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