From 1a038ea9f9cc8d26d50667ac998ca36d193e5898 Mon Sep 17 00:00:00 2001 From: Josh Poimboeuf Date: Thu, 21 Jan 2021 15:29:23 -0600 Subject: [PATCH] objtool: Add asm version of STACK_FRAME_NON_STANDARD 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 Link: https://lore.kernel.org/r/8faa476f9a5ac89af27944ec184c89f95f3c6c49.1611263462.git.jpoimboe@redhat.com Signed-off-by: Daniel Sneddon Signed-off-by: Greg Kroah-Hartman --- include/linux/objtool.h | 8 ++++++++ tools/include/linux/objtool.h | 8 ++++++++ 2 files changed, 16 insertions(+) diff --git a/include/linux/objtool.h b/include/linux/objtool.h index d17fa7f4001d..0f13875acc5e 100644 --- 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 */ diff --git a/tools/include/linux/objtool.h b/tools/include/linux/objtool.h index d17fa7f4001d..0f13875acc5e 100644 --- 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 */