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/* Native-dependent code for PowerPC's running NetBSD, for GDB.
Copyright 2002 Free Software Foundation, Inc.
Contributed by Wasabi Systems, 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 <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include "defs.h"
#include "inferior.h"
#include "gdb_assert.h"
#include "ppc-tdep.h"
#include "ppcnbsd-tdep.h"
/* Returns true if PT_GETREGS fetches this register. */
static int
getregs_supplies (int regno)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
return ((regno >= 0 && regno <= 31)
|| regno == tdep->ppc_lr_regnum
|| regno == tdep->ppc_cr_regnum
|| regno == tdep->ppc_xer_regnum
|| regno == tdep->ppc_ctr_regnum
|| regno == PC_REGNUM);
}
/* Like above, but for PT_GETFPREGS. */
static int
getfpregs_supplies (int regno)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
/* FIXME: jimb/2004-05-05: Some PPC variants don't have
floating-point registers. For such variants,
tdep->ppc_fp0_regnum and tdep->ppc_fpscr_regnum will be -1. I
don't think NetBSD runs on any of those chips, but we can at
least make sure that if someone tries it, they'll get a proper
notification. */
gdb_assert (ppc_floating_point_unit_p (current_gdbarch));
return ((regno >= tdep->ppc_fp0_regnum
&& regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
|| regno == tdep->ppc_fpscr_regnum);
}
void
fetch_inferior_registers (int regno)
{
if (regno == -1 || getregs_supplies (regno))
{
struct reg regs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't get registers");
ppcnbsd_supply_reg ((char *) ®s, regno);
if (regno != -1)
return;
}
if (regno == -1 || getfpregs_supplies (regno))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get FP registers");
ppcnbsd_supply_fpreg ((char *) &fpregs, regno);
if (regno != -1)
return;
}
}
void
store_inferior_registers (int regno)
{
if (regno == -1 || getregs_supplies (regno))
{
struct reg regs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't get registers");
ppcnbsd_fill_reg ((char *) ®s, regno);
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't write registers");
if (regno != -1)
return;
}
if (regno == -1 || getfpregs_supplies (regno))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get FP registers");
ppcnbsd_fill_fpreg ((char *) &fpregs, regno);
if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't set FP registers");
}
}
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