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/* Native-dependent code for Motorola 68000 BSD's.
Copyright 2004 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 "gdb_assert.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include "m68k-tdep.h"
static int
m68kbsd_gregset_supplies_p (int regnum)
{
return (regnum >= M68K_D0_REGNUM && regnum <= M68K_PC_REGNUM);
}
static int
m68kbsd_fpregset_supplies_p (int regnum)
{
return (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FPI_REGNUM);
}
/* Supply the general-purpose registers stored in GREGS to REGCACHE. */
static void
m68kbsd_supply_gregset (struct regcache *regcache, const void *gregs)
{
const char *regs = gregs;
int regnum;
for (regnum = M68K_D0_REGNUM; regnum <= M68K_PC_REGNUM; regnum++)
regcache_raw_supply (regcache, regnum, regs + regnum * 4);
}
/* Supply the floating-point registers stored in FPREGS to REGCACHE. */
static void
m68kbsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
{
const char *regs = fpregs;
int regnum;
for (regnum = M68K_FP0_REGNUM; regnum <= M68K_FPI_REGNUM; regnum++)
regcache_raw_supply (regcache, regnum,
regs + m68kbsd_fpreg_offset (regnum));
}
/* Collect the general-purpose registers from REGCACHE and store them
in GREGS. */
static void
m68kbsd_collect_gregset (const struct regcache *regcache,
void *gregs, int regnum)
{
char *regs = gregs;
int i;
for (i = M68K_D0_REGNUM; i <= M68K_PC_REGNUM; i++)
{
if (regnum == -1 || regnum == i)
regcache_raw_collect (regcache, regnum, regs + i * 4);
}
}
/* Collect the floating-point registers from REGCACHE and store them
in FPREGS. */
static void
m68kbsd_collect_fpregset (struct regcache *regcache,
void *fpregs, int regnum)
{
char *regs = fpregs;
int i;
for (i = M68K_FP0_REGNUM; i <= M68K_FPI_REGNUM; i++)
{
if (regnum == -1 || regnum == i)
regcache_raw_collect (regcache, regnum,
regs + m68kbsd_fpreg_offset (i));
}
}
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers (including the floating-point registers). */
void
fetch_inferior_registers (int regnum)
{
if (regnum == -1 || m68kbsd_gregset_supplies_p (regnum))
{
struct reg regs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't get registers");
m68kbsd_supply_gregset (current_regcache, ®s);
}
if (regnum == -1 || m68kbsd_fpregset_supplies_p (regnum))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point status");
m68kbsd_supply_fpregset (current_regcache, &fpregs);
}
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers (including the floating-point registers). */
void
store_inferior_registers (int regnum)
{
if (regnum == -1 || m68kbsd_gregset_supplies_p (regnum))
{
struct reg regs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't get registers");
m68kbsd_collect_gregset (current_regcache, ®s, regnum);
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't write registers");
}
if (regnum == -1 || m68kbsd_fpregset_supplies_p (regnum))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point status");
m68kbsd_collect_fpregset (current_regcache, &fpregs, regnum);
if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't write floating point status");
}
}
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