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