FreeBSD/Linux Kernel Cross Reference
sys/i386/linux/linux.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1994-1996 Søren Schmidt
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 * $FreeBSD: releng/12.0/sys/i386/linux/linux.h 335201 2018-06-15 14:41:51Z emaste $
28 */
29
30 #ifndef _I386_LINUX_H_
31 #define _I386_LINUX_H_
32
33 #include <sys/signal.h> /* for sigval union */
34
35 #include <compat/linux/linux.h>
36 #include <i386/linux/linux_syscall.h>
37
38 #define LINUX_LEGACY_SYSCALLS
39
40 /*
41 * debugging support
42 */
43 extern u_char linux_debug_map[];
44 #define ldebug(name) isclr(linux_debug_map, LINUX_SYS_linux_ ## name)
45 #define ARGS(nm, fmt) "linux(%ld/%ld): "#nm"("fmt")\n", \
46 (long)td->td_proc->p_pid, (long)td->td_tid
47 #define LMSG(fmt) "linux(%ld/%ld): "fmt"\n", \
48 (long)td->td_proc->p_pid, (long)td->td_tid
49 #define LINUX_DTRACE linuxulator
50
51 #define LINUX_SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
52 #define LINUX_USRSTACK LINUX_SHAREDPAGE
53
54 #define PTRIN(v) (void *)(v)
55 #define PTROUT(v) (l_uintptr_t)(v)
56
57 #define CP(src,dst,fld) do { (dst).fld = (src).fld; } while (0)
58 #define CP2(src,dst,sfld,dfld) do { (dst).dfld = (src).sfld; } while (0)
59 #define PTRIN_CP(src,dst,fld) \
60 do { (dst).fld = PTRIN((src).fld); } while (0)
61
62 /*
63 * Provide a separate set of types for the Linux types.
64 */
65 typedef int l_int;
66 typedef int32_t l_long;
67 typedef int64_t l_longlong;
68 typedef short l_short;
69 typedef unsigned int l_uint;
70 typedef uint32_t l_ulong;
71 typedef uint64_t l_ulonglong;
72 typedef unsigned short l_ushort;
73
74 typedef char *l_caddr_t;
75 typedef l_ulong l_uintptr_t;
76 typedef l_long l_clock_t;
77 typedef l_int l_daddr_t;
78 typedef l_ushort l_dev_t;
79 typedef l_uint l_gid_t;
80 typedef l_ushort l_gid16_t;
81 typedef l_ulong l_ino_t;
82 typedef l_int l_key_t;
83 typedef l_longlong l_loff_t;
84 typedef l_ushort l_mode_t;
85 typedef l_long l_off_t;
86 typedef l_int l_pid_t;
87 typedef l_uint l_size_t;
88 typedef l_long l_suseconds_t;
89 typedef l_long l_time_t;
90 typedef l_uint l_uid_t;
91 typedef l_ushort l_uid16_t;
92 typedef l_int l_timer_t;
93 typedef l_int l_mqd_t;
94 typedef l_ulong l_fd_mask;
95
96 typedef struct {
97 l_int val[2];
98 } l_fsid_t;
99
100 typedef struct {
101 l_time_t tv_sec;
102 l_suseconds_t tv_usec;
103 } l_timeval;
104
105 #define l_fd_set fd_set
106
107 /*
108 * Miscellaneous
109 */
110 #define LINUX_AT_COUNT 20 /* Count of used aux entry types.
111 * Keep this synchronized with
112 * linux_fixup_elf() code.
113 */
114 struct l___sysctl_args
115 {
116 l_int *name;
117 l_int nlen;
118 void *oldval;
119 l_size_t *oldlenp;
120 void *newval;
121 l_size_t newlen;
122 l_ulong __spare[4];
123 };
124
125 /* Resource limits */
126 #define LINUX_RLIMIT_CPU 0
127 #define LINUX_RLIMIT_FSIZE 1
128 #define LINUX_RLIMIT_DATA 2
129 #define LINUX_RLIMIT_STACK 3
130 #define LINUX_RLIMIT_CORE 4
131 #define LINUX_RLIMIT_RSS 5
132 #define LINUX_RLIMIT_NPROC 6
133 #define LINUX_RLIMIT_NOFILE 7
134 #define LINUX_RLIMIT_MEMLOCK 8
135 #define LINUX_RLIMIT_AS 9 /* Address space limit */
136
137 #define LINUX_RLIM_NLIMITS 10
138
139 struct l_rlimit {
140 l_ulong rlim_cur;
141 l_ulong rlim_max;
142 };
143
144 struct l_mmap_argv {
145 l_uintptr_t addr;
146 l_size_t len;
147 l_int prot;
148 l_int flags;
149 l_int fd;
150 l_off_t pgoff;
151 } __packed;
152
153 /*
154 * stat family of syscalls
155 */
156 struct l_timespec {
157 l_time_t tv_sec;
158 l_long tv_nsec;
159 };
160
161 struct l_newstat {
162 l_ushort st_dev;
163 l_ushort __pad1;
164 l_ulong st_ino;
165 l_ushort st_mode;
166 l_ushort st_nlink;
167 l_ushort st_uid;
168 l_ushort st_gid;
169 l_ushort st_rdev;
170 l_ushort __pad2;
171 l_ulong st_size;
172 l_ulong st_blksize;
173 l_ulong st_blocks;
174 struct l_timespec st_atim;
175 struct l_timespec st_mtim;
176 struct l_timespec st_ctim;
177 l_ulong __unused4;
178 l_ulong __unused5;
179 };
180
181 struct l_stat {
182 l_ushort st_dev;
183 l_ulong st_ino;
184 l_ushort st_mode;
185 l_ushort st_nlink;
186 l_ushort st_uid;
187 l_ushort st_gid;
188 l_ushort st_rdev;
189 l_long st_size;
190 struct l_timespec st_atim;
191 struct l_timespec st_mtim;
192 struct l_timespec st_ctim;
193 l_long st_blksize;
194 l_long st_blocks;
195 l_ulong st_flags;
196 l_ulong st_gen;
197 };
198
199 struct l_stat64 {
200 l_ushort st_dev;
201 u_char __pad0[10];
202 l_ulong __st_ino;
203 l_uint st_mode;
204 l_uint st_nlink;
205 l_ulong st_uid;
206 l_ulong st_gid;
207 l_ushort st_rdev;
208 u_char __pad3[10];
209 l_longlong st_size;
210 l_ulong st_blksize;
211 l_ulong st_blocks;
212 l_ulong __pad4;
213 struct l_timespec st_atim;
214 struct l_timespec st_mtim;
215 struct l_timespec st_ctim;
216 l_ulonglong st_ino;
217 };
218
219 struct l_statfs64 {
220 l_int f_type;
221 l_int f_bsize;
222 uint64_t f_blocks;
223 uint64_t f_bfree;
224 uint64_t f_bavail;
225 uint64_t f_files;
226 uint64_t f_ffree;
227 l_fsid_t f_fsid;
228 l_int f_namelen;
229 l_int f_frsize;
230 l_int f_flags;
231 l_int f_spare[4];
232 };
233
234 #define LINUX_NSIG_WORDS 2
235
236 /* sigaction flags */
237 #define LINUX_SA_NOCLDSTOP 0x00000001
238 #define LINUX_SA_NOCLDWAIT 0x00000002
239 #define LINUX_SA_SIGINFO 0x00000004
240 #define LINUX_SA_RESTORER 0x04000000
241 #define LINUX_SA_ONSTACK 0x08000000
242 #define LINUX_SA_RESTART 0x10000000
243 #define LINUX_SA_INTERRUPT 0x20000000
244 #define LINUX_SA_NOMASK 0x40000000
245 #define LINUX_SA_ONESHOT 0x80000000
246
247 /* sigprocmask actions */
248 #define LINUX_SIG_BLOCK 0
249 #define LINUX_SIG_UNBLOCK 1
250 #define LINUX_SIG_SETMASK 2
251
252 /* sigaltstack */
253 #define LINUX_MINSIGSTKSZ 2048
254
255 typedef void (*l_handler_t)(l_int);
256 typedef l_ulong l_osigset_t;
257
258 typedef struct {
259 l_handler_t lsa_handler;
260 l_osigset_t lsa_mask;
261 l_ulong lsa_flags;
262 void (*lsa_restorer)(void);
263 } l_osigaction_t;
264
265 typedef struct {
266 l_handler_t lsa_handler;
267 l_ulong lsa_flags;
268 void (*lsa_restorer)(void);
269 l_sigset_t lsa_mask;
270 } l_sigaction_t;
271
272 typedef struct {
273 void *ss_sp;
274 l_int ss_flags;
275 l_size_t ss_size;
276 } l_stack_t;
277
278 /* The Linux sigcontext, pretty much a standard 386 trapframe. */
279 struct l_sigcontext {
280 l_int sc_gs;
281 l_int sc_fs;
282 l_int sc_es;
283 l_int sc_ds;
284 l_int sc_edi;
285 l_int sc_esi;
286 l_int sc_ebp;
287 l_int sc_esp;
288 l_int sc_ebx;
289 l_int sc_edx;
290 l_int sc_ecx;
291 l_int sc_eax;
292 l_int sc_trapno;
293 l_int sc_err;
294 l_int sc_eip;
295 l_int sc_cs;
296 l_int sc_eflags;
297 l_int sc_esp_at_signal;
298 l_int sc_ss;
299 l_int sc_387;
300 l_int sc_mask;
301 l_int sc_cr2;
302 };
303
304 struct l_ucontext {
305 l_ulong uc_flags;
306 void *uc_link;
307 l_stack_t uc_stack;
308 struct l_sigcontext uc_mcontext;
309 l_sigset_t uc_sigmask;
310 };
311
312 #define LINUX_SI_MAX_SIZE 128
313 #define LINUX_SI_PAD_SIZE ((LINUX_SI_MAX_SIZE/sizeof(l_int)) - 3)
314
315 typedef union l_sigval {
316 l_int sival_int;
317 l_uintptr_t sival_ptr;
318 } l_sigval_t;
319
320 typedef struct l_siginfo {
321 l_int lsi_signo;
322 l_int lsi_errno;
323 l_int lsi_code;
324 union {
325 l_int _pad[LINUX_SI_PAD_SIZE];
326
327 struct {
328 l_pid_t _pid;
329 l_uid_t _uid;
330 } _kill;
331
332 struct {
333 l_timer_t _tid;
334 l_int _overrun;
335 char _pad[sizeof(l_uid_t) - sizeof(l_int)];
336 l_sigval_t _sigval;
337 l_int _sys_private;
338 } _timer;
339
340 struct {
341 l_pid_t _pid; /* sender's pid */
342 l_uid_t _uid; /* sender's uid */
343 l_sigval_t _sigval;
344 } _rt;
345
346 struct {
347 l_pid_t _pid; /* which child */
348 l_uid_t _uid; /* sender's uid */
349 l_int _status; /* exit code */
350 l_clock_t _utime;
351 l_clock_t _stime;
352 } _sigchld;
353
354 struct {
355 l_uintptr_t _addr; /* Faulting insn/memory ref. */
356 } _sigfault;
357
358 struct {
359 l_long _band; /* POLL_IN,POLL_OUT,POLL_MSG */
360 l_int _fd;
361 } _sigpoll;
362 } _sifields;
363 } l_siginfo_t;
364
365 #define lsi_pid _sifields._kill._pid
366 #define lsi_uid _sifields._kill._uid
367 #define lsi_tid _sifields._timer._tid
368 #define lsi_overrun _sifields._timer._overrun
369 #define lsi_sys_private _sifields._timer._sys_private
370 #define lsi_status _sifields._sigchld._status
371 #define lsi_utime _sifields._sigchld._utime
372 #define lsi_stime _sifields._sigchld._stime
373 #define lsi_value _sifields._rt._sigval
374 #define lsi_int _sifields._rt._sigval.sival_int
375 #define lsi_ptr _sifields._rt._sigval.sival_ptr
376 #define lsi_addr _sifields._sigfault._addr
377 #define lsi_band _sifields._sigpoll._band
378 #define lsi_fd _sifields._sigpoll._fd
379
380 struct l_fpreg {
381 u_int16_t significand[4];
382 u_int16_t exponent;
383 };
384
385 struct l_fpxreg {
386 u_int16_t significand[4];
387 u_int16_t exponent;
388 u_int16_t padding[3];
389 };
390
391 struct l_xmmreg {
392 u_int32_t element[4];
393 };
394
395 struct l_fpstate {
396 /* Regular FPU environment */
397 u_int32_t cw;
398 u_int32_t sw;
399 u_int32_t tag;
400 u_int32_t ipoff;
401 u_int32_t cssel;
402 u_int32_t dataoff;
403 u_int32_t datasel;
404 struct l_fpreg _st[8];
405 u_int16_t status;
406 u_int16_t magic; /* 0xffff = regular FPU data */
407
408 /* FXSR FPU environment */
409 u_int32_t _fxsr_env[6]; /* env is ignored. */
410 u_int32_t mxcsr;
411 u_int32_t reserved;
412 struct l_fpxreg _fxsr_st[8]; /* reg data is ignored. */
413 struct l_xmmreg _xmm[8];
414 u_int32_t padding[56];
415 };
416
417 /*
418 * We make the stack look like Linux expects it when calling a signal
419 * handler, but use the BSD way of calling the handler and sigreturn().
420 * This means that we need to pass the pointer to the handler too.
421 * It is appended to the frame to not interfere with the rest of it.
422 */
423 struct l_sigframe {
424 l_int sf_sig;
425 struct l_sigcontext sf_sc;
426 struct l_fpstate sf_fpstate;
427 l_uint sf_extramask[LINUX_NSIG_WORDS-1];
428 l_handler_t sf_handler;
429 };
430
431 struct l_rt_sigframe {
432 l_int sf_sig;
433 l_siginfo_t *sf_siginfo;
434 struct l_ucontext *sf_ucontext;
435 l_siginfo_t sf_si;
436 struct l_ucontext sf_sc;
437 l_handler_t sf_handler;
438 };
439
440 extern struct sysentvec linux_sysvec;
441
442 /*
443 * arch specific open/fcntl flags
444 */
445 #define LINUX_F_GETLK64 12
446 #define LINUX_F_SETLK64 13
447 #define LINUX_F_SETLKW64 14
448
449 union l_semun {
450 l_int val;
451 struct l_semid_ds *buf;
452 l_ushort *array;
453 struct l_seminfo *__buf;
454 void *__pad;
455 };
456
457 struct l_sockaddr {
458 l_ushort sa_family;
459 char sa_data[14];
460 };
461
462 struct l_ifmap {
463 l_ulong mem_start;
464 l_ulong mem_end;
465 l_ushort base_addr;
466 u_char irq;
467 u_char dma;
468 u_char port;
469 };
470
471 #define LINUX_IFHWADDRLEN 6
472 #define LINUX_IFNAMSIZ 16
473
474 struct l_ifreq {
475 union {
476 char ifrn_name[LINUX_IFNAMSIZ];
477 } ifr_ifrn;
478
479 union {
480 struct l_sockaddr ifru_addr;
481 struct l_sockaddr ifru_dstaddr;
482 struct l_sockaddr ifru_broadaddr;
483 struct l_sockaddr ifru_netmask;
484 struct l_sockaddr ifru_hwaddr;
485 l_short ifru_flags[1];
486 l_int ifru_ivalue;
487 l_int ifru_mtu;
488 struct l_ifmap ifru_map;
489 char ifru_slave[LINUX_IFNAMSIZ];
490 l_caddr_t ifru_data;
491 } ifr_ifru;
492 };
493
494 #define ifr_name ifr_ifrn.ifrn_name /* Interface name */
495 #define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
496 #define ifr_ifindex ifr_ifru.ifru_ivalue /* Interface index */
497
498 /*
499 * poll()
500 */
501 #define LINUX_POLLIN 0x0001
502 #define LINUX_POLLPRI 0x0002
503 #define LINUX_POLLOUT 0x0004
504 #define LINUX_POLLERR 0x0008
505 #define LINUX_POLLHUP 0x0010
506 #define LINUX_POLLNVAL 0x0020
507 #define LINUX_POLLRDNORM 0x0040
508 #define LINUX_POLLRDBAND 0x0080
509 #define LINUX_POLLWRNORM 0x0100
510 #define LINUX_POLLWRBAND 0x0200
511 #define LINUX_POLLMSG 0x0400
512
513 struct l_pollfd {
514 l_int fd;
515 l_short events;
516 l_short revents;
517 };
518
519 struct l_user_desc {
520 l_uint entry_number;
521 l_uint base_addr;
522 l_uint limit;
523 l_uint seg_32bit:1;
524 l_uint contents:2;
525 l_uint read_exec_only:1;
526 l_uint limit_in_pages:1;
527 l_uint seg_not_present:1;
528 l_uint useable:1;
529 };
530
531 struct l_desc_struct {
532 unsigned long a, b;
533 };
534
535
536 #define LINUX_LOWERWORD 0x0000ffff
537
538 /*
539 * Macros which does the same thing as those in Linux include/asm-um/ldt-i386.h.
540 * These convert Linux user space descriptor to machine one.
541 */
542 #define LINUX_LDT_entry_a(info) \
543 ((((info)->base_addr & LINUX_LOWERWORD) << 16) | \
544 ((info)->limit & LINUX_LOWERWORD))
545
546 #define LINUX_ENTRY_B_READ_EXEC_ONLY 9
547 #define LINUX_ENTRY_B_CONTENTS 10
548 #define LINUX_ENTRY_B_SEG_NOT_PRESENT 15
549 #define LINUX_ENTRY_B_BASE_ADDR 16
550 #define LINUX_ENTRY_B_USEABLE 20
551 #define LINUX_ENTRY_B_SEG32BIT 22
552 #define LINUX_ENTRY_B_LIMIT 23
553
554 #define LINUX_LDT_entry_b(info) \
555 (((info)->base_addr & 0xff000000) | \
556 ((info)->limit & 0xf0000) | \
557 ((info)->contents << LINUX_ENTRY_B_CONTENTS) | \
558 (((info)->seg_not_present == 0) << LINUX_ENTRY_B_SEG_NOT_PRESENT) | \
559 (((info)->base_addr & 0x00ff0000) >> LINUX_ENTRY_B_BASE_ADDR) | \
560 (((info)->read_exec_only == 0) << LINUX_ENTRY_B_READ_EXEC_ONLY) | \
561 ((info)->seg_32bit << LINUX_ENTRY_B_SEG32BIT) | \
562 ((info)->useable << LINUX_ENTRY_B_USEABLE) | \
563 ((info)->limit_in_pages << LINUX_ENTRY_B_LIMIT) | 0x7000)
564
565 #define LINUX_LDT_empty(info) \
566 ((info)->base_addr == 0 && \
567 (info)->limit == 0 && \
568 (info)->contents == 0 && \
569 (info)->seg_not_present == 1 && \
570 (info)->read_exec_only == 1 && \
571 (info)->seg_32bit == 0 && \
572 (info)->limit_in_pages == 0 && \
573 (info)->useable == 0)
574
575 /*
576 * Macros for converting segments.
577 * They do the same as those in arch/i386/kernel/process.c in Linux.
578 */
579 #define LINUX_GET_BASE(desc) \
580 ((((desc)->a >> 16) & LINUX_LOWERWORD) | \
581 (((desc)->b << 16) & 0x00ff0000) | \
582 ((desc)->b & 0xff000000))
583
584 #define LINUX_GET_LIMIT(desc) \
585 (((desc)->a & LINUX_LOWERWORD) | \
586 ((desc)->b & 0xf0000))
587
588 #define LINUX_GET_32BIT(desc) \
589 (((desc)->b >> LINUX_ENTRY_B_SEG32BIT) & 1)
590 #define LINUX_GET_CONTENTS(desc) \
591 (((desc)->b >> LINUX_ENTRY_B_CONTENTS) & 3)
592 #define LINUX_GET_WRITABLE(desc) \
593 (((desc)->b >> LINUX_ENTRY_B_READ_EXEC_ONLY) & 1)
594 #define LINUX_GET_LIMIT_PAGES(desc) \
595 (((desc)->b >> LINUX_ENTRY_B_LIMIT) & 1)
596 #define LINUX_GET_PRESENT(desc) \
597 (((desc)->b >> LINUX_ENTRY_B_SEG_NOT_PRESENT) & 1)
598 #define LINUX_GET_USEABLE(desc) \
599 (((desc)->b >> LINUX_ENTRY_B_USEABLE) & 1)
600
601 #define linux_copyout_rusage(r, u) copyout(r, u, sizeof(*r))
602
603 /* robust futexes */
604 struct linux_robust_list {
605 struct linux_robust_list *next;
606 };
607
608 struct linux_robust_list_head {
609 struct linux_robust_list list;
610 l_long futex_offset;
611 struct linux_robust_list *pending_list;
612 };
613
614 #endif /* !_I386_LINUX_H_ */
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