gdb/i386nbsd-nat.c

   1 /* Native-dependent code for NetBSD/i386, for GDB.
   2    Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001
   3    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 2 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, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include <sys/types.h>
  24 #include <sys/ptrace.h>
  25 #include <machine/reg.h>
  26 #include <machine/frame.h>
  27 #include "inferior.h"
  28 #include "gdbcore.h" /* for registers_fetched() */
  29 #include "regcache.h"
  30
  31 #define RF(dst, src) \
  32         memcpy(&registers[REGISTER_BYTE(dst)], &src, sizeof(src))
  33
  34 #define RS(src, dst) \
  35         memcpy(&dst, &registers[REGISTER_BYTE(src)], sizeof(dst))
  36
  37 struct env387
  38   {
  39     unsigned short control;
  40     unsigned short r0;
  41     unsigned short status;
  42     unsigned short r1;
  43     unsigned short tag;
  44     unsigned short r2;
  45     unsigned long eip;
  46     unsigned short code_seg;
  47     unsigned short opcode;
  48     unsigned long operand;
  49     unsigned short operand_seg;
  50     unsigned short r3;
  51     unsigned char regs[8][10];
  52   };
  53
  54 void
  55 fetch_inferior_registers (int regno)
  56 {
  57   struct reg inferior_registers;
  58   struct env387 inferior_fpregisters;
  59
  60   ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  61           (PTRACE_ARG3_TYPE) &inferior_registers, 0);
  62   ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  63           (PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
  64
  65   RF ( 0, inferior_registers.r_eax);
  66   RF ( 1, inferior_registers.r_ecx);
  67   RF ( 2, inferior_registers.r_edx);
  68   RF ( 3, inferior_registers.r_ebx);
  69   RF ( 4, inferior_registers.r_esp);
  70   RF ( 5, inferior_registers.r_ebp);
  71   RF ( 6, inferior_registers.r_esi);
  72   RF ( 7, inferior_registers.r_edi);
  73   RF ( 8, inferior_registers.r_eip);
  74   RF ( 9, inferior_registers.r_eflags);
  75   RF (10, inferior_registers.r_cs);
  76   RF (11, inferior_registers.r_ss);
  77   RF (12, inferior_registers.r_ds);
  78   RF (13, inferior_registers.r_es);
  79   RF (14, inferior_registers.r_fs);
  80   RF (15, inferior_registers.r_gs);
  81
  82   RF (FP0_REGNUM,     inferior_fpregisters.regs[0]);
  83   RF (FP0_REGNUM + 1, inferior_fpregisters.regs[1]);
  84   RF (FP0_REGNUM + 2, inferior_fpregisters.regs[2]);
  85   RF (FP0_REGNUM + 3, inferior_fpregisters.regs[3]);
  86   RF (FP0_REGNUM + 4, inferior_fpregisters.regs[4]);
  87   RF (FP0_REGNUM + 5, inferior_fpregisters.regs[5]);
  88   RF (FP0_REGNUM + 6, inferior_fpregisters.regs[6]);
  89   RF (FP0_REGNUM + 7, inferior_fpregisters.regs[7]);
  90
  91   RF (FCTRL_REGNUM,   inferior_fpregisters.control);
  92   RF (FSTAT_REGNUM,   inferior_fpregisters.status);
  93   RF (FTAG_REGNUM,    inferior_fpregisters.tag);
  94   RF (FCS_REGNUM,     inferior_fpregisters.code_seg);
  95   RF (FCOFF_REGNUM,   inferior_fpregisters.eip);
  96   RF (FDS_REGNUM,     inferior_fpregisters.operand_seg);
  97   RF (FDOFF_REGNUM,   inferior_fpregisters.operand);
  98   RF (FOP_REGNUM,     inferior_fpregisters.opcode);
  99
 100   registers_fetched ();
 101 }
 102
 103 void
 104 store_inferior_registers (int regno)
 105 {
 106   struct reg inferior_registers;
 107   struct env387 inferior_fpregisters;
 108
 109   RS ( 0, inferior_registers.r_eax);
 110   RS ( 1, inferior_registers.r_ecx);
 111   RS ( 2, inferior_registers.r_edx);
 112   RS ( 3, inferior_registers.r_ebx);
 113   RS ( 4, inferior_registers.r_esp);
 114   RS ( 5, inferior_registers.r_ebp);
 115   RS ( 6, inferior_registers.r_esi);
 116   RS ( 7, inferior_registers.r_edi);
 117   RS ( 8, inferior_registers.r_eip);
 118   RS ( 9, inferior_registers.r_eflags);
 119   RS (10, inferior_registers.r_cs);
 120   RS (11, inferior_registers.r_ss);
 121   RS (12, inferior_registers.r_ds);
 122   RS (13, inferior_registers.r_es);
 123   RS (14, inferior_registers.r_fs);
 124   RS (15, inferior_registers.r_gs);
 125
 126
 127   RS (FP0_REGNUM,     inferior_fpregisters.regs[0]);
 128   RS (FP0_REGNUM + 1, inferior_fpregisters.regs[1]);
 129   RS (FP0_REGNUM + 2, inferior_fpregisters.regs[2]);
 130   RS (FP0_REGNUM + 3, inferior_fpregisters.regs[3]);
 131   RS (FP0_REGNUM + 4, inferior_fpregisters.regs[4]);
 132   RS (FP0_REGNUM + 5, inferior_fpregisters.regs[5]);
 133   RS (FP0_REGNUM + 6, inferior_fpregisters.regs[6]);
 134   RS (FP0_REGNUM + 7, inferior_fpregisters.regs[7]);
 135
 136   RS (FCTRL_REGNUM,   inferior_fpregisters.control);
 137   RS (FSTAT_REGNUM,   inferior_fpregisters.status);
 138   RS (FTAG_REGNUM,    inferior_fpregisters.tag);
 139   RS (FCS_REGNUM,     inferior_fpregisters.code_seg);
 140   RS (FCOFF_REGNUM,   inferior_fpregisters.eip);
 141   RS (FDS_REGNUM,     inferior_fpregisters.operand_seg);
 142   RS (FDOFF_REGNUM,   inferior_fpregisters.operand);
 143   RS (FOP_REGNUM,     inferior_fpregisters.opcode);
 144
 145   ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 146           (PTRACE_ARG3_TYPE) &inferior_registers, 0);
 147   ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 148           (PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
 149 }
 150 \f
 151 struct md_core
 152 {
 153   struct reg intreg;
 154   struct env387 freg;
 155 };
 156
 157 static void
 158 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
 159                       CORE_ADDR ignore)
 160 {
 161   struct md_core *core_reg = (struct md_core *) core_reg_sect;
 162
 163   /* integer registers */
 164   memcpy (&registers[REGISTER_BYTE (0)], &core_reg->intreg,
 165           sizeof (struct reg));
 166
 167   /* floating point registers */
 168   RF (FP0_REGNUM,     core_reg->freg.regs[0]);
 169   RF (FP0_REGNUM + 1, core_reg->freg.regs[1]);
 170   RF (FP0_REGNUM + 2, core_reg->freg.regs[2]);
 171   RF (FP0_REGNUM + 3, core_reg->freg.regs[3]);
 172   RF (FP0_REGNUM + 4, core_reg->freg.regs[4]);
 173   RF (FP0_REGNUM + 5, core_reg->freg.regs[5]);
 174   RF (FP0_REGNUM + 6, core_reg->freg.regs[6]);
 175   RF (FP0_REGNUM + 7, core_reg->freg.regs[7]);
 176
 177   RF (FCTRL_REGNUM,   core_reg->freg.control);
 178   RF (FSTAT_REGNUM,   core_reg->freg.status);
 179   RF (FTAG_REGNUM,    core_reg->freg.tag);
 180   RF (FCS_REGNUM,     core_reg->freg.code_seg);
 181   RF (FCOFF_REGNUM,   core_reg->freg.eip);
 182   RF (FDS_REGNUM,     core_reg->freg.operand_seg);
 183   RF (FDOFF_REGNUM,   core_reg->freg.operand);
 184   RF (FOP_REGNUM,     core_reg->freg.opcode);
 185
 186   registers_fetched ();
 187 }
 188
 189 /* Register that we are able to handle i386nbsd core file formats.
 190    FIXME: is this really bfd_target_unknown_flavour? */
 191
 192 static struct core_fns i386nbsd_core_fns =
 193 {
 194   bfd_target_unknown_flavour,           /* core_flavour */
 195   default_check_format,                 /* check_format */
 196   default_core_sniffer,                 /* core_sniffer */
 197   fetch_core_registers,                 /* core_read_registers */
 198   NULL                                  /* next */
 199 };
 200
 201 void
 202 _initialize_i386nbsd_nat (void)
 203 {
 204   add_core_fns (&i386nbsd_core_fns);
 205 }