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Restore SP from mcontext

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Improves unwinding of multiple frames without frame pointer.
This commit is contained in:
kamil 2020-10-19 22:33:53 +00:00
parent 859199ba81
commit c82c3566be
1 changed files with 2 additions and 2 deletions
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4
lib/libc/arch/aarch64/sys/__sigtramp2.S
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@ -1,4 +1,4 @@
/* $NetBSD: __sigtramp2.S,v 1.3 2020/10/17 15:44:59 skrll Exp $ */
/* $NetBSD: __sigtramp2.S,v 1.4 2020/10/19 22:33:53 kamil Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
@ -82,7 +82,7 @@
.cfi_offset x28, _UC_REGS_X28
.cfi_offset x29, _UC_REGS_X29
.cfi_offset lr, _UC_REGS_LR
/* The unwinder will use the CFA to restore X31 (SP). */
.cfi_offset sp, _UC_REGS_SP
nop
ENTRY_NP(__sigtramp_siginfo_2)
mov x0, x28 /* set the arg */