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4ebeef489c
which is rather tightly coupled with GNU libc, unlike the older version of this port. LinuxThreads has added many features since it was integrated with GNU libc, which means that a number of interfaces that were borrowed from libc_r are no longer needed. This updated port required a lot of reworking of the port, so there are likely to be new bugs.
92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/*
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* Copyright (c) 1999 Richard Seaman, Jr.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Richard Seaman, Jr.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY RICHARD SEAMAN, Jr. AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/types.h>
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#include <sys/signal.h>
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#include <sys/unistd.h>
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#include <errno.h>
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#include <clone.h>
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#pragma weak clone=__clone
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extern int __clone __P ((int (*__fn) (void *), void *__child_stack,
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int __flags, void *__arg))
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{
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int bsd_flags;
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int exit_signal;
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/* We don't have qn equivalent to CLONE_PID yet */
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if (__flags & CLONE_PID)
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return (-1);
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if (__child_stack == (void *)0)
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return (-1);
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/* RFTHREAD probably not necessary here, but it shouldn't hurt either */
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bsd_flags = RFPROC | RFTHREAD;
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/* We only allow one alternative to SIGCHLD, and thats
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* SIGUSR1. This is less flexible than Linux, but
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* we don't really have a way to pass a one byte
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* exit signal to rfork, which is what Linux passes to
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* its clone syscall. OTOH, we haven't seen Linux use
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* a value other than 0 (which implies SIGCHLD), SIGCHLD,
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* or SIGUSER1 so far.
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*/
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exit_signal = ((unsigned int)__flags) & CSIGNAL;
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switch (exit_signal){
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case 0:
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case SIGCHLD:
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/* SIGCHLD is the default for BSD, so we don't have
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* to do anything special in this case.
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*/
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break;
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case SIGUSR2:
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bsd_flags |= RFLINUXTHPN;
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break;
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default:
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return (-1);
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}
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if (__flags & CLONE_VM)
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bsd_flags |= RFMEM;
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if (__flags & CLONE_SIGHAND)
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bsd_flags |= RFSIGSHARE;
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if (!(__flags & CLONE_FILES))
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bsd_flags |= RFFDG;
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/* _clone is in clone.S, and takes bsd style rfork flags */
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return (_clone (__fn, __child_stack, bsd_flags, __arg));
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}
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