Attachment 182941 Details for Bug 254208 – Simple test program to map and read arbitrary mfns

Simple test program to map and read arbitrary mfns

crash249409.c (text/x-csrc), 1.18 KB, created by Markus Armbruster on 2007-08-31 08:07:46 UTC

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Creator: Markus Armbruster

Created: 2007-08-31 08:07:46 UTC

Size: 1.18 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <sys/mman.h>
>#include <xenctrl.h>
>
>static void
>dump_page(char *p)
>{
>#ifdef VERBOSE
>#define SHOW 4096
>#else
>#define SHOW 16
>#endif
>	int i;
>
>	printf("%p", p);
>	for (i = 0; i < SHOW; i++)
>		printf(" %02x", p[i]);
>	printf("\n");
>}
>
>int
>main(int argc, char *argv[])
>{
>	int n, i, xc;
>	unsigned domid;
>	unsigned long *mfn;
>	char *p;
>
>	if (argc < 3) {
>		fprintf(stderr, "Usage: %s domid mfn...\n", argv[0]);
>		exit(1);
>	}
>	domid = strtoul(argv[1], NULL, 0);
>	n = argc - 2;
>	mfn = malloc(n * sizeof(*mfn));
>	for (i = 0; i < n; i++)
>		mfn[i] = strtoul(argv[i + 2], NULL, 0);
>
>	xc = xc_interface_open();
>	if (xc == -1) {
>		perror("open");
>		exit(1);
>	}
>
>	for (i = 0; i < n; i++) {
>		printf("mfn %lu %lx\n", mfn[i], mfn[i]);
>		p = xc_map_foreign_range(xc, domid, 4096,
>					 PROT_READ | PROT_WRITE, mfn[i]);
>		if (!p) {
>			perror("map");
>			continue;
>		}
>		dump_page(p);
>		munmap(p, 4096);
>	}
>
>	printf("all mfns\n");
>	p = xc_map_foreign_batch(xc, domid, PROT_READ | PROT_WRITE, mfn, n);
>	if (!p) {
>		perror("map");
>		exit(1);
>	}
>	for (i = 0; i < n; i++) {
>		printf("mfn %lu %lx\n", mfn[i], mfn[i]);
>		dump_page(p + i * 4096);
>	}
>	munmap(p, n * 4096);
>	free(mfn);
>	return 0;
>}

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Attachments on bug 254208: 182941 | 217751