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 2.1 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 "gdbstub/helpers.h"
  23
  24 int alpha_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
  25 {
  26     CPUAlphaState *env = cpu_env(cs);
  27     uint64_t val;
  28     CPU_DoubleU d;
  29
  30     switch (n) {
  31     case 0 ... 30:
  32         val = cpu_alpha_load_gr(env, n);
  33         break;
  34     case 32 ... 62:
  35         d.d = env->fir[n - 32];
  36         val = d.ll;
  37         break;
  38     case 63:
  39         val = cpu_alpha_load_fpcr(env);
  40         break;
  41     case 64:
  42         val = env->pc;
  43         break;
  44     case 66:
  45         val = env->unique;
  46         break;
  47     case 31:
  48     case 65:
  49         /* 31 really is the zero register; 65 is unassigned in the
  50            gdb protocol, but is still required to occupy 8 bytes. */
  51         val = 0;
  52         break;
  53     default:
  54         return 0;
  55     }
  56     return gdb_get_regl(mem_buf, val);
  57 }
  58
  59 int alpha_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  60 {
  61     CPUAlphaState *env = cpu_env(cs);
  62     target_ulong tmp = ldtul_p(mem_buf);
  63     CPU_DoubleU d;
  64
  65     switch (n) {
  66     case 0 ... 30:
  67         cpu_alpha_store_gr(env, n, tmp);
  68         break;
  69     case 32 ... 62:
  70         d.ll = tmp;
  71         env->fir[n - 32] = d.d;
  72         break;
  73     case 63:
  74         cpu_alpha_store_fpcr(env, tmp);
  75         break;
  76     case 64:
  77         env->pc = tmp;
  78         break;
  79     case 66:
  80         env->unique = tmp;
  81         break;
  82     case 31:
  83     case 65:
  84         /* 31 really is the zero register; 65 is unassigned in the
  85            gdb protocol, but is still required to occupy 8 bytes. */
  86         break;
  87     default:
  88         return 0;
  89     }
  90     return 8;
  91 }