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ARC: dw2 unwind: switch to .eh_frame based unwinding

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So finally after almost 8 years of dealing with .debug_frame, we are
finally switching to .eh_frame. The reason being stripped kernel
binaries had non-functional unwinder as .debug_frame was gone.
Also, in general .eh_frame seems more common way of doing unwinding.

This also folds a revert of f52e126cc7 ("ARC: unwind: ensure that
.debug_frame is generated (vs. .eh_frame)") to ensure that we start
getting .eh_frame

Reported-by: Daniel Mentz <danielmentz@google.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta
2013-06-24 21:22:06 +05:30
parent d040876b4a
commit 6716dbbdef
5 changed files with 13 additions and 34 deletions
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5
arch/arc/kernel/unwind.c
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@@ -111,7 +111,7 @@ UNW_REGISTER_INFO};
#define DW_EH_PE_indirect 0x80
#define DW_EH_PE_omit 0xff
#define CIE_ID 0xffffffffUL
#define CIE_ID 0
typedef unsigned long uleb128_t;
typedef signed long sleb128_t;
@@ -510,8 +510,7 @@ static const u32 *__cie_for_fde(const u32 *fde)
{
const u32 *cie;
/* cie = fde + 1 - fde[1] / sizeof(*fde); */
cie = (u32 *) fde[1];
cie = fde + 1 - fde[1] / sizeof(*fde);
return cie;
}