qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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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 
     14 int 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 }