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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | /* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2020 ARM Limited */
#ifndef _MTE_COMMON_UTIL_H
#define _MTE_COMMON_UTIL_H
#include <signal.h>
#include <stdbool.h>
#include <stdlib.h>
#include <sys/auxv.h>
#include <sys/mman.h>
#include <sys/prctl.h>
#include "mte_def.h"
#include "kselftest.h"
enum mte_mem_type {
USE_MALLOC,
USE_MMAP,
USE_MPROTECT,
};
enum mte_mode {
MTE_NONE_ERR,
MTE_SYNC_ERR,
MTE_ASYNC_ERR,
};
struct mte_fault_cxt {
/* Address start which triggers mte tag fault */
unsigned long trig_addr;
/* Address range for mte tag fault and negative value means underflow */
ssize_t trig_range;
/* siginfo si code */
unsigned long trig_si_code;
/* Flag to denote if correct fault caught */
bool fault_valid;
};
extern struct mte_fault_cxt cur_mte_cxt;
/* MTE utility functions */
void mte_default_handler(int signum, siginfo_t *si, void *uc);
void mte_register_signal(int signal, void (*handler)(int, siginfo_t *, void *));
void mte_wait_after_trig(void);
void *mte_allocate_memory(size_t size, int mem_type, int mapping, bool tags);
void *mte_allocate_memory_tag_range(size_t size, int mem_type, int mapping,
size_t range_before, size_t range_after);
void *mte_allocate_file_memory(size_t size, int mem_type, int mapping,
bool tags, int fd);
void *mte_allocate_file_memory_tag_range(size_t size, int mem_type, int mapping,
size_t range_before, size_t range_after, int fd);
void mte_free_memory(void *ptr, size_t size, int mem_type, bool tags);
void mte_free_memory_tag_range(void *ptr, size_t size, int mem_type,
size_t range_before, size_t range_after);
void *mte_insert_tags(void *ptr, size_t size);
void mte_clear_tags(void *ptr, size_t size);
int mte_default_setup(void);
void mte_restore_setup(void);
int mte_switch_mode(int mte_option, unsigned long incl_mask);
void mte_initialize_current_context(int mode, uintptr_t ptr, ssize_t range);
/* Common utility functions */
int create_temp_file(void);
/* Assembly MTE utility functions */
void *mte_insert_random_tag(void *ptr);
void *mte_insert_new_tag(void *ptr);
void *mte_get_tag_address(void *ptr);
void mte_set_tag_address_range(void *ptr, int range);
void mte_clear_tag_address_range(void *ptr, int range);
void mte_disable_pstate_tco(void);
void mte_enable_pstate_tco(void);
unsigned int mte_get_pstate_tco(void);
/* Test framework static inline functions/macros */
static inline void evaluate_test(int err, const char *msg)
{
if (err == KSFT_PASS)
ksft_test_result_pass(msg);
else if (err == KSFT_FAIL)
ksft_test_result_fail(msg);
}
static inline int check_allocated_memory(void *ptr, size_t size,
int mem_type, bool tags)
{
if (ptr == NULL) {
ksft_print_msg("FAIL: memory allocation\n");
return KSFT_FAIL;
}
if (tags && !MT_FETCH_TAG((uintptr_t)ptr)) {
ksft_print_msg("FAIL: tag not found at addr(%p)\n", ptr);
mte_free_memory((void *)ptr, size, mem_type, false);
return KSFT_FAIL;
}
return KSFT_PASS;
}
static inline int check_allocated_memory_range(void *ptr, size_t size, int mem_type,
size_t range_before, size_t range_after)
{
if (ptr == NULL) {
ksft_print_msg("FAIL: memory allocation\n");
return KSFT_FAIL;
}
if (!MT_FETCH_TAG((uintptr_t)ptr)) {
ksft_print_msg("FAIL: tag not found at addr(%p)\n", ptr);
mte_free_memory_tag_range((void *)ptr, size, mem_type, range_before,
range_after);
return KSFT_FAIL;
}
return KSFT_PASS;
}
#endif /* _MTE_COMMON_UTIL_H */
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