ops.c

u-boot1.3.0的原码,从配了网络驱动和FLASH的驱动,并该用ESC竟如

REMARKS:
Handles opcode 0x0e
****************************************************************************/
void x86emuOp_push_CS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("PUSH\tCS\n");
    TRACE_AND_STEP();
    push_word(M.x86.R_CS);
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x0f. Escape for two-byte opcode (286 or better)
****************************************************************************/
void x86emuOp_two_byte(u8 X86EMU_UNUSED(op1))
{
    u8 op2 = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
    INC_DECODED_INST_LEN(1);
    (*x86emu_optab2[op2])(op2);
}

/****************************************************************************
REMARKS:
Handles opcode 0x16
****************************************************************************/
void x86emuOp_push_SS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("PUSH\tSS\n");
    TRACE_AND_STEP();
    push_word(M.x86.R_SS);
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x17
****************************************************************************/
void x86emuOp_pop_SS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("POP\tSS\n");
    TRACE_AND_STEP();
    M.x86.R_SS = pop_word();
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x1e
****************************************************************************/
void x86emuOp_push_DS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("PUSH\tDS\n");
    TRACE_AND_STEP();
    push_word(M.x86.R_DS);
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x1f
****************************************************************************/
void x86emuOp_pop_DS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("POP\tDS\n");
    TRACE_AND_STEP();
    M.x86.R_DS = pop_word();
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x26
****************************************************************************/
void x86emuOp_segovr_ES(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("ES:\n");
    TRACE_AND_STEP();
    M.x86.mode |= SYSMODE_SEGOVR_ES;
    /*
     * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
     * opcode subroutines we do not want to do this.
     */
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x27
****************************************************************************/
void x86emuOp_daa(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("DAA\n");
    TRACE_AND_STEP();
    M.x86.R_AL = daa_byte(M.x86.R_AL);
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x2e
****************************************************************************/
void x86emuOp_segovr_CS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("CS:\n");
    TRACE_AND_STEP();
    M.x86.mode |= SYSMODE_SEGOVR_CS;
    /* note no DECODE_CLEAR_SEGOVR here. */
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x2f
****************************************************************************/
void x86emuOp_das(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("DAS\n");
    TRACE_AND_STEP();
    M.x86.R_AL = das_byte(M.x86.R_AL);
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x36
****************************************************************************/
void x86emuOp_segovr_SS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("SS:\n");
    TRACE_AND_STEP();
    M.x86.mode |= SYSMODE_SEGOVR_SS;
    /* no DECODE_CLEAR_SEGOVR ! */
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x37
****************************************************************************/
void x86emuOp_aaa(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("AAA\n");
    TRACE_AND_STEP();
    M.x86.R_AX = aaa_word(M.x86.R_AX);
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x3e
****************************************************************************/
void x86emuOp_segovr_DS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("DS:\n");
    TRACE_AND_STEP();
    M.x86.mode |= SYSMODE_SEGOVR_DS;
    /* NO DECODE_CLEAR_SEGOVR! */
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x3f
****************************************************************************/
void x86emuOp_aas(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("AAS\n");
    TRACE_AND_STEP();
    M.x86.R_AX = aas_word(M.x86.R_AX);
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x40 - 0x47
****************************************************************************/
void x86emuOp_inc_register(u8 op1)
{
    START_OF_INSTR();
    op1 &= 0x7;
    DECODE_PRINTF("INC\t");
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	u32 *reg;
	reg = DECODE_RM_LONG_REGISTER(op1);
	DECODE_PRINTF("\n");
	TRACE_AND_STEP();
	*reg = inc_long(*reg);
    } else {
	u16 *reg;
	reg = DECODE_RM_WORD_REGISTER(op1);
	DECODE_PRINTF("\n");
	TRACE_AND_STEP();
	*reg = inc_word(*reg);
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x48 - 0x4F
****************************************************************************/
void x86emuOp_dec_register(u8 op1)
{
    START_OF_INSTR();
    op1 &= 0x7;
    DECODE_PRINTF("DEC\t");
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	u32 *reg;
	reg = DECODE_RM_LONG_REGISTER(op1);
	DECODE_PRINTF("\n");
	TRACE_AND_STEP();
	*reg = dec_long(*reg);
    } else {
	u16 *reg;
	reg = DECODE_RM_WORD_REGISTER(op1);
	DECODE_PRINTF("\n");
	TRACE_AND_STEP();
	*reg = dec_word(*reg);
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x50 - 0x57
****************************************************************************/
void x86emuOp_push_register(u8 op1)
{
    START_OF_INSTR();
    op1 &= 0x7;
    DECODE_PRINTF("PUSH\t");
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	u32 *reg;
	reg = DECODE_RM_LONG_REGISTER(op1);
	DECODE_PRINTF("\n");
	TRACE_AND_STEP();
	push_long(*reg);
    } else {
	u16 *reg;
	reg = DECODE_RM_WORD_REGISTER(op1);
	DECODE_PRINTF("\n");
	TRACE_AND_STEP();
	push_word(*reg);
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x58 - 0x5F
****************************************************************************/
void x86emuOp_pop_register(u8 op1)
{
    START_OF_INSTR();
    op1 &= 0x7;
    DECODE_PRINTF("POP\t");
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	u32 *reg;
	reg = DECODE_RM_LONG_REGISTER(op1);
	DECODE_PRINTF("\n");
	TRACE_AND_STEP();
	*reg = pop_long();
    } else {
	u16 *reg;
	reg = DECODE_RM_WORD_REGISTER(op1);
	DECODE_PRINTF("\n");
	TRACE_AND_STEP();
	*reg = pop_word();
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x60
****************************************************************************/
void x86emuOp_push_all(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	DECODE_PRINTF("PUSHAD\n");
    } else {
	DECODE_PRINTF("PUSHA\n");
    }
    TRACE_AND_STEP();
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	u32 old_sp = M.x86.R_ESP;

	push_long(M.x86.R_EAX);
	push_long(M.x86.R_ECX);
	push_long(M.x86.R_EDX);
	push_long(M.x86.R_EBX);
	push_long(old_sp);
	push_long(M.x86.R_EBP);
	push_long(M.x86.R_ESI);
	push_long(M.x86.R_EDI);
    } else {
	u16 old_sp = M.x86.R_SP;

	push_word(M.x86.R_AX);
	push_word(M.x86.R_CX);
	push_word(M.x86.R_DX);
	push_word(M.x86.R_BX);
	push_word(old_sp);
	push_word(M.x86.R_BP);
	push_word(M.x86.R_SI);
	push_word(M.x86.R_DI);
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x61
****************************************************************************/
void x86emuOp_pop_all(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	DECODE_PRINTF("POPAD\n");
    } else {
	DECODE_PRINTF("POPA\n");
    }
    TRACE_AND_STEP();
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	M.x86.R_EDI = pop_long();
	M.x86.R_ESI = pop_long();
	M.x86.R_EBP = pop_long();
	M.x86.R_ESP += 4;	       /* skip ESP */
	M.x86.R_EBX = pop_long();
	M.x86.R_EDX = pop_long();
	M.x86.R_ECX = pop_long();
	M.x86.R_EAX = pop_long();
    } else {
	M.x86.R_DI = pop_word();
	M.x86.R_SI = pop_word();
	M.x86.R_BP = pop_word();
	M.x86.R_SP += 2;	       /* skip SP */
	M.x86.R_BX = pop_word();
	M.x86.R_DX = pop_word();
	M.x86.R_CX = pop_word();
	M.x86.R_AX = pop_word();
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/*opcode 0x62	ILLEGAL OP, calls x86emuOp_illegal_op() */
/*opcode 0x63	ILLEGAL OP, calls x86emuOp_illegal_op() */

/****************************************************************************
REMARKS:
Handles opcode 0x64
****************************************************************************/
void x86emuOp_segovr_FS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("FS:\n");
    TRACE_AND_STEP();
    M.x86.mode |= SYSMODE_SEGOVR_FS;
    /*
     * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
     * opcode subroutines we do not want to do this.
     */
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x65
****************************************************************************/
void x86emuOp_segovr_GS(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("GS:\n");
    TRACE_AND_STEP();
    M.x86.mode |= SYSMODE_SEGOVR_GS;
    /*
     * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
     * opcode subroutines we do not want to do this.
     */
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x66 - prefix for 32-bit register
****************************************************************************/
void x86emuOp_prefix_data(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("DATA:\n");
    TRACE_AND_STEP();
    M.x86.mode |= SYSMODE_PREFIX_DATA;
    /* note no DECODE_CLEAR_SEGOVR here. */
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x67 - prefix for 32-bit address
****************************************************************************/
void x86emuOp_prefix_addr(u8 X86EMU_UNUSED(op1))
{
    START_OF_INSTR();
    DECODE_PRINTF("ADDR:\n");
    TRACE_AND_STEP();
    M.x86.mode |= SYSMODE_PREFIX_ADDR;
    /* note no DECODE_CLEAR_SEGOVR here. */
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x68
****************************************************************************/
void x86emuOp_push_word_IMM(u8 X86EMU_UNUSED(op1))
{
    u32 imm;

    START_OF_INSTR();
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	imm = fetch_long_imm();
    } else {
	imm = fetch_word_imm();
    }
    DECODE_PRINTF2("PUSH\t%x\n", imm);
    TRACE_AND_STEP();
    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	push_long(imm);
    } else {
	push_word((u16)imm);
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x69
****************************************************************************/
void x86emuOp_imul_word_IMM(u8 X86EMU_UNUSED(op1))
{
    int mod, rl, rh;
    uint srcoffset;

    START_OF_INSTR();
    DECODE_PRINTF("IMUL\t");
    FETCH_DECODE_MODRM(mod, rh, rl);
    if (mod < 3) {
	srcoffset = decode_rmXX_address(mod, rl);
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 *destreg;
	    u32 srcval;
	    u32 res_lo,res_hi;
	    s32 imm;