17  * __x64_sys_*()         - 64-bit native syscall
20  * __x64_compat_sys_*()  - 64-bit X32 compat syscall
23  * 64-bit: RDI, RSI, RDX, R10, R8, R9
48  *	cltq			<-- extend return value to 64-bit
55 /* Mapping of registers to parameters for syscalls on x86-64 and x32 */
63 #define SYSCALL_PT_ARG6(m, t1, t2, t3, t4, t5, t6)			\  argument
64 	SYSCALL_PT_ARG5(m, t1, t2, t3, t4, t5), m(t6, (regs->bp))
65 #define SYSCALL_PT_ARG5(m, t1, t2, t3, t4, t5)				\  argument
66 	SYSCALL_PT_ARG4(m, t1, t2, t3, t4),  m(t5, (regs->di))
67 #define SYSCALL_PT_ARG4(m, t1, t2, t3, t4)				\  argument
68 	SYSCALL_PT_ARG3(m, t1, t2, t3),  m(t4, (regs->si))
69 #define SYSCALL_PT_ARG3(m, t1, t2, t3)					\  argument
70 	SYSCALL_PT_ARG2(m, t1, t2), m(t3, (regs->dx))
71 #define SYSCALL_PT_ARG2(m, t1, t2)					\  argument
72 	SYSCALL_PT_ARG1(m, t1), m(t2, (regs->cx))
73 #define SYSCALL_PT_ARG1(m, t1) m(t1, (regs->bx))  argument
168  * of the x86-64-style parameter ordering of x32 syscalls. The syscalls common