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Fix infinite recursion in amd64fbsd_sigcontext_addr

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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.
This commit is contained in:
John Baldwin 2015-02-26 11:07:57 +00:00 committed by Pedro Alves
parent 17487d857c
commit c5cb74eeb3
2 changed files with 10 additions and 1 deletions
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5
gdb/ChangeLog
View file

@ -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> 2015-02-26 Jan Kratochvil <jan.kratochvil@redhat.com>
PR build/18033 PR build/18033

6
gdb/amd64fbsd-tdep.c
View file

@ -37,12 +37,16 @@
static CORE_ADDR static CORE_ADDR
amd64fbsd_sigcontext_addr (struct frame_info *this_frame) 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; CORE_ADDR sp;
gdb_byte buf[8];
/* The `struct sigcontext' (which really is an `ucontext_t' on /* The `struct sigcontext' (which really is an `ucontext_t' on
FreeBSD/amd64) lives at a fixed offset in the signal frame. See FreeBSD/amd64) lives at a fixed offset in the signal frame. See
<machine/sigframe.h>. */ <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; return sp + 16;
} }