The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/amd64/linux32/linux.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 2004 Tim J. Robbins
    5  * Copyright (c) 2001 Doug Rabson
    6  * Copyright (c) 1994-1996 Søren Schmidt
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer
   14  *    in this position and unchanged.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   31  *
   32  * $FreeBSD$
   33  */
   34 
   35 #ifndef _AMD64_LINUX_H_
   36 #define _AMD64_LINUX_H_
   37 
   38 #include <sys/abi_compat.h>
   39 
   40 #include <compat/linux/linux.h>
   41 #include <amd64/linux32/linux32_syscall.h>
   42 
   43 #define LINUX_LEGACY_SYSCALLS
   44 
   45 #define LINUX_DTRACE    linuxulator32
   46 
   47 #define LINUX32_MAXDSIZ         (512 * 1024 * 1024)     /* 512MB */
   48 #define LINUX32_MAXSSIZ         (64 * 1024 * 1024)      /* 64MB */
   49 #define LINUX32_MAXVMEM         0                       /* Unlimited */
   50 
   51 /*
   52  * Provide a separate set of types for the Linux types.
   53  */
   54 typedef int             l_int;
   55 typedef int32_t         l_long;
   56 typedef int64_t         l_longlong;
   57 typedef short           l_short;
   58 typedef unsigned int    l_uint;
   59 typedef uint32_t        l_ulong;
   60 typedef uint64_t        l_ulonglong;
   61 typedef unsigned short  l_ushort;
   62 
   63 typedef l_ulong         l_uintptr_t;
   64 typedef l_long          l_clock_t;
   65 typedef l_int           l_daddr_t;
   66 typedef l_ushort        l_dev_t;
   67 typedef l_uint          l_gid_t;
   68 typedef l_ushort        l_gid16_t;
   69 typedef l_ulong         l_ino_t;
   70 typedef l_int           l_key_t;
   71 typedef l_longlong      l_loff_t;
   72 typedef l_ushort        l_mode_t;
   73 typedef l_long          l_off_t;
   74 typedef l_int           l_pid_t;
   75 typedef l_uint          l_size_t;
   76 typedef l_long          l_suseconds_t;
   77 typedef l_long          l_time_t;
   78 typedef l_longlong      l_time64_t;
   79 typedef l_uint          l_uid_t;
   80 typedef l_ushort        l_uid16_t;
   81 typedef l_int           l_timer_t;
   82 typedef l_int           l_mqd_t;
   83 typedef l_ulong         l_fd_mask;
   84 
   85 #include <compat/linux/linux_siginfo.h>
   86 
   87 typedef struct {
   88         l_int           val[2];
   89 } l_fsid_t;
   90 
   91 typedef struct {
   92         l_time_t        tv_sec;
   93         l_suseconds_t   tv_usec;
   94 } l_timeval;
   95 
   96 typedef struct {
   97         l_time64_t      tv_sec;
   98         l_time64_t      tv_usec;
   99 } l_sock_timeval;
  100 
  101 #define l_fd_set        fd_set
  102 
  103 /*
  104  * Miscellaneous
  105  */
  106 #define LINUX_AT_COUNT          21      /* Count of used aux entry types.
  107                                          * Keep this synchronized with
  108                                          * linux_fixup_elf() code.
  109                                          */
  110 struct l___sysctl_args
  111 {
  112         l_uintptr_t     name;
  113         l_int           nlen;
  114         l_uintptr_t     oldval;
  115         l_uintptr_t     oldlenp;
  116         l_uintptr_t     newval;
  117         l_size_t        newlen;
  118         l_ulong         __spare[4];
  119 };
  120 
  121 /* Resource limits */
  122 #define LINUX_RLIMIT_CPU        0
  123 #define LINUX_RLIMIT_FSIZE      1
  124 #define LINUX_RLIMIT_DATA       2
  125 #define LINUX_RLIMIT_STACK      3
  126 #define LINUX_RLIMIT_CORE       4
  127 #define LINUX_RLIMIT_RSS        5
  128 #define LINUX_RLIMIT_NPROC      6
  129 #define LINUX_RLIMIT_NOFILE     7
  130 #define LINUX_RLIMIT_MEMLOCK    8
  131 #define LINUX_RLIMIT_AS         9       /* Address space limit */
  132 
  133 #define LINUX_RLIM_NLIMITS      10
  134 
  135 struct l_rlimit {
  136         l_ulong rlim_cur;
  137         l_ulong rlim_max;
  138 };
  139 
  140 struct l_rusage {
  141         l_timeval ru_utime;
  142         l_timeval ru_stime;
  143         l_long  ru_maxrss;
  144         l_long  ru_ixrss;
  145         l_long  ru_idrss;
  146         l_long  ru_isrss;
  147         l_long  ru_minflt;
  148         l_long  ru_majflt;
  149         l_long  ru_nswap;
  150         l_long  ru_inblock;
  151         l_long  ru_oublock;
  152         l_long  ru_msgsnd;
  153         l_long  ru_msgrcv;
  154         l_long  ru_nsignals;
  155         l_long  ru_nvcsw;
  156         l_long  ru_nivcsw;
  157 };
  158 
  159 struct l_mmap_argv {
  160         l_uintptr_t     addr;
  161         l_size_t        len;
  162         l_int           prot;
  163         l_int           flags;
  164         l_int           fd;
  165         l_ulong         pgoff;
  166 };
  167 
  168 /*
  169  * stat family of syscalls
  170  */
  171 struct l_timespec {
  172         l_time_t        tv_sec;
  173         l_long          tv_nsec;
  174 };
  175 
  176 /* __kernel_timespec */
  177 struct l_timespec64 {
  178         l_time64_t      tv_sec;
  179         l_longlong      tv_nsec;
  180 };
  181 
  182 struct l_newstat {
  183         l_ushort        st_dev;
  184         l_ushort        __pad1;
  185         l_ulong         st_ino;
  186         l_ushort        st_mode;
  187         l_ushort        st_nlink;
  188         l_ushort        st_uid;
  189         l_ushort        st_gid;
  190         l_ushort        st_rdev;
  191         l_ushort        __pad2;
  192         l_ulong         st_size;
  193         l_ulong         st_blksize;
  194         l_ulong         st_blocks;
  195         struct l_timespec       st_atim;
  196         struct l_timespec       st_mtim;
  197         struct l_timespec       st_ctim;
  198         l_ulong         __unused4;
  199         l_ulong         __unused5;
  200 };
  201 
  202 struct l_stat {
  203         l_ushort        st_dev;
  204         l_ulong         st_ino;
  205         l_ushort        st_mode;
  206         l_ushort        st_nlink;
  207         l_ushort        st_uid;
  208         l_ushort        st_gid;
  209         l_ushort        st_rdev;
  210         l_long          st_size;
  211         struct l_timespec       st_atim;
  212         struct l_timespec       st_mtim;
  213         struct l_timespec       st_ctim;
  214         l_long          st_blksize;
  215         l_long          st_blocks;
  216         l_ulong         st_flags;
  217         l_ulong         st_gen;
  218 };
  219 
  220 struct l_stat64 {
  221         l_ushort        st_dev;
  222         u_char          __pad0[10];
  223         l_ulong         __st_ino;
  224         l_uint          st_mode;
  225         l_uint          st_nlink;
  226         l_ulong         st_uid;
  227         l_ulong         st_gid;
  228         l_ushort        st_rdev;
  229         u_char          __pad3[10];
  230         l_longlong      st_size;
  231         l_ulong         st_blksize;
  232         l_ulong         st_blocks;
  233         l_ulong         __pad4;
  234         struct l_timespec       st_atim;
  235         struct l_timespec       st_mtim;
  236         struct l_timespec       st_ctim;
  237         l_ulonglong     st_ino;
  238 } __packed;
  239 
  240 struct l_statfs64 {
  241         l_int           f_type;
  242         l_int           f_bsize;
  243         uint64_t        f_blocks;
  244         uint64_t        f_bfree;
  245         uint64_t        f_bavail;
  246         uint64_t        f_files;
  247         uint64_t        f_ffree;
  248         l_fsid_t        f_fsid;
  249         l_int           f_namelen;
  250         l_int           f_frsize;
  251         l_int           f_flags;
  252         l_int           f_spare[4];
  253 } __packed;
  254 
  255 /* sigaction flags */
  256 #define LINUX_SA_NOCLDSTOP      0x00000001
  257 #define LINUX_SA_NOCLDWAIT      0x00000002
  258 #define LINUX_SA_SIGINFO        0x00000004
  259 #define LINUX_SA_RESTORER       0x04000000
  260 #define LINUX_SA_ONSTACK        0x08000000
  261 #define LINUX_SA_RESTART        0x10000000
  262 #define LINUX_SA_INTERRUPT      0x20000000
  263 #define LINUX_SA_NOMASK         0x40000000
  264 #define LINUX_SA_ONESHOT        0x80000000
  265 
  266 /* sigaltstack */
  267 #define LINUX_MINSIGSTKSZ       2048
  268 
  269 typedef l_uintptr_t l_handler_t;
  270 typedef l_ulong l_osigset_t;
  271 
  272 typedef struct {
  273         l_handler_t     lsa_handler;
  274         l_osigset_t     lsa_mask;
  275         l_ulong         lsa_flags;
  276         l_uintptr_t     lsa_restorer;
  277 } l_osigaction_t;
  278 
  279 typedef struct {
  280         l_handler_t     lsa_handler;
  281         l_ulong         lsa_flags;
  282         l_uintptr_t     lsa_restorer;
  283         l_sigset_t      lsa_mask;
  284 } __packed l_sigaction_t;
  285 
  286 typedef struct {
  287         l_uintptr_t     ss_sp;
  288         l_int           ss_flags;
  289         l_size_t        ss_size;
  290 } l_stack_t;
  291 
  292 /*
  293  * arch specific open/fcntl flags
  294  */
  295 #define LINUX_F_GETLK64         12
  296 #define LINUX_F_SETLK64         13
  297 #define LINUX_F_SETLKW64        14
  298 
  299 union l_semun {
  300         l_int           val;
  301         l_uintptr_t     buf;
  302         l_uintptr_t     array;
  303         l_uintptr_t     __buf;
  304         l_uintptr_t     __pad;
  305 };
  306 
  307 struct l_ifmap {
  308         l_ulong         mem_start;
  309         l_ulong         mem_end;
  310         l_ushort        base_addr;
  311         u_char          irq;
  312         u_char          dma;
  313         u_char          port;
  314         /* 3 bytes spare */
  315 };
  316 
  317 struct l_ifreq {
  318         union {
  319                 char    ifrn_name[LINUX_IFNAMSIZ];
  320         } ifr_ifrn;
  321 
  322         union {
  323                 struct l_sockaddr       ifru_addr;
  324                 struct l_sockaddr       ifru_dstaddr;
  325                 struct l_sockaddr       ifru_broadaddr;
  326                 struct l_sockaddr       ifru_netmask;
  327                 struct l_sockaddr       ifru_hwaddr;
  328                 l_short         ifru_flags[1];
  329                 l_int           ifru_ivalue;
  330                 l_int           ifru_mtu;
  331                 struct l_ifmap  ifru_map;
  332                 char            ifru_slave[LINUX_IFNAMSIZ];
  333                 l_uintptr_t     ifru_data;
  334         } ifr_ifru;
  335 };
  336 
  337 #define ifr_name        ifr_ifrn.ifrn_name      /* Interface name */
  338 #define ifr_hwaddr      ifr_ifru.ifru_hwaddr    /* MAC address */
  339 #define ifr_ifindex     ifr_ifru.ifru_ivalue    /* Interface index */
  340 
  341 struct l_ifconf {
  342         int     ifc_len;
  343         union {
  344                 l_uintptr_t     ifcu_buf;
  345                 l_uintptr_t     ifcu_req;
  346         } ifc_ifcu;
  347 };
  348 
  349 #define ifc_buf         ifc_ifcu.ifcu_buf
  350 #define ifc_req         ifc_ifcu.ifcu_req
  351 
  352 struct l_user_desc {
  353         l_uint          entry_number;
  354         l_uint          base_addr;
  355         l_uint          limit;
  356         l_uint          seg_32bit:1;
  357         l_uint          contents:2;
  358         l_uint          read_exec_only:1;
  359         l_uint          limit_in_pages:1;
  360         l_uint          seg_not_present:1;
  361         l_uint          useable:1;
  362 };
  363 
  364 #define LINUX_LOWERWORD 0x0000ffff
  365 
  366 /*
  367  * Macros which does the same thing as those in Linux include/asm-um/ldt-i386.h.
  368  * These convert Linux user space descriptor to machine one.
  369  */
  370 #define LINUX_LDT_entry_a(info)                                 \
  371         ((((info)->base_addr & LINUX_LOWERWORD) << 16) |        \
  372         ((info)->limit & LINUX_LOWERWORD))
  373 
  374 #define LINUX_ENTRY_B_READ_EXEC_ONLY    9
  375 #define LINUX_ENTRY_B_CONTENTS          10
  376 #define LINUX_ENTRY_B_SEG_NOT_PRESENT   15
  377 #define LINUX_ENTRY_B_BASE_ADDR         16
  378 #define LINUX_ENTRY_B_USEABLE           20
  379 #define LINUX_ENTRY_B_SEG32BIT          22
  380 #define LINUX_ENTRY_B_LIMIT             23
  381 
  382 #define LINUX_LDT_entry_b(info)                                                 \
  383         (((info)->base_addr & 0xff000000) |                                     \
  384         ((info)->limit & 0xf0000) |                                             \
  385         ((info)->contents << LINUX_ENTRY_B_CONTENTS) |                          \
  386         (((info)->seg_not_present == 0) << LINUX_ENTRY_B_SEG_NOT_PRESENT) |     \
  387         (((info)->base_addr & 0x00ff0000) >> LINUX_ENTRY_B_BASE_ADDR) |         \
  388         (((info)->read_exec_only == 0) << LINUX_ENTRY_B_READ_EXEC_ONLY) |       \
  389         ((info)->seg_32bit << LINUX_ENTRY_B_SEG32BIT) |                         \
  390         ((info)->useable << LINUX_ENTRY_B_USEABLE) |                            \
  391         ((info)->limit_in_pages << LINUX_ENTRY_B_LIMIT) | 0x7000)
  392 
  393 #define LINUX_LDT_empty(info)           \
  394         ((info)->base_addr == 0 &&      \
  395         (info)->limit == 0 &&           \
  396         (info)->contents == 0 &&        \
  397         (info)->seg_not_present == 1 && \
  398         (info)->read_exec_only == 1 &&  \
  399         (info)->seg_32bit == 0 &&       \
  400         (info)->limit_in_pages == 0 &&  \
  401         (info)->useable == 0)
  402 
  403 /*
  404  * Macros for converting segments.
  405  * They do the same as those in arch/i386/kernel/process.c in Linux.
  406  */
  407 #define LINUX_GET_BASE(desc)                            \
  408         ((((desc)->a >> 16) & LINUX_LOWERWORD) |        \
  409         (((desc)->b << 16) & 0x00ff0000) |              \
  410         ((desc)->b & 0xff000000))
  411 
  412 #define LINUX_GET_LIMIT(desc)                   \
  413         (((desc)->a & LINUX_LOWERWORD) |        \
  414         ((desc)->b & 0xf0000))
  415 
  416 #define LINUX_GET_32BIT(desc)           \
  417         (((desc)->b >> LINUX_ENTRY_B_SEG32BIT) & 1)
  418 #define LINUX_GET_CONTENTS(desc)        \
  419         (((desc)->b >> LINUX_ENTRY_B_CONTENTS) & 3)
  420 #define LINUX_GET_WRITABLE(desc)        \
  421         (((desc)->b >> LINUX_ENTRY_B_READ_EXEC_ONLY) & 1)
  422 #define LINUX_GET_LIMIT_PAGES(desc)     \
  423         (((desc)->b >> LINUX_ENTRY_B_LIMIT) & 1)
  424 #define LINUX_GET_PRESENT(desc)         \
  425         (((desc)->b >> LINUX_ENTRY_B_SEG_NOT_PRESENT) & 1)
  426 #define LINUX_GET_USEABLE(desc)         \
  427         (((desc)->b >> LINUX_ENTRY_B_USEABLE) & 1)
  428 
  429 #ifdef _KERNEL
  430 struct iovec;
  431 struct uio;
  432 
  433 struct l_iovec32 {
  434         uint32_t        iov_base;
  435         l_size_t        iov_len;
  436 };
  437 
  438 int linux32_copyiniov(struct l_iovec32 *iovp32, l_ulong iovcnt,
  439                             struct iovec **iovp, int error);
  440 int linux32_copyinuio(struct l_iovec32 *iovp, l_ulong iovcnt,
  441                             struct uio **uiop);
  442 int linux_copyout_rusage(struct rusage *ru, void *uaddr);
  443 #endif /* _KERNEL */
  444 
  445 /* robust futexes */
  446 struct linux_robust_list {
  447         l_uintptr_t                     next;
  448 };
  449 
  450 struct linux_robust_list_head {
  451         struct linux_robust_list        list;
  452         l_long                          futex_offset;
  453         l_uintptr_t                     pending_list;
  454 };
  455 
  456 /* This corresponds to 'struct user_regs_struct32' in Linux. */
  457 struct linux_pt_regset32 {
  458         l_uint ebx;
  459         l_uint ecx;
  460         l_uint edx;
  461         l_uint esi;
  462         l_uint edi;
  463         l_uint ebp;
  464         l_uint eax;
  465         l_uint ds;
  466         l_uint es;
  467         l_uint fs;
  468         l_uint gs;
  469         l_uint orig_eax;
  470         l_uint eip;
  471         l_uint cs;
  472         l_uint eflags;
  473         l_uint esp;
  474         l_uint ss;
  475 };
  476 
  477 #ifdef _KERNEL
  478 struct reg32;
  479 
  480 void    bsd_to_linux_regset32(const struct reg32 *b_reg,
  481             struct linux_pt_regset32 *l_regset);
  482 
  483 extern bool linux32_emulate_i386;
  484 #endif /* _KERNEL */
  485 
  486 #endif /* !_AMD64_LINUX_H_ */

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