__NR_write 8 arch/x86/include/generated/uapi/asm/unistd_32.h #define __NR_write 4 __NR_write 5 arch/x86/include/generated/uapi/asm/unistd_64.h #define __NR_write 1 __NR_write 5 arch/x86/include/generated/uapi/asm/unistd_x32.h #define __NR_write (__X32_SYSCALL_BIT + 1)