2 * Copyright (C) 2000 Jason Evans <jasone@freebsd.org>.
4 * Copyright (C) 2000 Daniel M. Eischen <eischen@vigrid.com>.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice(s), this list of conditions and the following disclaimer as
12 * the first lines of this file unmodified other than the possible
13 * addition of one or more copyright notices.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice(s), this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
26 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
28 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
29 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #include <sys/param.h>
37 #include <machine/reg.h>
39 #include "pthread_private.h"
42 static inline int check_stack(pthread_t thread, void *stackp);
44 __weak_reference(_thread_siglongjmp, siglongjmp);
45 __weak_reference(_thread_longjmp, longjmp);
46 __weak_reference(__thread_longjmp, _longjmp);
49 _thread_siglongjmp(sigjmp_buf env, int savemask)
51 struct pthread *curthread = _get_curthread();
53 if (check_stack(curthread, (void *) GET_STACK_SJB(env)))
54 PANIC("siglongjmp()ing between thread contexts is undefined by "
58 * The stack pointer is somewhere within the threads stack.
59 * Jump to the users context.
61 __siglongjmp(env, savemask);
65 _thread_longjmp(jmp_buf env, int val)
67 struct pthread *curthread = _get_curthread();
69 if (check_stack(curthread, (void *) GET_STACK_JB(env)))
70 PANIC("longjmp()ing between thread contexts is undefined by "
74 * The stack pointer is somewhere within the threads stack.
75 * Jump to the users context.
81 __thread_longjmp(jmp_buf env, int val)
83 struct pthread *curthread = _get_curthread();
85 if (check_stack(curthread, (void *) GET_STACK_JB(env)))
86 PANIC("_longjmp()ing between thread contexts is undefined by "
90 * The stack pointer is somewhere within the threads stack.
91 * Jump to the users context.
96 /* Returns 0 if stack check is OK, non-zero otherwise. */
98 check_stack(pthread_t thread, void *stackp)
100 void *stack_begin, *stack_end;
102 /* Get the bounds of the current threads stack. */
103 PTHREAD_ASSERT(thread->stack != NULL,
104 "Thread stack pointer is null");
105 stack_begin = thread->stack;
106 stack_end = stack_begin + thread->attr.stacksize_attr;
109 * Make sure we aren't jumping to a different stack. Make sure
110 * jmp_stackp is between stack_begin and stack end, to correctly detect
111 * this condition regardless of whether the stack grows up or down.
113 if (((stackp < stack_begin) && (stackp < stack_end)) ||
114 ((stackp > stack_begin) && (stackp > stack_end)))