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