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  * Copyright (c) 2004 Tim J. Robbins
    3  * Copyright (c) 2001 Doug Rabson
    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  *    in this position and unchanged.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. The name of the author may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * $FreeBSD: releng/11.2/sys/amd64/linux32/linux.h 331722 2018-03-29 02:50:57Z eadler $
   31  */
   32 
   33 #ifndef _AMD64_LINUX_H_
   34 #define _AMD64_LINUX_H_
   35 
   36 #include <compat/linux/linux.h>
   37 #include <amd64/linux32/linux32_syscall.h>
   38 
   39 /*
   40  * debugging support
   41  */
   42 extern u_char linux_debug_map[];
   43 #define ldebug(name)    isclr(linux_debug_map, LINUX32_SYS_linux_ ## name)
   44 #define ARGS(nm, fmt)   "linux(%ld/%ld): "#nm"("fmt")\n",                       \
   45                         (long)td->td_proc->p_pid, (long)td->td_tid
   46 #define LMSG(fmt)       "linux(%ld/%ld): "fmt"\n",                              \
   47                         (long)td->td_proc->p_pid, (long)td->td_tid
   48 #define LINUX_DTRACE    linuxulator32
   49 
   50 #define LINUX32_MAXUSER         ((1ul << 32) - PAGE_SIZE)
   51 #define LINUX32_SHAREDPAGE      (LINUX32_MAXUSER - PAGE_SIZE)
   52 #define LINUX32_USRSTACK        LINUX32_SHAREDPAGE
   53 
   54 /* XXX 16 = sizeof(linux32_ps_strings) */
   55 #define LINUX32_PS_STRINGS      (LINUX32_USRSTACK - 16)
   56 #define LINUX32_MAXDSIZ         (512 * 1024 * 1024)     /* 512MB */
   57 #define LINUX32_MAXSSIZ         (64 * 1024 * 1024)      /* 64MB */
   58 #define LINUX32_MAXVMEM         0                       /* Unlimited */
   59 
   60 #define PTRIN(v)        (void *)(uintptr_t)(v)
   61 #define PTROUT(v)       (l_uintptr_t)(uintptr_t)(v)
   62 
   63 #define CP(src,dst,fld) do { (dst).fld = (src).fld; } while (0)
   64 #define CP2(src,dst,sfld,dfld) do { (dst).dfld = (src).sfld; } while (0)
   65 #define PTRIN_CP(src,dst,fld) \
   66         do { (dst).fld = PTRIN((src).fld); } while (0)
   67 
   68 /*
   69  * Provide a separate set of types for the Linux types.
   70  */
   71 typedef int             l_int;
   72 typedef int32_t         l_long;
   73 typedef int64_t         l_longlong;
   74 typedef short           l_short;
   75 typedef unsigned int    l_uint;
   76 typedef uint32_t        l_ulong;
   77 typedef uint64_t        l_ulonglong;
   78 typedef unsigned short  l_ushort;
   79 
   80 typedef l_ulong         l_uintptr_t;
   81 typedef l_long          l_clock_t;
   82 typedef l_int           l_daddr_t;
   83 typedef l_ushort        l_dev_t;
   84 typedef l_uint          l_gid_t;
   85 typedef l_ushort        l_gid16_t;
   86 typedef l_ulong         l_ino_t;
   87 typedef l_int           l_key_t;
   88 typedef l_longlong      l_loff_t;
   89 typedef l_ushort        l_mode_t;
   90 typedef l_long          l_off_t;
   91 typedef l_int           l_pid_t;
   92 typedef l_uint          l_size_t;
   93 typedef l_long          l_suseconds_t;
   94 typedef l_long          l_time_t;
   95 typedef l_uint          l_uid_t;
   96 typedef l_ushort        l_uid16_t;
   97 typedef l_int           l_timer_t;
   98 typedef l_int           l_mqd_t;
   99 typedef l_ulong         l_fd_mask;
  100 
  101 typedef struct {
  102         l_int           val[2];
  103 } __packed l_fsid_t;
  104 
  105 typedef struct {
  106         l_time_t        tv_sec;
  107         l_suseconds_t   tv_usec;
  108 } l_timeval;
  109 
  110 #define l_fd_set        fd_set
  111 
  112 /*
  113  * Miscellaneous
  114  */
  115 #define LINUX_AT_COUNT          20      /* Count of used aux entry types.
  116                                          * Keep this synchronized with
  117                                          * elf_linux_fixup() code.
  118                                          */
  119 struct l___sysctl_args
  120 {
  121         l_uintptr_t     name;
  122         l_int           nlen;
  123         l_uintptr_t     oldval;
  124         l_uintptr_t     oldlenp;
  125         l_uintptr_t     newval;
  126         l_size_t        newlen;
  127         l_ulong         __spare[4];
  128 } __packed;
  129 
  130 /* Resource limits */
  131 #define LINUX_RLIMIT_CPU        0
  132 #define LINUX_RLIMIT_FSIZE      1
  133 #define LINUX_RLIMIT_DATA       2
  134 #define LINUX_RLIMIT_STACK      3
  135 #define LINUX_RLIMIT_CORE       4
  136 #define LINUX_RLIMIT_RSS        5
  137 #define LINUX_RLIMIT_NPROC      6
  138 #define LINUX_RLIMIT_NOFILE     7
  139 #define LINUX_RLIMIT_MEMLOCK    8
  140 #define LINUX_RLIMIT_AS         9       /* Address space limit */
  141 
  142 #define LINUX_RLIM_NLIMITS      10
  143 
  144 struct l_rlimit {
  145         l_ulong rlim_cur;
  146         l_ulong rlim_max;
  147 } __packed;
  148 
  149 struct l_rusage {
  150         l_timeval ru_utime;
  151         l_timeval ru_stime;
  152         l_long  ru_maxrss;
  153         l_long  ru_ixrss;
  154         l_long  ru_idrss;
  155         l_long  ru_isrss;
  156         l_long  ru_minflt;
  157         l_long  ru_majflt;
  158         l_long  ru_nswap;
  159         l_long  ru_inblock;
  160         l_long  ru_oublock;
  161         l_long  ru_msgsnd;
  162         l_long  ru_msgrcv;
  163         l_long  ru_nsignals;
  164         l_long  ru_nvcsw;
  165         l_long  ru_nivcsw;
  166 } __packed;
  167 
  168 struct l_mmap_argv {
  169         l_uintptr_t     addr;
  170         l_size_t        len;
  171         l_int           prot;
  172         l_int           flags;
  173         l_int           fd;
  174         l_ulong         pgoff;
  175 };
  176 
  177 /*
  178  * stat family of syscalls
  179  */
  180 struct l_timespec {
  181         l_time_t        tv_sec;
  182         l_long          tv_nsec;
  183 } __packed;
  184 
  185 struct l_newstat {
  186         l_ushort        st_dev;
  187         l_ushort        __pad1;
  188         l_ulong         st_ino;
  189         l_ushort        st_mode;
  190         l_ushort        st_nlink;
  191         l_ushort        st_uid;
  192         l_ushort        st_gid;
  193         l_ushort        st_rdev;
  194         l_ushort        __pad2;
  195         l_ulong         st_size;
  196         l_ulong         st_blksize;
  197         l_ulong         st_blocks;
  198         struct l_timespec       st_atim;
  199         struct l_timespec       st_mtim;
  200         struct l_timespec       st_ctim;
  201         l_ulong         __unused4;
  202         l_ulong         __unused5;
  203 } __packed;
  204 
  205 struct l_stat {
  206         l_ushort        st_dev;
  207         l_ulong         st_ino;
  208         l_ushort        st_mode;
  209         l_ushort        st_nlink;
  210         l_ushort        st_uid;
  211         l_ushort        st_gid;
  212         l_ushort        st_rdev;
  213         l_long          st_size;
  214         struct l_timespec       st_atim;
  215         struct l_timespec       st_mtim;
  216         struct l_timespec       st_ctim;
  217         l_long          st_blksize;
  218         l_long          st_blocks;
  219         l_ulong         st_flags;
  220         l_ulong         st_gen;
  221 };
  222 
  223 struct l_stat64 {
  224         l_ushort        st_dev;
  225         u_char          __pad0[10];
  226         l_ulong         __st_ino;
  227         l_uint          st_mode;
  228         l_uint          st_nlink;
  229         l_ulong         st_uid;
  230         l_ulong         st_gid;
  231         l_ushort        st_rdev;
  232         u_char          __pad3[10];
  233         l_longlong      st_size;
  234         l_ulong         st_blksize;
  235         l_ulong         st_blocks;
  236         l_ulong         __pad4;
  237         struct l_timespec       st_atim;
  238         struct l_timespec       st_mtim;
  239         struct l_timespec       st_ctim;
  240         l_ulonglong     st_ino;
  241 } __packed;
  242 
  243 struct l_statfs64 { 
  244         l_int           f_type; 
  245         l_int           f_bsize; 
  246         uint64_t        f_blocks; 
  247         uint64_t        f_bfree; 
  248         uint64_t        f_bavail; 
  249         uint64_t        f_files; 
  250         uint64_t        f_ffree; 
  251         l_fsid_t        f_fsid;
  252         l_int           f_namelen;
  253         l_int           f_frsize;
  254         l_int           f_flags;
  255         l_int           f_spare[4];
  256 } __packed;
  257 
  258 /* sigaction flags */
  259 #define LINUX_SA_NOCLDSTOP      0x00000001
  260 #define LINUX_SA_NOCLDWAIT      0x00000002
  261 #define LINUX_SA_SIGINFO        0x00000004
  262 #define LINUX_SA_RESTORER       0x04000000
  263 #define LINUX_SA_ONSTACK        0x08000000
  264 #define LINUX_SA_RESTART        0x10000000
  265 #define LINUX_SA_INTERRUPT      0x20000000
  266 #define LINUX_SA_NOMASK         0x40000000
  267 #define LINUX_SA_ONESHOT        0x80000000
  268 
  269 /* sigprocmask actions */
  270 #define LINUX_SIG_BLOCK         0
  271 #define LINUX_SIG_UNBLOCK       1
  272 #define LINUX_SIG_SETMASK       2
  273 
  274 /* sigaltstack */
  275 #define LINUX_MINSIGSTKSZ       2048
  276 
  277 typedef l_uintptr_t l_handler_t;
  278 typedef l_ulong l_osigset_t;
  279 
  280 typedef struct {
  281         l_handler_t     lsa_handler;
  282         l_osigset_t     lsa_mask;
  283         l_ulong         lsa_flags;
  284         l_uintptr_t     lsa_restorer;
  285 } __packed l_osigaction_t;
  286 
  287 typedef struct {
  288         l_handler_t     lsa_handler;
  289         l_ulong         lsa_flags;
  290         l_uintptr_t     lsa_restorer;
  291         l_sigset_t      lsa_mask;
  292 } __packed l_sigaction_t;
  293 
  294 typedef struct {
  295         l_uintptr_t     ss_sp;
  296         l_int           ss_flags;
  297         l_size_t        ss_size;
  298 } __packed l_stack_t;
  299 
  300 /* The Linux sigcontext, pretty much a standard 386 trapframe. */
  301 struct l_sigcontext {
  302         l_uint          sc_gs;
  303         l_uint          sc_fs;
  304         l_uint          sc_es;
  305         l_uint          sc_ds;
  306         l_uint          sc_edi;
  307         l_uint          sc_esi;
  308         l_uint          sc_ebp;
  309         l_uint          sc_esp;
  310         l_uint          sc_ebx;
  311         l_uint          sc_edx;
  312         l_uint          sc_ecx;
  313         l_uint          sc_eax;
  314         l_uint          sc_trapno;
  315         l_uint          sc_err;
  316         l_uint          sc_eip;
  317         l_uint          sc_cs;
  318         l_uint          sc_eflags;
  319         l_uint          sc_esp_at_signal;
  320         l_uint          sc_ss;
  321         l_uint          sc_387;
  322         l_uint          sc_mask;
  323         l_uint          sc_cr2;
  324 } __packed;
  325 
  326 struct l_ucontext {
  327         l_ulong         uc_flags;
  328         l_uintptr_t     uc_link;
  329         l_stack_t       uc_stack;
  330         struct l_sigcontext     uc_mcontext;
  331         l_sigset_t      uc_sigmask;
  332 } __packed;
  333 
  334 #define LINUX_SI_MAX_SIZE       128
  335 #define LINUX_SI_PAD_SIZE       ((LINUX_SI_MAX_SIZE/sizeof(l_int)) - 3)
  336 
  337 typedef union l_sigval {
  338         l_int           sival_int;
  339         l_uintptr_t     sival_ptr;
  340 } l_sigval_t;
  341 
  342 typedef struct l_siginfo {
  343         l_int           lsi_signo;
  344         l_int           lsi_errno;
  345         l_int           lsi_code;
  346         union {
  347                 l_int   _pad[LINUX_SI_PAD_SIZE];
  348 
  349                 struct {
  350                         l_pid_t         _pid;
  351                         l_uid_t         _uid;
  352                 } __packed _kill;
  353 
  354                 struct {
  355                         l_timer_t       _tid;
  356                         l_int           _overrun;
  357                         char            _pad[sizeof(l_uid_t) - sizeof(l_int)];
  358                         l_sigval_t      _sigval;
  359                         l_int           _sys_private;
  360                 } __packed _timer;
  361 
  362                 struct {
  363                         l_pid_t         _pid;           /* sender's pid */
  364                         l_uid_t         _uid;           /* sender's uid */
  365                         l_sigval_t      _sigval;
  366                 } __packed _rt;
  367 
  368                 struct {
  369                         l_pid_t         _pid;           /* which child */
  370                         l_uid_t         _uid;           /* sender's uid */
  371                         l_int           _status;        /* exit code */
  372                         l_clock_t       _utime;
  373                         l_clock_t       _stime;
  374                 } __packed _sigchld;
  375 
  376                 struct {
  377                         l_uintptr_t     _addr;  /* Faulting insn/memory ref. */
  378                 } __packed _sigfault;
  379 
  380                 struct {
  381                         l_long          _band;  /* POLL_IN,POLL_OUT,POLL_MSG */
  382                         l_int           _fd;
  383                 } __packed _sigpoll;
  384         } _sifields;
  385 } __packed l_siginfo_t;
  386 
  387 #define lsi_pid         _sifields._kill._pid
  388 #define lsi_uid         _sifields._kill._uid
  389 #define lsi_tid         _sifields._timer._tid
  390 #define lsi_overrun     _sifields._timer._overrun
  391 #define lsi_sys_private _sifields._timer._sys_private
  392 #define lsi_status      _sifields._sigchld._status
  393 #define lsi_utime       _sifields._sigchld._utime
  394 #define lsi_stime       _sifields._sigchld._stime
  395 #define lsi_value       _sifields._rt._sigval
  396 #define lsi_int         _sifields._rt._sigval.sival_int
  397 #define lsi_ptr         _sifields._rt._sigval.sival_ptr
  398 #define lsi_addr        _sifields._sigfault._addr
  399 #define lsi_band        _sifields._sigpoll._band
  400 #define lsi_fd          _sifields._sigpoll._fd
  401 
  402 struct l_fpreg {
  403         u_int16_t       significand[4];
  404         u_int16_t       exponent;
  405 } __packed;
  406 
  407 struct l_fpxreg {
  408         u_int16_t       significand[4];
  409         u_int16_t       exponent;
  410         u_int16_t       padding[3];
  411 } __packed;
  412 
  413 struct l_xmmreg {
  414         u_int32_t       element[4];
  415 } __packed;
  416 
  417 struct l_fpstate {
  418         /* Regular FPU environment */
  419         u_int32_t               cw;
  420         u_int32_t               sw;
  421         u_int32_t               tag;
  422         u_int32_t               ipoff;
  423         u_int32_t               cssel;
  424         u_int32_t               dataoff;
  425         u_int32_t               datasel;
  426         struct l_fpreg          _st[8];
  427         u_int16_t               status;
  428         u_int16_t               magic;          /* 0xffff = regular FPU data */
  429 
  430         /* FXSR FPU environment */
  431         u_int32_t               _fxsr_env[6];   /* env is ignored. */
  432         u_int32_t               mxcsr;
  433         u_int32_t               reserved;
  434         struct l_fpxreg         _fxsr_st[8];    /* reg data is ignored. */
  435         struct l_xmmreg         _xmm[8];
  436         u_int32_t               padding[56];
  437 } __packed;
  438 
  439 /*
  440  * We make the stack look like Linux expects it when calling a signal
  441  * handler, but use the BSD way of calling the handler and sigreturn().
  442  * This means that we need to pass the pointer to the handler too.
  443  * It is appended to the frame to not interfere with the rest of it.
  444  */
  445 struct l_sigframe {
  446         l_int                   sf_sig;
  447         struct l_sigcontext     sf_sc;
  448         struct l_fpstate        sf_fpstate;
  449         l_uint                  sf_extramask[1];
  450         l_handler_t             sf_handler;
  451 } __packed;
  452 
  453 struct l_rt_sigframe {
  454         l_int                   sf_sig;
  455         l_uintptr_t             sf_siginfo;
  456         l_uintptr_t             sf_ucontext;
  457         l_siginfo_t             sf_si;
  458         struct l_ucontext       sf_sc;
  459         l_handler_t             sf_handler;
  460 } __packed;
  461 
  462 /*
  463  * arch specific open/fcntl flags
  464  */
  465 #define LINUX_F_GETLK64         12
  466 #define LINUX_F_SETLK64         13
  467 #define LINUX_F_SETLKW64        14
  468 
  469 union l_semun {
  470         l_int           val;
  471         l_uintptr_t     buf;
  472         l_uintptr_t     array;
  473         l_uintptr_t     __buf;
  474         l_uintptr_t     __pad;
  475 } __packed;
  476 
  477 struct l_sockaddr {
  478         l_ushort        sa_family;
  479         char            sa_data[14];
  480 } __packed;
  481 
  482 struct l_ifmap {
  483         l_ulong         mem_start;
  484         l_ulong         mem_end;
  485         l_ushort        base_addr;
  486         u_char          irq;
  487         u_char          dma;
  488         u_char          port;
  489 } __packed;
  490 
  491 #define LINUX_IFHWADDRLEN       6
  492 #define LINUX_IFNAMSIZ          16
  493 
  494 struct l_ifreq {
  495         union {
  496                 char    ifrn_name[LINUX_IFNAMSIZ];
  497         } ifr_ifrn;
  498 
  499         union {
  500                 struct l_sockaddr       ifru_addr;
  501                 struct l_sockaddr       ifru_dstaddr;
  502                 struct l_sockaddr       ifru_broadaddr;
  503                 struct l_sockaddr       ifru_netmask;
  504                 struct l_sockaddr       ifru_hwaddr;
  505                 l_short         ifru_flags[1];
  506                 l_int           ifru_ivalue;
  507                 l_int           ifru_mtu;
  508                 struct l_ifmap  ifru_map;
  509                 char            ifru_slave[LINUX_IFNAMSIZ];
  510                 l_uintptr_t     ifru_data;
  511         } ifr_ifru;
  512 } __packed;
  513 
  514 #define ifr_name        ifr_ifrn.ifrn_name      /* Interface name */
  515 #define ifr_hwaddr      ifr_ifru.ifru_hwaddr    /* MAC address */
  516 #define ifr_ifindex     ifr_ifru.ifru_ivalue    /* Interface index */
  517 
  518 struct l_ifconf {
  519         int     ifc_len;
  520         union {
  521                 l_uintptr_t     ifcu_buf;
  522                 l_uintptr_t     ifcu_req;
  523         } ifc_ifcu;
  524 } __packed;
  525 
  526 #define ifc_buf         ifc_ifcu.ifcu_buf
  527 #define ifc_req         ifc_ifcu.ifcu_req
  528 
  529 /*
  530  * poll()
  531  */
  532 #define LINUX_POLLIN            0x0001
  533 #define LINUX_POLLPRI           0x0002
  534 #define LINUX_POLLOUT           0x0004
  535 #define LINUX_POLLERR           0x0008
  536 #define LINUX_POLLHUP           0x0010
  537 #define LINUX_POLLNVAL          0x0020
  538 #define LINUX_POLLRDNORM        0x0040
  539 #define LINUX_POLLRDBAND        0x0080
  540 #define LINUX_POLLWRNORM        0x0100
  541 #define LINUX_POLLWRBAND        0x0200
  542 #define LINUX_POLLMSG           0x0400
  543 
  544 struct l_pollfd {
  545         l_int           fd;
  546         l_short         events;
  547         l_short         revents;
  548 } __packed;
  549 
  550 struct l_user_desc {
  551         l_uint          entry_number;
  552         l_uint          base_addr;
  553         l_uint          limit;
  554         l_uint          seg_32bit:1;
  555         l_uint          contents:2;
  556         l_uint          read_exec_only:1;
  557         l_uint          limit_in_pages:1;
  558         l_uint          seg_not_present:1;
  559         l_uint          useable:1;
  560 };
  561 
  562 #define LINUX_LOWERWORD 0x0000ffff
  563 
  564 /*
  565  * Macros which does the same thing as those in Linux include/asm-um/ldt-i386.h.
  566  * These convert Linux user space descriptor to machine one.
  567  */
  568 #define LINUX_LDT_entry_a(info)                                 \
  569         ((((info)->base_addr & LINUX_LOWERWORD) << 16) |        \
  570         ((info)->limit & LINUX_LOWERWORD))
  571 
  572 #define LINUX_ENTRY_B_READ_EXEC_ONLY    9
  573 #define LINUX_ENTRY_B_CONTENTS          10
  574 #define LINUX_ENTRY_B_SEG_NOT_PRESENT   15
  575 #define LINUX_ENTRY_B_BASE_ADDR         16
  576 #define LINUX_ENTRY_B_USEABLE           20
  577 #define LINUX_ENTRY_B_SEG32BIT          22
  578 #define LINUX_ENTRY_B_LIMIT             23
  579 
  580 #define LINUX_LDT_entry_b(info)                                                 \
  581         (((info)->base_addr & 0xff000000) |                                     \
  582         ((info)->limit & 0xf0000) |                                             \
  583         ((info)->contents << LINUX_ENTRY_B_CONTENTS) |                          \
  584         (((info)->seg_not_present == 0) << LINUX_ENTRY_B_SEG_NOT_PRESENT) |     \
  585         (((info)->base_addr & 0x00ff0000) >> LINUX_ENTRY_B_BASE_ADDR) |         \
  586         (((info)->read_exec_only == 0) << LINUX_ENTRY_B_READ_EXEC_ONLY) |       \
  587         ((info)->seg_32bit << LINUX_ENTRY_B_SEG32BIT) |                         \
  588         ((info)->useable << LINUX_ENTRY_B_USEABLE) |                            \
  589         ((info)->limit_in_pages << LINUX_ENTRY_B_LIMIT) | 0x7000)
  590 
  591 #define LINUX_LDT_empty(info)           \
  592         ((info)->base_addr == 0 &&      \
  593         (info)->limit == 0 &&           \
  594         (info)->contents == 0 &&        \
  595         (info)->seg_not_present == 1 && \
  596         (info)->read_exec_only == 1 &&  \
  597         (info)->seg_32bit == 0 &&       \
  598         (info)->limit_in_pages == 0 &&  \
  599         (info)->useable == 0)
  600 
  601 /*
  602  * Macros for converting segments.
  603  * They do the same as those in arch/i386/kernel/process.c in Linux.
  604  */
  605 #define LINUX_GET_BASE(desc)                            \
  606         ((((desc)->a >> 16) & LINUX_LOWERWORD) |        \
  607         (((desc)->b << 16) & 0x00ff0000) |              \
  608         ((desc)->b & 0xff000000))
  609 
  610 #define LINUX_GET_LIMIT(desc)                   \
  611         (((desc)->a & LINUX_LOWERWORD) |        \
  612         ((desc)->b & 0xf0000))
  613 
  614 #define LINUX_GET_32BIT(desc)           \
  615         (((desc)->b >> LINUX_ENTRY_B_SEG32BIT) & 1)
  616 #define LINUX_GET_CONTENTS(desc)        \
  617         (((desc)->b >> LINUX_ENTRY_B_CONTENTS) & 3)
  618 #define LINUX_GET_WRITABLE(desc)        \
  619         (((desc)->b >> LINUX_ENTRY_B_READ_EXEC_ONLY) & 1)
  620 #define LINUX_GET_LIMIT_PAGES(desc)     \
  621         (((desc)->b >> LINUX_ENTRY_B_LIMIT) & 1)
  622 #define LINUX_GET_PRESENT(desc)         \
  623         (((desc)->b >> LINUX_ENTRY_B_SEG_NOT_PRESENT) & 1)
  624 #define LINUX_GET_USEABLE(desc)         \
  625         (((desc)->b >> LINUX_ENTRY_B_USEABLE) & 1)
  626 
  627 struct iovec;
  628 struct uio;
  629 
  630 struct l_iovec32 {
  631         uint32_t        iov_base;
  632         l_size_t        iov_len;
  633 };
  634 
  635 int linux32_copyiniov(struct l_iovec32 *iovp32, l_ulong iovcnt,
  636                             struct iovec **iovp, int error);
  637 int linux32_copyinuio(struct l_iovec32 *iovp, l_ulong iovcnt,
  638                             struct uio **uiop);
  639 int linux_copyout_rusage(struct rusage *ru, void *uaddr);
  640 
  641 /* robust futexes */
  642 struct linux_robust_list {
  643         l_uintptr_t                     next;
  644 };
  645 
  646 struct linux_robust_list_head {
  647         struct linux_robust_list        list;
  648         l_long                          futex_offset;
  649         l_uintptr_t                     pending_list;
  650 };
  651 
  652 #endif /* !_AMD64_LINUX_H_ */

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