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Annotation of src/include/link_elf.h, Revision 1.3

1.3     ! deraadt     1: /*     $OpenBSD: link_elf.h,v 1.2 2002/08/06 07:40:31 pvalchev 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.  */
1.3     ! deraadt    82:        lt_loaded               /* Extra run-time loaded shared object.  */
1.2       pvalchev   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 */