target-m68k/gdbstub.c

   1 /*
   2  * m68k gdb server stub
   3  *
   4  * Copyright (c) 2003-2005 Fabrice Bellard
   5  * Copyright (c) 2013 SUSE LINUX Products GmbH
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library 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 GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20 #include "qemu/osdep.h"
  21 #include "qemu-common.h"
  22 #include "cpu.h"
  23 #include "exec/gdbstub.h"
  24
  25 int m68k_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  26 {
  27     M68kCPU *cpu = M68K_CPU(cs);
  28     CPUM68KState *env = &cpu->env;
  29
  30     if (n < 8) {
  31         /* D0-D7 */
  32         return gdb_get_reg32(mem_buf, env->dregs[n]);
  33     } else if (n < 16) {
  34         /* A0-A7 */
  35         return gdb_get_reg32(mem_buf, env->aregs[n - 8]);
  36     } else {
  37         switch (n) {
  38         case 16:
  39             return gdb_get_reg32(mem_buf, env->sr);
  40         case 17:
  41             return gdb_get_reg32(mem_buf, env->pc);
  42         }
  43     }
  44     /* FP registers not included here because they vary between
  45        ColdFire and m68k.  Use XML bits for these.  */
  46     return 0;
  47 }
  48
  49 int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  50 {
  51     M68kCPU *cpu = M68K_CPU(cs);
  52     CPUM68KState *env = &cpu->env;
  53     uint32_t tmp;
  54
  55     tmp = ldl_p(mem_buf);
  56
  57     if (n < 8) {
  58         /* D0-D7 */
  59         env->dregs[n] = tmp;
  60     } else if (n < 16) {
  61         /* A0-A7 */
  62         env->aregs[n - 8] = tmp;
  63     } else {
  64         switch (n) {
  65         case 16:
  66             env->sr = tmp;
  67             break;
  68         case 17:
  69             env->pc = tmp;
  70             break;
  71         default:
  72             return 0;
  73         }
  74     }
  75     return 4;
  76 }