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 "cpu.h"
  23#include "exec/gdbstub.h"
  24
  25int m68k_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  26{
  27    M68kCPU *cpu = M68K_CPU(cs);
  28    CPUM68KState *env = &cpu->env;
  29
  30    if (n < 8) {
  31        /* D0-D7 */
  32        return gdb_get_reg32(mem_buf, env->dregs[n]);
  33    } else if (n < 16) {
  34        /* A0-A7 */
  35        return gdb_get_reg32(mem_buf, env->aregs[n - 8]);
  36    } else {
  37        switch (n) {
  38        case 16:
  39            return gdb_get_reg32(mem_buf, env->sr);
  40        case 17:
  41            return gdb_get_reg32(mem_buf, env->pc);
  42        }
  43    }
  44    /* FP registers not included here because they vary between
  45       ColdFire and m68k.  Use XML bits for these.  */
  46    return 0;
  47}
  48
  49int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  50{
  51    M68kCPU *cpu = M68K_CPU(cs);
  52    CPUM68KState *env = &cpu->env;
  53    uint32_t tmp;
  54
  55    tmp = ldl_p(mem_buf);
  56
  57    if (n < 8) {
  58        /* D0-D7 */
  59        env->dregs[n] = tmp;
  60    } else if (n < 16) {
  61        /* A0-A7 */
  62        env->aregs[n - 8] = tmp;
  63    } else {
  64        switch (n) {
  65        case 16:
  66            env->sr = tmp;
  67            break;
  68        case 17:
  69            env->pc = tmp;
  70            break;
  71        default:
  72            return 0;
  73        }
  74    }
  75    return 4;
  76}
  77