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arch/arm64/kernel/reloc_test_core.c
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/*
* 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:
");
pr_info("-------------------------------------------------------
");
for (i = 0; i < ARRAY_SIZE(funcs); i++) {
u64 ret = funcs[i].f();
pr_info("%-31s 0x%016llx %s
", 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
",
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");
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