target-lm32/gdbstub.c

   1 /*
   2  * LM32 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 "hw/lm32/lm32_pic.h"
  21
  22 static int cpu_gdb_read_register(CPULM32State *env, uint8_t *mem_buf, int n)
  23 {
  24     if (n < 32) {
  25         return gdb_get_reg32(mem_buf, env->regs[n]);
  26     } else {
  27         switch (n) {
  28         case 32:
  29             return gdb_get_reg32(mem_buf, env->pc);
  30         /* FIXME: put in right exception ID */
  31         case 33:
  32             return gdb_get_reg32(mem_buf, 0);
  33         case 34:
  34             return gdb_get_reg32(mem_buf, env->eba);
  35         case 35:
  36             return gdb_get_reg32(mem_buf, env->deba);
  37         case 36:
  38             return gdb_get_reg32(mem_buf, env->ie);
  39         case 37:
  40             return gdb_get_reg32(mem_buf, lm32_pic_get_im(env->pic_state));
  41         case 38:
  42             return gdb_get_reg32(mem_buf, lm32_pic_get_ip(env->pic_state));
  43         }
  44     }
  45     return 0;
  46 }
  47
  48 static int cpu_gdb_write_register(CPULM32State *env, uint8_t *mem_buf, int n)
  49 {
  50     LM32CPU *cpu = lm32_env_get_cpu(env);
  51     CPUClass *cc = CPU_GET_CLASS(cpu);
  52     uint32_t tmp;
  53
  54     if (n > cc->gdb_num_core_regs) {
  55         return 0;
  56     }
  57
  58     tmp = ldl_p(mem_buf);
  59
  60     if (n < 32) {
  61         env->regs[n] = tmp;
  62     } else {
  63         switch (n) {
  64         case 32:
  65             env->pc = tmp;
  66             break;
  67         case 34:
  68             env->eba = tmp;
  69             break;
  70         case 35:
  71             env->deba = tmp;
  72             break;
  73         case 36:
  74             env->ie = tmp;
  75             break;
  76         case 37:
  77             lm32_pic_set_im(env->pic_state, tmp);
  78             break;
  79         case 38:
  80             lm32_pic_set_ip(env->pic_state, tmp);
  81             break;
  82         }
  83     }
  84     return 4;
  85 }