From 5a205a32ffccf6e720a2d2b3aee44b16619016a6 Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Fri, 16 Sep 2016 17:23:26 -0700 Subject: ARC: dw2 unwind: add infrastructure for adding cfi pseudo ops to asm 1. detect whether binutils supports the cfi pseudo ops 2. define conditional macros to generate the ops 3. define new ENTRY_CFI/END_CFI to annotate hand asm code. - Needed because we don't want to emit dwarf info in general ENTRY/END used by lowest level trap/exception/interrutp handlers as unwinder gets confused trying to unwind out of them. We want unwinder to instead stop when it hits onfo those routines - These provide minimal start/end cfi ops assuming routine doesn't touch stack memory/regs Signed-off-by: Vineet Gupta --- arch/arc/include/asm/linkage.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'arch/arc/include/asm/linkage.h') diff --git a/arch/arc/include/asm/linkage.h b/arch/arc/include/asm/linkage.h index 5faad17118b4..b29f1a9fd6f7 100644 --- a/arch/arc/include/asm/linkage.h +++ b/arch/arc/include/asm/linkage.h @@ -9,6 +9,8 @@ #ifndef __ASM_LINKAGE_H #define __ASM_LINKAGE_H +#include + #ifdef __ASSEMBLY__ #define ASM_NL ` /* use '`' to mark new line in macro */ @@ -32,6 +34,16 @@ #endif .endm +#define ENTRY_CFI(name) \ + .globl name ASM_NL \ + ALIGN ASM_NL \ + name: ASM_NL \ + CFI_STARTPROC ASM_NL + +#define END_CFI(name) \ + CFI_ENDPROC ASM_NL \ + .size name, .-name + #else /* !__ASSEMBLY__ */ #ifdef CONFIG_ARC_HAS_ICCM -- cgit v1.2.3