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| author | Vineet Gupta <vgupta@synopsys.com> | 2016-06-28 07:12:25 +0300 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-07-12 15:47:15 +0300 |
| commit | e4c542a8dcffff2832206903ad4c7e8619bf39ae (patch) | |
| tree | 4a3985db41ef718bc418a4c4f2fb12c7c1692bc8 /arch/arc | |
| parent | 0c0ad079718231c754af426fccdfe35526c88d5d (diff) | |
| download | linux-e4c542a8dcffff2832206903ad4c7e8619bf39ae.tar.xz | |
ARC: unwind: ensure that .debug_frame is generated (vs. .eh_frame)
[ Upstream commit f52e126cc7476196f44f3c313b7d9f0699a881fc ]
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>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/Makefile | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/arc/Makefile b/arch/arc/Makefile index 10bc3d4e8a44..dada919aba27 100644 --- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -34,7 +34,6 @@ cflags-$(atleast_gcc44) += -fsection-anchors cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc -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) |