diff options
Diffstat (limited to 'gdb/sparc64obsd-tdep.c')
| -rw-r--r-- | gdb/sparc64obsd-tdep.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/gdb/sparc64obsd-tdep.c b/gdb/sparc64obsd-tdep.c index b74679c..8ad88b5 100644 --- a/gdb/sparc64obsd-tdep.c +++ b/gdb/sparc64obsd-tdep.c @@ -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; |