Buildroot Archive on lore.kernel.org
 help / color / mirror / Atom feed
* [Buildroot] [PATCH] package/gcc: fix missing .note.GNU-stack section
@ 2023-09-03  7:33 Waldemar Brodkorb
  2023-09-11 20:57 ` Thomas Petazzoni via buildroot
  2023-09-17  6:30 ` Peter Korsgaard
  0 siblings, 2 replies; 3+ messages in thread
From: Waldemar Brodkorb @ 2023-09-03  7:33 UTC (permalink / raw)
  To: buildroot

Shellinabox configure fails to detect ptsname_r, because of the following warning
binutils 2.39+ emits:
ld: warning: crtend.o: missing .note.GNU-stack section implies executable stack
ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker

Then the build errors out with:
shellinabox/launcher.c:772:12: error: static declaration of 'ptsname_r' follows non-static declaration

The same issue exist for cairo 1.16.0 and the detection of pthreads.

Fixes:
 - http://autobuild.buildroot.net/results/3e4/3e478d22e820703ddfd11d1491e631ef8ed6b29b
 - http://autobuild.buildroot.net/results/f60/f602ea17d5938a5beb81d07e13de75ba41d5f6a1

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
---
 ...add-.note.GNU-stack-section-on-linux.patch | 105 ++++++++++++++++++
 ...add-.note.GNU-stack-section-on-linux.patch | 105 ++++++++++++++++++
 2 files changed, 210 insertions(+)
 create mode 100644 package/gcc/11.4.0/0007-xtensa-add-.note.GNU-stack-section-on-linux.patch
 create mode 100644 package/gcc/12.3.0/0003-xtensa-add-.note.GNU-stack-section-on-linux.patch

diff --git a/package/gcc/11.4.0/0007-xtensa-add-.note.GNU-stack-section-on-linux.patch b/package/gcc/11.4.0/0007-xtensa-add-.note.GNU-stack-section-on-linux.patch
new file mode 100644
index 0000000000..967bbaf3fe
--- /dev/null
+++ b/package/gcc/11.4.0/0007-xtensa-add-.note.GNU-stack-section-on-linux.patch
@@ -0,0 +1,105 @@
+From 4958020ecc85a30c52544deaf3c017cea82a0fb0 Mon Sep 17 00:00:00 2001
+From: Max Filippov <jcmvbkbc@gmail.com>
+Date: Thu, 2 Mar 2023 09:45:41 -0800
+Subject: [PATCH] xtensa: add .note.GNU-stack section on linux
+
+gcc/
+	* config/xtensa/linux.h (TARGET_ASM_FILE_END): New macro.
+
+libgcc/
+	* config/xtensa/crti.S: Add .note.GNU-stack section on linux.
+	* config/xtensa/crtn.S: Likewise.
+	* config/xtensa/lib1funcs.S: Likewise.
+	* config/xtensa/lib2funcs.S: Likewise.
+
+Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+Upstream: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=6360bf9a2d08f08c151464c77c0da53cd702ff25
+---
+ gcc/config/xtensa/linux.h        | 1 +
+ libgcc/config/xtensa/crti.S      | 6 ++++++
+ libgcc/config/xtensa/crtn.S      | 6 ++++++
+ libgcc/config/xtensa/lib1funcs.S | 6 ++++++
+ libgcc/config/xtensa/lib2funcs.S | 6 ++++++
+ 5 files changed, 25 insertions(+)
+
+diff --git a/gcc/config/xtensa/linux.h b/gcc/config/xtensa/linux.h
+index 468a48489e7..a69e38c58ee 100644
+--- a/gcc/config/xtensa/linux.h
++++ b/gcc/config/xtensa/linux.h
+@@ -69,3 +69,4 @@ along with GCC; see the file COPYING3.  If not see
+ 
+ #undef DBX_REGISTER_NUMBER
+ 
++#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
+diff --git a/libgcc/config/xtensa/crti.S b/libgcc/config/xtensa/crti.S
+index 87a66e32e4a..40dd8c0dbc2 100644
+--- a/libgcc/config/xtensa/crti.S
++++ b/libgcc/config/xtensa/crti.S
+@@ -26,6 +26,12 @@
+ 
+ #include "xtensa-config.h"
+ 
++/* An executable stack is *not* required for these functions.  */
++#if defined(__ELF__) && defined(__linux__)
++.section .note.GNU-stack,"",%progbits
++.previous
++#endif
++
+ 	.section .init
+ 	.globl _init
+ 	.type _init,@function
+diff --git a/libgcc/config/xtensa/crtn.S b/libgcc/config/xtensa/crtn.S
+index 8d2c2b1f22b..9d29f8fce1a 100644
+--- a/libgcc/config/xtensa/crtn.S
++++ b/libgcc/config/xtensa/crtn.S
+@@ -27,6 +27,12 @@
+ 
+ #include "xtensa-config.h"
+ 
++/* An executable stack is *not* required for these functions.  */
++#if defined(__ELF__) && defined(__linux__)
++.section .note.GNU-stack,"",%progbits
++.previous
++#endif
++
+ 	.section .init
+ #if XCHAL_HAVE_WINDOWED && !__XTENSA_CALL0_ABI__
+ 	retw
+diff --git a/libgcc/config/xtensa/lib1funcs.S b/libgcc/config/xtensa/lib1funcs.S
+index a482a6eefc8..5245d7ad8ad 100644
+--- a/libgcc/config/xtensa/lib1funcs.S
++++ b/libgcc/config/xtensa/lib1funcs.S
+@@ -25,6 +25,12 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ 
+ #include "xtensa-config.h"
+ 
++/* An executable stack is *not* required for these functions.  */
++#if defined(__ELF__) && defined(__linux__)
++.section .note.GNU-stack,"",%progbits
++.previous
++#endif
++
+ /* Define macros for the ABS and ADDX* instructions to handle cases
+    where they are not included in the Xtensa processor configuration.  */
+ 
+diff --git a/libgcc/config/xtensa/lib2funcs.S b/libgcc/config/xtensa/lib2funcs.S
+index 36938c84924..a574a45fa68 100644
+--- a/libgcc/config/xtensa/lib2funcs.S
++++ b/libgcc/config/xtensa/lib2funcs.S
+@@ -25,6 +25,12 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ 
+ #include "xtensa-config.h"
+ 
++/* An executable stack is *not* required for these functions.  */
++#if defined(__ELF__) && defined(__linux__)
++.section .note.GNU-stack,"",%progbits
++.previous
++#endif
++
+ /* __xtensa_libgcc_window_spill: This function flushes out all but the
+    current register window.  This is used to set up the stack so that
+    arbitrary frames can be accessed.  */
+-- 
+2.39.2
+
diff --git a/package/gcc/12.3.0/0003-xtensa-add-.note.GNU-stack-section-on-linux.patch b/package/gcc/12.3.0/0003-xtensa-add-.note.GNU-stack-section-on-linux.patch
new file mode 100644
index 0000000000..4c79c3448f
--- /dev/null
+++ b/package/gcc/12.3.0/0003-xtensa-add-.note.GNU-stack-section-on-linux.patch
@@ -0,0 +1,105 @@
+From 38cdfcc4b2cca8d251ff8d8d34201dfe9849333e Mon Sep 17 00:00:00 2001
+From: Max Filippov <jcmvbkbc@gmail.com>
+Date: Thu, 2 Mar 2023 09:45:41 -0800
+Subject: [PATCH] xtensa: add .note.GNU-stack section on linux
+
+gcc/
+	* config/xtensa/linux.h (TARGET_ASM_FILE_END): New macro.
+
+libgcc/
+	* config/xtensa/crti.S: Add .note.GNU-stack section on linux.
+	* config/xtensa/crtn.S: Likewise.
+	* config/xtensa/lib1funcs.S: Likewise.
+	* config/xtensa/lib2funcs.S: Likewise.
+
+Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+Upstream: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=6360bf9a2d08f08c151464c77c0da53cd702ff25
+---
+ gcc/config/xtensa/linux.h        | 1 +
+ libgcc/config/xtensa/crti.S      | 6 ++++++
+ libgcc/config/xtensa/crtn.S      | 6 ++++++
+ libgcc/config/xtensa/lib1funcs.S | 6 ++++++
+ libgcc/config/xtensa/lib2funcs.S | 6 ++++++
+ 5 files changed, 25 insertions(+)
+
+diff --git a/gcc/config/xtensa/linux.h b/gcc/config/xtensa/linux.h
+index edce618fb94..fe0e3a43797 100644
+--- a/gcc/config/xtensa/linux.h
++++ b/gcc/config/xtensa/linux.h
+@@ -69,3 +69,4 @@ along with GCC; see the file COPYING3.  If not see
+ 
+ #undef DBX_REGISTER_NUMBER
+ 
++#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
+diff --git a/libgcc/config/xtensa/crti.S b/libgcc/config/xtensa/crti.S
+index 3de7bc101f4..0996e7cb29b 100644
+--- a/libgcc/config/xtensa/crti.S
++++ b/libgcc/config/xtensa/crti.S
+@@ -26,6 +26,12 @@
+ 
+ #include "xtensa-config.h"
+ 
++/* An executable stack is *not* required for these functions.  */
++#if defined(__ELF__) && defined(__linux__)
++.section .note.GNU-stack,"",%progbits
++.previous
++#endif
++
+ 	.section .init
+ 	.globl _init
+ 	.type _init,@function
+diff --git a/libgcc/config/xtensa/crtn.S b/libgcc/config/xtensa/crtn.S
+index 06b932edb14..a4cc9830096 100644
+--- a/libgcc/config/xtensa/crtn.S
++++ b/libgcc/config/xtensa/crtn.S
+@@ -27,6 +27,12 @@
+ 
+ #include "xtensa-config.h"
+ 
++/* An executable stack is *not* required for these functions.  */
++#if defined(__ELF__) && defined(__linux__)
++.section .note.GNU-stack,"",%progbits
++.previous
++#endif
++
+ 	.section .init
+ #if XCHAL_HAVE_WINDOWED && !__XTENSA_CALL0_ABI__
+ 	retw
+diff --git a/libgcc/config/xtensa/lib1funcs.S b/libgcc/config/xtensa/lib1funcs.S
+index 5a2bd20534f..7177dd4f73a 100644
+--- a/libgcc/config/xtensa/lib1funcs.S
++++ b/libgcc/config/xtensa/lib1funcs.S
+@@ -25,6 +25,12 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ 
+ #include "xtensa-config.h"
+ 
++/* An executable stack is *not* required for these functions.  */
++#if defined(__ELF__) && defined(__linux__)
++.section .note.GNU-stack,"",%progbits
++.previous
++#endif
++
+ /* Define macros for the ABS and ADDX* instructions to handle cases
+    where they are not included in the Xtensa processor configuration.  */
+ 
+diff --git a/libgcc/config/xtensa/lib2funcs.S b/libgcc/config/xtensa/lib2funcs.S
+index 681bac1be8c..a40c1a45604 100644
+--- a/libgcc/config/xtensa/lib2funcs.S
++++ b/libgcc/config/xtensa/lib2funcs.S
+@@ -25,6 +25,12 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ 
+ #include "xtensa-config.h"
+ 
++/* An executable stack is *not* required for these functions.  */
++#if defined(__ELF__) && defined(__linux__)
++.section .note.GNU-stack,"",%progbits
++.previous
++#endif
++
+ /* __xtensa_libgcc_window_spill: This function flushes out all but the
+    current register window.  This is used to set up the stack so that
+    arbitrary frames can be accessed.  */
+-- 
+2.39.2
+
-- 
2.39.2

_______________________________________________
buildroot mailing list
buildroot@buildroot.org
https://lists.buildroot.org/mailman/listinfo/buildroot

^ permalink raw reply related	[flat|nested] 3+ messages in thread
* Re: [Buildroot] [PATCH] package/gcc: fix missing .note.GNU-stack section
  2023-09-03  7:33 [Buildroot] [PATCH] package/gcc: fix missing .note.GNU-stack section Waldemar Brodkorb
@ 2023-09-11 20:57 ` Thomas Petazzoni via buildroot
  2023-09-17  6:30 ` Peter Korsgaard
  1 sibling, 0 replies; 3+ messages in thread
From: Thomas Petazzoni via buildroot @ 2023-09-11 20:57 UTC (permalink / raw)
  To: Waldemar Brodkorb; +Cc: buildroot

On Sun, 3 Sep 2023 09:33:33 +0200
Waldemar Brodkorb <wbx@openadk.org> wrote:

> Shellinabox configure fails to detect ptsname_r, because of the following warning
> binutils 2.39+ emits:
> ld: warning: crtend.o: missing .note.GNU-stack section implies executable stack
> ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
> 
> Then the build errors out with:
> shellinabox/launcher.c:772:12: error: static declaration of 'ptsname_r' follows non-static declaration
> 
> The same issue exist for cairo 1.16.0 and the detection of pthreads.
> 
> Fixes:
>  - http://autobuild.buildroot.net/results/3e4/3e478d22e820703ddfd11d1491e631ef8ed6b29b
>  - http://autobuild.buildroot.net/results/f60/f602ea17d5938a5beb81d07e13de75ba41d5f6a1
> 
> Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
> ---
>  ...add-.note.GNU-stack-section-on-linux.patch | 105 ++++++++++++++++++
>  ...add-.note.GNU-stack-section-on-linux.patch | 105 ++++++++++++++++++
>  2 files changed, 210 insertions(+)
>  create mode 100644 package/gcc/11.4.0/0007-xtensa-add-.note.GNU-stack-section-on-linux.patch
>  create mode 100644 package/gcc/12.3.0/0003-xtensa-add-.note.GNU-stack-section-on-linux.patch

Thanks a *LOT* for getting to the bottom of this. This is really what I
was looking for: the real fix, not some ugly workaround in all packages
that are affected. Really great work, much appreciated!

Applied to master, thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
_______________________________________________
buildroot mailing list
buildroot@buildroot.org
https://lists.buildroot.org/mailman/listinfo/buildroot

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [Buildroot] [PATCH] package/gcc: fix missing .note.GNU-stack section
  2023-09-03  7:33 [Buildroot] [PATCH] package/gcc: fix missing .note.GNU-stack section Waldemar Brodkorb
  2023-09-11 20:57 ` Thomas Petazzoni via buildroot
@ 2023-09-17  6:30 ` Peter Korsgaard
  1 sibling, 0 replies; 3+ messages in thread
From: Peter Korsgaard @ 2023-09-17  6:30 UTC (permalink / raw)
  To: Waldemar Brodkorb; +Cc: buildroot

>>>>> "Waldemar" == Waldemar Brodkorb <wbx@openadk.org> writes:

 > Shellinabox configure fails to detect ptsname_r, because of the following warning
 > binutils 2.39+ emits:
 > ld: warning: crtend.o: missing .note.GNU-stack section implies executable stack
 > ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker

 > Then the build errors out with:
 > shellinabox/launcher.c:772:12: error: static declaration of 'ptsname_r' follows non-static declaration

 > The same issue exist for cairo 1.16.0 and the detection of pthreads.

 > Fixes:
 >  - http://autobuild.buildroot.net/results/3e4/3e478d22e820703ddfd11d1491e631ef8ed6b29b
 >  - http://autobuild.buildroot.net/results/f60/f602ea17d5938a5beb81d07e13de75ba41d5f6a1

 > Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

Committed to 2023.08.x, thanks.

-- 
Bye, Peter Korsgaard
_______________________________________________
buildroot mailing list
buildroot@buildroot.org
https://lists.buildroot.org/mailman/listinfo/buildroot

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-09-17  6:31 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-09-03  7:33 [Buildroot] [PATCH] package/gcc: fix missing .note.GNU-stack section Waldemar Brodkorb
2023-09-11 20:57 ` Thomas Petazzoni via buildroot
2023-09-17  6:30 ` Peter Korsgaard

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox