.global sys_fork_trampoline
sys_fork_trampoline:
pushq %rbx
pushq %rbp
pushq %r12
pushq %r13
pushq %r14
pushq %r15
call read_rip
testq %rax, %rax
je .done
movq %rax, %rsi
movq %rsp, %rdi
call sys_fork
.done:
popq %r15
popq %r14
popq %r13
popq %r12
popq %rbp
popq %rbx
ret