#define R_PPC_PLT16_LO 29
+#define R_PPC_PLT16_HI 30
+#define R_PPC_PLT16_HA 31
+#define R_PPC_SDAREL16 32
+#define R_PPC_SECTOFF 33
+#define R_PPC_SECTOFF_LO 34
+#define R_PPC_SECTOFF_HI 35
+#define R_PPC_SECTOFF_HA 36
+
+/* PowerPC relocations defined for the TLS access ABI. */
+#define R_PPC_TLS 67 /* none (sym+add)@tls */
+#define R_PPC_DTPMOD32 68 /* word32 (sym+add)@dtpmod */
+#define R_PPC_TPREL16 69 /* half16* (sym+add)@tprel */
+#define R_PPC_TPREL16_LO 70 /* half16 (sym+add)@tprel@l */
+#define R_PPC_TPREL16_HI 71 /* half16 (sym+add)@tprel@h */
+#define R_PPC_TPREL16_HA 72 /* half16 (sym+add)@tprel@ha */
+#define R_PPC_TPREL32 73 /* word32 (sym+add)@tprel */
+#define R_PPC_DTPREL16 74 /* half16* (sym+add)@dtprel */
+#define R_PPC_DTPREL16_LO 75 /* half16 (sym+add)@dtprel@l */
+#define R_PPC_DTPREL16_HI 76 /* half16 (sym+add)@dtprel@h */
+#define R_PPC_DTPREL16_HA 77 /* half16 (sym+add)@dtprel@ha */
+#define R_PPC_DTPREL32 78 /* word32 (sym+add)@dtprel */
+#define R_PPC_GOT_TLSGD16 79 /* half16* (sym+add)@got@tlsgd */
+#define R_PPC_GOT_TLSGD16_LO 80 /* half16 (sym+add)@got@tlsgd@l */
+#define R_PPC_GOT_TLSGD16_HI 81 /* half16 (sym+add)@got@tlsgd@h */
+#define R_PPC_GOT_TLSGD16_HA 82 /* half16 (sym+add)@got@tlsgd@ha */
+#define R_PPC_GOT_TLSLD16 83 /* half16* (sym+add)@got@tlsld */
+#define R_PPC_GOT_TLSLD16_LO 84 /* half16 (sym+add)@got@tlsld@l */
+#define R_PPC_GOT_TLSLD16_HI 85 /* half16 (sym+add)@got@tlsld@h */
+#define R_PPC_GOT_TLSLD16_HA 86 /* half16 (sym+add)@got@tlsld@ha */
+#define R_PPC_GOT_TPREL16 87 /* half16* (sym+add)@got@tprel */
+#define R_PPC_GOT_TPREL16_LO 88 /* half16 (sym+add)@got@tprel@l */
+#define R_PPC_GOT_TPREL16_HI 89 /* half16 (sym+add)@got@tprel@h */
+#define R_PPC_GOT_TPREL16_HA 90 /* half16 (sym+add)@got@tprel@ha */
+#define R_PPC_GOT_DTPREL16 91 /* half16* (sym+add)@got@dtprel */
+#define R_PPC_GOT_DTPREL16_LO 92 /* half16* (sym+add)@got@dtprel@l */
+#define R_PPC_GOT_DTPREL16_HI 93 /* half16* (sym+add)@got@dtprel@h */
+#define R_PPC_GOT_DTPREL16_HA 94 /* half16* (sym+add)@got@dtprel@ha */
+
+/* keep this the last entry. */
+#define R_PPC_NUM 95
+
+/* PowerPC64 relocations defined by the ABIs */
+#define R_PPC64_NONE R_PPC_NONE
+#define R_PPC64_ADDR32 R_PPC_ADDR32 /* 32bit absolute address. */
+#define R_PPC64_ADDR24 R_PPC_ADDR24 /* 26bit address, word aligned. */
+#define R_PPC64_ADDR16 R_PPC_ADDR16 /* 16bit absolute address. */
+#define R_PPC64_ADDR16_LO R_PPC_ADDR16_LO /* lower 16bits of abs. address. */
+#define R_PPC64_ADDR16_HI R_PPC_ADDR16_HI /* high 16bits of abs. address. */
+#define R_PPC64_ADDR16_HA R_PPC_ADDR16_HA /* adjusted high 16bits. */
+#define R_PPC64_ADDR14 R_PPC_ADDR14 /* 16bit address, word aligned. */
+#define R_PPC64_ADDR14_BRTAKEN R_PPC_ADDR14_BRTAKEN
+#define R_PPC64_ADDR14_BRNTAKEN R_PPC_ADDR14_BRNTAKEN
+#define R_PPC64_REL24 R_PPC_REL24 /* PC relative 26 bit, word aligned. */
+#define R_PPC64_REL14 R_PPC_REL14 /* PC relative 16 bit. */
+#define R_PPC64_REL14_BRTAKEN R_PPC_REL14_BRTAKEN
+#define R_PPC64_REL14_BRNTAKEN R_PPC_REL14_BRNTAKEN
+#define R_PPC64_GOT16 R_PPC_GOT16
+#define R_PPC64_GOT16_LO R_PPC_GOT16_LO
+#define R_PPC64_GOT16_HI R_PPC_GOT16_HI
+#define R_PPC64_GOT16_HA R_PPC_GOT16_HA
+
+#define R_PPC64_COPY R_PPC_COPY
+#define R_PPC64_GLOB_DAT R_PPC_GLOB_DAT
+#define R_PPC64_JMP_SLOT R_PPC_JMP_SLOT
+#define R_PPC64_RELATIVE R_PPC_RELATIVE
+
+#define R_PPC64_UADDR32 R_PPC_UADDR32
+#define R_PPC64_UADDR16 R_PPC_UADDR16
+#define R_PPC64_REL32 R_PPC_REL32
+#define R_PPC64_PLT32 R_PPC_PLT32
+#define R_PPC64_PLTREL32 R_PPC_PLTREL32
+#define R_PPC64_PLT16_LO R_PPC_PLT16_LO
+#define R_PPC64_PLT16_HI R_PPC_PLT16_HI
+#define R_PPC64_PLT16_HA R_PPC_PLT16_HA
+
+#define R_PPC64_SECTOFF R_PPC_SECTOFF
+#define R_PPC64_SECTOFF_LO R_PPC_SECTOFF_LO
+#define R_PPC64_SECTOFF_HI R_PPC_SECTOFF_HI
+#define R_PPC64_SECTOFF_HA R_PPC_SECTOFF_HA
+#define R_PPC64_ADDR30 37 /* word30 (S + A - P) >> 2. */
+#define R_PPC64_ADDR64 38 /* doubleword64 S + A. */
+#define R_PPC64_ADDR16_HIGHER 39 /* half16 #higher(S + A). */
+#define R_PPC64_ADDR16_HIGHERA 40 /* half16 #highera(S + A). */
+#define R_PPC64_ADDR16_HIGHEST 41 /* half16 #highest(S + A). */
+#define R_PPC64_ADDR16_HIGHESTA 42 /* half16 #highesta(S + A). */
+#define R_PPC64_UADDR64 43 /* doubleword64 S + A. */
+#define R_PPC64_REL64 44 /* doubleword64 S + A - P. */
+#define R_PPC64_PLT64 45 /* doubleword64 L + A. */
+#define R_PPC64_PLTREL64 46 /* doubleword64 L + A - P. */
+#define R_PPC64_TOC16 47 /* half16* S + A - .TOC. */
+#define R_PPC64_TOC16_LO 48 /* half16 #lo(S + A - .TOC.). */
+#define R_PPC64_TOC16_HI 49 /* half16 #hi(S + A - .TOC.). */
+#define R_PPC64_TOC16_HA 50 /* half16 #ha(S + A - .TOC.). */
+#define R_PPC64_TOC 51 /* doubleword64 .TOC. */
+#define R_PPC64_PLTGOT16 52 /* half16* M + A. */
+#define R_PPC64_PLTGOT16_LO 53 /* half16 #lo(M + A). */
+#define R_PPC64_PLTGOT16_HI 54 /* half16 #hi(M + A). */
+#define R_PPC64_PLTGOT16_HA 55 /* half16 #ha(M + A). */
+
+#define R_PPC64_ADDR16_DS 56 /* half16ds* (S + A) >> 2. */
+#define R_PPC64_ADDR16_LO_DS 57 /* half16ds #lo(S + A) >> 2. */
+#define R_PPC64_GOT16_DS 58 /* half16ds* (G + A) >> 2. */
+#define R_PPC64_GOT16_LO_DS 59 /* half16ds #lo(G + A) >> 2. */
+#define R_PPC64_PLT16_LO_DS 60 /* half16ds #lo(L + A) >> 2. */
+#define R_PPC64_SECTOFF_DS 61 /* half16ds* (R + A) >> 2. */
+#define R_PPC64_SECTOFF_LO_DS 62 /* half16ds #lo(R + A) >> 2. */
+#define R_PPC64_TOC16_DS 63 /* half16ds* (S + A - .TOC.) >> 2. */
+#define R_PPC64_TOC16_LO_DS 64 /* half16ds #lo(S + A - .TOC.) >> 2. */
+#define R_PPC64_PLTGOT16_DS 65 /* half16ds* (M + A) >> 2. */
+#define R_PPC64_PLTGOT16_LO_DS 66 /* half16ds #lo(M + A) >> 2. */
+
+/* PowerPC64 relocations defined for the TLS access ABI. */
+#define R_PPC64_TLS 67 /* none (sym+add)@tls */
+#define R_PPC64_DTPMOD64 68 /* doubleword64 (sym+add)@dtpmod */
+#define R_PPC64_TPREL16 69 /* half16* (sym+add)@tprel */
+#define R_PPC64_TPREL16_LO 70 /* half16 (sym+add)@tprel@l */
+#define R_PPC64_TPREL16_HI 71 /* half16 (sym+add)@tprel@h */
+#define R_PPC64_TPREL16_HA 72 /* half16 (sym+add)@tprel@ha */
+#define R_PPC64_TPREL64 73 /* doubleword64 (sym+add)@tprel */
+#define R_PPC64_DTPREL16 74 /* half16* (sym+add)@dtprel */
+#define R_PPC64_DTPREL16_LO 75 /* half16 (sym+add)@dtprel@l */
+#define R_PPC64_DTPREL16_HI 76 /* half16 (sym+add)@dtprel@h */
+#define R_PPC64_DTPREL16_HA 77 /* half16 (sym+add)@dtprel@ha */
+#define R_PPC64_DTPREL64 78 /* doubleword64 (sym+add)@dtprel */
+#define R_PPC64_GOT_TLSGD16 79 /* half16* (sym+add)@got@tlsgd */
+#define R_PPC64_GOT_TLSGD16_LO 80 /* half16 (sym+add)@got@tlsgd@l */
+#define R_PPC64_GOT_TLSGD16_HI 81 /* half16 (sym+add)@got@tlsgd@h */
+#define R_PPC64_GOT_TLSGD16_HA 82 /* half16 (sym+add)@got@tlsgd@ha */
+#define R_PPC64_GOT_TLSLD16 83 /* half16* (sym+add)@got@tlsld */
+#define R_PPC64_GOT_TLSLD16_LO 84 /* half16 (sym+add)@got@tlsld@l */
+#define R_PPC64_GOT_TLSLD16_HI 85 /* half16 (sym+add)@got@tlsld@h */
+#define R_PPC64_GOT_TLSLD16_HA 86 /* half16 (sym+add)@got@tlsld@ha */
+#define R_PPC64_GOT_TPREL16_DS 87 /* half16ds* (sym+add)@got@tprel */
+#define R_PPC64_GOT_TPREL16_LO_DS 88 /* half16ds (sym+add)@got@tprel@l */
+#define R_PPC64_GOT_TPREL16_HI 89 /* half16 (sym+add)@got@tprel@h */
+#define R_PPC64_GOT_TPREL16_HA 90 /* half16 (sym+add)@got@tprel@ha */
+#define R_PPC64_GOT_DTPREL16_DS 91 /* half16ds* (sym+add)@got@dtprel */
+#define R_PPC64_GOT_DTPREL16_LO_DS 92 /* half16ds (sym+add)@got@dtprel@l */
+#define R_PPC64_GOT_DTPREL16_HI 93 /* half16 (sym+add)@got@dtprel@h */
+#define R_PPC64_GOT_DTPREL16_HA 94 /* half16 (sym+add)@got@dtprel@ha */
+#define R_PPC64_TPREL16_DS 95 /* half16ds* (sym+add)@tprel */
+#define R_PPC64_TPREL16_LO_DS 96 /* half16ds (sym+add)@tprel@l */
+#define R_PPC64_TPREL16_HIGHER 97 /* half16 (sym+add)@tprel@higher */
+#define R_PPC64_TPREL16_HIGHERA 98 /* half16 (sym+add)@tprel@highera */
+#define R_PPC64_TPREL16_HIGHEST 99 /* half16 (sym+add)@tprel@highest */
+#define R_PPC64_TPREL16_HIGHESTA 100 /* half16 (sym+add)@tprel@highesta */
+#define R_PPC64_DTPREL16_DS 101 /* half16ds* (sym+add)@dtprel */
+#define R_PPC64_DTPREL16_LO_DS 102 /* half16ds (sym+add)@dtprel@l */
+#define R_PPC64_DTPREL16_HIGHER 103 /* half16 (sym+add)@dtprel@higher */
+#define R_PPC64_DTPREL16_HIGHERA 104 /* half16 (sym+add)@dtprel@highera */
+#define R_PPC64_DTPREL16_HIGHEST 105 /* half16 (sym+add)@dtprel@highest */
+#define R_PPC64_DTPREL16_HIGHESTA 106 /* half16 (sym+add)@dtprel@highesta */
+#define R_PPC64_TLSGD 107
+#define R_PPC64_TLSLD 108
+#define R_PPC64_TOCSAVE 109
+
+#define R_PPC64_REL24_NOTOC 116
+#define R_PPC64_ENTRY 118
+
+#define R_PPC64_PCREL34 132
+#define R_PPC64_GOT_PCREL34 133
+
+#define R_PPC64_REL16 249
+#define R_PPC64_REL16_LO 250
+#define R_PPC64_REL16_HI 251
+#define R_PPC64_REL16_HA 252
+
+/* Keep this the last entry. */
+#define R_PPC64_NUM 253
+
+
+/*
+ * RISC-V relocation types
+ */
+
+/* Relocation types used by the dynamic linker */
+#define R_RISCV_NONE 0
+#define R_RISCV_32 1
+#define R_RISCV_64 2
+#define R_RISCV_RELATIVE 3
+#define R_RISCV_COPY 4
+#define R_RISCV_JUMP_SLOT 5
+#define R_RISCV_TLS_DTPMOD32 6
+#define R_RISCV_TLS_DTPMOD64 7
+#define R_RISCV_TLS_DTPREL32 8
+#define R_RISCV_TLS_DTPREL64 9
+#define R_RISCV_TLS_TPREL32 10
+#define R_RISCV_TLS_TPREL64 11
+#define R_RISCV_IRELATIVE 58
+
+/* Relocation types not used by the dynamic linker */
+#define R_RISCV_BRANCH 16
+#define R_RISCV_JAL 17
+#define R_RISCV_CALL 18
+#define R_RISCV_CALL_PLT 19
+#define R_RISCV_GOT_HI20 20
+#define R_RISCV_TLS_GOT_HI20 21
+#define R_RISCV_TLS_GD_HI20 22
+#define R_RISCV_PCREL_HI20 23
+#define R_RISCV_PCREL_LO12_I 24
+#define R_RISCV_PCREL_LO12_S 25
+#define R_RISCV_HI20 26
+#define R_RISCV_LO12_I 27
+#define R_RISCV_LO12_S 28
+#define R_RISCV_TPREL_HI20 29
+#define R_RISCV_TPREL_LO12_I 30
+#define R_RISCV_TPREL_LO12_S 31
+#define R_RISCV_TPREL_ADD 32
+#define R_RISCV_ADD8 33
+#define R_RISCV_ADD16 34
+#define R_RISCV_ADD32 35
+#define R_RISCV_ADD64 36
+#define R_RISCV_SUB8 37
+#define R_RISCV_SUB16 38
+#define R_RISCV_SUB32 39
+#define R_RISCV_SUB64 40
+#define R_RISCV_GNU_VTINHERIT 41
+#define R_RISCV_GNU_VTENTRY 42
+#define R_RISCV_ALIGN 43
+#define R_RISCV_RVC_BRANCH 44
+#define R_RISCV_RVC_JUMP 45
+#define R_RISCV_GPREL_I 47
+#define R_RISCV_GPREL_S 48
+#define R_RISCV_TPREL_I 49
+#define R_RISCV_TPREL_S 50
+#define R_RISCV_RELAX 51
+#define R_RISCV_SUB6 52
+#define R_RISCV_SET6 53
+#define R_RISCV_SET8 54
+#define R_RISCV_SET16 55
+#define R_RISCV_SET32 56
+#define R_RISCV_32_PCREL 57
+#define R_RISCV_PLT32 59
+#define R_RISCV_SET_ULEB128 60
+#define R_RISCV_SUB_ULEB128 61
+
+/* LoongArch relocation types used by the dynamic linker */
+#define R_LARCH_NONE 0
+#define R_LARCH_32 1
+#define R_LARCH_64 2
+#define R_LARCH_RELATIVE 3
+#define R_LARCH_COPY 4
+#define R_LARCH_JUMP_SLOT 5
+#define R_LARCH_TLS_DTPMOD32 6
+#define R_LARCH_TLS_DTPMOD64 7
+#define R_LARCH_TLS_DTPREL32 8
+#define R_LARCH_TLS_DTPREL64 9
+#define R_LARCH_TLS_TPREL32 10
+#define R_LARCH_TLS_TPREL64 11
+#define R_LARCH_IRELATIVE 12
+#define R_LARCH_MARK_LA 20
+#define R_LARCH_MARK_PCREL 21
+#define R_LARCH_SOP_PUSH_PCREL 22
+#define R_LARCH_SOP_PUSH_ABSOLUTE 23
+#define R_LARCH_SOP_PUSH_DUP 24
+#define R_LARCH_SOP_PUSH_GPREL 25
+#define R_LARCH_SOP_PUSH_TLS_TPREL 26
+#define R_LARCH_SOP_PUSH_TLS_GOT 27
+#define R_LARCH_SOP_PUSH_TLS_GD 28
+#define R_LARCH_SOP_PUSH_PLT_PCREL 29
+#define R_LARCH_SOP_ASSERT 30
+#define R_LARCH_SOP_NOT 31
+#define R_LARCH_SOP_SUB 32
+#define R_LARCH_SOP_SL 33
+#define R_LARCH_SOP_SR 34
+#define R_LARCH_SOP_ADD 35
+#define R_LARCH_SOP_AND 36
+#define R_LARCH_SOP_IF_ELSE 37
+#define R_LARCH_SOP_POP_32_S_10_5 38
+#define R_LARCH_SOP_POP_32_U_10_12 39
+#define R_LARCH_SOP_POP_32_S_10_12 40
+#define R_LARCH_SOP_POP_32_S_10_16 41
+#define R_LARCH_SOP_POP_32_S_10_16_S2 42
+#define R_LARCH_SOP_POP_32_S_5_20 43
+#define R_LARCH_SOP_POP_32_S_0_5_10_16_S2 44
+#define R_LARCH_SOP_POP_32_S_0_10_10_16_S2 45
+#define R_LARCH_SOP_POP_32_U 46
+#define R_LARCH_ADD8 47
+#define R_LARCH_ADD16 48
+#define R_LARCH_ADD24 49
+#define R_LARCH_ADD32 50
+#define R_LARCH_ADD64 51
+#define R_LARCH_SUB8 52
+#define R_LARCH_SUB16 53
+#define R_LARCH_SUB24 54
+#define R_LARCH_SUB32 55
+#define R_LARCH_SUB64 56
+#define R_LARCH_GNU_VTINHERIT 57
+#define R_LARCH_GNU_VTENTRY 58
+#define R_LARCH_B16 64
+#define R_LARCH_B21 65
+#define R_LARCH_B26 66
+#define R_LARCH_ABS_HI20 67
+#define R_LARCH_ABS_LO12 68
+#define R_LARCH_ABS64_LO20 69
+#define R_LARCH_ABS64_HI12 70
+#define R_LARCH_PCALA_HI20 71
+#define R_LARCH_PCALA_LO12 72
+#define R_LARCH_PCALA64_LO20 73
+#define R_LARCH_PCALA64_HI12 74
+#define R_LARCH_GOT_PC_HI20 75
+#define R_LARCH_GOT_PC_LO12 76
+#define R_LARCH_GOT64_PC_LO20 77
+#define R_LARCH_GOT64_PC_HI12 78
+#define R_LARCH_GOT_HI20 79
+#define R_LARCH_GOT_LO12 80
+#define R_LARCH_GOT64_LO20 81
+#define R_LARCH_GOT64_HI12 82
+#define R_LARCH_TLS_LE_HI20 83
+#define R_LARCH_TLS_LE_LO12 84
+#define R_LARCH_TLS_LE64_LO20 85
+#define R_LARCH_TLS_LE64_HI12 86
+#define R_LARCH_TLS_IE_PC_HI20 87
+#define R_LARCH_TLS_IE_PC_LO12 88
+#define R_LARCH_TLS_IE64_PC_LO20 89
+#define R_LARCH_TLS_IE64_PC_HI12 90
+#define R_LARCH_TLS_IE_HI20 91
+#define R_LARCH_TLS_IE_LO12 92
+#define R_LARCH_TLS_IE64_LO20 93
+#define R_LARCH_TLS_IE64_HI12 94
+#define R_LARCH_TLS_LD_PC_HI20 95
+#define R_LARCH_TLS_LD_HI20 96
+#define R_LARCH_TLS_GD_PC_HI20 97
+#define R_LARCH_TLS_GD_HI20 98
+#define R_LARCH_32_PCREL 99
+#define R_LARCH_RELAX 100
+#define R_LARCH_DELETE 101
+#define R_LARCH_ALIGN 102
+#define R_LARCH_PCREL20_S2 103
+#define R_LARCH_CFA 104
+#define R_LARCH_ADD6 105
+#define R_LARCH_SUB6 106
+#define R_LARCH_ADD_ULEB128 107
+#define R_LARCH_SUB_ULEB128 108
+#define R_LARCH_64_PCREL 109
+
+/* s390 relocations defined by the ABIs */
+#define R_390_NONE 0 /* No reloc. */
+#define R_390_8 1 /* Direct 8 bit. */
+#define R_390_12 2 /* Direct 12 bit. */
+#define R_390_16 3 /* Direct 16 bit. */
+#define R_390_32 4 /* Direct 32 bit. */
+#define R_390_PC32 5 /* PC relative 32 bit. */
+#define R_390_GOT12 6 /* 12 bit GOT offset. */
+#define R_390_GOT32 7 /* 32 bit GOT offset. */
+#define R_390_PLT32 8 /* 32 bit PC relative PLT address. */
+#define R_390_COPY 9 /* Copy symbol at runtime. */
+#define R_390_GLOB_DAT 10 /* Create GOT entry. */
+#define R_390_JMP_SLOT 11 /* Create PLT entry. */
+#define R_390_RELATIVE 12 /* Adjust by program base. */
+#define R_390_GOTOFF32 13 /* 32 bit offset to GOT. */
+#define R_390_GOTPC 14 /* 32 bit PC rel. offset to GOT. */
+#define R_390_GOT16 15 /* 16 bit GOT offset. */
+#define R_390_PC16 16 /* PC relative 16 bit. */
+#define R_390_PC16DBL 17 /* PC relative 16 bit shifted by 1. */
+#define R_390_PLT16DBL 18 /* 16 bit PC rel. PLT shifted by 1. */
+#define R_390_PC32DBL 19 /* PC relative 32 bit shifted by 1. */
+#define R_390_PLT32DBL 20 /* 32 bit PC rel. PLT shifted by 1. */
+#define R_390_GOTPCDBL 21 /* 32 bit PC rel. GOT shifted by 1. */
+#define R_390_64 22 /* Direct 64 bit. */
+#define R_390_PC64 23 /* PC relative 64 bit. */
+#define R_390_GOT64 24 /* 64 bit GOT offset. */
+#define R_390_PLT64 25 /* 64 bit PC relative PLT address. */
+#define R_390_GOTENT 26 /* 32 bit PC rel. to GOT entry >> 1. */
+#define R_390_GOTOFF16 27 /* 16 bit offset to GOT. */
+#define R_390_GOTOFF64 28 /* 64 bit offset to GOT. */
+#define R_390_GOTPLT12 29 /* 12 bit offset to jump slot. */
+#define R_390_GOTPLT16 30 /* 16 bit offset to jump slot. */
+#define R_390_GOTPLT32 31 /* 32 bit offset to jump slot. */
+#define R_390_GOTPLT64 32 /* 64 bit offset to jump slot. */
+#define R_390_GOTPLTENT 33 /* 32 bit rel. offset to jump slot. */
+#define R_390_PLTOFF16 34 /* 16 bit offset from GOT to PLT. */
+#define R_390_PLTOFF32 35 /* 32 bit offset from GOT to PLT. */
+#define R_390_PLTOFF64 36 /* 16 bit offset from GOT to PLT. */
+#define R_390_TLS_LOAD 37 /* Tag for load insn in TLS code. */
+#define R_390_TLS_GDCALL 38 /* Tag for function call in general
+ dynamic TLS code. */
+#define R_390_TLS_LDCALL 39 /* Tag for function call in local
+ dynamic TLS code. */
+#define R_390_TLS_GD32 40 /* Direct 32 bit for general dynamic
+ thread local data. */
+#define R_390_TLS_GD64 41 /* Direct 64 bit for general dynamic
+ thread local data. */
+#define R_390_TLS_GOTIE12 42 /* 12 bit GOT offset for static TLS
+ block offset. */
+#define R_390_TLS_GOTIE32 43 /* 32 bit GOT offset for static TLS
+ block offset. */
+#define R_390_TLS_GOTIE64 44 /* 64 bit GOT offset for static TLS
+ block offset. */
+#define R_390_TLS_LDM32 45 /* Direct 32 bit for local dynamic
+ thread local data in LD code. */
+#define R_390_TLS_LDM64 46 /* Direct 64 bit for local dynamic
+ thread local data in LD code. */
+#define R_390_TLS_IE32 47 /* 32 bit address of GOT entry for
+ negated static TLS block offset. */
+#define R_390_TLS_IE64 48 /* 64 bit address of GOT entry for
+ negated static TLS block offset. */
+#define R_390_TLS_IEENT 49 /* 32 bit rel. offset to GOT entry for
+ negated static TLS block offset. */
+#define R_390_TLS_LE32 50 /* 32 bit negated offset relative to
+ static TLS block. */
+#define R_390_TLS_LE64 51 /* 64 bit negated offset relative to
+ static TLS block. */
+#define R_390_TLS_LDO32 52 /* 32 bit offset relative to TLS
+ block. */
+#define R_390_TLS_LDO64 53 /* 64 bit offset relative to TLS
+ block. */
+#define R_390_TLS_DTPMOD 54 /* ID of module containing symbol. */
+#define R_390_TLS_DTPOFF 55 /* Offset in TLS block. */
+#define R_390_TLS_TPOFF 56 /* Negate offset in static TLS
+ block. */
+#define R_390_20 57 /* Direct 20 bit. */
+#define R_390_GOT20 58 /* 20 bit GOT offset. */
+#define R_390_GOTPLT20 59 /* 20 bit offset to jump slot. */
+#define R_390_TLS_GOTIE20 60 /* 20 bit GOT offset for static TLS
+ block offset. */
+/* Keep this the last entry. */
+#define R_390_NUM 61
+
+/* MIPS relocations defined by the ABIs */
+#define R_MIPS_NONE 0
+#define R_MIPS_16 1
+#define R_MIPS_32 2
+#define R_MIPS_REL32 3
+#define R_MIPS_26 4
+#define R_MIPS_HI16 5
+#define R_MIPS_LO16 6
+#define R_MIPS_GPREL16 7
+#define R_MIPS_LITERAL 8
+#define R_MIPS_GOT16 9
+#define R_MIPS_PC16 10
+#define R_MIPS_CALL16 11
+#define R_MIPS_GPREL32 12
+/* The remaining relocs are defined on Irix, although they are not
+ in the MIPS ELF ABI. */
+#define R_MIPS_UNUSED1 13
+#define R_MIPS_UNUSED2 14
+#define R_MIPS_UNUSED3 15
+#define R_MIPS_SHIFT5 16
+#define R_MIPS_SHIFT6 17
+#define R_MIPS_64 18
+#define R_MIPS_GOT_DISP 19
+#define R_MIPS_GOT_PAGE 20
+#define R_MIPS_GOT_OFST 21
+/*
+ * The following two relocation types are specified in the MIPS ABI
+ * conformance guide version 1.2 but not yet in the psABI.
+ */
+#define R_MIPS_GOTHI16 22
+#define R_MIPS_GOTLO16 23
+#define R_MIPS_SUB 24
+#define R_MIPS_INSERT_A 25
+#define R_MIPS_INSERT_B 26
+#define R_MIPS_DELETE 27
+#define R_MIPS_HIGHER 28
+#define R_MIPS_HIGHEST 29
+/*
+ * The following two relocation types are specified in the MIPS ABI
+ * conformance guide version 1.2 but not yet in the psABI.
+ */
+#define R_MIPS_CALLHI16 30
+#define R_MIPS_CALLLO16 31
+/*
+ * Introduced for MIPSr6.
+ */
+#define R_MIPS_PC21_S2 60
+#define R_MIPS_PC26_S2 61
+/*
+ * This range is reserved for vendor specific relocations.
+ */
+#define R_MIPS_LOVENDOR 100
+#define R_MIPS_HIVENDOR 127
+
+#endif /* _UAPI_LINUX_ELF_R_H */
diff --git a/tools/include/uapi/linux/elf.h b/tools/include/uapi/linux/elf.h
index 5834b83d7f9a41a9d824b3d788ab6ca53b52697c..88bdcbb526c169c946f8fe4a8d0cb57beef3ec0b 100644
--- a/tools/include/uapi/linux/elf.h
+++ b/tools/include/uapi/linux/elf.h
@@ -4,6 +4,7 @@
#include <linux/types.h>
#include <linux/elf-em.h>
+#include <linux/elf-r.h>
/* 32-bit ELF base types. */
typedef __u32 Elf32_Addr;
@@ -32,9 +33,9 @@ typedef __u16 Elf64_Versym;
#define PT_NOTE 4
#define PT_SHLIB 5
#define PT_PHDR 6
-#define PT_TLS 7 /* Thread local storage segment */
-#define PT_LOOS 0x60000000 /* OS-specific */
-#define PT_HIOS 0x6fffffff /* OS-specific */
+#define PT_TLS 7 /* Thread local storage segment */
+#define PT_LOOS 0x60000000 /* OS-specific */
+#define PT_HIOS 0x6fffffff /* OS-specific */
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7fffffff
#define PT_GNU_EH_FRAME (PT_LOOS + 0x474e550)
@@ -95,7 +96,7 @@ typedef __u16 Elf64_Versym;
#define DT_SONAME 14
#define DT_RPATH 15
#define DT_SYMBOLIC 16
-#define DT_REL 17
+#define DT_REL 17
#define DT_RELSZ 18
#define DT_RELENT 19
#define DT_PLTREL 20
@@ -299,8 +300,18 @@ typedef struct elf64_phdr {
#define SHF_WRITE 0x1
#define SHF_ALLOC 0x2
#define SHF_EXECINSTR 0x4
+#define SHF_MERGE 0x10
+#define SHF_STRINGS 0x20
+#define SHF_INFO_LINK 0x40
+#define SHF_LINK_ORDER 0x80
+#define SHF_OS_NONCONFORMING 0x100
+#define SHF_GROUP 0x200
+#define SHF_TLS 0x400
#define SHF_RELA_LIVEPATCH 0x00100000
#define SHF_RO_AFTER_INIT 0x00200000
+#define SHF_ORDERED 0x04000000
+#define SHF_EXCLUDE 0x08000000
+#define SHF_MASKOS 0x0ff00000
#define SHF_MASKPROC 0xf0000000
/* special section indexes */
@@ -312,7 +323,7 @@ typedef struct elf64_phdr {
#define SHN_ABS 0xfff1
#define SHN_COMMON 0xfff2
#define SHN_HIRESERVE 0xffff
-
+
typedef struct elf32_shdr {
Elf32_Word sh_name;
Elf32_Word sh_type;
@@ -376,101 +387,180 @@ typedef struct elf64_shdr {
#define ELF_OSABI ELFOSABI_NONE
#endif
+/* Note definitions: NN_ defines names. NT_ defines types. */
+
+#define NN_GNU_PROPERTY_TYPE_0 "GNU"
+#define NT_GNU_PROPERTY_TYPE_0 5
+
/*
* Notes used in ET_CORE. Architectures export some of the arch register sets
* using the corresponding note types via the PTRACE_GETREGSET and
* PTRACE_SETREGSET requests.
- * The note name for these types is "LINUX", except NT_PRFPREG that is named
- * "CORE".
*/
+#define NN_PRSTATUS "CORE"
#define NT_PRSTATUS 1
+#define NN_PRFPREG "CORE"
#define NT_PRFPREG 2
+#define NN_PRPSINFO "CORE"
#define NT_PRPSINFO 3
+#define NN_TASKSTRUCT "CORE"
#define NT_TASKSTRUCT 4
+#define NN_AUXV "CORE"
#define NT_AUXV 6
/*
* Note to userspace developers: size of NT_SIGINFO note may increase
* in the future to accomodate more fields, don't assume it is fixed!
*/
+#define NN_SIGINFO "CORE"
#define NT_SIGINFO 0x53494749
-#define NT_FILE 0x46494c45
+#define NN_FILE "CORE"
+#define NT_FILE 0x46494c45
+#define NN_PRXFPREG "LINUX"
#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
+#define NN_PPC_VMX "LINUX"
#define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */
+#define NN_PPC_SPE "LINUX"
#define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */
+#define NN_PPC_VSX "LINUX"
#define NT_PPC_VSX 0x102 /* PowerPC VSX registers */
+#define NN_PPC_TAR "LINUX"
#define NT_PPC_TAR 0x103 /* Target Address Register */
+#define NN_PPC_PPR "LINUX"
#define NT_PPC_PPR 0x104 /* Program Priority Register */
+#define NN_PPC_DSCR "LINUX"
#define NT_PPC_DSCR 0x105 /* Data Stream Control Register */
+#define NN_PPC_EBB "LINUX"
#define NT_PPC_EBB 0x106 /* Event Based Branch Registers */
+#define NN_PPC_PMU "LINUX"
#define NT_PPC_PMU 0x107 /* Performance Monitor Registers */
+#define NN_PPC_TM_CGPR "LINUX"
#define NT_PPC_TM_CGPR 0x108 /* TM checkpointed GPR Registers */
+#define NN_PPC_TM_CFPR "LINUX"
#define NT_PPC_TM_CFPR 0x109 /* TM checkpointed FPR Registers */
+#define NN_PPC_TM_CVMX "LINUX"
#define NT_PPC_TM_CVMX 0x10a /* TM checkpointed VMX Registers */
+#define NN_PPC_TM_CVSX "LINUX"
#define NT_PPC_TM_CVSX 0x10b /* TM checkpointed VSX Registers */
+#define NN_PPC_TM_SPR "LINUX"
#define NT_PPC_TM_SPR 0x10c /* TM Special Purpose Registers */
+#define NN_PPC_TM_CTAR "LINUX"
#define NT_PPC_TM_CTAR 0x10d /* TM checkpointed Target Address Register */
+#define NN_PPC_TM_CPPR "LINUX"
#define NT_PPC_TM_CPPR 0x10e /* TM checkpointed Program Priority Register */
+#define NN_PPC_TM_CDSCR "LINUX"
#define NT_PPC_TM_CDSCR 0x10f /* TM checkpointed Data Stream Control Register */
+#define NN_PPC_PKEY "LINUX"
#define NT_PPC_PKEY 0x110 /* Memory Protection Keys registers */
+#define NN_PPC_DEXCR "LINUX"
#define NT_PPC_DEXCR 0x111 /* PowerPC DEXCR registers */
+#define NN_PPC_HASHKEYR "LINUX"
#define NT_PPC_HASHKEYR 0x112 /* PowerPC HASHKEYR register */
+#define NN_386_TLS "LINUX"
#define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */
+#define NN_386_IOPERM "LINUX"
#define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */
+#define NN_X86_XSTATE "LINUX"
#define NT_X86_XSTATE 0x202 /* x86 extended state using xsave */
/* Old binutils treats 0x203 as a CET state */
+#define NN_X86_SHSTK "LINUX"
#define NT_X86_SHSTK 0x204 /* x86 SHSTK state */
+#define NN_X86_XSAVE_LAYOUT "LINUX"
#define NT_X86_XSAVE_LAYOUT 0x205 /* XSAVE layout description */
+#define NN_S390_HIGH_GPRS "LINUX"
#define NT_S390_HIGH_GPRS 0x300 /* s390 upper register halves */
+#define NN_S390_TIMER "LINUX"
#define NT_S390_TIMER 0x301 /* s390 timer register */
+#define NN_S390_TODCMP "LINUX"
#define NT_S390_TODCMP 0x302 /* s390 TOD clock comparator register */
+#define NN_S390_TODPREG "LINUX"
#define NT_S390_TODPREG 0x303 /* s390 TOD programmable register */
+#define NN_S390_CTRS "LINUX"
#define NT_S390_CTRS 0x304 /* s390 control registers */
+#define NN_S390_PREFIX "LINUX"
#define NT_S390_PREFIX 0x305 /* s390 prefix register */
+#define NN_S390_LAST_BREAK "LINUX"
#define NT_S390_LAST_BREAK 0x306 /* s390 breaking event address */
+#define NN_S390_SYSTEM_CALL "LINUX"
#define NT_S390_SYSTEM_CALL 0x307 /* s390 system call restart data */
+#define NN_S390_TDB "LINUX"
#define NT_S390_TDB 0x308 /* s390 transaction diagnostic block */
+#define NN_S390_VXRS_LOW "LINUX"
#define NT_S390_VXRS_LOW 0x309 /* s390 vector registers 0-15 upper half */
+#define NN_S390_VXRS_HIGH "LINUX"
#define NT_S390_VXRS_HIGH 0x30a /* s390 vector registers 16-31 */
+#define NN_S390_GS_CB "LINUX"
#define NT_S390_GS_CB 0x30b /* s390 guarded storage registers */
+#define NN_S390_GS_BC "LINUX"
#define NT_S390_GS_BC 0x30c /* s390 guarded storage broadcast control block */
+#define NN_S390_RI_CB "LINUX"
#define NT_S390_RI_CB 0x30d /* s390 runtime instrumentation */
+#define NN_S390_PV_CPU_DATA "LINUX"
#define NT_S390_PV_CPU_DATA 0x30e /* s390 protvirt cpu dump data */
+#define NN_ARM_VFP "LINUX"
#define NT_ARM_VFP 0x400 /* ARM VFP/NEON registers */
+#define NN_ARM_TLS "LINUX"
#define NT_ARM_TLS 0x401 /* ARM TLS register */
+#define NN_ARM_HW_BREAK "LINUX"
#define NT_ARM_HW_BREAK 0x402 /* ARM hardware breakpoint registers */
+#define NN_ARM_HW_WATCH "LINUX"
#define NT_ARM_HW_WATCH 0x403 /* ARM hardware watchpoint registers */
+#define NN_ARM_SYSTEM_CALL "LINUX"
#define NT_ARM_SYSTEM_CALL 0x404 /* ARM system call number */
+#define NN_ARM_SVE "LINUX"
#define NT_ARM_SVE 0x405 /* ARM Scalable Vector Extension registers */
+#define NN_ARM_PAC_MASK "LINUX"
#define NT_ARM_PAC_MASK 0x406 /* ARM pointer authentication code masks */
+#define NN_ARM_PACA_KEYS "LINUX"
#define NT_ARM_PACA_KEYS 0x407 /* ARM pointer authentication address keys */
+#define NN_ARM_PACG_KEYS "LINUX"
#define NT_ARM_PACG_KEYS 0x408 /* ARM pointer authentication generic key */
+#define NN_ARM_TAGGED_ADDR_CTRL "LINUX"
#define NT_ARM_TAGGED_ADDR_CTRL 0x409 /* arm64 tagged address control (prctl()) */
+#define NN_ARM_PAC_ENABLED_KEYS "LINUX"
#define NT_ARM_PAC_ENABLED_KEYS 0x40a /* arm64 ptr auth enabled keys (prctl()) */
+#define NN_ARM_SSVE "LINUX"
#define NT_ARM_SSVE 0x40b /* ARM Streaming SVE registers */
+#define NN_ARM_ZA "LINUX"
#define NT_ARM_ZA 0x40c /* ARM SME ZA registers */
+#define NN_ARM_ZT "LINUX"
#define NT_ARM_ZT 0x40d /* ARM SME ZT registers */
+#define NN_ARM_FPMR "LINUX"
#define NT_ARM_FPMR 0x40e /* ARM floating point mode register */
+#define NN_ARM_POE "LINUX"
#define NT_ARM_POE 0x40f /* ARM POE registers */
+#define NN_ARM_GCS "LINUX"
#define NT_ARM_GCS 0x410 /* ARM GCS state */
+#define NN_ARC_V2 "LINUX"
#define NT_ARC_V2 0x600 /* ARCv2 accumulator/extra registers */
+#define NN_VMCOREDD "LINUX"
#define NT_VMCOREDD 0x700 /* Vmcore Device Dump Note */
+#define NN_MIPS_DSP "LINUX"
#define NT_MIPS_DSP 0x800 /* MIPS DSP ASE registers */
+#define NN_MIPS_FP_MODE "LINUX"
#define NT_MIPS_FP_MODE 0x801 /* MIPS floating-point mode */
+#define NN_MIPS_MSA "LINUX"
#define NT_MIPS_MSA 0x802 /* MIPS SIMD registers */
+#define NN_RISCV_CSR "LINUX"
#define NT_RISCV_CSR 0x900 /* RISC-V Control and Status Registers */
+#define NN_RISCV_VECTOR "LINUX"
#define NT_RISCV_VECTOR 0x901 /* RISC-V vector registers */
+#define NN_RISCV_TAGGED_ADDR_CTRL "LINUX"
#define NT_RISCV_TAGGED_ADDR_CTRL 0x902 /* RISC-V tagged address control (prctl()) */
+#define NN_LOONGARCH_CPUCFG "LINUX"
#define NT_LOONGARCH_CPUCFG 0xa00 /* LoongArch CPU config registers */
+#define NN_LOONGARCH_CSR "LINUX"
#define NT_LOONGARCH_CSR 0xa01 /* LoongArch control and status registers */
+#define NN_LOONGARCH_LSX "LINUX"
#define NT_LOONGARCH_LSX 0xa02 /* LoongArch Loongson SIMD Extension registers */
+#define NN_LOONGARCH_LASX "LINUX"
#define NT_LOONGARCH_LASX 0xa03 /* LoongArch Loongson Advanced SIMD Extension registers */
+#define NN_LOONGARCH_LBT "LINUX"
#define NT_LOONGARCH_LBT 0xa04 /* LoongArch Loongson Binary Translation registers */
+#define NN_LOONGARCH_HW_BREAK "LINUX"
#define NT_LOONGARCH_HW_BREAK 0xa05 /* LoongArch hardware breakpoint registers */
+#define NN_LOONGARCH_HW_WATCH "LINUX"
#define NT_LOONGARCH_HW_WATCH 0xa06 /* LoongArch hardware watchpoint registers */
-/* Note types with note name "GNU" */
-#define NT_GNU_PROPERTY_TYPE_0 5
-
/* Note header in a PT_NOTE section */
typedef struct elf32_note {
Elf32_Word n_namesz; /* Name size */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 11/24] vdso: Add the vdsocheck tool
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (9 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 10/24] tools headers UAPI: Sync ELF headers with the kernel sources Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 12/24] x86/vdso: Enable " Thomas Weißschuh
` (14 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
All vDSO code needs to be completely position independent. Symbol
references are marked as hidden so the compiler emits PC-relative
relocations. However there are cases where the compiler may still
emit absolute relocations, as they are valid in regular PIC DSO code.
These would be resolved by the linker and will break at runtime.
This has been observed on arm64, see commit 0c314cda9325 ("arm64: vdso:
Work around invalid absolute relocations from GCC")
Introduce a tool to check for absolute relocations during the build,
as the current inline-shell logic is not expressive enough.
The check is done on the object files as the relocations will not exist
anymore in the final DSO. As there is no extension point for the
compilation of each object file, perform the validation in vdso_check.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
lib/vdso/Kconfig | 6 +
lib/vdso/Makefile | 2 +
lib/vdso/Makefile.include | 17 ++
lib/vdso/check/.gitignore | 3 +
lib/vdso/check/Makefile | 28 +++
lib/vdso/check/elf.rs | 488 ++++++++++++++++++++++++++++++++++++++++++++
lib/vdso/check/vdsocheck.rs | 154 ++++++++++++++
7 files changed, 698 insertions(+)
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index 45df764b49ad62479e6456e00c053e46131936a3..b461e2be6db80eae957c8e0a1ab573a85d78fd15 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -48,3 +48,9 @@ config GENERIC_VDSO_DATA_STORE
bool
help
Selected by architectures that use the generic vDSO data store.
+
+config HAVE_VDSOCHECK
+ bool
+ help
+ Selected for architectures that are supported by the 'vdsocheck' progam.
+ Only transitional.
diff --git a/lib/vdso/Makefile b/lib/vdso/Makefile
index aedd40aaa950c86f1454d095d9d46992b0cc0abd..861ca416f9b3343645542f9fd1bd020c5da057b5 100644
--- a/lib/vdso/Makefile
+++ b/lib/vdso/Makefile
@@ -1,3 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
+obj-y += check/
+
obj-$(CONFIG_GENERIC_VDSO_DATA_STORE) += datastore.o
diff --git a/lib/vdso/Makefile.include b/lib/vdso/Makefile.include
index cedbf15f80874d4bb27c097244bc5b11272f261c..759fe41b48f658c399f54aa7d54a3dfeb07e5c9c 100644
--- a/lib/vdso/Makefile.include
+++ b/lib/vdso/Makefile.include
@@ -6,6 +6,15 @@ GENERIC_VDSO_DIR := $(dir $(GENERIC_VDSO_MK_PATH))
c-gettimeofday-$(CONFIG_GENERIC_GETTIMEOFDAY) := $(addprefix $(GENERIC_VDSO_DIR), gettimeofday.c)
c-getrandom-$(CONFIG_VDSO_GETRANDOM) := $(addprefix $(GENERIC_VDSO_DIR), getrandom.c)
+ifeq ($(CONFIG_RUST_IS_AVAILABLE)$(CONFIG_HAVE_VDSOCHECK),yy)
+vdsocheck := lib/vdso/check/vdsocheck
+
+$(vdsocheck): FORCE
+ $(Q)$(MAKE) $(build)=lib/vdso/check vdsocheck
+else
+vdsocheck :=
+endif
+
# This cmd checks that the vdso library does not contain dynamic relocations.
# It has to be called after the linking of the vdso library and requires it
# as a parameter.
@@ -13,6 +22,14 @@ c-getrandom-$(CONFIG_VDSO_GETRANDOM) := $(addprefix $(GENERIC_VDSO_DIR), getrand
# As a workaround for some GNU ld ports which produce unneeded R_*_NONE
# dynamic relocations, ignore R_*_NONE.
quiet_cmd_vdso_check = VDSOCHK $@
+ifneq ($(vdsocheck),)
+ cmd_vdso_check = $(vdsocheck) $(filter %.o, $(real-prereqs)) $@
+else
cmd_vdso_check = if $(READELF) -rW $@ | grep -v _NONE | grep -q " R_\w*_"; \
then (echo >&2 "$@: dynamic relocations are not supported"; \
rm -f $@; /bin/false); fi
+endif
+
+# Variant of cmd_ld which does not try to link the vdsocheck tool.
+quiet_cmd_ld_vdso = VDSOLD $@
+ cmd_ld_vdso = $(LD) $(ld_flags) $(filter-out $(vdsocheck), $(real-prereqs)) -o $@
diff --git a/lib/vdso/check/.gitignore b/lib/vdso/check/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..751be38f11f2147b3fd369539a8913d16546b07c
--- /dev/null
+++ b/lib/vdso/check/.gitignore
@@ -0,0 +1,3 @@
+/bindings.rs
+/libbindings.rlib
+/vdsocheck
diff --git a/lib/vdso/check/Makefile b/lib/vdso/check/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..052997e9ece5c09c6caa15e637455ced1405676f
--- /dev/null
+++ b/lib/vdso/check/Makefile
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+quiet_cmd_host_bindgen = HOSTBINDGEN $@
+ cmd_host_bindgen = $(BINDGEN) $< -o $@ --depfile $(depfile) -- $(HOSTBINDGEN_FLAGS)
+
+quiet_cmd_host_rustlib = HOSTRUSTLIB $@
+ cmd_host_rustlib = \
+ $(HOSTRUSTC) $(hostrust_flags) \
+ --emit=dep-info=$(depfile) --emit=link=$@ \
+ --crate-type rlib \
+ --crate-name $(patsubst %.rlib,%,$(notdir $@)) $<
+
+$(obj)/bindings.rs: HOSTBINDGEN_FLAGS := -I$(srctree)/tools/include/uapi
+$(obj)/bindings.rs: $(srctree)/tools/include/uapi/linux/elf.h FORCE
+ $(call if_changed_dep,host_bindgen)
+
+HOSTRUSTFLAGS_libbindings := -Awarnings
+$(obj)/libbindings.rlib: $(obj)/bindings.rs FORCE
+ $(call if_changed_dep,host_rustlib)
+
+targets += bindings.rs libbindings.rlib
+
+hostprogs += vdsocheck
+vdsocheck-rust := y
+HOSTRUSTFLAGS_vdsocheck := --extern bindings=$(obj)/libbindings.rlib
+$(obj)/vdsocheck: $(obj)/libbindings.rlib
+
+vdsocheck: $(obj)/vdsocheck
diff --git a/lib/vdso/check/elf.rs b/lib/vdso/check/elf.rs
new file mode 100644
index 0000000000000000000000000000000000000000..66e8ab3497aaa9b17a99182a3179273df8845a79
--- /dev/null
+++ b/lib/vdso/check/elf.rs
@@ -0,0 +1,488 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use std::fmt;
+use std::iter::Iterator;
+use std::result::Result;
+use std::str;
+
+use ::bindings;
+
+#[derive(Debug, Copy, Clone)]
+enum ByteOrder {
+ LittleEndian,
+ BigEndian,
+}
+
+trait ToCpu {
+ fn to_cpu(self, byteorder: ByteOrder) -> Self;
+}
+
+macro_rules! declare_to_cpu {
+ ($t:ty) => {
+ impl ToCpu for $t {
+ fn to_cpu(self, byteorder: ByteOrder) -> Self {
+ match byteorder {
+ ByteOrder::LittleEndian => Self::from_le(self),
+ ByteOrder::BigEndian => Self::from_be(self),
+ }
+ }
+ }
+ };
+}
+
+declare_to_cpu!(u16);
+declare_to_cpu!(u32);
+declare_to_cpu!(u64);
+
+#[derive(Debug, Copy, Clone)]
+enum Class {
+ Elf32,
+ Elf64,
+}
+
+enum ClassAlternative<T32, T64> {
+ Elf32(T32),
+ Elf64(T64),
+}
+
+#[derive(Debug)]
+pub(crate) enum ParseError {
+ InvalidFileMagic([u8; 4]),
+ InvalidFileClass(u32),
+ InvalidFileByteOrder(u32),
+ InvalidSectionSize,
+ MissingStringTable,
+ StrtabIndexOutOfRange,
+ IndexOutOfRange,
+ StrtabInvalidData(str::Utf8Error),
+}
+
+pub(crate) type ParseResult<T> = Result<T, ParseError>;
+
+impl fmt::Display for ParseError {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ match self {
+ ParseError::InvalidFileMagic(m) => write!(f, "Invalid ELF magic {:?}", m),
+ ParseError::InvalidFileClass(c) => write!(f, "Invalid ELF class {}", c),
+ ParseError::InvalidFileByteOrder(b) => write!(f, "Invalid ELF byteorder {}", b),
+ ParseError::InvalidSectionSize => write!(f, "Invalid ELF section size"),
+ ParseError::MissingStringTable => write!(f, "Missing string table"),
+ ParseError::IndexOutOfRange => write!(f, "Index out of range"),
+ ParseError::StrtabIndexOutOfRange => write!(f, "String table index out of range"),
+ ParseError::StrtabInvalidData(e) => write!(f, "Invalid data in string table: {}", e),
+ }
+ }
+}
+
+fn read_from_bytes<T>(data: &[u8]) -> ParseResult<T> {
+ if data.len() < std::mem::size_of::<T>() {
+ Err(ParseError::IndexOutOfRange)?
+ }
+ let ptr = data.as_ptr() as *const T;
+ let t: T = unsafe { std::ptr::read_unaligned(ptr) };
+ Ok(t)
+}
+
+fn get_data_subslice(data: &[u8], offset: u64, size: u64) -> ParseResult<&[u8]> {
+ let start: usize = offset.try_into().map_err(|_| ParseError::IndexOutOfRange)?;
+ let size: usize = size.try_into().map_err(|_| ParseError::IndexOutOfRange)?;
+ let end = start.checked_add(size).ok_or(ParseError::IndexOutOfRange)?;
+
+ Ok(&data[start..end])
+}
+
+/// Representation of a complete ELF file.
+#[derive(Debug)]
+pub(crate) struct File<'a> {
+ byteorder: ByteOrder,
+ class: Class,
+ pub type_: u16,
+ pub machine: u16,
+ pub data: &'a [u8],
+ section_headers: SectionInfo<'a>,
+ section_names: StrtabSection<'a>,
+}
+
+impl<'a> File<'a> {
+ pub(crate) fn new_from_bytes(data: &'a [u8]) -> Result<Self, ParseError> {
+ const ELF_MAGIC: [u8; 4] = [
+ bindings::ELFMAG0 as u8,
+ bindings::ELFMAG1 as u8,
+ bindings::ELFMAG2 as u8,
+ bindings::ELFMAG3 as u8,
+ ];
+ let ehdr: bindings::elf32_hdr = read_from_bytes(data)?;
+
+ let magic = [
+ ehdr.e_ident[bindings::EI_MAG0 as usize],
+ ehdr.e_ident[bindings::EI_MAG1 as usize],
+ ehdr.e_ident[bindings::EI_MAG2 as usize],
+ ehdr.e_ident[bindings::EI_MAG3 as usize],
+ ];
+
+ if magic != ELF_MAGIC {
+ return Err(ParseError::InvalidFileMagic(magic));
+ }
+
+ let class = match ehdr.e_ident[bindings::EI_CLASS as usize] as u32 {
+ bindings::ELFCLASS32 => Class::Elf32,
+ bindings::ELFCLASS64 => Class::Elf64,
+ c => return Err(ParseError::InvalidFileClass(c)),
+ };
+
+ let byteorder = match ehdr.e_ident[bindings::EI_DATA as usize] as u32 {
+ bindings::ELFDATA2LSB => ByteOrder::LittleEndian,
+ bindings::ELFDATA2MSB => ByteOrder::BigEndian,
+ b => return Err(ParseError::InvalidFileByteOrder(b)),
+ };
+
+ let (type_, machine, shnum, shoff, shentsize, shstrndx) = match class {
+ Class::Elf32 => {
+ let ehdr: bindings::elf32_hdr = read_from_bytes(data)?;
+ (
+ ehdr.e_type.to_cpu(byteorder),
+ ehdr.e_machine.to_cpu(byteorder),
+ ehdr.e_shnum.to_cpu(byteorder),
+ ehdr.e_shoff.to_cpu(byteorder).into(),
+ ehdr.e_shentsize.to_cpu(byteorder),
+ ehdr.e_shstrndx.to_cpu(byteorder),
+ )
+ }
+ Class::Elf64 => {
+ let ehdr: bindings::elf64_hdr = read_from_bytes(data)?;
+ (
+ ehdr.e_type.to_cpu(byteorder),
+ ehdr.e_machine.to_cpu(byteorder),
+ ehdr.e_shnum.to_cpu(byteorder),
+ ehdr.e_shoff.to_cpu(byteorder),
+ ehdr.e_shentsize.to_cpu(byteorder),
+ ehdr.e_shstrndx.to_cpu(byteorder),
+ )
+ }
+ };
+
+ let section_headers = SectionInfo {
+ byteorder,
+ class,
+ entsize: shentsize.into(),
+ data: get_data_subslice(data, shoff, u64::from(shnum) * u64::from(shentsize))?,
+ name: "<section headers>",
+ };
+
+ let string_table = SectionHeaderIterator::new(§ion_headers, data)?
+ .nth(shstrndx.into())
+ .ok_or(ParseError::MissingStringTable)??;
+
+ let section_names = StrtabSection(SectionInfo {
+ name: "<section header names>",
+ byteorder,
+ class,
+ data: string_table.data,
+ entsize: string_table.entsize,
+ });
+
+ Ok(File {
+ byteorder,
+ class,
+ type_,
+ machine,
+ section_headers,
+ section_names,
+ data,
+ })
+ }
+
+ pub(crate) fn sections(&self) -> ParseResult<SectionIterator<'_>> {
+ Ok(SectionIterator {
+ file: self,
+ section_headers: SectionHeaderIterator::new(&self.section_headers, self.data)?,
+ })
+ }
+}
+
+/// High-level representation of an ELF section.
+#[derive(Clone, Debug)]
+pub(crate) struct SectionInfo<'a> {
+ byteorder: ByteOrder,
+ class: Class,
+ pub name: &'a str,
+ entsize: u64,
+ pub data: &'a [u8],
+}
+
+/// Typed high-level iterator over all sections in a `File`.
+#[derive(Debug)]
+pub(crate) enum Section<'a> {
+ Null(SectionInfo<'a>),
+ Rel(RelSection<'a>),
+ Rela(RelaSection<'a>),
+ Strtab(StrtabSection<'a>),
+ Unknown(SectionInfo<'a>),
+}
+
+impl<'a> Section<'a> {
+ pub(crate) fn info(&'a self) -> &'a SectionInfo<'a> {
+ match self {
+ Section::Null(info) | Section::Unknown(info) => info,
+ Section::Rel(rel) => &rel.0,
+ Section::Rela(rela) => &rela.0,
+ Section::Strtab(strtab) => &strtab.0,
+ }
+ }
+}
+
+pub(crate) struct SectionIterator<'a> {
+ file: &'a File<'a>,
+ section_headers: SectionHeaderIterator<'a, 'a>,
+}
+
+impl<'a> Iterator for SectionIterator<'a> {
+ type Item = ParseResult<Section<'a>>;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.section_headers.next().map(|header| {
+ let header = header?;
+ let info = SectionInfo {
+ byteorder: self.file.byteorder,
+ class: self.file.class,
+ name: self.file.section_names.entry(header.name)?,
+ entsize: header.entsize,
+ data: header.data,
+ };
+
+ Ok(match header.type_ {
+ bindings::SHT_NULL => Section::Null(info),
+ bindings::SHT_RELA => Section::Rela(RelaSection(info)),
+ bindings::SHT_REL => Section::Rel(RelSection(info)),
+ bindings::SHT_STRTAB => Section::Strtab(StrtabSection(info)),
+ _ => Section::Unknown(info),
+ })
+ })
+ }
+}
+
+/// Iterator over a section of data containing instances of type `T`.
+struct SectionEntityIterator<'a, T> {
+ data: &'a [u8],
+ byteorder: ByteOrder,
+ _phantom: std::marker::PhantomData<T>,
+}
+
+impl<'a, T> SectionEntityIterator<'a, T> {
+ const ENTITY_SIZE: usize = std::mem::size_of::<T>();
+
+ fn new(section: &'a SectionInfo<'a>) -> ParseResult<Self> {
+ let data = section.data;
+
+ if section.entsize != Self::ENTITY_SIZE as u64 {
+ Err(ParseError::InvalidSectionSize)
+ } else if data.len().is_multiple_of(Self::ENTITY_SIZE) {
+ Ok(Self {
+ data,
+ byteorder: section.byteorder,
+ _phantom: std::marker::PhantomData,
+ })
+ } else {
+ Err(ParseError::InvalidSectionSize)
+ }
+ }
+}
+
+impl<'a, T> Iterator for SectionEntityIterator<'a, T> {
+ type Item = T;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ if self.data.len() != 0 {
+ let ptr = self.data.as_ptr() as *const T;
+ let entity: T = unsafe { std::ptr::read_unaligned(ptr) };
+ self.data = &self.data[Self::ENTITY_SIZE..];
+ Some(entity)
+ } else {
+ None
+ }
+ }
+}
+
+/// Class-independent representation of an entry in a section header table.
+#[derive(Debug)]
+struct SectionHeader<'a> {
+ name: u32,
+ type_: u32,
+ entsize: u64,
+ data: &'a [u8],
+}
+
+/// Iterator over the section header table.
+struct SectionHeaderIterator<'f: 'a, 'a>(
+ ClassAlternative<
+ SectionEntityIterator<'a, bindings::elf32_shdr>,
+ SectionEntityIterator<'a, bindings::elf64_shdr>,
+ >,
+ &'f [u8],
+);
+
+impl<'f: 'a, 'a> SectionHeaderIterator<'f, 'a> {
+ fn new(section: &'a SectionInfo<'a>, file_data: &'f [u8]) -> ParseResult<Self> {
+ Ok(Self(
+ match section.class {
+ Class::Elf32 => ClassAlternative::Elf32(SectionEntityIterator::new(section)?),
+ Class::Elf64 => ClassAlternative::Elf64(SectionEntityIterator::new(section)?),
+ },
+ file_data,
+ ))
+ }
+}
+
+impl<'f: 'a, 'a> Iterator for SectionHeaderIterator<'f, 'a> {
+ type Item = ParseResult<SectionHeader<'f>>;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ let file_data = self.1;
+
+ match &mut self.0 {
+ ClassAlternative::Elf32(iter) => iter.next().map(|n| {
+ Ok(SectionHeader {
+ name: n.sh_name.to_cpu(iter.byteorder).into(),
+ type_: n.sh_type.to_cpu(iter.byteorder).into(),
+ entsize: n.sh_entsize.to_cpu(iter.byteorder).into(),
+ data: get_data_subslice(
+ file_data,
+ n.sh_offset.to_cpu(iter.byteorder).into(),
+ n.sh_size.to_cpu(iter.byteorder).into(),
+ )?,
+ })
+ }),
+ ClassAlternative::Elf64(iter) => iter.next().map(|n| {
+ Ok(SectionHeader {
+ name: n.sh_name.to_cpu(iter.byteorder).into(),
+ type_: n.sh_type.to_cpu(iter.byteorder).into(),
+ entsize: n.sh_entsize.to_cpu(iter.byteorder).into(),
+ data: get_data_subslice(
+ file_data,
+ n.sh_offset.to_cpu(iter.byteorder).into(),
+ n.sh_size.to_cpu(iter.byteorder).into(),
+ )?,
+ })
+ }),
+ }
+ }
+}
+
+/// High-level interface to a SHT_STRTAB string table.
+#[derive(Debug)]
+pub(crate) struct StrtabSection<'a>(SectionInfo<'a>);
+
+impl<'a> StrtabSection<'a> {
+ pub(crate) fn entry(&'a self, index: u32) -> ParseResult<&'a str> {
+ let data = self.0.data;
+ let index = index as usize;
+
+ if index >= data.len() {
+ Err(ParseError::StrtabIndexOutOfRange)
+ } else {
+ let len = data[index..]
+ .iter()
+ .position(|b| *b == 0x00)
+ .ok_or(ParseError::StrtabIndexOutOfRange)?;
+ let s = std::str::from_utf8(&data[index..index + len])
+ .map_err(|e| ParseError::StrtabInvalidData(e))?;
+ Ok(s)
+ }
+ }
+}
+
+/// High-level interface to a SHT_REL relocation table.
+#[derive(Debug)]
+pub(crate) struct RelSection<'a>(SectionInfo<'a>);
+
+impl<'a> RelSection<'a> {
+ pub(crate) fn entries(&'a self) -> ParseResult<RelSectionIterator<'a>> {
+ RelSectionIterator::new(&self.0)
+ }
+}
+
+#[derive(Debug)]
+pub(crate) struct Rel {
+ pub type_: u32,
+}
+
+pub(crate) struct RelSectionIterator<'a>(
+ ClassAlternative<
+ SectionEntityIterator<'a, bindings::elf32_rel>,
+ SectionEntityIterator<'a, bindings::elf64_rel>,
+ >,
+);
+
+impl<'a> RelSectionIterator<'a> {
+ fn new(section: &'a SectionInfo<'a>) -> ParseResult<Self> {
+ Ok(Self(match section.class {
+ Class::Elf32 => ClassAlternative::Elf32(SectionEntityIterator::new(section)?),
+ Class::Elf64 => ClassAlternative::Elf64(SectionEntityIterator::new(section)?),
+ }))
+ }
+}
+
+impl<'a> Iterator for RelSectionIterator<'a> {
+ type Item = Rel;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ match &mut self.0 {
+ ClassAlternative::Elf32(iter) => iter.next().map(|n| {
+ let type_ = n.r_info.to_cpu(iter.byteorder) & 0xff;
+ Self::Item { type_ }
+ }),
+ ClassAlternative::Elf64(iter) => iter.next().map(|n| {
+ let type_ = n.r_info.to_cpu(iter.byteorder) as u32;
+ Self::Item { type_ }
+ }),
+ }
+ }
+}
+
+/// High-level interface to a SHT_RELA relocation table.
+#[derive(Debug)]
+pub(crate) struct RelaSection<'a>(SectionInfo<'a>);
+
+impl<'a> RelaSection<'a> {
+ pub(crate) fn entries(&'a self) -> ParseResult<RelaSectionIterator<'a>> {
+ RelaSectionIterator::new(&self.0)
+ }
+}
+
+#[derive(Debug)]
+pub(crate) struct Rela {
+ pub type_: u32,
+}
+
+pub(crate) struct RelaSectionIterator<'a>(
+ ClassAlternative<
+ SectionEntityIterator<'a, bindings::elf32_rela>,
+ SectionEntityIterator<'a, bindings::elf64_rela>,
+ >,
+);
+
+impl<'a> RelaSectionIterator<'a> {
+ fn new(section: &'a SectionInfo<'a>) -> ParseResult<Self> {
+ Ok(Self(match section.class {
+ Class::Elf32 => ClassAlternative::Elf32(SectionEntityIterator::new(section)?),
+ Class::Elf64 => ClassAlternative::Elf64(SectionEntityIterator::new(section)?),
+ }))
+ }
+}
+
+impl<'a> Iterator for RelaSectionIterator<'a> {
+ type Item = Rela;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ match &mut self.0 {
+ ClassAlternative::Elf32(iter) => iter.next().map(|n| {
+ let type_ = n.r_info.to_cpu(iter.byteorder) & 0xff;
+ Self::Item { type_ }
+ }),
+ ClassAlternative::Elf64(iter) => iter.next().map(|n| {
+ let type_ = n.r_info.to_cpu(iter.byteorder) as u32;
+ Self::Item { type_ }
+ }),
+ }
+ }
+}
diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs
new file mode 100644
index 0000000000000000000000000000000000000000..3c421100a91740ce3735edfbc9837ef49f55d8f8
--- /dev/null
+++ b/lib/vdso/check/vdsocheck.rs
@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! vDSO build-time validation
+//!
+//! Check that the vDSO library does not contain dynamic relocations.
+
+use std::fmt;
+use std::fs;
+use std::option::Option;
+use std::process;
+
+use ::bindings;
+
+mod elf;
+
+struct AllowedRelocations<'a> {
+ ignored_object_file_sections: Option<&'a [&'a str]>,
+ in_object_file: &'a [u32],
+}
+
+impl<'a> AllowedRelocations<'a> {
+ fn is_ignored_section(&self, section: &elf::Section<'_>) -> bool {
+ let name = section.info().name;
+
+ if name.starts_with(".rel.debug_") || name.starts_with(".rela.debug_") {
+ true
+ } else if let Some(ignored_object_file_sections) = self.ignored_object_file_sections {
+ ignored_object_file_sections.contains(&name)
+ } else {
+ false
+ }
+ }
+}
+
+fn allowed_relocations_for_machine(machine: u16) -> Option<AllowedRelocations<'static>> {
+ match machine as u32 {
+ _ => None,
+ }
+}
+
+#[derive(Debug)]
+enum ValidationError<'a> {
+ ParseError(elf::ParseError),
+ UnsupportedArchitecture(u16),
+ UnrecognizedElfFileType(u32),
+ UnexpectedSection(elf::Section<'a>),
+ InvalidRelocation(elf::Section<'a>, u32),
+}
+
+impl<'a> From<elf::ParseError> for ValidationError<'a> {
+ fn from(parse_error: elf::ParseError) -> Self {
+ Self::ParseError(parse_error)
+ }
+}
+
+impl fmt::Display for ValidationError<'_> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ match self {
+ ValidationError::ParseError(e) => write!(f, "Parsing error: {}", e),
+ ValidationError::UnsupportedArchitecture(n) => {
+ write!(f, "Unsupported ELF architecture {}", n)
+ }
+ ValidationError::UnrecognizedElfFileType(t) => {
+ write!(f, "Unrecognized ELF file type {}", t)
+ }
+ ValidationError::UnexpectedSection(ref s) => {
+ write!(f, "Unexpected section '{}'", s.info().name)
+ }
+ ValidationError::InvalidRelocation(ref s, t) => {
+ write!(f, "Invalid relocation {} in section '{}'", t, s.info().name)
+ }
+ }
+ }
+}
+
+type ValidationResult<'a> = Result<(), ValidationError<'a>>;
+
+fn validate_linked_dso<'a>(file: &'a elf::File<'a>) -> ValidationResult<'a> {
+ for section in file.sections()? {
+ let section = section?;
+
+ /* No relocations are allowed */
+ match section {
+ elf::Section::Rel(_) | elf::Section::Rela(_) => {
+ return Err(ValidationError::UnexpectedSection(section))
+ }
+ _ => {}
+ }
+ }
+
+ Ok(())
+}
+
+fn validate_object_file<'a>(file: &'a elf::File<'a>) -> ValidationResult<'a> {
+ let allowed_relocs = allowed_relocations_for_machine(file.machine)
+ .ok_or(ValidationError::UnsupportedArchitecture(file.machine))?;
+
+ for section in file.sections()? {
+ let section = section?;
+
+ if allowed_relocs.is_ignored_section(§ion) {
+ continue;
+ }
+
+ match section {
+ elf::Section::Rel(ref rel) => {
+ for entry in rel.entries()? {
+ if !allowed_relocs.in_object_file.contains(&entry.type_) {
+ return Err(ValidationError::InvalidRelocation(section, entry.type_));
+ }
+ }
+ }
+ elf::Section::Rela(ref rela) => {
+ for entry in rela.entries()? {
+ if !allowed_relocs.in_object_file.contains(&entry.type_) {
+ return Err(ValidationError::InvalidRelocation(section, entry.type_));
+ }
+ }
+ }
+ _ => {}
+ };
+ }
+
+ Ok(())
+}
+
+fn main() {
+ let mut args = std::env::args_os();
+
+ let program_name = args.next().unwrap_or("vdsocheck".into());
+
+ for path in args {
+ let data = fs::read(&path).unwrap_or_else(|err| {
+ println!("{}: {}: {}", program_name.display(), path.display(), err);
+ process::exit(1);
+ });
+
+ let file = elf::File::new_from_bytes(&data).unwrap_or_else(|err| {
+ println!("{}: {}: {}", program_name.display(), path.display(), err);
+ process::exit(2);
+ });
+
+ let result = match file.type_ as u32 {
+ bindings::ET_DYN => validate_linked_dso(&file),
+ bindings::ET_REL => validate_object_file(&file),
+ t => Err(ValidationError::UnrecognizedElfFileType(t)),
+ };
+
+ result.unwrap_or_else(|err| {
+ println!("{}: {}: {}", program_name.display(), path.display(), err);
+ process::exit(3);
+ });
+ }
+}
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 12/24] x86/vdso: Enable the vdsocheck tool
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (10 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 11/24] vdso: Add the vdsocheck tool Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 13/24] ARM: vdso: " Thomas Weißschuh
` (13 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
The vdsocheck tool validates the object files and final .so library.
It can detect if the compiler created relocations which are incompatible
with the vDSO which need to be worked around.
Wire it up for the architecture.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/x86/entry/vdso/Makefile | 6 +++---
lib/vdso/Kconfig | 1 +
lib/vdso/check/vdsocheck.rs | 12 ++++++++++++
3 files changed, 16 insertions(+), 3 deletions(-)
diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index f247f5f5cb44dad706701dd5344c9a8031deffc1..9da9cdf8c976ccebac1429afd244d4c9ea6ef5fa 100644
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -35,7 +35,7 @@ CPPFLAGS_vdso.lds += -P -C
VDSO_LDFLAGS_vdso.lds = -m elf_x86_64 -soname linux-vdso.so.1 \
-z max-page-size=4096
-$(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
+$(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) $(vdsocheck) FORCE
$(call if_changed,vdso_and_check)
HOST_EXTRACFLAGS += -I$(srctree)/tools/include -I$(srctree)/include/uapi -I$(srctree)/arch/$(SUBARCH)/include/uapi
@@ -108,7 +108,7 @@ $(obj)/%.so: OBJCOPYFLAGS := -S --remove-section __ex_table
$(obj)/%.so: $(obj)/%.so.dbg FORCE
$(call if_changed,objcopy)
-$(obj)/vdsox32.so.dbg: $(obj)/vdsox32.lds $(vobjx32s) FORCE
+$(obj)/vdsox32.so.dbg: $(obj)/vdsox32.lds $(vobjx32s) $(vdsocheck) FORCE
$(call if_changed,vdso_and_check)
CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.lds)
@@ -144,7 +144,7 @@ endif
$(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
-$(obj)/vdso32.so.dbg: $(obj)/vdso32/vdso32.lds $(vobjs32) FORCE
+$(obj)/vdso32.so.dbg: $(obj)/vdso32/vdso32.lds $(vobjs32) $(vdsocheck) FORCE
$(call if_changed,vdso_and_check)
#
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index b461e2be6db80eae957c8e0a1ab573a85d78fd15..e9215084462dfb33a5cd55a57171d2ec4295a270 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -51,6 +51,7 @@ config GENERIC_VDSO_DATA_STORE
config HAVE_VDSOCHECK
bool
+ default y if X86
help
Selected for architectures that are supported by the 'vdsocheck' progam.
Only transitional.
diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs
index 3c421100a91740ce3735edfbc9837ef49f55d8f8..c4feb75f93ec0a6a153a758ee7a51cc6f2f58bf1 100644
--- a/lib/vdso/check/vdsocheck.rs
+++ b/lib/vdso/check/vdsocheck.rs
@@ -34,6 +34,18 @@ fn is_ignored_section(&self, section: &elf::Section<'_>) -> bool {
fn allowed_relocations_for_machine(machine: u16) -> Option<AllowedRelocations<'static>> {
match machine as u32 {
+ bindings::EM_386 => Some(AllowedRelocations {
+ ignored_object_file_sections: None,
+ in_object_file: &[
+ bindings::R_386_PC32,
+ bindings::R_386_GOTOFF,
+ bindings::R_386_GOTPC,
+ ],
+ }),
+ bindings::EM_X86_64 => Some(AllowedRelocations {
+ ignored_object_file_sections: None,
+ in_object_file: &[bindings::R_X86_64_PC32, bindings::R_X86_64_PLT32],
+ }),
_ => None,
}
}
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 13/24] ARM: vdso: Enable the vdsocheck tool
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (11 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 12/24] x86/vdso: Enable " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 14/24] arm64: " Thomas Weißschuh
` (12 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
The vdsocheck tool validates the object files and final .so library.
It can detect if the compiler created relocations which are incompatible
with the vDSO which need to be worked around.
Wire it up for the architecture.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/arm/vdso/Makefile | 4 ++--
lib/vdso/Kconfig | 1 +
lib/vdso/check/vdsocheck.rs | 8 ++++++++
3 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
index cf8cd39ab80468bf1409172a8b857d050b224004..fd34d0ff018a8afa5bfebb62f69bba964c6e73a3 100644
--- a/arch/arm/vdso/Makefile
+++ b/arch/arm/vdso/Makefile
@@ -37,7 +37,7 @@ endif
$(obj)/vdso.o : $(obj)/vdso.so
# Link rule for the .so file
-$(obj)/vdso.so.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
+$(obj)/vdso.so.raw: $(obj)/vdso.lds $(obj-vdso) $(vdsocheck) FORCE
$(call if_changed,vdsold_and_vdso_check)
$(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/vdsomunge FORCE
@@ -50,7 +50,7 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE
# Actual build commands
quiet_cmd_vdsold_and_vdso_check = LD $@
- cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check)
+ cmd_vdsold_and_vdso_check = $(cmd_ld_vdso); $(cmd_vdso_check)
quiet_cmd_vdsomunge = MUNGE $@
cmd_vdsomunge = $(objtree)/$(obj)/vdsomunge $< $@
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index e9215084462dfb33a5cd55a57171d2ec4295a270..84bff59ccef4acd95159d03e96991161a029fb2d 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -52,6 +52,7 @@ config GENERIC_VDSO_DATA_STORE
config HAVE_VDSOCHECK
bool
default y if X86
+ default y if ARM
help
Selected for architectures that are supported by the 'vdsocheck' progam.
Only transitional.
diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs
index c4feb75f93ec0a6a153a758ee7a51cc6f2f58bf1..23970b9d05dc320eb4966967904deae661171b15 100644
--- a/lib/vdso/check/vdsocheck.rs
+++ b/lib/vdso/check/vdsocheck.rs
@@ -46,6 +46,14 @@ fn allowed_relocations_for_machine(machine: u16) -> Option<AllowedRelocations<'s
ignored_object_file_sections: None,
in_object_file: &[bindings::R_X86_64_PC32, bindings::R_X86_64_PLT32],
}),
+ bindings::EM_ARM => Some(AllowedRelocations {
+ ignored_object_file_sections: None,
+ in_object_file: &[
+ bindings::R_ARM_NONE,
+ bindings::R_ARM_REL32,
+ bindings::R_ARM_PREL31,
+ ],
+ }),
_ => None,
}
}
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 14/24] arm64: vdso: Enable the vdsocheck tool
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (12 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 13/24] ARM: vdso: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 15/24] powerpc/elf: Add 32-bit REL16 relocation definitions Thomas Weißschuh
` (11 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
The vdsocheck tool validates the object files and final .so library.
It can detect if the compiler created relocations which are incompatible
with the vDSO which need to be worked around.
Wire it up for the architecture.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/arm64/kernel/vdso/Makefile | 4 ++--
lib/vdso/Kconfig | 1 +
lib/vdso/check/vdsocheck.rs | 11 +++++++++++
3 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
index 7dec05dd33b70ea8fc734e0c13af9ec4568d80a8..9fac0e54097dc552dbfe81074da71492c79c9230 100644
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -61,7 +61,7 @@ targets += vdso.lds
CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
# Link rule for the .so file, .lds has to be first
-$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
+$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) $(vdsocheck) FORCE
$(call if_changed,vdsold_and_vdso_check)
# Strip rule for the .so file
@@ -79,4 +79,4 @@ include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
# Actual build commands
quiet_cmd_vdsold_and_vdso_check = LD $@
- cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check)
+ cmd_vdsold_and_vdso_check = $(cmd_ld_vdso); $(cmd_vdso_check)
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index 84bff59ccef4acd95159d03e96991161a029fb2d..3037b15476bb60ee47c1e083eae3968ab9604f59 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -53,6 +53,7 @@ config HAVE_VDSOCHECK
bool
default y if X86
default y if ARM
+ default y if ARM64
help
Selected for architectures that are supported by the 'vdsocheck' progam.
Only transitional.
diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs
index 23970b9d05dc320eb4966967904deae661171b15..a695aed95ad391a0c55e5388bc6d1f1141fd784e 100644
--- a/lib/vdso/check/vdsocheck.rs
+++ b/lib/vdso/check/vdsocheck.rs
@@ -54,6 +54,17 @@ fn allowed_relocations_for_machine(machine: u16) -> Option<AllowedRelocations<'s
bindings::R_ARM_PREL31,
],
}),
+ bindings::EM_AARCH64 => Some(AllowedRelocations {
+ ignored_object_file_sections: None,
+ in_object_file: &[
+ bindings::R_AARCH64_PREL64,
+ bindings::R_AARCH64_PREL32,
+ bindings::R_AARCH64_PREL16,
+ bindings::R_AARCH64_LD_PREL_LO19,
+ bindings::R_AARCH64_ADR_PREL_LO21,
+ bindings::R_AARCH64_CALL26,
+ ],
+ }),
_ => None,
}
}
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 15/24] powerpc/elf: Add 32-bit REL16 relocation definitions
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (13 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 14/24] arm64: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 16/24] powerpc/vdso: Enable the vdsocheck tool Thomas Weißschuh
` (10 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These are used by userspace and are necessary for the vdsocheck tool.
They share the numbers with their 64-bit variants.
Also update the copy in tools/ so they can be used by vdsocheck.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
include/uapi/linux/elf-r.h | 7 ++++++-
tools/include/uapi/linux/elf-r.h | 7 ++++++-
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index 78085d26f4ab27a003fde65c8e981f575f411758..e750989e44e8f517d7dacf9d3a338af7a136e40f 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -182,8 +182,13 @@
#define R_PPC_GOT_DTPREL16_HI 93 /* half16* (sym+add)@got@dtprel@h */
#define R_PPC_GOT_DTPREL16_HA 94 /* half16* (sym+add)@got@dtprel@ha */
+#define R_PPC_REL16 249
+#define R_PPC_REL16_LO 250
+#define R_PPC_REL16_HI 251
+#define R_PPC_REL16_HA 252
+
/* keep this the last entry. */
-#define R_PPC_NUM 95
+#define R_PPC_NUM 253
/* PowerPC64 relocations defined by the ABIs */
#define R_PPC64_NONE R_PPC_NONE
diff --git a/tools/include/uapi/linux/elf-r.h b/tools/include/uapi/linux/elf-r.h
index 78085d26f4ab27a003fde65c8e981f575f411758..e750989e44e8f517d7dacf9d3a338af7a136e40f 100644
--- a/tools/include/uapi/linux/elf-r.h
+++ b/tools/include/uapi/linux/elf-r.h
@@ -182,8 +182,13 @@
#define R_PPC_GOT_DTPREL16_HI 93 /* half16* (sym+add)@got@dtprel@h */
#define R_PPC_GOT_DTPREL16_HA 94 /* half16* (sym+add)@got@dtprel@ha */
+#define R_PPC_REL16 249
+#define R_PPC_REL16_LO 250
+#define R_PPC_REL16_HI 251
+#define R_PPC_REL16_HA 252
+
/* keep this the last entry. */
-#define R_PPC_NUM 95
+#define R_PPC_NUM 253
/* PowerPC64 relocations defined by the ABIs */
#define R_PPC64_NONE R_PPC_NONE
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 16/24] powerpc/vdso: Enable the vdsocheck tool
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (14 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 15/24] powerpc/elf: Add 32-bit REL16 relocation definitions Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 17/24] riscv: vdso: Deduplicate CFLAGS_REMOVE_* variables Thomas Weißschuh
` (9 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
The vdsocheck tool validates the object files and final .so library.
It can detect if the compiler created relocations which are incompatible
with the vDSO which need to be worked around.
Wire it up for the architecture.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/powerpc/kernel/vdso/Makefile | 4 ++--
lib/vdso/Kconfig | 1 +
lib/vdso/check/vdsocheck.rs | 25 +++++++++++++++++++++++++
3 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/vdso/Makefile b/arch/powerpc/kernel/vdso/Makefile
index 8834dfe9d72796c8f1e20b84ebcb33a6b74b82f0..193af6877eba25898aeaf55a04cd834f7a2eb753 100644
--- a/arch/powerpc/kernel/vdso/Makefile
+++ b/arch/powerpc/kernel/vdso/Makefile
@@ -75,9 +75,9 @@ targets += vdso64.lds
CPPFLAGS_vdso64.lds += -P -C
# link rule for the .so file, .lds has to be first
-$(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday-32.o $(obj)/vgetrandom-32.o $(obj)/crtsavres-32.o FORCE
+$(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday-32.o $(obj)/vgetrandom-32.o $(obj)/crtsavres-32.o $(vdsocheck) FORCE
$(call if_changed,vdso32ld_and_check)
-$(obj)/vdso64.so.dbg: $(obj)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday-64.o $(obj)/vgetrandom-64.o FORCE
+$(obj)/vdso64.so.dbg: $(obj)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday-64.o $(obj)/vgetrandom-64.o $(vdsocheck) FORCE
$(call if_changed,vdso64ld_and_check)
# assembly rules for the .S files
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index 3037b15476bb60ee47c1e083eae3968ab9604f59..8994419d90e7b5c66ac77449b6c3bd96c968983d 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -54,6 +54,7 @@ config HAVE_VDSOCHECK
default y if X86
default y if ARM
default y if ARM64
+ default y if PPC
help
Selected for architectures that are supported by the 'vdsocheck' progam.
Only transitional.
diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs
index a695aed95ad391a0c55e5388bc6d1f1141fd784e..54372a547b1cde05c1a4454b9a21de357b22b0df 100644
--- a/lib/vdso/check/vdsocheck.rs
+++ b/lib/vdso/check/vdsocheck.rs
@@ -65,6 +65,31 @@ fn allowed_relocations_for_machine(machine: u16) -> Option<AllowedRelocations<'s
bindings::R_AARCH64_CALL26,
],
}),
+ bindings::EM_PPC => Some(AllowedRelocations {
+ ignored_object_file_sections: None,
+ in_object_file: &[
+ bindings::R_PPC_REL24,
+ bindings::R_PPC_REL14,
+ bindings::R_PPC_REL32,
+ bindings::R_PPC_REL16,
+ bindings::R_PPC_REL16_LO,
+ bindings::R_PPC_REL16_HI,
+ bindings::R_PPC_REL16_HA,
+ ],
+ }),
+ bindings::EM_PPC64 => Some(AllowedRelocations {
+ ignored_object_file_sections: None,
+ in_object_file: &[
+ bindings::R_PPC64_REL24,
+ bindings::R_PPC64_REL14,
+ bindings::R_PPC64_REL32,
+ bindings::R_PPC64_REL64,
+ bindings::R_PPC64_REL16,
+ bindings::R_PPC64_REL16_LO,
+ bindings::R_PPC64_REL16_HI,
+ bindings::R_PPC64_REL16_HA,
+ ],
+ }),
_ => None,
}
}
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 17/24] riscv: vdso: Deduplicate CFLAGS_REMOVE_* variables
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (15 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 16/24] powerpc/vdso: Enable the vdsocheck tool Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-15 15:07 ` Palmer Dabbelt
2025-08-12 5:44 ` [PATCH v4 18/24] riscv: vdso: Disable LTO for the vDSO Thomas Weißschuh
` (8 subsequent siblings)
25 siblings, 1 reply; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
All vDSO objects need the same treatment.
To make changes to both the list of objects and the list of removed flags
easier, introduce a helper variable.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Jan Stancek <jstancek@redhat.com>
---
arch/riscv/kernel/vdso/Makefile | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
index 9ebb5e590f93a3228c451dca58e6d5cfbbc03ff7..c19c3c76f7c9f6b2f7523a59269de3b683656323 100644
--- a/arch/riscv/kernel/vdso/Makefile
+++ b/arch/riscv/kernel/vdso/Makefile
@@ -49,9 +49,10 @@ CPPFLAGS_vdso.lds += -DHAS_VGETTIMEOFDAY
endif
# Disable -pg to prevent insert call site
-CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
-CFLAGS_REMOVE_getrandom.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
-CFLAGS_REMOVE_hwprobe.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
+CFLAGS_REMOVE_VDSO = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
+CFLAGS_REMOVE_vgettimeofday.o = $(CFLAGS_REMOVE_VDSO)
+CFLAGS_REMOVE_getrandom.o = $(CFLAGS_REMOVE_VDSO)
+CFLAGS_REMOVE_hwprobe.o = $(CFLAGS_REMOVE_VDSO)
# Force dependency
$(obj)/vdso.o: $(obj)/vdso.so
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH v4 17/24] riscv: vdso: Deduplicate CFLAGS_REMOVE_* variables
2025-08-12 5:44 ` [PATCH v4 17/24] riscv: vdso: Deduplicate CFLAGS_REMOVE_* variables Thomas Weißschuh
@ 2025-08-15 15:07 ` Palmer Dabbelt
0 siblings, 0 replies; 32+ messages in thread
From: Palmer Dabbelt @ 2025-08-15 15:07 UTC (permalink / raw)
To: thomas.weissschuh
Cc: Paul Walmsley, aou, Alexandre Ghiti, nathan,
nick.desaulniers+lkml, morbo, justinstitt, luto, tglx,
vincenzo.frascino, kees, mingo, bp, dave.hansen, x86, hpa,
richard, anton.ivanov, johannes, linux, Catalin Marinas,
Will Deacon, maddy, mpe, npiggin, christophe.leroy, chenhuacai,
kernel, hca, gor, agordeev, borntraeger, svens, tsbogend, ojeda,
alex.gaynor, boqun.feng, gary, bjorn3_gh, lossin, a.hindborg,
aliceryhl, tmgross, dakr, nicolas.schier, linux-riscv,
linux-kernel, llvm, linux-mm, linux-um, linux-arm-kernel,
linuxppc-dev, loongarch, linux-s390, linux-mips, rust-for-linux,
linux-kbuild, jstancek, acme, alexghiti, thomas.weissschuh
On Mon, 11 Aug 2025 22:44:30 PDT (-0700), thomas.weissschuh@linutronix.de wrote:
> All vDSO objects need the same treatment.
> To make changes to both the list of objects and the list of removed flags
> easier, introduce a helper variable.
>
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
> Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> Tested-by: Jan Stancek <jstancek@redhat.com>
> ---
> arch/riscv/kernel/vdso/Makefile | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
> index 9ebb5e590f93a3228c451dca58e6d5cfbbc03ff7..c19c3c76f7c9f6b2f7523a59269de3b683656323 100644
> --- a/arch/riscv/kernel/vdso/Makefile
> +++ b/arch/riscv/kernel/vdso/Makefile
> @@ -49,9 +49,10 @@ CPPFLAGS_vdso.lds += -DHAS_VGETTIMEOFDAY
> endif
>
> # Disable -pg to prevent insert call site
> -CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
> -CFLAGS_REMOVE_getrandom.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
> -CFLAGS_REMOVE_hwprobe.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
> +CFLAGS_REMOVE_VDSO = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
> +CFLAGS_REMOVE_vgettimeofday.o = $(CFLAGS_REMOVE_VDSO)
> +CFLAGS_REMOVE_getrandom.o = $(CFLAGS_REMOVE_VDSO)
> +CFLAGS_REMOVE_hwprobe.o = $(CFLAGS_REMOVE_VDSO)
>
> # Force dependency
> $(obj)/vdso.o: $(obj)/vdso.so
Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com>
Acked-by: Palmer Dabbelt <palmer@dabbelt.com>
Also assuming you want to take this with the others.
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v4 18/24] riscv: vdso: Disable LTO for the vDSO
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (16 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 17/24] riscv: vdso: Deduplicate CFLAGS_REMOVE_* variables Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-15 15:07 ` Palmer Dabbelt
2025-08-12 5:44 ` [PATCH v4 19/24] riscv: vdso: Enable the vdsocheck tool Thomas Weißschuh
` (7 subsequent siblings)
25 siblings, 1 reply; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
All the other architectures supporting LTO (x86, arm64, loongarch) do not
use it for the vDSO.
Its is problematic for some upcoming compile-time validation of the
generated object code.
The LTO object files do not contain the necessary relocation information
and -flto-fat-objects is not compatible with clang < 16.
For consistency and to enable the mentioned compile-time checks,
disable LTO for the vDSO.
The vDSO heavily uses __always_inline anyways.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Jan Stancek <jstancek@redhat.com>
---
arch/riscv/kernel/vdso/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
index c19c3c76f7c9f6b2f7523a59269de3b683656323..9f1bf5bae9bd473e43d9fd3022e9e1a185128b73 100644
--- a/arch/riscv/kernel/vdso/Makefile
+++ b/arch/riscv/kernel/vdso/Makefile
@@ -49,7 +49,7 @@ CPPFLAGS_vdso.lds += -DHAS_VGETTIMEOFDAY
endif
# Disable -pg to prevent insert call site
-CFLAGS_REMOVE_VDSO = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
+CFLAGS_REMOVE_VDSO = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_LTO)
CFLAGS_REMOVE_vgettimeofday.o = $(CFLAGS_REMOVE_VDSO)
CFLAGS_REMOVE_getrandom.o = $(CFLAGS_REMOVE_VDSO)
CFLAGS_REMOVE_hwprobe.o = $(CFLAGS_REMOVE_VDSO)
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH v4 18/24] riscv: vdso: Disable LTO for the vDSO
2025-08-12 5:44 ` [PATCH v4 18/24] riscv: vdso: Disable LTO for the vDSO Thomas Weißschuh
@ 2025-08-15 15:07 ` Palmer Dabbelt
0 siblings, 0 replies; 32+ messages in thread
From: Palmer Dabbelt @ 2025-08-15 15:07 UTC (permalink / raw)
To: thomas.weissschuh
Cc: Paul Walmsley, aou, Alexandre Ghiti, nathan,
nick.desaulniers+lkml, morbo, justinstitt, luto, tglx,
vincenzo.frascino, kees, mingo, bp, dave.hansen, x86, hpa,
richard, anton.ivanov, johannes, linux, Catalin Marinas,
Will Deacon, maddy, mpe, npiggin, christophe.leroy, chenhuacai,
kernel, hca, gor, agordeev, borntraeger, svens, tsbogend, ojeda,
alex.gaynor, boqun.feng, gary, bjorn3_gh, lossin, a.hindborg,
aliceryhl, tmgross, dakr, nicolas.schier, linux-riscv,
linux-kernel, llvm, linux-mm, linux-um, linux-arm-kernel,
linuxppc-dev, loongarch, linux-s390, linux-mips, rust-for-linux,
linux-kbuild, jstancek, acme, alexghiti, thomas.weissschuh
On Mon, 11 Aug 2025 22:44:31 PDT (-0700), thomas.weissschuh@linutronix.de wrote:
> All the other architectures supporting LTO (x86, arm64, loongarch) do not
> use it for the vDSO.
>
> Its is problematic for some upcoming compile-time validation of the
> generated object code.
> The LTO object files do not contain the necessary relocation information
> and -flto-fat-objects is not compatible with clang < 16.
>
> For consistency and to enable the mentioned compile-time checks,
> disable LTO for the vDSO.
> The vDSO heavily uses __always_inline anyways.
>
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
> Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> Tested-by: Jan Stancek <jstancek@redhat.com>
> ---
> arch/riscv/kernel/vdso/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
> index c19c3c76f7c9f6b2f7523a59269de3b683656323..9f1bf5bae9bd473e43d9fd3022e9e1a185128b73 100644
> --- a/arch/riscv/kernel/vdso/Makefile
> +++ b/arch/riscv/kernel/vdso/Makefile
> @@ -49,7 +49,7 @@ CPPFLAGS_vdso.lds += -DHAS_VGETTIMEOFDAY
> endif
>
> # Disable -pg to prevent insert call site
> -CFLAGS_REMOVE_VDSO = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
> +CFLAGS_REMOVE_VDSO = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_LTO)
> CFLAGS_REMOVE_vgettimeofday.o = $(CFLAGS_REMOVE_VDSO)
> CFLAGS_REMOVE_getrandom.o = $(CFLAGS_REMOVE_VDSO)
> CFLAGS_REMOVE_hwprobe.o = $(CFLAGS_REMOVE_VDSO)
Acked-by: Palmer Dabbelt <palmer@dabbelt.com>
Also assuming this goes with the others. Thanks!
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v4 19/24] riscv: vdso: Enable the vdsocheck tool
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (17 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 18/24] riscv: vdso: Disable LTO for the vDSO Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 20/24] LoongArch: vDSO: " Thomas Weißschuh
` (6 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
The vdsocheck tool validates the object files and final .so library.
It can detect if the compiler created relocations which are incompatible
with the vDSO which need to be worked around.
Wire it up for the architecture.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/riscv/kernel/vdso/Makefile | 4 ++--
lib/vdso/Kconfig | 1 +
lib/vdso/check/vdsocheck.rs | 25 +++++++++++++++++++++++++
3 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
index 9f1bf5bae9bd473e43d9fd3022e9e1a185128b73..05725a72eaca70a867f59c352a6381402e91c317 100644
--- a/arch/riscv/kernel/vdso/Makefile
+++ b/arch/riscv/kernel/vdso/Makefile
@@ -58,7 +58,7 @@ CFLAGS_REMOVE_hwprobe.o = $(CFLAGS_REMOVE_VDSO)
$(obj)/vdso.o: $(obj)/vdso.so
# link rule for the .so file, .lds has to be first
-$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
+$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) $(vdsocheck) FORCE
$(call if_changed,vdsold_and_check)
LDFLAGS_vdso.so.dbg = -shared -soname=linux-vdso.so.1 \
--build-id=sha1 --eh-frame-hdr
@@ -80,7 +80,7 @@ include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
# The DSO images are built using a special linker script
# Make sure only to export the intended __vdso_xxx symbol offsets.
quiet_cmd_vdsold_and_check = VDSOLD $@
- cmd_vdsold_and_check = $(LD) $(ld_flags) -T $(filter-out FORCE,$^) -o $@.tmp && \
+ cmd_vdsold_and_check = $(LD) $(ld_flags) -T $(filter-out FORCE $(vdsocheck),$^) -o $@.tmp && \
$(OBJCOPY) $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ && \
rm $@.tmp && \
$(cmd_vdso_check)
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index 8994419d90e7b5c66ac77449b6c3bd96c968983d..441ff03e1028f7bde5104bd01941c6a9b006e21f 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -55,6 +55,7 @@ config HAVE_VDSOCHECK
default y if ARM
default y if ARM64
default y if PPC
+ default y if RISCV
help
Selected for architectures that are supported by the 'vdsocheck' progam.
Only transitional.
diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs
index 54372a547b1cde05c1a4454b9a21de357b22b0df..d48c9da6f18270afe883d167955f73f061b9c472 100644
--- a/lib/vdso/check/vdsocheck.rs
+++ b/lib/vdso/check/vdsocheck.rs
@@ -90,6 +90,31 @@ fn allowed_relocations_for_machine(machine: u16) -> Option<AllowedRelocations<'s
bindings::R_PPC64_REL16_HA,
],
}),
+ bindings::EM_RISCV => Some(AllowedRelocations {
+ ignored_object_file_sections: None,
+ in_object_file: &[
+ bindings::R_RISCV_BRANCH,
+ bindings::R_RISCV_JAL,
+ bindings::R_RISCV_CALL,
+ bindings::R_RISCV_CALL_PLT,
+ bindings::R_RISCV_PCREL_HI20,
+ bindings::R_RISCV_PCREL_LO12_I,
+ bindings::R_RISCV_PCREL_LO12_S,
+ bindings::R_RISCV_ADD8,
+ bindings::R_RISCV_ADD16,
+ bindings::R_RISCV_ADD32,
+ bindings::R_RISCV_ADD64,
+ bindings::R_RISCV_SUB8,
+ bindings::R_RISCV_SUB16,
+ bindings::R_RISCV_SUB32,
+ bindings::R_RISCV_SUB64,
+ bindings::R_RISCV_ALIGN,
+ bindings::R_RISCV_RVC_BRANCH,
+ bindings::R_RISCV_RVC_JUMP,
+ bindings::R_RISCV_RELAX,
+ bindings::R_RISCV_32_PCREL,
+ ],
+ }),
_ => None,
}
}
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 20/24] LoongArch: vDSO: Enable the vdsocheck tool
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (18 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 19/24] riscv: vdso: Enable the vdsocheck tool Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 21/24] s390/vdso: " Thomas Weißschuh
` (5 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
The vdsocheck tool validates the object files and final .so library.
It can detect if the compiler created relocations which are incompatible
with the vDSO which need to be worked around.
Wire it up for the architecture.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/loongarch/vdso/Makefile | 4 ++--
lib/vdso/Kconfig | 1 +
lib/vdso/check/vdsocheck.rs | 23 +++++++++++++++++++++++
3 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/arch/loongarch/vdso/Makefile b/arch/loongarch/vdso/Makefile
index d8316f993482406c2633b49b1daa475fc415a82c..a9b1934dce7c821df96e636a9833e70f22ee1b31 100644
--- a/arch/loongarch/vdso/Makefile
+++ b/arch/loongarch/vdso/Makefile
@@ -43,7 +43,7 @@ ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
#
quiet_cmd_vdsold_and_vdso_check = LD $@
- cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check)
+ cmd_vdsold_and_vdso_check = $(cmd_ld_vdso); $(cmd_vdso_check)
quiet_cmd_vdsoas_o_S = AS $@
cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $<
@@ -72,7 +72,7 @@ $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
$(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi)
-$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
+$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) $(vdsocheck) FORCE
$(call if_changed,vdsold_and_vdso_check)
$(obj)/vdso.so: OBJCOPYFLAGS := -S
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index 441ff03e1028f7bde5104bd01941c6a9b006e21f..0fe70b3604f9925ef8c5608bb4cac24d3a28faab 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -56,6 +56,7 @@ config HAVE_VDSOCHECK
default y if ARM64
default y if PPC
default y if RISCV
+ default y if LOONGARCH
help
Selected for architectures that are supported by the 'vdsocheck' progam.
Only transitional.
diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs
index d48c9da6f18270afe883d167955f73f061b9c472..93819f668d8a4f623f41403bb09b42c4aec2c8de 100644
--- a/lib/vdso/check/vdsocheck.rs
+++ b/lib/vdso/check/vdsocheck.rs
@@ -115,6 +115,29 @@ fn allowed_relocations_for_machine(machine: u16) -> Option<AllowedRelocations<'s
bindings::R_RISCV_32_PCREL,
],
}),
+ bindings::EM_LOONGARCH => Some(AllowedRelocations {
+ ignored_object_file_sections: None,
+ in_object_file: &[
+ bindings::R_LARCH_ADD8,
+ bindings::R_LARCH_ADD16,
+ bindings::R_LARCH_ADD24,
+ bindings::R_LARCH_ADD32,
+ bindings::R_LARCH_ADD64,
+ bindings::R_LARCH_SUB8,
+ bindings::R_LARCH_SUB16,
+ bindings::R_LARCH_SUB24,
+ bindings::R_LARCH_SUB32,
+ bindings::R_LARCH_SUB64,
+ bindings::R_LARCH_B16,
+ bindings::R_LARCH_B21,
+ bindings::R_LARCH_B26,
+ bindings::R_LARCH_PCALA_HI20,
+ bindings::R_LARCH_PCALA_LO12,
+ bindings::R_LARCH_PCALA64_LO20,
+ bindings::R_LARCH_PCALA64_HI12,
+ bindings::R_LARCH_32_PCREL,
+ ],
+ }),
_ => None,
}
}
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 21/24] s390/vdso: Enable the vdsocheck tool
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (19 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 20/24] LoongArch: vDSO: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 22/24] MIPS: ELF: Add more PC-relative relocation definitions Thomas Weißschuh
` (4 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
The vdsocheck tool validates the object files and final .so library.
It can detect if the compiler created relocations which are incompatible
with the vDSO which need to be worked around.
Wire it up for the architecture.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/s390/kernel/vdso32/Makefile | 4 ++--
arch/s390/kernel/vdso64/Makefile | 4 ++--
lib/vdso/Kconfig | 1 +
lib/vdso/check/vdsocheck.rs | 8 ++++++++
4 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/arch/s390/kernel/vdso32/Makefile b/arch/s390/kernel/vdso32/Makefile
index 1e4ddd1a683ff84492f0f4b48d0efa00688129c2..6e8fba248d1aa8787f44aca2d82d77c245871b65 100644
--- a/arch/s390/kernel/vdso32/Makefile
+++ b/arch/s390/kernel/vdso32/Makefile
@@ -36,9 +36,9 @@ CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
quiet_cmd_vdso_and_check = VDSO $@
- cmd_vdso_and_check = $(cmd_ld); $(cmd_vdso_check)
+ cmd_vdso_and_check = $(cmd_ld_vdso); $(cmd_vdso_check)
-$(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-vdso32) FORCE
+$(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-vdso32) $(vdsocheck) FORCE
$(call if_changed,vdso_and_check)
# strip rule for the .so file
diff --git a/arch/s390/kernel/vdso64/Makefile b/arch/s390/kernel/vdso64/Makefile
index d8f0df74280960cb351154a8a73b4f7fe83a9125..1334b6a188cedc883fe98dc271a995ee690c7fad 100644
--- a/arch/s390/kernel/vdso64/Makefile
+++ b/arch/s390/kernel/vdso64/Makefile
@@ -46,10 +46,10 @@ CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
quiet_cmd_vdso_and_check = VDSO $@
- cmd_vdso_and_check = $(cmd_ld); $(cmd_vdso_check)
+ cmd_vdso_and_check = $(cmd_ld_vdso); $(cmd_vdso_check)
# link rule for the .so file, .lds has to be first
-$(obj)/vdso64.so.dbg: $(obj)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) FORCE
+$(obj)/vdso64.so.dbg: $(obj)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) $(vdsocheck) FORCE
$(call if_changed,vdso_and_check)
# strip rule for the .so file
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index 0fe70b3604f9925ef8c5608bb4cac24d3a28faab..b5b6673897e24a1f36147c21d00dff057f293980 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -57,6 +57,7 @@ config HAVE_VDSOCHECK
default y if PPC
default y if RISCV
default y if LOONGARCH
+ default y if S390
help
Selected for architectures that are supported by the 'vdsocheck' progam.
Only transitional.
diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs
index 93819f668d8a4f623f41403bb09b42c4aec2c8de..01073062f2b2d276291ccfbc6aa516f14a13fdd5 100644
--- a/lib/vdso/check/vdsocheck.rs
+++ b/lib/vdso/check/vdsocheck.rs
@@ -138,6 +138,14 @@ fn allowed_relocations_for_machine(machine: u16) -> Option<AllowedRelocations<'s
bindings::R_LARCH_32_PCREL,
],
}),
+ bindings::EM_S390 => Some(AllowedRelocations {
+ ignored_object_file_sections: None,
+ in_object_file: &[
+ bindings::R_390_PC32,
+ bindings::R_390_PC32DBL,
+ bindings::R_390_PLT32DBL,
+ ],
+ }),
_ => None,
}
}
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 22/24] MIPS: ELF: Add more PC-relative relocation definitions
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (20 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 21/24] s390/vdso: " Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 23/24] MIPS: vdso: Enable the vdsocheck tool Thomas Weißschuh
` (3 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
These are used by userspace and are necessary for the vdsocheck tool.
Also update the copy in tools/ so they can be used by vdsocheck.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
include/uapi/linux/elf-r.h | 6 ++++++
tools/include/uapi/linux/elf-r.h | 6 ++++++
2 files changed, 12 insertions(+)
diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
index e750989e44e8f517d7dacf9d3a338af7a136e40f..9f7457ba1c63252d10b9ab25601581bd99af7a21 100644
--- a/include/uapi/linux/elf-r.h
+++ b/include/uapi/linux/elf-r.h
@@ -616,10 +616,16 @@
*/
#define R_MIPS_PC21_S2 60
#define R_MIPS_PC26_S2 61
+#define R_MIPS_PC18_S3 62
+#define R_MIPS_PC19_S2 63
+#define R_MIPS_PCHI16 64
+#define R_MIPS_PCLO16 65
/*
* This range is reserved for vendor specific relocations.
*/
#define R_MIPS_LOVENDOR 100
#define R_MIPS_HIVENDOR 127
+#define R_MIPS_PC32 248
+
#endif /* _UAPI_LINUX_ELF_R_H */
diff --git a/tools/include/uapi/linux/elf-r.h b/tools/include/uapi/linux/elf-r.h
index e750989e44e8f517d7dacf9d3a338af7a136e40f..9f7457ba1c63252d10b9ab25601581bd99af7a21 100644
--- a/tools/include/uapi/linux/elf-r.h
+++ b/tools/include/uapi/linux/elf-r.h
@@ -616,10 +616,16 @@
*/
#define R_MIPS_PC21_S2 60
#define R_MIPS_PC26_S2 61
+#define R_MIPS_PC18_S3 62
+#define R_MIPS_PC19_S2 63
+#define R_MIPS_PCHI16 64
+#define R_MIPS_PCLO16 65
/*
* This range is reserved for vendor specific relocations.
*/
#define R_MIPS_LOVENDOR 100
#define R_MIPS_HIVENDOR 127
+#define R_MIPS_PC32 248
+
#endif /* _UAPI_LINUX_ELF_R_H */
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 23/24] MIPS: vdso: Enable the vdsocheck tool
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (21 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 22/24] MIPS: ELF: Add more PC-relative relocation definitions Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 5:44 ` [PATCH v4 24/24] vdso/vdsocheck: Drop the transitional kconfig option Thomas Weißschuh
` (2 subsequent siblings)
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
The vdsocheck tool validates the object files and final .so library.
It can detect if the compiler created relocations which are incompatible
with the vDSO which need to be worked around.
Wire it up for the architecture.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/mips/vdso/Makefile | 8 ++++----
lib/vdso/Kconfig | 1 +
lib/vdso/check/vdsocheck.rs | 13 +++++++++++++
3 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/arch/mips/vdso/Makefile b/arch/mips/vdso/Makefile
index 69d4593f64fee593c9ea5b030eabdea40b39b89a..24de045737580fb6a0148abb87e459d8f4be1d89 100644
--- a/arch/mips/vdso/Makefile
+++ b/arch/mips/vdso/Makefile
@@ -69,7 +69,7 @@ quiet_cmd_vdso_mips_check = VDSOCHK $@
#
quiet_cmd_vdsold_and_vdso_check = LD $@
- cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check); $(cmd_vdso_mips_check)
+ cmd_vdsold_and_vdso_check = $(cmd_ld_vdso); $(cmd_vdso_check); $(cmd_vdso_mips_check)
quiet_cmd_vdsoas_o_S = AS $@
cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $<
@@ -106,7 +106,7 @@ $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
$(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi)
-$(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
+$(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) $(vdsocheck) FORCE
$(call if_changed,vdsold_and_vdso_check)
$(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \
@@ -144,7 +144,7 @@ $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=32
$(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
$(call if_changed_dep,cpp_lds_S)
-$(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE
+$(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) $(vdsocheck) FORCE
$(call if_changed,vdsold_and_vdso_check)
$(obj)/vdso-o32-image.c: VDSO_NAME := o32
@@ -184,7 +184,7 @@ $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=n32
$(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
$(call if_changed_dep,cpp_lds_S)
-$(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE
+$(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) $(vdsocheck) FORCE
$(call if_changed,vdsold_and_vdso_check)
$(obj)/vdso-n32-image.c: VDSO_NAME := n32
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index b5b6673897e24a1f36147c21d00dff057f293980..567ac937a9c3084fd5669e1b890b667af8a2f12d 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -58,6 +58,7 @@ config HAVE_VDSOCHECK
default y if RISCV
default y if LOONGARCH
default y if S390
+ default y if MIPS
help
Selected for architectures that are supported by the 'vdsocheck' progam.
Only transitional.
diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs
index 01073062f2b2d276291ccfbc6aa516f14a13fdd5..d9e660385e154fea179665ef9c5ba90223bf72be 100644
--- a/lib/vdso/check/vdsocheck.rs
+++ b/lib/vdso/check/vdsocheck.rs
@@ -146,6 +146,19 @@ fn allowed_relocations_for_machine(machine: u16) -> Option<AllowedRelocations<'s
bindings::R_390_PLT32DBL,
],
}),
+ bindings::EM_MIPS => Some(AllowedRelocations {
+ ignored_object_file_sections: Some(&[".rel.pdr", ".rela.pdr"]),
+ in_object_file: &[
+ bindings::R_MIPS_PC16,
+ bindings::R_MIPS_PC21_S2,
+ bindings::R_MIPS_PC26_S2,
+ bindings::R_MIPS_PC18_S3,
+ bindings::R_MIPS_PC19_S2,
+ bindings::R_MIPS_PCHI16,
+ bindings::R_MIPS_PCLO16,
+ bindings::R_MIPS_PC32,
+ ],
+ }),
_ => None,
}
}
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v4 24/24] vdso/vdsocheck: Drop the transitional kconfig option
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (22 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 23/24] MIPS: vdso: Enable the vdsocheck tool Thomas Weißschuh
@ 2025-08-12 5:44 ` Thomas Weißschuh
2025-08-12 11:07 ` [PATCH v4 00/24] vdso: Reject absolute relocations during build Miguel Ojeda
2025-08-14 13:43 ` Christophe Leroy
25 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-12 5:44 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti, Thomas Weißschuh
All users of the generic vDSO are now using the vdsocheck tool.
Remove the now unnecessary kconfig option.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
lib/vdso/Kconfig | 14 --------------
lib/vdso/Makefile.include | 2 +-
2 files changed, 1 insertion(+), 15 deletions(-)
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index 567ac937a9c3084fd5669e1b890b667af8a2f12d..45df764b49ad62479e6456e00c053e46131936a3 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -48,17 +48,3 @@ config GENERIC_VDSO_DATA_STORE
bool
help
Selected by architectures that use the generic vDSO data store.
-
-config HAVE_VDSOCHECK
- bool
- default y if X86
- default y if ARM
- default y if ARM64
- default y if PPC
- default y if RISCV
- default y if LOONGARCH
- default y if S390
- default y if MIPS
- help
- Selected for architectures that are supported by the 'vdsocheck' progam.
- Only transitional.
diff --git a/lib/vdso/Makefile.include b/lib/vdso/Makefile.include
index 759fe41b48f658c399f54aa7d54a3dfeb07e5c9c..a5621b1d6ab51fde3fdab6e72309d51943939860 100644
--- a/lib/vdso/Makefile.include
+++ b/lib/vdso/Makefile.include
@@ -6,7 +6,7 @@ GENERIC_VDSO_DIR := $(dir $(GENERIC_VDSO_MK_PATH))
c-gettimeofday-$(CONFIG_GENERIC_GETTIMEOFDAY) := $(addprefix $(GENERIC_VDSO_DIR), gettimeofday.c)
c-getrandom-$(CONFIG_VDSO_GETRANDOM) := $(addprefix $(GENERIC_VDSO_DIR), getrandom.c)
-ifeq ($(CONFIG_RUST_IS_AVAILABLE)$(CONFIG_HAVE_VDSOCHECK),yy)
+ifdef CONFIG_RUST_IS_AVAILABLE
vdsocheck := lib/vdso/check/vdsocheck
$(vdsocheck): FORCE
--
2.50.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH v4 00/24] vdso: Reject absolute relocations during build
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (23 preceding siblings ...)
2025-08-12 5:44 ` [PATCH v4 24/24] vdso/vdsocheck: Drop the transitional kconfig option Thomas Weißschuh
@ 2025-08-12 11:07 ` Miguel Ojeda
2025-08-13 8:16 ` Thomas Weißschuh
2025-08-14 13:43 ` Christophe Leroy
25 siblings, 1 reply; 32+ messages in thread
From: Miguel Ojeda @ 2025-08-12 11:07 UTC (permalink / raw)
To: Thomas Weißschuh
Cc: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier, linux-riscv,
linux-kernel, llvm, linux-mm, linux-um, linux-arm-kernel,
linuxppc-dev, loongarch, linux-s390, linux-mips, rust-for-linux,
linux-kbuild, Jan Stancek, Arnaldo Carvalho de Melo,
Alexandre Ghiti
On Tue, Aug 12, 2025 at 7:44 AM Thomas Weißschuh
<thomas.weissschuh@linutronix.de> wrote:
>
> Kbuild and Rust folks: This contains custom definitions of hostprog
> bindgen and rust library commands.
> These are currently only defined inside the subsystem directory.
> Let me know if they should go into scripts/Makefile.host.
Glad to see more Rust host progs :)
Keeping them local may be a bit easier initially to land, I guess
(e.g. no docs), and then we can generalize when needed later.
By the way, for consistency with elsewhere, probably we want
`HOSTRUSTLIB` -> `HOSTRUSTC L`. Though I am thinking to remove the `L`
anyway since eventually a lot of code will be "lib".
Cheers,
Miguel
^ permalink raw reply [flat|nested] 32+ messages in thread* Re: [PATCH v4 00/24] vdso: Reject absolute relocations during build
2025-08-12 11:07 ` [PATCH v4 00/24] vdso: Reject absolute relocations during build Miguel Ojeda
@ 2025-08-13 8:16 ` Thomas Weißschuh
0 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-13 8:16 UTC (permalink / raw)
To: Miguel Ojeda
Cc: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Christophe Leroy, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier, linux-riscv,
linux-kernel, llvm, linux-mm, linux-um, linux-arm-kernel,
linuxppc-dev, loongarch, linux-s390, linux-mips, rust-for-linux,
linux-kbuild, Jan Stancek, Arnaldo Carvalho de Melo,
Alexandre Ghiti
On Tue, Aug 12, 2025 at 01:07:34PM +0200, Miguel Ojeda wrote:
> On Tue, Aug 12, 2025 at 7:44 AM Thomas Weißschuh
> <thomas.weissschuh@linutronix.de> wrote:
> >
> > Kbuild and Rust folks: This contains custom definitions of hostprog
> > bindgen and rust library commands.
> > These are currently only defined inside the subsystem directory.
> > Let me know if they should go into scripts/Makefile.host.
>
> Glad to see more Rust host progs :)
>
> Keeping them local may be a bit easier initially to land, I guess
> (e.g. no docs), and then we can generalize when needed later.
I'm happy to do the docs etc. I only wanted to avoid doing all that work,
only for it to stay a subsystem-local solution.
Also it would be nice to have a Kconfig symbol, RUSTC_CAN_LINK or similar,
which indicates that the rust compiler can build host programs.
> By the way, for consistency with elsewhere, probably we want
> `HOSTRUSTLIB` -> `HOSTRUSTC L`. Though I am thinking to remove the `L`
> anyway since eventually a lot of code will be "lib".
Ack.
^ permalink raw reply [flat|nested] 32+ messages in thread
* Re: [PATCH v4 00/24] vdso: Reject absolute relocations during build
2025-08-12 5:44 [PATCH v4 00/24] vdso: Reject absolute relocations during build Thomas Weißschuh
` (24 preceding siblings ...)
2025-08-12 11:07 ` [PATCH v4 00/24] vdso: Reject absolute relocations during build Miguel Ojeda
@ 2025-08-14 13:43 ` Christophe Leroy
2025-08-15 10:06 ` Thomas Weißschuh
25 siblings, 1 reply; 32+ messages in thread
From: Christophe Leroy @ 2025-08-14 13:43 UTC (permalink / raw)
To: Thomas Weißschuh, Paul Walmsley, Palmer Dabbelt, Albert Ou,
Alexandre Ghiti, Nathan Chancellor, Nick Desaulniers,
Bill Wendling, Justin Stitt, Andy Lutomirski, Thomas Gleixner,
Vincenzo Frascino, Kees Cook, Ingo Molnar, Borislav Petkov,
Dave Hansen, x86, H. Peter Anvin, Richard Weinberger,
Anton Ivanov, Johannes Berg, Russell King, Catalin Marinas,
Will Deacon, Madhavan Srinivasan, Michael Ellerman,
Nicholas Piggin, Huacai Chen, WANG Xuerui, Heiko Carstens,
Vasily Gorbik, Alexander Gordeev, Christian Borntraeger,
Sven Schnelle, Thomas Bogendoerfer, Miguel Ojeda, Alex Gaynor,
Boqun Feng, Gary Guo, Björn Roy Baron, Benno Lossin,
Andreas Hindborg, Alice Ryhl, Trevor Gross, Danilo Krummrich,
Nicolas Schier
Cc: linux-riscv, linux-kernel, llvm, linux-mm, linux-um,
linux-arm-kernel, linuxppc-dev, loongarch, linux-s390, linux-mips,
rust-for-linux, linux-kbuild, Jan Stancek,
Arnaldo Carvalho de Melo, Alexandre Ghiti
Le 12/08/2025 à 07:44, Thomas Weißschuh a écrit :
> The compiler can emit absolute relocations in vDSO code,
> which are invalid in vDSO code.
> Detect them at compile-time.
I'm a bit puzzled with this series.
If I understand correctly, the check will be done only when you have
RUST available ?
I wouldn't expect having RUST to build a C kernel.
By the way, aren't relocations already detected by command
cmd_vdso_check in lib/vdso/Makefile.include , using readelf ? Why is a
new tool needed and why does it have to be written in RUST langage ?
Thanks
Christophe
>
> libc elf.h is missing some of the relocation constants,
> so make user of the kernels own UAPI headers instead.
>
> Kbuild and Rust folks: This contains custom definitions of hostprog
> bindgen and rust library commands.
> These are currently only defined inside the subsystem directory.
> Let me know if they should go into scripts/Makefile.host.
>
> This will conflict with my SPARC64 generic vDSO patches [0].
> If both end up being applied at the same time, please leave out commit
> 'vdso/vdsocheck: Drop the transitional kconfig option' from this series.
>
> [0] https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Flkml%2F20250724-vdso-sparc64-generic-2-v1-0-e376a3bd24d1%40linutronix.de%2F&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C3f03f6747325451ee98808ddd9634f27%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638905742749561064%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=HacF%2FvlUoxA9P6fTiN1ytw49gwayX1wNE7IxfEkFutE%3D&reserved=0
>
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
> ---
> Changes in v4:
> - Replace the inline shell logic with a dedicated build-time tool
> - Link to v3: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fr%2F20250611-vdso-absolute-reloc-v3-0-47897d73784b%40linutronix.de&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C3f03f6747325451ee98808ddd9634f27%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638905742749584369%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=7NxAhutk6IXl%2B3fe1kkZEzhZz6CWye%2FVAcFO%2BgtS4uo%3D&reserved=0
>
> Changes in v3:
> - Drop already applied bugfix for arm64
> - Disable LTO for the riscv vDSO, as it is incompatible
> - Link to v2: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fr%2F20250430-vdso-absolute-reloc-v2-0-5efcc3bc4b26%40linutronix.de&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C3f03f6747325451ee98808ddd9634f27%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638905742749600546%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=uv0qMS5qq0DovLHtxfRvT42atbJEkztylpOS8zt6bJ4%3D&reserved=0
>
> Changes in v2:
> - Link to openend (invalid) GCC bug containing more explanations
> - Refine commit messages
> - Don't fail on commit absolute relocations in debug info
> - Link to v1: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fr%2F20250429-vdso-absolute-reloc-v1-0-987a0afd10b5%40linutronix.de&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C3f03f6747325451ee98808ddd9634f27%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638905742749616057%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=K5iwoz0Xqc8kheotWEc4M2KrZ7UVMDObOyFfCPj4N8Q%3D&reserved=0
>
> ---
> Thomas Weißschuh (24):
> elf, uapi: Add a header for relocation constants
> x86/elf, um/x86/elf: Move relocation constants to UAPI
> ARM: elf: Move relocation constants to UAPI
> arm64: elf: Move relocation constants to UAPI
> powerpc/elf: Move relocation constants to UAPI
> riscv: elf: Move relocation constants to UAPI
> LoongArch: Move relocation constants to UAPI
> s390/elf: Move relocation constants to UAPI
> MIPS: ELF: Move relocation constants to UAPI
> tools headers UAPI: Sync ELF headers with the kernel sources
> vdso: Add the vdsocheck tool
> x86/vdso: Enable the vdsocheck tool
> ARM: vdso: Enable the vdsocheck tool
> arm64: vdso: Enable the vdsocheck tool
> powerpc/elf: Add 32-bit REL16 relocation definitions
> powerpc/vdso: Enable the vdsocheck tool
> riscv: vdso: Deduplicate CFLAGS_REMOVE_* variables
> riscv: vdso: Disable LTO for the vDSO
> riscv: vdso: Enable the vdsocheck tool
> LoongArch: vDSO: Enable the vdsocheck tool
> s390/vdso: Enable the vdsocheck tool
> MIPS: ELF: Add more PC-relative relocation definitions
> MIPS: vdso: Enable the vdsocheck tool
> vdso/vdsocheck: Drop the transitional kconfig option
>
> arch/arm/include/asm/elf.h | 24 --
> arch/arm/vdso/Makefile | 4 +-
> arch/arm64/include/asm/elf.h | 55 ----
> arch/arm64/kernel/vdso/Makefile | 4 +-
> arch/loongarch/include/asm/elf.h | 100 ------
> arch/loongarch/vdso/Makefile | 4 +-
> arch/mips/include/asm/elf.h | 53 ---
> arch/mips/vdso/Makefile | 8 +-
> arch/powerpc/include/uapi/asm/elf.h | 201 ------------
> arch/powerpc/kernel/vdso/Makefile | 4 +-
> arch/riscv/include/uapi/asm/elf.h | 66 ----
> arch/riscv/kernel/vdso/Makefile | 11 +-
> arch/s390/include/asm/elf.h | 83 -----
> arch/s390/kernel/vdso32/Makefile | 4 +-
> arch/s390/kernel/vdso64/Makefile | 4 +-
> arch/x86/entry/vdso/Makefile | 6 +-
> arch/x86/include/asm/elf.h | 34 --
> arch/x86/um/asm/elf.h | 33 --
> include/uapi/linux/elf-r.h | 631 ++++++++++++++++++++++++++++++++++++
> include/uapi/linux/elf.h | 1 +
> lib/vdso/Makefile | 2 +
> lib/vdso/Makefile.include | 17 +
> lib/vdso/check/.gitignore | 3 +
> lib/vdso/check/Makefile | 28 ++
> lib/vdso/check/elf.rs | 488 ++++++++++++++++++++++++++++
> lib/vdso/check/vdsocheck.rs | 279 ++++++++++++++++
> tools/include/uapi/linux/elf-em.h | 71 ++++
> tools/include/uapi/linux/elf-r.h | 631 ++++++++++++++++++++++++++++++++++++
> tools/include/uapi/linux/elf.h | 112 ++++++-
> 29 files changed, 2277 insertions(+), 684 deletions(-)
> ---
> base-commit: 5180c6526acc9f1cb58f8b11fba67583c22e0854
> change-id: 20250428-vdso-absolute-reloc-a226293c1761
>
> Best regards,
^ permalink raw reply [flat|nested] 32+ messages in thread* Re: [PATCH v4 00/24] vdso: Reject absolute relocations during build
2025-08-14 13:43 ` Christophe Leroy
@ 2025-08-15 10:06 ` Thomas Weißschuh
0 siblings, 0 replies; 32+ messages in thread
From: Thomas Weißschuh @ 2025-08-15 10:06 UTC (permalink / raw)
To: Christophe Leroy
Cc: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Nathan Chancellor, Nick Desaulniers, Bill Wendling, Justin Stitt,
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Kees Cook,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Richard Weinberger, Anton Ivanov, Johannes Berg, Russell King,
Catalin Marinas, Will Deacon, Madhavan Srinivasan,
Michael Ellerman, Nicholas Piggin, Huacai Chen, WANG Xuerui,
Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, Thomas Bogendoerfer,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl,
Trevor Gross, Danilo Krummrich, Nicolas Schier, linux-riscv,
linux-kernel, llvm, linux-mm, linux-um, linux-arm-kernel,
linuxppc-dev, loongarch, linux-s390, linux-mips, rust-for-linux,
linux-kbuild, Jan Stancek, Arnaldo Carvalho de Melo,
Alexandre Ghiti
Hi Christophe,
On Thu, Aug 14, 2025 at 03:43:09PM +0200, Christophe Leroy wrote:
> Le 12/08/2025 à 07:44, Thomas Weißschuh a écrit :
> > The compiler can emit absolute relocations in vDSO code,
> > which are invalid in vDSO code.
> > Detect them at compile-time.
>
> I'm a bit puzzled with this series.
>
> If I understand correctly, the check will be done only when you have RUST
> available ?
Yes, this new check will only be performed if a rust toolchain is available.
CONFIG_RUST however is *not* required.
> I wouldn't expect having RUST to build a C kernel.
The build will work fine without Rust present and will fall back to the
simplistic readelf test. A single report of breakage will allow us to fix the code,
not everybody needs to run the full thing.
> By the way, aren't relocations already detected by command cmd_vdso_check in
> lib/vdso/Makefile.include , using readelf ? Why is a new tool needed
The current cmd_vdso_check only validates the final vDSO image.
However that is not sufficient, as some problematic relocations will not show
up in the final image anymore but only the intermediary object files.
And there the logic is more complex than can be reasonably expressed in inline
shell scripts, see the previous revisions of this series for the attempts.
The valid relocations depend on each architecture and the specific ELF section
they appear in.
For the real example that triggered all of this, see commit
0c314cda9325 ("arm64: vdso: Work around invalid absolute relocations from GCC")
> and why does it have to be written in RUST langage ?
There is no hard requirement for Rust. I chose it for convenience of
implementation, especially around descriptive error handling and generic
functions. tglx was fine with it.
Thomas
^ permalink raw reply [flat|nested] 32+ messages in thread