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* sparc64obsd-tdep.c (sparc64obsd_pc_in_sigtramp): Adjust for

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changed signal trampoline in OpenBSD 3.5-current.
This commit is contained in:
Mark Kettenis 2004-07-23 13:43:36 +00:00
parent 90f3cecd6a
commit 24f033e800
2 changed files with 19 additions and 3 deletions
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3
gdb/ChangeLog
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@ -1,5 +1,8 @@
2004-07-23 Mark Kettenis <kettenis@gnu.org>
* sparc64obsd-tdep.c (sparc64obsd_pc_in_sigtramp): Adjust for
changed signal trampoline in OpenBSD 3.5-current.
* sparc64nbsd-nat.c: Include "regcache.h", <sys/types.h>,
<machine/pcb.h> and "bsd-kvm.h".
(sparc64nbsd_supply_pcb): New function.

19
gdb/sparc64obsd-tdep.c
View File

@ -83,17 +83,30 @@ sparc64obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
CORE_ADDR start_pc = (pc & ~(sparc64obsd_page_size - 1));
unsigned long insn;
int offset = 0;
if (name)
return 0;
retry:
/* Check for "restore %g0, SYS_sigreturn, %g1". */
insn = sparc_fetch_instruction (start_pc + 0xe8);
insn = sparc_fetch_instruction (start_pc + offset + 0xec);
if (insn != 0x83e82067)
return 0;
{
if (offset == 0)
{
/* In OpenBSD 3.5 and earlier releases, the code
implementing the sigreturn system call was at a different
offset within the signal trampoline. Try again. */
offset = -4;
goto retry;
}
return 0;
}
/* Check for "t ST_SYSCALL". */
insn = sparc_fetch_instruction (start_pc + 0xf0);
insn = sparc_fetch_instruction (start_pc + offset + 0xf4);
if (insn != 0x91d02000)
return 0;