diff options
Diffstat (limited to 'gdb/frame.c')
| -rw-r--r-- | gdb/frame.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/gdb/frame.c b/gdb/frame.c index 8d393050c68..93258d7720e 100644 --- a/gdb/frame.c +++ b/gdb/frame.c @@ -1221,10 +1221,17 @@ get_prev_frame_1 (struct frame_info *this_frame) have different frame IDs, the new frame will be bogus; two functions can't share a register save slot for the PC. This can happen when the prologue analyzer finds a stack adjustment, but - no PC save. This check does assume that the "PC register" is - roughly a traditional PC, even if the gdbarch_unwind_pc method - frobs it. */ + no PC save. + + This check does assume that the "PC register" is roughly a + traditional PC, even if the gdbarch_unwind_pc method adjusts + it (we do not rely on the value, only on the unwound PC being + dependent on this value). A potential improvement would be + to have the frame prev_pc method and the gdbarch unwind_pc + method set the same lval and location information as + frame_register_unwind. */ if (this_frame->level > 0 + && PC_REGNUM >= 0 && get_frame_type (this_frame) == NORMAL_FRAME && get_frame_type (this_frame->next) == NORMAL_FRAME) { |