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#
# usr/klibc/arch/x86_64/vfork.S
#
# vfork is nasty - there must be nothing at all on the stack above
# the stack frame of the enclosing function.
#
#include <asm/unistd.h>
.text
.align 4
.globl vfork
.type vfork, @function
vfork:
pop %rdx /* Return address */
movl $__NR_vfork, %eax
syscall
push %rdx
cmpq $-4095, %rax
jae 1f
ret
1:
negl %eax
movl %eax, errno(%rip)
orq $-1, %rax
ret
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