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/* Native-dependent code for FreeBSD/aarch64.
Copyright (C) 2017 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 "target.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include "fbsd-nat.h"
#include "aarch64-tdep.h"
#include "aarch64-fbsd-tdep.h"
#include "inf-ptrace.h"
/* Determine if PT_GETREGS fetches REGNUM. */
static bool
getregs_supplies (struct gdbarch *gdbarch, int regnum)
{
return (regnum >= AARCH64_X0_REGNUM && regnum <= AARCH64_CPSR_REGNUM);
}
/* Determine if PT_GETFPREGS fetches REGNUM. */
static bool
getfpregs_supplies (struct gdbarch *gdbarch, int regnum)
{
return (regnum >= AARCH64_V0_REGNUM && regnum <= AARCH64_FPCR_REGNUM);
}
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers. */
static void
aarch64_fbsd_fetch_inferior_registers (struct target_ops *ops,
struct regcache *regcache, int regnum)
{
pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache));
struct gdbarch *gdbarch = get_regcache_arch (regcache);
if (regnum == -1 || getregs_supplies (gdbarch, regnum))
{
struct reg regs;
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
regcache->supply_regset (&aarch64_fbsd_gregset, regnum, ®s,
sizeof (regs));
}
if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
regcache->supply_regset (&aarch64_fbsd_fpregset, regnum, &fpregs,
sizeof (fpregs));
}
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers. */
static void
aarch64_fbsd_store_inferior_registers (struct target_ops *ops,
struct regcache *regcache, int regnum)
{
pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache));
struct gdbarch *gdbarch = get_regcache_arch (regcache);
if (regnum == -1 || getregs_supplies (gdbarch, regnum))
{
struct reg regs;
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
regcache->collect_regset (&aarch64_fbsd_gregset, regnum, ®s,
sizeof (regs));
if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
}
if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
regcache->collect_regset (&aarch64_fbsd_fpregset, regnum, &fpregs,
sizeof (fpregs));
if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't write floating point status"));
}
}
void
_initialize_aarch64_fbsd_nat (void)
{
struct target_ops *t;
t = inf_ptrace_target ();
t->to_fetch_registers = aarch64_fbsd_fetch_inferior_registers;
t->to_store_registers = aarch64_fbsd_store_inferior_registers;
fbsd_nat_add_target (t);
}
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