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