gdb/i386nbsd-nat.c

   1 /* Native-dependent code for NetBSD/i386, for GDB.
   2    Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000
   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
  30 #define RF(dst, src) \
  31         memcpy(&registers[REGISTER_BYTE(dst)], &src, sizeof(src))
  32
  33 #define RS(src, dst) \
  34         memcpy(&dst, &registers[REGISTER_BYTE(src)], sizeof(dst))
  35
  36 struct env387
  37   {
  38     unsigned short control;
  39     unsigned short r0;
  40     unsigned short status;
  41     unsigned short r1;
  42     unsigned short tag;
  43     unsigned short r2;
  44     unsigned long eip;
  45     unsigned short code_seg;
  46     unsigned short opcode;
  47     unsigned long operand;
  48     unsigned short operand_seg;
  49     unsigned short r3;
  50     unsigned char regs[8][10];
  51   };
  52
  53 void
  54 fetch_inferior_registers (int regno)
  55 {
  56   struct reg inferior_registers;
  57   struct env387 inferior_fpregisters;
  58
  59   ptrace (PT_GETREGS, inferior_pid,
  60           (PTRACE_ARG3_TYPE) &inferior_registers, 0);
  61   ptrace (PT_GETFPREGS, inferior_pid,
  62           (PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
  63
  64   RF ( 0, inferior_registers.r_eax);
  65   RF ( 1, inferior_registers.r_ecx);
  66   RF ( 2, inferior_registers.r_edx);
  67   RF ( 3, inferior_registers.r_ebx);
  68   RF ( 4, inferior_registers.r_esp);
  69   RF ( 5, inferior_registers.r_ebp);
  70   RF ( 6, inferior_registers.r_esi);
  71   RF ( 7, inferior_registers.r_edi);
  72   RF ( 8, inferior_registers.r_eip);
  73   RF ( 9, inferior_registers.r_eflags);
  74   RF (10, inferior_registers.r_cs);
  75   RF (11, inferior_registers.r_ss);
  76   RF (12, inferior_registers.r_ds);
  77   RF (13, inferior_registers.r_es);
  78   RF (14, inferior_registers.r_fs);
  79   RF (15, inferior_registers.r_gs);
  80
  81   RF (FP0_REGNUM,     inferior_fpregisters.regs[0]);
  82   RF (FP0_REGNUM + 1, inferior_fpregisters.regs[1]);
  83   RF (FP0_REGNUM + 2, inferior_fpregisters.regs[2]);
  84   RF (FP0_REGNUM + 3, inferior_fpregisters.regs[3]);
  85   RF (FP0_REGNUM + 4, inferior_fpregisters.regs[4]);
  86   RF (FP0_REGNUM + 5, inferior_fpregisters.regs[5]);
  87   RF (FP0_REGNUM + 6, inferior_fpregisters.regs[6]);
  88   RF (FP0_REGNUM + 7, inferior_fpregisters.regs[7]);
  89
  90   RF (FCTRL_REGNUM,   inferior_fpregisters.control);
  91   RF (FSTAT_REGNUM,   inferior_fpregisters.status);
  92   RF (FTAG_REGNUM,    inferior_fpregisters.tag);
  93   RF (FCS_REGNUM,     inferior_fpregisters.code_seg);
  94   RF (FCOFF_REGNUM,   inferior_fpregisters.eip);
  95   RF (FDS_REGNUM,     inferior_fpregisters.operand_seg);
  96   RF (FDOFF_REGNUM,   inferior_fpregisters.operand);
  97   RF (FOP_REGNUM,     inferior_fpregisters.opcode);
  98
  99   registers_fetched ();
 100 }
 101
 102 void
 103 store_inferior_registers (int regno)
 104 {
 105   struct reg inferior_registers;
 106   struct env387 inferior_fpregisters;
 107
 108   RS ( 0, inferior_registers.r_eax);
 109   RS ( 1, inferior_registers.r_ecx);
 110   RS ( 2, inferior_registers.r_edx);
 111   RS ( 3, inferior_registers.r_ebx);
 112   RS ( 4, inferior_registers.r_esp);
 113   RS ( 5, inferior_registers.r_ebp);
 114   RS ( 6, inferior_registers.r_esi);
 115   RS ( 7, inferior_registers.r_edi);
 116   RS ( 8, inferior_registers.r_eip);
 117   RS ( 9, inferior_registers.r_eflags);
 118   RS (10, inferior_registers.r_cs);
 119   RS (11, inferior_registers.r_ss);
 120   RS (12, inferior_registers.r_ds);
 121   RS (13, inferior_registers.r_es);
 122   RS (14, inferior_registers.r_fs);
 123   RS (15, inferior_registers.r_gs);
 124
 125
 126   RS (FP0_REGNUM,     inferior_fpregisters.regs[0]);
 127   RS (FP0_REGNUM + 1, inferior_fpregisters.regs[1]);
 128   RS (FP0_REGNUM + 2, inferior_fpregisters.regs[2]);
 129   RS (FP0_REGNUM + 3, inferior_fpregisters.regs[3]);
 130   RS (FP0_REGNUM + 4, inferior_fpregisters.regs[4]);
 131   RS (FP0_REGNUM + 5, inferior_fpregisters.regs[5]);
 132   RS (FP0_REGNUM + 6, inferior_fpregisters.regs[6]);
 133   RS (FP0_REGNUM + 7, inferior_fpregisters.regs[7]);
 134
 135   RS (FCTRL_REGNUM,   inferior_fpregisters.control);
 136   RS (FSTAT_REGNUM,   inferior_fpregisters.status);
 137   RS (FTAG_REGNUM,    inferior_fpregisters.tag);
 138   RS (FCS_REGNUM,     inferior_fpregisters.code_seg);
 139   RS (FCOFF_REGNUM,   inferior_fpregisters.eip);
 140   RS (FDS_REGNUM,     inferior_fpregisters.operand_seg);
 141   RS (FDOFF_REGNUM,   inferior_fpregisters.operand);
 142   RS (FOP_REGNUM,     inferior_fpregisters.opcode);
 143
 144   ptrace (PT_SETREGS, inferior_pid,
 145           (PTRACE_ARG3_TYPE) &inferior_registers, 0);
 146   ptrace (PT_SETFPREGS, inferior_pid,
 147           (PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
 148 }
 149 \f
 150 int
 151 i386nbsd_use_struct_convention (int gcc_p, struct type *type)
 152 {
 153   return !(TYPE_LENGTH (type) == 1
 154            || TYPE_LENGTH (type) == 2
 155            || TYPE_LENGTH (type) == 4
 156            || TYPE_LENGTH (type) == 8);
 157 }
 158 \f
 159 struct md_core
 160 {
 161   struct reg intreg;
 162   struct env387 freg;
 163 };
 164
 165 static void
 166 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
 167                       CORE_ADDR ignore)
 168 {
 169   struct md_core *core_reg = (struct md_core *) core_reg_sect;
 170
 171   /* integer registers */
 172   memcpy (&registers[REGISTER_BYTE (0)], &core_reg->intreg,
 173           sizeof (struct reg));
 174
 175   /* floating point registers */
 176   RF (FP0_REGNUM,     core_reg->freg.regs[0]);
 177   RF (FP0_REGNUM + 1, core_reg->freg.regs[1]);
 178   RF (FP0_REGNUM + 2, core_reg->freg.regs[2]);
 179   RF (FP0_REGNUM + 3, core_reg->freg.regs[3]);
 180   RF (FP0_REGNUM + 4, core_reg->freg.regs[4]);
 181   RF (FP0_REGNUM + 5, core_reg->freg.regs[5]);
 182   RF (FP0_REGNUM + 6, core_reg->freg.regs[6]);
 183   RF (FP0_REGNUM + 7, core_reg->freg.regs[7]);
 184
 185   RF (FCTRL_REGNUM,   core_reg->freg.control);
 186   RF (FSTAT_REGNUM,   core_reg->freg.status);
 187   RF (FTAG_REGNUM,    core_reg->freg.tag);
 188   RF (FCS_REGNUM,     core_reg->freg.code_seg);
 189   RF (FCOFF_REGNUM,   core_reg->freg.eip);
 190   RF (FDS_REGNUM,     core_reg->freg.operand_seg);
 191   RF (FDOFF_REGNUM,   core_reg->freg.operand);
 192   RF (FOP_REGNUM,     core_reg->freg.opcode);
 193
 194   registers_fetched ();
 195 }
 196
 197 /* Register that we are able to handle i386nbsd core file formats.
 198    FIXME: is this really bfd_target_unknown_flavour? */
 199
 200 static struct core_fns i386nbsd_core_fns =
 201 {
 202   bfd_target_unknown_flavour,           /* core_flavour */
 203   default_check_format,                 /* check_format */
 204   default_core_sniffer,                 /* core_sniffer */
 205   fetch_core_registers,                 /* core_read_registers */
 206   NULL                                  /* next */
 207 };
 208
 209 void
 210 _initialize_i386nbsd_nat (void)
 211 {
 212   add_core_fns (&i386nbsd_core_fns);
 213 }