TCODE static void uprintf(char* buffer)
{
/*
uputchar('.');
char buffer[100];
va_list arg;
va_start(arg, fmt);
//vsnprintf(buffer, 511, fmt, arg);
vsnprintf(buffer, 99, fmt, arg);
va_end(arg);
*/
int i;
int len = strlen(buffer);
for (i = 0; i < len; i++) {
uputchar( *(((char*)buffer) + i));
}
}
static void ua_str(char *s)
{ char ch;
if(s == (char *) NULL) {
uprintf("<invalid>");
} else {
while((ch = *s++) != 0) {
if(ch == '%') {
ch = *s++;
percent(ch, *s++);
} else {
if(ch == ' ') ch = '\t';
if(ch == '@') ch = ' ';
uputchar(ch);
}
}
}
}
static void ua_str(char *str)
{ char c,c1;
if ( !str ) {
uprintf("<invalid>");
return;
}
if ( strpbrk( str,"CDFGRST" ) ) // specifiers for registers=>no size 2b specified
must_do_size = 0;
while( (c = *str++) != 0 )
if (c == '%') {
c = *str++;
if ( c )
c1 = *str++;
else
c1 = 0;
percent(c, c1);
if ( !c1 ) break;
} else
uputchar(c);
}
/* Main table driver */
static void percent( char type, char subtype )
{
DWORD vofs;
int extend = (addrsize == 32) ? 4 : 2;
BYTE c;
switch (type) {
case 'A': /* direct address */
SET_FLAG( Info->CurrentFlags,DISASM_FL_CODE );
outhex(subtype, extend, 0, addrsize, 0);
CLR_FLAG( Info->CurrentFlags,DISASM_FL_CODE );
break;
case 'C': /* reg(r/m) picks control reg */
uprintf("C%d", REG(modrm()));
must_do_size = 0;
break;
case 'D': /* reg(r/m) picks debug reg */
uprintf("D%d", REG(modrm()));
must_do_size = 0;
break;
case 'E': /* r/m picks operand */
do_modrm(subtype);
break;
case 'G': /* reg(r/m) picks register */
if (subtype == 'F') /* 80*87 operand? */
reg_name(RM(modrm()), subtype);
else
reg_name(REG(modrm()), subtype);
must_do_size = 0;
break;
case 'I': /* immed data */
SET_FLAG( Info->CurrentFlags,DISASM_FL_DATA );
outhex(subtype, 0, 0, opsize, 0);
CLR_FLAG( Info->CurrentFlags,DISASM_FL_DATA );
break;
case 'J': /* relative IP offset */
vofs = 0;
switch(bytes(subtype)) { /* sizeof offset value */
case 1:
vofs = (DWORD)getbyte();
break;
case 2:
vofs = (DWORD)getbyte();
vofs |= (DWORD)getbyte() << 8;
vofs &= 0xFFFFu;
break;
case 4:
vofs = (DWORD)getbyte(); /* yuk! */
vofs |= (DWORD)getbyte() << 8;
vofs |= (DWORD)getbyte() << 16;
vofs |= (DWORD)getbyte() << 24;
break;
}
SET_FLAG( Info->CurrentFlags,DISASM_FL_CODE|DISASM_FL_OFFSET );
uprintf("%s", addr_to_hex(vofs + Info->instruction_length,1,bytes(subtype)) );
CLR_FLAG( Info->CurrentFlags,DISASM_FL_CODE|DISASM_FL_OFFSET );
break;
case 'K': if (do_distance==0)
break;
switch (subtype) {
case 'f': uprintf( Info->GetStringName(DISASM_ID_FAR) ); uputchar(' '); break;
case 'n': uprintf( Info->GetStringName(DISASM_ID_NEAR) ); uputchar(' '); break;
case 's': uprintf( Info->GetStringName(DISASM_ID_SHORT) ); uputchar(' '); break;
}
break;
case 'M': /* r/m picks memory */
do_modrm(subtype);
break;
case 'O': /* offset only */
ua_str("%p:[");
SET_FLAG( Info->CurrentFlags,DISASM_FL_REF );
outhex(subtype, extend, 0, addrsize, 0);
CLR_FLAG( Info->CurrentFlags,DISASM_FL_REF );
uputchar(']');
break;
case 'P': /* prefix byte (rh) */
ua_str("%p:");
break;
case 'R': /* mod(r/m) picks register */
reg_name(REG(modrm()), subtype); /* rh */
must_do_size = 0;
break;
case 'S': /* reg(r/m) picks segment reg */
uputchar("ecsdfg"[REG(modrm())]);
uputchar('s');
must_do_size = 0;
break;
case 'T': /* reg(r/m) picks T reg */
uprintf("tr%d", REG(modrm()));
must_do_size = 0;
break;
case 'X': /* ds:si type operator */
uprintf("ds:[");
if (addrsize == 32)
uputchar('e');
uprintf("si]");
break;
case 'Y': /* es:di type operator */
uprintf("es:[");
if (addrsize == 32)
uputchar('e');
uprintf("di]");
break;
case '2': /* old [pop cs]! now indexes */
ua_str(second[getbyte()]); /* instructions in 386/486 */
break;
case 'g': /* modrm group `subtype' (0--7) */
ua_str( GetOPGroup(subtype) );
break;
case 'd': /* sizeof operand==dword? */
if (opsize == 32)
uputchar('d');
uputchar(subtype);
break;
case 'w': /* insert explicit size specifier */
if (opsize == 32)
uputchar('d');
else
uputchar('w');
uputchar(subtype);
break;
case 'e': /* extended reg name */
if (opsize == 32) {
if (subtype == 'w')
uputchar('d');
else {
uputchar('e');
uputchar(subtype);
}
} else
uputchar(subtype);
break;
case 'f': /* '87 opcode */
floating_point(subtype-'0');
break;
case 'j':
if (addrsize==32 || opsize==32) /* both of them?! */
uputchar('e');
break;
case 'p': /* prefix byte */
switch (subtype) {
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 's':
prefix = subtype;
c = getbyte();
wordop = c & 1;
ua_str( GetOP(c) );
break;
case ':':
if (prefix)
uprintf("%cs:", prefix);
break;
case ' ':
c = getbyte();
wordop = c & 1;
ua_str( GetOP(c) );
break;
}
break;
case 's': /* size override */
switch (subtype) {
case 'a':
addrsize = 48 - addrsize;
c = getbyte();
wordop = c & 1;
ua_str( GetOP(c) );
break;
case 'o':
opsize = 48 - opsize;
c = getbyte();
wordop = c & 1;
ua_str( GetOP(c) );
break;
}
break;
}
}
/*------------------------------------------------------------------------*/
static void do_modrm(char subtype)
{
int mod = MOD(modrm());
int rm = RM(modrm());
int extend = (addrsize == 32) ? 4 : 2;
/* specifies two registers */
if (mod == 3) {
reg_name(rm, subtype);
return;
}
if (must_do_size) {
if (wordop) {
if (addrsize==32 || opsize==32) /* then must specify size */
uprintf( Info->GetStringName(DISASM_ID_DWORD_PTR) );
else
uprintf( Info->GetStringName(DISASM_ID_WORD_PTR) );
} else
uprintf( Info->GetStringName(DISASM_ID_BYTE_PTR) );
uputchar(' ');
}
/* mem operand with 32 bit ofs */
if ((mod == 0) && (rm == 5) && (addrsize == 32)) {
ua_str("%p:[");
SET_FLAG( Info->CurrentFlags,DISASM_FL_REF );
outhex('d', extend, 0, addrsize, 0);
CLR_FLAG( Info->CurrentFlags,DISASM_FL_REF );
uputchar(']');
} else
/* 16 bit dsplcmnt */
if ((mod == 0) && (rm == 6) && (addrsize == 16)) {
ua_str("%p:[");
SET_FLAG( Info->CurrentFlags,DISASM_FL_REF );
outhex('w', extend, 0, addrsize, 0);
CLR_FLAG( Info->CurrentFlags,DISASM_FL_REF );
uputchar(']');
} else {
/*All other*/
if ( (addrsize != 32) || (rm != 4) )
ua_str("%p:[");
SET_FLAG( Info->CurrentFlags,DISASM_FL_REF | DISASM_FL_REFADD );
if (addrsize == 16)
switch (rm) {
case 0: uprintf("bx+si"); break;
case 1: uprintf("bx+di"); break;
case 2: uprintf("bp+si"); break;
case 3: uprintf("bp+di"); break;
case 4: uprintf("si"); break;
case 5: uprintf("di"); break;
case 6: uprintf("bp"); break;
case 7: uprintf("bx"); break;
}
else
switch (rm) {
case 0: uprintf("eax"); break;
case 1: uprintf("ecx"); break;
case 2: uprintf("edx"); break;
case 3: uprintf("ebx"); break;
case 4: do_sib(mod); break;
case 5: uprintf("ebp"); break;
case 6: uprintf("esi"); break;
case 7: uprintf("edi"); break;
}
switch (mod) {
case 1: outhex('b', extend, 1, addrsize, 0); break;
case 2: outhex('v', extend, 1, addrsize, 1); break;
}
CLR_FLAG( Info->CurrentFlags,DISASM_FL_REF | DISASM_FL_REFADD );
uputchar(']');
}
}
static void percent(char type, char subtype)
{ unsigned int vofs = 0;
char *name;
int extend = (addrsize == 32) ? 4 : 2;
unsigned char c;
switch(type) {
case 'A': /* Direct address */
outhex(subtype, extend, 0, addrsize, 0);
break;
case 'C': /* reg(r/m) picks control reg */
uprintf("CR%d", REG(modrm()));
must_do_size = 0;
break;
case 'D': /* reg(r/m) picks debug reg */
uprintf("DR%d", REG(modrm()));
must_do_size = 0;
break;
case 'E': /* r/m picks operand */
do_modrm(subtype);
break;
case 'G': /* reg(r/m) picks register */
if(subtype == 'f')
reg_name(RM(modrm()), subtype);
else
reg_name(REG(modrm()), subtype);
must_do_size = 0;
break;
case 'I': /* Immediate data */
outhex(subtype, 0, 0, opsize, 0);
break;
case 'J': /* Relative IP offset */
switch(bytes(subtype)) {/* Size of offset value */
case 1:
vofs = (unsigned int) (signed char) getbyte();
break;
case 2:
vofs = getbyte();
vofs += getbyte() << 8;
vofs = (unsigned int) (signed short) vofs;
break;
case 4:
vofs = (unsigned int) getbyte();
vofs |= (unsigned int) getbyte() << 8;
vofs |= (unsigned int) getbyte() << 16;
vofs |= (unsigned int) getbyte() << 24;
break;
}
name = addr_to_hex((int) (vofs + inst_offset));
uprintf("%s", name);
break;
case 'K':
switch(subtype) {
case 'f':
ua_str("FAR@");
break;
case 'n':
ua_str("NEAR@");
break;
case 's':
ua_str("SHORT@");
break;
}
break;
case 'M': /* r/m picks memory */
do_modrm(subtype);
break;
case 'O': /* Offset only */
ua_str("%p:[");
outhex(subtype, extend, 0, addrsize, 0);
uputchar(']');
break;
case 'P': /* Prefix byte */
ua_str("%p:");
break;
case 'R': /* mod(r/m) picks register */
reg_name(REG(modrm()), subtype);
must_do_size = 0;
break;
case 'S': /* reg(r/m) picks segment register */
uputchar("ECSDFG"[REG(modrm())]);
uputchar('S');
must_do_size = 0;
break;
case 'T': /* reg(r/m) picks T reg */
uprintf("TR%d", REG(modrm()));
must_do_size = 0;
break;
case 'X': /* DS:SI type operator */
uprintf("DS:[");
if(addrsize == 32) uputchar('E');
uprintf("SI]");
break;
case 'Y': /* ES:DI type operator */
uprintf("ES:[");
if(addrsize == 32) uputchar('E');
uprintf("DI]");
break;
case '2': /* Extended decode with second byte */
ua_str(second[getbyte()]);
break;
case 'g': /* modrm group 'subtype' (0--7) */
ua_str(groups[subtype-'0'][REG(modrm())]);
break;
case 'd': /* Size of operand == dword? */
if(opsize == 32) uputchar('D');
uputchar(subtype);/* No real subtype; following char */
break;
case 'w': /* Insert explicit size specifier */
if(opsize == 32) uputchar('D');
else uputchar('W');
uputchar(subtype);/* No real subtype; following char */
break;
case 'e': /* Extended reg name */
if(opsize == 32) {
if(subtype == 'w') uputchar('D');
else {
uputchar('E');
uputchar(subtype);
}
} else uputchar(subtype);
break;
case 'f': /* 80x87 opcode */
floating_point(subtype-'0');
break;
case 'j':
if(addrsize == 32 || opsize == 32) /* both of them?! */
uputchar('E');
break;
case 'p': /* Prefix byte */
switch(subtype) {
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
case 'S':
prefix = subtype;
c = getbyte();
wordop = c & 1;
ua_str(opmap1[c]);
break;
case ':':
if(prefix) uprintf("%cS:", prefix);
break;
case ' ':
c = getbyte();
wordop = c & 1;
ua_str(opmap1[c]);
break;
}
break;
case 's': /* Size override */
switch(subtype) {
case 'a':
addrsize = 48 - addrsize;
c = getbyte();
wordop = c & 1;
ua_str(opmap1[c]);
/* ua_str(opmap1[getbyte()]); */
break;
case 'o':
opsize = 48 - opsize;
c = getbyte();
wordop = c & 1;
ua_str(opmap1[c]);
/* ua_str(opmap1[getbyte()]); */
break;
}
break;
}
}
static void do_modrm(char subtype)
{ int mod = MOD(modrm());
int rm = RM(modrm());
int extend = (addrsize == 32) ? 4 : 2;
if(mod == 3) { /* Specifies two registers */
reg_name(rm, subtype);
return;
}
if(must_do_size) {
if(wordop) {
if(addrsize == 32 || opsize == 32)
ua_str("DWORD@PTR@");
else
ua_str("WORD@PTR@");
} else ua_str("BYTE@PTR@");
}
if((mod == 0) && (rm == 5) && (addrsize == 32)) {
/* Mem operand with 32 bit offset */
ua_str("%p:[");
outhex('d', extend, 0, addrsize, 0);
uputchar(']');
return;
}
if((mod == 0) && (rm == 6) && (addrsize == 16)) {
/* 16 bit displacement */
ua_str("%p:[");
outhex('w', extend, 0, addrsize, 0);
uputchar(']');
return;
}
if((addrsize != 32) || (rm != 4)) ua_str("%p:[");
if(addrsize == 16) {
switch(rm) {
case 0: uprintf("BX+SI"); break;
case 1: uprintf("BX+DI"); break;
case 2: uprintf("BP+SI"); break;
case 3: uprintf("BP+DI"); break;
case 4: uprintf("SI"); break;
case 5: uprintf("DI"); break;
case 6: uprintf("BP"); break;
case 7: uprintf("BX"); break;
}
} else {
switch(rm) {
case 0: uprintf("EAX"); break;
case 1: uprintf("ECX"); break;
case 2: uprintf("EDX"); break;
case 3: uprintf("EBX"); break;
case 4: do_sib(mod); break;
case 5: uprintf("EBP"); break;
case 6: uprintf("ESI"); break;
case 7: uprintf("EDI"); break;
}
}
switch(mod) {
case 1:
outhex('b', extend, 1, addrsize, 0);
break;
case 2:
outhex('v', extend, 1, addrsize, 1);
break;
}
uputchar(']');
}
void uputs(char *buf)
{
_uputs(buf);
uputchar('\r');
uputchar('\n');
}
/* Main table driver */
static void percent(char type, char subtype)
{
int32 vofs;
char *name;
int extend = (addrsize == 32) ? 4 : 2;
char c;
switch (type) {
case 'A': /* direct address */
outhex(subtype, extend, 0, addrsize, 0);
break;
case 'C': /* reg(r/m) picks control reg */
uprintf("C%d", REG(modrm()));
must_do_size = 0;
break;
case 'D': /* reg(r/m) picks debug reg */
uprintf("D%d", REG(modrm()));
must_do_size = 0;
break;
case 'E': /* r/m picks operand */
do_modrm(subtype);
break;
case 'G': /* reg(r/m) picks register */
if (subtype == 'F') /* 80*87 operand? */
reg_name(RM(modrm()), subtype);
else
reg_name(REG(modrm()), subtype);
must_do_size = 0;
break;
case 'I': /* immed data */
outhex(subtype, 0, 0, opsize, 0);
break;
case 'J': /* relative IP offset */
switch(bytes(subtype)) { /* sizeof offset value */
case 1:
vofs = (int8)getbyte();
break;
case 2:
vofs = getbyte();
vofs += getbyte()<<8;
vofs = (int16)vofs;
break;
case 4:
vofs = (word32)getbyte(); /* yuk! */
vofs |= (word32)getbyte() << 8;
vofs |= (word32)getbyte() << 16;
vofs |= (word32)getbyte() << 24;
break;
}
name = addr_to_hex(vofs+instruction_offset,1);
uprintf("%s", name);
break;
case 'K':
if (do_distance==0)
break;
switch (subtype) {
case 'f':
ua_str("far ");
break;
case 'n':
ua_str("near ");
break;
case 's':
ua_str("short ");
break;
}
break;
case 'M': /* r/m picks memory */
do_modrm(subtype);
break;
case 'O': /* offset only */
ua_str("%p:[");
outhex(subtype, extend, 0, addrsize, 0);
uputchar(']');
break;
case 'P': /* prefix byte (rh) */
ua_str("%p:");
break;
case 'R': /* mod(r/m) picks register */
reg_name(REG(modrm()), subtype); /* rh */
must_do_size = 0;
break;
case 'S': /* reg(r/m) picks segment reg */
uputchar("ecsdfg"[REG(modrm())]);
uputchar('s');
must_do_size = 0;
break;
case 'T': /* reg(r/m) picks T reg */
uprintf("tr%d", REG(modrm()));
must_do_size = 0;
break;
case 'X': /* ds:si type operator */
uprintf("ds:[");
if (addrsize == 32)
uputchar('e');
uprintf("si]");
break;
case 'Y': /* es:di type operator */
uprintf("es:[");
if (addrsize == 32)
uputchar('e');
uprintf("di]");
break;
case '2': /* old [pop cs]! now indexes */
ua_str(second[getbyte()]); /* instructions in 386/486 */
break;
case 'g': /* modrm group `subtype' (0--7) */
ua_str(groups[subtype-'0'][REG(modrm())]);
break;
case 'd': /* sizeof operand==dword? */
if (opsize == 32)
uputchar('d');
uputchar(subtype);
break;
case 'w': /* insert explicit size specifier */
if (opsize == 32)
uputchar('d');
else
uputchar('w');
uputchar(subtype);
break;
case 'e': /* extended reg name */
if (opsize == 32) {
if (subtype == 'w')
uputchar('d');
else {
uputchar('e');
uputchar(subtype);
}
} else
uputchar(subtype);
break;
case 'f': /* '87 opcode */
floating_point(subtype-'0');
break;
case 'j':
if (addrsize==32 || opsize==32) /* both of them?! */
uputchar('e');
break;
case 'p': /* prefix byte */
switch (subtype) {
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 's':
prefix = subtype;
c = getbyte();
wordop = c & 1;
ua_str(opmap1[(unsigned char)c]);
break;
case ':':
if (prefix)
uprintf("%cs:", prefix);
break;
case ' ':
c = getbyte();
wordop = c & 1;
ua_str(opmap1[(unsigned char)c]);
break;
}
break;
case 's': /* size override */
switch (subtype) {
case 'a':
addrsize = 48 - addrsize;
c = getbyte();
wordop = c & 1;
ua_str(opmap1[(unsigned char)c]);
/* ua_str(opmap1[getbyte()]); */
break;
case 'o':
opsize = 48 - opsize;
c = getbyte();
wordop = c & 1;
ua_str(opmap1[(unsigned char)c]);
/* ua_str(opmap1[getbyte()]); */
break;
}
break;
}
}
/*------------------------------------------------------------------------*/
static void do_modrm(char subtype)
{
int mod = MOD(modrm());
int rm = RM(modrm());
int extend = (addrsize == 32) ? 4 : 2;
if (mod == 3) { /* specifies two registers */
reg_name(rm, subtype);
return;
}
if (must_do_size) {
if (wordop) {
if (addrsize==32 || opsize==32) { /* then must specify size */
ua_str("dword ptr ");
} else {
ua_str("word ptr ");
}
} else {
ua_str("byte ptr ");
}
}
if ((mod == 0) && (rm == 5) && (addrsize == 32)) {/* mem operand with 32 bit ofs */
ua_str("%p:[");
outhex('d', extend, 0, addrsize, 0);
uputchar(']');
return;
}
if ((mod == 0) && (rm == 6) && (addrsize == 16)) { /* 16 bit dsplcmnt */
ua_str("%p:[");
outhex('w', extend, 0, addrsize, 0);
uputchar(']');
return;
}
if ((addrsize != 32) || (rm != 4))
ua_str("%p:[");
if (addrsize == 16) {
switch (rm) {
case 0: uprintf("bx+si"); break;
case 1: uprintf("bx+di"); break;
case 2: uprintf("bp+si"); break;
case 3: uprintf("bp+di"); break;
case 4: uprintf("si"); break;
case 5: uprintf("di"); break;
case 6: uprintf("bp"); break;
case 7: uprintf("bx"); break;
}
} else {
switch (rm) {
case 0: uprintf("eax"); break;
case 1: uprintf("ecx"); break;
case 2: uprintf("edx"); break;
case 3: uprintf("ebx"); break;
case 4: do_sib(mod); break;
case 5: uprintf("ebp"); break;
case 6: uprintf("esi"); break;
case 7: uprintf("edi"); break;
}
}
switch (mod) {
case 1:
outhex('b', extend, 1, addrsize, 0);
break;
case 2:
outhex('v', extend, 1, addrsize, 1);
break;
}
uputchar(']');
}
