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/* Native-dependent code for OpenBSD/mips64.
Copyright (C) 2004-2020 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 "inf-ptrace.h"
#include "obsd-nat.h"
/* Shorthand for some register numbers used below. */
#define MIPS_PC_REGNUM MIPS_EMBED_PC_REGNUM
#define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM
#define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32
struct mips64_obsd_nat_target final : public obsd_nat_target
{
void fetch_registers (struct regcache *, int) override;
void store_registers (struct regcache *, int) override;
};
static mips64_obsd_nat_target the_mips64_obsd_nat_target;
/* Supply the general-purpose registers stored in GREGS to REGCACHE. */
static void
mips64obsd_supply_gregset (struct regcache *regcache, const void *gregs)
{
const char *regs = gregs;
int regnum;
for (regnum = MIPS_ZERO_REGNUM; regnum <= MIPS_PC_REGNUM; regnum++)
regcache->raw_supply (regnum, regs + regnum * 8);
for (regnum = MIPS_FP0_REGNUM; regnum <= MIPS_FSR_REGNUM; regnum++)
regcache->raw_supply (regnum, regs + (regnum + 2) * 8);
}
/* Collect the general-purpose registers from REGCACHE and store them
in GREGS. */
static void
mips64obsd_collect_gregset (const struct regcache *regcache,
void *gregs, int regnum)
{
char *regs = gregs;
int i;
for (i = MIPS_ZERO_REGNUM; i <= MIPS_PC_REGNUM; i++)
{
if (regnum == -1 || regnum == i)
regcache->raw_collect (i, regs + i * 8);
}
for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++)
{
if (regnum == -1 || regnum == i)
regcache->raw_collect (i, regs + (i + 2) * 8);
}
}
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers. */
void
mips64_obsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
{
struct reg regs;
pid_t pid = regcache->ptid ().pid ();
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
mips64obsd_supply_gregset (regcache, ®s);
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers. */
static void
mips64_obsd_nat_target::store_registers (struct regcache *regcache, int regnum)
{
struct reg regs;
pid_t pid = regcache->ptid ().pid ();
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
mips64obsd_collect_gregset (regcache, ®s, regnum);
if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
}
void _initialize_mips64obsd_nat ();
void
_initialize_mips64obsd_nat ()
{
add_inf_child_target (&the_mips64_obsd_nat_target);
}
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