/* * Copyright (c) 2018 CZ.NIC, z.s.p.o. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "../private/libc.h" /* * We shouldn't be accessing these symbols directly from libc, * since it would create unwanted relocations in shared library * code. Instead, we refer to them here, in a file that's always * statically linked to the main executable, and write their values * to a special structure that resides in libc. */ extern init_array_entry_t __preinit_array_start[] __attribute__((weak)); extern init_array_entry_t __preinit_array_end[] __attribute__((weak)); extern init_array_entry_t __init_array_start[] __attribute__((weak)); extern init_array_entry_t __init_array_end[] __attribute__((weak)); extern fini_array_entry_t __fini_array_start[] __attribute__((weak)); extern fini_array_entry_t __fini_array_end[] __attribute__((weak)); extern int main(int, char *[]); extern unsigned char __executable_start[]; extern unsigned char _end[]; /* __c_start is only called from _start in assembly. */ void __c_start(void *); void __c_start(void *pcb) { __progsymbols = (progsymbols_t) { .main = main, .elfstart = __executable_start, .end = _end, .preinit_array = __preinit_array_start, .preinit_array_len = __preinit_array_end - __preinit_array_start, .init_array = __init_array_start, .init_array_len = __init_array_end - __init_array_start, .fini_array = __fini_array_start, .fini_array_len = __fini_array_end - __fini_array_start, }; __libc_main(pcb); }