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 GDB 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 1, or (at your option)
  10 any later version.
  11
  12 GDB 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 GDB; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 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 void
  35 fetch_inferior_registers ()
  36 {
  37   struct regs inferior_registers;
  38 #ifdef FP0_REGNUM
  39   struct fp_status inferior_fp_registers;
  40 #endif
  41   extern char registers[];
  42
  43   registers_fetched ();
  44
  45   ptrace (PTRACE_GETREGS, inferior_pid, &inferior_registers);
  46 #ifdef FP0_REGNUM
  47   ptrace (PTRACE_GETFPREGS, inferior_pid, &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, &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)
 101      char *core_reg_sect;
 102      unsigned core_reg_size;
 103      int which;
 104 {
 105   extern char registers[];
 106   struct regs *regs = (struct regs *) core_reg_sect;
 107
 108   if (which == 0) {
 109     if (core_reg_size < sizeof (struct regs))
 110       error ("Can't find registers in core file");
 111
 112     bcopy ((char *)regs, registers, 16 * 4);
 113     supply_register (PS_REGNUM, &regs->r_ps);
 114     supply_register (PC_REGNUM, &regs->r_pc);
 115
 116   } else if (which == 2) {
 117
 118 #define fpustruct  ((struct fpu *) core_reg_sect)
 119
 120     if (core_reg_size >= sizeof (struct fpu))
 121       {
 122         bcopy (fpustruct->f_fpstatus.fps_regs,
 123               &registers[REGISTER_BYTE (FP0_REGNUM)],
 124               sizeof fpustruct->f_fpstatus.fps_regs);
 125         bcopy (&fpustruct->f_fpstatus.fps_control,
 126               &registers[REGISTER_BYTE (FPC_REGNUM)],
 127               sizeof fpustruct->f_fpstatus -
 128                 sizeof fpustruct->f_fpstatus.fps_regs);
 129       }
 130     else
 131       fprintf (stderr, "Couldn't read float regs from core file\n");
 132   }
 133 }