/*
* helper functions to print instructions
*/
void print_fop(struct filter_op *fop, u_int32 eip)
{
switch (fop->opcode) {
case FOP_TEST:
print_test(fop, eip);
break;
case FOP_ASSIGN:
print_assign(fop, eip);
break;
case FOP_INC:
print_inc(fop, eip);
break;
case FOP_DEC:
print_dec(fop, eip);
break;
case FOP_FUNC:
print_function(fop, eip);
break;
case FOP_JMP:
fprintf(stdout, "%04lu: JUMP ALWAYS to %04d\n", (unsigned long)eip, fop->op.jmp);
break;
case FOP_JTRUE:
fprintf(stdout, "%04lu: JUMP IF TRUE to %04d\n", (unsigned long)eip, fop->op.jmp);
break;
case FOP_JFALSE:
fprintf(stdout, "%04lu: JUMP IF FALSE to %04d\n", (unsigned long)eip, fop->op.jmp);
break;
case FOP_EXIT:
fprintf(stdout, "%04lu: EXIT\n", (unsigned long)eip);
break;
default:
fprintf(stderr, "UNDEFINED OPCODE (%d) !!\n", fop->opcode);
exit(-1);
break;
}
}
/*
Print statments in proc
*/
void print_stmt(Stmt stmt, char* proc_id) {
// Print based on statement kind
switch (stmt->kind) {
case STMT_ASSIGN:
print_assign(stmt->info.assign, proc_id);
break;
case STMT_ASSIGN_ARRAY:
print_assign_array(stmt->info.assign,
stmt->info.assign.exprs, proc_id);
break;
case STMT_COND:{
printf("#if\n");
// Form label
char ifCountStr[15];
char str[80];
if (stmt->info.cond.else_branch != NULL) {
sprintf(ifCountStr, "%d", ifcount);
strcpy (str,"else_");
strcat (str,ifCountStr);
}
else {
sprintf(ifCountStr, "%d", ifcount);
strcpy (str,"end_if_");
strcat (str,ifCountStr);
}
int currentIfCount = ifcount;
ifcount++;
// print conditions of if statment
print_cond(stmt->info.cond.cond, proc_id, 0, 0, str, "");
// Print then statements
print_stmts(stmt->info.cond.then_branch, proc_id);
// Print labels
char endIfLabel[80];
char currCountStr[15];
sprintf(currCountStr, "%d", currentIfCount);
strcpy (endIfLabel,"end_if_");
strcat (endIfLabel,currCountStr);
// Print else statements
if (stmt->info.cond.else_branch != NULL) {
// Branch unconditional
printf("branch_uncond %s\n", endIfLabel);
// Do False
printf("%s:\n", str);
print_stmts(stmt->info.cond.else_branch, proc_id);
}
// print label
printf("%s:\n", endIfLabel);
printf("\n");
break;
}
case STMT_WHILE:{
// Print start of while label
printf("#while\n");
char whileStr[15];
sprintf(whileStr, "%d", loopcount);
char top[80];
strcpy (top,"top_of_loop_");
strcat (top,whileStr);
char loopbreak[80];
strcpy (loopbreak,"loop_is_false_");
strcat (loopbreak,whileStr);
int currentLoopCount = loopcount;
loopcount++;
// print while condition
print_cond(stmt->info.loop.cond, proc_id, 0, 1, top, loopbreak);
// Print statements
print_stmts(stmt->info.loop.body, proc_id);
// Print unconditional branch
printf("branch_uncond %s\n", top);
// Print end loop label
printf("%s:\n", loopbreak);
printf("\n");
break;
}
case STMT_READ:
print_read(stmt, proc_id);
break;
case STMT_READ_ARRAY:
print_read_array(stmt, proc_id);
break;
case STMT_WRITE:
print_write(stmt, proc_id);
break;
case STMT_FNCALL:
print_fncall(stmt, proc_id);
break;
}
}
