[PATCH v2 10/29] vmlinux.lds.h: Move NOTES into RO_DATA

Kees Cook
2019-10-11T00:05:50Z

The .notes section should be non-executable read-only data. As such,
move it to the RO_DATA macro instead of being per-architecture defined.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
arch/alpha/kernel/vmlinux.lds.S | 2 --
arch/arc/kernel/vmlinux.lds.S | 2 --
arch/arm/kernel/vmlinux-xip.lds.S | 2 --
arch/arm/kernel/vmlinux.lds.S | 2 --
arch/arm64/kernel/vmlinux.lds.S | 1 -
arch/c6x/kernel/vmlinux.lds.S | 1 -
arch/csky/kernel/vmlinux.lds.S | 1 -
arch/h8300/kernel/vmlinux.lds.S | 1 -
arch/hexagon/kernel/vmlinux.lds.S | 1 -
arch/ia64/kernel/vmlinux.lds.S | 2 --
arch/microblaze/kernel/vmlinux.lds.S | 1 -
arch/mips/kernel/vmlinux.lds.S | 2 --
arch/nds32/kernel/vmlinux.lds.S | 1 -
arch/nios2/kernel/vmlinux.lds.S | 1 -
arch/openrisc/kernel/vmlinux.lds.S | 1 -
arch/parisc/kernel/vmlinux.lds.S | 1 -
arch/powerpc/kernel/vmlinux.lds.S | 2 --
arch/riscv/kernel/vmlinux.lds.S | 1 -
arch/s390/kernel/vmlinux.lds.S | 2 --
arch/sh/kernel/vmlinux.lds.S | 1 -
arch/sparc/kernel/vmlinux.lds.S | 1 -
arch/um/include/asm/common.lds.S | 1 -
arch/unicore32/kernel/vmlinux.lds.S | 1 -
arch/x86/kernel/vmlinux.lds.S | 2 --
arch/xtensa/kernel/vmlinux.lds.S | 1 -
include/asm-generic/vmlinux.lds.h | 9 +++++----
26 files changed, 5 insertions(+), 38 deletions(-)

diff --git a/arch/alpha/kernel/vmlinux.lds.S b/arch/alpha/kernel/vmlinux.lds.S
index cdfdc91ce64c..bf28043485f6 100644
--- a/arch/alpha/kernel/vmlinux.lds.S
+++ b/arch/alpha/kernel/vmlinux.lds.S
@@ -34,8 +34,6 @@ SECTIONS
swapper_pg_dir = SWAPPER_PGD;
_etext = .; /* End of text section */

- NOTES
-
RODATA
EXCEPTION_TABLE(16)

diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S
index 6c693a9d29b6..1d6eef4b6976 100644
--- a/arch/arc/kernel/vmlinux.lds.S
+++ b/arch/arc/kernel/vmlinux.lds.S
@@ -118,8 +118,6 @@ SECTIONS
/DISCARD/ : { *(.eh_frame) }
#endif

- NOTES
-
. = ALIGN(PAGE_SIZE);
_end = . ;

diff --git a/arch/arm/kernel/vmlinux-xip.lds.S b/arch/arm/kernel/vmlinux-xip.lds.S
index 8c74037ade22..d2a9651c24ad 100644
--- a/arch/arm/kernel/vmlinux-xip.lds.S
+++ b/arch/arm/kernel/vmlinux-xip.lds.S
@@ -70,8 +70,6 @@ SECTIONS
ARM_UNWIND_SECTIONS
#endif

- NOTES
-
_etext = .; /* End of text and rodata section */

ARM_VECTORS
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 23150c0f0f4d..068db6860867 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -81,8 +81,6 @@ SECTIONS
ARM_UNWIND_SECTIONS
#endif

- NOTES
-
#ifdef CONFIG_STRICT_KERNEL_RWX
. = ALIGN(1<<SECTION_SHIFT);
#else
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index aa76f7259668..e7dafc29b1fa 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -137,7 +137,6 @@ SECTIONS

RO_DATA(PAGE_SIZE) /* everything from this point to */
EXCEPTION_TABLE(8) /* __init_begin will be marked RO NX */
- NOTES

. = ALIGN(PAGE_SIZE);
idmap_pg_dir = .;
diff --git a/arch/c6x/kernel/vmlinux.lds.S b/arch/c6x/kernel/vmlinux.lds.S
index 584bab2bace6..d6e3802536b3 100644
--- a/arch/c6x/kernel/vmlinux.lds.S
+++ b/arch/c6x/kernel/vmlinux.lds.S
@@ -81,7 +81,6 @@ SECTIONS
}

EXCEPTION_TABLE(16)
- NOTES

RO_DATA_SECTION(PAGE_SIZE)
.const :
diff --git a/arch/csky/kernel/vmlinux.lds.S b/arch/csky/kernel/vmlinux.lds.S
index ae7961b973f2..75dd31412242 100644
--- a/arch/csky/kernel/vmlinux.lds.S
+++ b/arch/csky/kernel/vmlinux.lds.S
@@ -53,7 +53,6 @@ SECTIONS
RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
_edata = .;

- NOTES
EXCEPTION_TABLE(L1_CACHE_BYTES)
BSS_SECTION(L1_CACHE_BYTES, PAGE_SIZE, L1_CACHE_BYTES)
VBR_BASE
diff --git a/arch/h8300/kernel/vmlinux.lds.S b/arch/h8300/kernel/vmlinux.lds.S
index 49f716c0a1df..88776e785245 100644
--- a/arch/h8300/kernel/vmlinux.lds.S
+++ b/arch/h8300/kernel/vmlinux.lds.S
@@ -38,7 +38,6 @@ SECTIONS
_etext = . ;
}
EXCEPTION_TABLE(16)
- NOTES
RO_DATA_SECTION(4)
ROMEND = .;
#if defined(CONFIG_ROMKERNEL)
diff --git a/arch/hexagon/kernel/vmlinux.lds.S b/arch/hexagon/kernel/vmlinux.lds.S
index 78f2418e97c8..6a6e8fc422ee 100644
--- a/arch/hexagon/kernel/vmlinux.lds.S
+++ b/arch/hexagon/kernel/vmlinux.lds.S
@@ -54,7 +54,6 @@ SECTIONS
_edata = .;

EXCEPTION_TABLE(16)
- NOTES

BSS_SECTION(_PAGE_SIZE, _PAGE_SIZE, _PAGE_SIZE)

diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index bfc937ec168c..fae077595756 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -70,8 +70,6 @@ SECTIONS {
/*
* Read-only data
*/
- NOTES
-
EXCEPTION_TABLE(16)

/* MCA table */
diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
index e1f3e8741292..d008e50bb212 100644
--- a/arch/microblaze/kernel/vmlinux.lds.S
+++ b/arch/microblaze/kernel/vmlinux.lds.S
@@ -53,7 +53,6 @@ SECTIONS {
. = ALIGN(16);
RODATA
EXCEPTION_TABLE(16)
- NOTES

/*
* sdata2 section can go anywhere, but must be word aligned
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 6a22f531d815..91e566defc16 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -81,8 +81,6 @@ SECTIONS
__stop___dbe_table = .;
}

- NOTES
-
_sdata = .; /* Start of data section */
RODATA

diff --git a/arch/nds32/kernel/vmlinux.lds.S b/arch/nds32/kernel/vmlinux.lds.S
index 9e90f30a181d..c4f1c5a604c3 100644
--- a/arch/nds32/kernel/vmlinux.lds.S
+++ b/arch/nds32/kernel/vmlinux.lds.S
@@ -58,7 +58,6 @@ SECTIONS
_edata = .;

EXCEPTION_TABLE(16)
- NOTES
BSS_SECTION(4, 4, 4)
_end = .;

diff --git a/arch/nios2/kernel/vmlinux.lds.S b/arch/nios2/kernel/vmlinux.lds.S
index 6ad64f14617d..20e4078b3477 100644
--- a/arch/nios2/kernel/vmlinux.lds.S
+++ b/arch/nios2/kernel/vmlinux.lds.S
@@ -58,7 +58,6 @@ SECTIONS

STABS_DEBUG
DWARF_DEBUG
- NOTES

DISCARDS
}
diff --git a/arch/openrisc/kernel/vmlinux.lds.S b/arch/openrisc/kernel/vmlinux.lds.S
index 2e2c72c157f3..142c51c994f5 100644
--- a/arch/openrisc/kernel/vmlinux.lds.S
+++ b/arch/openrisc/kernel/vmlinux.lds.S
@@ -79,7 +79,6 @@ SECTIONS
_edata = .;

EXCEPTION_TABLE(4)
- NOTES

/* Init code and data */
. = ALIGN(PAGE_SIZE);
diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S
index 99cd24f2ea01..168d12b2ebb8 100644
--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/arch/parisc/kernel/vmlinux.lds.S
@@ -131,7 +131,6 @@ SECTIONS

/* RO because of BUILDTIME_EXTABLE_SORT */
EXCEPTION_TABLE(8)
- NOTES

/* unwind info */
.PARISC.unwind : {
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 4f19d814d592..4e7cec088c8b 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -164,8 +164,6 @@ SECTIONS
#endif
EXCEPTION_TABLE(0)

- NOTES
-
/*
* Init sections discarded at runtime
*/
diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S
index 23cd1a9e52a1..df5229c4034d 100644
--- a/arch/riscv/kernel/vmlinux.lds.S
+++ b/arch/riscv/kernel/vmlinux.lds.S
@@ -69,7 +69,6 @@ SECTIONS
BSS_SECTION(PAGE_SIZE, PAGE_SIZE, 0)

EXCEPTION_TABLE(0x10)
- NOTES

.rel.dyn : {
*(.rel.dyn*)
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index f88eedeb915a..beb4df053e20 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -52,8 +52,6 @@ SECTIONS
_etext = .; /* End of text section */
} :text = 0x0700

- NOTES
-
RO_DATA_SECTION(PAGE_SIZE)

. = ALIGN(PAGE_SIZE);
diff --git a/arch/sh/kernel/vmlinux.lds.S b/arch/sh/kernel/vmlinux.lds.S
index 77a59d8c6b4d..fef39054cc70 100644
--- a/arch/sh/kernel/vmlinux.lds.S
+++ b/arch/sh/kernel/vmlinux.lds.S
@@ -48,7 +48,6 @@ SECTIONS
} = 0x0009

EXCEPTION_TABLE(16)
- NOTES

_sdata = .;
RO_DATA(PAGE_SIZE)
diff --git a/arch/sparc/kernel/vmlinux.lds.S b/arch/sparc/kernel/vmlinux.lds.S
index 61afd787bd0c..8929fbc35a80 100644
--- a/arch/sparc/kernel/vmlinux.lds.S
+++ b/arch/sparc/kernel/vmlinux.lds.S
@@ -78,7 +78,6 @@ SECTIONS
__stop___fixup = .;
}
EXCEPTION_TABLE(16)
- NOTES

. = ALIGN(PAGE_SIZE);
__init_begin = ALIGN(PAGE_SIZE);
diff --git a/arch/um/include/asm/common.lds.S b/arch/um/include/asm/common.lds.S
index d7086b985f27..91aca356095f 100644
--- a/arch/um/include/asm/common.lds.S
+++ b/arch/um/include/asm/common.lds.S
@@ -16,7 +16,6 @@
PROVIDE (_unprotected_end = .);

. = ALIGN(4096);
- NOTES
EXCEPTION_TABLE(0)

BUG_TABLE
diff --git a/arch/unicore32/kernel/vmlinux.lds.S b/arch/unicore32/kernel/vmlinux.lds.S
index 7abf90537cd5..78c4c56057b0 100644
--- a/arch/unicore32/kernel/vmlinux.lds.S
+++ b/arch/unicore32/kernel/vmlinux.lds.S
@@ -48,7 +48,6 @@ SECTIONS
_edata = .;

EXCEPTION_TABLE(L1_CACHE_BYTES)
- NOTES

BSS_SECTION(0, 0, 0)
_end = .;
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 8be25b09c2b7..41362e90142d 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -148,8 +148,6 @@ SECTIONS
_etext = .;
} :text = 0x9090

- NOTES
-
EXCEPTION_TABLE(16)

/* .text should occupy whole number of pages */
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
index 943f10639a93..a0a843745695 100644
--- a/arch/xtensa/kernel/vmlinux.lds.S
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -131,7 +131,6 @@ SECTIONS
.fixup : { *(.fixup) }

EXCEPTION_TABLE(16)
- NOTES
/* Data section */

_sdata = .;
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 97d4299f14dc..dc3390ec6b60 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -28,7 +28,6 @@
* _edata = .;
*
* EXCEPTION_TABLE(...)
- * NOTES
*
* BSS_SECTION(0, 0, 0)
* _end = .;
@@ -512,10 +511,12 @@
__start___modver = .; \
KEEP(*(__modver)) \
__stop___modver = .; \
- . = ALIGN((align)); \
- __end_rodata = .; \
} \
- . = ALIGN((align));
+ \
+ NOTES \
+ \
+ . = ALIGN((align)); \
+ __end_rodata = .;

/* RODATA & RO_DATA provided for backward compatibility.
* All archs are supposed to use RO_DATA() */
--
2.17.1