devmnt.ed

在x86平台上运行不可信任代码的sandbox。

,s!Lock;!Lock lk;!
,s!lock(c)!lock(\&c->ref.lk)!g
,s!lock(\&mntalloc)!lock(\&mntalloc.lk)!g
,s!lock(m)!lock(\&m->lk)!g
,s!ref(m->c)!ref(\&m->c->ref)!g
,s!ref(c->mchan)!ref(\&c->mchan->ref)!g
/c = bogus.chan/a

	{ // Plan 9 VX addition
		extern Dev mntloopdevtab;
		Chan *mc;
		if(devtab[c->type] == &mntloopdevtab){
			if(bogus.authchan || (bogus.spec && bogus.spec[0]))
				error(Ebadarg);
			mc = c->aux;
			incref(&mc->ref);
			return mc;
		}
	}

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