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 | |