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/* Native support for the SGI Iris running IRIX version 4, for GDB.
Copyright 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
Implemented for Irix 4.x by Garrett A. Wollman.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
#include <sys/time.h>
#include <sys/procfs.h>
#include <setjmp.h> /* For JB_XXX. */
/* Size of elements in jmpbuf */
#define JB_ELEMENT_SIZE 4
typedef unsigned int greg_t; /* why isn't this defined? */
/*
* See the comment in m68k-tdep.c regarding the utility of these functions.
*/
void
supply_gregset (gregsetp)
gregset_t *gregsetp;
{
register int regi;
register greg_t *regp = (greg_t *)(gregsetp->gp_regs);
/* FIXME: somewhere, there should be a #define for the meaning
of this magic number 32; we should use that. */
for(regi = 0; regi < 32; regi++)
supply_register (regi, (char *)(regp + regi));
supply_register (PC_REGNUM, (char *)&(gregsetp->gp_pc));
supply_register (HI_REGNUM, (char *)&(gregsetp->gp_mdhi));
supply_register (LO_REGNUM, (char *)&(gregsetp->gp_mdlo));
supply_register (PS_REGNUM, (char *)&(gregsetp->gp_cause));
}
void
fill_gregset (gregsetp, regno)
gregset_t *gregsetp;
int regno;
{
int regi;
register greg_t *regp = (greg_t *)(gregsetp->gp_regs);
extern char registers[];
/* same FIXME as above wrt 32*/
for (regi = 0; regi < 32; regi++)
if ((regno == -1) || (regno == regi))
*(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)];
if ((regno == -1) || (regno == PC_REGNUM))
gregsetp->gp_pc = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)];
if ((regno == -1) || (regno == PS_REGNUM))
gregsetp->gp_cause = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)];
if ((regno == -1) || (regno == HI_REGNUM))
gregsetp->gp_mdhi = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)];
if ((regno == -1) || (regno == LO_REGNUM))
gregsetp->gp_mdlo = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)];
}
/*
* Now we do the same thing for floating-point registers.
* We don't bother to condition on FP0_REGNUM since any
* reasonable MIPS configuration has an R3010 in it.
*
* Again, see the comments in m68k-tdep.c.
*/
void
supply_fpregset (fpregsetp)
fpregset_t *fpregsetp;
{
register int regi;
for (regi = 0; regi < 32; regi++)
supply_register (FP0_REGNUM + regi,
(char *)&fpregsetp->fp_r.fp_regs[regi]);
supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
/* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
}
void
fill_fpregset (fpregsetp, regno)
fpregset_t *fpregsetp;
int regno;
{
int regi;
char *from, *to;
extern char registers[];
for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
{
if ((regno == -1) || (regno == regi))
{
from = (char *) ®isters[REGISTER_BYTE (regi)];
to = (char *) &(fpregsetp->fp_r.fp_regs[regi]);
bcopy(from, to, REGISTER_RAW_SIZE (regi));
}
}
if ((regno == -1) || (regno == FCRCS_REGNUM))
fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(FCRCS_REGNUM)];
}
/* Figure out where the longjmp will land.
We expect the first arg to be a pointer to the jmp_buf structure from which
we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
This routine returns true on success. */
int
get_longjmp_target(pc)
CORE_ADDR *pc;
{
CORE_ADDR jb_addr;
jb_addr = read_register(A0_REGNUM);
if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, pc,
sizeof(CORE_ADDR)))
return 0;
SWAP_TARGET_AND_HOST(pc, sizeof(CORE_ADDR));
return 1;
}
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