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authorVineet Gupta <vgupta@synopsys.com>2016-09-16 17:23:26 -0700
committerVineet Gupta <vgupta@synopsys.com>2016-09-30 14:48:22 -0700
commit5a205a32ffccf6e720a2d2b3aee44b16619016a6 (patch)
tree9ff1460c48ecbcc382405826ff53c5329bd5a9dd /arch/arc/Makefile
parent2dad1122d9d936cf120953324eaaa38c3ab20ac2 (diff)
downloadlinux-5a205a32ffccf6e720a2d2b3aee44b16619016a6.tar.bz2
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 <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/Makefile')
-rw-r--r--arch/arc/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index a2a6a4614241..aa82d13d4213 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -65,7 +65,8 @@ endif
endif
-cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
+cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
+cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi)
ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
# Generic build system uses -O2, we want -O3