[PATCH v2 07/20] objtool: Add asm version of STACK_FRAME_NON_STANDARD

[Josh Poimboeuf]

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>
---
 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 577f51436cf9..add1c6eb157e 100644
--- a/include/linux/objtool.h
+++ b/include/linux/objtool.h
@@ -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 */
diff --git a/tools/include/linux/objtool.h b/tools/include/linux/objtool.h
index 577f51436cf9..add1c6eb157e 100644
--- a/tools/include/linux/objtool.h
+++ b/tools/include/linux/objtool.h
@@ -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 */
-- 
2.29.2