cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

reloc_test_core.c (2276B)

      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
      8int 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
     17SET_ABS(sym64_abs, SYM64_ABS_VAL);
     18SET_ABS(sym32_abs, SYM32_ABS_VAL);
     19SET_ABS(sym16_abs, SYM16_ABS_VAL);
     20
     21asmlinkage u64 absolute_data64(void);
     22asmlinkage u64 absolute_data32(void);
     23asmlinkage u64 absolute_data16(void);
     24asmlinkage u64 signed_movw(void);
     25asmlinkage u64 unsigned_movw(void);
     26asmlinkage u64 relative_adrp(void);
     27asmlinkage u64 relative_adrp_far(void);
     28asmlinkage u64 relative_adr(void);
     29asmlinkage u64 relative_data64(void);
     30asmlinkage u64 relative_data32(void);
     31asmlinkage u64 relative_data16(void);
     32
     33static 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
     51static int 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
     70static void reloc_test_exit(void)
     71{
     72}
     73
     74module_init(reloc_test_init);
     75module_exit(reloc_test_exit);
     76
     77MODULE_LICENSE("GPL v2");