op.c

xen虚拟机源代码安装包

/*
 *  i386 micro operations
 * 
 *  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
 */

#define ASM_SOFTMMU
#include "exec.h"

/* n must be a constant to be efficient */
static inline target_long lshift(target_long x, int n)
{
    if (n >= 0)
        return x << n;
    else
        return x >> (-n);
}

/* we define the various pieces of code used by the JIT */

#define REG EAX
#define REGNAME _EAX
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG ECX
#define REGNAME _ECX
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG EDX
#define REGNAME _EDX
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG EBX
#define REGNAME _EBX
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG ESP
#define REGNAME _ESP
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG EBP
#define REGNAME _EBP
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG ESI
#define REGNAME _ESI
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG EDI
#define REGNAME _EDI
#include "opreg_template.h"
#undef REG
#undef REGNAME

#ifdef TARGET_X86_64

#define REG (env->regs[8])
#define REGNAME _R8
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG (env->regs[9])
#define REGNAME _R9
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG (env->regs[10])
#define REGNAME _R10
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG (env->regs[11])
#define REGNAME _R11
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG (env->regs[12])
#define REGNAME _R12
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG (env->regs[13])
#define REGNAME _R13
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG (env->regs[14])
#define REGNAME _R14
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG (env->regs[15])
#define REGNAME _R15
#include "opreg_template.h"
#undef REG
#undef REGNAME

#endif

/* operations with flags */

/* update flags with T0 and T1 (add/sub case) */
void OPPROTO op_update2_cc(void)
{
    CC_SRC = T1;
    CC_DST = T0;
}

/* update flags with T0 (logic operation case) */
void OPPROTO op_update1_cc(void)
{
    CC_DST = T0;
}

void OPPROTO op_update_neg_cc(void)
{
    CC_SRC = -T0;
    CC_DST = T0;
}

void OPPROTO op_cmpl_T0_T1_cc(void)
{
    CC_SRC = T1;
    CC_DST = T0 - T1;
}

void OPPROTO op_update_inc_cc(void)
{
    CC_SRC = cc_table[CC_OP].compute_c();
    CC_DST = T0;
}

void OPPROTO op_testl_T0_T1_cc(void)
{
    CC_DST = T0 & T1;
}

/* operations without flags */

void OPPROTO op_addl_T0_T1(void)
{
    T0 += T1;
}

void OPPROTO op_orl_T0_T1(void)
{
    T0 |= T1;
}

void OPPROTO op_andl_T0_T1(void)
{
    T0 &= T1;
}

void OPPROTO op_subl_T0_T1(void)
{
    T0 -= T1;
}

void OPPROTO op_xorl_T0_T1(void)
{
    T0 ^= T1;
}

void OPPROTO op_negl_T0(void)
{
    T0 = -T0;
}

void OPPROTO op_incl_T0(void)
{
    T0++;
}

void OPPROTO op_decl_T0(void)
{
    T0--;
}

void OPPROTO op_notl_T0(void)
{
    T0 = ~T0;
}

void OPPROTO op_bswapl_T0(void)
{
    T0 = bswap32(T0);
}

#ifdef TARGET_X86_64
void OPPROTO op_bswapq_T0(void)
{
    helper_bswapq_T0();
}
#endif

/* multiply/divide */

/* XXX: add eflags optimizations */
/* XXX: add non P4 style flags */

void OPPROTO op_mulb_AL_T0(void)
{
    unsigned int res;
    res = (uint8_t)EAX * (uint8_t)T0;
    EAX = (EAX & ~0xffff) | res;
    CC_DST = res;
    CC_SRC = (res & 0xff00);
}

void OPPROTO op_imulb_AL_T0(void)
{
    int res;
    res = (int8_t)EAX * (int8_t)T0;
    EAX = (EAX & ~0xffff) | (res & 0xffff);
    CC_DST = res;
    CC_SRC = (res != (int8_t)res);
}

void OPPROTO op_mulw_AX_T0(void)
{
    unsigned int res;
    res = (uint16_t)EAX * (uint16_t)T0;
    EAX = (EAX & ~0xffff) | (res & 0xffff);
    EDX = (EDX & ~0xffff) | ((res >> 16) & 0xffff);
    CC_DST = res;
    CC_SRC = res >> 16;
}

void OPPROTO op_imulw_AX_T0(void)
{
    int res;
    res = (int16_t)EAX * (int16_t)T0;
    EAX = (EAX & ~0xffff) | (res & 0xffff);
    EDX = (EDX & ~0xffff) | ((res >> 16) & 0xffff);
    CC_DST = res;
    CC_SRC = (res != (int16_t)res);
}

void OPPROTO op_mull_EAX_T0(void)
{
    uint64_t res;
    res = (uint64_t)((uint32_t)EAX) * (uint64_t)((uint32_t)T0);
    EAX = (uint32_t)res;
    EDX = (uint32_t)(res >> 32);
    CC_DST = (uint32_t)res;
    CC_SRC = (uint32_t)(res >> 32);
}

void OPPROTO op_imull_EAX_T0(void)
{
    int64_t res;
    res = (int64_t)((int32_t)EAX) * (int64_t)((int32_t)T0);
    EAX = (uint32_t)(res);
    EDX = (uint32_t)(res >> 32);
    CC_DST = res;
    CC_SRC = (res != (int32_t)res);
}

void OPPROTO op_imulw_T0_T1(void)
{
    int res;
    res = (int16_t)T0 * (int16_t)T1;
    T0 = res;
    CC_DST = res;
    CC_SRC = (res != (int16_t)res);
}

void OPPROTO op_imull_T0_T1(void)
{
    int64_t res;
    res = (int64_t)((int32_t)T0) * (int64_t)((int32_t)T1);
    T0 = res;
    CC_DST = res;
    CC_SRC = (res != (int32_t)res);
}

#ifdef TARGET_X86_64
void OPPROTO op_mulq_EAX_T0(void)
{
    helper_mulq_EAX_T0();
}

void OPPROTO op_imulq_EAX_T0(void)
{
    helper_imulq_EAX_T0();
}

void OPPROTO op_imulq_T0_T1(void)
{
    helper_imulq_T0_T1();
}
#endif

/* division, flags are undefined */

void OPPROTO op_divb_AL_T0(void)
{
    unsigned int num, den, q, r;

    num = (EAX & 0xffff);
    den = (T0 & 0xff);
    if (den == 0) {
        raise_exception(EXCP00_DIVZ);
    }
    q = (num / den);
    if (q > 0xff)
        raise_exception(EXCP00_DIVZ);
    q &= 0xff;
    r = (num % den) & 0xff;
    EAX = (EAX & ~0xffff) | (r << 8) | q;
}

void OPPROTO op_idivb_AL_T0(void)
{
    int num, den, q, r;

    num = (int16_t)EAX;
    den = (int8_t)T0;
    if (den == 0) {
        raise_exception(EXCP00_DIVZ);
    }
    q = (num / den);
    if (q != (int8_t)q)
        raise_exception(EXCP00_DIVZ);
    q &= 0xff;
    r = (num % den) & 0xff;
    EAX = (EAX & ~0xffff) | (r << 8) | q;
}

void OPPROTO op_divw_AX_T0(void)
{
    unsigned int num, den, q, r;

    num = (EAX & 0xffff) | ((EDX & 0xffff) << 16);
    den = (T0 & 0xffff);
    if (den == 0) {
        raise_exception(EXCP00_DIVZ);
    }
    q = (num / den);
    if (q > 0xffff)
        raise_exception(EXCP00_DIVZ);
    q &= 0xffff;
    r = (num % den) & 0xffff;
    EAX = (EAX & ~0xffff) | q;
    EDX = (EDX & ~0xffff) | r;
}

void OPPROTO op_idivw_AX_T0(void)
{
    int num, den, q, r;

    num = (EAX & 0xffff) | ((EDX & 0xffff) << 16);
    den = (int16_t)T0;
    if (den == 0) {
        raise_exception(EXCP00_DIVZ);
    }
    q = (num / den);
    if (q != (int16_t)q)
        raise_exception(EXCP00_DIVZ);
    q &= 0xffff;
    r = (num % den) & 0xffff;
    EAX = (EAX & ~0xffff) | q;
    EDX = (EDX & ~0xffff) | r;
}

void OPPROTO op_divl_EAX_T0(void)
{
    helper_divl_EAX_T0();
}

void OPPROTO op_idivl_EAX_T0(void)
{
    helper_idivl_EAX_T0();
}

#ifdef TARGET_X86_64
void OPPROTO op_divq_EAX_T0(void)
{
    helper_divq_EAX_T0();
}

void OPPROTO op_idivq_EAX_T0(void)
{
    helper_idivq_EAX_T0();
}
#endif

/* constant load & misc op */

/* XXX: consistent names */
void OPPROTO op_movl_T0_imu(void)
{
    T0 = (uint32_t)PARAM1;
}

void OPPROTO op_movl_T0_im(void)
{
    T0 = (int32_t)PARAM1;
}

void OPPROTO op_addl_T0_im(void)
{
    T0 += PARAM1;
}

void OPPROTO op_andl_T0_ffff(void)
{
    T0 = T0 & 0xffff;
}

void OPPROTO op_andl_T0_im(void)
{
    T0 = T0 & PARAM1;
}

void OPPROTO op_movl_T0_T1(void)
{
    T0 = T1;
}

void OPPROTO op_movl_T1_imu(void)
{
    T1 = (uint32_t)PARAM1;
}

void OPPROTO op_movl_T1_im(void)
{
    T1 = (int32_t)PARAM1;
}

void OPPROTO op_addl_T1_im(void)
{
    T1 += PARAM1;
}

void OPPROTO op_movl_T1_A0(void)
{
    T1 = A0;
}

void OPPROTO op_movl_A0_im(void)
{
    A0 = (uint32_t)PARAM1;
}

void OPPROTO op_addl_A0_im(void)
{
    A0 = (uint32_t)(A0 + PARAM1);
}

void OPPROTO op_movl_A0_seg(void)
{
    A0 = (uint32_t)*(target_ulong *)((char *)env + PARAM1);
}

void OPPROTO op_addl_A0_seg(void)
{
    A0 = (uint32_t)(A0 + *(target_ulong *)((char *)env + PARAM1));
}

void OPPROTO op_addl_A0_AL(void)
{
    A0 = (uint32_t)(A0 + (EAX & 0xff));
}

#ifdef WORDS_BIGENDIAN
typedef union UREG64 {
    struct { uint16_t v3, v2, v1, v0; } w;
    struct { uint32_t v1, v0; } l;
    uint64_t q;
} UREG64;
#else
typedef union UREG64 {
    struct { uint16_t v0, v1, v2, v3; } w;
    struct { uint32_t v0, v1; } l;
    uint64_t q;
} UREG64;
#endif

#ifdef TARGET_X86_64

#define PARAMQ1 \
({\
    UREG64 __p;\
    __p.l.v1 = PARAM1;\
    __p.l.v0 = PARAM2;\
    __p.q;\
}) 

void OPPROTO op_movq_T0_im64(void)
{
    T0 = PARAMQ1;
}

void OPPROTO op_movq_T1_im64(void)
{
    T1 = PARAMQ1;
}

void OPPROTO op_movq_A0_im(void)
{
    A0 = (int32_t)PARAM1;
}

void OPPROTO op_movq_A0_im64(void)
{
    A0 = PARAMQ1;
}

void OPPROTO op_addq_A0_im(void)
{
    A0 = (A0 + (int32_t)PARAM1);
}

void OPPROTO op_addq_A0_im64(void)
{
    A0 = (A0 + PARAMQ1);
}

void OPPROTO op_movq_A0_seg(void)
{
    A0 = *(target_ulong *)((char *)env + PARAM1);
}

void OPPROTO op_addq_A0_seg(void)
{
    A0 += *(target_ulong *)((char *)env + PARAM1);
}

void OPPROTO op_addq_A0_AL(void)
{
    A0 = (A0 + (EAX & 0xff));
}

#endif

void OPPROTO op_andl_A0_ffff(void)
{
    A0 = A0 & 0xffff;
}

/* memory access */

#define MEMSUFFIX _raw
#include "ops_mem.h"

#if !defined(CONFIG_USER_ONLY)
#define MEMSUFFIX _kernel
#include "ops_mem.h"

#define MEMSUFFIX _user
#include "ops_mem.h"
#endif

/* indirect jump */

void OPPROTO op_jmp_T0(void)
{
    EIP = T0;
}

void OPPROTO op_movl_eip_im(void)
{
    EIP = (uint32_t)PARAM1;
}

#ifdef TARGET_X86_64
void OPPROTO op_movq_eip_im(void)
{
    EIP = (int32_t)PARAM1;
}

void OPPROTO op_movq_eip_im64(void)
{
    EIP = PARAMQ1;
}
#endif

void OPPROTO op_hlt(void)
{
    helper_hlt();
}

void OPPROTO op_monitor(void)
{
    helper_monitor();
}

void OPPROTO op_mwait(void)
{
    helper_mwait();
}

void OPPROTO op_debug(void)
{
    env->exception_index = EXCP_DEBUG;
    cpu_loop_exit();
}

void OPPROTO op_raise_interrupt(void)
{
    int intno, next_eip_addend;
    intno = PARAM1;
    next_eip_addend = PARAM2;
    raise_interrupt(intno, 1, 0, next_eip_addend);
}

void OPPROTO op_raise_exception(void)
{
    int exception_index;
    exception_index = PARAM1;
    raise_exception(exception_index);
}

void OPPROTO op_into(void)
{
    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    if (eflags & CC_O) {
        raise_interrupt(EXCP04_INTO, 1, 0, PARAM1);
    }
    FORCE_RET();
}

void OPPROTO op_cli(void)
{
    env->eflags &= ~IF_MASK;
}

void OPPROTO op_sti(void)
{
    env->eflags |= IF_MASK;
}

void OPPROTO op_set_inhibit_irq(void)
{
    env->hflags |= HF_INHIBIT_IRQ_MASK;
}

void OPPROTO op_reset_inhibit_irq(void)
{
    env->hflags &= ~HF_INHIBIT_IRQ_MASK;
}

void OPPROTO op_rsm(void)
{
    helper_rsm();
}

#if 0
/* vm86plus instructions */
void OPPROTO op_cli_vm(void)
{
    env->eflags &= ~VIF_MASK;
}

void OPPROTO op_sti_vm(void)
{
    env->eflags |= VIF_MASK;
    if (env->eflags & VIP_MASK) {
        EIP = PARAM1;
        raise_exception(EXCP0D_GPF);
    }
    FORCE_RET();
}
#endif

void OPPROTO op_boundw(void)
{
    int low, high, v;
    low = ldsw(A0);
    high = ldsw(A0 + 2);
    v = (int16_t)T0;
    if (v < low || v > high) {
        raise_exception(EXCP05_BOUND);
    }
    FORCE_RET();
}

void OPPROTO op_boundl(void)
{
    int low, high, v;
    low = ldl(A0);
    high = ldl(A0 + 4);
    v = T0;
    if (v < low || v > high) {
        raise_exception(EXCP05_BOUND);
    }
    FORCE_RET();
}

void OPPROTO op_cmpxchg8b(void)
{
    helper_cmpxchg8b();
}

void OPPROTO op_movl_T0_0(void)
{
    T0 = 0;
}

void OPPROTO op_exit_tb(void)
{
    EXIT_TB();
}

/* multiple size ops */

#define ldul ldl

#define SHIFT 0
#include "ops_template.h"
#undef SHIFT

#define SHIFT 1
#include "ops_template.h"
#undef SHIFT

#define SHIFT 2
#include "ops_template.h"
#undef SHIFT

#ifdef TARGET_X86_64

#define SHIFT 3
#include "ops_template.h"
#undef SHIFT

#endif

/* sign extend */

void OPPROTO op_movsbl_T0_T0(void)
{
    T0 = (int8_t)T0;
}

void OPPROTO op_movzbl_T0_T0(void)
{
    T0 = (uint8_t)T0;
}

void OPPROTO op_movswl_T0_T0(void)
{
    T0 = (int16_t)T0;
}

void OPPROTO op_movzwl_T0_T0(void)
{
    T0 = (uint16_t)T0;
}

void OPPROTO op_movswl_EAX_AX(void)
{
    EAX = (uint32_t)((int16_t)EAX);
}

#ifdef TARGET_X86_64
void OPPROTO op_movslq_T0_T0(void)
{
    T0 = (int32_t)T0;
}

void OPPROTO op_movslq_RAX_EAX(void)
{
    EAX = (int32_t)EAX;
}
#endif

void OPPROTO op_movsbw_AX_AL(void)
{
    EAX = (EAX & ~0xffff) | ((int8_t)EAX & 0xffff);
}

void OPPROTO op_movslq_EDX_EAX(void)
{
    EDX = (uint32_t)((int32_t)EAX >> 31);
}

void OPPROTO op_movswl_DX_AX(void)
{