1 // SPDX-License-Identifier: GPL-2.0 2 #include <malloc.h> 3 #include <string.h> 4 #include <stdlib.h> 5 #include <stdbool.h> 6 7 #include "utils.h" 8 9 #define MAX_LEN 8192 10 #define MAX_OFFSET 16 11 #define MIN_REDZONE 128 12 #define BUFLEN (MAX_LEN+MAX_OFFSET+2*MIN_REDZONE) 13 #define POISON 0xa5 14 15 #ifdef VMX_TEST 16 #define VMX_COPY_THRESHOLD 3328 17 #endif 18 19 unsigned long COPY_LOOP(void *to, const void *from, unsigned long size); 20 21 static void do_one(char *src, char *dst, unsigned long src_off, 22 unsigned long dst_off, unsigned long len, void *redzone, 23 void *fill) 24 { 25 char *srcp, *dstp; 26 unsigned long ret; 27 unsigned long i; 28 29 srcp = src + MIN_REDZONE + src_off; 30 dstp = dst + MIN_REDZONE + dst_off; 31 32 memset(src, POISON, BUFLEN); 33 memset(dst, POISON, BUFLEN); 34 memcpy(srcp, fill, len); 35 36 ret = COPY_LOOP(dstp, srcp, len); 37 if (ret && ret != (unsigned long)dstp) { 38 printf("(%p,%p,%ld) returned %ld\n", dstp, srcp, len, ret); 39 abort(); 40 } 41 42 if (memcmp(dstp, srcp, len)) { 43 printf("(%p,%p,%ld) miscompare\n", dstp, srcp, len); 44 printf("src: "); 45 for (i = 0; i < len; i++) 46 printf("%02x ", srcp[i]); 47 printf("\ndst: "); 48 for (i = 0; i < len; i++) 49 printf("%02x ", dstp[i]); 50 printf("\n"); 51 abort(); 52 } 53 54 if (memcmp(dst, redzone, dstp - dst)) { 55 printf("(%p,%p,%ld) redzone before corrupted\n", 56 dstp, srcp, len); 57 abort(); 58 } 59 60 if (memcmp(dstp+len, redzone, dst+BUFLEN-(dstp+len))) { 61 printf("(%p,%p,%ld) redzone after corrupted\n", 62 dstp, srcp, len); 63 abort(); 64 } 65 } 66 67 int test_copy_loop(void) 68 { 69 char *src, *dst, *redzone, *fill; 70 unsigned long len, src_off, dst_off; 71 unsigned long i; 72 73 src = memalign(BUFLEN, BUFLEN); 74 dst = memalign(BUFLEN, BUFLEN); 75 redzone = malloc(BUFLEN); 76 fill = malloc(BUFLEN); 77 78 if (!src || !dst || !redzone || !fill) { 79 fprintf(stderr, "malloc failed\n"); 80 exit(1); 81 } 82 83 memset(redzone, POISON, BUFLEN); 84 85 /* Fill with sequential bytes */ 86 for (i = 0; i < BUFLEN; i++) 87 fill[i] = i & 0xff; 88 #ifdef VMX_TEST 89 /* Force sizes above kernel VMX threshold (3328) */ 90 for (len = VMX_COPY_THRESHOLD + 1; len < MAX_LEN; len++) { 91 #else 92 for (len = 1; len < MAX_LEN; len++) { 93 #endif 94 for (src_off = 0; src_off < MAX_OFFSET; src_off++) { 95 for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) { 96 do_one(src, dst, src_off, dst_off, len, 97 redzone, fill); 98 } 99 } 100 } 101 102 return 0; 103 } 104 105 int main(void) 106 { 107 #ifdef VMX_TEST 108 /* Skip if Altivec not present */ 109 SKIP_IF_MSG(!have_hwcap(PPC_FEATURE_HAS_ALTIVEC), "ALTIVEC not supported"); 110 #endif 111 112 return test_harness(test_copy_loop, str(COPY_LOOP)); 113 } 114