This is a note to let you know that I've just added the patch titled
objtool: Add asm version of STACK_FRAME_NON_STANDARD
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
objtool-add-asm-version-of-stack_frame_non_standard.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 081df94301e317e84c3413686043987da2c3e39d Mon Sep 17 00:00:00 2001
From: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Date: Thu, 21 Jan 2021 15:29:23 -0600
Subject: objtool: Add asm version of STACK_FRAME_NON_STANDARD
From: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
commit 081df94301e317e84c3413686043987da2c3e39d upstream.
To be used for adding asm functions to the ignore list. The "aw" is
needed to help the ELF section metadata match GCC-created sections.
Otherwise the linker creates duplicate sections instead of combining
them.
Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Link: https://lore.kernel.org/r/8faa476f9a5ac89af27944ec184c89f95f3c6c49.1611263462.git.jpoimboe@xxxxxxxxxx
Signed-off-by: Daniel Sneddon <daniel.sneddon@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/objtool.h | 8 ++++++++
tools/include/linux/objtool.h | 8 ++++++++
2 files changed, 16 insertions(+)
--- a/include/linux/objtool.h
+++ b/include/linux/objtool.h
@@ -141,6 +141,12 @@ struct unwind_hint {
.popsection
.endm
+.macro STACK_FRAME_NON_STANDARD func:req
+ .pushsection .discard.func_stack_frame_non_standard, "aw"
+ .long \func - .
+ .popsection
+.endm
+
#endif /* __ASSEMBLY__ */
#else /* !CONFIG_STACK_VALIDATION */
@@ -158,6 +164,8 @@ struct unwind_hint {
.endm
.macro ANNOTATE_NOENDBR
.endm
+.macro STACK_FRAME_NON_STANDARD func:req
+.endm
#endif
#endif /* CONFIG_STACK_VALIDATION */
--- a/tools/include/linux/objtool.h
+++ b/tools/include/linux/objtool.h
@@ -141,6 +141,12 @@ struct unwind_hint {
.popsection
.endm
+.macro STACK_FRAME_NON_STANDARD func:req
+ .pushsection .discard.func_stack_frame_non_standard, "aw"
+ .long \func - .
+ .popsection
+.endm
+
#endif /* __ASSEMBLY__ */
#else /* !CONFIG_STACK_VALIDATION */
@@ -158,6 +164,8 @@ struct unwind_hint {
.endm
.macro ANNOTATE_NOENDBR
.endm
+.macro STACK_FRAME_NON_STANDARD func:req
+.endm
#endif
#endif /* CONFIG_STACK_VALIDATION */
Patches currently in stable-queue which might be from jpoimboe@xxxxxxxxxx are
queue-5.10/objtool-add-asm-version-of-stack_frame_non_standard.patch
