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#include <stdio.h>
#include <stdlib.h>
#include "libdis.h"
#ifdef _MSC_VER
#define snprintf _snprintf
#define inline __inline
#endif
int x86_insn_is_valid( x86_insn_t *insn ) {
if ( insn && insn->type != insn_invalid && insn->size > 0 ) {
return 1;
}
return 0;
}
uint32_t x86_get_address( x86_insn_t *insn ) {
x86_oplist_t *op_lst;
if (! insn || ! insn->operands ) {
return 0;
}
for (op_lst = insn->operands; op_lst; op_lst = op_lst->next ) {
if ( op_lst->op.type == op_offset ) {
return op_lst->op.data.offset;
} else if ( op_lst->op.type == op_absolute ) {
if ( op_lst->op.datatype == op_descr16 ) {
return (uint32_t)
op_lst->op.data.absolute.offset.off16;
}
return op_lst->op.data.absolute.offset.off32;
}
}
return 0;
}
int32_t x86_get_rel_offset( x86_insn_t *insn ) {
x86_oplist_t *op_lst;
if (! insn || ! insn->operands ) {
return 0;
}
for (op_lst = insn->operands; op_lst; op_lst = op_lst->next ) {
if ( op_lst->op.type == op_relative_near ) {
return (int32_t) op_lst->op.data.relative_near;
} else if ( op_lst->op.type == op_relative_far ) {
return op_lst->op.data.relative_far;
}
}
return 0;
}
x86_op_t * x86_get_branch_target( x86_insn_t *insn ) {
x86_oplist_t *op_lst;
if (! insn || ! insn->operands ) {
return NULL;
}
for (op_lst = insn->operands; op_lst; op_lst = op_lst->next ) {
if ( op_lst->op.access & op_execute ) {
return &(op_lst->op);
}
}
return NULL;
}
x86_op_t * x86_get_imm( x86_insn_t *insn ) {
x86_oplist_t *op_lst;
if (! insn || ! insn->operands ) {
return NULL;
}
for (op_lst = insn->operands; op_lst; op_lst = op_lst->next ) {
if ( op_lst->op.type == op_immediate ) {
return &(op_lst->op);
}
}
return NULL;
}
#define IS_PROPER_IMM( x ) \
x->op.type == op_immediate && ! (x->op.flags & op_hardcode)
/* if there is an immediate value in the instruction, return a pointer to
* it */
unsigned char * x86_get_raw_imm( x86_insn_t *insn ) {
int size, offset;
x86_op_t *op = NULL;
if (! insn || ! insn->operands ) {
return(NULL);
}
/* a bit inelegant, but oh well... */
if ( IS_PROPER_IMM( insn->operands ) ) {
op = &insn->operands->op;
} else if ( insn->operands->next ) {
if ( IS_PROPER_IMM( insn->operands->next ) ) {
op = &insn->operands->next->op;
} else if ( insn->operands->next->next &&
IS_PROPER_IMM( insn->operands->next->next ) ) {
op = &insn->operands->next->next->op;
}
}
if (! op ) {
return( NULL );
}
/* immediate data is at the end of the insn */
size = x86_operand_size( op );
offset = insn->size - size;
return( &insn->bytes[offset] );
}
unsigned int x86_operand_size( x86_op_t *op ) {
switch (op->datatype ) {
case op_byte: return 1;
case op_word: return 2;
case op_dword: return 4;
case op_qword: return 8;
case op_dqword: return 16;
case op_sreal: return 4;
case op_dreal: return 8;
case op_extreal: return 10;
case op_bcd: return 10;
case op_ssimd: return 16;
case op_dsimd: return 16;
case op_sssimd: return 4;
case op_sdsimd: return 8;
case op_descr32: return 6;
case op_descr16: return 4;
case op_pdescr32: return 6;
case op_pdescr16: return 6;
case op_bounds16: return 4;
case op_bounds32: return 8;
case op_fpuenv16: return 14;
case op_fpuenv32: return 28;
case op_fpustate16: return 94;
case op_fpustate32: return 108;
case op_fpregset: return 512;
case op_fpreg: return 10;
case op_none: return 0;
}
return(4); /* default size */
}
void x86_set_insn_addr( x86_insn_t *insn, uint32_t addr ) {
if ( insn ) insn->addr = addr;
}
void x86_set_insn_offset( x86_insn_t *insn, unsigned int offset ){
if ( insn ) insn->offset = offset;
}
void x86_set_insn_function( x86_insn_t *insn, void * func ){
if ( insn ) insn->function = func;
}
void x86_set_insn_block( x86_insn_t *insn, void * block ){
if ( insn ) insn->block = block;
}
void x86_tag_insn( x86_insn_t *insn ){
if ( insn ) insn->tag = 1;
}
void x86_untag_insn( x86_insn_t *insn ){
if ( insn ) insn->tag = 0;
}
int x86_insn_is_tagged( x86_insn_t *insn ){
return insn->tag;
}
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