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2002-11-05 Andrew Cagney <ac131313@redhat.com>

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* gdbarch.sh (GET_SAVED_REGISTER): Change to a predicate function.
	* gdbarch.h, gdbarch.c: Regnerate.
	* frame.h (frame_register): Declare.
	* frame.c (frame_register): New function.
	(get_saved_register): Test GET_SAVED_REGISTER_P before calling
	GET_SAVED_REGISTER, otherwize call
	generic_unwind_get_saved_register.
	(frame_register_read): Use frame_register instead of
	get_saved_register.
This commit is contained in:
Andrew Cagney 2002-11-05 21:44:05 +00:00
parent b7c642601c
commit a216a32234
6 changed files with 125 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

78
gdb/frame.c
View file

@ -124,6 +124,66 @@ frame_register_unwind (struct frame_info *frame, int regnum,
optimizedp, lvalp, addrp, realnump, bufferp);
}
void
frame_register (struct frame_info *frame, int regnum,
int *optimizedp, enum lval_type *lvalp,
CORE_ADDR *addrp, int *realnump, void *bufferp)
{
/* 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); */
/* Ulgh! Old code that, for lval_register, sets ADDRP to the offset
of the register in the register cache. It should instead return
the REGNUM corresponding to that register. Translate the . */
if (GET_SAVED_REGISTER_P ())
{
GET_SAVED_REGISTER (bufferp, optimizedp, addrp, frame, regnum, lvalp);
/* Compute the REALNUM if the caller wants it. */
if (*lvalp == lval_register)
{
int regnum;
for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
{
if (*addrp == register_offset_hack (current_gdbarch, regnum))
{
*realnump = regnum;
return;
}
}
internal_error (__FILE__, __LINE__,
"Failed to compute the register number corresponding"
" to 0x%s", paddr_d (*addrp));
}
*realnump = -1;
return;
}
/* 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, realnump,
bufferp);
else
frame_register_unwind (frame->next, regnum, optimizedp, lvalp, addrp,
realnump, bufferp);
}
void
frame_unwind_signed_register (struct frame_info *frame, int regnum,
LONGEST *val)
@ -240,7 +300,13 @@ get_saved_register (char *raw_buffer,
int regnum,
enum lval_type *lval)
{
GET_SAVED_REGISTER (raw_buffer, optimized, addrp, frame, regnum, lval);
if (GET_SAVED_REGISTER_P ())
{
GET_SAVED_REGISTER (raw_buffer, optimized, addrp, frame, regnum, lval);
return;
}
generic_unwind_get_saved_register (raw_buffer, optimized, addrp, frame,
regnum, lval);
}
/* frame_register_read ()
@ -253,9 +319,11 @@ get_saved_register (char *raw_buffer,
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);
int optimized;
enum lval_type lval;
CORE_ADDR addr;
int realnum;
frame_register (frame, regnum, &optimized, &lval, &addr, &realnum, myaddr);
/* FIXME: cagney/2002-05-15: This test, is just bogus.
@ -267,7 +335,7 @@ frame_register_read (struct frame_info *frame, int regnum, void *myaddr)
if (register_cached (regnum) < 0)
return 0; /* register value not available */
return !optim;
return !optimized;
}