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: stable/12/sys/amd64/linux32/linux.h 335201 2018-06-15 14:41:51Z emaste $
   33  */
   34 
   35 #ifndef _AMD64_LINUX_H_
   36 #define _AMD64_LINUX_H_
   37 
   38 #include <compat/linux/linux.h>
   39 #include <amd64/linux32/linux32_syscall.h>
   40 
   41 #define LINUX_LEGACY_SYSCALLS
   42 
   43 /*
   44  * debugging support
   45  */
   46 extern u_char linux_debug_map[];
   47 #define ldebug(name)    isclr(linux_debug_map, LINUX32_SYS_linux_ ## name)
   48 #define ARGS(nm, fmt)   "linux(%ld/%ld): "#nm"("fmt")\n",                       \
   49                         (long)td->td_proc->p_pid, (long)td->td_tid
   50 #define LMSG(fmt)       "linux(%ld/%ld): "fmt"\n",                              \
   51                         (long)td->td_proc->p_pid, (long)td->td_tid
   52 #define LINUX_DTRACE    linuxulator32
   53 
   54 #define LINUX32_MAXUSER         ((1ul << 32) - PAGE_SIZE)
   55 #define LINUX32_SHAREDPAGE      (LINUX32_MAXUSER - PAGE_SIZE)
   56 #define LINUX32_USRSTACK        LINUX32_SHAREDPAGE
   57 
   58 /* XXX 16 = sizeof(linux32_ps_strings) */
   59 #define LINUX32_PS_STRINGS      (LINUX32_USRSTACK - 16)
   60 #define LINUX32_MAXDSIZ         (512 * 1024 * 1024)     /* 512MB */
   61 #define LINUX32_MAXSSIZ         (64 * 1024 * 1024)      /* 64MB */
   62 #define LINUX32_MAXVMEM         0                       /* Unlimited */
   63 
   64 #define PTRIN(v)        (void *)(uintptr_t)(v)
   65 #define PTROUT(v)       (l_uintptr_t)(uintptr_t)(v)
   66 
   67 #define CP(src,dst,fld) do { (dst).fld = (src).fld; } while (0)
   68 #define CP2(src,dst,sfld,dfld) do { (dst).dfld = (src).sfld; } while (0)
   69 #define PTRIN_CP(src,dst,fld) \
   70         do { (dst).fld = PTRIN((src).fld); } while (0)
   71 
   72 /*
   73  * Provide a separate set of types for the Linux types.
   74  */
   75 typedef int             l_int;
   76 typedef int32_t         l_long;
   77 typedef int64_t         l_longlong;
   78 typedef short           l_short;
   79 typedef unsigned int    l_uint;
   80 typedef uint32_t        l_ulong;
   81 typedef uint64_t        l_ulonglong;
   82 typedef unsigned short  l_ushort;
   83 
   84 typedef l_ulong         l_uintptr_t;
   85 typedef l_long          l_clock_t;
   86 typedef l_int           l_daddr_t;
   87 typedef l_ushort        l_dev_t;
   88 typedef l_uint          l_gid_t;
   89 typedef l_ushort        l_gid16_t;
   90 typedef l_ulong         l_ino_t;
   91 typedef l_int           l_key_t;
   92 typedef l_longlong      l_loff_t;
   93 typedef l_ushort        l_mode_t;
   94 typedef l_long          l_off_t;
   95 typedef l_int           l_pid_t;
   96 typedef l_uint          l_size_t;
   97 typedef l_long          l_suseconds_t;
   98 typedef l_long          l_time_t;
   99 typedef l_uint          l_uid_t;
  100 typedef l_ushort        l_uid16_t;
  101 typedef l_int           l_timer_t;
  102 typedef l_int           l_mqd_t;
  103 typedef l_ulong         l_fd_mask;
  104 
  105 typedef struct {
  106         l_int           val[2];
  107 } __packed l_fsid_t;
  108 
  109 typedef struct {
  110         l_time_t        tv_sec;
  111         l_suseconds_t   tv_usec;
  112 } l_timeval;
  113 
  114 #define l_fd_set        fd_set
  115 
  116 /*
  117  * Miscellaneous
  118  */
  119 #define LINUX_AT_COUNT          20      /* Count of used aux entry types.
  120                                          * Keep this synchronized with
  121                                          * linux_fixup_elf() code.
  122                                          */
  123 struct l___sysctl_args
  124 {
  125         l_uintptr_t     name;
  126         l_int           nlen;
  127         l_uintptr_t     oldval;
  128         l_uintptr_t     oldlenp;
  129         l_uintptr_t     newval;
  130         l_size_t        newlen;
  131         l_ulong         __spare[4];
  132 } __packed;
  133 
  134 /* Resource limits */
  135 #define LINUX_RLIMIT_CPU        0
  136 #define LINUX_RLIMIT_FSIZE      1
  137 #define LINUX_RLIMIT_DATA       2
  138 #define LINUX_RLIMIT_STACK      3
  139 #define LINUX_RLIMIT_CORE       4
  140 #define LINUX_RLIMIT_RSS        5
  141 #define LINUX_RLIMIT_NPROC      6
  142 #define LINUX_RLIMIT_NOFILE     7
  143 #define LINUX_RLIMIT_MEMLOCK    8
  144 #define LINUX_RLIMIT_AS         9       /* Address space limit */
  145 
  146 #define LINUX_RLIM_NLIMITS      10
  147 
  148 struct l_rlimit {
  149         l_ulong rlim_cur;
  150         l_ulong rlim_max;
  151 } __packed;
  152 
  153 struct l_rusage {
  154         l_timeval ru_utime;
  155         l_timeval ru_stime;
  156         l_long  ru_maxrss;
  157         l_long  ru_ixrss;
  158         l_long  ru_idrss;
  159         l_long  ru_isrss;
  160         l_long  ru_minflt;
  161         l_long  ru_majflt;
  162         l_long  ru_nswap;
  163         l_long  ru_inblock;
  164         l_long  ru_oublock;
  165         l_long  ru_msgsnd;
  166         l_long  ru_msgrcv;
  167         l_long  ru_nsignals;
  168         l_long  ru_nvcsw;
  169         l_long  ru_nivcsw;
  170 } __packed;
  171 
  172 struct l_mmap_argv {
  173         l_uintptr_t     addr;
  174         l_size_t        len;
  175         l_int           prot;
  176         l_int           flags;
  177         l_int           fd;
  178         l_ulong         pgoff;
  179 };
  180 
  181 /*
  182  * stat family of syscalls
  183  */
  184 struct l_timespec {
  185         l_time_t        tv_sec;
  186         l_long          tv_nsec;
  187 } __packed;
  188 
  189 struct l_newstat {
  190         l_ushort        st_dev;
  191         l_ushort        __pad1;
  192         l_ulong         st_ino;
  193         l_ushort        st_mode;
  194         l_ushort        st_nlink;
  195         l_ushort        st_uid;
  196         l_ushort        st_gid;
  197         l_ushort        st_rdev;
  198         l_ushort        __pad2;
  199         l_ulong         st_size;
  200         l_ulong         st_blksize;
  201         l_ulong         st_blocks;
  202         struct l_timespec       st_atim;
  203         struct l_timespec       st_mtim;
  204         struct l_timespec       st_ctim;
  205         l_ulong         __unused4;
  206         l_ulong         __unused5;
  207 } __packed;
  208 
  209 struct l_stat {
  210         l_ushort        st_dev;
  211         l_ulong         st_ino;
  212         l_ushort        st_mode;
  213         l_ushort        st_nlink;
  214         l_ushort        st_uid;
  215         l_ushort        st_gid;
  216         l_ushort        st_rdev;
  217         l_long          st_size;
  218         struct l_timespec       st_atim;
  219         struct l_timespec       st_mtim;
  220         struct l_timespec       st_ctim;
  221         l_long          st_blksize;
  222         l_long          st_blocks;
  223         l_ulong         st_flags;
  224         l_ulong         st_gen;
  225 };
  226 
  227 struct l_stat64 {
  228         l_ushort        st_dev;
  229         u_char          __pad0[10];
  230         l_ulong         __st_ino;
  231         l_uint          st_mode;
  232         l_uint          st_nlink;
  233         l_ulong         st_uid;
  234         l_ulong         st_gid;
  235         l_ushort        st_rdev;
  236         u_char          __pad3[10];
  237         l_longlong      st_size;
  238         l_ulong         st_blksize;
  239         l_ulong         st_blocks;
  240         l_ulong         __pad4;
  241         struct l_timespec       st_atim;
  242         struct l_timespec       st_mtim;
  243         struct l_timespec       st_ctim;
  244         l_ulonglong     st_ino;
  245 } __packed;
  246 
  247 struct l_statfs64 {
  248         l_int           f_type;
  249         l_int           f_bsize;
  250         uint64_t        f_blocks;
  251         uint64_t        f_bfree;
  252         uint64_t        f_bavail;
  253         uint64_t        f_files;
  254         uint64_t        f_ffree;
  255         l_fsid_t        f_fsid;
  256         l_int           f_namelen;
  257         l_int           f_frsize;
  258         l_int           f_flags;
  259         l_int           f_spare[4];
  260 } __packed;
  261 
  262 /* sigaction flags */
  263 #define LINUX_SA_NOCLDSTOP      0x00000001
  264 #define LINUX_SA_NOCLDWAIT      0x00000002
  265 #define LINUX_SA_SIGINFO        0x00000004
  266 #define LINUX_SA_RESTORER       0x04000000
  267 #define LINUX_SA_ONSTACK        0x08000000
  268 #define LINUX_SA_RESTART        0x10000000
  269 #define LINUX_SA_INTERRUPT      0x20000000
  270 #define LINUX_SA_NOMASK         0x40000000
  271 #define LINUX_SA_ONESHOT        0x80000000
  272 
  273 /* sigprocmask actions */
  274 #define LINUX_SIG_BLOCK         0
  275 #define LINUX_SIG_UNBLOCK       1
  276 #define LINUX_SIG_SETMASK       2
  277 
  278 /* sigaltstack */
  279 #define LINUX_MINSIGSTKSZ       2048
  280 
  281 typedef l_uintptr_t l_handler_t;
  282 typedef l_ulong l_osigset_t;
  283 
  284 typedef struct {
  285         l_handler_t     lsa_handler;
  286         l_osigset_t     lsa_mask;
  287         l_ulong         lsa_flags;
  288         l_uintptr_t     lsa_restorer;
  289 } __packed l_osigaction_t;
  290 
  291 typedef struct {
  292         l_handler_t     lsa_handler;
  293         l_ulong         lsa_flags;
  294         l_uintptr_t     lsa_restorer;
  295         l_sigset_t      lsa_mask;
  296 } __packed l_sigaction_t;
  297 
  298 typedef struct {
  299         l_uintptr_t     ss_sp;
  300         l_int           ss_flags;
  301         l_size_t        ss_size;
  302 } __packed l_stack_t;
  303 
  304 /* The Linux sigcontext, pretty much a standard 386 trapframe. */
  305 struct l_sigcontext {
  306         l_uint          sc_gs;
  307         l_uint          sc_fs;
  308         l_uint          sc_es;
  309         l_uint          sc_ds;
  310         l_uint          sc_edi;
  311         l_uint          sc_esi;
  312         l_uint          sc_ebp;
  313         l_uint          sc_esp;
  314         l_uint          sc_ebx;
  315         l_uint          sc_edx;
  316         l_uint          sc_ecx;
  317         l_uint          sc_eax;
  318         l_uint          sc_trapno;
  319         l_uint          sc_err;
  320         l_uint          sc_eip;
  321         l_uint          sc_cs;
  322         l_uint          sc_eflags;
  323         l_uint          sc_esp_at_signal;
  324         l_uint          sc_ss;
  325         l_uint          sc_387;
  326         l_uint          sc_mask;
  327         l_uint          sc_cr2;
  328 } __packed;
  329 
  330 struct l_ucontext {
  331         l_ulong         uc_flags;
  332         l_uintptr_t     uc_link;
  333         l_stack_t       uc_stack;
  334         struct l_sigcontext     uc_mcontext;
  335         l_sigset_t      uc_sigmask;
  336 } __packed;
  337 
  338 #define LINUX_SI_MAX_SIZE       128
  339 #define LINUX_SI_PAD_SIZE       ((LINUX_SI_MAX_SIZE/sizeof(l_int)) - 3)
  340 
  341 typedef union l_sigval {
  342         l_int           sival_int;
  343         l_uintptr_t     sival_ptr;
  344 } l_sigval_t;
  345 
  346 typedef struct l_siginfo {
  347         l_int           lsi_signo;
  348         l_int           lsi_errno;
  349         l_int           lsi_code;
  350         union {
  351                 l_int   _pad[LINUX_SI_PAD_SIZE];
  352 
  353                 struct {
  354                         l_pid_t         _pid;
  355                         l_uid_t         _uid;
  356                 } __packed _kill;
  357 
  358                 struct {
  359                         l_timer_t       _tid;
  360                         l_int           _overrun;
  361                         char            _pad[sizeof(l_uid_t) - sizeof(l_int)];
  362                         l_sigval_t      _sigval;
  363                         l_int           _sys_private;
  364                 } __packed _timer;
  365 
  366                 struct {
  367                         l_pid_t         _pid;           /* sender's pid */
  368                         l_uid_t         _uid;           /* sender's uid */
  369                         l_sigval_t      _sigval;
  370                 } __packed _rt;
  371 
  372                 struct {
  373                         l_pid_t         _pid;           /* which child */
  374                         l_uid_t         _uid;           /* sender's uid */
  375                         l_int           _status;        /* exit code */
  376                         l_clock_t       _utime;
  377                         l_clock_t       _stime;
  378                 } __packed _sigchld;
  379 
  380                 struct {
  381                         l_uintptr_t     _addr;  /* Faulting insn/memory ref. */
  382                 } __packed _sigfault;
  383 
  384                 struct {
  385                         l_long          _band;  /* POLL_IN,POLL_OUT,POLL_MSG */
  386                         l_int           _fd;
  387                 } __packed _sigpoll;
  388         } _sifields;
  389 } __packed l_siginfo_t;
  390 
  391 #define lsi_pid         _sifields._kill._pid
  392 #define lsi_uid         _sifields._kill._uid
  393 #define lsi_tid         _sifields._timer._tid
  394 #define lsi_overrun     _sifields._timer._overrun
  395 #define lsi_sys_private _sifields._timer._sys_private
  396 #define lsi_status      _sifields._sigchld._status
  397 #define lsi_utime       _sifields._sigchld._utime
  398 #define lsi_stime       _sifields._sigchld._stime
  399 #define lsi_value       _sifields._rt._sigval
  400 #define lsi_int         _sifields._rt._sigval.sival_int
  401 #define lsi_ptr         _sifields._rt._sigval.sival_ptr
  402 #define lsi_addr        _sifields._sigfault._addr
  403 #define lsi_band        _sifields._sigpoll._band
  404 #define lsi_fd          _sifields._sigpoll._fd
  405 
  406 struct l_fpreg {
  407         u_int16_t       significand[4];
  408         u_int16_t       exponent;
  409 } __packed;
  410 
  411 struct l_fpxreg {
  412         u_int16_t       significand[4];
  413         u_int16_t       exponent;
  414         u_int16_t       padding[3];
  415 } __packed;
  416 
  417 struct l_xmmreg {
  418         u_int32_t       element[4];
  419 } __packed;
  420 
  421 struct l_fpstate {
  422         /* Regular FPU environment */
  423         u_int32_t               cw;
  424         u_int32_t               sw;
  425         u_int32_t               tag;
  426         u_int32_t               ipoff;
  427         u_int32_t               cssel;
  428         u_int32_t               dataoff;
  429         u_int32_t               datasel;
  430         struct l_fpreg          _st[8];
  431         u_int16_t               status;
  432         u_int16_t               magic;          /* 0xffff = regular FPU data */
  433 
  434         /* FXSR FPU environment */
  435         u_int32_t               _fxsr_env[6];   /* env is ignored. */
  436         u_int32_t               mxcsr;
  437         u_int32_t               reserved;
  438         struct l_fpxreg         _fxsr_st[8];    /* reg data is ignored. */
  439         struct l_xmmreg         _xmm[8];
  440         u_int32_t               padding[56];
  441 } __packed;
  442 
  443 /*
  444  * We make the stack look like Linux expects it when calling a signal
  445  * handler, but use the BSD way of calling the handler and sigreturn().
  446  * This means that we need to pass the pointer to the handler too.
  447  * It is appended to the frame to not interfere with the rest of it.
  448  */
  449 struct l_sigframe {
  450         l_int                   sf_sig;
  451         struct l_sigcontext     sf_sc;
  452         struct l_fpstate        sf_fpstate;
  453         l_uint                  sf_extramask[1];
  454         l_handler_t             sf_handler;
  455 } __packed;
  456 
  457 struct l_rt_sigframe {
  458         l_int                   sf_sig;
  459         l_uintptr_t             sf_siginfo;
  460         l_uintptr_t             sf_ucontext;
  461         l_siginfo_t             sf_si;
  462         struct l_ucontext       sf_sc;
  463         l_handler_t             sf_handler;
  464 } __packed;
  465 
  466 /*
  467  * arch specific open/fcntl flags
  468  */
  469 #define LINUX_F_GETLK64         12
  470 #define LINUX_F_SETLK64         13
  471 #define LINUX_F_SETLKW64        14
  472 
  473 union l_semun {
  474         l_int           val;
  475         l_uintptr_t     buf;
  476         l_uintptr_t     array;
  477         l_uintptr_t     __buf;
  478         l_uintptr_t     __pad;
  479 } __packed;
  480 
  481 struct l_sockaddr {
  482         l_ushort        sa_family;
  483         char            sa_data[14];
  484 } __packed;
  485 
  486 struct l_ifmap {
  487         l_ulong         mem_start;
  488         l_ulong         mem_end;
  489         l_ushort        base_addr;
  490         u_char          irq;
  491         u_char          dma;
  492         u_char          port;
  493 } __packed;
  494 
  495 #define LINUX_IFHWADDRLEN       6
  496 #define LINUX_IFNAMSIZ          16
  497 
  498 struct l_ifreq {
  499         union {
  500                 char    ifrn_name[LINUX_IFNAMSIZ];
  501         } ifr_ifrn;
  502 
  503         union {
  504                 struct l_sockaddr       ifru_addr;
  505                 struct l_sockaddr       ifru_dstaddr;
  506                 struct l_sockaddr       ifru_broadaddr;
  507                 struct l_sockaddr       ifru_netmask;
  508                 struct l_sockaddr       ifru_hwaddr;
  509                 l_short         ifru_flags[1];
  510                 l_int           ifru_ivalue;
  511                 l_int           ifru_mtu;
  512                 struct l_ifmap  ifru_map;
  513                 char            ifru_slave[LINUX_IFNAMSIZ];
  514                 l_uintptr_t     ifru_data;
  515         } ifr_ifru;
  516 } __packed;
  517 
  518 #define ifr_name        ifr_ifrn.ifrn_name      /* Interface name */
  519 #define ifr_hwaddr      ifr_ifru.ifru_hwaddr    /* MAC address */
  520 #define ifr_ifindex     ifr_ifru.ifru_ivalue    /* Interface index */
  521 
  522 struct l_ifconf {
  523         int     ifc_len;
  524         union {
  525                 l_uintptr_t     ifcu_buf;
  526                 l_uintptr_t     ifcu_req;
  527         } ifc_ifcu;
  528 } __packed;
  529 
  530 #define ifc_buf         ifc_ifcu.ifcu_buf
  531 #define ifc_req         ifc_ifcu.ifcu_req
  532 
  533 /*
  534  * poll()
  535  */
  536 #define LINUX_POLLIN            0x0001
  537 #define LINUX_POLLPRI           0x0002
  538 #define LINUX_POLLOUT           0x0004
  539 #define LINUX_POLLERR           0x0008
  540 #define LINUX_POLLHUP           0x0010
  541 #define LINUX_POLLNVAL          0x0020
  542 #define LINUX_POLLRDNORM        0x0040
  543 #define LINUX_POLLRDBAND        0x0080
  544 #define LINUX_POLLWRNORM        0x0100
  545 #define LINUX_POLLWRBAND        0x0200
  546 #define LINUX_POLLMSG           0x0400
  547 
  548 struct l_pollfd {
  549         l_int           fd;
  550         l_short         events;
  551         l_short         revents;
  552 } __packed;
  553 
  554 struct l_user_desc {
  555         l_uint          entry_number;
  556         l_uint          base_addr;
  557         l_uint          limit;
  558         l_uint          seg_32bit:1;
  559         l_uint          contents:2;
  560         l_uint          read_exec_only:1;
  561         l_uint          limit_in_pages:1;
  562         l_uint          seg_not_present:1;
  563         l_uint          useable:1;
  564 };
  565 
  566 #define LINUX_LOWERWORD 0x0000ffff
  567 
  568 /*
  569  * Macros which does the same thing as those in Linux include/asm-um/ldt-i386.h.
  570  * These convert Linux user space descriptor to machine one.
  571  */
  572 #define LINUX_LDT_entry_a(info)                                 \
  573         ((((info)->base_addr & LINUX_LOWERWORD) << 16) |        \
  574         ((info)->limit & LINUX_LOWERWORD))
  575 
  576 #define LINUX_ENTRY_B_READ_EXEC_ONLY    9
  577 #define LINUX_ENTRY_B_CONTENTS          10
  578 #define LINUX_ENTRY_B_SEG_NOT_PRESENT   15
  579 #define LINUX_ENTRY_B_BASE_ADDR         16
  580 #define LINUX_ENTRY_B_USEABLE           20
  581 #define LINUX_ENTRY_B_SEG32BIT          22
  582 #define LINUX_ENTRY_B_LIMIT             23
  583 
  584 #define LINUX_LDT_entry_b(info)                                                 \
  585         (((info)->base_addr & 0xff000000) |                                     \
  586         ((info)->limit & 0xf0000) |                                             \
  587         ((info)->contents << LINUX_ENTRY_B_CONTENTS) |                          \
  588         (((info)->seg_not_present == 0) << LINUX_ENTRY_B_SEG_NOT_PRESENT) |     \
  589         (((info)->base_addr & 0x00ff0000) >> LINUX_ENTRY_B_BASE_ADDR) |         \
  590         (((info)->read_exec_only == 0) << LINUX_ENTRY_B_READ_EXEC_ONLY) |       \
  591         ((info)->seg_32bit << LINUX_ENTRY_B_SEG32BIT) |                         \
  592         ((info)->useable << LINUX_ENTRY_B_USEABLE) |                            \
  593         ((info)->limit_in_pages << LINUX_ENTRY_B_LIMIT) | 0x7000)
  594 
  595 #define LINUX_LDT_empty(info)           \
  596         ((info)->base_addr == 0 &&      \
  597         (info)->limit == 0 &&           \
  598         (info)->contents == 0 &&        \
  599         (info)->seg_not_present == 1 && \
  600         (info)->read_exec_only == 1 &&  \
  601         (info)->seg_32bit == 0 &&       \
  602         (info)->limit_in_pages == 0 &&  \
  603         (info)->useable == 0)
  604 
  605 /*
  606  * Macros for converting segments.
  607  * They do the same as those in arch/i386/kernel/process.c in Linux.
  608  */
  609 #define LINUX_GET_BASE(desc)                            \
  610         ((((desc)->a >> 16) & LINUX_LOWERWORD) |        \
  611         (((desc)->b << 16) & 0x00ff0000) |              \
  612         ((desc)->b & 0xff000000))
  613 
  614 #define LINUX_GET_LIMIT(desc)                   \
  615         (((desc)->a & LINUX_LOWERWORD) |        \
  616         ((desc)->b & 0xf0000))
  617 
  618 #define LINUX_GET_32BIT(desc)           \
  619         (((desc)->b >> LINUX_ENTRY_B_SEG32BIT) & 1)
  620 #define LINUX_GET_CONTENTS(desc)        \
  621         (((desc)->b >> LINUX_ENTRY_B_CONTENTS) & 3)
  622 #define LINUX_GET_WRITABLE(desc)        \
  623         (((desc)->b >> LINUX_ENTRY_B_READ_EXEC_ONLY) & 1)
  624 #define LINUX_GET_LIMIT_PAGES(desc)     \
  625         (((desc)->b >> LINUX_ENTRY_B_LIMIT) & 1)
  626 #define LINUX_GET_PRESENT(desc)         \
  627         (((desc)->b >> LINUX_ENTRY_B_SEG_NOT_PRESENT) & 1)
  628 #define LINUX_GET_USEABLE(desc)         \
  629         (((desc)->b >> LINUX_ENTRY_B_USEABLE) & 1)
  630 
  631 struct iovec;
  632 struct uio;
  633 
  634 struct l_iovec32 {
  635         uint32_t        iov_base;
  636         l_size_t        iov_len;
  637 };
  638 
  639 int linux32_copyiniov(struct l_iovec32 *iovp32, l_ulong iovcnt,
  640                             struct iovec **iovp, int error);
  641 int linux32_copyinuio(struct l_iovec32 *iovp, l_ulong iovcnt,
  642                             struct uio **uiop);
  643 int linux_copyout_rusage(struct rusage *ru, void *uaddr);
  644 
  645 /* robust futexes */
  646 struct linux_robust_list {
  647         l_uintptr_t                     next;
  648 };
  649 
  650 struct linux_robust_list_head {
  651         struct linux_robust_list        list;
  652         l_long                          futex_offset;
  653         l_uintptr_t                     pending_list;
  654 };
  655 
  656 #endif /* !_AMD64_LINUX_H_ */

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