Archipelago » qemu

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include <unistd.h>

#include <sys/syscall.h>

#ifndef SYS_set_thread_area

#define SYS_set_thread_area 243

#endif

int main (void)

{

    unsigned long tp, old_tp;

    int ret;

    asm volatile ("move $pid,%0" : "=r" (old_tp));

    old_tp &= ~0xff;

    ret = syscall (SYS_set_thread_area, 0xf0);

    if (ret != -1 || errno != EINVAL) {

        syscall (SYS_set_thread_area, old_tp);

        perror ("Invalid thread area accepted:");

        abort();

    }

    ret = syscall (SYS_set_thread_area, 0xeddeed00);

    if (ret != 0) {

        perror ("Valid thread area not accepted: ");

        abort ();

    }

    asm volatile ("move $pid,%0" : "=r" (tp));

    tp &= ~0xff;

    syscall (SYS_set_thread_area, old_tp);

    if (tp != 0xeddeed00) {

        * (volatile int *) 0 = 0;

        perror ("tls2");

        abort ();

    }

    printf ("pass\n");

    return EXIT_SUCCESS;

}