mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-25 11:11:35 +01:00
a90271c6af
Split userland/arch/<arch>/c/ into inline_asm and intrinsics, and move programs that don't match either up.
28 lines
608 B
C
28 lines
608 B
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#gcc-inline-assembly-register-variables */
|
|
|
|
#include <assert.h>
|
|
#include <inttypes.h>
|
|
|
|
int main(void) {
|
|
register uint32_t x0 __asm__ ("x0");
|
|
register uint32_t x1 __asm__ ("x1");
|
|
uint32_t new_x0;
|
|
uint32_t new_x1;
|
|
{
|
|
x0 = 1;
|
|
x1 = 2;
|
|
__asm__ (
|
|
"add %[x0], x0, #1;"
|
|
"add %[x1], x1, #1;"
|
|
: [x0] "+r" (x0),
|
|
[x1] "+r" (x1)
|
|
:
|
|
:
|
|
);
|
|
new_x0 = x0;
|
|
new_x1 = x1;
|
|
}
|
|
assert(new_x0 == 2);
|
|
assert(new_x1 == 3);
|
|
}
|