diff options
Diffstat (limited to 'gdb/spu-tdep.c')
| -rw-r--r-- | gdb/spu-tdep.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gdb/spu-tdep.c b/gdb/spu-tdep.c index e25d66e..0d82a74 100644 --- a/gdb/spu-tdep.c +++ b/gdb/spu-tdep.c @@ -743,13 +743,19 @@ spu_frame_unwind_cache (struct frame_info *next_frame, /* The previous SP is equal to the CFA. */ trad_frame_set_value (info->saved_regs, SPU_SP_REGNUM, info->frame_base); - /* The previous PC comes from the link register. In the case - of overlay return stubs, we unwind to the real return address. */ + /* Read full contents of the unwound link register in order to + be able to determine the return address. */ if (trad_frame_addr_p (info->saved_regs, SPU_LR_REGNUM)) target_read_memory (info->saved_regs[SPU_LR_REGNUM].addr, buf, 16); else frame_unwind_register (next_frame, SPU_LR_REGNUM, buf); + /* Normally, the return address is contained in the slot 0 of the + link register, and slots 1-3 are zero. For an overlay return, + slot 0 contains the address of the overlay manager return stub, + slot 1 contains the partition number of the overlay section to + be returned to, and slot 2 contains the return address within + that section. Return the latter address in that case. */ if (extract_unsigned_integer (buf + 8, 4) != 0) trad_frame_set_value (info->saved_regs, SPU_PC_REGNUM, extract_unsigned_integer (buf + 8, 4)); |