From d2125043aebf7f53cd1c72115c17b01d0bc06ce1 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 23 Oct 2012 13:17:59 -0400 Subject: generic sys_fork / sys_vfork / sys_clone ... and get rid of idiotic struct pt_regs * in asm-generic/syscalls.h prototypes of the same, while we are at it. Eventually we want those in linux/syscalls.h, of course, but that'll have to wait a bit. Note that there are *three* variants of sys_clone() order of arguments. Braindamage galore... Signed-off-by: Al Viro --- kernel/fork.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) (limited to 'kernel/fork.c') diff --git a/kernel/fork.c b/kernel/fork.c index 8b20ab7d3aa2..27a337549dab 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1645,6 +1645,49 @@ pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) } #endif +#ifdef __ARCH_WANT_SYS_FORK +SYSCALL_DEFINE0(fork) +{ +#ifdef CONFIG_MMU + return do_fork(SIGCHLD, 0, current_pt_regs(), 0, NULL, NULL); +#else + /* can not support in nommu mode */ + return(-EINVAL); +#endif +} +#endif + +#ifdef __ARCH_WANT_SYS_VFORK +SYSCALL_DEFINE0(vfork) +{ + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0, current_pt_regs(), + 0, NULL, NULL); +} +#endif + +#ifdef __ARCH_WANT_SYS_CLONE +#ifdef CONFIG_CLONE_BACKWARDS +SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp, + int __user *, parent_tidptr, + int, tls_val, + int __user *, child_tidptr) +#elif defined(CONFIG_CLONE_BACKWARDS2) +SYSCALL_DEFINE5(clone, unsigned long, newsp, unsigned long, clone_flags, + int __user *, parent_tidptr, + int __user *, child_tidptr, + int, tls_val) +#else +SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp, + int __user *, parent_tidptr, + int __user *, child_tidptr, + int, tls_val) +#endif +{ + return do_fork(clone_flags, newsp, current_pt_regs(), 0, + parent_tidptr, child_tidptr); +} +#endif + #ifndef ARCH_MIN_MMSTRUCT_ALIGN #define ARCH_MIN_MMSTRUCT_ALIGN 0 #endif -- cgit v1.2.3