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 2.1 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 "cpu.h"
  22 #include "gdbstub/helpers.h"
  23
  24 int m68k_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
  25 {
  26     CPUM68KState *env = cpu_env(cs);
  27
  28     if (n < 8) {
  29         /* D0-D7 */
  30         return gdb_get_reg32(mem_buf, env->dregs[n]);
  31     } else if (n < 16) {
  32         /* A0-A7 */
  33         return gdb_get_reg32(mem_buf, env->aregs[n - 8]);
  34     } else {
  35         switch (n) {
  36         case 16:
  37             /* SR is made of SR+CCR, CCR is many 1bit flags so uses helper */
  38             return gdb_get_reg32(mem_buf, env->sr | cpu_m68k_get_ccr(env));
  39         case 17:
  40             return gdb_get_reg32(mem_buf, env->pc);
  41         }
  42     }
  43     /*
  44      * FP registers not included here because they vary between
  45      * ColdFire and m68k.  Use XML bits for these.
  46      */
  47     return 0;
  48 }
  49
  50 int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  51 {
  52     CPUM68KState *env = cpu_env(cs);
  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             cpu_m68k_set_sr(env, tmp);
  67             break;
  68         case 17:
  69             env->pc = tmp;
  70             break;
  71         default:
  72             return 0;
  73         }
  74     }
  75     return 4;
  76 }