mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-05 02:47:05 +00:00
101dcfbe4a
selected_frame_address and selected_level with field selected_frame_id. (save_inferior_status): Update. Use get_frame_id. (struct restore_selected_frame_args): Delete. (restore_selected_frame): Update. Use frame_find_by_id. (restore_inferior_status): Update. * breakpoint.h (struct breakpoint): Change type of watchpoint_frame to frame_id. * breakpoint.c (insert_breakpoints): Use frame_find_by_id. Remove call to get_current_frame. (do_enable_breakpoint): Use frame_find_by_id. Remove call to get_current_frame. (watchpoint_check): Use frame_find_by_id. * frame.h (record_selected_frame): Delete declaration. * stack.c (record_selected_frame): Delete function. * frame.h (struct frame_id): Define. (get_frame_id): Declare. (frame_find_by_id): Declare. * frame.c (frame_find_by_id): New function. (get_frame_id): New function.
242 lines
7.4 KiB
C
242 lines
7.4 KiB
C
/* Cache and manage frames for GDB, the GNU debugger.
|
|
|
|
Copyright 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000,
|
|
2001, 2002 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include "defs.h"
|
|
#include "frame.h"
|
|
#include "target.h"
|
|
#include "value.h"
|
|
#include "inferior.h" /* for inferior_ptid */
|
|
#include "regcache.h"
|
|
#include "gdb_assert.h"
|
|
|
|
/* Return a frame uniq ID that can be used to, later re-find the
|
|
frame. */
|
|
|
|
void
|
|
get_frame_id (struct frame_info *fi, struct frame_id *id)
|
|
{
|
|
if (fi == NULL)
|
|
{
|
|
id->base = 0;
|
|
id->pc = 0;
|
|
}
|
|
else
|
|
{
|
|
id->base = FRAME_FP (fi);
|
|
id->pc = fi->pc;
|
|
}
|
|
}
|
|
|
|
struct frame_info *
|
|
frame_find_by_id (struct frame_id id)
|
|
{
|
|
struct frame_info *frame;
|
|
|
|
/* ZERO denotes the null frame, let the caller decide what to do
|
|
about it. Should it instead return get_current_frame()? */
|
|
if (id.base == 0 && id.pc == 0)
|
|
return NULL;
|
|
|
|
for (frame = get_current_frame ();
|
|
frame != NULL;
|
|
frame = get_prev_frame (frame))
|
|
{
|
|
if (INNER_THAN (FRAME_FP (frame), id.base))
|
|
/* ``inner/current < frame < id.base''. Keep looking along
|
|
the frame chain. */
|
|
continue;
|
|
if (INNER_THAN (id.base, FRAME_FP (frame)))
|
|
/* ``inner/current < id.base < frame''. Oops, gone past it.
|
|
Just give up. */
|
|
return NULL;
|
|
/* FIXME: cagney/2002-04-21: This isn't sufficient. It should
|
|
use id.pc to check that the two frames belong to the same
|
|
function. Otherwise we'll do things like match dummy frames
|
|
or mis-match frameless functions. However, until someone
|
|
notices, stick with the existing behavour. */
|
|
return frame;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* FIND_SAVED_REGISTER ()
|
|
|
|
Return the address in which frame FRAME's value of register REGNUM
|
|
has been saved in memory. Or return zero if it has not been saved.
|
|
If REGNUM specifies the SP, the value we return is actually
|
|
the SP value, not an address where it was saved. */
|
|
|
|
CORE_ADDR
|
|
find_saved_register (struct frame_info *frame, int regnum)
|
|
{
|
|
register struct frame_info *frame1 = NULL;
|
|
register CORE_ADDR addr = 0;
|
|
|
|
if (frame == NULL) /* No regs saved if want current frame */
|
|
return 0;
|
|
|
|
/* Note that this next routine assumes that registers used in
|
|
frame x will be saved only in the frame that x calls and
|
|
frames interior to it. This is not true on the sparc, but the
|
|
above macro takes care of it, so we should be all right. */
|
|
while (1)
|
|
{
|
|
QUIT;
|
|
frame1 = get_next_frame (frame);
|
|
if (frame1 == 0)
|
|
break;
|
|
frame = frame1;
|
|
FRAME_INIT_SAVED_REGS (frame1);
|
|
if (frame1->saved_regs[regnum])
|
|
addr = frame1->saved_regs[regnum];
|
|
}
|
|
|
|
return addr;
|
|
}
|
|
|
|
void
|
|
frame_register_unwind (struct frame_info *frame, int regnum,
|
|
int *optimizedp, enum lval_type *lvalp,
|
|
CORE_ADDR *addrp, int *realnump, void *bufferp)
|
|
{
|
|
struct frame_unwind_cache *cache;
|
|
|
|
/* Require all but BUFFERP to be valid. A NULL BUFFERP indicates
|
|
that the value proper does not need to be fetched. */
|
|
gdb_assert (optimizedp != NULL);
|
|
gdb_assert (lvalp != NULL);
|
|
gdb_assert (addrp != NULL);
|
|
gdb_assert (realnump != NULL);
|
|
/* gdb_assert (bufferp != NULL); */
|
|
|
|
/* NOTE: cagney/2002-04-14: It would be nice if, instead of a
|
|
special case, there was always an inner frame dedicated to the
|
|
hardware registers. Unfortunatly, there is too much unwind code
|
|
around that looks up/down the frame chain while making the
|
|
assumption that each frame level is using the same unwind code. */
|
|
|
|
if (frame == NULL)
|
|
{
|
|
/* We're in the inner-most frame, get the value direct from the
|
|
register cache. */
|
|
*optimizedp = 0;
|
|
*lvalp = lval_register;
|
|
*addrp = 0;
|
|
/* Should this code test ``register_cached (regnum) < 0'' and do
|
|
something like set realnum to -1 when the register isn't
|
|
available? */
|
|
*realnump = regnum;
|
|
if (bufferp)
|
|
read_register_gen (regnum, bufferp);
|
|
return;
|
|
}
|
|
|
|
/* Ask this frame to unwind its register. */
|
|
frame->register_unwind (frame, &frame->register_unwind_cache, regnum,
|
|
optimizedp, lvalp, addrp, realnump, bufferp);
|
|
}
|
|
|
|
|
|
void
|
|
generic_unwind_get_saved_register (char *raw_buffer,
|
|
int *optimizedp,
|
|
CORE_ADDR *addrp,
|
|
struct frame_info *frame,
|
|
int regnum,
|
|
enum lval_type *lvalp)
|
|
{
|
|
int optimizedx;
|
|
CORE_ADDR addrx;
|
|
int realnumx;
|
|
enum lval_type lvalx;
|
|
|
|
if (!target_has_registers)
|
|
error ("No registers.");
|
|
|
|
/* Keep things simple, ensure that all the pointers (except valuep)
|
|
are non NULL. */
|
|
if (optimizedp == NULL)
|
|
optimizedp = &optimizedx;
|
|
if (lvalp == NULL)
|
|
lvalp = &lvalx;
|
|
if (addrp == NULL)
|
|
addrp = &addrx;
|
|
|
|
/* Reached the the bottom (youngest, inner most) of the frame chain
|
|
(youngest, inner most) frame, go direct to the hardware register
|
|
cache (do not pass go, do not try to cache the value, ...). The
|
|
unwound value would have been cached in frame->next but that
|
|
doesn't exist. This doesn't matter as the hardware register
|
|
cache is stopping any unnecessary accesses to the target. */
|
|
|
|
/* NOTE: cagney/2002-04-14: It would be nice if, instead of a
|
|
special case, there was always an inner frame dedicated to the
|
|
hardware registers. Unfortunatly, there is too much unwind code
|
|
around that looks up/down the frame chain while making the
|
|
assumption that each frame level is using the same unwind code. */
|
|
|
|
if (frame == NULL)
|
|
frame_register_unwind (NULL, regnum, optimizedp, lvalp, addrp, &realnumx,
|
|
raw_buffer);
|
|
else
|
|
frame_register_unwind (frame->next, regnum, optimizedp, lvalp, addrp,
|
|
&realnumx, raw_buffer);
|
|
}
|
|
|
|
void
|
|
get_saved_register (char *raw_buffer,
|
|
int *optimized,
|
|
CORE_ADDR *addrp,
|
|
struct frame_info *frame,
|
|
int regnum,
|
|
enum lval_type *lval)
|
|
{
|
|
GET_SAVED_REGISTER (raw_buffer, optimized, addrp, frame, regnum, lval);
|
|
}
|
|
|
|
/* frame_register_read ()
|
|
|
|
Find and return the value of REGNUM for the specified stack frame.
|
|
The number of bytes copied is REGISTER_RAW_SIZE (REGNUM).
|
|
|
|
Returns 0 if the register value could not be found. */
|
|
|
|
int
|
|
frame_register_read (struct frame_info *frame, int regnum, void *myaddr)
|
|
{
|
|
int optim;
|
|
get_saved_register (myaddr, &optim, (CORE_ADDR *) NULL, frame,
|
|
regnum, (enum lval_type *) NULL);
|
|
|
|
/* FIXME: cagney/2002-05-15: This test, is just bogus.
|
|
|
|
It indicates that the target failed to supply a value for a
|
|
register because it was "not available" at this time. Problem
|
|
is, the target still has the register and so get saved_register()
|
|
may be returning a value saved on the stack. */
|
|
|
|
if (register_cached (regnum) < 0)
|
|
return 0; /* register value not available */
|
|
|
|
return !optim;
|
|
}
|