/* *  Host code generation * *  Copyright (c) 2003 Fabrice Bellard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */#include <stdarg.h>#include <stdlib.h>#include <stdio.h>#include <string.h>#include <inttypes.h>#include "config.h"#define NO_CPU_IO_DEFS#include "cpu.h"#include "exec-all.h"#include "disas.h"extern int dyngen_code(uint8_t *gen_code_buf,                       uint16_t *label_offsets, uint16_t *jmp_offsets,                       const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels);enum {#define DEF(s, n, copy_size) INDEX_op_ ## s,#include "opc.h"#undef DEF    NB_OPS,};uint16_t gen_opc_buf[OPC_BUF_SIZE];uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE];long gen_labels[OPC_BUF_SIZE];int nb_gen_labels;target_ulong gen_opc_pc[OPC_BUF_SIZE];uint8_t gen_opc_instr_start[OPC_BUF_SIZE];#if defined(TARGET_I386)uint8_t gen_opc_cc_op[OPC_BUF_SIZE];#elif defined(TARGET_SPARC)target_ulong gen_opc_npc[OPC_BUF_SIZE];target_ulong gen_opc_jump_pc[2];#elif defined(TARGET_MIPS) || defined(TARGET_SH4)uint32_t gen_opc_hflags[OPC_BUF_SIZE];#endifint code_copy_enabled = 1;#ifdef DEBUG_DISASstatic const char *op_str[] = {#define DEF(s, n, copy_size) #s,#include "opc.h"#undef DEF};static uint8_t op_nb_args[] = {#define DEF(s, n, copy_size) n,#include "opc.h"#undef DEF};static const unsigned short opc_copy_size[] = {#define DEF(s, n, copy_size) copy_size,#include "opc.h"#undef DEF};void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf){    const uint16_t *opc_ptr;    const uint32_t *opparam_ptr;    int c, n, i;    opc_ptr = opc_buf;    opparam_ptr = opparam_buf;    for(;;) {        c = *opc_ptr++;        n = op_nb_args[c];        fprintf(logfile, "0x%04x: %s",                (int)(opc_ptr - opc_buf - 1), op_str[c]);        for(i = 0; i < n; i++) {            fprintf(logfile, " 0x%x", opparam_ptr[i]);        }        fprintf(logfile, "\n");        if (c == INDEX_op_end)            break;        opparam_ptr += n;    }}#endif/* compute label info */static void dyngen_labels(long *gen_labels, int nb_gen_labels,                          uint8_t *gen_code_buf, const uint16_t *opc_buf){    uint8_t *gen_code_ptr;    int c, i;    unsigned long gen_code_addr[OPC_BUF_SIZE];    if (nb_gen_labels == 0)        return;    /* compute the address of each op code */    gen_code_ptr = gen_code_buf;    i = 0;    for(;;) {        c = opc_buf[i];        gen_code_addr[i] =(unsigned long)gen_code_ptr;        if (c == INDEX_op_end)            break;        gen_code_ptr += opc_copy_size[c];        i++;    }    /* compute the address of each label */    for(i = 0; i < nb_gen_labels; i++) {        gen_labels[i] = gen_code_addr[gen_labels[i]];    }}unsigned long code_gen_max_block_size(void){    static unsigned long max;    if (max == 0) {#define DEF(s, n, copy_size) max = copy_size > max? copy_size : max;#include "opc.h"#undef DEF        max *= OPC_MAX_SIZE;    }    return max;}/* return non zero if the very first instruction is invalid so that   the virtual CPU can trigger an exception.   '*gen_code_size_ptr' contains the size of the generated code (host   code).*/int cpu_gen_code(CPUState *env, TranslationBlock *tb, int *gen_code_size_ptr){    uint8_t *gen_code_buf;    int gen_code_size;    if (gen_intermediate_code(env, tb) < 0)        return -1;        /* generate machine code */    tb->tb_next_offset[0] = 0xffff;    tb->tb_next_offset[1] = 0xffff;    gen_code_buf = tb->tc_ptr;#ifdef USE_DIRECT_JUMP    /* the following two entries are optional (only used for string ops) */    tb->tb_jmp_offset[2] = 0xffff;    tb->tb_jmp_offset[3] = 0xffff;#endif    dyngen_labels(gen_labels, nb_gen_labels, gen_code_buf, gen_opc_buf);        gen_code_size = dyngen_code(gen_code_buf, tb->tb_next_offset,#ifdef USE_DIRECT_JUMP                                tb->tb_jmp_offset,#else                                NULL,#endif                                gen_opc_buf, gen_opparam_buf, gen_labels);    *gen_code_size_ptr = gen_code_size;#ifdef DEBUG_DISAS    if (loglevel & CPU_LOG_TB_OUT_ASM) {        fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);        disas(logfile, tb->tc_ptr, *gen_code_size_ptr);        fprintf(logfile, "\n");        fflush(logfile);    }#endif    return 0;}/* The cpu state corresponding to 'searched_pc' is restored. */int cpu_restore_state(TranslationBlock *tb,                      CPUState *env, unsigned long searched_pc,                      void *puc){    int j, c;    unsigned long tc_ptr;    uint16_t *opc_ptr;    if (gen_intermediate_code_pc(env, tb) < 0)        return -1;    /* find opc index corresponding to search_pc */    tc_ptr = (unsigned long)tb->tc_ptr;    if (searched_pc < tc_ptr)        return -1;    j = 0;    opc_ptr = gen_opc_buf;    for(;;) {        c = *opc_ptr;        if (c == INDEX_op_end)            return -1;        tc_ptr += opc_copy_size[c];        if (searched_pc < tc_ptr)            break;        opc_ptr++;    }    j = opc_ptr - gen_opc_buf;    /* now find start of instruction before */    while (gen_opc_instr_start[j] == 0)        j--;#if defined(TARGET_I386)    {        int cc_op;#ifdef DEBUG_DISAS        if (loglevel & CPU_LOG_TB_OP) {            int i;            fprintf(logfile, "RESTORE:\n");            for(i=0;i<=j; i++) {                if (gen_opc_instr_start[i]) {                    fprintf(logfile, "0x%04x: " TARGET_FMT_lx "\n", i, gen_opc_pc[i]);                }            }            fprintf(logfile, "spc=0x%08lx j=0x%x eip=" TARGET_FMT_lx " cs_base=%x\n",                    searched_pc, j, gen_opc_pc[j] - tb->cs_base,                    (uint32_t)tb->cs_base);        }#endif        env->eip = gen_opc_pc[j] - tb->cs_base;        cc_op = gen_opc_cc_op[j];        if (cc_op != CC_OP_DYNAMIC)            env->cc_op = cc_op;    }#elif defined(TARGET_ARM)    env->regs[15] = gen_opc_pc[j];#elif defined(TARGET_SPARC)    {        target_ulong npc;        env->pc = gen_opc_pc[j];        npc = gen_opc_npc[j];        if (npc == 1) {            /* dynamic NPC: already stored */        } else if (npc == 2) {            target_ulong t2 = (target_ulong)(unsigned long)puc;            /* jump PC: use T2 and the jump targets of the translation */            if (t2)                env->npc = gen_opc_jump_pc[0];            else                env->npc = gen_opc_jump_pc[1];        } else {            env->npc = npc;        }    }#elif defined(TARGET_PPC)    {        int type;        /* for PPC, we need to look at the micro operation to get the           access type */        env->nip = gen_opc_pc[j];        switch(c) {#if defined(CONFIG_USER_ONLY)#define CASE3(op)\        case INDEX_op_ ## op ## _raw#else#define CASE3(op)\        case INDEX_op_ ## op ## _user:\        case INDEX_op_ ## op ## _kernel:\        case INDEX_op_ ## op ## _hypv#endif        CASE3(stfd):        CASE3(stfs):        CASE3(lfd):        CASE3(lfs):            type = ACCESS_FLOAT;            break;        CASE3(lwarx):            type = ACCESS_RES;            break;        CASE3(stwcx):            type = ACCESS_RES;            break;        CASE3(eciwx):        CASE3(ecowx):            type = ACCESS_EXT;            break;        default:            type = ACCESS_INT;            break;        }        env->access_type = type;    }#elif defined(TARGET_M68K)    env->pc = gen_opc_pc[j];#elif defined(TARGET_MIPS)    env->PC[env->current_tc] = gen_opc_pc[j];    env->hflags &= ~MIPS_HFLAG_BMASK;    env->hflags |= gen_opc_hflags[j];#elif defined(TARGET_ALPHA)    env->pc = gen_opc_pc[j];#elif defined(TARGET_SH4)    env->pc = gen_opc_pc[j];    env->flags = gen_opc_hflags[j];#endif    return 0;}