| 1 | /* |
| 2 | * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. |
| 3 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 4 | */ |
| 5 | |
| 6 | /* |
| 7 | * Test that unaligned scalar loads raise SIGBUS. |
| 8 | */ |
| 9 | |
| 10 | #include <stdlib.h> |
| 11 | #include <stdio.h> |
| 12 | #include <stdint.h> |
| 13 | #include <stdbool.h> |
| 14 | #include <setjmp.h> |
| 15 | #include <signal.h> |
| 16 | |
| 17 | int err; |
| 18 | |
| 19 | #include "hex_test.h" |
| 20 | |
| 21 | static bool sigbus_caught; |
| 22 | static sigjmp_buf jmp_env; |
| 23 | static uint64_t buf[2] = { 0, 0 }; |
| 24 | |
| 25 | static void sigbus_handler(int sig, siginfo_t *info, void *puc) |
| 26 | { |
| 27 | check32(sig, SIGBUS); |
| 28 | sigbus_caught = true; |
| 29 | siglongjmp(jmp_env, 1); |
| 30 | } |
| 31 | |
| 32 | static void test_unaligned_load(int size, int offset) |
| 33 | { |
| 34 | char *p = (char *)buf + offset; |
| 35 | uint32_t dummy32; |
| 36 | uint64_t dummy64; |
| 37 | |
| 38 | sigbus_caught = false; |
| 39 | if (sigsetjmp(jmp_env, 1) == 0) { |
| 40 | switch (size) { |
| 41 | case 2: |
| 42 | asm volatile("%[dst] = memh(%[src])\n\t" |
| 43 | : [dst] "=r"(dummy32) : [src] "r"(p) : "memory"); |
| 44 | break; |
| 45 | case 4: |
| 46 | asm volatile("%[dst] = memw(%[src])\n\t" |
| 47 | : [dst] "=r"(dummy32) : [src] "r"(p) : "memory"); |
| 48 | break; |
| 49 | case 8: |
| 50 | asm volatile("%[dst] = memd(%[src])\n\t" |
| 51 | : [dst] "=r"(dummy64) : [src] "r"(p) : "memory"); |
| 52 | break; |
| 53 | default: |
| 54 | abort(); |
| 55 | } |
| 56 | } |
| 57 | check32(sigbus_caught, true); |
| 58 | } |
| 59 | |
| 60 | static void test_unaligned_store(int size, int offset) |
| 61 | { |
| 62 | char *p = (char *)buf + offset; |
| 63 | uint32_t val32 = 0x11223344; |
| 64 | uint64_t val64 = 0x1122334455667788ULL; |
| 65 | |
| 66 | sigbus_caught = false; |
| 67 | if (sigsetjmp(jmp_env, 1) == 0) { |
| 68 | switch (size) { |
| 69 | case 2: |
| 70 | asm volatile("memh(%[addr]) = %[val]\n\t" |
| 71 | : : [addr] "r"(p), [val] "r"(val32) : "memory"); |
| 72 | break; |
| 73 | case 4: |
| 74 | asm volatile("memw(%[addr]) = %[val]\n\t" |
| 75 | : : [addr] "r"(p), [val] "r"(val32) : "memory"); |
| 76 | break; |
| 77 | case 8: |
| 78 | asm volatile("memd(%[addr]) = %[val]\n\t" |
| 79 | : : [addr] "r"(p), [val] "r"(val64) : "memory"); |
| 80 | break; |
| 81 | default: |
| 82 | abort(); |
| 83 | } |
| 84 | } |
| 85 | check32(sigbus_caught, true); |
| 86 | } |
| 87 | |
| 88 | int main() |
| 89 | { |
| 90 | struct sigaction act; |
| 91 | |
| 92 | act.sa_sigaction = sigbus_handler; |
| 93 | sigemptyset(&act.sa_mask); |
| 94 | act.sa_flags = SA_SIGINFO; |
| 95 | chk_error(sigaction(SIGBUS, &act, NULL)); |
| 96 | |
| 97 | test_unaligned_load(2, 1); |
| 98 | test_unaligned_load(4, 1); |
| 99 | test_unaligned_load(4, 2); |
| 100 | test_unaligned_load(4, 3); |
| 101 | test_unaligned_load(8, 1); |
| 102 | test_unaligned_load(8, 4); |
| 103 | |
| 104 | test_unaligned_store(2, 1); |
| 105 | test_unaligned_store(4, 1); |
| 106 | test_unaligned_store(4, 2); |
| 107 | test_unaligned_store(4, 3); |
| 108 | test_unaligned_store(8, 1); |
| 109 | test_unaligned_store(8, 4); |
| 110 | |
| 111 | act.sa_handler = SIG_DFL; |
| 112 | sigemptyset(&act.sa_mask); |
| 113 | act.sa_flags = 0; |
| 114 | chk_error(sigaction(SIGBUS, &act, NULL)); |
| 115 | |
| 116 | puts(err ? "FAIL" : "PASS"); |
| 117 | return err ? EXIT_FAILURE : EXIT_SUCCESS; |
| 118 | } |