-SYSCALL_DEFINE0(fork)
-{
- struct pt_regs *regs = task_pt_regs(current);
- return do_fork(SIGCHLD, regs->gprs[15], regs, 0, NULL, NULL);
-}
-
-SYSCALL_DEFINE4(clone, unsigned long, newsp, unsigned long, clone_flags,
- int __user *, parent_tidptr, int __user *, child_tidptr)
-{
- struct pt_regs *regs = task_pt_regs(current);
-
- if (!newsp)
- newsp = regs->gprs[15];
- return do_fork(clone_flags, newsp, regs, 0,
- parent_tidptr, child_tidptr);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-SYSCALL_DEFINE0(vfork)
-{
- struct pt_regs *regs = task_pt_regs(current);
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
- regs->gprs[15], regs, 0, NULL, NULL);
-}
-