| Albert ARIBAUD | 3ebd1cb | 2013-02-25 00:58:59 +0000 | [diff] [blame] | 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 | |
| Albert ARIBAUD | df84502 | 2013-06-11 14:17:32 +0200 | [diff] [blame] | 38 | char __bss_start[0] __attribute__((section(".__bss_start"))); |
| 39 | char __bss_end[0] __attribute__((section(".__bss_end"))); |
| Albert ARIBAUD | d026dec | 2013-06-11 14:17:33 +0200 | [diff] [blame^] | 40 | char __image_copy_start[0] __attribute__((section(".__image_copy_start"))); |
| 41 | char __image_copy_end[0] __attribute__((section(".__image_copy_end"))); |