translate-all.c

   1 /*
   2  *  Host code generation
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   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, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #include <stdarg.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <inttypes.h>
  25
  26 #include "config.h"
  27
  28 #define NO_CPU_IO_DEFS
  29 #include "cpu.h"
  30 #include "exec-all.h"
  31 #include "disas.h"
  32
  33 extern int dyngen_code(uint8_t *gen_code_buf,
  34                        uint16_t *label_offsets, uint16_t *jmp_offsets,
  35                        const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels);
  36
  37 enum {
  38 #define DEF(s, n, copy_size) INDEX_op_ ## s,
  39 #include "opc.h"
  40 #undef DEF
  41     NB_OPS,
  42 };
  43
  44 uint16_t gen_opc_buf[OPC_BUF_SIZE];
  45 uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE];
  46 long gen_labels[OPC_BUF_SIZE];
  47 int nb_gen_labels;
  48
  49 target_ulong gen_opc_pc[OPC_BUF_SIZE];
  50 uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
  51 #if defined(TARGET_I386)
  52 uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
  53 #elif defined(TARGET_SPARC)
  54 target_ulong gen_opc_npc[OPC_BUF_SIZE];
  55 target_ulong gen_opc_jump_pc[2];
  56 #endif
  57
  58 int code_copy_enabled = 1;
  59
  60 #ifdef DEBUG_DISAS
  61 static const char *op_str[] = {
  62 #define DEF(s, n, copy_size) #s,
  63 #include "opc.h"
  64 #undef DEF
  65 };
  66
  67 static uint8_t op_nb_args[] = {
  68 #define DEF(s, n, copy_size) n,
  69 #include "opc.h"
  70 #undef DEF
  71 };
  72
  73 static const unsigned short opc_copy_size[] = {
  74 #define DEF(s, n, copy_size) copy_size,
  75 #include "opc.h"
  76 #undef DEF
  77 };
  78
  79 void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf)
  80 {
  81     const uint16_t *opc_ptr;
  82     const uint32_t *opparam_ptr;
  83     int c, n, i;
  84
  85     opc_ptr = opc_buf;
  86     opparam_ptr = opparam_buf;
  87     for(;;) {
  88         c = *opc_ptr++;
  89         n = op_nb_args[c];
  90         fprintf(logfile, "0x%04x: %s",
  91                 (int)(opc_ptr - opc_buf - 1), op_str[c]);
  92         for(i = 0; i < n; i++) {
  93             fprintf(logfile, " 0x%x", opparam_ptr[i]);
  94         }
  95         fprintf(logfile, "\n");
  96         if (c == INDEX_op_end)
  97             break;
  98         opparam_ptr += n;
  99     }
 100 }
 101
 102 #endif
 103
 104 /* compute label info */
 105 static void dyngen_labels(long *gen_labels, int nb_gen_labels,
 106                           uint8_t *gen_code_buf, const uint16_t *opc_buf)
 107 {
 108     uint8_t *gen_code_ptr;
 109     int c, i;
 110     unsigned long gen_code_addr[OPC_BUF_SIZE];
 111
 112     if (nb_gen_labels == 0)
 113         return;
 114     /* compute the address of each op code */
 115
 116     gen_code_ptr = gen_code_buf;
 117     i = 0;
 118     for(;;) {
 119         c = opc_buf[i];
 120         gen_code_addr[i] =(unsigned long)gen_code_ptr;
 121         if (c == INDEX_op_end)
 122             break;
 123         gen_code_ptr += opc_copy_size[c];
 124         i++;
 125     }
 126
 127     /* compute the address of each label */
 128     for(i = 0; i < nb_gen_labels; i++) {
 129         gen_labels[i] = gen_code_addr[gen_labels[i]];
 130     }
 131 }
 132
 133 /* return non zero if the very first instruction is invalid so that
 134    the virtual CPU can trigger an exception.
 135
 136    '*gen_code_size_ptr' contains the size of the generated code (host
 137    code).
 138 */
 139 int cpu_gen_code(CPUState *env, TranslationBlock *tb,
 140                  int max_code_size, int *gen_code_size_ptr)
 141 {
 142     uint8_t *gen_code_buf;
 143     int gen_code_size;
 144
 145 #ifdef USE_CODE_COPY
 146     if (code_copy_enabled &&
 147         cpu_gen_code_copy(env, tb, max_code_size, &gen_code_size) == 0) {
 148         /* nothing more to do */
 149     } else
 150 #endif
 151     {
 152         if (gen_intermediate_code(env, tb) < 0)
 153             return -1;
 154
 155         /* generate machine code */
 156         tb->tb_next_offset[0] = 0xffff;
 157         tb->tb_next_offset[1] = 0xffff;
 158         gen_code_buf = tb->tc_ptr;
 159 #ifdef USE_DIRECT_JUMP
 160         /* the following two entries are optional (only used for string ops) */
 161         tb->tb_jmp_offset[2] = 0xffff;
 162         tb->tb_jmp_offset[3] = 0xffff;
 163 #endif
 164         dyngen_labels(gen_labels, nb_gen_labels, gen_code_buf, gen_opc_buf);
 165
 166         gen_code_size = dyngen_code(gen_code_buf, tb->tb_next_offset,
 167 #ifdef USE_DIRECT_JUMP
 168                                     tb->tb_jmp_offset,
 169 #else
 170                                     NULL,
 171 #endif
 172                                     gen_opc_buf, gen_opparam_buf, gen_labels);
 173     }
 174     *gen_code_size_ptr = gen_code_size;
 175 #ifdef DEBUG_DISAS
 176     if (loglevel & CPU_LOG_TB_OUT_ASM) {
 177         fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
 178         disas(logfile, tb->tc_ptr, *gen_code_size_ptr);
 179         fprintf(logfile, "\n");
 180         fflush(logfile);
 181     }
 182 #endif
 183     return 0;
 184 }
 185
 186 /* The cpu state corresponding to 'searched_pc' is restored.
 187  */
 188 int cpu_restore_state(TranslationBlock *tb,
 189                       CPUState *env, unsigned long searched_pc,
 190                       void *puc)
 191 {
 192     int j, c;
 193     unsigned long tc_ptr;
 194     uint16_t *opc_ptr;
 195
 196 #ifdef USE_CODE_COPY
 197     if (tb->cflags & CF_CODE_COPY) {
 198         return cpu_restore_state_copy(tb, env, searched_pc, puc);
 199     }
 200 #endif
 201     if (gen_intermediate_code_pc(env, tb) < 0)
 202         return -1;
 203
 204     /* find opc index corresponding to search_pc */
 205     tc_ptr = (unsigned long)tb->tc_ptr;
 206     if (searched_pc < tc_ptr)
 207         return -1;
 208     j = 0;
 209     opc_ptr = gen_opc_buf;
 210     for(;;) {
 211         c = *opc_ptr;
 212         if (c == INDEX_op_end)
 213             return -1;
 214         tc_ptr += opc_copy_size[c];
 215         if (searched_pc < tc_ptr)
 216             break;
 217         opc_ptr++;
 218     }
 219     j = opc_ptr - gen_opc_buf;
 220     /* now find start of instruction before */
 221     while (gen_opc_instr_start[j] == 0)
 222         j--;
 223 #if defined(TARGET_I386)
 224     {
 225         int cc_op;
 226 #ifdef DEBUG_DISAS
 227         if (loglevel & CPU_LOG_TB_OP) {
 228             int i;
 229             fprintf(logfile, "RESTORE:\n");
 230             for(i=0;i<=j; i++) {
 231                 if (gen_opc_instr_start[i]) {
 232                     fprintf(logfile, "0x%04x: " TARGET_FMT_lx "\n", i, gen_opc_pc[i]);
 233                 }
 234             }
 235             fprintf(logfile, "spc=0x%08lx j=0x%x eip=" TARGET_FMT_lx " cs_base=%x\n",
 236                     searched_pc, j, gen_opc_pc[j] - tb->cs_base,
 237                     (uint32_t)tb->cs_base);
 238         }
 239 #endif
 240         env->eip = gen_opc_pc[j] - tb->cs_base;
 241         cc_op = gen_opc_cc_op[j];
 242         if (cc_op != CC_OP_DYNAMIC)
 243             env->cc_op = cc_op;
 244     }
 245 #elif defined(TARGET_ARM)
 246     env->regs[15] = gen_opc_pc[j];
 247 #elif defined(TARGET_SPARC)
 248     {
 249         target_ulong npc;
 250         env->pc = gen_opc_pc[j];
 251         npc = gen_opc_npc[j];
 252         if (npc == 1) {
 253             /* dynamic NPC: already stored */
 254         } else if (npc == 2) {
 255             target_ulong t2 = (target_ulong)puc;
 256             /* jump PC: use T2 and the jump targets of the translation */
 257             if (t2)
 258                 env->npc = gen_opc_jump_pc[0];
 259             else
 260                 env->npc = gen_opc_jump_pc[1];
 261         } else {
 262             env->npc = npc;
 263         }
 264     }
 265 #elif defined(TARGET_PPC)
 266     {
 267         int type;
 268         /* for PPC, we need to look at the micro operation to get the
 269            access type */
 270         env->nip = gen_opc_pc[j];
 271         switch(c) {
 272 #if defined(CONFIG_USER_ONLY)
 273 #define CASE3(op)\
 274         case INDEX_op_ ## op ## _raw
 275 #else
 276 #define CASE3(op)\
 277         case INDEX_op_ ## op ## _user:\
 278         case INDEX_op_ ## op ## _kernel
 279 #endif
 280
 281         CASE3(stfd):
 282         CASE3(stfs):
 283         CASE3(lfd):
 284         CASE3(lfs):
 285             type = ACCESS_FLOAT;
 286             break;
 287         CASE3(lwarx):
 288             type = ACCESS_RES;
 289             break;
 290         CASE3(stwcx):
 291             type = ACCESS_RES;
 292             break;
 293         CASE3(eciwx):
 294         CASE3(ecowx):
 295             type = ACCESS_EXT;
 296             break;
 297         default:
 298             type = ACCESS_INT;
 299             break;
 300         }
 301         env->access_type = type;
 302     }
 303 #elif defined(TARGET_MIPS)
 304     env->PC = gen_opc_pc[j];
 305 #endif
 306     return 0;
 307 }