gdb/os68k-xdep.c

   1 /* Host-dependent code for Sun-3 for 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 #include <sys/ptrace.h>
  25 #define KERNEL          /* To get floating point reg definitions */
  26 #include <machine/reg.h>
  27
  28 extern int errno;
  29
  30 #if defined (GDB_TARGET_IS_SUN3)
  31 /* All of this stuff is only relevant if both host and target are sun3.  */
  32 void
  33 fetch_inferior_registers ()
  34 {
  35   struct regs inferior_registers;
  36 #ifdef FP0_REGNUM
  37   struct fp_status inferior_fp_registers;
  38 #endif
  39   extern char registers[];
  40
  41   registers_fetched ();
  42
  43   ptrace (PTRACE_GETREGS, inferior_pid, &inferior_registers);
  44 #ifdef FP0_REGNUM
  45   ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers);
  46 #endif
  47
  48   bcopy (&inferior_registers, registers, 16 * 4);
  49 #ifdef FP0_REGNUM
  50   bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  51          sizeof inferior_fp_registers.fps_regs);
  52 #endif
  53   *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
  54   *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
  55 #ifdef FP0_REGNUM
  56   bcopy (&inferior_fp_registers.fps_control,
  57          &registers[REGISTER_BYTE (FPC_REGNUM)],
  58          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  59 #endif
  60 }
  61
  62 /* Store our register values back into the inferior.
  63    If REGNO is -1, do this for all registers.
  64    Otherwise, REGNO specifies which register (so we can save time).  */
  65
  66 store_inferior_registers (regno)
  67      int regno;
  68 {
  69   struct regs inferior_registers;
  70 #ifdef FP0_REGNUM
  71   struct fp_status inferior_fp_registers;
  72 #endif
  73   extern char registers[];
  74
  75   bcopy (registers, &inferior_registers, 16 * 4);
  76 #ifdef FP0_REGNUM
  77   bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
  78          sizeof inferior_fp_registers.fps_regs);
  79 #endif
  80   inferior_registers.r_ps = *(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
  81   inferior_registers.r_pc = *(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
  82
  83 #ifdef FP0_REGNUM
  84   bcopy (&registers[REGISTER_BYTE (FPC_REGNUM)],
  85          &inferior_fp_registers.fps_control,
  86          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  87 #endif
  88
  89   ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers);
  90 #if FP0_REGNUM
  91   ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers);
  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.  */