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 2.1 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 "cpu.h"
  22#include "exec/gdbstub.h"
  23
  24int m68k_cpu_gdb_read_register(CPUState *cs, GByteArray *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            /* SR is made of SR+CCR, CCR is many 1bit flags so uses helper */
  39            return gdb_get_reg32(mem_buf, env->sr | cpu_m68k_get_ccr(env));
  40        case 17:
  41            return gdb_get_reg32(mem_buf, env->pc);
  42        }
  43    }
  44    /*
  45     * FP registers not included here because they vary between
  46     * ColdFire and m68k.  Use XML bits for these.
  47     */
  48    return 0;
  49}
  50
  51int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  52{
  53    M68kCPU *cpu = M68K_CPU(cs);
  54    CPUM68KState *env = &cpu->env;
  55    uint32_t tmp;
  56
  57    tmp = ldl_p(mem_buf);
  58
  59    if (n < 8) {
  60        /* D0-D7 */
  61        env->dregs[n] = tmp;
  62    } else if (n < 16) {
  63        /* A0-A7 */
  64        env->aregs[n - 8] = tmp;
  65    } else {
  66        switch (n) {
  67        case 16:
  68            cpu_m68k_set_sr(env, tmp);
  69            break;
  70        case 17:
  71            env->pc = tmp;
  72            break;
  73        default:
  74            return 0;
  75        }
  76    }
  77    return 4;
  78}
  79