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 <stdio.h>
  21 #include "defs.h"
  22 #include "inferior.h"
  23 #include "gdbcore.h"
  24
  25 #include <sys/ptrace.h>
  26 #define KERNEL          /* To get floating point reg definitions */
  27 #include <machine/reg.h>
  28
  29 extern int errno;
  30
  31 #if defined (GDB_TARGET_IS_SUN3)
  32 /* All of this stuff is only relevant if both host and target are sun3.  */
  33 void
  34 fetch_inferior_registers ()
  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, &inferior_registers);
  45 #ifdef FP0_REGNUM
  46   ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers);
  47 #endif
  48
  49   bcopy (&inferior_registers, registers, 16 * 4);
  50 #ifdef FP0_REGNUM
  51   bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  52          sizeof inferior_fp_registers.fps_regs);
  53 #endif
  54   *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
  55   *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
  56 #ifdef FP0_REGNUM
  57   bcopy (&inferior_fp_registers.fps_control,
  58          &registers[REGISTER_BYTE (FPC_REGNUM)],
  59          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  60 #endif
  61 }
  62
  63 /* Store our register values back into the inferior.
  64    If REGNO is -1, do this for all registers.
  65    Otherwise, REGNO specifies which register (so we can save time).  */
  66
  67 store_inferior_registers (regno)
  68      int regno;
  69 {
  70   struct regs inferior_registers;
  71 #ifdef FP0_REGNUM
  72   struct fp_status inferior_fp_registers;
  73 #endif
  74   extern char registers[];
  75
  76   bcopy (registers, &inferior_registers, 16 * 4);
  77 #ifdef FP0_REGNUM
  78   bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
  79          sizeof inferior_fp_registers.fps_regs);
  80 #endif
  81   inferior_registers.r_ps = *(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
  82   inferior_registers.r_pc = *(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
  83
  84 #ifdef FP0_REGNUM
  85   bcopy (&registers[REGISTER_BYTE (FPC_REGNUM)],
  86          &inferior_fp_registers.fps_control,
  87          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  88 #endif
  89
  90   ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers);
  91 #if FP0_REGNUM
  92   ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers);
  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     bcopy ((char *)regs, registers, 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         bcopy (fpustruct->f_fpstatus.fps_regs,
 123               &registers[REGISTER_BYTE (FP0_REGNUM)],
 124               sizeof fpustruct->f_fpstatus.fps_regs);
 125         bcopy (&fpustruct->f_fpstatus.fps_control,
 126               &registers[REGISTER_BYTE (FPC_REGNUM)],
 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 store_inferior_registers (regno)
 145      int regno;
 146 {
 147 }
 148
 149 /* ARGSUSED */
 150 void
 151 fetch_core_registers (core_reg_sect, core_reg_size, which)
 152      char *core_reg_sect;
 153      unsigned core_reg_size;
 154      int which;
 155 {
 156 }
 157 #endif /* Not sun3 target.  */