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 /* 34 * On some architectures and toolchains we may need to call the .dtors. 35 * These are called in the order they are in the ELF file. 36 */ 37 #ifdef HAVE_CTORS 38 static void __do_global_dtors_aux(void) __used; 39 40 crt_func __CTOR_LIST__[] __section(".ctors") __hidden = { 41 (crt_func)-1 42 }; 43 crt_func __DTOR_LIST__[] __section(".dtors") __hidden = { 44 (crt_func)-1 45 }; 46 47 static void 48 __do_global_dtors_aux(void) 49 { 50 crt_func fn; 51 int n; 52 53 for (n = 1;; n++) { 54 fn = __DTOR_LIST__[n]; 55 if (fn == (crt_func)0 || fn == (crt_func)-1) 56 break; 57 fn(); 58 } 59 } 60 61 asm ( 62 ".pushsection .fini \n" 63 "\t" INIT_CALL_SEQ(__do_global_dtors_aux) "\n" 64 ".popsection \n" 65 ); 66 #endif 67 68 /* 69 * Handler for gcj. These provide a _Jv_RegisterClasses function and fill 70 * out the .jcr section. We just need to call this function with a pointer 71 * to the appropriate section. 72 */ 73 extern void _Jv_RegisterClasses(void *) __weak_symbol; 74 static void register_classes(void) __used; 75 76 crt_func __JCR_LIST__[] __section(".jcr") __used __hidden = { }; 77 78 #ifndef CTORS_CONSTRUCTORS 79 __attribute__((constructor)) 80 #endif 81 static void 82 register_classes(void) 83 { 84 85 if (_Jv_RegisterClasses != NULL && __JCR_LIST__[0] != 0) 86 _Jv_RegisterClasses(__JCR_LIST__); 87 } 88 89 /* 90 * We can't use constructors when they use the .ctors section as they may be 91 * placed before __CTOR_LIST__. 92 */ 93 #ifdef CTORS_CONSTRUCTORS 94 asm ( 95 ".pushsection .init \n" 96 "\t" INIT_CALL_SEQ(register_classes) "\n" 97 ".popsection \n" 98 ); 99 #endif 100