+++ /dev/null
-/*
- * Copyright (c) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-#if defined(__i386__)
-
-#define _XOPEN_SOURCE 600L
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <pthread.h>
-#include <signal.h>
-#include <ucontext.h>
-
-extern size_t pthread_get_stacksize_np(pthread_t);
-extern void *pthread_get_stackaddr_np(pthread_t);
-#ifdef __DYNAMIC__
-extern int __in_sigtramp;
-#endif /* __DYNAMIC_ */
-
-__private_extern__ mcontext_t
-getmcontext(ucontext_t *uctx, void *sp)
-{
- pthread_t self = pthread_self();
- mcontext_t mctx = (mcontext_t)&uctx->__mcontext_data;
- size_t stacksize = pthread_get_stacksize_np(self);
- stack_t stack;
-
- uctx->uc_stack.ss_sp = sp;
- uctx->uc_stack.ss_flags = 0;
-
- if (0 == sigaltstack(NULL, &stack)) {
- if (stack.ss_flags & SS_ONSTACK) {
- uctx->uc_stack = stack;
- stacksize = stack.ss_size;
- }
- }
-
- if (stacksize == 0) { /* main thread doesn't have pthread stack size */
- struct rlimit rlim;
- if (0 == getrlimit(RLIMIT_STACK, &rlim))
- stacksize = rlim.rlim_cur;
- }
-
- uctx->uc_stack.ss_size = stacksize;
-
- if (uctx->uc_mcontext != mctx) {
- uctx->uc_mcontext = mctx;
-
-#ifdef __DYNAMIC__
- uctx->uc_link = (ucontext_t*)__in_sigtramp; /* non-zero if in signal handler */
-#else /* !__DYNAMIC__ */
- uctx->uc_link = 0;
-#endif /* __DYNAMIC__ */
-
- }
-
- sigprocmask(0, NULL, &uctx->uc_sigmask);
- return mctx;
-}
-
-#endif /* __i386__ */