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This commit is contained in:
Stan Shebs 1999-04-16 01:35:26 +00:00
parent cd946cff9e
commit c906108c21
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gdb/irix4-nat.c Normal file
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/* Native support for the SGI Iris running IRIX version 4, for GDB.
Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1995
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "inferior.h"
#include "gdbcore.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? */
static void
fetch_core_registers PARAMS ((char *, unsigned int, int, CORE_ADDR));
/*
* 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);
static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
/* 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 (CAUSE_REGNUM, (char *)&(gregsetp->gp_cause));
/* Fill inaccessible registers with zero. */
supply_register (BADVADDR_REGNUM, zerobuf);
}
void
fill_gregset (gregsetp, regno)
gregset_t *gregsetp;
int regno;
{
int regi;
register greg_t *regp = (greg_t *)(gregsetp->gp_regs);
/* same FIXME as above wrt 32*/
for (regi = 0; regi < 32; regi++)
if ((regno == -1) || (regno == regi))
*(regp + regi) = *(greg_t *) &registers[REGISTER_BYTE (regi)];
if ((regno == -1) || (regno == PC_REGNUM))
gregsetp->gp_pc = *(greg_t *) &registers[REGISTER_BYTE (PC_REGNUM)];
if ((regno == -1) || (regno == CAUSE_REGNUM))
gregsetp->gp_cause = *(greg_t *) &registers[REGISTER_BYTE (CAUSE_REGNUM)];
if ((regno == -1) || (regno == HI_REGNUM))
gregsetp->gp_mdhi = *(greg_t *) &registers[REGISTER_BYTE (HI_REGNUM)];
if ((regno == -1) || (regno == LO_REGNUM))
gregsetp->gp_mdlo = *(greg_t *) &registers[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;
static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
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. */
supply_register (FCRIR_REGNUM, zerobuf);
}
void
fill_fpregset (fpregsetp, regno)
fpregset_t *fpregsetp;
int regno;
{
int regi;
char *from, *to;
for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
{
if ((regno == -1) || (regno == regi))
{
from = (char *) &registers[REGISTER_BYTE (regi)];
to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
memcpy(to, from, REGISTER_RAW_SIZE (regi));
}
}
if ((regno == -1) || (regno == FCRCS_REGNUM))
fpregsetp->fp_csr = *(unsigned *) &registers[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;
{
char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
CORE_ADDR jb_addr;
jb_addr = read_register (A0_REGNUM);
if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
TARGET_PTR_BIT / TARGET_CHAR_BIT))
return 0;
*pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
return 1;
}
static void
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
char *core_reg_sect;
unsigned core_reg_size;
int which; /* Unused */
CORE_ADDR reg_addr; /* Unused */
{
if (core_reg_size != REGISTER_BYTES)
{
warning ("wrong size gregset struct in core file");
return;
}
memcpy ((char *)registers, core_reg_sect, core_reg_size);
}
/* Register that we are able to handle irix4 core file formats.
FIXME: is this really bfd_target_unknown_flavour? */
static struct core_fns irix4_core_fns =
{
bfd_target_unknown_flavour,
fetch_core_registers,
NULL
};
void
_initialize_core_irix4 ()
{
add_core_fns (&irix4_core_fns);
}