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* s390-tdep.c (s390_get_frame_info): Recognize spills of reg

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arguments into their stack slots.
This commit is contained in:
Jim Blandy 2001-12-05 00:20:37 +00:00
parent 7286245e1f
commit 7666f43c32
2 changed files with 20 additions and 0 deletions
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3
gdb/ChangeLog
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@ -1,5 +1,8 @@
2001-12-04 Jim Blandy <jimb@redhat.com>
* s390-tdep.c (s390_get_frame_info): Recognize spills of reg
arguments into their stack slots.
* s390-tdep.c (s390_get_frame_info): More doc fixes.
* s390-tdep.c (s390_get_frame_info): Doc fixes.

17
gdb/s390-tdep.c
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@ -405,6 +405,23 @@ s390_get_frame_info (CORE_ADDR pc, struct frame_extra_info *fextra_info,
continue;
}
/* Check for an fp-relative STG or ST. This is probably
spilling an argument from a register out into a stack slot.
This could be a user instruction, but if we haven't included
any other suspicious instructions in the prologue, this
could only be an initializing store, which isn't too bad to
skip. The consequences of not including arg-to-stack spills
are more serious, though --- you don't see the proper values
of the arguments. */
if ((save_link_state == 3 || save_link_state == 4)
&& instr[0] == 0x50 /* st %rA, D(%rX,%rB) */
&& (instr[1] & 0xf) == 0 /* %rX is zero, no index reg */
&& ((instr[2] >> 4) & 0xf) == frame_pointer_regidx)
{
valid_prologue = 1;
continue;
}
/* check for STD */
if (instr[0] == 0x60 && (instr[2] >> 4) == 0xf)
{