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