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Annotation of src/include/link_elf.h, Revision 1.2

1.2     ! pvalchev    1: /*     $OpenBSD: link_elf.h,v 1.1 2002/06/07 03:00:01 art Exp $        */
1.1       art         2:
                      3: /*
1.2     ! pvalchev    4:  * Copyright (c) 1996 Per Fogelstrom
        !             5:  *
        !             6:  * Redistribution and use in source and binary forms, with or without
        !             7:  * modification, are permitted provided that the following conditions
        !             8:  * are met:
        !             9:  * 1. Redistributions of source code must retain the above copyright
        !            10:  *    notice, this list of conditions and the following disclaimer.
        !            11:  * 2. Redistributions in binary form must reproduce the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer in the
        !            13:  *    documentation and/or other materials provided with the distribution.
        !            14:  * 3. All advertising materials mentioning features or use of this software
        !            15:  *    must display the following acknowledgement:
        !            16:  *     This product includes software developed under OpenBSD by
        !            17:  *     Per Fogelstrom.
        !            18:  * 4. 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
        !            22:  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
        !            23:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
        !            25:  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
1.1       art        33:  */
                     34:
1.2     ! pvalchev   35: #ifndef _LINK_ELF_H
        !            36:
1.1       art        37: #include <elf_abi.h>
                     38:
                     39: #ifndef DT_PROCNUM
                     40: #define DT_PROCNUM 0
                     41: #endif
                     42:
1.2     ! pvalchev   43: /* Structure describing a loaded shared object.  The `l_next' and `l_prev'
        !            44:    members form a chain of all the shared objects loaded at startup.
        !            45:
        !            46:    These data structures exist in space used by the run-time dynamic linker;
        !            47:    modifying them may have disastrous results.  */
        !            48:
        !            49: struct link_map
        !            50:   {
        !            51:     /* These first few members are part of the protocol with the debugger.
        !            52:        This is the same format used in SVR4.  */
        !            53:
        !            54:     Elf_Addr l_addr;           /* Base address shared object is loaded at.  */
        !            55:     Elf_Addr l_offs;           /* Offset */
        !            56:     char *l_name;              /* Absolute file name object was found in.  */
        !            57:     Elf_Dyn *l_ld;             /* Dynamic section of the shared object.  */
        !            58:     struct link_map *l_next, *l_prev; /* Chain of loaded objects.  */
        !            59:
        !            60:     /* All following members are internal to the dynamic linker.
        !            61:        They may change without notice.  */
        !            62:
        !            63:     const char *l_libname;     /* Name requested (before search).  */
        !            64:
        !            65:     /* Indexed pointers to dynamic section.  */
        !            66:     Elf_Dyn *l_info[DT_NUM + DT_PROCNUM];
        !            67:
        !            68:     const Elf_Phdr *l_phdr;    /* Pointer to program header table in core.  */
        !            69:     Elf_Word l_phnum;          /* Number of program header entries.  */
        !            70:     Elf_Addr l_entry;          /* Entry point location.  */
        !            71:
        !            72:     /* Symbol hash table.  */
        !            73:     Elf_Word l_nbuckets;
        !            74:     const Elf_Word *l_buckets, *l_chain;
        !            75:
        !            76:     unsigned int l_opencount;  /* Reference count for dlopen/dlclose.  */
        !            77:     enum                       /* Where this object came from.  */
        !            78:       {
        !            79:        lt_executable,          /* The main executable program.  */
        !            80:        lt_interpreter,         /* The interpreter: the dynamic linker.  */
        !            81:        lt_library,             /* Library needed by main executable.  */
        !            82:        lt_loaded,              /* Extra run-time loaded shared object.  */
        !            83:       } l_type:2;
        !            84:     unsigned int l_deps_loaded:1; /* Nonzero if DT_NEEDED items loaded.  */
        !            85:     unsigned int l_relocated:1;        /* Nonzero if object's relocations done.  */
        !            86:     unsigned int l_init_called:1; /* Nonzero if DT_INIT function called.  */
        !            87:     unsigned int l_init_running:1; /* Nonzero while DT_INIT function runs.  */
        !            88:   };
1.1       art        89:
1.2     ! pvalchev   90: #endif /* !_LINK_ELF_H */