LXR qemu/target-alpha/gdbstub.c

   1/*
   2 * Alpha 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 alpha_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  25{
  26    AlphaCPU *cpu = ALPHA_CPU(cs);
  27    CPUAlphaState *env = &cpu->env;
  28    uint64_t val;
  29    CPU_DoubleU d;
  30
  31    switch (n) {
  32    case 0 ... 30:
  33        val = cpu_alpha_load_gr(env, n);
  34        break;
  35    case 32 ... 62:
  36        d.d = env->fir[n - 32];
  37        val = d.ll;
  38        break;
  39    case 63:
  40        val = cpu_alpha_load_fpcr(env);
  41        break;
  42    case 64:
  43        val = env->pc;
  44        break;
  45    case 66:
  46        val = env->unique;
  47        break;
  48    case 31:
  49    case 65:
  50        /* 31 really is the zero register; 65 is unassigned in the
  51           gdb protocol, but is still required to occupy 8 bytes. */
  52        val = 0;
  53        break;
  54    default:
  55        return 0;
  56    }
  57    return gdb_get_regl(mem_buf, val);
  58}
  59
  60int alpha_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  61{
  62    AlphaCPU *cpu = ALPHA_CPU(cs);
  63    CPUAlphaState *env = &cpu->env;
  64    target_ulong tmp = ldtul_p(mem_buf);
  65    CPU_DoubleU d;
  66
  67    switch (n) {
  68    case 0 ... 30:
  69        cpu_alpha_store_gr(env, n, tmp);
  70        break;
  71    case 32 ... 62:
  72        d.ll = tmp;
  73        env->fir[n - 32] = d.d;
  74        break;
  75    case 63:
  76        cpu_alpha_store_fpcr(env, tmp);
  77        break;
  78    case 64:
  79        env->pc = tmp;
  80        break;
  81    case 66:
  82        env->unique = tmp;
  83        break;
  84    case 31:
  85    case 65:
  86        /* 31 really is the zero register; 65 is unassigned in the
  87           gdb protocol, but is still required to occupy 8 bytes. */
  88        break;
  89    default:
  90        return 0;
  91    }
  92    return 8;
  93}
  94