1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2017 Linaro, Ltd. <ard.biesheuvel@linaro.org> 4 */ 5 6 #include <linux/module.h> 7 8 int sym64_rel; 9 10 #define SYM64_ABS_VAL 0xffff880000cccccc 11 #define SYM32_ABS_VAL 0xf800cccc 12 #define SYM16_ABS_VAL 0xf8cc 13 14 #define __SET_ABS(name, val) asm(".globl " #name "; .set "#name ", " #val) 15 #define SET_ABS(name, val) __SET_ABS(name, val) 16 17 SET_ABS(sym64_abs, SYM64_ABS_VAL); 18 SET_ABS(sym32_abs, SYM32_ABS_VAL); 19 SET_ABS(sym16_abs, SYM16_ABS_VAL); 20 21 asmlinkage u64 absolute_data64(void); 22 asmlinkage u64 absolute_data32(void); 23 asmlinkage u64 absolute_data16(void); 24 asmlinkage u64 signed_movw(void); 25 asmlinkage u64 unsigned_movw(void); 26 asmlinkage u64 relative_adrp(void); 27 asmlinkage u64 relative_adrp_far(void); 28 asmlinkage u64 relative_adr(void); 29 asmlinkage u64 relative_data64(void); 30 asmlinkage u64 relative_data32(void); 31 asmlinkage u64 relative_data16(void); 32 33 static struct { 34 char name[32]; 35 u64 (*f)(void); 36 u64 expect; 37 } const funcs[] = { 38 { "R_AARCH64_ABS64", absolute_data64, UL(SYM64_ABS_VAL) }, 39 { "R_AARCH64_ABS32", absolute_data32, UL(SYM32_ABS_VAL) }, 40 { "R_AARCH64_ABS16", absolute_data16, UL(SYM16_ABS_VAL) }, 41 { "R_AARCH64_MOVW_SABS_Gn", signed_movw, UL(SYM64_ABS_VAL) }, 42 { "R_AARCH64_MOVW_UABS_Gn", unsigned_movw, UL(SYM64_ABS_VAL) }, 43 { "R_AARCH64_ADR_PREL_PG_HI21", relative_adrp, (u64)&sym64_rel }, 44 { "R_AARCH64_ADR_PREL_PG_HI21", relative_adrp_far, (u64)&memstart_addr }, 45 { "R_AARCH64_ADR_PREL_LO21", relative_adr, (u64)&sym64_rel }, 46 { "R_AARCH64_PREL64", relative_data64, (u64)&sym64_rel }, 47 { "R_AARCH64_PREL32", relative_data32, (u64)&sym64_rel }, 48 { "R_AARCH64_PREL16", relative_data16, (u64)&sym64_rel }, 49 }; 50 51 static int __init reloc_test_init(void) 52 { 53 int i; 54 55 pr_info("Relocation test:\n"); 56 pr_info("-------------------------------------------------------\n"); 57 58 for (i = 0; i < ARRAY_SIZE(funcs); i++) { 59 u64 ret = funcs[i].f(); 60 61 pr_info("%-31s 0x%016llx %s\n", funcs[i].name, ret, 62 ret == funcs[i].expect ? "pass" : "fail"); 63 if (ret != funcs[i].expect) 64 pr_err("Relocation failed, expected 0x%016llx, not 0x%016llx\n", 65 funcs[i].expect, ret); 66 } 67 return 0; 68 } 69 70 static void __exit reloc_test_exit(void) 71 { 72 } 73 74 module_init(reloc_test_init); 75 module_exit(reloc_test_exit); 76 77 MODULE_LICENSE("GPL v2"); 78