gdb/sun3-xdep.c

   1 /* Sun-3 Machine-dependent code which would otherwise be in inflow.c and core.c,
   2    for GDB, the GNU debugger.
   3    Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
   4
   5 This file is part of GDB.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #include <stdio.h>
  22 #include "defs.h"
  23 #include "param.h"
  24 #include "inferior.h"
  25
  26 #include <sys/ptrace.h>
  27 #define KERNEL          /* To get floating point reg definitions */
  28 #include <machine/reg.h>
  29
  30 #include "gdbcore.h"
  31
  32 extern int errno;
  33
  34 #if defined (GDB_TARGET_IS_SUN3)
  35 /* All of this stuff is only relevant if both host and target are sun3.  */
  36 void
  37 fetch_inferior_registers ()
  38 {
  39   struct regs inferior_registers;
  40 #ifdef FP0_REGNUM
  41   struct fp_status inferior_fp_registers;
  42 #endif
  43   extern char registers[];
  44
  45   registers_fetched ();
  46
  47   ptrace (PTRACE_GETREGS, inferior_pid, &inferior_registers);
  48 #ifdef FP0_REGNUM
  49   ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers);
  50 #endif
  51
  52   bcopy (&inferior_registers, registers, 16 * 4);
  53 #ifdef FP0_REGNUM
  54   bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  55          sizeof inferior_fp_registers.fps_regs);
  56 #endif
  57   *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
  58   *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
  59 #ifdef FP0_REGNUM
  60   bcopy (&inferior_fp_registers.fps_control,
  61          &registers[REGISTER_BYTE (FPC_REGNUM)],
  62          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  63 #endif
  64 }
  65
  66 /* Store our register values back into the inferior.
  67    If REGNO is -1, do this for all registers.
  68    Otherwise, REGNO specifies which register (so we can save time).  */
  69
  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, &inferior_registers);
  94 #if FP0_REGNUM
  95   ptrace (PTRACE_SETFPREGS, inferior_pid, &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.  */