musl/src/thread/x32/syscall_cp.s

.text
.global __cp_begin
.hidden __cp_begin
.global __cp_end
.hidden __cp_end
.global __cp_cancel
.hidden __cp_cancel
.hidden __cancel
.global __syscall_cp_internal
.hidden __syscall_cp_internal
.type   __syscall_cp_internal,@function
__syscall_cp_internal:

__cp_begin:
	mov (%rdi),%eax
	test %eax,%eax
	jnz __cancel
	mov %rdi,%r11
	mov %rsi,%rax
	mov %rdx,%rdi
	mov %rcx,%rsi
	mov %r8,%rdx
	mov %r9,%r10
	mov 8(%rsp),%r8
	mov 16(%rsp),%r9
	mov %r11,8(%rsp)
	syscall
__cp_end:
	ret