// SPDX-License-Identifier: GPL-2.0#include <malloc.h>#include <string.h>#include <stdlib.h>#include <stdbool.h> #include "utils.h" #define MAX_LEN 8192#define MAX_OFFSET 16#define MIN_REDZONE 128#define BUFLEN (MAX_LEN+MAX_OFFSET+2*MIN_REDZONE)#define POISON 0xa5 #ifdef VMX_TEST#define VMX_COPY_THRESHOLD 3328#endif unsigned long COPY_LOOP(void *to, const void *from, unsigned long size); static void do_one(char *src, char *dst, unsigned long src_off,		   unsigned long dst_off, unsigned long len, void *redzone,		   void *fill){	char *srcp, *dstp;	unsigned long ret;	unsigned long i; 	srcp = src + MIN_REDZONE + src_off;	dstp = dst + MIN_REDZONE + dst_off; 	memset(src, POISON, BUFLEN);	memset(dst, POISON, BUFLEN);	memcpy(srcp, fill, len); 	ret = COPY_LOOP(dstp, srcp, len);	if (ret && ret != (unsigned long)dstp) {		printf("(%p,%p,%ld) returned %ld\n", dstp, srcp, len, ret);		abort();	} 	if (memcmp(dstp, srcp, len)) {		printf("(%p,%p,%ld) miscompare\n", dstp, srcp, len);		printf("src: ");		for (i = 0; i < len; i++)			printf("%02x ", srcp[i]);		printf("\ndst: ");		for (i = 0; i < len; i++)			printf("%02x ", dstp[i]);		printf("\n");		abort();	} 	if (memcmp(dst, redzone, dstp - dst)) {		printf("(%p,%p,%ld) redzone before corrupted\n",		       dstp, srcp, len);		abort();	} 	if (memcmp(dstp+len, redzone, dst+BUFLEN-(dstp+len))) {		printf("(%p,%p,%ld) redzone after corrupted\n",		       dstp, srcp, len);		abort();	}} int test_copy_loop(void){	char *src, *dst, *redzone, *fill;	unsigned long len, src_off, dst_off;	unsigned long i; 	src = memalign(BUFLEN, BUFLEN);	dst = memalign(BUFLEN, BUFLEN);	redzone = malloc(BUFLEN);	fill = malloc(BUFLEN); 	if (!src || !dst || !redzone || !fill) {		fprintf(stderr, "malloc failed\n");		exit(1);	} 	memset(redzone, POISON, BUFLEN); 	/* Fill with sequential bytes */	for (i = 0; i < BUFLEN; i++)		fill[i] = i & 0xff;#ifdef VMX_TEST	/* Force sizes above kernel VMX threshold (3328) */	for (len = VMX_COPY_THRESHOLD + 1; len < MAX_LEN; len++) {#else	for (len = 1; len < MAX_LEN; len++) {#endif		for (src_off = 0; src_off < MAX_OFFSET; src_off++) {			for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) {				do_one(src, dst, src_off, dst_off, len,				       redzone, fill);			}		}	} 	return 0;} int main(void){#ifdef VMX_TEST	/* Skip if Altivec not present */	SKIP_IF_MSG(!have_hwcap(PPC_FEATURE_HAS_ALTIVEC), "ALTIVEC not supported");#endif 	return test_harness(test_copy_loop, str(COPY_LOOP));}