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 "config.h"
  21 #include "qemu-common.h"
  22 #include "exec/gdbstub.h"
  23
  24 int 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 = env->ir[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
  60 int 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         env->ir[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 }