gdb/sun3-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 (regno)
  34      int regno;
  35 {
  36   struct regs inferior_registers;
  37 #ifdef FP0_REGNUM
  38   struct fp_status inferior_fp_registers;
  39 #endif
  40   extern char registers[];
  41
  42   registers_fetched ();
  43
  44   ptrace (PTRACE_GETREGS, inferior_pid,
  45           (PTRACE_ARG3_TYPE) &inferior_registers);
  46 #ifdef FP0_REGNUM
  47   ptrace (PTRACE_GETFPREGS, inferior_pid,
  48           (PTRACE_ARG3_TYPE) &inferior_fp_registers);
  49 #endif
  50
  51   bcopy (&inferior_registers, registers, 16 * 4);
  52 #ifdef FP0_REGNUM
  53   bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  54          sizeof inferior_fp_registers.fps_regs);
  55 #endif
  56   *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
  57   *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
  58 #ifdef FP0_REGNUM
  59   bcopy (&inferior_fp_registers.fps_control,
  60          &registers[REGISTER_BYTE (FPC_REGNUM)],
  61          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  62 #endif
  63 }
  64
  65 /* Store our register values back into the inferior.
  66    If REGNO is -1, do this for all registers.
  67    Otherwise, REGNO specifies which register (so we can save time).  */
  68
  69 void
  70 store_inferior_registers (regno)
  71      int regno;
  72 {
  73   struct regs inferior_registers;
  74 #ifdef FP0_REGNUM
  75   struct fp_status inferior_fp_registers;
  76 #endif
  77   extern char registers[];
  78
  79   bcopy (registers, &inferior_registers, 16 * 4);
  80 #ifdef FP0_REGNUM
  81   bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
  82          sizeof inferior_fp_registers.fps_regs);
  83 #endif
  84   inferior_registers.r_ps = *(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
  85   inferior_registers.r_pc = *(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
  86
  87 #ifdef FP0_REGNUM
  88   bcopy (&registers[REGISTER_BYTE (FPC_REGNUM)],
  89          &inferior_fp_registers.fps_control,
  90          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  91 #endif
  92
  93   ptrace (PTRACE_SETREGS, inferior_pid,
  94           (PTRACE_ARG3_TYPE) &inferior_registers);
  95 #if FP0_REGNUM
  96   ptrace (PTRACE_SETFPREGS, inferior_pid,
  97           (PTRACE_ARG3_TYPE) &inferior_fp_registers);
  98 #endif
  99 }
 100
 101 /* Machine-dependent code for pulling registers out of a Sun-3 core file. */
 102
 103 void
 104 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
 105      char *core_reg_sect;
 106      unsigned core_reg_size;
 107      int which;
 108      unsigned int reg_addr;     /* Unused in this version */
 109 {
 110   extern char registers[];
 111   struct regs *regs = (struct regs *) core_reg_sect;
 112
 113   if (which == 0) {
 114     if (core_reg_size < sizeof (struct regs))
 115       error ("Can't find registers in core file");
 116
 117     bcopy ((char *)regs, registers, 16 * 4);
 118     supply_register (PS_REGNUM, (char *)&regs->r_ps);
 119     supply_register (PC_REGNUM, (char *)&regs->r_pc);
 120
 121   } else if (which == 2) {
 122
 123 #define fpustruct  ((struct fpu *) core_reg_sect)
 124
 125     if (core_reg_size >= sizeof (struct fpu))
 126       {
 127 #ifdef FP0_REGNUM
 128         bcopy (fpustruct->f_fpstatus.fps_regs,
 129               &registers[REGISTER_BYTE (FP0_REGNUM)],
 130               sizeof fpustruct->f_fpstatus.fps_regs);
 131         bcopy (&fpustruct->f_fpstatus.fps_control,
 132               &registers[REGISTER_BYTE (FPC_REGNUM)],
 133               sizeof fpustruct->f_fpstatus -
 134                 sizeof fpustruct->f_fpstatus.fps_regs);
 135 #endif
 136       }
 137     else
 138       fprintf (stderr, "Couldn't read float regs from core file\n");
 139   }
 140 }
 141 #else /* Not sun3 target.  */
 142 /* These functions shouldn't be called when we're cross-debugging.  */
 143
 144 /* ARGSUSED */
 145 void
 146 fetch_inferior_registers (regno)
 147      int regno;
 148 {
 149 }
 150
 151 /* ARGSUSED */
 152 void
 153 store_inferior_registers (regno)
 154      int regno;
 155 {
 156 }
 157
 158 /* ARGSUSED */
 159 void
 160 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
 161      char *core_reg_sect;
 162      unsigned core_reg_size;
 163      int which;
 164      unsigned int reg_addr;     /* Unused in this version */
 165 {
 166 }
 167 #endif /* Not sun3 target.  */