1 /* 2 * strcpy test. 3 * 4 * Copyright (c) 2019-2020, Arm Limited. 5 * SPDX-License-Identifier: MIT 6 */ 7 8 #include <stdint.h> 9 #include <stdio.h> 10 #include <stdlib.h> 11 #include <string.h> 12 #include "mte.h" 13 #include "stringlib.h" 14 #include "stringtest.h" 15 16 #define F(x, mte) {#x, x, mte}, 17 18 static const struct fun 19 { 20 const char *name; 21 char *(*fun) (char *dest, const char *src); 22 int test_mte; 23 } funtab[] = { 24 // clang-format off 25 F(strcpy, 0) 26 #if __aarch64__ 27 F(__strcpy_aarch64, 0) 28 F(__strcpy_aarch64_mte, 1) 29 # if __ARM_FEATURE_SVE 30 F(__strcpy_aarch64_sve, 1) 31 # endif 32 #elif __arm__ && defined (__thumb2__) && !defined (__thumb__) 33 F(__strcpy_arm, 0) 34 #endif 35 {0, 0, 0} 36 // clang-format on 37 }; 38 #undef F 39 40 #define ALIGN 32 41 #define LEN 512 42 static char *dbuf; 43 static char *sbuf; 44 static char wbuf[LEN + 3 * ALIGN]; 45 46 static void * 47 alignup (void *p) 48 { 49 return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN); 50 } 51 52 static void 53 test (const struct fun *fun, int dalign, int salign, int len) 54 { 55 char *src = alignup (sbuf); 56 char *dst = alignup (dbuf); 57 char *want = wbuf; 58 char *s = src + salign; 59 char *d = dst + dalign; 60 char *w = want + dalign; 61 void *p; 62 int i; 63 64 if (err_count >= ERR_LIMIT) 65 return; 66 if (len > LEN || dalign >= ALIGN || salign >= ALIGN) 67 abort (); 68 for (i = 0; i < len + ALIGN; i++) 69 { 70 src[i] = '?'; 71 want[i] = dst[i] = '*'; 72 } 73 for (int i = 0; src + i < s; i++) 74 src[i] = 0; 75 for (int i = 1; i <= ALIGN; i++) 76 s[len + i] = (len + salign) & 1 ? 1 : 0; 77 for (i = 0; i < len; i++) 78 s[i] = w[i] = 'a' + (i & 31); 79 s[len] = w[len] = '\0'; 80 81 s = tag_buffer (s, len + 1, fun->test_mte); 82 d = tag_buffer (d, len + 1, fun->test_mte); 83 p = fun->fun (d, s); 84 untag_buffer (s, len + 1, fun->test_mte); 85 untag_buffer (d, len + 1, fun->test_mte); 86 87 if (p != d) 88 ERR ("%s (%p,..) returned %p\n", fun->name, d, p); 89 90 for (i = 0; i < len + ALIGN; i++) 91 { 92 if (dst[i] != want[i]) 93 { 94 ERR ("%s (align %d, align %d, %d) failed\n", 95 fun->name, dalign, salign, len); 96 quoteat ("got", dst, len + ALIGN, i); 97 quoteat ("want", want, len + ALIGN, i); 98 break; 99 } 100 } 101 } 102 103 int 104 main (void) 105 { 106 sbuf = mte_mmap (LEN + 3 * ALIGN); 107 dbuf = mte_mmap (LEN + 3 * ALIGN); 108 int r = 0; 109 for (int i = 0; funtab[i].name; i++) 110 { 111 err_count = 0; 112 for (int d = 0; d < ALIGN; d++) 113 for (int s = 0; s < ALIGN; s++) 114 for (int n = 0; n < LEN; n++) 115 test (funtab + i, d, s, n); 116 117 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS"; 118 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name); 119 if (err_count) 120 r = -1; 121 } 122 return r; 123 } 124