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/* Native-dependent code for AMD64 BSD's.
Copyright (C) 2003-2016 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"
/* We include <signal.h> to make sure `struct fxsave64' is defined on
NetBSD, since NetBSD's <machine/reg.h> needs it. */
#include <signal.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include "amd64-tdep.h"
#include "amd64-nat.h"
#include "amd64bsd-nat.h"
#include "inf-ptrace.h"
#ifdef PT_GETXSTATE_INFO
size_t amd64bsd_xsave_len;
#endif
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers (including the floating-point registers). */
static void
amd64bsd_fetch_inferior_registers (struct target_ops *ops,
struct regcache *regcache, int regnum)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
{
struct reg regs;
if (ptrace (PT_GETREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
amd64_supply_native_gregset (regcache, ®s, -1);
if (regnum != -1)
return;
}
if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
{
struct fpreg fpregs;
#ifdef PT_GETXSTATE_INFO
void *xstateregs;
if (amd64bsd_xsave_len != 0)
{
xstateregs = alloca (amd64bsd_xsave_len);
if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
perror_with_name (_("Couldn't get extended state status"));
amd64_supply_xsave (regcache, -1, xstateregs);
return;
}
#endif
if (ptrace (PT_GETFPREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
amd64_supply_fxsave (regcache, -1, &fpregs);
}
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers (including the floating-point registers). */
static void
amd64bsd_store_inferior_registers (struct target_ops *ops,
struct regcache *regcache, int regnum)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
{
struct reg regs;
if (ptrace (PT_GETREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
amd64_collect_native_gregset (regcache, ®s, regnum);
if (ptrace (PT_SETREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
if (regnum != -1)
return;
}
if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
{
struct fpreg fpregs;
#ifdef PT_GETXSTATE_INFO
void *xstateregs;
if (amd64bsd_xsave_len != 0)
{
xstateregs = alloca (amd64bsd_xsave_len);
if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
perror_with_name (_("Couldn't get extended state status"));
amd64_collect_xsave (regcache, regnum, xstateregs, 0);
if (ptrace (PT_SETXSTATE, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) xstateregs, amd64bsd_xsave_len) == -1)
perror_with_name (_("Couldn't write extended state status"));
return;
}
#endif
if (ptrace (PT_GETFPREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
amd64_collect_fxsave (regcache, regnum, &fpregs);
if (ptrace (PT_SETFPREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't write floating point status"));
}
}
/* Create a prototype *BSD/amd64 target. The client can override it
with local methods. */
struct target_ops *
amd64bsd_target (void)
{
struct target_ops *t;
t = inf_ptrace_target ();
t->to_fetch_registers = amd64bsd_fetch_inferior_registers;
t->to_store_registers = amd64bsd_store_inferior_registers;
return t;
}
/* Support for debug registers. */
#ifdef HAVE_PT_GETDBREGS
static unsigned long
amd64bsd_dr_get (ptid_t ptid, int regnum)
{
struct dbreg dbregs;
if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
perror_with_name (_("Couldn't read debug registers"));
return DBREG_DRX ((&dbregs), regnum);
}
static void
amd64bsd_dr_set (int regnum, unsigned long value)
{
struct dbreg dbregs;
if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
perror_with_name (_("Couldn't get debug registers"));
/* For some mysterious reason, some of the reserved bits in the
debug control register get set. Mask these off, otherwise the
ptrace call below will fail. */
DBREG_DRX ((&dbregs), 7) &= ~(0xffffffff0000fc00);
DBREG_DRX ((&dbregs), regnum) = value;
if (ptrace (PT_SETDBREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
perror_with_name (_("Couldn't write debug registers"));
}
void
amd64bsd_dr_set_control (unsigned long control)
{
amd64bsd_dr_set (7, control);
}
void
amd64bsd_dr_set_addr (int regnum, CORE_ADDR addr)
{
gdb_assert (regnum >= 0 && regnum <= 4);
amd64bsd_dr_set (regnum, addr);
}
CORE_ADDR
amd64bsd_dr_get_addr (int regnum)
{
return amd64bsd_dr_get (inferior_ptid, regnum);
}
unsigned long
amd64bsd_dr_get_status (void)
{
return amd64bsd_dr_get (inferior_ptid, 6);
}
unsigned long
amd64bsd_dr_get_control (void)
{
return amd64bsd_dr_get (inferior_ptid, 7);
}
#endif /* PT_GETDBREGS */
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