1 /* 2 * Copyright 2013 Albert ARIBAUD <albert.u.boot@aribaud.net> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 /** 8 * These two symbols are declared in a C file so that the linker 9 * uses R_ARM_RELATIVE relocation, rather than the R_ARM_ABS32 one 10 * it would use if the symbols were defined in the linker file. 11 * Using only R_ARM_RELATIVE relocation ensures that references to 12 * the symbols are correct after as well as before relocation. 13 * 14 * We need a 0-byte-size type for these symbols, and the compiler 15 * does not allow defining objects of C type 'void'. Using an empty 16 * struct is allowed by the compiler, but causes gcc versions 4.4 and 17 * below to complain about aliasing. Therefore we use the next best 18 * thing: zero-sized arrays, which are both 0-byte-size and exempt from 19 * aliasing warnings. 20 */ 21 22 char __bss_start[0] __attribute__((section(".__bss_start"))); 23 char __bss_end[0] __attribute__((section(".__bss_end"))); 24 char __image_copy_start[0] __attribute__((section(".__image_copy_start"))); 25 char __image_copy_end[0] __attribute__((section(".__image_copy_end"))); 26 char __rel_dyn_start[0] __attribute__((section(".__rel_dyn_start"))); 27 char __rel_dyn_end[0] __attribute__((section(".__rel_dyn_end"))); 28 char _end[0] __attribute__((section(".__end"))); 29