gdb/a68v-nat.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   memcpy (registers, &inferior_registers, 16 * 4);
  47 #ifdef FP0_REGNUM
  48   memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
  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   memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],
  55          &inferior_fp_registers.fps_control,
  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 void
  65 store_inferior_registers (regno)
  66      int regno;
  67 {
  68   struct regs inferior_registers;
  69 #ifdef FP0_REGNUM
  70   struct fp_status inferior_fp_registers;
  71 #endif
  72   extern char registers[];
  73
  74   memcpy (&inferior_registers, registers, 16 * 4);
  75 #ifdef FP0_REGNUM
  76   memcpy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  77          sizeof inferior_fp_registers.fps_regs);
  78 #endif
  79   inferior_registers.r_ps = *(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
  80   inferior_registers.r_pc = *(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
  81
  82 #ifdef FP0_REGNUM
  83   memcpy (&inferior_fp_registers.fps_control,
  84          &registers[REGISTER_BYTE (FPC_REGNUM)],
  85          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  86 #endif
  87
  88   ptrace (PTRACE_SETREGS, inferior_pid,
  89           (PTRACE_ARG3_TYPE) &inferior_registers, 0);
  90 #if FP0_REGNUM
  91   ptrace (PTRACE_SETFPREGS, inferior_pid,
  92           (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
  93 #endif
  94 }
  95
  96 /* Machine-dependent code for pulling registers out of a Sun-3 core file. */
  97
  98 void
  99 fetch_core_registers (core_reg_sect, core_reg_size, which)
 100      char *core_reg_sect;
 101      unsigned core_reg_size;
 102      int which;
 103 {
 104   extern char registers[];
 105   struct regs *regs = (struct regs *) core_reg_sect;
 106
 107   if (which == 0) {
 108     if (core_reg_size < sizeof (struct regs))
 109       error ("Can't find registers in core file");
 110
 111     memcpy (registers, (char *)regs, 16 * 4);
 112     supply_register (PS_REGNUM, &regs->r_ps);
 113     supply_register (PC_REGNUM, &regs->r_pc);
 114
 115   } else if (which == 2) {
 116
 117 #define fpustruct  ((struct fpu *) core_reg_sect)
 118
 119     if (core_reg_size >= sizeof (struct fpu))
 120       {
 121 #ifdef FP0_REGNUM
 122         memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 123               fpustruct->f_fpstatus.fps_regs,
 124               sizeof fpustruct->f_fpstatus.fps_regs);
 125         memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],
 126               &fpustruct->f_fpstatus.fps_control,
 127               sizeof fpustruct->f_fpstatus -
 128                 sizeof fpustruct->f_fpstatus.fps_regs);
 129 #endif
 130       }
 131     else
 132       fprintf (stderr, "Couldn't read float regs from core file\n");
 133   }
 134 }
 135 #else /* Not sun3 target.  */
 136 /* These functions shouldn't be called when we're cross-debugging.  */
 137
 138 void
 139 fetch_inferior_registers ()
 140 {
 141 }
 142
 143 /* ARGSUSED */
 144 void
 145 store_inferior_registers (regno)
 146      int regno;
 147 {
 148 }
 149
 150 /* ARGSUSED */
 151 void
 152 fetch_core_registers (core_reg_sect, core_reg_size, which)
 153      char *core_reg_sect;
 154      unsigned core_reg_size;
 155      int which;
 156 {
 157 }
 158 #endif /* Not sun3 target.  */