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* dbxread.c (process_one_symbol): Handle stabs-in-som just like

Browse Source 
stabs-in-elf.
        (pastab_build_psymtabs): Likewise.

        * hppa-tdep.c: Change all comments to reference %r3 or frame pointer
        rather than %r4.
        (frame_chain, skip_prologue, dig_rp_from_stack): Handle %r3 as the
        frame pointer.

        * config/pa/tm-hppa.h (FP_REGNUM): Define as %r3.
        (FIND_FRAME_SAVED_REGS): Handle %r3 as frame pointer.
        (CALL_DUMMY): Likewise.
This commit is contained in:
Jeff Law
1993-12-27 04:46:05 +00:00
parent b02fd8caa2
commit 2f8c3639fa
3 changed files with 62 additions and 38 deletions
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36
gdb/hppa-tdep.c
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@@ -580,12 +580,12 @@ frame_chain (frame)
several areas on the stack.
Walk from the current frame to the innermost frame examining
unwind descriptors to determine if %r4 ever gets saved into the
unwind descriptors to determine if %r3 ever gets saved into the
stack. If so return whatever value got saved into the stack.
If it was never saved in the stack, then the value in %r4 is still
If it was never saved in the stack, then the value in %r3 is still
valid, so use it.
We use information from unwind descriptors to determine if %r4
We use information from unwind descriptors to determine if %r3
is saved into the stack (Entry_GR field has this information). */
while (frame)
@@ -603,8 +603,8 @@ frame_chain (frame)
}
/* Entry_GR specifies the number of callee-saved general registers
saved in the stack. It starts at %r3, so %r4 would be 2. */
if (u->Entry_GR >= 2 || u->Save_SP)
saved in the stack. It starts at %r3, so %r3 would be 1. */
if (u->Entry_GR >= 1 || u->Save_SP)
break;
else
frame = frame->next;
@@ -616,15 +616,15 @@ frame_chain (frame)
pointer. */
if (u->Save_SP)
return read_memory_integer (frame->frame, 4);
/* %r4 was saved somewhere in the stack. Dig it out. */
/* %r3 was saved somewhere in the stack. Dig it out. */
else
return dig_fp_from_stack (frame, u);
}
else
{
/* The value in %r4 was never saved into the stack (thus %r4 still
/* The value in %r3 was never saved into the stack (thus %r3 still
holds the value of the previous frame pointer). */
return read_register (4);
return read_register (FP_REGNUM);
}
}
@@ -639,14 +639,14 @@ dig_fp_from_stack (frame, u)
{
CORE_ADDR pc = u->region_start;
/* Search the function for the save of %r4. */
/* Search the function for the save of %r3. */
while (pc != u->region_end)
{
char buf[4];
unsigned long inst;
int status;
/* We need only look for the standard stw %r4,X(%sp) instruction,
/* We need only look for the standard stw %r3,X(%sp) instruction,
the other variants (eg stwm) are only used on the first register
save (eg %r3). */
status = target_read_memory (pc, buf, 4);
@@ -655,10 +655,10 @@ dig_fp_from_stack (frame, u)
if (status != 0)
memory_error (status, pc);
/* Check for stw %r4,X(%sp). */
if ((inst & 0xffffc000) == 0x6bc40000)
/* Check for stw %r3,X(%sp). */
if ((inst & 0xffffc000) == 0x6bc30000)
{
/* Found the instruction which saves %r4. The offset (relative
/* Found the instruction which saves %r3. The offset (relative
to this frame) is framesize + immed14 (derived from the
store instruction). */
int offset = (u->Total_frame_size << 3) + extract_14 (inst);
@@ -670,7 +670,7 @@ dig_fp_from_stack (frame, u)
pc += 4;
}
warning ("Unable to find %%r4 in stack.\n");
warning ("Unable to find %%r3 in stack.\n");
return 0;
}
@@ -1223,14 +1223,14 @@ skip_prologue(pc)
if (inst == 0x6BC23FD9) /* stw rp,-20(sp) */
{
if (read_memory_integer (pc + 4, 4) == 0x8040241) /* copy r4,r1 */
if (read_memory_integer (pc + 4, 4) == 0x8030241) /* copy r3,r1 */
pc += 16;
else if ((read_memory_integer (pc + 4, 4) & ~MASK_14) == 0x68810000) /* stw r1,(r4) */
else if ((read_memory_integer (pc + 4, 4) & ~MASK_14) == 0x68710000) /* stw r1,(r3) */
pc += 8;
}
else if (read_memory_integer (pc, 4) == 0x8040241) /* copy r4,r1 */
else if (read_memory_integer (pc, 4) == 0x8030241) /* copy r3,r1 */
pc += 12;
else if ((read_memory_integer (pc, 4) & ~MASK_14) == 0x68810000) /* stw r1,(r4) */
else if ((read_memory_integer (pc, 4) & ~MASK_14) == 0x68710000) /* stw r1,(r3) */
pc += 4;
return pc;