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 #elif defined(TARGET_MIPS)
  57 uint32_t gen_opc_hflags[OPC_BUF_SIZE];
  58 #endif
  59
  60 int code_copy_enabled = 1;
  61
  62 #ifdef DEBUG_DISAS
  63 static const char *op_str[] = {
  64 #define DEF(s, n, copy_size) #s,
  65 #include "opc.h"
  66 #undef DEF
  67 };
  68
  69 static uint8_t op_nb_args[] = {
  70 #define DEF(s, n, copy_size) n,
  71 #include "opc.h"
  72 #undef DEF
  73 };
  74
  75 static const unsigned short opc_copy_size[] = {
  76 #define DEF(s, n, copy_size) copy_size,
  77 #include "opc.h"
  78 #undef DEF
  79 };
  80
  81 void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf)
  82 {
  83     const uint16_t *opc_ptr;
  84     const uint32_t *opparam_ptr;
  85     int c, n, i;
  86
  87     opc_ptr = opc_buf;
  88     opparam_ptr = opparam_buf;
  89     for(;;) {
  90         c = *opc_ptr++;
  91         n = op_nb_args[c];
  92         fprintf(logfile, "0x%04x: %s",
  93                 (int)(opc_ptr - opc_buf - 1), op_str[c]);
  94         for(i = 0; i < n; i++) {
  95             fprintf(logfile, " 0x%x", opparam_ptr[i]);
  96         }
  97         fprintf(logfile, "\n");
  98         if (c == INDEX_op_end)
  99             break;
 100         opparam_ptr += n;
 101     }
 102 }
 103
 104 #endif
 105
 106 /* compute label info */
 107 static void dyngen_labels(long *gen_labels, int nb_gen_labels,
 108                           uint8_t *gen_code_buf, const uint16_t *opc_buf)
 109 {
 110     uint8_t *gen_code_ptr;
 111     int c, i;
 112     unsigned long gen_code_addr[OPC_BUF_SIZE];
 113
 114     if (nb_gen_labels == 0)
 115         return;
 116     /* compute the address of each op code */
 117
 118     gen_code_ptr = gen_code_buf;
 119     i = 0;
 120     for(;;) {
 121         c = opc_buf[i];
 122         gen_code_addr[i] =(unsigned long)gen_code_ptr;
 123         if (c == INDEX_op_end)
 124             break;
 125         gen_code_ptr += opc_copy_size[c];
 126         i++;
 127     }
 128
 129     /* compute the address of each label */
 130     for(i = 0; i < nb_gen_labels; i++) {
 131         gen_labels[i] = gen_code_addr[gen_labels[i]];
 132     }
 133 }
 134
 135 /* return non zero if the very first instruction is invalid so that
 136    the virtual CPU can trigger an exception.
 137
 138    '*gen_code_size_ptr' contains the size of the generated code (host
 139    code).
 140 */
 141 int cpu_gen_code(CPUState *env, TranslationBlock *tb,
 142                  int max_code_size, int *gen_code_size_ptr)
 143 {
 144     uint8_t *gen_code_buf;
 145     int gen_code_size;
 146
 147 #ifdef USE_CODE_COPY
 148     if (code_copy_enabled &&
 149         cpu_gen_code_copy(env, tb, max_code_size, &gen_code_size) == 0) {
 150         /* nothing more to do */
 151     } else
 152 #endif
 153     {
 154         if (gen_intermediate_code(env, tb) < 0)
 155             return -1;
 156
 157         /* generate machine code */
 158         tb->tb_next_offset[0] = 0xffff;
 159         tb->tb_next_offset[1] = 0xffff;
 160         gen_code_buf = tb->tc_ptr;
 161 #ifdef USE_DIRECT_JUMP
 162         /* the following two entries are optional (only used for string ops) */
 163         tb->tb_jmp_offset[2] = 0xffff;
 164         tb->tb_jmp_offset[3] = 0xffff;
 165 #endif
 166         dyngen_labels(gen_labels, nb_gen_labels, gen_code_buf, gen_opc_buf);
 167
 168         gen_code_size = dyngen_code(gen_code_buf, tb->tb_next_offset,
 169 #ifdef USE_DIRECT_JUMP
 170                                     tb->tb_jmp_offset,
 171 #else
 172                                     NULL,
 173 #endif
 174                                     gen_opc_buf, gen_opparam_buf, gen_labels);
 175     }
 176     *gen_code_size_ptr = gen_code_size;
 177 #ifdef DEBUG_DISAS
 178     if (loglevel & CPU_LOG_TB_OUT_ASM) {
 179         fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
 180         disas(logfile, tb->tc_ptr, *gen_code_size_ptr);
 181         fprintf(logfile, "\n");
 182         fflush(logfile);
 183     }
 184 #endif
 185     return 0;
 186 }
 187
 188 /* The cpu state corresponding to 'searched_pc' is restored.
 189  */
 190 int cpu_restore_state(TranslationBlock *tb,
 191                       CPUState *env, unsigned long searched_pc,
 192                       void *puc)
 193 {
 194     int j, c;
 195     unsigned long tc_ptr;
 196     uint16_t *opc_ptr;
 197
 198 #ifdef USE_CODE_COPY
 199     if (tb->cflags & CF_CODE_COPY) {
 200         return cpu_restore_state_copy(tb, env, searched_pc, puc);
 201     }
 202 #endif
 203     if (gen_intermediate_code_pc(env, tb) < 0)
 204         return -1;
 205
 206     /* find opc index corresponding to search_pc */
 207     tc_ptr = (unsigned long)tb->tc_ptr;
 208     if (searched_pc < tc_ptr)
 209         return -1;
 210     j = 0;
 211     opc_ptr = gen_opc_buf;
 212     for(;;) {
 213         c = *opc_ptr;
 214         if (c == INDEX_op_end)
 215             return -1;
 216         tc_ptr += opc_copy_size[c];
 217         if (searched_pc < tc_ptr)
 218             break;
 219         opc_ptr++;
 220     }
 221     j = opc_ptr - gen_opc_buf;
 222     /* now find start of instruction before */
 223     while (gen_opc_instr_start[j] == 0)
 224         j--;
 225 #if defined(TARGET_I386)
 226     {
 227         int cc_op;
 228 #ifdef DEBUG_DISAS
 229         if (loglevel & CPU_LOG_TB_OP) {
 230             int i;
 231             fprintf(logfile, "RESTORE:\n");
 232             for(i=0;i<=j; i++) {
 233                 if (gen_opc_instr_start[i]) {
 234                     fprintf(logfile, "0x%04x: " TARGET_FMT_lx "\n", i, gen_opc_pc[i]);
 235                 }
 236             }
 237             fprintf(logfile, "spc=0x%08lx j=0x%x eip=" TARGET_FMT_lx " cs_base=%x\n",
 238                     searched_pc, j, gen_opc_pc[j] - tb->cs_base,
 239                     (uint32_t)tb->cs_base);
 240         }
 241 #endif
 242         env->eip = gen_opc_pc[j] - tb->cs_base;
 243         cc_op = gen_opc_cc_op[j];
 244         if (cc_op != CC_OP_DYNAMIC)
 245             env->cc_op = cc_op;
 246     }
 247 #elif defined(TARGET_ARM)
 248     env->regs[15] = gen_opc_pc[j];
 249 #elif defined(TARGET_SPARC)
 250     {
 251         target_ulong npc;
 252         env->pc = gen_opc_pc[j];
 253         npc = gen_opc_npc[j];
 254         if (npc == 1) {
 255             /* dynamic NPC: already stored */
 256         } else if (npc == 2) {
 257             target_ulong t2 = (target_ulong)puc;
 258             /* jump PC: use T2 and the jump targets of the translation */
 259             if (t2)
 260                 env->npc = gen_opc_jump_pc[0];
 261             else
 262                 env->npc = gen_opc_jump_pc[1];
 263         } else {
 264             env->npc = npc;
 265         }
 266     }
 267 #elif defined(TARGET_PPC)
 268     {
 269         int type;
 270         /* for PPC, we need to look at the micro operation to get the
 271            access type */
 272         env->nip = gen_opc_pc[j];
 273         switch(c) {
 274 #if defined(CONFIG_USER_ONLY)
 275 #define CASE3(op)\
 276         case INDEX_op_ ## op ## _raw
 277 #else
 278 #define CASE3(op)\
 279         case INDEX_op_ ## op ## _user:\
 280         case INDEX_op_ ## op ## _kernel
 281 #endif
 282
 283         CASE3(stfd):
 284         CASE3(stfs):
 285         CASE3(lfd):
 286         CASE3(lfs):
 287             type = ACCESS_FLOAT;
 288             break;
 289         CASE3(lwarx):
 290             type = ACCESS_RES;
 291             break;
 292         CASE3(stwcx):
 293             type = ACCESS_RES;
 294             break;
 295         CASE3(eciwx):
 296         CASE3(ecowx):
 297             type = ACCESS_EXT;
 298             break;
 299         default:
 300             type = ACCESS_INT;
 301             break;
 302         }
 303         env->access_type = type;
 304     }
 305 #elif defined(TARGET_MIPS)
 306     env->PC = gen_opc_pc[j];
 307     env->hflags &= ~MIPS_HFLAG_BMASK;
 308     env->hflags |= gen_opc_hflags[j];
 309 #endif
 310     return 0;
 311 }