diff options
Diffstat (limited to 'lib/libpthread/thread/thr_sigaltstack.c')
-rw-r--r-- | lib/libpthread/thread/thr_sigaltstack.c | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/lib/libpthread/thread/thr_sigaltstack.c b/lib/libpthread/thread/thr_sigaltstack.c deleted file mode 100644 index 8ebbdee..0000000 --- a/lib/libpthread/thread/thr_sigaltstack.c +++ /dev/null @@ -1,110 +0,0 @@ -/*- - * Copyright (c) 2003 David Xu <davidxu@freebsd.org> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <errno.h> -#include <signal.h> -#include "thr_private.h" - -LT10_COMPAT_PRIVATE(_sigaltstack); -LT10_COMPAT_DEFAULT(sigaltstack); - -__weak_reference(_sigaltstack, sigaltstack); - -int -_sigaltstack(stack_t *_ss, stack_t *_oss) -{ - struct pthread *curthread = _get_curthread(); - stack_t ss, oss; - int oonstack, errsave, ret; - kse_critical_t crit; - - if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) { - crit = _kse_critical_enter(); - ret = __sys_sigaltstack(_ss, _oss); - errsave = errno; - /* Get a copy */ - if (ret == 0 && _ss != NULL) - curthread->sigstk = *_ss; - _kse_critical_leave(crit); - errno = errsave; - return (ret); - } - - if (_ss) - ss = *_ss; - if (_oss) - oss = *_oss; - - /* Should get and set stack in atomic way */ - crit = _kse_critical_enter(); - oonstack = _thr_sigonstack(&ss); - if (_oss != NULL) { - oss = curthread->sigstk; - oss.ss_flags = (curthread->sigstk.ss_flags & SS_DISABLE) - ? SS_DISABLE : ((oonstack) ? SS_ONSTACK : 0); - } - - if (_ss != NULL) { - if (oonstack) { - _kse_critical_leave(crit); - errno = EPERM; - return (-1); - } - if ((ss.ss_flags & ~SS_DISABLE) != 0) { - _kse_critical_leave(crit); - errno = EINVAL; - return (-1); - } - if (!(ss.ss_flags & SS_DISABLE)) { - if (ss.ss_size < MINSIGSTKSZ) { - _kse_critical_leave(crit); - errno = ENOMEM; - return (-1); - } - curthread->sigstk = ss; - } else { - curthread->sigstk.ss_flags |= SS_DISABLE; - } - } - _kse_critical_leave(crit); - if (_oss != NULL) - *_oss = oss; - return (0); -} - -int -_thr_sigonstack(void *sp) -{ - struct pthread *curthread = _get_curthread(); - - return ((curthread->sigstk.ss_flags & SS_DISABLE) == 0 ? - (((size_t)sp - (size_t)curthread->sigstk.ss_sp) < curthread->sigstk.ss_size) - : 0); -} - |