-/*
- * Copyright (c) 2000-2003, 2008, 2012 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@
- */
-/*
- * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
- * All Rights Reserved
- *
- * Permission to use, copy, modify, and distribute this software and
- * its documentation for any purpose and without fee is hereby granted,
- * provided that the above copyright notice appears in all copies and
- * that both the copyright notice and this permission notice appear in
- * supporting documentation.
- *
- * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
- * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-/*
- * MkLinux
- */
-
-/*
- * Machine specific support for thread initialization
- */
-
-#include "internal.h"
-#include <platform/string.h>
-
-
-/*
- * Set up the initial state of a MACH thread
- */
-void
-_pthread_setup(pthread_t thread,
- void (*routine)(pthread_t),
- void *vsp,
- int suspended,
- int needresume)
-{
-#if defined(__i386__)
- i386_thread_state_t state = { };
- thread_state_flavor_t flavor = x86_THREAD_STATE32;
- mach_msg_type_number_t count = i386_THREAD_STATE_COUNT;
-#elif defined(__x86_64__)
- x86_thread_state64_t state = { };
- thread_state_flavor_t flavor = x86_THREAD_STATE64;
- mach_msg_type_number_t count = x86_THREAD_STATE64_COUNT;
-#elif defined(__arm__)
- arm_thread_state_t state = { };
- thread_state_flavor_t flavor = ARM_THREAD_STATE;
- mach_msg_type_number_t count = ARM_THREAD_STATE_COUNT;
-#else
-#error _pthread_setup not defined for this architecture
-#endif
-
- if (suspended) {
- (void)thread_get_state(_pthread_kernel_thread(thread),
- flavor,
- (thread_state_t)&state,
- &count);
- }
-
-#if defined(__i386__)
- uintptr_t *sp = vsp;
-
- state.__eip = (uintptr_t)routine;
-
- // We need to simulate a 16-byte aligned stack frame as if we had
- // executed a call instruction. Since we're "pushing" one argument,
- // we need to adjust the pointer by 12 bytes (3 * sizeof (int *))
- sp -= 3; // make sure stack is aligned
- *--sp = (uintptr_t)thread; // argument to function
- *--sp = 0; // fake return address
- state.__esp = (uintptr_t)sp; // set stack pointer
-#elif defined(__x86_64__)
- uintptr_t *sp = vsp;
-
- state.__rip = (uintptr_t)routine;
-
- // We need to simulate a 16-byte aligned stack frame as if we had
- // executed a call instruction. The stack should already be aligned
- // before it comes to us and we don't need to push any arguments,
- // so we shouldn't need to change it.
- state.__rdi = (uintptr_t)thread; // argument to function
- *--sp = 0; // fake return address
- state.__rsp = (uintptr_t)sp; // set stack pointer
-#elif defined(__arm__)
- state.__pc = (uintptr_t)routine;
-
- // Detect switch to thumb mode.
- if (state.__pc & 1) {
- state.__pc &= ~1;
- state.__cpsr |= 0x20; /* PSR_THUMB */
- }
-
- state.__sp = (uintptr_t)vsp - C_ARGSAVE_LEN - C_RED_ZONE;
- state.__r[0] = (uintptr_t)thread;
-#else
-#error _pthread_setup not defined for this architecture
-#endif
-
- if (suspended) {
- (void)thread_set_state(_pthread_kernel_thread(thread), flavor, (thread_state_t)&state, count);
- if (needresume) {
- (void)thread_resume(_pthread_kernel_thread(thread));
- }
- } else {
- mach_port_t kernel_thread;
- (void)thread_create_running(mach_task_self(), flavor, (thread_state_t)&state, count, &kernel_thread);
- _pthread_set_kernel_thread(thread, kernel_thread);
- }
-}
-
-// pthread_setup initializes large structures to 0, which the compiler turns into a library call to memset. To avoid linking against
-// Libc, provide a simple wrapper that calls through to the libplatform primitives
-
-#undef memset
-__attribute__((visibility("hidden"))) void *
-memset(void *b, int c, size_t len)
-{
- return _platform_memset(b, c, len);
-}
-
-#undef bzero
-__attribute__((visibility("hidden"))) void
-bzero(void *s, size_t n)
-{
- _platform_bzero(s, n);
-}
projects / apple / libpthread.git / blobdiff