Note that this was necessary, because on some processors you cannot directly access the address of the program counter, so as this stackoverflow answer explains...

http://stackoverflow.com/a/7932364/419237

the canonical way to get it on x86 is to jump to a subroutine right in front of you, and pop the return address of the stack, instead of "ret" popping the return-address and, well... returning.

But actually you can translate the 6502 solution directly to x86 assembler (gcc on Linux):

#include <stdio.h>

int main(int argc, char argv) { void p;

		(void) argc;
		(void) argv;

		printf("main is at %p\n",&main);

		__asm__(
			"	jmp 1f\n"            /* that's the IORTS */
			"0:     ret\n"               /* subroutine */
			"1:     call 0b\n"           /* call IORTS */
			"       sub $0x4,%%esp\n"    /* decrease stackpointer */
			"       pop %0\n": "=r"(p)); /* pop register */

		printf("PC = %p\n",p);
		return 0;
	}