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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));
  29
  30 void
  31 fetch_inferior_registers (regno)
  32      int regno;
  33 {
  34   struct regs inferior_registers;
  35 #ifdef FP0_REGNUM
  36   struct fp_status inferior_fp_registers;
  37 #endif
  38   extern char registers[];
  39
  40   registers_fetched ();
  41
  42   ptrace (PTRACE_GETREGS, inferior_pid,
  43           (PTRACE_ARG3_TYPE) &inferior_registers);
  44 #ifdef FP0_REGNUM
  45   ptrace (PTRACE_GETFPREGS, inferior_pid,
  46           (PTRACE_ARG3_TYPE) &inferior_fp_registers);
  47 #endif
  48
  49   memcpy (registers, &inferior_registers, 16 * 4);
  50 #ifdef FP0_REGNUM
  51   memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
  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   memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],
  58          &inferior_fp_registers.fps_control,
  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   memcpy (&inferior_registers, registers, 16 * 4);
  78 #ifdef FP0_REGNUM
  79   memcpy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  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   memcpy (&inferior_fp_registers.fps_control,
  87          &registers[REGISTER_BYTE (FPC_REGNUM)],
  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
 100 /* All of this stuff is only relevant if both host and target are sun3.  */
 101 /* Machine-dependent code for pulling registers out of a Sun-3 core file. */
 102
 103 static void
 104 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
 105      char *core_reg_sect;
 106      unsigned core_reg_size;
 107      int which;
 108      CORE_ADDR reg_addr;        /* Unused in this version */
 109 {
 110   extern char registers[];
 111   struct regs *regs = (struct regs *) core_reg_sect;
 112
 113   if (which == 0) {
 114     if (core_reg_size < sizeof (struct regs))
 115       error ("Can't find registers in core file");
 116
 117     memcpy (registers, (char *)regs, 16 * 4);
 118     supply_register (PS_REGNUM, (char *)&regs->r_ps);
 119     supply_register (PC_REGNUM, (char *)&regs->r_pc);
 120
 121   } else if (which == 2) {
 122
 123 #define fpustruct  ((struct fpu *) core_reg_sect)
 124
 125     if (core_reg_size >= sizeof (struct fpu))
 126       {
 127 #ifdef FP0_REGNUM
 128         memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 129               fpustruct->f_fpstatus.fps_regs,
 130               sizeof fpustruct->f_fpstatus.fps_regs);
 131         memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],
 132               &fpustruct->f_fpstatus.fps_control,
 133               sizeof fpustruct->f_fpstatus -
 134                 sizeof fpustruct->f_fpstatus.fps_regs);
 135 #endif
 136       }
 137     else
 138       fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n");
 139   }
 140 }
 141
 142 \f
 143 /* Register that we are able to handle sun3 core file formats.
 144    FIXME: is this really bfd_target_unknown_flavour? */
 145
 146 static struct core_fns sun3_core_fns =
 147 {
 148   bfd_target_unknown_flavour,
 149   fetch_core_registers,
 150   NULL
 151 };
 152
 153 void
 154 _initialize_core_sun3 ()
 155 {
 156   add_core_fns (&sun3_core_fns);
 157 }