| 1 | /*
|
|---|
| 2 | * Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
|
|---|
| 3 | *
|
|---|
| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
|
|---|
| 5 | * this file except in compliance with the License. You can obtain a copy
|
|---|
| 6 | * in the file LICENSE in the source distribution or at
|
|---|
| 7 | * https://www.openssl.org/source/license.html
|
|---|
| 8 | */
|
|---|
| 9 |
|
|---|
| 10 | #ifndef OSSL_CRYPTO_ASYNC_POSIX_H
|
|---|
| 11 | #define OSSL_CRYPTO_ASYNC_POSIX_H
|
|---|
| 12 | #include <openssl/e_os2.h>
|
|---|
| 13 |
|
|---|
| 14 | #if defined(OPENSSL_SYS_UNIX) \
|
|---|
| 15 | && defined(OPENSSL_THREADS) && !defined(OPENSSL_NO_ASYNC) \
|
|---|
| 16 | && !defined(__ANDROID__) && !defined(__OpenBSD__)
|
|---|
| 17 |
|
|---|
| 18 | # include <unistd.h>
|
|---|
| 19 |
|
|---|
| 20 | # if _POSIX_VERSION >= 200112L \
|
|---|
| 21 | && (_POSIX_VERSION < 200809L || defined(__GLIBC__))
|
|---|
| 22 |
|
|---|
| 23 | # include <pthread.h>
|
|---|
| 24 |
|
|---|
| 25 | # define ASYNC_POSIX
|
|---|
| 26 | # define ASYNC_ARCH
|
|---|
| 27 |
|
|---|
| 28 | # ifdef __CET__
|
|---|
| 29 | /*
|
|---|
| 30 | * When Intel CET is enabled, makecontext will create a different
|
|---|
| 31 | * shadow stack for each context. async_fibre_swapcontext cannot
|
|---|
| 32 | * use _longjmp. It must call swapcontext to swap shadow stack as
|
|---|
| 33 | * well as normal stack.
|
|---|
| 34 | */
|
|---|
| 35 | # define USE_SWAPCONTEXT
|
|---|
| 36 | # endif
|
|---|
| 37 | # include <ucontext.h>
|
|---|
| 38 | # ifndef USE_SWAPCONTEXT
|
|---|
| 39 | # include <setjmp.h>
|
|---|
| 40 | # endif
|
|---|
| 41 |
|
|---|
| 42 | typedef struct async_fibre_st {
|
|---|
| 43 | ucontext_t fibre;
|
|---|
| 44 | # ifndef USE_SWAPCONTEXT
|
|---|
| 45 | jmp_buf env;
|
|---|
| 46 | int env_init;
|
|---|
| 47 | # endif
|
|---|
| 48 | } async_fibre;
|
|---|
| 49 |
|
|---|
| 50 | static ossl_inline int async_fibre_swapcontext(async_fibre *o, async_fibre *n, int r)
|
|---|
| 51 | {
|
|---|
| 52 | # ifdef USE_SWAPCONTEXT
|
|---|
| 53 | swapcontext(&o->fibre, &n->fibre);
|
|---|
| 54 | # else
|
|---|
| 55 | o->env_init = 1;
|
|---|
| 56 |
|
|---|
| 57 | if (!r || !_setjmp(o->env)) {
|
|---|
| 58 | if (n->env_init)
|
|---|
| 59 | _longjmp(n->env, 1);
|
|---|
| 60 | else
|
|---|
| 61 | setcontext(&n->fibre);
|
|---|
| 62 | }
|
|---|
| 63 | # endif
|
|---|
| 64 |
|
|---|
| 65 | return 1;
|
|---|
| 66 | }
|
|---|
| 67 |
|
|---|
| 68 | # define async_fibre_init_dispatcher(d)
|
|---|
| 69 |
|
|---|
| 70 | int async_fibre_makecontext(async_fibre *fibre);
|
|---|
| 71 | void async_fibre_free(async_fibre *fibre);
|
|---|
| 72 |
|
|---|
| 73 | # endif
|
|---|
| 74 | #endif
|
|---|
| 75 | #endif /* OSSL_CRYPTO_ASYNC_POSIX_H */
|
|---|
