[RFC 4/6] arm64: assembler: Add macro to annotate asm function having non standard stack-frame.

Raphael Gault
2019-04-09T13:54:09Z

Signed-off-by: Raphael Gault <raphael.gault@arm.com>
---
arch/arm64/include/asm/assembler.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index 4feb6119c3c9..636a07a7eb76 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -748,4 +748,22 @@ USER(\label, ic ivau, \tmp2) // invalidate I line PoU
.Lyield_out_\@ :
.endm

+
+#ifdef CONFIG_STACK_VALIDATION
+ /*
+ * This macro is the arm64 assembler equivalent of the
+ * macro STACK_FRAME_NON_STANDARD define at
+ * ~/include/linux/frame.h
+ */
+ .macro asm_stack_frame_non_standard func
+ .pushsection ".discard.func_stack_frame_non_standard"
+ .8byte \func
+ .popsection
+ .endm
+#else
+ .macro asm_stack_frame_non_standard func
+ .endm
+#endif
+
+
#endif /* __ASM_ASSEMBLER_H */
--
2.17.1