41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
From 23cd0de28cc7978130b770dd59b18ac143253351 Mon Sep 17 00:00:00 2001
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From: Vineet Gupta <vgupta@synopsys.com>
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Date: Tue, 28 Jun 2016 09:42:25 +0530
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Subject: [PATCH] ARC: unwind: ensure that .debug_frame is generated (vs.
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.eh_frame)
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With recent binutils update to support dwarf CFI pseudo-ops in gas, we
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now get .eh_frame vs. .debug_frame. Although the call frame info is
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exactly the same in both, the CIE differs, which the current kernel
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unwinder can't cope with.
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This broke both the kernel unwinder as well as loadable modules (latter
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because of a new unhandled relo R_ARC_32_PCREL from .rela.eh_frame in
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the module loader)
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The ideal solution would be to switch unwinder to .eh_frame.
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For now however we can make do by just ensureing .debug_frame is
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generated by removing -fasynchronous-unwind-tables
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.eh_frame generated with -gdwarf-2 -fasynchronous-unwind-tables
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.debug_frame generated with -gdwarf-2
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Fixes STAR 9001058196
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Cc: stable@vger.kernel.org
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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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---
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arch/arc/Makefile | 2 --
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1 file changed, 2 deletions(-)
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--- a/arch/arc/Makefile
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+++ b/arch/arc/Makefile
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@@ -48,8 +48,6 @@ endif
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endif
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-cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
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-
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# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
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ifeq ($(atleast_gcc48),y)
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cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2
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