target/sparc/gdbstub.c

   1 /*
   2  * SPARC 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 "cpu.h"
  23 #include "exec/gdbstub.h"
  24
  25 #ifdef TARGET_ABI32
  26 #define gdb_get_rega(buf, val) gdb_get_reg32(buf, val)
  27 #else
  28 #define gdb_get_rega(buf, val) gdb_get_regl(buf, val)
  29 #endif
  30
  31 int sparc_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  32 {
  33     SPARCCPU *cpu = SPARC_CPU(cs);
  34     CPUSPARCState *env = &cpu->env;
  35
  36     if (n < 8) {
  37         /* g0..g7 */
  38         return gdb_get_rega(mem_buf, env->gregs[n]);
  39     }
  40     if (n < 32) {
  41         /* register window */
  42         return gdb_get_rega(mem_buf, env->regwptr[n - 8]);
  43     }
  44 #if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
  45     if (n < 64) {
  46         /* fprs */
  47         if (n & 1) {
  48             return gdb_get_reg32(mem_buf, env->fpr[(n - 32) / 2].l.lower);
  49         } else {
  50             return gdb_get_reg32(mem_buf, env->fpr[(n - 32) / 2].l.upper);
  51         }
  52     }
  53     /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
  54     switch (n) {
  55     case 64:
  56         return gdb_get_rega(mem_buf, env->y);
  57     case 65:
  58         return gdb_get_rega(mem_buf, cpu_get_psr(env));
  59     case 66:
  60         return gdb_get_rega(mem_buf, env->wim);
  61     case 67:
  62         return gdb_get_rega(mem_buf, env->tbr);
  63     case 68:
  64         return gdb_get_rega(mem_buf, env->pc);
  65     case 69:
  66         return gdb_get_rega(mem_buf, env->npc);
  67     case 70:
  68         return gdb_get_rega(mem_buf, env->fsr);
  69     case 71:
  70         return gdb_get_rega(mem_buf, 0); /* csr */
  71     default:
  72         return gdb_get_rega(mem_buf, 0);
  73     }
  74 #else
  75     if (n < 64) {
  76         /* f0-f31 */
  77         if (n & 1) {
  78             return gdb_get_reg32(mem_buf, env->fpr[(n - 32) / 2].l.lower);
  79         } else {
  80             return gdb_get_reg32(mem_buf, env->fpr[(n - 32) / 2].l.upper);
  81         }
  82     }
  83     if (n < 80) {
  84         /* f32-f62 (double width, even numbers only) */
  85         return gdb_get_reg64(mem_buf, env->fpr[(n - 32) / 2].ll);
  86     }
  87     switch (n) {
  88     case 80:
  89         return gdb_get_regl(mem_buf, env->pc);
  90     case 81:
  91         return gdb_get_regl(mem_buf, env->npc);
  92     case 82:
  93         return gdb_get_regl(mem_buf, (cpu_get_ccr(env) << 32) |
  94                                      ((env->asi & 0xff) << 24) |
  95                                      ((env->pstate & 0xfff) << 8) |
  96                                      cpu_get_cwp64(env));
  97     case 83:
  98         return gdb_get_regl(mem_buf, env->fsr);
  99     case 84:
 100         return gdb_get_regl(mem_buf, env->fprs);
 101     case 85:
 102         return gdb_get_regl(mem_buf, env->y);
 103     }
 104 #endif
 105     return 0;
 106 }
 107
 108 int sparc_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
 109 {
 110     SPARCCPU *cpu = SPARC_CPU(cs);
 111     CPUSPARCState *env = &cpu->env;
 112 #if defined(TARGET_ABI32)
 113     abi_ulong tmp;
 114
 115     tmp = ldl_p(mem_buf);
 116 #else
 117     target_ulong tmp;
 118
 119     tmp = ldtul_p(mem_buf);
 120 #endif
 121
 122     if (n < 8) {
 123         /* g0..g7 */
 124         env->gregs[n] = tmp;
 125     } else if (n < 32) {
 126         /* register window */
 127         env->regwptr[n - 8] = tmp;
 128     }
 129 #if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
 130     else if (n < 64) {
 131         /* fprs */
 132         /* f0-f31 */
 133         if (n & 1) {
 134             env->fpr[(n - 32) / 2].l.lower = tmp;
 135         } else {
 136             env->fpr[(n - 32) / 2].l.upper = tmp;
 137         }
 138     } else {
 139         /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
 140         switch (n) {
 141         case 64:
 142             env->y = tmp;
 143             break;
 144         case 65:
 145             cpu_put_psr(env, tmp);
 146             break;
 147         case 66:
 148             env->wim = tmp;
 149             break;
 150         case 67:
 151             env->tbr = tmp;
 152             break;
 153         case 68:
 154             env->pc = tmp;
 155             break;
 156         case 69:
 157             env->npc = tmp;
 158             break;
 159         case 70:
 160             env->fsr = tmp;
 161             break;
 162         default:
 163             return 0;
 164         }
 165     }
 166     return 4;
 167 #else
 168     else if (n < 64) {
 169         /* f0-f31 */
 170         tmp = ldl_p(mem_buf);
 171         if (n & 1) {
 172             env->fpr[(n - 32) / 2].l.lower = tmp;
 173         } else {
 174             env->fpr[(n - 32) / 2].l.upper = tmp;
 175         }
 176         return 4;
 177     } else if (n < 80) {
 178         /* f32-f62 (double width, even numbers only) */
 179         env->fpr[(n - 32) / 2].ll = tmp;
 180     } else {
 181         switch (n) {
 182         case 80:
 183             env->pc = tmp;
 184             break;
 185         case 81:
 186             env->npc = tmp;
 187             break;
 188         case 82:
 189             cpu_put_ccr(env, tmp >> 32);
 190             env->asi = (tmp >> 24) & 0xff;
 191             env->pstate = (tmp >> 8) & 0xfff;
 192             cpu_put_cwp64(env, tmp & 0xff);
 193             break;
 194         case 83:
 195             env->fsr = tmp;
 196             break;
 197         case 84:
 198             env->fprs = tmp;
 199             break;
 200         case 85:
 201             env->y = tmp;
 202             break;
 203         default:
 204             return 0;
 205         }
 206     }
 207     return 8;
 208 #endif
 209 }