usr/src/lib/libc/inc/libc_int.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _LIBC_INT_H
  28 #define _LIBC_INT_H
  29
  30 #ifdef  __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 /*
  35  * Libc/rtld Runtime Interface
  36  */
  37 #define CI_NULL         0               /* (void) last entry */
  38 #define CI_VERSION      1               /* current version of ri_interface */
  39 #define CI_ATEXIT       2               /* _preexec_exit_handlers() address */
  40 #define CI_LCMESSAGES   3               /* message locale */
  41 #define CI_BIND_GUARD   4               /* bind_guard() address */
  42 #define CI_BIND_CLEAR   5               /* bind_clear() address */
  43 #define CI_THR_SELF     6               /* thr_self() address */
  44 #define CI_TLS_MODADD   7               /* __tls_mod_add() address */
  45 #define CI_TLS_MODREM   8               /* __tls_mod_remove() address */
  46 #define CI_TLS_STATMOD  9               /* __tls_static_mods() address */
  47 #define CI_THRINIT      10              /* libc thread initialization */
  48 #define CI_CRITICAL     11              /* critical level query interface */
  49
  50 #define CI_MAX          12
  51
  52 #define CI_V_NONE       0               /* ci_version versions */
  53 #define CI_V_ONE        1               /* original version */
  54 #define CI_V_TWO        2
  55 #define CI_V_THREE      3
  56 #define CI_V_FOUR       4
  57 #define CI_V_FIVE       5
  58 #define CI_V_SIX        6
  59 #define CI_V_CURRENT    CI_V_SIX        /* current version of libc interface */
  60 #define CI_V_NUM        7               /* number of CI_V_* numbers */
  61
  62 /*
  63  * Flags for the bindguard routines.
  64  * THR_FLG_RTLD used to live in usr/src/cmd/sgs/rtld/common/_rtld.h
  65  * THR_FLG_NOLOCK and THR_FLG_REENTER are new in version CI_V_FIVE.
  66  */
  67 #define THR_FLG_RTLD    0x00000001      /* bind_guard() flag */
  68 #define THR_FLG_NOLOCK  0x00000002      /* don't use ld.so.1's lock */
  69 #define THR_FLG_REENTER 0x00000004      /* temporary leave / reenter */
  70
  71 /*
  72  * Libc to ld.so.1 interface communication structure.
  73  */
  74 typedef struct {
  75         int     ci_tag;
  76         union {
  77                 int     (*ci_func)();
  78                 long    ci_val;
  79                 char    *ci_ptr;
  80         } ci_un;
  81 } Lc_interface;
  82
  83 /*
  84  * Address range returned via CI_ATEXIT.  Note, the address range array passed
  85  * back from ld.so.1 is maintained by ld.so.1 and should not be freed by libc.
  86  */
  87 typedef struct {
  88         void *  lb;                     /* lower bound */
  89         void *  ub;                     /* upper bound */
  90 } Lc_addr_range_t;
  91
  92 /*
  93  * Thread-Local storage data type and interfaces shared between
  94  * libc & ld.so.1.
  95  */
  96
  97 typedef struct {
  98         unsigned long   ti_moduleid;    /* module ID for TLS var */
  99         unsigned long   ti_tlsoffset;   /* offset into tls block for TLS var */
 100 } TLS_index;
 101
 102
 103 typedef struct {
 104         const char      *tm_modname;            /* name of object */
 105                                                 /*      containing TLS */
 106         unsigned long   tm_modid;               /* TLS module id */
 107         void *          tm_tlsblock;            /* pointer to r/o init image */
 108         unsigned long   tm_filesz;              /* initialized file size */
 109         unsigned long   tm_memsz;               /* memory size */
 110         long            tm_stattlsoffset;       /* signed offset into static */
 111                                                 /*      TLS block */
 112         unsigned long   tm_flags;
 113         void *          tm_tlsinitarray;        /* TLS .init function array */
 114         unsigned long   tm_tlsinitarraycnt;     /* # of entries in initarray */
 115         void *          tm_tlsfiniarray;        /* TLS .fini function array */
 116         unsigned long   tm_tlsfiniarraycnt;     /* # of entries in finiarray */
 117         unsigned long   tm_pad[5];              /* future expansion */
 118 } TLS_modinfo;
 119
 120 #ifdef _SYSCALL32
 121 typedef struct {
 122         caddr32_t       tm_modname;             /* name of object */
 123                                                 /*      containing TLS */
 124         uint32_t        tm_modid;               /* TLS module id */
 125         caddr32_t       tm_tlsblock;            /* pointer to r/o init image */
 126         uint32_t        tm_filesz;              /* initialized file size */
 127         uint32_t        tm_memsz;               /* memory size */
 128         int32_t         tm_stattlsoffset;       /* signed offset into static */
 129                                                 /*      TLS block */
 130         uint32_t        tm_flags;
 131         caddr32_t       tm_tlsinitarray;        /* TLS .init function array */
 132         uint32_t        tm_tlsinitarraycnt;     /* # of entries in initarray */
 133         caddr32_t       tm_tlsfiniarray;        /* TLS .fini function array */
 134         uint32_t        tm_tlsfiniarraycnt;     /* # of entries in finiarray */
 135         uint32_t        tm_pad[5];              /* future expansion */
 136 } TLS_modinfo32;
 137 #endif
 138
 139
 140 /*
 141  * Flag values for TLS_modifo.tm_flags
 142  */
 143 #define TM_FLG_STATICTLS        0x0001          /* Static TLS module */
 144
 145
 146 #ifdef  __cplusplus
 147 }
 148 #endif
 149
 150 #endif /* _LIBC_INT_H */