// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2017 Linaro, Ltd. <ard.biesheuvel@linaro.org> */ #include <linux/module.h> int sym64_rel; #define SYM64_ABS_VAL 0xffff880000cccccc #define SYM32_ABS_VAL 0xf800cccc #define SYM16_ABS_VAL 0xf8cc #define __SET_ABS(name, val) asm(".globl " #name "; .set "#name ", " #val) #define SET_ABS(name, val) __SET_ABS(name, val) SET_ABS(sym64_abs, SYM64_ABS_VAL); SET_ABS(sym32_abs, SYM32_ABS_VAL); SET_ABS(sym16_abs, SYM16_ABS_VAL); asmlinkage u64 absolute_data64(void); asmlinkage u64 absolute_data32(void); asmlinkage u64 absolute_data16(void); asmlinkage u64 signed_movw(void); asmlinkage u64 unsigned_movw(void); asmlinkage u64 relative_adrp(void); asmlinkage u64 relative_adrp_far(void); asmlinkage u64 relative_adr(void); asmlinkage u64 relative_data64(void); asmlinkage u64 relative_data32(void); asmlinkage u64 relative_data16(void); static struct { char name[32]; u64 (*f)(void); u64 expect; } const funcs[] = { { "R_AARCH64_ABS64", absolute_data64, UL(SYM64_ABS_VAL) }, { "R_AARCH64_ABS32", absolute_data32, UL(SYM32_ABS_VAL) }, { "R_AARCH64_ABS16", absolute_data16, UL(SYM16_ABS_VAL) }, { "R_AARCH64_MOVW_SABS_Gn", signed_movw, UL(SYM64_ABS_VAL) }, { "R_AARCH64_MOVW_UABS_Gn", unsigned_movw, UL(SYM64_ABS_VAL) }, { "R_AARCH64_ADR_PREL_PG_HI21", relative_adrp, (u64)&sym64_rel }, { "R_AARCH64_ADR_PREL_PG_HI21", relative_adrp_far, (u64)&memstart_addr }, { "R_AARCH64_ADR_PREL_LO21", relative_adr, (u64)&sym64_rel }, { "R_AARCH64_PREL64", relative_data64, (u64)&sym64_rel }, { "R_AARCH64_PREL32", relative_data32, (u64)&sym64_rel }, { "R_AARCH64_PREL16", relative_data16, (u64)&sym64_rel }, }; static int reloc_test_init(void) { int i; pr_info("Relocation test:\n"); pr_info("-------------------------------------------------------\n"); for (i = 0; i < ARRAY_SIZE(funcs); i++) { u64 ret = funcs[i].f(); pr_info("%-31s 0x%016llx %s\n", funcs[i].name, ret, ret == funcs[i].expect ? "pass" : "fail"); if (ret != funcs[i].expect) pr_err("Relocation failed, expected 0x%016llx, not 0x%016llx\n", funcs[i].expect, ret); } return 0; } static void reloc_test_exit(void) { } module_init(reloc_test_init); module_exit(reloc_test_exit); MODULE_LICENSE("GPL v2");