gdb/a68v-nat.c

   1 /* Host-dependent code for Apollo-68ks for GDB, the GNU debugger.
   2    Copyright 1986, 1987, 1989, 1991, 2001 Free Software Foundation,
   3    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., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "inferior.h"
  24 #include "regcache.h"
  25
  26 #ifndef _ISP__M68K
  27 #define _ISP__M68K 1
  28 #endif
  29
  30 #include <ptrace.h>
  31
  32 extern int errno;
  33
  34 void
  35 fetch_inferior_registers (int ignored)
  36 {
  37   struct ptrace_$data_regs_m68k inferior_registers;
  38   struct ptrace_$floating_regs_m68k inferior_fp_registers;
  39   struct ptrace_$control_regs_m68k inferior_control_registers;
  40
  41   ptrace_$init_control (&inferior_control_registers);
  42   inferior_fp_registers.size = sizeof (inferior_fp_registers);
  43
  44   registers_fetched ();
  45
  46   ptrace (PTRACE_GETREGS, inferior_pid,
  47           (PTRACE_ARG3_TYPE) & inferior_registers,
  48           ptrace_$data_set,
  49           (PTRACE_ARG3_TYPE) & inferior_registers,
  50           ptrace_$data_set);
  51
  52   ptrace (PTRACE_GETREGS, inferior_pid,
  53           (PTRACE_ARG3_TYPE) & inferior_fp_registers,
  54           ptrace_$floating_set_m68k,
  55           (PTRACE_ARG3_TYPE) & inferior_fp_registers,
  56           ptrace_$floating_set_m68k);
  57
  58   ptrace (PTRACE_GETREGS, inferior_pid,
  59           (PTRACE_ARG3_TYPE) & inferior_control_registers,
  60           ptrace_$control_set_m68k,
  61           (PTRACE_ARG3_TYPE) & inferior_control_registers,
  62           ptrace_$control_set_m68k);
  63
  64   bcopy (&inferior_registers, registers, 16 * 4);
  65   bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
  66          sizeof inferior_fp_registers.regs);
  67   *(int *) &registers[REGISTER_BYTE (PS_REGNUM)] = inferior_control_registers.sr;
  68   *(int *) &registers[REGISTER_BYTE (PC_REGNUM)] = inferior_control_registers.pc;
  69 }
  70
  71 /* Store our register values back into the inferior.
  72    If REGNO is -1, do this for all registers.
  73    Otherwise, REGNO specifies which register (so we can save time).  */
  74
  75 void
  76 store_inferior_registers (int regno)
  77 {
  78   struct ptrace_$data_regs_m68k inferior_registers;
  79   struct ptrace_$floating_regs_m68k inferior_fp_registers;
  80   struct ptrace_$control_regs_m68k inferior_control_registers;
  81
  82   ptrace_$init_control (&inferior_control_registers);
  83   inferior_fp_registers.size = sizeof (inferior_fp_registers);
  84
  85   ptrace (PTRACE_GETREGS, inferior_pid,
  86           (PTRACE_ARG3_TYPE) & inferior_fp_registers,
  87           ptrace_$floating_set_m68k,
  88           (PTRACE_ARG3_TYPE) & inferior_fp_registers,
  89           ptrace_$floating_set_m68k);
  90
  91   ptrace (PTRACE_GETREGS, inferior_pid,
  92           (PTRACE_ARG3_TYPE) & inferior_control_registers,
  93           ptrace_$control_set_m68k,
  94           (PTRACE_ARG3_TYPE) & inferior_control_registers,
  95           ptrace_$control_set_m68k);
  96
  97   bcopy (registers, &inferior_registers, sizeof (inferior_registers));
  98
  99   bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)], inferior_fp_registers.regs,
 100          sizeof inferior_fp_registers.regs);
 101
 102   inferior_control_registers.sr = *(int *) &registers[REGISTER_BYTE (PS_REGNUM)];
 103   inferior_control_registers.pc = *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
 104
 105   ptrace (PTRACE_SETREGS, inferior_pid,
 106           (PTRACE_ARG3_TYPE) & inferior_registers,
 107           ptrace_$data_set_m68k,
 108           (PTRACE_ARG3_TYPE) & inferior_registers,
 109           ptrace_$data_set_m68k);
 110
 111   ptrace (PTRACE_SETREGS, inferior_pid,
 112           (PTRACE_ARG3_TYPE) & inferior_fp_registers,
 113           ptrace_$floating_set_m68k,
 114           (PTRACE_ARG3_TYPE) & inferior_fp_registers,
 115           ptrace_$floating_set_m68k);
 116
 117   ptrace (PTRACE_SETREGS, inferior_pid,
 118           (PTRACE_ARG3_TYPE) & inferior_control_registers,
 119           ptrace_$control_set_m68k,
 120           (PTRACE_ARG3_TYPE) & inferior_control_registers,
 121           ptrace_$control_set_m68k);
 122 }