1 //===-- Implementation file of __libc_init_array --------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/__support/macros/config.h" 10 #include <stddef.h> 11 #include <stdint.h> 12 13 namespace LIBC_NAMESPACE_DECL { 14 15 extern "C" { 16 extern uintptr_t __preinit_array_start[]; 17 extern uintptr_t __preinit_array_end[]; 18 extern uintptr_t __init_array_start[]; 19 extern uintptr_t __init_array_end[]; 20 } 21 22 using InitCallback = void(void); 23 24 extern "C" void __libc_init_array(void) { 25 size_t preinit_array_size = __preinit_array_end - __preinit_array_start; 26 for (size_t i = 0; i < preinit_array_size; ++i) 27 reinterpret_cast<InitCallback *>(__preinit_array_start[i])(); 28 size_t init_array_size = __init_array_end - __init_array_start; 29 for (size_t i = 0; i < init_array_size; ++i) 30 reinterpret_cast<InitCallback *>(__init_array_start[i])(); 31 } 32 33 } // namespace LIBC_NAMESPACE_DECL 34