xref: /illumos-gate/usr/src/uts/common/sys/systm.h (revision 954fa1e9)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23 /*	  All Rights Reserved	*/
24 
25 /*
26  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
27  * Use is subject to license terms.
28  * Copyright 2016 Nexenta Systems, Inc.
29  */
30 
31 #ifndef _SYS_SYSTM_H
32 #define	_SYS_SYSTM_H
33 
34 #if defined(_STANDALONE)
35 #include <sys/cdefs.h>
36 #include <string.h>
37 #else
38 #include <sys/types.h>
39 #include <sys/t_lock.h>
40 #include <sys/proc.h>
41 #include <sys/dditypes.h>
42 #endif
43 
44 #ifdef	__cplusplus
45 extern "C" {
46 #endif
47 
48 #if !defined(_STANDALONE)
49 /*
50  * The pc_t is the type of the kernel's program counter.  In general, a
51  * pc_t is a uintptr_t -- except for a sparcv9 kernel, in which case all
52  * instruction text is below 4G, and a pc_t is thus a uint32_t.
53  */
54 #ifdef __sparcv9
55 typedef uint32_t pc_t;
56 #else
57 typedef uintptr_t pc_t;
58 #endif
59 
60 /*
61  * Random set of variables used by more than one routine.
62  */
63 
64 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
65 #include <sys/types32.h>
66 #include <sys/varargs.h>
67 #include <sys/uadmin.h>
68 
69 extern int hz;			/* system clock rate */
70 extern struct vnode *rootdir;	/* pointer to vnode of root directory */
71 extern struct vnode *devicesdir;	/* pointer to /devices vnode */
72 extern int interrupts_unleashed;	/* set after the spl0() in main() */
73 
74 extern char runin;		/* scheduling flag */
75 extern char runout;		/* scheduling flag */
76 extern char wake_sched;		/* causes clock to wake swapper on next tick */
77 extern char wake_sched_sec;	/* causes clock to wake swapper after a sec */
78 
79 extern pgcnt_t	maxmem;		/* max available memory (pages) */
80 extern pgcnt_t	physmem;	/* physical memory (pages) on this CPU */
81 extern pfn_t	physmax;	/* highest numbered physical page present */
82 extern pgcnt_t	physinstalled;	/* physical pages including PROM/boot use */
83 
84 extern caddr_t	s_text;		/* start of kernel text segment */
85 extern caddr_t	e_text;		/* end of kernel text segment */
86 extern caddr_t	s_data;		/* start of kernel text segment */
87 extern caddr_t	e_data;		/* end of kernel text segment */
88 
89 extern pgcnt_t	availrmem;	/* Available resident (not swapable)	*/
90 				/* memory in pages.			*/
91 extern pgcnt_t	availrmem_initial;	/* initial value of availrmem	*/
92 extern pgcnt_t	segspt_minfree;	/* low water mark for availrmem in seg_spt */
93 extern pgcnt_t	freemem;	/* Current free memory.			*/
94 
95 extern dev_t	rootdev;	/* device of the root */
96 extern struct vnode *rootvp;	/* vnode of root device */
97 extern boolean_t root_is_ramdisk;	/* root is boot_archive ramdisk */
98 extern uint32_t  ramdisk_size;		/* (KB) set only for sparc netboots */
99 extern char *volatile panicstr;	/* panic string pointer */
100 extern va_list  panicargs;	/* panic arguments */
101 extern volatile int quiesce_active;	/* quiesce(9E) is in progress */
102 
103 extern int	rstchown;	/* 1 ==> restrictive chown(2) semantics */
104 extern int	klustsize;
105 
106 extern int	abort_enable;	/* Platform input-device abort policy */
107 
108 extern int	audit_active;	/* Solaris Auditing module state */
109 
110 extern int	avenrun[];	/* array of load averages */
111 
112 extern char *isa_list;		/* For sysinfo's isalist option */
113 
114 extern int noexec_user_stack;		/* patchable via /etc/system */
115 extern int noexec_user_stack_log;	/* patchable via /etc/system */
116 
117 /*
118  * Use NFS client operations in the global zone only.  Under contract with
119  * admin/install; do not change without coordinating with that consolidation.
120  */
121 extern int nfs_global_client_only;
122 
123 extern void report_stack_exec(proc_t *, caddr_t);
124 
125 extern void startup(void);
126 extern void clkstart(void);
127 extern void post_startup(void);
128 extern void kern_setup1(void);
129 extern void ka_init(void);
130 extern void nodename_set(void);
131 
132 /*
133  * for tod fault detection
134  */
135 enum tod_fault_type {
136 	TOD_REVERSED = 0,
137 	TOD_STALLED,
138 	TOD_JUMPED,
139 	TOD_RATECHANGED,
140 	TOD_RDONLY,
141 	TOD_NOFAULT
142 };
143 
144 #define	TOD_GET_FAILED		0x1	/* TOD could not be read */
145 #define	TOD_SET_DONE		0x2	/* TOD has been modified */
146 #define	TOD_CPR_RESUME_DONE	0x4	/* CPR resume has occurred */
147 #define	TOD_DR_RESUME_DONE	0x8	/* DR resume has occurred */
148 
149 extern time_t tod_validate(time_t);
150 extern void tod_status_set(int);
151 extern void tod_status_clear(int);
152 extern void plat_tod_fault(enum tod_fault_type);
153 
154 #ifndef _LP64
155 #ifndef min
156 int min(int, int);
157 #endif
158 
159 #ifndef max
160 int max(int, int);
161 #endif
162 
163 uint_t umin(uint_t, uint_t);
164 uint_t umax(uint_t, uint_t);
165 #endif /* !_LP64 */
166 int grow(caddr_t);
167 int grow_internal(caddr_t, uint_t);
168 int brk_internal(caddr_t, uint_t);
169 typedef uint64_t callout_id_t;
170 timeout_id_t timeout(void (*)(void *), void *, clock_t);
171 timeout_id_t realtime_timeout(void (*)(void *), void *, clock_t);
172 clock_t untimeout(timeout_id_t);
173 /*
174  * The last argument to timeout_generic() is flags. See callo.h for the
175  * flags definitions.
176  */
177 callout_id_t timeout_generic(int, void (*)(void *), void *, hrtime_t, hrtime_t,
178     int);
179 callout_id_t timeout_default(void (*)(void *), void *, clock_t);
180 callout_id_t realtime_timeout_default(void (*)(void *), void *, clock_t);
181 /*
182  * The last argument to untimeout_generic() is flags. See callout.c for the
183  * use.
184  */
185 hrtime_t untimeout_generic(callout_id_t, int);
186 clock_t untimeout_default(callout_id_t, int);
187 void delay(clock_t);
188 int delay_sig(clock_t);
189 void delay_random(clock_t);
190 int nodev();
191 int nulldev();
192 major_t getudev(void);
193 int cmpldev(dev32_t *, dev_t);
194 dev_t expldev(dev32_t);
195 int bcmp(const void *, const void *, size_t) __PURE;
196 int stoi(char **);
197 void numtos(ulong_t, char *);
198 char *kmem_asprintf(const char *fmt, ...);
199 int strident_valid(const char *);
200 void strident_canon(char *, size_t);
201 int getsubopt(char **optionsp, char * const *tokens, char **valuep);
202 char *append_subopt(const char *, size_t, char *, const char *);
203 #ifndef	_FAKE_KERNEL
204 /* conflicts with libc definition */
205 int ffs(uintmax_t);
206 #endif
207 int copyin(const void *, void *, size_t);
208 void copyin_noerr(const void *, void *, size_t);
209 int xcopyin(const void *, void *, size_t);
210 int xcopyin_nta(const void *, void *, size_t, int);
211 int copyout(const void *, void *, size_t);
212 void copyout_noerr(const void *, void *, size_t);
213 int xcopyout(const void *, void *, size_t);
214 int xcopyout_nta(const void *, void *, size_t, int);
215 int copyinstr(const char *, char *, size_t, size_t *);
216 int copyinstr_noerr(const char *, char *, size_t, size_t *);
217 int copyoutstr(const char *, char *, size_t, size_t *);
218 int copyoutstr_noerr(const char *, char *, size_t, size_t *);
219 int copystr(const char *, char *, size_t, size_t *);
220 void ucopy(const void *, void *, size_t);
221 void ucopystr(const char *, char *, size_t, size_t *);
222 void pgcopy(const void *, void *, size_t);
223 void ovbcopy(const void *, void *, size_t);
224 void uzero(void *, size_t);
225 int kcopy(const void *, void *, size_t);
226 int kcopy_nta(const void *, void *, size_t, int);
227 int kzero(void *, size_t);
228 
229 int fuword8(const void *, uint8_t *);
230 int fuword16(const void *, uint16_t *);
231 int fuword32(const void *, uint32_t *);
232 int fulword(const void *, ulong_t *);
233 void fuword8_noerr(const void *, uint8_t *);
234 void fuword16_noerr(const void *, uint16_t *);
235 void fuword32_noerr(const void *, uint32_t *);
236 void fulword_noerr(const void *, ulong_t *);
237 
238 #ifdef _LP64
239 int fuword64(const void *, uint64_t *);
240 void fuword64_noerr(const void *, uint64_t *);
241 #endif
242 
243 int subyte(void *, uint8_t);
244 int suword8(void *, uint8_t);
245 int suword16(void *, uint16_t);
246 int suword32(void *, uint32_t);
247 int sulword(void *, ulong_t);
248 void subyte_noerr(void *, uint8_t);
249 void suword8_noerr(void *, uint8_t);
250 void suword16_noerr(void *, uint16_t);
251 void suword32_noerr(void *, uint32_t);
252 void sulword_noerr(void *, ulong_t);
253 
254 #ifdef _LP64
255 int suword64(void *, uint64_t);
256 void suword64_noerr(void *, uint64_t);
257 #endif
258 
259 #if !defined(_BOOT) && !defined(_FAKE_KERNEL)
260 /* conflicts with libc definition */
261 int setjmp(label_t *) __RETURNS_TWICE;
262 extern void longjmp(label_t *)
263 	__NORETURN;
264 #pragma unknown_control_flow(setjmp)
265 #endif
266 
267 void prefetch_read_once(void *);
268 void prefetch_write_once(void *);
269 void prefetch_read_many(void *);
270 void prefetch_write_many(void *);
271 caddr_t caller(void);
272 caddr_t callee(void);
273 int getpcstack(pc_t *, int);
274 int on_fault(label_t *) __RETURNS_TWICE;
275 void no_fault(void);
276 void halt(char *);
277 int scanc(size_t, uchar_t *, uchar_t *, uchar_t);
278 int movtuc(size_t, uchar_t *, uchar_t *, uchar_t *);
279 int splr(int);
280 int splhigh(void);
281 int splhi(void);
282 int splzs(void);
283 int spl0(void);
284 int spl6(void);
285 int spl7(void);
286 int spl8(void);
287 void splx(int);
288 void set_base_spl(void);
289 int __ipltospl(int);
290 int spl_xcall(void);
291 
292 void softcall_init(void);
293 void softcall(void (*)(void *), void *);
294 void softint(void);
295 
296 extern void sync_icache(caddr_t, uint_t);
297 extern void sync_data_memory(caddr_t, size_t);
298 extern void hot_patch_kernel_text(caddr_t, uint32_t, uint_t);
299 
300 void _insque(caddr_t, caddr_t);
301 void _remque(caddr_t);
302 
303 /* casts to keep lint happy */
304 #define	insque(q, p)	_insque((caddr_t)q, (caddr_t)p)
305 #define	remque(q)	_remque((caddr_t)q)
306 
307 #pragma unknown_control_flow(on_fault)
308 
309 struct timeval;
310 extern void	uniqtime(struct timeval *);
311 struct timeval32;
312 extern void	uniqtime32(struct timeval32 *);
313 
314 uint_t page_num_pagesizes(void);
315 size_t page_get_pagesize(uint_t n);
316 
317 extern int maxusers;
318 extern int pidmax;
319 
320 extern void param_preset(void);
321 extern void param_calc(int);
322 extern void param_init(void);
323 extern void param_check(void);
324 
325 #endif /* _KERNEL */
326 
327 /*
328  * Structure of the system-entry table.
329  *
330  *	Changes to struct sysent should maintain binary compatibility with
331  *	loadable system calls, although the interface is currently private.
332  *
333  *	This means it should only be expanded on the end, and flag values
334  *	should not be reused.
335  *
336  *	It is desirable to keep the size of this struct a power of 2 for quick
337  *	indexing.
338  */
339 struct sysent {
340 	char		sy_narg;	/* total number of arguments */
341 #ifdef _LP64
342 	unsigned short	sy_flags;	/* various flags as defined below */
343 #else
344 	unsigned char	sy_flags;	/* various flags as defined below */
345 #endif
346 	int		(*sy_call)();	/* argp, rvalp-style handler */
347 	krwlock_t	*sy_lock;	/* lock for loadable system calls */
348 	int64_t		(*sy_callc)();	/* C-style call hander or wrapper */
349 };
350 
351 extern struct sysent	sysent[];
352 #ifdef _SYSCALL32_IMPL
353 extern struct sysent	sysent32[];
354 #endif
355 
356 extern struct sysent	nosys_ent;	/* entry for invalid system call */
357 
358 #define	NSYSCALL	256		/* number of system calls */
359 
360 #define	LOADABLE_SYSCALL(s)	(s->sy_flags & SE_LOADABLE)
361 #define	LOADED_SYSCALL(s)	(s->sy_flags & SE_LOADED)
362 
363 /*
364  * sy_flags values
365  *	Values 1, 2, and 4 were used previously for SETJUMP, ASYNC, and IOSYS.
366  */
367 #define	SE_32RVAL1	0x0		/* handler returns int32_t in rval1 */
368 #define	SE_32RVAL2	0x1		/* handler returns int32_t in rval2 */
369 #define	SE_64RVAL	0x2		/* handler returns int64_t in rvals */
370 #define	SE_RVAL_MASK	0x3		/* mask of rval_t bits */
371 
372 #define	SE_LOADABLE	0x08		/* syscall is loadable */
373 #define	SE_LOADED	0x10		/* syscall is completely loaded */
374 #define	SE_NOUNLOAD	0x20		/* syscall never needs unload */
375 #define	SE_ARGC		0x40		/* syscall takes C-style args */
376 
377 /*
378  * Structure of the return-value parameter passed by reference to
379  * system entries.
380  */
381 union rval {
382 	struct	{
383 		int	r_v1;
384 		int	r_v2;
385 	} r_v;
386 	off_t	r_off;
387 	offset_t r_offset;
388 	time_t	r_time;
389 	int64_t	r_vals;
390 };
391 #define	r_val1	r_v.r_v1
392 #define	r_val2	r_v.r_v2
393 
394 typedef union rval rval_t;
395 
396 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
397 
398 extern void reset_syscall_args(void);
399 extern int save_syscall_args(void);
400 extern uint_t get_syscall_args(klwp_t *lwp, long *argp, int *nargsp);
401 #ifdef _SYSCALL32_IMPL
402 extern uint_t get_syscall32_args(klwp_t *lwp, int *argp, int *nargp);
403 #endif
404 
405 extern uint_t set_errno(uint_t error);
406 #pragma rarely_called(set_errno)
407 
408 extern int64_t syscall_ap(void);
409 extern int64_t loadable_syscall(long, long, long, long, long, long, long, long);
410 extern int64_t nosys(void);
411 extern int nosys32(void);
412 
413 extern void swtch(void);
414 
415 extern uint_t	kcpc_key;	/* TSD key for performance counter context */
416 
417 /*
418  * initname holds the path to init and is used as a point of rendezvous
419  * between krtld (which processes the boot arguments) and the kernel.
420  */
421 #define	INITNAME_SZ	32
422 extern char initname[INITNAME_SZ];
423 
424 /*
425  * initargs holds the arguments to init (such as -v, -s, -r, -m verbose) and
426  * is a point of rendezvous between krtld (which processes the boot arguments)
427  * and the kernel.
428  */
429 extern char initargs[BOOTARGS_MAX];
430 
431 extern int exec_init(const char *, const char *);
432 extern int start_init_common(void);
433 
434 #endif	/* _KERNEL */
435 
436 #if defined(_KERNEL) || defined(_FAKE_KERNEL) || defined(_BOOT)
437 
438 size_t strlcat(char *, const char *, size_t);
439 size_t strlen(const char *) __PURE;
440 char *strcat(char *, const char *);
441 char *strncat(char *, const char *, size_t);
442 char *strcpy(char *, const char *);
443 char *strncpy(char *, const char *, size_t);
444 
445 extern size_t strlcpy(char *, const char *, size_t);
446 extern size_t strspn(const char *, const char *);
447 extern size_t strcspn(const char *, const char *);
448 extern char *strdup(const char *);
449 extern void strfree(char *);
450 
451 /* Need to be consistent with <string.h> C++ definitions */
452 #if __cplusplus >= 199711L
453 extern const char *strchr(const char *, int);
454 #ifndef _STRCHR_INLINE
455 #define	_STRCHR_INLINE
456 extern "C++" {
strchr(char * __s,int __c)457 	inline char *strchr(char *__s, int __c) {
458 		return (char *)strchr((const char *)__s, __c);
459 	}
460 }
461 #endif /* _STRCHR_INLINE */
462 extern const char *strrchr(const char *, int);
463 #ifndef	_STRRCHR_INLINE
464 #define	_STRRCHR_INLINE
465 extern "C++" {
strrchr(char * __s,int __c)466 	inline char *strrchr(char *__s, int __c) {
467 		return (char *)strrchr((const char *)__s, __c);
468 	}
469 }
470 #endif	/* _STRRCHR_INLINE */
471 extern const char *strstr(const char *, const char *);
472 #ifndef	_STRSTR_INLINE
473 #define	_STRSTR_INLINE
474 extern "C++" {
strstr(char * __s1,const char * __s2)475 	inline char *strstr(char *__s1, const char *__s2) {
476 		return (char *)strstr((const char *)__s1, __s2);
477 	}
478 }
479 #endif  /* _STRSTR_INLINE */
480 #else	/* __cplusplus >= 199711L */
481 char *strchr(const char *, int);
482 char *strrchr(const char *, int);
483 char *strstr(const char *, const char *);
484 #endif	/* __cplusplus >= 199711L */
485 char *strnrchr(const char *, int, size_t);
486 int strcmp(const char *, const char *) __PURE;
487 int strncmp(const char *, const char *, size_t) __PURE;
488 int strcasecmp(const char *, const char *) __PURE;
489 int strncasecmp(const char *, const char *, size_t) __PURE;
490 /* Need to be consistent with <string.h> C++ definitions */
491 #if __cplusplus >= 199711L
492 extern const char *strpbrk(const char *, const char *);
493 #ifndef _STRPBRK_INLINE
494 #define	_STRPBRK_INLINE
495 extern "C++" {
strpbrk(char * __s1,const char * __s2)496 	inline char *strpbrk(char *__s1, const char *__s2) {
497 		return (char *)strpbrk((const char *)__s1, __s2);
498 	}
499 }
500 #endif /* _STRPBRK_INLINE */
501 #else /* __cplusplus >= 199711L */
502 char *strpbrk(const char *, const char *);
503 #endif /* __cplusplus >= 199711L */
504 void bcopy(const void *, void *, size_t);
505 void bzero(void *, size_t);
506 
507 extern void *memset(void *, int, size_t);
508 extern void *memcpy(void *, const void *, size_t);
509 extern void *memmove(void *, const void *, size_t);
510 extern int memcmp(const void *, const void *, size_t);
511 
512 #ifdef __lint
513 extern	int	__lintzero;	/* for spoofing lint */
514 #else	/* __lint */
515 #define	__lintzero 0
516 #endif	/* __lint */
517 #endif /* _KERNEL || _BOOT */
518 #endif /* !_STANDALONE */
519 
520 #ifdef	__cplusplus
521 }
522 #endif
523 
524 #endif	/* _SYS_SYSTM_H */
525