inline_asm.cpp

int foo(char* x, char*, int a, int b) { return a + b; }

typedef int (*func)(int, int);

int main() {
    int a = 10, b = 20, c = 0;

    void* p = (void*)foo;
    __asm__ __volatile__(
        "movl %%edx,%%esi; "
        "movl %%ecx, %%edi; "
        "call *%%rax;"

        : "=a"(c)
        : "d"(a), "c"(b), "a"(p));

    cout << c << endl;
}