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| author | Vineet Gupta <vgupta@synopsys.com> | 2016-06-28 09:42:25 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-06-28 09:42:28 +0530 |
| commit | f52e126cc7476196f44f3c313b7d9f0699a881fc (patch) | |
| tree | c014761544d59df284f60cbc5621b9895288096f | |
| parent | 5edb56491d4812c42175980759da53388e5d86f5 (diff) | |
| download | stm32-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>
| -rw-r--r-- | arch/arc/Makefile | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arc/Makefile b/arch/arc/Makefile index d4df6be66d583d..85814e74677d54 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 |