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* spu-tdep.c (spu_frame_unwind_cache): Add comment.

This commit is contained in:
Ulrich Weigand 2007-05-11 20:09:29 +00:00
parent aa67235e6e
commit 0a44cb368d
2 changed files with 12 additions and 2 deletions
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4
gdb/ChangeLog
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@ -1,3 +1,7 @@
2007-05-11 Ulrich Weigand <uweigand@de.ibm.com>
* spu-tdep.c (spu_frame_unwind_cache): Add comment.
2007-05-11 Ulrich Weigand <uweigand@de.ibm.com>
* breakpoint.c (remove_breakpoint): Do not remove software

10
gdb/spu-tdep.c
View File

@ -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));