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* stack.c (frame_info): Use frame_register_unwind instead of

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saved_regs.  Mention when the SP is on the stack or in a register.
* frame.h (frame_register_unwind_ftype): Define.  Document.
(struct frame_info): Add field register_unwind and
register_unwind_cache.
(frame_register_unwind): Declare.
(generic_unwind_get_saved_register): Declare.
* frame.c (frame_register_unwind): New function.
(generic_unwind_get_saved_register): New function.
* blockframe.c (generic_call_dummy_register_unwind): New function.
(frame_saved_regs_register_unwind): New function.
(set_unwind_by_pc): New function.
(create_new_frame): New function.
(get_prev_frame): New function.
This commit is contained in:
Andrew Cagney 2002-06-01 20:44:21 +00:00
parent 3352e23e7a
commit 4f4608125d
5 changed files with 414 additions and 31 deletions
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105
gdb/stack.c
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@ -929,39 +929,84 @@ frame_info (char *addr_exp, int from_tty)
}
}
FRAME_INIT_SAVED_REGS (fi);
if (fi->saved_regs != NULL)
{
/* The sp is special; what's returned isn't the save address, but
actually the value of the previous frame's sp. */
printf_filtered (" Previous frame's sp is ");
print_address_numeric (fi->saved_regs[SP_REGNUM], 1, gdb_stdout);
printf_filtered ("\n");
count = 0;
numregs = NUM_REGS + NUM_PSEUDO_REGS;
for (i = 0; i < numregs; i++)
if (fi->saved_regs[i] && i != SP_REGNUM)
if (fi->saved_regs == NULL)
FRAME_INIT_SAVED_REGS (fi);
/* Print as much information as possible on the location of all the
registers. */
{
enum lval_type lval;
int optimized;
CORE_ADDR addr;
int realnum;
int count;
int i;
int need_nl = 1;
/* The sp is special; what's displayed isn't the save address, but
the value of the previous frame's sp. This is a legacy thing,
at one stage the frame cached the previous frame's SP instead
of its address, hence it was easiest to just display the cached
value. */
if (SP_REGNUM >= 0)
{
/* Find out the location of the saved stack pointer with out
actually evaluating it. */
frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr,
&realnum, NULL);
if (!optimized && lval == not_lval)
{
if (count == 0)
puts_filtered (" Saved registers:\n ");
else
puts_filtered (",");
wrap_here (" ");
printf_filtered (" %s at ", REGISTER_NAME (i));
print_address_numeric (fi->saved_regs[i], 1, gdb_stdout);
count++;
void *value = alloca (MAX_REGISTER_RAW_SIZE);
CORE_ADDR sp;
frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr,
&realnum, value);
sp = extract_address (value, REGISTER_RAW_SIZE (SP_REGNUM));
printf_filtered (" Previous frame's sp is ");
print_address_numeric (sp, 1, gdb_stdout);
printf_filtered ("\n");
need_nl = 0;
}
if (count)
puts_filtered ("\n");
}
else
{
/* We could get some information about saved registers by
calling get_saved_register on each register. Which info goes
with which frame is necessarily lost, however, and I suspect
that the users don't care whether they get the info. */
else if (!optimized && lval == lval_memory)
{
printf_filtered (" Previous frame's sp at ");
print_address_numeric (addr, 1, gdb_stdout);
printf_filtered ("\n");
need_nl = 0;
}
else if (!optimized && lval == lval_register)
{
printf_filtered (" Previous frame's sp in %s\n",
REGISTER_NAME (realnum));
need_nl = 0;
}
/* else keep quiet. */
}
count = 0;
numregs = NUM_REGS + NUM_PSEUDO_REGS;
for (i = 0; i < numregs; i++)
if (i != SP_REGNUM)
{
/* Find out the location of the saved register without
fetching the corresponding value. */
frame_register_unwind (fi, i, &optimized, &lval, &addr, &realnum,
NULL);
/* For moment, only display registers that were saved on the
stack. */
if (!optimized && lval == lval_memory)
{
if (count == 0)
puts_filtered (" Saved registers:\n ");
else
puts_filtered (",");
wrap_here (" ");
printf_filtered (" %s at ", REGISTER_NAME (i));
print_address_numeric (addr, 1, gdb_stdout);
count++;
}
}
if (count || need_nl)
puts_filtered ("\n");
}
}
}
#if 0