1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright 2013 Albert ARIBAUD <albert.u.boot@aribaud.net> 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /** 8*4882a593Smuzhiyun * These two symbols are declared in a C file so that the linker 9*4882a593Smuzhiyun * uses R_ARM_RELATIVE relocation, rather than the R_ARM_ABS32 one 10*4882a593Smuzhiyun * it would use if the symbols were defined in the linker file. 11*4882a593Smuzhiyun * Using only R_ARM_RELATIVE relocation ensures that references to 12*4882a593Smuzhiyun * the symbols are correct after as well as before relocation. 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun * We need a 0-byte-size type for these symbols, and the compiler 15*4882a593Smuzhiyun * does not allow defining objects of C type 'void'. Using an empty 16*4882a593Smuzhiyun * struct is allowed by the compiler, but causes gcc versions 4.4 and 17*4882a593Smuzhiyun * below to complain about aliasing. Therefore we use the next best 18*4882a593Smuzhiyun * thing: zero-sized arrays, which are both 0-byte-size and exempt from 19*4882a593Smuzhiyun * aliasing warnings. 20*4882a593Smuzhiyun */ 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun char __bss_start[0] __attribute__((section(".__bss_start"))); 23*4882a593Smuzhiyun char __bss_end[0] __attribute__((section(".__bss_end"))); 24*4882a593Smuzhiyun char __image_copy_start[0] __attribute__((section(".__image_copy_start"))); 25*4882a593Smuzhiyun char __image_copy_end[0] __attribute__((section(".__image_copy_end"))); 26*4882a593Smuzhiyun char __rel_dyn_start[0] __attribute__((section(".__rel_dyn_start"))); 27*4882a593Smuzhiyun char __rel_dyn_end[0] __attribute__((section(".__rel_dyn_end"))); 28*4882a593Smuzhiyun char __secure_start[0] __attribute__((section(".__secure_start"))); 29*4882a593Smuzhiyun char __secure_end[0] __attribute__((section(".__secure_end"))); 30*4882a593Smuzhiyun char __secure_stack_start[0] __attribute__((section(".__secure_stack_start"))); 31*4882a593Smuzhiyun char __secure_stack_end[0] __attribute__((section(".__secure_stack_end"))); 32*4882a593Smuzhiyun char __efi_runtime_start[0] __attribute__((section(".__efi_runtime_start"))); 33*4882a593Smuzhiyun char __efi_runtime_stop[0] __attribute__((section(".__efi_runtime_stop"))); 34*4882a593Smuzhiyun char __efi_runtime_rel_start[0] __attribute__((section(".__efi_runtime_rel_start"))); 35*4882a593Smuzhiyun char __efi_runtime_rel_stop[0] __attribute__((section(".__efi_runtime_rel_stop"))); 36*4882a593Smuzhiyun char _end[0] __attribute__((section(".__end"))); 37