qemu/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 #include "tcg.h"
  33
  34 /* code generation context */
  35 TCGContext tcg_ctx;
  36
  37 uint16_t gen_opc_buf[OPC_BUF_SIZE];
  38 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
  39
  40 target_ulong gen_opc_pc[OPC_BUF_SIZE];
  41 uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
  42 #if defined(TARGET_I386)
  43 uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
  44 #elif defined(TARGET_SPARC)
  45 target_ulong gen_opc_npc[OPC_BUF_SIZE];
  46 target_ulong gen_opc_jump_pc[2];
  47 #elif defined(TARGET_MIPS) || defined(TARGET_SH4)
  48 uint32_t gen_opc_hflags[OPC_BUF_SIZE];
  49 #endif
  50
  51 int code_copy_enabled = 1;
  52
  53 #ifdef CONFIG_PROFILER
  54 int64_t dyngen_tb_count1;
  55 int64_t dyngen_tb_count;
  56 int64_t dyngen_op_count;
  57 int64_t dyngen_old_op_count;
  58 int64_t dyngen_tcg_del_op_count;
  59 int dyngen_op_count_max;
  60 int64_t dyngen_code_in_len;
  61 int64_t dyngen_code_out_len;
  62 int64_t dyngen_interm_time;
  63 int64_t dyngen_code_time;
  64 int64_t dyngen_restore_count;
  65 int64_t dyngen_restore_time;
  66 #endif
  67
  68 /* XXX: suppress that */
  69 unsigned long code_gen_max_block_size(void)
  70 {
  71     static unsigned long max;
  72
  73     if (max == 0) {
  74 #define DEF(s, n, copy_size) max = copy_size > max? copy_size : max;
  75 #include "tcg-opc.h"
  76 #undef DEF
  77         max *= OPC_MAX_SIZE;
  78     }
  79
  80     return max;
  81 }
  82
  83 void cpu_gen_init(void)
  84 {
  85     tcg_context_init(&tcg_ctx);
  86     tcg_set_frame(&tcg_ctx, TCG_AREG0, offsetof(CPUState, temp_buf),
  87                   128 * sizeof(long));
  88 }
  89
  90 /* return non zero if the very first instruction is invalid so that
  91    the virtual CPU can trigger an exception.
  92
  93    '*gen_code_size_ptr' contains the size of the generated code (host
  94    code).
  95 */
  96 int cpu_gen_code(CPUState *env, TranslationBlock *tb, int *gen_code_size_ptr)
  97 {
  98     TCGContext *s = &tcg_ctx;
  99     uint8_t *gen_code_buf;
 100     int gen_code_size;
 101 #ifdef CONFIG_PROFILER
 102     int64_t ti;
 103 #endif
 104
 105 #ifdef CONFIG_PROFILER
 106     dyngen_tb_count1++; /* includes aborted translations because of
 107                            exceptions */
 108     ti = profile_getclock();
 109 #endif
 110     tcg_func_start(s);
 111
 112     if (gen_intermediate_code(env, tb) < 0)
 113         return -1;
 114
 115     /* generate machine code */
 116     gen_code_buf = tb->tc_ptr;
 117     tb->tb_next_offset[0] = 0xffff;
 118     tb->tb_next_offset[1] = 0xffff;
 119     s->tb_next_offset = tb->tb_next_offset;
 120 #ifdef USE_DIRECT_JUMP
 121     s->tb_jmp_offset = tb->tb_jmp_offset;
 122     s->tb_next = NULL;
 123     /* the following two entries are optional (only used for string ops) */
 124     /* XXX: not used ? */
 125     tb->tb_jmp_offset[2] = 0xffff;
 126     tb->tb_jmp_offset[3] = 0xffff;
 127 #else
 128     s->tb_jmp_offset = NULL;
 129     s->tb_next = tb->tb_next;
 130 #endif
 131
 132 #ifdef CONFIG_PROFILER
 133     dyngen_tb_count++;
 134     dyngen_interm_time += profile_getclock() - ti;
 135     dyngen_code_time -= profile_getclock();
 136 #endif
 137     gen_code_size = dyngen_code(s, gen_code_buf);
 138     *gen_code_size_ptr = gen_code_size;
 139 #ifdef CONFIG_PROFILER
 140     dyngen_code_time += profile_getclock();
 141     dyngen_code_in_len += tb->size;
 142     dyngen_code_out_len += gen_code_size;
 143 #endif
 144
 145 #ifdef DEBUG_DISAS
 146     if (loglevel & CPU_LOG_TB_OUT_ASM) {
 147         fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
 148         disas(logfile, tb->tc_ptr, *gen_code_size_ptr);
 149         fprintf(logfile, "\n");
 150         fflush(logfile);
 151     }
 152 #endif
 153     return 0;
 154 }
 155
 156 /* The cpu state corresponding to 'searched_pc' is restored.
 157  */
 158 int cpu_restore_state(TranslationBlock *tb,
 159                       CPUState *env, unsigned long searched_pc,
 160                       void *puc)
 161 {
 162     TCGContext *s = &tcg_ctx;
 163     int j;
 164     unsigned long tc_ptr;
 165 #ifdef CONFIG_PROFILER
 166     int64_t ti;
 167 #endif
 168
 169 #ifdef CONFIG_PROFILER
 170     ti = profile_getclock();
 171 #endif
 172     tcg_func_start(s);
 173
 174     if (gen_intermediate_code_pc(env, tb) < 0)
 175         return -1;
 176
 177     /* find opc index corresponding to search_pc */
 178     tc_ptr = (unsigned long)tb->tc_ptr;
 179     if (searched_pc < tc_ptr)
 180         return -1;
 181
 182     s->tb_next_offset = tb->tb_next_offset;
 183 #ifdef USE_DIRECT_JUMP
 184     s->tb_jmp_offset = tb->tb_jmp_offset;
 185     s->tb_next = NULL;
 186 #else
 187     s->tb_jmp_offset = NULL;
 188     s->tb_next = tb->tb_next;
 189 #endif
 190     j = dyngen_code_search_pc(s, (uint8_t *)tc_ptr, searched_pc - tc_ptr);
 191     if (j < 0)
 192         return -1;
 193     /* now find start of instruction before */
 194     while (gen_opc_instr_start[j] == 0)
 195         j--;
 196 #if defined(TARGET_I386)
 197     {
 198         int cc_op;
 199 #ifdef DEBUG_DISAS
 200         if (loglevel & CPU_LOG_TB_OP) {
 201             int i;
 202             fprintf(logfile, "RESTORE:\n");
 203             for(i=0;i<=j; i++) {
 204                 if (gen_opc_instr_start[i]) {
 205                     fprintf(logfile, "0x%04x: " TARGET_FMT_lx "\n", i, gen_opc_pc[i]);
 206                 }
 207             }
 208             fprintf(logfile, "spc=0x%08lx j=0x%x eip=" TARGET_FMT_lx " cs_base=%x\n",
 209                     searched_pc, j, gen_opc_pc[j] - tb->cs_base,
 210                     (uint32_t)tb->cs_base);
 211         }
 212 #endif
 213         env->eip = gen_opc_pc[j] - tb->cs_base;
 214         cc_op = gen_opc_cc_op[j];
 215         if (cc_op != CC_OP_DYNAMIC)
 216             env->cc_op = cc_op;
 217     }
 218 #elif defined(TARGET_ARM)
 219     env->regs[15] = gen_opc_pc[j];
 220 #elif defined(TARGET_SPARC)
 221     {
 222         target_ulong npc;
 223         env->pc = gen_opc_pc[j];
 224         npc = gen_opc_npc[j];
 225         if (npc == 1) {
 226             /* dynamic NPC: already stored */
 227         } else if (npc == 2) {
 228             target_ulong t2 = (target_ulong)(unsigned long)puc;
 229             /* jump PC: use T2 and the jump targets of the translation */
 230             if (t2)
 231                 env->npc = gen_opc_jump_pc[0];
 232             else
 233                 env->npc = gen_opc_jump_pc[1];
 234         } else {
 235             env->npc = npc;
 236         }
 237     }
 238 #elif defined(TARGET_PPC)
 239     {
 240         int type, c;
 241         /* for PPC, we need to look at the micro operation to get the
 242            access type */
 243         env->nip = gen_opc_pc[j];
 244         c = gen_opc_buf[j];
 245         switch(c) {
 246 #if defined(CONFIG_USER_ONLY)
 247 #define CASE3(op)\
 248         case INDEX_op_ ## op ## _raw
 249 #else
 250 #define CASE3(op)\
 251         case INDEX_op_ ## op ## _user:\
 252         case INDEX_op_ ## op ## _kernel:\
 253         case INDEX_op_ ## op ## _hypv
 254 #endif
 255
 256         CASE3(stfd):
 257         CASE3(stfs):
 258         CASE3(lfd):
 259         CASE3(lfs):
 260             type = ACCESS_FLOAT;
 261             break;
 262         CASE3(lwarx):
 263             type = ACCESS_RES;
 264             break;
 265         CASE3(stwcx):
 266             type = ACCESS_RES;
 267             break;
 268         CASE3(eciwx):
 269         CASE3(ecowx):
 270             type = ACCESS_EXT;
 271             break;
 272         default:
 273             type = ACCESS_INT;
 274             break;
 275         }
 276         env->access_type = type;
 277     }
 278 #elif defined(TARGET_M68K)
 279     env->pc = gen_opc_pc[j];
 280 #elif defined(TARGET_MIPS)
 281     env->PC[env->current_tc] = gen_opc_pc[j];
 282     env->hflags &= ~MIPS_HFLAG_BMASK;
 283     env->hflags |= gen_opc_hflags[j];
 284 #elif defined(TARGET_ALPHA)
 285     env->pc = gen_opc_pc[j];
 286 #elif defined(TARGET_SH4)
 287     env->pc = gen_opc_pc[j];
 288     env->flags = gen_opc_hflags[j];
 289 #endif
 290
 291 #ifdef CONFIG_PROFILER
 292     dyngen_restore_time += profile_getclock() - ti;
 293     dyngen_restore_count++;
 294 #endif
 295     return 0;
 296 }