target-openrisc/gdbstub.c

   1 /*
   2  * OpenRISC 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
  21 static int cpu_gdb_read_register(CPUOpenRISCState *env, uint8_t *mem_buf, int n)
  22 {
  23     if (n < 32) {
  24         return gdb_get_reg32(mem_buf, env->gpr[n]);
  25     } else {
  26         switch (n) {
  27         case 32:    /* PPC */
  28             return gdb_get_reg32(mem_buf, env->ppc);
  29
  30         case 33:    /* NPC */
  31             return gdb_get_reg32(mem_buf, env->npc);
  32
  33         case 34:    /* SR */
  34             return gdb_get_reg32(mem_buf, env->sr);
  35
  36         default:
  37             break;
  38         }
  39     }
  40     return 0;
  41 }
  42
  43 static int cpu_gdb_write_register(CPUOpenRISCState *env,
  44                                   uint8_t *mem_buf, int n)
  45 {
  46     OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
  47     CPUClass *cc = CPU_GET_CLASS(cpu);
  48     uint32_t tmp;
  49
  50     if (n > cc->gdb_num_core_regs) {
  51         return 0;
  52     }
  53
  54     tmp = ldl_p(mem_buf);
  55
  56     if (n < 32) {
  57         env->gpr[n] = tmp;
  58     } else {
  59         switch (n) {
  60         case 32: /* PPC */
  61             env->ppc = tmp;
  62             break;
  63
  64         case 33: /* NPC */
  65             env->npc = tmp;
  66             break;
  67
  68         case 34: /* SR */
  69             env->sr = tmp;
  70             break;
  71
  72         default:
  73             break;
  74         }
  75     }
  76     return 4;
  77 }