cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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check_mmap3.c (675B)

      1/*
      2#notarget: cris*-*-elf
      3*/
      4
      5#define _GNU_SOURCE
      6#include <string.h>
      7#include <stdlib.h>
      8#include <stdio.h>
      9#include <sys/types.h>
     10#include <sys/stat.h>
     11#include <unistd.h>
     12#include <sys/mman.h>
     13
     14int main (int argc, char *argv[])
     15{
     16  volatile unsigned char *a;
     17
     18  /* Check that we can map a non-multiple of a page and still get a full page.  */
     19  a = mmap (NULL, 0x4c, PROT_READ | PROT_WRITE | PROT_EXEC,
     20            MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
     21  if (a == NULL || a == (unsigned char *) -1)
     22    abort ();
     23
     24  a[0] = 0xbe;
     25  a[8191] = 0xef;
     26  memset ((char *) a + 1, 0, 8190);
     27
     28  if (a[0] != 0xbe || a[8191] != 0xef)
     29    abort ();
     30
     31  printf ("pass\n");
     32  exit (0);
     33}