// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2017 Linaro, Ltd. <ard.biesheuvel@linaro.org>
*/
#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_adrp_far(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) },
{ "R_AARCH64_ADR_PREL_PG_HI21" , relative_adrp, (u64)&sym64_rel },
{ "R_AARCH64_ADR_PREL_PG_HI21" , relative_adrp_far, (u64)&memstart_addr },
{ "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 __init 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 __exit reloc_test_exit(void )
{
}
module_init(reloc_test_init);
module_exit(reloc_test_exit);
MODULE_DESCRIPTION("Relocation testing module" );
MODULE_LICENSE("GPL v2" );
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