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 uint32_t gen_opc_pc[OPC_BUF_SIZE];
  46 uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
  47 #if defined(TARGET_I386)
  48 uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
  49 #endif
  50
  51 #ifdef DEBUG_DISAS
  52 static const char *op_str[] = {
  53 #define DEF(s, n, copy_size) #s,
  54 #include "opc.h"
  55 #undef DEF
  56 };
  57
  58 static uint8_t op_nb_args[] = {
  59 #define DEF(s, n, copy_size) n,
  60 #include "opc.h"
  61 #undef DEF
  62 };
  63
  64 void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf)
  65 {
  66     const uint16_t *opc_ptr;
  67     const uint32_t *opparam_ptr;
  68     int c, n, i;
  69
  70     opc_ptr = opc_buf;
  71     opparam_ptr = opparam_buf;
  72     for(;;) {
  73         c = *opc_ptr++;
  74         n = op_nb_args[c];
  75         fprintf(logfile, "0x%04x: %s",
  76                 (int)(opc_ptr - opc_buf - 1), op_str[c]);
  77         for(i = 0; i < n; i++) {
  78             fprintf(logfile, " 0x%x", opparam_ptr[i]);
  79         }
  80         fprintf(logfile, "\n");
  81         if (c == INDEX_op_end)
  82             break;
  83         opparam_ptr += n;
  84     }
  85 }
  86
  87 #endif
  88
  89 /* return non zero if the very first instruction is invalid so that
  90    the virtual CPU can trigger an exception.
  91
  92    '*gen_code_size_ptr' contains the size of the generated code (host
  93    code).
  94 */
  95 int cpu_gen_code(CPUState *env, TranslationBlock *tb,
  96                  int max_code_size, int *gen_code_size_ptr)
  97 {
  98     uint8_t *gen_code_buf;
  99     int gen_code_size;
 100
 101     if (gen_intermediate_code(env, tb) < 0)
 102         return -1;
 103
 104     /* generate machine code */
 105     tb->tb_next_offset[0] = 0xffff;
 106     tb->tb_next_offset[1] = 0xffff;
 107     gen_code_buf = tb->tc_ptr;
 108 #ifdef USE_DIRECT_JUMP
 109     /* the following two entries are optional (only used for string ops) */
 110     tb->tb_jmp_offset[2] = 0xffff;
 111     tb->tb_jmp_offset[3] = 0xffff;
 112 #endif
 113     gen_code_size = dyngen_code(gen_code_buf, tb->tb_next_offset,
 114 #ifdef USE_DIRECT_JUMP
 115                                 tb->tb_jmp_offset,
 116 #else
 117                                 NULL,
 118 #endif
 119                                 gen_opc_buf, gen_opparam_buf);
 120     *gen_code_size_ptr = gen_code_size;
 121 #ifdef DEBUG_DISAS
 122     if (loglevel && 0) {
 123         fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
 124         disas(logfile, gen_code_buf, *gen_code_size_ptr, 1, 0);
 125         fprintf(logfile, "\n");
 126         fflush(logfile);
 127     }
 128 #endif
 129     return 0;
 130 }
 131
 132 static const unsigned short opc_copy_size[] = {
 133 #define DEF(s, n, copy_size) copy_size,
 134 #include "opc.h"
 135 #undef DEF
 136 };
 137
 138 /* The cpu state corresponding to 'searched_pc' is restored.
 139  */
 140 int cpu_restore_state(TranslationBlock *tb,
 141                       CPUState *env, unsigned long searched_pc)
 142 {
 143     int j, c;
 144     unsigned long tc_ptr;
 145     uint16_t *opc_ptr;
 146
 147     if (gen_intermediate_code_pc(env, tb) < 0)
 148         return -1;
 149
 150     /* find opc index corresponding to search_pc */
 151     tc_ptr = (unsigned long)tb->tc_ptr;
 152     if (searched_pc < tc_ptr)
 153         return -1;
 154     j = 0;
 155     opc_ptr = gen_opc_buf;
 156     for(;;) {
 157         c = *opc_ptr;
 158         if (c == INDEX_op_end)
 159             return -1;
 160         tc_ptr += opc_copy_size[c];
 161         if (searched_pc < tc_ptr)
 162             break;
 163         opc_ptr++;
 164     }
 165     j = opc_ptr - gen_opc_buf;
 166     /* now find start of instruction before */
 167     while (gen_opc_instr_start[j] == 0)
 168         j--;
 169 #if defined(TARGET_I386)
 170     {
 171         int cc_op;
 172 #ifdef DEBUG_DISAS
 173         if (loglevel) {
 174             int i;
 175             fprintf(logfile, "RESTORE:\n");
 176             for(i=0;i<=j; i++) {
 177                 if (gen_opc_instr_start[i]) {
 178                     fprintf(logfile, "0x%04x: 0x%08x\n", i, gen_opc_pc[i]);
 179                 }
 180             }
 181             fprintf(logfile, "spc=0x%08lx j=0x%x eip=0x%lx cs_base=%lx\n",
 182                     searched_pc, j, gen_opc_pc[j] - tb->cs_base, tb->cs_base);
 183         }
 184 #endif
 185         env->eip = gen_opc_pc[j] - tb->cs_base;
 186         cc_op = gen_opc_cc_op[j];
 187         if (cc_op != CC_OP_DYNAMIC)
 188             env->cc_op = cc_op;
 189     }
 190 #elif defined(TARGET_ARM)
 191     env->regs[15] = gen_opc_pc[j];
 192 #elif defined(TARGET_SPARC)
 193     env->pc = gen_opc_pc[j];
 194 #elif defined(TARGET_PPC)
 195     {
 196         int type;
 197         /* for PPC, we need to look at the micro operation to get the
 198            access type */
 199         env->nip = gen_opc_pc[j];
 200         switch(c) {
 201 #if defined(CONFIG_USER_ONLY)
 202 #define CASE3(op)\
 203         case INDEX_op_ ## op ## _raw
 204 #else
 205 #define CASE3(op)\
 206         case INDEX_op_ ## op ## _user:\
 207         case INDEX_op_ ## op ## _kernel
 208 #endif
 209
 210         CASE3(stfd):
 211         CASE3(stfs):
 212         CASE3(lfd):
 213         CASE3(lfs):
 214             type = ACCESS_FLOAT;
 215             break;
 216         CASE3(stwcx):
 217             type = ACCESS_RES;
 218             break;
 219         CASE3(eciwx):
 220         CASE3(ecowx):
 221             type = ACCESS_EXT;
 222             break;
 223         default:
 224             type = ACCESS_INT;
 225             break;
 226         }
 227         env->access_type = type;
 228     }
 229 #endif
 230     return 0;
 231 }