target-microblaze/gdbstub.c

   1 /*
   2  * MicroBlaze 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
  24 int mb_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  25 {
  26     MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
  27     CPUMBState *env = &cpu->env;
  28
  29     if (n < 32) {
  30         return gdb_get_reg32(mem_buf, env->regs[n]);
  31     } else {
  32         return gdb_get_reg32(mem_buf, env->sregs[n - 32]);
  33     }
  34     return 0;
  35 }
  36
  37 int mb_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  38 {
  39     MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
  40     CPUClass *cc = CPU_GET_CLASS(cs);
  41     CPUMBState *env = &cpu->env;
  42     uint32_t tmp;
  43
  44     if (n > cc->gdb_num_core_regs) {
  45         return 0;
  46     }
  47
  48     tmp = ldl_p(mem_buf);
  49
  50     if (n < 32) {
  51         env->regs[n] = tmp;
  52     } else {
  53         env->sregs[n - 32] = tmp;
  54     }
  55     return 4;
  56 }