text: /* Native-dependent code for AMD64 BSD's.
  
     Copyright (C) 2003-2015 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, ptid_get_pid (inferior_ptid),
  		  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  	perror_with_name (_("Couldn't get registers"));
  
        amd64_supply_native_gregset (regcache, &regs, -1);
        if (regnum != -1)
  	return;
      }
  
    if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
      {
        struct fpreg fpregs;
  #ifdef PT_GETXSTATE_INFO
        char *xstateregs;
  
        if (amd64bsd_xsave_len != 0)
  	{
  	  xstateregs = alloca (amd64bsd_xsave_len);
  	  if (ptrace (PT_GETXSTATE, ptid_get_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, ptid_get_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, ptid_get_pid (inferior_ptid),
                    (PTRACE_TYPE_ARG3) &regs, 0) == -1)
          perror_with_name (_("Couldn't get registers"));
  
        amd64_collect_native_gregset (regcache, &regs, regnum);
  
        if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
  	          (PTRACE_TYPE_ARG3) &regs, 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
        char *xstateregs;
  
        if (amd64bsd_xsave_len != 0)
  	{
  	  xstateregs = alloca (amd64bsd_xsave_len);
  	  if (ptrace (PT_GETXSTATE, ptid_get_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, ptid_get_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, ptid_get_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, ptid_get_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, ptid_get_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, ptid_get_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, ptid_get_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 */
  