target/hppa/gdbstub.c

   1 /*
   2  * HPPA gdb server stub
   3  *
   4  * Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "qemu-common.h"
  22 #include "cpu.h"
  23 #include "exec/gdbstub.h"
  24
  25 int hppa_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  26 {
  27     HPPACPU *cpu = HPPA_CPU(cs);
  28     CPUHPPAState *env = &cpu->env;
  29     target_ulong val;
  30
  31     switch (n) {
  32     case 0:
  33         val = cpu_hppa_get_psw(env);
  34         break;
  35     case 1 ... 31:
  36         val = env->gr[n];
  37         break;
  38     case 32:
  39         val = env->sar;
  40         break;
  41     case 33:
  42         val = env->iaoq_f;
  43         break;
  44     case 35:
  45         val = env->iaoq_b;
  46         break;
  47     case 59:
  48         val = env->cr26;
  49         break;
  50     case 60:
  51         val = env->cr27;
  52         break;
  53     case 64 ... 127:
  54         val = extract64(env->fr[(n - 64) / 2], (n & 1 ? 0 : 32), 32);
  55         break;
  56     default:
  57         if (n < 128) {
  58             val = 0;
  59         } else {
  60             return 0;
  61         }
  62         break;
  63     }
  64     return gdb_get_regl(mem_buf, val);
  65 }
  66
  67 int hppa_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  68 {
  69     HPPACPU *cpu = HPPA_CPU(cs);
  70     CPUHPPAState *env = &cpu->env;
  71     target_ulong val = ldtul_p(mem_buf);
  72
  73     switch (n) {
  74     case 0:
  75         cpu_hppa_put_psw(env, val);
  76         break;
  77     case 1 ... 31:
  78         env->gr[n] = val;
  79         break;
  80     case 32:
  81         env->sar = val;
  82         break;
  83     case 33:
  84         env->iaoq_f = val;
  85         break;
  86     case 35:
  87         env->iaoq_b = val;
  88         break;
  89     case 59:
  90         env->cr26 = val;
  91         break;
  92     case 60:
  93         env->cr27 = val;
  94         break;
  95     case 64:
  96         env->fr[0] = deposit64(env->fr[0], 32, 32, val);
  97         cpu_hppa_loaded_fr0(env);
  98         break;
  99     case 65 ... 127:
 100         {
 101             uint64_t *fr = &env->fr[(n - 64) / 2];
 102             *fr = deposit64(*fr, val, (n & 1 ? 0 : 32), 32);
 103         }
 104         break;
 105     default:
 106         if (n >= 128) {
 107             return 0;
 108         }
 109         break;
 110     }
 111     return sizeof(target_ulong);
 112 }