mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-25 11:11:35 +01:00
27 lines
535 B
ArmAsm
27 lines
535 B
ArmAsm
/* https://github.com/cirosantilli/linux-kernel-module-cheat#x86-bit-and-byte-instructions */
|
|
|
|
#include <lkmc.h>
|
|
|
|
LKMC_PROLOGUE
|
|
mov $0xFF, %r12
|
|
|
|
/* Set Carry flag. */
|
|
stc
|
|
/* Check for carry flag. */
|
|
setc %r12b
|
|
/* Carry flag was set, so set the r12b to 1. */
|
|
LKMC_ASSERT_EQ(%r12, $1)
|
|
|
|
/* Clear carry flag. */
|
|
clc
|
|
setc %r12b
|
|
LKMC_ASSERT_EQ(%r12, $0)
|
|
|
|
#if 0
|
|
/* The operand size can only be one byte:
|
|
* Error: operand size mismatch for `setc'
|
|
*/
|
|
setc %eax
|
|
#endif
|
|
LKMC_EPILOGUE
|