diff options
Diffstat (limited to 'libc/sysdeps/linux/avr32/clone.c')
-rw-r--r-- | libc/sysdeps/linux/avr32/clone.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/avr32/clone.c b/libc/sysdeps/linux/avr32/clone.c new file mode 100644 index 000000000..c5f5a74a8 --- /dev/null +++ b/libc/sysdeps/linux/avr32/clone.c @@ -0,0 +1,41 @@ +/* + * Copyright (C) 2004 Atmel Corporation + * + * This file is subject to the terms and conditions of the GNU Lesser General + * Public License. See the file "COPYING.LIB" in the main directory of this + * archive for more details. + */ +#include <errno.h> +#include <sys/syscall.h> +#include <unistd.h> + +/* + * I don't know if we can be absolutely certain that the fn and arg + * parameters are preserved when returning as the child. If the + * compiler stores them in registers (r0-r7), they should be. + */ +int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg) +{ + register int (*_fn)(void *arg) = fn; + register void *_arg = arg; + int err; + + /* Sanity check the arguments */ + err = -EINVAL; + if (!fn) + goto syscall_error; + if (!child_stack) + goto syscall_error; + + err = INLINE_SYSCALL(clone, 2, flags, child_stack); + if (err < 0) + goto syscall_error; + else if (err != 0) + return err; + + _exit(_fn(_arg)); + +syscall_error: + __set_errno (-err); + return -1; +} |