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authorMark Alexander <marka@cygnus>1997-08-06 06:59:03 +0000
committerMark Alexander <marka@cygnus>1997-08-06 06:59:03 +0000
commitac210a14ca2f02360e7afad86933dd32d80f5428 (patch)
tree1b188bb8991ed4388b41d9556a86049812822bd2 /gdb
parentc031a0bdf6bb1f5cdf16b338ba5c5f4e08fbc8f1 (diff)
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* tic80-tdep.c (tic80_init_extra_frame_info): Allow zero
as a valid SP-relative offset of a saved register.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog5
-rw-r--r--gdb/tic80-tdep.c21
2 files changed, 20 insertions, 6 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 25b098f..e78571d 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -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)
* hpread.c (hpread_read_struct_type): Use accessor macros rather
diff --git a/gdb/tic80-tdep.c b/gdb/tic80-tdep.c
index 5d1cc64..9648d55 100644
--- a/gdb/tic80-tdep.c
+++ b/gdb/tic80-tdep.c
@@ -176,7 +176,10 @@ tic80_init_extra_frame_info (fi)
if (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))
{
@@ -194,12 +197,18 @@ tic80_init_extra_frame_info (fi)
if (!fi->next) /* this is the innermost frame? */
fi->frame = read_register (fi->framereg);
else /* not the innermost frame */
- if (fi->framereg == FP_REGNUM) /* we have an FP */
- if (fi->next->fsr.regs[FP_REGNUM] != 0) /* caller saved our FP */
- fi->frame = read_memory_integer (fi->next->fsr.regs[FP_REGNUM], 4);
+ /* If this function uses FP as the frame register, and the function
+ 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);
+
+ /* Convert SP-relative offsets of saved registers to real addresses. */
for (reg = 0; reg < NUM_REGS; reg++)
- if (fi->fsr.regs[reg] != 0)
- fi->fsr.regs[reg] += fi->frame - fi->frameoffset;
+ if (fi->fsr.regs[reg] == (unsigned) -1)
+ fi->fsr.regs[reg] = 0; /* unused entry */
+ else
+ fi->fsr.regs[reg] += fi->frame - fi->frameoffset;
}
}