diff options
Diffstat (limited to 'gdb/sparc64obsd-tdep.c')
-rw-r--r-- | gdb/sparc64obsd-tdep.c | 41 |
1 files changed, 24 insertions, 17 deletions
diff --git a/gdb/sparc64obsd-tdep.c b/gdb/sparc64obsd-tdep.c index 162f11d386e..5f8cb3bc480 100644 --- a/gdb/sparc64obsd-tdep.c +++ b/gdb/sparc64obsd-tdep.c @@ -61,7 +61,7 @@ sparc64obsd_supply_gregset (const struct regset *regset, { const char *regs = gregs; - sparc64_supply_gregset (regset->descr, regcache, regnum, regs); + sparc64_supply_gregset (&sparc64obsd_core_gregset, regcache, regnum, regs); sparc64_supply_fpregset (regcache, regnum, regs + 288); } @@ -74,30 +74,40 @@ sparc64obsd_supply_gregset (const struct regset *regset, The signal trampoline will be mapped at an address that is page aligned. We recognize the signal trampoline by the looking for the - sigreturn system call. */ + sigreturn system call. The offset where we can find the code that + makes this system call varies from release to release. For OpenBSD + 3.6 and later releases we can find the code at offset 0xec. For + OpenBSD 3.5 and earlier releases, we find it at offset 0xe8. */ static const int sparc64obsd_page_size = 8192; +static const int sparc64obsd_sigreturn_offset[] = { 0xec, 0xe8, -1 }; static int sparc64obsd_pc_in_sigtramp (CORE_ADDR pc, char *name) { CORE_ADDR start_pc = (pc & ~(sparc64obsd_page_size - 1)); unsigned long insn; + const int *offset; if (name) return 0; - /* Check for "restore %g0, SYS_sigreturn, %g1". */ - insn = sparc_fetch_instruction (start_pc + 0xe8); - if (insn != 0x83e82067) - return 0; + for (offset = sparc64obsd_sigreturn_offset; *offset != -1; offset++) + { + /* Check for "restore %g0, SYS_sigreturn, %g1". */ + insn = sparc_fetch_instruction (start_pc + *offset); + if (insn != 0x83e82067) + continue; - /* Check for "t ST_SYSCALL". */ - insn = sparc_fetch_instruction (start_pc + 0xf0); - if (insn != 0x91d02000) - return 0; + /* Check for "t ST_SYSCALL". */ + insn = sparc_fetch_instruction (start_pc + *offset + 8); + if (insn != 0x91d02000) + continue; + + return 1; + } - return 1; + return 0; } static struct sparc_frame_cache * @@ -154,8 +164,8 @@ sparc64obsd_frame_prev_register (struct frame_info *next_frame, struct sparc_frame_cache *cache = sparc64obsd_frame_cache (next_frame, this_cache); - trad_frame_prev_register (next_frame, cache->saved_regs, regnum, - optimizedp, lvalp, addrp, realnump, valuep); + trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum, + optimizedp, lvalp, addrp, realnump, valuep); } static const struct frame_unwind sparc64obsd_frame_unwind = @@ -184,12 +194,9 @@ sparc64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - tdep->gregset = XMALLOC (struct regset); - tdep->gregset->descr = &sparc64obsd_core_gregset; - tdep->gregset->supply_regset = sparc64obsd_supply_gregset; + tdep->gregset = regset_alloc (gdbarch, sparc64obsd_supply_gregset, NULL); tdep->sizeof_gregset = 832; - set_gdbarch_deprecated_pc_in_sigtramp (gdbarch, sparc64obsd_pc_in_sigtramp); frame_unwind_append_sniffer (gdbarch, sparc64obsd_sigtramp_frame_sniffer); sparc64_init_abi (info, gdbarch); |