1 /* 2 * Copyright 2013 Albert ARIBAUD <albert.u.boot@aribaud.net> 3 * 4 * See file CREDITS for list of people who contributed to this 5 * project. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 20 * MA 02111-1307 USA 21 */ 22 23 /** 24 * These two symbols are declared in a C file so that the linker 25 * uses R_ARM_RELATIVE relocation, rather than the R_ARM_ABS32 one 26 * it would use if the symbols were defined in the linker file. 27 * Using only R_ARM_RELATIVE relocation ensures that references to 28 * the symbols are correct after as well as before relocation. 29 * 30 * We need a 0-byte-size type for these symbols, and the compiler 31 * does not allow defining objects of C type 'void'. Using an empty 32 * struct is allowed by the compiler, but causes gcc versions 4.4 and 33 * below to complain about aliasing. Therefore we use the next best 34 * thing: zero-sized arrays, which are both 0-byte-size and exempt from 35 * aliasing warnings. 36 */ 37 38 char __bss_start[0] __attribute__((section(".__bss_start"))); 39 char __bss_end[0] __attribute__((section(".__bss_end"))); 40 char __image_copy_start[0] __attribute__((section(".__image_copy_start"))); 41 char __image_copy_end[0] __attribute__((section(".__image_copy_end"))); 42 char __rel_dyn_start[0] __attribute__((section(".__rel_dyn_start"))); 43 char __rel_dyn_end[0] __attribute__((section(".__rel_dyn_end"))); 44