1 /*- 2 * SPDX-License-Identifier: BSD-1-Clause 3 * 4 * Copyright 2018 Andrew Turner 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 13 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 14 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 15 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 16 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 17 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 18 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 19 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 22 */ 23 24 #include <sys/cdefs.h> 25 __FBSDID("$FreeBSD$"); 26 27 #include <sys/param.h> 28 29 #include "crt.h" 30 31 typedef void (*crt_func)(void); 32 33 extern void *__dso_handle __hidden; 34 35 #ifdef SHARED 36 void *__dso_handle = &__dso_handle; 37 #else 38 void *__dso_handle = 0; 39 #endif 40 41 /* 42 * On some architectures and toolchains we may need to call the .dtors. 43 * These are called in the order they are in the ELF file. 44 */ 45 #ifdef HAVE_CTORS 46 static void __do_global_dtors_aux(void) __used; 47 48 static crt_func __CTOR_LIST__[] __section(".ctors") __used = { 49 (crt_func)-1 50 }; 51 static crt_func __DTOR_LIST__[] __section(".dtors") __used = { 52 (crt_func)-1 53 }; 54 55 static void 56 __do_global_dtors_aux(void) 57 { 58 crt_func fn; 59 int n; 60 61 for (n = 1;; n++) { 62 fn = __DTOR_LIST__[n]; 63 if (fn == (crt_func)0 || fn == (crt_func)-1) 64 break; 65 fn(); 66 } 67 } 68 69 asm ( 70 ".pushsection .fini \n" 71 "\t" INIT_CALL_SEQ(__do_global_dtors_aux) "\n" 72 ".popsection \n" 73 ); 74 #endif 75 76 /* 77 * Handler for gcj. These provide a _Jv_RegisterClasses function and fill 78 * out the .jcr section. We just need to call this function with a pointer 79 * to the appropriate section. 80 */ 81 extern void _Jv_RegisterClasses(void *) __weak_symbol; 82 static void register_classes(void) __used; 83 84 static crt_func __JCR_LIST__[] __section(".jcr") __used = { }; 85 86 #ifndef CTORS_CONSTRUCTORS 87 __attribute__((constructor)) 88 #endif 89 static void 90 register_classes(void) 91 { 92 93 if (_Jv_RegisterClasses != NULL && __JCR_LIST__[0] != 0) 94 _Jv_RegisterClasses(__JCR_LIST__); 95 } 96 97 /* 98 * We can't use constructors when they use the .ctors section as they may be 99 * placed before __CTOR_LIST__. 100 */ 101 #ifdef CTORS_CONSTRUCTORS 102 asm ( 103 ".pushsection .init \n" 104 "\t" INIT_CALL_SEQ(register_classes) "\n" 105 ".popsection \n" 106 ); 107 #endif 108