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- From 23cd0de28cc7978130b770dd59b18ac143253351 Mon Sep 17 00:00:00 2001
- From: Vineet Gupta <[email protected]>
- Date: Tue, 28 Jun 2016 09:42:25 +0530
- Subject: [PATCH] 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: [email protected]
- Signed-off-by: Vineet Gupta <[email protected]>
- ---
- arch/arc/Makefile | 2 --
- 1 file changed, 2 deletions(-)
- --- a/arch/arc/Makefile
- +++ b/arch/arc/Makefile
- @@ -48,8 +48,6 @@ 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
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