22d651dcef
Turn Anton's memcpy / copy_tofrom_user test into something that can live in tools/testing/selftests. It requires one turd in arch/powerpc/lib/memcpy_64.S, but it's pretty harmless IMHO. We are sailing very close to the wind with the feature macros. We define them to nothing, which currently means we get a few extra nops and include the unaligned calls. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
#include <malloc.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include "../utils.h"
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#define MAX_LEN 8192
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#define MAX_OFFSET 16
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#define MIN_REDZONE 128
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#define BUFLEN (MAX_LEN+MAX_OFFSET+2*MIN_REDZONE)
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#define POISON 0xa5
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unsigned long COPY_LOOP(void *to, const void *from, unsigned long size);
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static void do_one(char *src, char *dst, unsigned long src_off,
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unsigned long dst_off, unsigned long len, void *redzone,
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void *fill)
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{
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char *srcp, *dstp;
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unsigned long ret;
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unsigned long i;
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srcp = src + MIN_REDZONE + src_off;
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dstp = dst + MIN_REDZONE + dst_off;
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memset(src, POISON, BUFLEN);
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memset(dst, POISON, BUFLEN);
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memcpy(srcp, fill, len);
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ret = COPY_LOOP(dstp, srcp, len);
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if (ret && ret != (unsigned long)dstp) {
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printf("(%p,%p,%ld) returned %ld\n", dstp, srcp, len, ret);
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abort();
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}
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if (memcmp(dstp, srcp, len)) {
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printf("(%p,%p,%ld) miscompare\n", dstp, srcp, len);
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printf("src: ");
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for (i = 0; i < len; i++)
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printf("%02x ", srcp[i]);
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printf("\ndst: ");
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for (i = 0; i < len; i++)
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printf("%02x ", dstp[i]);
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printf("\n");
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abort();
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}
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if (memcmp(dst, redzone, dstp - dst)) {
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printf("(%p,%p,%ld) redzone before corrupted\n",
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dstp, srcp, len);
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abort();
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}
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if (memcmp(dstp+len, redzone, dst+BUFLEN-(dstp+len))) {
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printf("(%p,%p,%ld) redzone after corrupted\n",
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dstp, srcp, len);
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abort();
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}
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}
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int test_copy_loop(void)
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{
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char *src, *dst, *redzone, *fill;
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unsigned long len, src_off, dst_off;
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unsigned long i;
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src = memalign(BUFLEN, BUFLEN);
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dst = memalign(BUFLEN, BUFLEN);
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redzone = malloc(BUFLEN);
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fill = malloc(BUFLEN);
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if (!src || !dst || !redzone || !fill) {
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fprintf(stderr, "malloc failed\n");
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exit(1);
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}
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memset(redzone, POISON, BUFLEN);
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/* Fill with sequential bytes */
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for (i = 0; i < BUFLEN; i++)
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fill[i] = i & 0xff;
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for (len = 1; len < MAX_LEN; len++) {
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for (src_off = 0; src_off < MAX_OFFSET; src_off++) {
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for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) {
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do_one(src, dst, src_off, dst_off, len,
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redzone, fill);
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}
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}
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}
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return 0;
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}
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int main(void)
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{
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return test_harness(test_copy_loop, str(COPY_LOOP));
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}
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