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#
# usr/klibc/arch/i386/vfork.S
#
# vfork is nasty - there must be nothing at all on the stack above
# the stack frame of the enclosing function.
#
# We *MUST* use int $0x80, because calling the vdso would screw up
# our stack handling.
#
#include <asm/unistd.h>
.text
.align 4
.globl vfork
.type vfork, @function
vfork:
popl %edx /* Return address */
movl $__NR_vfork, %eax
int $0x80 /* DO NOT call the vdso here! */
pushl %edx
cmpl $-4095, %eax
jae 1f
ret
1:
negl %eax
movl %eax, errno
orl $-1, %eax
ret
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