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emul.c revision 1.155 
      1 /*	$NetBSD: emul.c,v 1.155 2013/03/18 13:36:23 para Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007-2011 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: emul.c,v 1.155 2013/03/18 13:36:23 para Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/null.h>
     33 #include <sys/vnode.h>
     34 #include <sys/stat.h>
     35 #include <sys/select.h>
     36 #include <sys/syslog.h>
     37 #include <sys/namei.h>
     38 #include <sys/kauth.h>
     39 #include <sys/conf.h>
     40 #include <sys/device.h>
     41 #include <sys/queue.h>
     42 #include <sys/file.h>
     43 #include <sys/cpu.h>
     44 #include <sys/kmem.h>
     45 #include <sys/poll.h>
     46 #include <sys/timetc.h>
     47 #include <sys/tprintf.h>
     48 #include <sys/module.h>
     49 #include <sys/tty.h>
     50 #include <sys/reboot.h>
     51 #include <sys/syscall.h>
     52 #include <sys/syscallvar.h>
     53 #include <sys/xcall.h>
     54 #include <sys/sleepq.h>
     55 
     56 #include <dev/cons.h>
     57 
     58 #include <rump/rumpuser.h>
     59 
     60 #include <uvm/uvm_map.h>
     61 
     62 #include "rump_private.h"
     63 
     64 /*
     65  * physmem is largely unused (except for nmbcluster calculations),
     66  * so pick a default value which suits ZFS.  if an application wants
     67  * a very small memory footprint, it can still adjust this before
     68  * calling rump_init()
     69  */
     70 #define PHYSMEM 512*256
     71 int physmem = PHYSMEM;
     72 int nkmempages = PHYSMEM/2; /* from le chapeau */
     73 #undef PHYSMEM
     74 
     75 struct lwp lwp0;
     76 struct vnode *rootvp;
     77 dev_t rootdev = NODEV;
     78 
     79 const int schedppq = 1;
     80 int hardclock_ticks;
     81 bool mp_online = false;
     82 struct timeval boottime;
     83 int cold = 1;
     84 int boothowto = AB_SILENT;
     85 struct tty *constty;
     86 
     87 const struct bdevsw *bdevsw0[255];
     88 const struct bdevsw **bdevsw = bdevsw0;
     89 const int sys_cdevsws = 255;
     90 int max_cdevsws = 255;
     91 
     92 const struct cdevsw *cdevsw0[255];
     93 const struct cdevsw **cdevsw = cdevsw0;
     94 const int sys_bdevsws = 255;
     95 int max_bdevsws = 255;
     96 
     97 int mem_no = 2;
     98 
     99 device_t booted_device;
    100 device_t booted_wedge;
    101 int booted_partition;
    102 
    103 /* XXX: unused */
    104 kmutex_t tty_lock;
    105 krwlock_t exec_lock;
    106 
    107 struct lwplist alllwp = LIST_HEAD_INITIALIZER(alllwp);
    108 
    109 /* sparc doesn't sport constant page size, pretend we have 4k pages */
    110 #ifdef __sparc__
    111 int nbpg = 4096;
    112 int pgofset = 4096-1;
    113 int pgshift = 12;
    114 #endif
    115 
    116 /* on sun3 VM_MAX_ADDRESS is a const variable */
    117 /* XXX: should be moved into rump.c and initialize for sun3 and sun3x? */
    118 #ifdef sun3
    119 const vaddr_t kernbase = KERNBASE3;
    120 #endif
    121 
    122 struct loadavg averunnable = {
    123 	{ 0 * FSCALE,
    124 	  1 * FSCALE,
    125 	  11 * FSCALE, },
    126 	FSCALE,
    127 };
    128 
    129 struct emul emul_netbsd = {
    130 	.e_name = "netbsd-rump",
    131 	.e_sysent = rump_sysent,
    132 #ifndef __HAVE_MINIMAL_EMUL
    133 	.e_nsysent = SYS_NSYSENT,
    134 #endif
    135 	.e_vm_default_addr = uvm_default_mapaddr,
    136 #ifdef __HAVE_SYSCALL_INTERN
    137 	.e_syscall_intern = syscall_intern,
    138 #endif
    139 };
    140 
    141 u_int nprocs = 1;
    142 
    143 int
    144 kpause(const char *wmesg, bool intr, int timeo, kmutex_t *mtx)
    145 {
    146 	extern int hz;
    147 	int rv, error;
    148 	uint64_t sec, nsec;
    149 
    150 	if (mtx)
    151 		mutex_exit(mtx);
    152 
    153 	sec = timeo / hz;
    154 	nsec = (timeo % hz) * (1000000000 / hz);
    155 	rv = rumpuser_nanosleep(&sec, &nsec, &error);
    156 
    157 	if (mtx)
    158 		mutex_enter(mtx);
    159 
    160 	if (rv)
    161 		return error;
    162 
    163 	return 0;
    164 }
    165 
    166 void
    167 lwp_unsleep(lwp_t *l, bool cleanup)
    168 {
    169 
    170 	KASSERT(mutex_owned(l->l_mutex));
    171 
    172 	(*l->l_syncobj->sobj_unsleep)(l, cleanup);
    173 }
    174 
    175 void
    176 lwp_update_creds(struct lwp *l)
    177 {
    178 	struct proc *p;
    179 	kauth_cred_t oldcred;
    180 
    181 	p = l->l_proc;
    182 	oldcred = l->l_cred;
    183 	l->l_prflag &= ~LPR_CRMOD;
    184 
    185 	mutex_enter(p->p_lock);
    186 	kauth_cred_hold(p->p_cred);
    187 	l->l_cred = p->p_cred;
    188 	mutex_exit(p->p_lock);
    189 
    190 	if (oldcred != NULL)
    191 		kauth_cred_free(oldcred);
    192 }
    193 
    194 vaddr_t
    195 calc_cache_size(vsize_t vasz, int pct, int va_pct)
    196 {
    197 	paddr_t t;
    198 
    199 	t = (paddr_t)physmem * pct / 100 * PAGE_SIZE;
    200 	if ((vaddr_t)t != t) {
    201 		panic("%s: needs tweak", __func__);
    202 	}
    203 	return t;
    204 }
    205 
    206 void
    207 assert_sleepable(void)
    208 {
    209 
    210 	/* always sleepable, although we should improve this */
    211 }
    212 
    213 void
    214 module_init_md(void)
    215 {
    216 
    217 	/*
    218 	 * Nothing for now.  However, we should load the librump
    219 	 * symbol table.
    220 	 */
    221 }
    222 
    223 /* us and them, after all we're only ordinary seconds */
    224 static void
    225 rump_delay(unsigned int us)
    226 {
    227 	uint64_t sec, nsec;
    228 	int error;
    229 
    230 	sec = us / 1000000;
    231 	nsec = (us % 1000000) * 1000;
    232 
    233 	if (__predict_false(sec != 0))
    234 		printf("WARNING: over 1s delay\n");
    235 
    236 	rumpuser_nanosleep(&sec, &nsec, &error);
    237 }
    238 void (*delay_func)(unsigned int) = rump_delay;
    239 
    240 /*
    241  * Provide weak aliases for tty routines used by printf.
    242  * They will be used unless the rumpkern_tty component is present.
    243  */
    244 
    245 int rump_ttycheckoutq(struct tty *, int);
    246 int
    247 rump_ttycheckoutq(struct tty *tp, int wait)
    248 {
    249 
    250 	return 1;
    251 }
    252 __weak_alias(ttycheckoutq,rump_ttycheckoutq);
    253 
    254 int rump_tputchar(int, int, struct tty *);
    255 int
    256 rump_tputchar(int c, int flags, struct tty *tp)
    257 {
    258 
    259 	cnputc(c);
    260 	return 0;
    261 }
    262 __weak_alias(tputchar,rump_tputchar);
    263 
    264 void
    265 cnputc(int c)
    266 {
    267 	int error;
    268 
    269 	rumpuser_putchar(c, &error);
    270 }
    271 
    272 void
    273 cnflush(void)
    274 {
    275 
    276 	/* done */
    277 }
    278 
    279 #ifdef __HAVE_SYSCALL_INTERN
    280 void
    281 syscall_intern(struct proc *p)
    282 {
    283 
    284 	/* no you don't */
    285 }
    286 #endif
    287 
    288 int
    289 trace_enter(register_t code, const register_t *args, int narg)
    290 {
    291 
    292 	return 0;
    293 }
    294 
    295 void
    296 trace_exit(register_t code, register_t rval[], int error)
    297 {
    298 
    299 	/* nada */
    300 }
    301 
    302 #ifdef LOCKDEBUG
    303 void
    304 turnstile_print(volatile void *obj, void (*pr)(const char *, ...))
    305 {
    306 
    307 	/* nada */
    308 }
    309 #endif
    310