/* * Copyright (c) 2004, 2008 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(__ppc__) #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 /* __ppc__ */