tools/testing/selftests/powerpc/copyloops/validate.c

   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 unsigned long COPY_LOOP(void *to, const void *from, unsigned long size);
  16
  17 static void do_one(char *src, char *dst, unsigned long src_off,
  18                    unsigned long dst_off, unsigned long len, void *redzone,
  19                    void *fill)
  20 {
  21         char *srcp, *dstp;
  22         unsigned long ret;
  23         unsigned long i;
  24
  25         srcp = src + MIN_REDZONE + src_off;
  26         dstp = dst + MIN_REDZONE + dst_off;
  27
  28         memset(src, POISON, BUFLEN);
  29         memset(dst, POISON, BUFLEN);
  30         memcpy(srcp, fill, len);
  31
  32         ret = COPY_LOOP(dstp, srcp, len);
  33         if (ret && ret != (unsigned long)dstp) {
  34                 printf("(%p,%p,%ld) returned %ld\n", dstp, srcp, len, ret);
  35                 abort();
  36         }
  37
  38         if (memcmp(dstp, srcp, len)) {
  39                 printf("(%p,%p,%ld) miscompare\n", dstp, srcp, len);
  40                 printf("src: ");
  41                 for (i = 0; i < len; i++)
  42                         printf("%02x ", srcp[i]);
  43                 printf("\ndst: ");
  44                 for (i = 0; i < len; i++)
  45                         printf("%02x ", dstp[i]);
  46                 printf("\n");
  47                 abort();
  48         }
  49
  50         if (memcmp(dst, redzone, dstp - dst)) {
  51                 printf("(%p,%p,%ld) redzone before corrupted\n",
  52                        dstp, srcp, len);
  53                 abort();
  54         }
  55
  56         if (memcmp(dstp+len, redzone, dst+BUFLEN-(dstp+len))) {
  57                 printf("(%p,%p,%ld) redzone after corrupted\n",
  58                        dstp, srcp, len);
  59                 abort();
  60         }
  61 }
  62
  63 int test_copy_loop(void)
  64 {
  65         char *src, *dst, *redzone, *fill;
  66         unsigned long len, src_off, dst_off;
  67         unsigned long i;
  68
  69         src = memalign(BUFLEN, BUFLEN);
  70         dst = memalign(BUFLEN, BUFLEN);
  71         redzone = malloc(BUFLEN);
  72         fill = malloc(BUFLEN);
  73
  74         if (!src || !dst || !redzone || !fill) {
  75                 fprintf(stderr, "malloc failed\n");
  76                 exit(1);
  77         }
  78
  79         memset(redzone, POISON, BUFLEN);
  80
  81         /* Fill with sequential bytes */
  82         for (i = 0; i < BUFLEN; i++)
  83                 fill[i] = i & 0xff;
  84
  85         for (len = 1; len < MAX_LEN; len++) {
  86                 for (src_off = 0; src_off < MAX_OFFSET; src_off++) {
  87                         for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) {
  88                                 do_one(src, dst, src_off, dst_off, len,
  89                                        redzone, fill);
  90                         }
  91                 }
  92         }
  93
  94         return 0;
  95 }
  96
  97 int main(void)
  98 {
  99         return test_harness(test_copy_loop, str(COPY_LOOP));
 100 }