1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/* Copyright (c) 2014, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include <openssl/crypto.h>
#include "internal.h"
#if !defined(OPENSSL_NO_ASM) && \
(defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || \
defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64))
/* x86, x86_64 and the ARMs need to record the result of a cpuid call for the
* asm to work correctly, unless compiled without asm code. */
#define NEED_CPUID
#else
/* Otherwise, don't emit a static initialiser. */
#if !defined(BORINGSSL_NO_STATIC_INITIALIZER)
#define BORINGSSL_NO_STATIC_INITIALIZER
#endif
#endif /* !OPENSSL_NO_ASM && (OPENSSL_X86 || OPENSSL_X86_64 ||
OPENSSL_ARM || OPENSSL_AARCH64) */
/* The capability variables are defined in this file in order to work around a
* linker bug. When linking with a .a, if no symbols in a .o are referenced
* then the .o is discarded, even if it has constructor functions.
*
* This still means that any binaries that don't include some functionality
* that tests the capability values will still skip the constructor but, so
* far, the init constructor function only sets the capability variables. */
#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
/* This value must be explicitly initialised to zero in order to work around a
* bug in libtool or the linker on OS X.
*
* If not initialised then it becomes a "common symbol". When put into an
* archive, linking on OS X will fail to resolve common symbols. By
* initialising it to zero, it becomes a "data symbol", which isn't so
* affected. */
uint32_t OPENSSL_ia32cap_P[4] = {0};
#elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
#include "arm_arch.h"
#if defined(__ARM_NEON__)
uint32_t OPENSSL_armcap_P = ARMV7_NEON | ARMV7_NEON_FUNCTIONAL;
#else
uint32_t OPENSSL_armcap_P = ARMV7_NEON_FUNCTIONAL;
#endif
#endif
#if defined(OPENSSL_WINDOWS)
#define OPENSSL_CDECL __cdecl
#else
#define OPENSSL_CDECL
#endif
#if !defined(BORINGSSL_NO_STATIC_INITIALIZER)
#if !defined(OPENSSL_WINDOWS)
static void do_library_init(void) __attribute__ ((constructor));
#else
#pragma section(".CRT$XCU", read)
static void __cdecl do_library_init(void);
__declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) =
do_library_init;
#endif
#endif /* !BORINGSSL_NO_STATIC_INITIALIZER */
/* do_library_init is the actual initialization function. If
* BORINGSSL_NO_STATIC_INITIALIZER isn't defined, this is set as a static
* initializer. Otherwise, it is called by CRYPTO_library_init. */
static void OPENSSL_CDECL do_library_init(void) {
/* WARNING: this function may only configure the capability variables. See the
* note above about the linker bug. */
#if defined(NEED_CPUID)
OPENSSL_cpuid_setup();
#endif
}
void CRYPTO_library_init(void) {
/* TODO(davidben): It would be tidier if this build knob could be replaced
* with an internal lazy-init mechanism that would handle things correctly
* in-library. */
#if defined(BORINGSSL_NO_STATIC_INITIALIZER)
do_library_init();
#endif
}
|
