LXR qemu/target-m68k/gdbstub.c

   1/*
   2 * m68k 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
  24int m68k_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  25{
  26    M68kCPU *cpu = M68K_CPU(cs);
  27    CPUM68KState *env = &cpu->env;
  28
  29    if (n < 8) {
  30        /* D0-D7 */
  31        return gdb_get_reg32(mem_buf, env->dregs[n]);
  32    } else if (n < 16) {
  33        /* A0-A7 */
  34        return gdb_get_reg32(mem_buf, env->aregs[n - 8]);
  35    } else {
  36        switch (n) {
  37        case 16:
  38            return gdb_get_reg32(mem_buf, env->sr);
  39        case 17:
  40            return gdb_get_reg32(mem_buf, env->pc);
  41        }
  42    }
  43    /* FP registers not included here because they vary between
  44       ColdFire and m68k.  Use XML bits for these.  */
  45    return 0;
  46}
  47
  48int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  49{
  50    M68kCPU *cpu = M68K_CPU(cs);
  51    CPUM68KState *env = &cpu->env;
  52    uint32_t tmp;
  53
  54    tmp = ldl_p(mem_buf);
  55
  56    if (n < 8) {
  57        /* D0-D7 */
  58        env->dregs[n] = tmp;
  59    } else if (n < 16) {
  60        /* A0-A7 */
  61        env->aregs[n - 8] = tmp;
  62    } else {
  63        switch (n) {
  64        case 16:
  65            env->sr = tmp;
  66            break;
  67        case 17:
  68            env->pc = tmp;
  69            break;
  70        default:
  71            return 0;
  72        }
  73    }
  74    return 4;
  75}
  76