perf-read-vdso.c

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// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <string.h>

#define VDSO__MAP_NAME "[vdso]"

/*
 * Include definition of find_vdso_map() also used in util/vdso.c for
 * building perf.
 */
#include "util/find-vdso-map.c"

int main(void)
{
    void *start, *end;
    size_t size, written;

    if (find_vdso_map(&start, &end))
        return 1;

    size = end - start;

    while (size) {
        written = fwrite(start, 1, size, stdout);
        if (!written)
            return 1;
        start += written;
        size -= written;
    }

    if (fflush(stdout))
        return 1;

    return 0;
}