diff options
Diffstat (limited to 'libc/sysdeps/linux/v850/clone.c')
| -rw-r--r-- | libc/sysdeps/linux/v850/clone.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/v850/clone.c b/libc/sysdeps/linux/v850/clone.c new file mode 100644 index 000000000..33e96b449 --- /dev/null +++ b/libc/sysdeps/linux/v850/clone.c @@ -0,0 +1,48 @@ +/* + * libc/sysdeps/linux/v850/clone.c -- `clone' syscall for linux/v850 + * + * Copyright (C) 2002 NEC Electronics Corporation + * Copyright (C) 2002 Miles Bader <miles@gnu.org> + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + * Written by Miles Bader <miles@gnu.org> + */ + +#include <errno.h> +#include <sys/syscall.h> + +int +clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg) +{ + register unsigned long rval asm (SYSCALL_RET) = -EINVAL; + + if (fn && child_stack) + { + register unsigned long syscall asm (SYSCALL_NUM); + register unsigned long arg0 asm (SYSCALL_ARG0); + + /* Clone this thread. */ + arg0 = flags; + syscall = __NR_clone; + asm volatile ("trap " SYSCALL_SHORT_TRAP + : "=r" (rval), "=r" (syscall) + : "1" (syscall), "r" (arg0) + : SYSCALL_SHORT_CLOBBERS); + + if (rval == 0) + /* In child thread, call FN and exit. */ + { + arg0 = (*fn) (arg); + syscall = __NR_exit; + asm volatile ("trap " SYSCALL_SHORT_TRAP + : "=r" (rval), "=r" (syscall) + : "1" (syscall), "r" (arg0) + : SYSCALL_SHORT_CLOBBERS); + } + } + + __syscall_return (int, rval); +} |