diff options
Diffstat (limited to 'gdb/rs6000-tdep.c')
| -rw-r--r-- | gdb/rs6000-tdep.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c index 18fe4e9..796b082 100644 --- a/gdb/rs6000-tdep.c +++ b/gdb/rs6000-tdep.c @@ -564,12 +564,16 @@ function_frame_info (pc, fdata) { unsigned int tmp; register unsigned int op; + char buf[4]; fdata->offset = 0; fdata->saved_gpr = fdata->saved_fpr = fdata->alloca_reg = -1; fdata->frameless = 1; - op = read_memory_integer (pc, 4); + /* Do not error out if we can't access the instructions. */ + if (target_read_memory (pc, buf, 4)) + return; + op = extract_unsigned_integer (buf, 4); if (op == 0x7c0802a6) { /* mflr r0 */ pc += 4; op = read_memory_integer (pc, 4); @@ -1094,17 +1098,7 @@ rs6000_frame_chain (thisframe) if (inside_entry_file ((thisframe)->pc)) return 0; if (thisframe->signal_handler_caller) - { - /* This was determined by experimentation on AIX 3.2. Perhaps - it corresponds to some offset in /usr/include/sys/user.h or - something like that. Using some system include file would - have the advantage of probably being more robust in the face - of OS upgrades, but the disadvantage of being wrong for - cross-debugging. */ - -#define SIG_FRAME_FP_OFFSET 284 - fp = read_memory_integer (thisframe->frame + SIG_FRAME_FP_OFFSET, 4); - } + fp = read_memory_integer (thisframe->frame + SIG_FRAME_FP_OFFSET, 4); else fp = read_memory_integer ((thisframe)->frame, 4); |