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authorVineet Gupta <vgupta@synopsys.com>2016-06-28 09:42:25 +0530
committerVineet Gupta <vgupta@synopsys.com>2016-06-28 09:42:28 +0530
commitf52e126cc7476196f44f3c313b7d9f0699a881fc (patch)
treec014761544d59df284f60cbc5621b9895288096f /arch
parent5edb56491d4812c42175980759da53388e5d86f5 (diff)
downloadlinux-f52e126cc7476196f44f3c313b7d9f0699a881fc.tar.gz
ARC: unwind: ensure that .debug_frame is generated (vs. .eh_frame)
With recent binutils update to support dwarf CFI pseudo-ops in gas, we now get .eh_frame vs. .debug_frame. Although the call frame info is exactly the same in both, the CIE differs, which the current kernel unwinder can't cope with. This broke both the kernel unwinder as well as loadable modules (latter because of a new unhandled relo R_ARC_32_PCREL from .rela.eh_frame in the module loader) The ideal solution would be to switch unwinder to .eh_frame. For now however we can make do by just ensureing .debug_frame is generated by removing -fasynchronous-unwind-tables .eh_frame generated with -gdwarf-2 -fasynchronous-unwind-tables .debug_frame generated with -gdwarf-2 Fixes STAR 9001058196 Cc: stable@vger.kernel.org Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arc/Makefile2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index d4df6be66d58..85814e74677d 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -66,8 +66,6 @@ endif
endif
-cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
-
# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
ifeq ($(atleast_gcc48),y)
cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2