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 "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             /* SR is made of SR+CCR, CCR is many 1bit flags so uses helper */
  39             return gdb_get_reg32(mem_buf, env->sr | cpu_m68k_get_ccr(env));
  40         case 17:
  41             return gdb_get_reg32(mem_buf, env->pc);
  42         }
  43     }
  44     /*
  45      * FP registers not included here because they vary between
  46      * ColdFire and m68k.  Use XML bits for these.
  47      */
  48     return 0;
  49 }
  50
  51 int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  52 {
  53     M68kCPU *cpu = M68K_CPU(cs);
  54     CPUM68KState *env = &cpu->env;
  55     uint32_t tmp;
  56
  57     tmp = ldl_p(mem_buf);
  58
  59     if (n < 8) {
  60         /* D0-D7 */
  61         env->dregs[n] = tmp;
  62     } else if (n < 16) {
  63         /* A0-A7 */
  64         env->aregs[n - 8] = tmp;
  65     } else {
  66         switch (n) {
  67         case 16:
  68             cpu_m68k_set_sr(env, tmp);
  69             break;
  70         case 17:
  71             env->pc = tmp;
  72             break;
  73         default:
  74             return 0;
  75         }
  76     }
  77     return 4;
  78 }