1 /* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Richard Henderson <rth@tamu.edu>, 1996.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 /* clone() is even more special than fork() as it mucks with stacks
21 and invokes a function in the right context after its all over. */
27 /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg) */
40 /* Sanity check arguments. */
42 beq a0,$error /* no NULL function pointers */
43 beq a1,$error /* no NULL stack pointers */
45 /* Do the system call */
46 mov a0,pv /* get fn ptr out of the way */
47 mov a3,t0 /* get fn arg out of the way */
55 /* Successful return from the parent */
58 /* Something bad happened -- no child created */
62 jmp zero,__syscall_error
66 /* Load up the arguments to the function. Put this block of code in
67 its own function so that we can terminate the stack trace with our
76 /* Call the user's function */
81 /* Call _exit rather than doing it inline for breakpoint purposes */
90 weak_alias(__clone, clone)