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/* Native-dependent code for Alpha BSD's.
Copyright 2000, 2001 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 "inferior.h"
#include "regcache.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#ifdef HAVE_SYS_PROCFS_H
#include <sys/procfs.h>
#endif
#ifndef HAVE_GREGSET_T
typedef struct reg gregset_t;
#endif
#ifndef HAVE_FPREGSET_T
typedef struct fpreg fpregset_t;
#endif
#include "gregset.h"
/* Number of general-purpose registers. */
#define NUM_GREGS 32
/* Number of floating point registers. */
#define NUM_FPREGS 31
/* Transfering the registers between GDB, inferiors and core files. */
/* Fill GDB's register array with the general-purpose register values
in *GREGSETP. */
void
supply_gregset (gregset_t *gregsetp)
{
int i;
for (i = 0; i < NUM_GREGS; i++)
{
if (CANNOT_FETCH_REGISTER (i))
supply_register (i, NULL);
else
supply_register (i, (char *) &gregsetp->r_regs[i]);
}
/* The PC travels in the R_ZERO slot. */
supply_register (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]);
}
/* Fill register REGNO (if it is a general-purpose register) in
*GREGSETPS with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
fill_gregset (gregset_t *gregsetp, int regno)
{
int i;
for (i = 0; i < NUM_GREGS; i++)
if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
memcpy (&gregsetp->r_regs[i], ®isters[REGISTER_BYTE (i)],
REGISTER_RAW_SIZE (i));
/* The PC travels in the R_ZERO slot. */
if (regno == -1 || regno == PC_REGNUM)
memcpy (&gregsetp->r_regs[R_ZERO], ®isters[REGISTER_BYTE (PC_REGNUM)],
REGISTER_RAW_SIZE (PC_REGNUM));
}
/* Fill GDB's register array with the floating-point register values
in *FPREGSETP. */
void
supply_fpregset (fpregset_t *fpregsetp)
{
int i;
for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
{
if (CANNOT_FETCH_REGISTER (i))
supply_register (i, NULL);
else
supply_register (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]);
}
supply_register (FPCR_REGNUM, (char *) &fpregsetp->fpr_cr);
}
/* Fill register REGNO (if it is a floating-point register) in
*FPREGSETP with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
fill_fpregset (fpregset_t *fpregsetp, int regno)
{
int i;
for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
memcpy (&fpregsetp->fpr_regs[i - FP0_REGNUM],
®isters[REGISTER_BYTE (i)], REGISTER_RAW_SIZE (i));
if (regno == -1 || regno == FPCR_REGNUM)
memcpy (&fpregsetp->fpr_cr, ®isters[REGISTER_BYTE (FPCR_REGNUM)],
REGISTER_RAW_SIZE (FPCR_REGNUM));
}
/* Fetch register REGNO from the inferior. If REGNO is -1, do this
for all registers (including the floating point registers). */
void
fetch_inferior_registers (int regno)
{
gregset_t gregs;
if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't get registers");
supply_gregset (&gregs);
if (regno == -1 || regno >= FP0_REGNUM)
{
fpregset_t fpregs;
if (ptrace (PT_GETFPREGS, inferior_pid,
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point status");
supply_fpregset (&fpregs);
}
/* Reset virtual frame pointer. */
supply_register (FP_REGNUM, NULL);
}
/* Store register REGNO back into the inferior. If REGNO is -1, do
this for all registers (including the floating point registers). */
void
store_inferior_registers (int regno)
{
gregset_t gregs;
if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't get registers");
fill_gregset (&gregs, regno);
if (ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't write registers");
if (regno == -1 || regno >= FP0_REGNUM)
{
fpregset_t fpregs;
if (ptrace (PT_GETFPREGS, inferior_pid,
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point status");
fill_fpregset (&fpregs, regno);
if (ptrace (PT_SETFPREGS, inferior_pid,
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't write floating point status");
}
}
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