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, &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 void
  68 store_inferior_registers (regno)
  69      int regno;
  70 {
  71   struct regs inferior_registers;
  72 #ifdef FP0_REGNUM
  73   struct fp_status inferior_fp_registers;
  74 #endif
  75   extern char registers[];
  76
  77   bcopy (registers, &inferior_registers, 16 * 4);
  78 #ifdef FP0_REGNUM
  79   bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
  80          sizeof inferior_fp_registers.fps_regs);
  81 #endif
  82   inferior_registers.r_ps = *(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
  83   inferior_registers.r_pc = *(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
  84
  85 #ifdef FP0_REGNUM
  86   bcopy (&registers[REGISTER_BYTE (FPC_REGNUM)],
  87          &inferior_fp_registers.fps_control,
  88          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  89 #endif
  90
  91   ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers);
  92 #if FP0_REGNUM
  93   ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers);
  94 #endif
  95 }
  96
  97 /* Machine-dependent code for pulling registers out of a Sun-3 core file. */
  98
  99 void
 100 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
 101      char *core_reg_sect;
 102      unsigned core_reg_size;
 103      int which;
 104      unsigned int reg_addr;     /* Unused in this version */
 105 {
 106   extern char registers[];
 107   struct regs *regs = (struct regs *) core_reg_sect;
 108
 109   if (which == 0) {
 110     if (core_reg_size < sizeof (struct regs))
 111       error ("Can't find registers in core file");
 112
 113     bcopy ((char *)regs, registers, 16 * 4);
 114     supply_register (PS_REGNUM, (char *)&regs->r_ps);
 115     supply_register (PC_REGNUM, (char *)&regs->r_pc);
 116
 117   } else if (which == 2) {
 118
 119 #define fpustruct  ((struct fpu *) core_reg_sect)
 120
 121     if (core_reg_size >= sizeof (struct fpu))
 122       {
 123 #ifdef FP0_REGNUM
 124         bcopy (fpustruct->f_fpstatus.fps_regs,
 125               &registers[REGISTER_BYTE (FP0_REGNUM)],
 126               sizeof fpustruct->f_fpstatus.fps_regs);
 127         bcopy (&fpustruct->f_fpstatus.fps_control,
 128               &registers[REGISTER_BYTE (FPC_REGNUM)],
 129               sizeof fpustruct->f_fpstatus -
 130                 sizeof fpustruct->f_fpstatus.fps_regs);
 131 #endif
 132       }
 133     else
 134       fprintf (stderr, "Couldn't read float regs from core file\n");
 135   }
 136 }
 137 #else /* Not sun3 target.  */
 138 /* These functions shouldn't be called when we're cross-debugging.  */
 139
 140 /* ARGSUSED */
 141 void
 142 fetch_inferior_registers (regno)
 143      int regno;
 144 {
 145 }
 146
 147 /* ARGSUSED */
 148 void
 149 store_inferior_registers (regno)
 150      int regno;
 151 {
 152 }
 153
 154 /* ARGSUSED */
 155 void
 156 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
 157      char *core_reg_sect;
 158      unsigned core_reg_size;
 159      int which;
 160      unsigned int reg_addr;     /* Unused in this version */
 161 {
 162 }
 163 #endif /* Not sun3 target.  */