gdb/a68v-xdep.c

   1 /* Host-dependent code for Apollo-68ksfor GDB, the GNU debugger.
   2    Copyright 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include "defs.h"
  21 #include "inferior.h"
  22 #include "gdbcore.h"
  23
  24 extern int errno;
  25
  26 #if defined (GDB_TARGET_IS_SUN3)
  27 /* All of this stuff is only relevant if both host and target are sun3.  */
  28 void
  29 fetch_inferior_registers ()
  30 {
  31   struct regs inferior_registers;
  32 #ifdef FP0_REGNUM
  33   struct fp_status inferior_fp_registers;
  34 #endif
  35   extern char registers[];
  36
  37   registers_fetched ();
  38
  39   ptrace (PTRACE_GETREGS, inferior_pid,
  40           (PTRACE_ARG3_TYPE) &inferior_registers, 0);
  41 #ifdef FP0_REGNUM
  42   ptrace (PTRACE_GETFPREGS, inferior_pid,
  43           (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
  44 #endif
  45
  46   bcopy (&inferior_registers, registers, 16 * 4);
  47 #ifdef FP0_REGNUM
  48   bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  49          sizeof inferior_fp_registers.fps_regs);
  50 #endif
  51   *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
  52   *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
  53 #ifdef FP0_REGNUM
  54   bcopy (&inferior_fp_registers.fps_control,
  55          &registers[REGISTER_BYTE (FPC_REGNUM)],
  56          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  57 #endif
  58 }
  59
  60 /* Store our register values back into the inferior.
  61    If REGNO is -1, do this for all registers.
  62    Otherwise, REGNO specifies which register (so we can save time).  */
  63
  64 store_inferior_registers (regno)
  65      int regno;
  66 {
  67   struct regs inferior_registers;
  68 #ifdef FP0_REGNUM
  69   struct fp_status inferior_fp_registers;
  70 #endif
  71   extern char registers[];
  72
  73   bcopy (registers, &inferior_registers, 16 * 4);
  74 #ifdef FP0_REGNUM
  75   bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
  76          sizeof inferior_fp_registers.fps_regs);
  77 #endif
  78   inferior_registers.r_ps = *(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
  79   inferior_registers.r_pc = *(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
  80
  81 #ifdef FP0_REGNUM
  82   bcopy (&registers[REGISTER_BYTE (FPC_REGNUM)],
  83          &inferior_fp_registers.fps_control,
  84          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  85 #endif
  86
  87   ptrace (PTRACE_SETREGS, inferior_pid,
  88           (PTRACE_ARG3_TYPE) &inferior_registers, 0);
  89 #if FP0_REGNUM
  90   ptrace (PTRACE_SETFPREGS, inferior_pid,
  91           (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
  92 #endif
  93 }
  94
  95 /* Machine-dependent code for pulling registers out of a Sun-3 core file. */
  96
  97 void
  98 fetch_core_registers (core_reg_sect, core_reg_size, which)
  99      char *core_reg_sect;
 100      unsigned core_reg_size;
 101      int which;
 102 {
 103   extern char registers[];
 104   struct regs *regs = (struct regs *) core_reg_sect;
 105
 106   if (which == 0) {
 107     if (core_reg_size < sizeof (struct regs))
 108       error ("Can't find registers in core file");
 109
 110     bcopy ((char *)regs, registers, 16 * 4);
 111     supply_register (PS_REGNUM, &regs->r_ps);
 112     supply_register (PC_REGNUM, &regs->r_pc);
 113
 114   } else if (which == 2) {
 115
 116 #define fpustruct  ((struct fpu *) core_reg_sect)
 117
 118     if (core_reg_size >= sizeof (struct fpu))
 119       {
 120 #ifdef FP0_REGNUM
 121         bcopy (fpustruct->f_fpstatus.fps_regs,
 122               &registers[REGISTER_BYTE (FP0_REGNUM)],
 123               sizeof fpustruct->f_fpstatus.fps_regs);
 124         bcopy (&fpustruct->f_fpstatus.fps_control,
 125               &registers[REGISTER_BYTE (FPC_REGNUM)],
 126               sizeof fpustruct->f_fpstatus -
 127                 sizeof fpustruct->f_fpstatus.fps_regs);
 128 #endif
 129       }
 130     else
 131       fprintf (stderr, "Couldn't read float regs from core file\n");
 132   }
 133 }
 134 #else /* Not sun3 target.  */
 135 /* These functions shouldn't be called when we're cross-debugging.  */
 136
 137 void
 138 fetch_inferior_registers ()
 139 {
 140 }
 141
 142 /* ARGSUSED */
 143 store_inferior_registers (regno)
 144      int regno;
 145 {
 146 }
 147
 148 /* ARGSUSED */
 149 void
 150 fetch_core_registers (core_reg_sect, core_reg_size, which)
 151      char *core_reg_sect;
 152      unsigned core_reg_size;
 153      int which;
 154 {
 155 }
 156 #endif /* Not sun3 target.  */