gdb/sun3-nat.c

   1 /* Host-dependent code for Sun-3 for GDB, the GNU debugger.
   2    Copyright 1986, 1987, 1989, 1991, 1992 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 void
  29 fetch_inferior_registers (regno)
  30      int regno;
  31 {
  32   struct regs inferior_registers;
  33 #ifdef FP0_REGNUM
  34   struct fp_status inferior_fp_registers;
  35 #endif
  36   extern char registers[];
  37
  38   registers_fetched ();
  39
  40   ptrace (PTRACE_GETREGS, inferior_pid,
  41           (PTRACE_ARG3_TYPE) &inferior_registers);
  42 #ifdef FP0_REGNUM
  43   ptrace (PTRACE_GETFPREGS, inferior_pid,
  44           (PTRACE_ARG3_TYPE) &inferior_fp_registers);
  45 #endif
  46
  47   memcpy (registers, &inferior_registers, 16 * 4);
  48 #ifdef FP0_REGNUM
  49   memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
  50          sizeof inferior_fp_registers.fps_regs);
  51 #endif
  52   *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
  53   *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
  54 #ifdef FP0_REGNUM
  55   memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],
  56          &inferior_fp_registers.fps_control,
  57          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  58 #endif
  59 }
  60
  61 /* Store our register values back into the inferior.
  62    If REGNO is -1, do this for all registers.
  63    Otherwise, REGNO specifies which register (so we can save time).  */
  64
  65 void
  66 store_inferior_registers (regno)
  67      int regno;
  68 {
  69   struct regs inferior_registers;
  70 #ifdef FP0_REGNUM
  71   struct fp_status inferior_fp_registers;
  72 #endif
  73   extern char registers[];
  74
  75   memcpy (&inferior_registers, registers, 16 * 4);
  76 #ifdef FP0_REGNUM
  77   memcpy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  78          sizeof inferior_fp_registers.fps_regs);
  79 #endif
  80   inferior_registers.r_ps = *(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
  81   inferior_registers.r_pc = *(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
  82
  83 #ifdef FP0_REGNUM
  84   memcpy (&inferior_fp_registers.fps_control,
  85          &registers[REGISTER_BYTE (FPC_REGNUM)],
  86          sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
  87 #endif
  88
  89   ptrace (PTRACE_SETREGS, inferior_pid,
  90           (PTRACE_ARG3_TYPE) &inferior_registers);
  91 #if FP0_REGNUM
  92   ptrace (PTRACE_SETFPREGS, inferior_pid,
  93           (PTRACE_ARG3_TYPE) &inferior_fp_registers);
  94 #endif
  95 }
  96
  97
  98 /* All of this stuff is only relevant if both host and target are sun3.  */
  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, reg_addr)
 103      char *core_reg_sect;
 104      unsigned core_reg_size;
 105      int which;
 106      unsigned int reg_addr;     /* Unused in this version */
 107 {
 108   extern char registers[];
 109   struct regs *regs = (struct regs *) core_reg_sect;
 110
 111   if (which == 0) {
 112     if (core_reg_size < sizeof (struct regs))
 113       error ("Can't find registers in core file");
 114
 115     memcpy (registers, (char *)regs, 16 * 4);
 116     supply_register (PS_REGNUM, (char *)&regs->r_ps);
 117     supply_register (PC_REGNUM, (char *)&regs->r_pc);
 118
 119   } else if (which == 2) {
 120
 121 #define fpustruct  ((struct fpu *) core_reg_sect)
 122
 123     if (core_reg_size >= sizeof (struct fpu))
 124       {
 125 #ifdef FP0_REGNUM
 126         memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 127               fpustruct->f_fpstatus.fps_regs,
 128               sizeof fpustruct->f_fpstatus.fps_regs);
 129         memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],
 130               &fpustruct->f_fpstatus.fps_control,
 131               sizeof fpustruct->f_fpstatus -
 132                 sizeof fpustruct->f_fpstatus.fps_regs);
 133 #endif
 134       }
 135     else
 136       fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n");
 137   }
 138 }