gdb/amd64bsd-nat.c

   1 /* Native-dependent code for AMD64 BSD's.
   2
   3    Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "inferior.h"
  22 #include "regcache.h"
  23 #include "target.h"
  24
  25 /* We include <signal.h> to make sure `struct fxsave64' is defined on
  26    NetBSD, since NetBSD's <machine/reg.h> needs it.  */
  27 #include "gdb_assert.h"
  28 #include <signal.h>
  29 #include <sys/types.h>
  30 #include <sys/ptrace.h>
  31 #include <machine/reg.h>
  32
  33 #include "amd64-tdep.h"
  34 #include "amd64-nat.h"
  35 #include "inf-ptrace.h"
  36 \f
  37
  38 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  39    for all registers (including the floating-point registers).  */
  40
  41 static void
  42 amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
  43 {
  44   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  45
  46   if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
  47     {
  48       struct reg regs;
  49
  50       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  51                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  52         perror_with_name (_("Couldn't get registers"));
  53
  54       amd64_supply_native_gregset (regcache, &regs, -1);
  55       if (regnum != -1)
  56         return;
  57     }
  58
  59   if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
  60     {
  61       struct fpreg fpregs;
  62
  63       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  64                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  65         perror_with_name (_("Couldn't get floating point status"));
  66
  67       amd64_supply_fxsave (regcache, -1, &fpregs);
  68     }
  69 }
  70
  71 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
  72    this for all registers (including the floating-point registers).  */
  73
  74 static void
  75 amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
  76 {
  77   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  78
  79   if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
  80     {
  81       struct reg regs;
  82
  83       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  84                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  85         perror_with_name (_("Couldn't get registers"));
  86
  87       amd64_collect_native_gregset (regcache, &regs, regnum);
  88
  89       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  90                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  91         perror_with_name (_("Couldn't write registers"));
  92
  93       if (regnum != -1)
  94         return;
  95     }
  96
  97   if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
  98     {
  99       struct fpreg fpregs;
 100
 101       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 102                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 103         perror_with_name (_("Couldn't get floating point status"));
 104
 105       amd64_collect_fxsave (regcache, regnum, &fpregs);
 106
 107       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 108                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 109         perror_with_name (_("Couldn't write floating point status"));
 110     }
 111 }
 112
 113 /* Create a prototype *BSD/amd64 target.  The client can override it
 114    with local methods.  */
 115
 116 struct target_ops *
 117 amd64bsd_target (void)
 118 {
 119   struct target_ops *t;
 120
 121   t = inf_ptrace_target ();
 122   t->to_fetch_registers = amd64bsd_fetch_inferior_registers;
 123   t->to_store_registers = amd64bsd_store_inferior_registers;
 124   return t;
 125 }