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 "exec/gdbstub.h"
  23
  24 int m68k_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  25 {
  26     M68kCPU *cpu = M68K_CPU(cs);
  27     CPUM68KState *env = &cpu->env;
  28
  29     if (n < 8) {
  30         /* D0-D7 */
  31         return gdb_get_reg32(mem_buf, env->dregs[n]);
  32     } else if (n < 16) {
  33         /* A0-A7 */
  34         return gdb_get_reg32(mem_buf, env->aregs[n - 8]);
  35     } else {
  36         switch (n) {
  37         case 16:
  38             return gdb_get_reg32(mem_buf, env->sr);
  39         case 17:
  40             return gdb_get_reg32(mem_buf, env->pc);
  41         }
  42     }
  43     /* FP registers not included here because they vary between
  44        ColdFire and m68k.  Use XML bits for these.  */
  45     return 0;
  46 }
  47
  48 int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  49 {
  50     M68kCPU *cpu = M68K_CPU(cs);
  51     CPUM68KState *env = &cpu->env;
  52     uint32_t tmp;
  53
  54     tmp = ldl_p(mem_buf);
  55
  56     if (n < 8) {
  57         /* D0-D7 */
  58         env->dregs[n] = tmp;
  59     } else if (n < 16) {
  60         /* A0-A7 */
  61         env->aregs[n - 8] = tmp;
  62     } else {
  63         switch (n) {
  64         case 16:
  65             env->sr = tmp;
  66             break;
  67         case 17:
  68             env->pc = tmp;
  69             break;
  70         default:
  71             return 0;
  72         }
  73     }
  74     return 4;
  75 }