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