/*
?*?libdasm?--?simple?x86?disassembly?library
?*?（c）?2004?-?2006??jt?/?nologin.org
?*
?*?libdasm.c:
?*?This?file?contains?most?code?of?libdasm.?Check?out
?*?libdasm.h?for?function?definitions.
?*
?*/

#include?
#include?
#include?“libdasm.h“
#include?“opcode_tables.h“


//?Endianess?conversion?routines?（thanks?Ero）

__inline__?BYTE?FETCH8（BYTE?*addr）?{
	//?So?far?byte?cast?seems?to?work?on?all?tested?platforms
	return?*（BYTE?*）addr;	
}

__inline__?WORD?FETCH16（BYTE?*addr）?{
#if?defined?__X86__
	//?Direct?cast?only?for?x86
	return?*（WORD?*）addr;
#else
	//?Revert?to?memcpy
	WORD?val;
	memcpy（&val?addr?2）;
#if?defined?__LITTLE_ENDIAN__
	return?val;
#else
	return??（（val?&?0xff00）?>>?8）?|
		（（val?&?0x00ff）?<
#endif?//?__LITTLE_ENDIAN__
#endif?//?__X86__
}

__inline__?DWORD?FETCH32（BYTE?*addr）?{
#if?defined?__X86__
	return?*（DWORD?*）addr;	
#else
	DWORD?val;
	memcpy（&val?addr?4）;
#if?defined?__LITTLE_ENDIAN__
	return?val;
#else
	return??（（val?&?（0xff000000））?>>?24）?|
		（（val?&?（0x00ff0000））?>>?8）??|
		（（val?&?（0x0000ff00））?<		（（val?&?（0x000000ff））?<
#endif?//?__LITTLE_ENDIAN__
#endif?//?__X86__
}

//?Check?for?address/operand?size?override

__inline__?enum?Mode?MODE_CHECK_ADDR（enum?Mode?mode?int?flags）?{
	if?（（（mode?==?MODE_32）?&&?（MASK_PREFIX_ADDR（flags）?==?0））?||
????	????（（mode?==?MODE_16）?&&?（MASK_PREFIX_ADDR（flags）?==?1）））
		return?MODE_32;
	else?
		return?MODE_16;
}
__inline__?enum?Mode?MODE_CHECK_OPERAND（enum?Mode?mode?int?flags）?{
	if?（（（mode?==?MODE_32）?&&?（MASK_PREFIX_OPERAND（flags）?==?0））?||
????	????（（mode?==?MODE_16）?&&?（MASK_PREFIX_OPERAND（flags）?==?1）））
		return?MODE_32;
	else?
		return?MODE_16;
}


//?Parse?2?and?3-byte?opcodes

int?get_real_instruction2（BYTE?*addr?int?*flags）?{
	switch?（*addr）?{

		//?opcode?extensions?for?2-byte?opcodes
		case?0x00:
			//?Clear?extension
			*flags?&=?0xffffff00;
			*flags?|=?EXT_G6;
			break;
		case?0x01:
			*flags?&=?0xffffff00;
			*flags?|=?EXT_G7;
			break;
		case?0x71:
			*flags?&=?0xffffff00;
			*flags?|=?EXT_GC;
			break;
		case?0x72:
			*flags?&=?0xffffff00;
			*flags?|=?EXT_GD;
			break;
		case?0x73:
			*flags?&=?0xffffff00;
			*flags?|=?EXT_GE;
			break;
		case?0xae:
			*flags?&=?0xffffff00;
			*flags?|=?EXT_GF;
			break;
		case?0xba:
			*flags?&=?0xffffff00;
			*flags?|=?EXT_G8;
			break;
		case?0xc7:
			*flags?&=?0xffffff00;
			*flags?|=?EXT_G9;
			break;
		default:
			break;
	}
	return?0;
}

//?Parse?instruction?flags?get?opcode?index

int?get_real_instruction（BYTE?*addr?int?*index?int?*flags）?{
	switch?（*addr）?{

		//?2-byte?opcode
		case?0x0f:
			*index?+=?1;
			*flags?|=?EXT_T2;
			break;

		//?Prefix?group?2
		case?0x2e:
			*index?+=?1;
			//?Clear?previous?flags?from?same?group?（undefined?effect）
			*flags?&=?0xff00ffff;
			*flags?|=?PREFIX_CS_OVERRIDE;
			get_real_instruction（addr?+?1?index?flags）;
			break;
		case?0x36:
			*index?+=?1;
			*flags?&=?0xff00ffff;
			*flags?|=?PREFIX_SS_OVERRIDE;
			get_real_instruction（addr?+?1?ind

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2010-02-25?22:39??examples\
?????文件????????3890??2009-05-08?05:50??examples\das.c
?????文件?????????284??2009-05-08?05:50??examples\Makefile
?????文件?????????413??2009-05-08?05:50??examples\README.txt
?????文件?????????753??2009-05-08?05:50??examples\simple.c
?????文件?????????130??2009-05-16?18:58??examples\test32.bin
?????目錄???????????0??2010-02-25?22:39??pydasm\
?????文件????????2567??2010-02-25?22:33??pydasm\das.py
?????文件???????22002??2010-02-14?22:20??pydasm\pydasm.c
?????文件????????1529??2009-05-08?05:50??pydasm\README.txt
?????文件?????????481??2009-05-08?05:50??pydasm\setup.py
?????目錄???????????0??2010-02-25?22:39??rbdasm\
?????文件???????27732??2009-05-08?05:50??rbdasm\dasm.c
?????文件????????2190??2009-05-08?05:50??rbdasm\dasm.rb.ut.rb
?????文件??????????39??2009-05-08?05:50??rbdasm\extconf.rb
?????文件????????2970??2009-05-08?05:50??rbdasm\Makefile
?????文件????????5882??2010-02-25?22:33??HISTORY.txt
?????文件??????293234??2009-05-17?11:03??opcode_tables.h
?????文件?????????785??2009-05-08?05:50??LIB.txt
?????文件???????31201??2009-05-08?05:50??libdasm.c
?????文件?????????344??2009-05-08?05:50??libdasm.def
?????文件???????17199??2009-05-08?05:50??libdasm.h
?????文件?????????605??2009-05-08?05:50??Makefile
?????文件?????????183??2009-05-08?05:50??Makefile.msvc
?????文件???????14460??2009-05-08?05:50??README.txt
?????文件?????????161??2009-05-08?05:50??TODO.txt