[parisc-linux-cvs] linux-2.6 tausq

[Randolph Chung]

> 	.              : Makefile 
> 	arch/parisc/kernel: unaligned.c 
> 
> Log message:
> 2.6.0-test8-pa3: handle page faults during unaligned accesses

Patch posted previously on the list. Here's a test program.

#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <string.h>

int main(int argc, char **argv)
{
        void *addr;
        int ps;
        int *p, t;

        ps = getpagesize() * 8;

        addr = mmap(NULL, ps*2, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
        if (addr == NULL)
        {
                fprintf(stderr, "mmap() failed\n");
                return 0;
        }

        memset(addr, 0, ps*2);

        if (munmap(addr+ps, ps) < 0)
        {
                perror("munmap");
                return 0;
        }

        printf("1st load\n");
        p = (addr+ps-5);
        t = *p;

        printf("2nd load\n");
        p = (addr+ps-1);
        t = *p;

        printf("3rd load\n");
        p = (addr+ps+1);
        t = *p;

        printf("1st store\n");
        p = (addr+ps-5);
        *p = t;

        printf("2nd store\n");
        p = (addr+ps-1);
        *p = t;

        printf("3rd store\n");
        p = (addr+ps+1);
        *p = t;

        return 0;
}

-- 
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/