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/* Native-dependent code for MIPS systems running NetBSD.
Copyright (C) 2000-2018 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
#include "regcache.h"
#include "target.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include "mips-tdep.h"
#include "mips-nbsd-tdep.h"
#include "inf-ptrace.h"
class mips_nbsd_nat_target final : public inf_ptrace_target
{
void fetch_registers (struct regcache *, int) override;
void store_registers (struct regcache *, int) override;
};
static mips_nbsd_nat_target the_mips_nbsd_nat_target;
/* Determine if PT_GETREGS fetches this register. */
static int
getregs_supplies (struct gdbarch *gdbarch, int regno)
{
return ((regno) >= MIPS_ZERO_REGNUM
&& (regno) <= gdbarch_pc_regnum (gdbarch));
}
void
mips_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regno)
{
pid_t pid = ptid_get_pid (regcache->ptid ());
struct gdbarch *gdbarch = regcache->arch ();
if (regno == -1 || getregs_supplies (gdbarch, regno))
{
struct reg regs;
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
mipsnbsd_supply_reg (regcache, (char *) ®s, regno);
if (regno != -1)
return;
}
if (regno == -1
|| regno >= gdbarch_fp0_regnum (regcache->arch ()))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
mipsnbsd_supply_fpreg (regcache, (char *) &fpregs, regno);
}
}
void
mips_nbsd_nat_target::store_registers (struct regcache *regcache, int regno)
{
pid_t pid = ptid_get_pid (regcache->ptid ());
struct gdbarch *gdbarch = regcache->arch ();
if (regno == -1 || getregs_supplies (gdbarch, regno))
{
struct reg regs;
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
mipsnbsd_fill_reg (regcache, (char *) ®s, regno);
if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
if (regno != -1)
return;
}
if (regno == -1
|| regno >= gdbarch_fp0_regnum (regcache->arch ()))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
mipsnbsd_fill_fpreg (regcache, (char *) &fpregs, regno);
if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't write floating point status"));
}
}
void
_initialize_mipsnbsd_nat (void)
{
add_inf_child_target (&the_mips_nbsd_nat_target);
}
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