Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2014, Google Inc. |
| 2 | * |
| 3 | * Permission to use, copy, modify, and/or distribute this software for any |
| 4 | * purpose with or without fee is hereby granted, provided that the above |
| 5 | * copyright notice and this permission notice appear in all copies. |
| 6 | * |
| 7 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 8 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 9 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| 10 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 11 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| 12 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| 13 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
| 14 | |
| 15 | #include <openssl/crypto.h> |
| 16 | |
| 17 | #include "internal.h" |
| 18 | |
| 19 | |
| 20 | #if !defined(OPENSSL_NO_ASM) && \ |
| 21 | (defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || \ |
| 22 | defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)) |
| 23 | /* x86, x86_64 and the ARMs need to record the result of a cpuid call for the |
| 24 | * asm to work correctly, unless compiled without asm code. */ |
| 25 | #define NEED_CPUID |
| 26 | |
| 27 | #else |
| 28 | |
| 29 | /* Otherwise, don't emit a static initialiser. */ |
| 30 | |
| 31 | #if !defined(BORINGSSL_NO_STATIC_INITIALIZER) |
| 32 | #define BORINGSSL_NO_STATIC_INITIALIZER |
| 33 | #endif |
| 34 | |
| 35 | #endif /* !OPENSSL_NO_ASM && (OPENSSL_X86 || OPENSSL_X86_64 || |
| 36 | OPENSSL_ARM || OPENSSL_AARCH64) */ |
| 37 | |
| 38 | |
| 39 | /* The capability variables are defined in this file in order to work around a |
| 40 | * linker bug. When linking with a .a, if no symbols in a .o are referenced |
| 41 | * then the .o is discarded, even if it has constructor functions. |
| 42 | * |
| 43 | * This still means that any binaries that don't include some functionality |
| 44 | * that tests the capability values will still skip the constructor but, so |
| 45 | * far, the init constructor function only sets the capability variables. */ |
| 46 | |
| 47 | #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64) |
| 48 | /* This value must be explicitly initialised to zero in order to work around a |
| 49 | * bug in libtool or the linker on OS X. |
| 50 | * |
| 51 | * If not initialised then it becomes a "common symbol". When put into an |
| 52 | * archive, linking on OS X will fail to resolve common symbols. By |
| 53 | * initialising it to zero, it becomes a "data symbol", which isn't so |
| 54 | * affected. */ |
| 55 | uint32_t OPENSSL_ia32cap_P[4] = {0}; |
| 56 | #elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64) |
| 57 | |
| 58 | #include "arm_arch.h" |
| 59 | |
| 60 | #if defined(__ARM_NEON__) |
| 61 | uint32_t OPENSSL_armcap_P = ARMV7_NEON | ARMV7_NEON_FUNCTIONAL; |
| 62 | #else |
| 63 | uint32_t OPENSSL_armcap_P = ARMV7_NEON_FUNCTIONAL; |
| 64 | #endif |
| 65 | |
| 66 | #endif |
| 67 | |
| 68 | |
| 69 | #if defined(OPENSSL_WINDOWS) |
| 70 | #define OPENSSL_CDECL __cdecl |
| 71 | #else |
| 72 | #define OPENSSL_CDECL |
| 73 | #endif |
| 74 | |
| 75 | #if !defined(BORINGSSL_NO_STATIC_INITIALIZER) |
| 76 | #if !defined(OPENSSL_WINDOWS) |
| 77 | static void do_library_init(void) __attribute__ ((constructor)); |
| 78 | #else |
| 79 | #pragma section(".CRT$XCU", read) |
| 80 | static void __cdecl do_library_init(void); |
| 81 | __declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) = |
| 82 | do_library_init; |
| 83 | #endif |
| 84 | #endif /* !BORINGSSL_NO_STATIC_INITIALIZER */ |
| 85 | |
| 86 | /* do_library_init is the actual initialization function. If |
| 87 | * BORINGSSL_NO_STATIC_INITIALIZER isn't defined, this is set as a static |
| 88 | * initializer. Otherwise, it is called by CRYPTO_library_init. */ |
| 89 | static void OPENSSL_CDECL do_library_init(void) { |
| 90 | /* WARNING: this function may only configure the capability variables. See the |
| 91 | * note above about the linker bug. */ |
| 92 | #if defined(NEED_CPUID) |
| 93 | OPENSSL_cpuid_setup(); |
| 94 | #endif |
| 95 | } |
| 96 | |
| 97 | void CRYPTO_library_init(void) { |
| 98 | /* TODO(davidben): It would be tidier if this build knob could be replaced |
| 99 | * with an internal lazy-init mechanism that would handle things correctly |
| 100 | * in-library. */ |
| 101 | #if defined(BORINGSSL_NO_STATIC_INITIALIZER) |
| 102 | do_library_init(); |
| 103 | #endif |
| 104 | } |
Adam Langley | f40f42d | 2015-03-24 18:25:20 -0700 | [diff] [blame^] | 105 | |
| 106 | const char *SSLeay_version(int unused) { |
| 107 | return SSLeay(); |
| 108 | } |
| 109 | |
| 110 | const char *SSLeay(void) { |
| 111 | return "BoringSSL"; |
| 112 | } |