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