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