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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2018 Joyent, Inc.
*/
#include <sys/types.h>
#include <sys/sysi86.h>
#include <sys/segments.h>
#include <sys/segment.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <pthread.h>
#include <err.h>
char foo[4096];
static void *
donothing(void *nothing)
{
(void) sleep(5);
return (NULL);
}
int
main(void)
{
pthread_t tid;
/*
* This first is similar to what sbcl does in some variants. Note the
* SDT_MEMRW (not SDT_MEMRWA) so we check that the kernel is forcing the
* 'accessed' bit too.
*/
int sel = SEL_LDT(7);
struct ssd ssd = { sel, (unsigned long)&foo, 4096,
SDT_MEMRW | (SEL_UPL << 5) | (1 << 7), 0x4 };
if (sysi86(SI86DSCR, &ssd) < 0)
err(-1, "failed to setup segment");
__asm__ __volatile__("mov %0, %%fs" : : "r" (sel));
ssd.acc1 = 0;
if (sysi86(SI86DSCR, &ssd) == 0)
errx(-1, "removed in-use segment?");
__asm__ __volatile__("mov %0, %%fs" : : "r" (0));
if (sysi86(SI86DSCR, &ssd) < 0)
err(-1, "failed to remove segment");
for (int i = 0; i < MAXNLDT; i++) {
ssd.sel = SEL_LDT(i);
(void) sysi86(SI86DSCR, &ssd);
}
for (int i = 0; i < 10; i++)
(void) pthread_create(&tid, NULL, donothing, NULL);
if (forkall() == 0) {
(void) sleep(2);
_exit(0);
}
(void) sleep(6);
return (0);
}
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