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,
  44           (PTRACE_ARG3_TYPE) &inferior_registers);
  45 #ifdef FP0_REGNUM
  46   ptrace (PTRACE_GETFPREGS, inferior_pid,
  47           (PTRACE_ARG3_TYPE) &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 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,
  92           (PTRACE_ARG3_TYPE) &inferior_registers);
  93 #if FP0_REGNUM
  94   ptrace (PTRACE_SETFPREGS, inferior_pid,
  95           (PTRACE_ARG3_TYPE) &inferior_fp_registers);
  96 #endif
  97 }
  98
  99 /* Machine-dependent code for pulling registers out of a Sun-3 core file. */
 100
 101 void
 102 fetch_core_registers (core_reg_sect, core_reg_size, which)
 103      char *core_reg_sect;
 104      unsigned core_reg_size;
 105      int which;
 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 void
 142 fetch_inferior_registers ()
 143 {
 144 }
 145
 146 /* ARGSUSED */
 147 store_inferior_registers (regno)
 148      int regno;
 149 {
 150 }
 151
 152 /* ARGSUSED */
 153 void
 154 fetch_core_registers (core_reg_sect, core_reg_size, which)
 155      char *core_reg_sect;
 156      unsigned core_reg_size;
 157      int which;
 158 {
 159 }
 160 #endif /* Not sun3 target.  */