Code Generation/Example 2

The Original Code

Consider the following C function:

const char *a = "batata";
int main() {
  prints(a);
  return 0;
}

Postfix Code

The Postfix code for the above function is as follows:

Postfix code
;--- declaring the string literal RODATA ALIGN LABEL _L123 ;; automatic label SSTRING "batata" ;--- declaring the global variable "a" DATA ALIGN LABEL a SADDR _L123 ;; automatic label ;--- this is the main function (note that "s9" translates to RTS's "_main") TEXT ALIGN GLOBAL _main, FUNC LABEL _main ENTER 0 ADDR a LDINT EXTERN prints CALL prints TRASH 4 INT 0 STFVAL32 LEAVE RET

Compiling and Running

To test the second program directly, pf2asm can be used:

pf2asm batata.pf
yasm -felf batata.asm
ld -o batata batata.o -lrts