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[src/trunk]: src/lib/libc/arch/x86_64/sys Restore RSP from mcontext
details: https://anonhg.NetBSD.org/src/rev/75d368cd7422
branches: trunk
changeset: 945039:75d368cd7422
user: kamil <kamil%NetBSD.org@localhost>
date: Mon Oct 19 11:29:26 2020 +0000
description:
Restore RSP from mcontext
Fixes unwinding of multiple frames without base pointer.
Patch by: Nikhil Benesch via PR lib/55719
diffstat:
lib/libc/arch/x86_64/sys/__sigtramp2.S | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diffs (18 lines):
diff -r 24727bab7ecc -r 75d368cd7422 lib/libc/arch/x86_64/sys/__sigtramp2.S
--- a/lib/libc/arch/x86_64/sys/__sigtramp2.S Mon Oct 19 10:28:47 2020 +0000
+++ b/lib/libc/arch/x86_64/sys/__sigtramp2.S Mon Oct 19 11:29:26 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: __sigtramp2.S,v 1.8 2020/10/12 17:55:54 kamil Exp $ */
+/* $NetBSD: __sigtramp2.S,v 1.9 2020/10/19 11:29:26 kamil Exp $ */
/*
* Copyright (c) 2001 Wasabi Systems, Inc.
@@ -58,7 +58,7 @@
.cfi_offset rsi, UC_GREGS_RSI
.cfi_offset rdi, UC_GREGS_RDI
.cfi_offset rbp, UC_GREGS_RBP
- /* The unwinder will use the CFA to restore RSP. */
+ .cfi_offset rsp, UC_GREGS_RSP
.cfi_offset r8, UC_GREGS_R8
.cfi_offset r9, UC_GREGS_R9
.cfi_offset r10, UC_GREGS_R10
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