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[binutils-gdb] Fix infinite recursion in amd64fbsd_sigcontext_addr
- From: Pedro Alves <palves at sourceware dot org>
- To: gdb-cvs at sourceware dot org
- Date: 26 Feb 2015 11:18:38 -0000
- Subject: [binutils-gdb] Fix infinite recursion in amd64fbsd_sigcontext_addr
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=c5cb74eeb3ea13a9fbeb0ec26b5bad10c4b92e4a
commit c5cb74eeb3ea13a9fbeb0ec26b5bad10c4b92e4a
Author: John Baldwin <jhb@freebsd.org>
Date: Thu Feb 26 11:07:57 2015 +0000
Fix infinite recursion in amd64fbsd_sigcontext_addr
amd64fbsd_sigcontext_addr is using frame_unwind_register_unsigned to
fetch the stack pointer which results in infinite recursion. This
patch changes it to use get_frame_register to match the
sigcontext_addr methods in the i386-bsd and amd64-linux targets
instead.
gdb/ChangeLog:
2015-02-25 John Baldwin <jhb@freebsd.org>
* amd64fbsd-tdep.c (amd64fbsd_sigcontext_addr): Use
get_frame_register instead of frame_unwind_register_unsigned.
Diff:
---
gdb/ChangeLog | 5 +++++
gdb/amd64fbsd-tdep.c | 6 +++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1aa6fc1..b024d23 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2015-02-25 John Baldwin <jhb@freebsd.org>
+
+ * amd64fbsd-tdep.c (amd64fbsd_sigcontext_addr): Use
+ get_frame_register instead of frame_unwind_register_unsigned.
+
2015-02-26 Jan Kratochvil <jan.kratochvil@redhat.com>
PR build/18033
diff --git a/gdb/amd64fbsd-tdep.c b/gdb/amd64fbsd-tdep.c
index 2d49cdf..abb0cab 100644
--- a/gdb/amd64fbsd-tdep.c
+++ b/gdb/amd64fbsd-tdep.c
@@ -37,12 +37,16 @@
static CORE_ADDR
amd64fbsd_sigcontext_addr (struct frame_info *this_frame)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR sp;
+ gdb_byte buf[8];
/* The `struct sigcontext' (which really is an `ucontext_t' on
FreeBSD/amd64) lives at a fixed offset in the signal frame. See
<machine/sigframe.h>. */
- sp = frame_unwind_register_unsigned (this_frame, AMD64_RSP_REGNUM);
+ get_frame_register (this_frame, AMD64_RSP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 8, byte_order);
return sp + 16;
}