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 "qemu/osdep.h"
  21 #include "qemu-common.h"
  22 #include "cpu.h"
  23 #include "exec/gdbstub.h"
  24 #include "hw/lm32/lm32_pic.h"
  25
  26 int lm32_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  27 {
  28     LM32CPU *cpu = LM32_CPU(cs);
  29     CPULM32State *env = &cpu->env;
  30
  31     if (n < 32) {
  32         return gdb_get_reg32(mem_buf, env->regs[n]);
  33     } else {
  34         switch (n) {
  35         case 32:
  36             return gdb_get_reg32(mem_buf, env->pc);
  37         /* FIXME: put in right exception ID */
  38         case 33:
  39             return gdb_get_reg32(mem_buf, 0);
  40         case 34:
  41             return gdb_get_reg32(mem_buf, env->eba);
  42         case 35:
  43             return gdb_get_reg32(mem_buf, env->deba);
  44         case 36:
  45             return gdb_get_reg32(mem_buf, env->ie);
  46         case 37:
  47             return gdb_get_reg32(mem_buf, lm32_pic_get_im(env->pic_state));
  48         case 38:
  49             return gdb_get_reg32(mem_buf, lm32_pic_get_ip(env->pic_state));
  50         }
  51     }
  52     return 0;
  53 }
  54
  55 int lm32_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  56 {
  57     LM32CPU *cpu = LM32_CPU(cs);
  58     CPUClass *cc = CPU_GET_CLASS(cs);
  59     CPULM32State *env = &cpu->env;
  60     uint32_t tmp;
  61
  62     if (n > cc->gdb_num_core_regs) {
  63         return 0;
  64     }
  65
  66     tmp = ldl_p(mem_buf);
  67
  68     if (n < 32) {
  69         env->regs[n] = tmp;
  70     } else {
  71         switch (n) {
  72         case 32:
  73             env->pc = tmp;
  74             break;
  75         case 34:
  76             env->eba = tmp;
  77             break;
  78         case 35:
  79             env->deba = tmp;
  80             break;
  81         case 36:
  82             env->ie = tmp;
  83             break;
  84         case 37:
  85             lm32_pic_set_im(env->pic_state, tmp);
  86             break;
  87         case 38:
  88             lm32_pic_set_ip(env->pic_state, tmp);
  89             break;
  90         }
  91     }
  92     return 4;
  93 }