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