| /* |
| * Copyright (C) 2017 Linaro, Ltd. <ard.biesheuvel@linaro.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| |
| #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_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) }, |
| #ifndef CONFIG_ARM64_ERRATUM_843419 |
| { "R_AARCH64_ADR_PREL_PG_HI21", relative_adrp, (u64)&sym64_rel }, |
| #endif |
| { "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"); |