LXR qemu/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
  26int 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
  55int 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}
  94