kern/45249: compat_netbsd32 doesn't support aio(3)

[jmcneill%invisible.ca@localhost]

>Number:         45249
>Category:       kern
>Synopsis:       compat_netbsd32 doesn't support aio(3)
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Aug 13 20:45:01 +0000 2011
>Originator:     Jared McNeill
>Release:        5.99.55
>Organization:
>Environment:
>Description:
Running 32-bit binaries on amd64 that use aio(3) fail because compat_netbsd32 
doesn't implement these functions.
>How-To-Repeat:
/* compile with cc -m32 */
#include <aio.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int
main(void)
{
        struct aiocb aiocb;
        struct aiocb *list[1] = { &aiocb };
        uint8_t buf[100];
        int fd, error;

        fd = open("/dev/zero", O_RDONLY, 0);
        if (fd == -1)
                errx(1, "open /dev/zero");

        memset(&aiocb, 0, sizeof(aiocb));
        aiocb.aio_fildes = fd;
        aiocb.aio_buf = buf;
        aiocb.aio_nbytes = sizeof(buf);
        aiocb.aio_offset = 0;
        error = aio_read(&aiocb);
        if (error == -1)
                errx(1, "aio_read");

        error = aio_suspend((const struct aiocb * const *)list, 1, NULL);
        if (error == -1)
                errx(1, "aio_suspend");

        close(fd);

        printf("ok!\n");

        return 0;
}

>Fix: