64bitasm_gcc.cpp

#include <stdio.h>

void set_regs()
{
    void* address = (void*) 0x00000000;
    char *val = (char*) "mmmmmm";
    __asm__ volatile (
        "mov %1, %%rdi \n"
        "mov %0, %%rsp \n"
        : /* no output operand*/
        :"r"(address), "r"(val) /* inputs operands */
        :"%rdi", "rsp");   /* clobbered registers */
}

int main()
{
    set_regs();
    return 0;
}