Commit 081df943 authored by Josh Poimboeuf's avatar Josh Poimboeuf
Browse files

objtool: Add asm version of STACK_FRAME_NON_STANDARD 



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: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/8faa476f9a5ac89af27944ec184c89f95f3c6c49.1611263462.git.jpoimboe@redhat.com
parent ecf11ba4

include/linux/objtool.h

+8 −0
Original line number Diff line number Diff line
@@ -109,6 +109,12 @@ 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 */
@@ -122,6 +128,8 @@ struct unwind_hint { 
#define ANNOTATE_INTRA_FUNCTION_CALL

.macro UNWIND_HINT sp_reg:req sp_offset=0 type:req end=0

.endm

.macro STACK_FRAME_NON_STANDARD func:req

.endm

#endif



#endif /* CONFIG_STACK_VALIDATION */

tools/include/linux/objtool.h

+8 −0
Original line number Diff line number Diff line
@@ -109,6 +109,12 @@ 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 */
@@ -122,6 +128,8 @@ struct unwind_hint { 
#define ANNOTATE_INTRA_FUNCTION_CALL

.macro UNWIND_HINT sp_reg:req sp_offset=0 type:req end=0

.endm

.macro STACK_FRAME_NON_STANDARD func:req

.endm

#endif



#endif /* CONFIG_STACK_VALIDATION */