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, &inferior_registers);
  40 #ifdef FP0_REGNUM
  41   ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers);
  42 #endif
  43
  44   bcopy (&inferior_registers, registers, 16 * 4);
  45 #ifdef FP0_REGNUM
  46   bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  47          sizeof inferior_fp_registers.fps_regs);
  48 #endif
  49   *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
  50   *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
  51 #ifdef FP0_REGNUM
  52   bcopy (&inferior_fp_registers.fps_control,
  53          &registers[REGISTER_BYTE (FPC_REGNUM)],
  54          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  55 #endif
  56 }
  57
  58 /* Store our register values back into the inferior.
  59    If REGNO is -1, do this for all registers.
  60    Otherwise, REGNO specifies which register (so we can save time).  */
  61
  62 store_inferior_registers (regno)
  63      int regno;
  64 {
  65   struct regs inferior_registers;
  66 #ifdef FP0_REGNUM
  67   struct fp_status inferior_fp_registers;
  68 #endif
  69   extern char registers[];
  70
  71   bcopy (registers, &inferior_registers, 16 * 4);
  72 #ifdef FP0_REGNUM
  73   bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
  74          sizeof inferior_fp_registers.fps_regs);
  75 #endif
  76   inferior_registers.r_ps = *(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
  77   inferior_registers.r_pc = *(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
  78
  79 #ifdef FP0_REGNUM
  80   bcopy (&registers[REGISTER_BYTE (FPC_REGNUM)],
  81          &inferior_fp_registers.fps_control,
  82          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  83 #endif
  84
  85   ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers);
  86 #if FP0_REGNUM
  87   ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers);
  88 #endif
  89 }
  90
  91 /* Machine-dependent code for pulling registers out of a Sun-3 core file. */
  92
  93 void
  94 fetch_core_registers (core_reg_sect, core_reg_size, which)
  95      char *core_reg_sect;
  96      unsigned core_reg_size;
  97      int which;
  98 {
  99   extern char registers[];
 100   struct regs *regs = (struct regs *) core_reg_sect;
 101
 102   if (which == 0) {
 103     if (core_reg_size < sizeof (struct regs))
 104       error ("Can't find registers in core file");
 105
 106     bcopy ((char *)regs, registers, 16 * 4);
 107     supply_register (PS_REGNUM, &regs->r_ps);
 108     supply_register (PC_REGNUM, &regs->r_pc);
 109
 110   } else if (which == 2) {
 111
 112 #define fpustruct  ((struct fpu *) core_reg_sect)
 113
 114     if (core_reg_size >= sizeof (struct fpu))
 115       {
 116 #ifdef FP0_REGNUM
 117         bcopy (fpustruct->f_fpstatus.fps_regs,
 118               &registers[REGISTER_BYTE (FP0_REGNUM)],
 119               sizeof fpustruct->f_fpstatus.fps_regs);
 120         bcopy (&fpustruct->f_fpstatus.fps_control,
 121               &registers[REGISTER_BYTE (FPC_REGNUM)],
 122               sizeof fpustruct->f_fpstatus -
 123                 sizeof fpustruct->f_fpstatus.fps_regs);
 124 #endif
 125       }
 126     else
 127       fprintf (stderr, "Couldn't read float regs from core file\n");
 128   }
 129 }
 130 #else /* Not sun3 target.  */
 131 /* These functions shouldn't be called when we're cross-debugging.  */
 132
 133 void
 134 fetch_inferior_registers ()
 135 {
 136 }
 137
 138 /* ARGSUSED */
 139 store_inferior_registers (regno)
 140      int regno;
 141 {
 142 }
 143
 144 /* ARGSUSED */
 145 void
 146 fetch_core_registers (core_reg_sect, core_reg_size, which)
 147      char *core_reg_sect;
 148      unsigned core_reg_size;
 149      int which;
 150 {
 151 }
 152 #endif /* Not sun3 target.  */