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 #if !defined(OPENSSL_NO_ASM) && \ 20 (defined(OPENSSL_X86) || defined(OPENSSL_X86_64)) 21 /* x86 and x86_64 need to record the result of a cpuid call for the asm to work 22 * correctly, unless compiled without asm code. */ 23 #define NEED_CPUID 24 25 #else 26 27 /* Otherwise, don't emit a static initialiser. */ 28 29 #if !defined(BORINGSSL_NO_STATIC_INITIALIZER) 30 #define BORINGSSL_NO_STATIC_INITIALIZER 31 #endif 32 33 #endif /* !OPENSSL_NO_ASM && (OPENSSL_X86 || OPENSSL_X86_64) */ 34 35 #if defined(OPENSSL_WINDOWS) 36 #define OPENSSL_CDECL __cdecl 37 #else 38 #define OPENSSL_CDECL 39 #endif 40 41 #if !defined(BORINGSSL_NO_STATIC_INITIALIZER) 42 #if !defined(OPENSSL_WINDOWS) 43 static void do_library_init(void) __attribute__ ((constructor)); 44 #else 45 #pragma section(".CRT$XCU", read) 46 static void __cdecl do_library_init(void); 47 __declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) = 48 do_library_init; 49 #endif 50 #endif /* !BORINGSSL_NO_STATIC_INITIALIZER */ 51 52 /* do_library_init is the actual initialization function. If 53 * BORINGSSL_NO_STATIC_INITIALIZER isn't defined, this is set as a static 54 * initializer. Otherwise, it is called by CRYPTO_library_init. */ 55 static void OPENSSL_CDECL do_library_init(void) { 56 #if defined(NEED_CPUID) 57 OPENSSL_cpuid_setup(); 58 #endif 59 } 60 61 void CRYPTO_library_init(void) { 62 /* TODO(davidben): It would be tidier if this build knob could be replaced 63 * with an internal lazy-init mechanism that would handle things correctly 64 * in-library. */ 65 #if defined(BORINGSSL_NO_STATIC_INITIALIZER) 66 do_library_init(); 67 #endif 68 } 69
