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Albert ARIBAUD3ebd1cb2013-02-25 00:58:59 +00001/*
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
Albert ARIBAUDdf845022013-06-11 14:17:32 +020038char __bss_start[0] __attribute__((section(".__bss_start")));
39char __bss_end[0] __attribute__((section(".__bss_end")));
Albert ARIBAUDd026dec2013-06-11 14:17:33 +020040char __image_copy_start[0] __attribute__((section(".__image_copy_start")));
41char __image_copy_end[0] __attribute__((section(".__image_copy_end")));