ARM System Calls: Difference between revisions

You have probably noticed from the first example "swi 42", that the "swi" instruction takes an integer as an argument. To get this argument from the C code, you do:

<source lang="c">

asm volatile ("ldr %0, [lr, #-8]" : "=r" (int_vector));

int_vector &= 0xFFFFFF;