-/* crypto/async/arch/async_posix.h */
/*
- * Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
- */
-/* ====================================================================
- * Copyright (c) 2015 The OpenSSL Project. 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.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ * Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
*
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED 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 OpenSSL PROJECT OR
- * ITS 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.
- * ====================================================================
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
+
+#ifndef OSSL_CRYPTO_ASYNC_POSIX_H
+#define OSSL_CRYPTO_ASYNC_POSIX_H
#include <openssl/e_os2.h>
-#ifdef OPENSSL_SYS_UNIX
+#if defined(OPENSSL_SYS_UNIX) \
+ && defined(OPENSSL_THREADS) && !defined(OPENSSL_NO_ASYNC) \
+ && !defined(__ANDROID__) && !defined(__OpenBSD__)
# include <unistd.h>
-# if _POSIX_VERSION >= 200112L
+# if _POSIX_VERSION >= 200112L \
+ && (_POSIX_VERSION < 200809L || defined(__GLIBC__))
+
+# include <pthread.h>
-# define ASYNC_SYSV
+# define ASYNC_POSIX
# define ASYNC_ARCH
+# ifdef __CET__
+/*
+ * When Intel CET is enabled, makecontext will create a different
+ * shadow stack for each context. async_fibre_swapcontext cannot
+ * use _longjmp. It must call swapcontext to swap shadow stack as
+ * well as normal stack.
+ */
+# define USE_SWAPCONTEXT
+# endif
# include <ucontext.h>
-
-extern __thread ASYNC_CTX *sysvctx;
+# ifndef USE_SWAPCONTEXT
+# include <setjmp.h>
+# endif
typedef struct async_fibre_st {
ucontext_t fibre;
-} ASYNC_FIBRE;
+# ifndef USE_SWAPCONTEXT
+ jmp_buf env;
+ int env_init;
+# endif
+} async_fibre;
+
+static ossl_inline int async_fibre_swapcontext(async_fibre *o, async_fibre *n, int r)
+{
+# ifdef USE_SWAPCONTEXT
+ swapcontext(&o->fibre, &n->fibre);
+# else
+ o->env_init = 1;
+
+ if (!r || !_setjmp(o->env)) {
+ if (n->env_init)
+ _longjmp(n->env, 1);
+ else
+ setcontext(&n->fibre);
+ }
+# endif
+
+ return 1;
+}
-# define ASYNC_set_ctx(nctx) (sysvctx = (nctx))
-# define ASYNC_get_ctx() (sysvctx)
-# define ASYNC_FIBRE_swapcontext(o,n,r) \
- ((r)? \
- !swapcontext(&(o)->fibre, &(n)->fibre) \
- : \
- !setcontext(&(n)->fibre))
-# define ASYNC_FIBRE_makecontext(c) \
- (ASYNC_FIBRE_init(c) \
- && !getcontext(&(c)->fibre) \
- && (makecontext(&(c)->fibre, ASYNC_start_func, 0), 1))
-# define ASYNC_FIBRE_init_dispatcher(d)
+# define async_fibre_init_dispatcher(d)
-int ASYNC_FIBRE_init(ASYNC_FIBRE *fibre);
-void ASYNC_FIBRE_free(ASYNC_FIBRE *fibre);
+int async_fibre_makecontext(async_fibre *fibre);
+void async_fibre_free(async_fibre *fibre);
# endif
#endif
+#endif /* OSSL_CRYPTO_ASYNC_POSIX_H */
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