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* tic80-tdep.c (tic80_init_extra_frame_info): Allow zero

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as a valid SP-relative offset of a saved register.
This commit is contained in:
Mark Alexander
1997-08-06 06:59:03 +00:00
parent c031a0bdf6
commit ac210a14ca
2 changed files with 20 additions and 6 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
Tue Aug 5 23:56:14 1997 Mark Alexander <marka@cygnus.com>
* tic80-tdep.c (tic80_init_extra_frame_info): Allow zero
as a valid SP-relative offset of a saved register.
Wed Aug 6 00:24:08 1997 Jeffrey A Law (law@cygnus.com) Wed Aug 6 00:24:08 1997 Jeffrey A Law (law@cygnus.com)
* hpread.c (hpread_read_struct_type): Use accessor macros rather * hpread.c (hpread_read_struct_type): Use accessor macros rather

17
gdb/tic80-tdep.c
View File

@ -176,7 +176,10 @@ tic80_init_extra_frame_info (fi)
if (fi->next) if (fi->next)
fi->pc = FRAME_SAVED_PC (fi->next); fi->pc = FRAME_SAVED_PC (fi->next);
memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs); /* Because zero is a valid register offset relative to SP, we initialize
the offsets to -1 to indicate unused entries. */
for (reg = 0; reg < NUM_REGS; reg++)
fi->fsr.regs[reg] = -1;
if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
{ {
@ -194,11 +197,17 @@ tic80_init_extra_frame_info (fi)
if (!fi->next) /* this is the innermost frame? */ if (!fi->next) /* this is the innermost frame? */
fi->frame = read_register (fi->framereg); fi->frame = read_register (fi->framereg);
else /* not the innermost frame */ else /* not the innermost frame */
if (fi->framereg == FP_REGNUM) /* we have an FP */ /* If this function uses FP as the frame register, and the function
if (fi->next->fsr.regs[FP_REGNUM] != 0) /* caller saved our FP */ it called saved the FP, get the saved FP. */
if (fi->framereg == FP_REGNUM &&
fi->next->fsr.regs[FP_REGNUM] != (unsigned) -1)
fi->frame = read_memory_integer (fi->next->fsr.regs[FP_REGNUM], 4); fi->frame = read_memory_integer (fi->next->fsr.regs[FP_REGNUM], 4);
/* Convert SP-relative offsets of saved registers to real addresses. */
for (reg = 0; reg < NUM_REGS; reg++) for (reg = 0; reg < NUM_REGS; reg++)
if (fi->fsr.regs[reg] != 0) if (fi->fsr.regs[reg] == (unsigned) -1)
fi->fsr.regs[reg] = 0; /* unused entry */
else
fi->fsr.regs[reg] += fi->frame - fi->frameoffset; fi->fsr.regs[reg] += fi->frame - fi->frameoffset;
} }
} }