sys/sys/link_elf.h

   1 /*-
   2  * Copyright (c) 1993 Paul Kranenburg
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Paul Kranenburg.
  16  * 4. 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: src/sys/sys/link_elf.h,v 1.32 2011/01/08 17:11:49 kib Exp $
  31  */
  32
  33 /*
  34  * RRS section definitions.
  35  *
  36  * The layout of some data structures defined in this header file is
  37  * such that we can provide compatibility with the SunOS 4.x shared
  38  * library scheme.
  39  */
  40
  41 #ifndef _SYS_LINK_ELF_H_
  42 #define _SYS_LINK_ELF_H_
  43
  44 #include <elf.h>
  45
  46 /*
  47  * Flags that describe the origin of the entries in Dl_serinfo.
  48  * SunOS has these in <sys/link.h>, we follow the suit.
  49  */
  50 #define LA_SER_ORIG     0x01    /* original (needed) name */
  51 #define LA_SER_LIBPATH  0x02    /* LD_LIBRARY_PATH entry prepended */
  52 #define LA_SER_RUNPATH  0x04    /* runpath entry prepended */
  53 #define LA_SER_CONFIG   0x08    /* configuration entry prepended */
  54 #define LA_SER_DEFAULT  0x40    /* default path prepended */
  55 #define LA_SER_SECURE   0x80    /* default (secure) path prepended */
  56
  57 typedef struct link_map {
  58         caddr_t         l_addr;                 /* Base Address of library */
  59         const char      *l_name;                /* Absolute Path to Library */
  60         const void      *l_ld;                  /* Pointer to .dynamic in memory */
  61         struct link_map *l_next, *l_prev;       /* linked list of of mapped libs */
  62 } Link_map;
  63
  64 struct r_debug {
  65         int             r_version;              /* not used */
  66         struct link_map *r_map;                 /* list of loaded images */
  67         void            (*r_brk)(struct r_debug *, struct link_map *);
  68                                                 /* pointer to break point */
  69         enum {
  70             RT_CONSISTENT,                      /* things are stable */
  71             RT_ADD,                             /* adding a shared library */
  72             RT_DELETE                           /* removing a shared library */
  73         }               r_state;
  74 };
  75
  76 struct dl_phdr_info
  77 {
  78    Elf_Addr               dlpi_addr;     /* module relocation base */
  79    const char            *dlpi_name;     /* module name */
  80    const Elf_Phdr        *dlpi_phdr;     /* pointer to module's phdr */
  81    Elf_Half               dlpi_phnum;    /* number of entries in phdr */
  82    unsigned long long int dlpi_adds;     /* total # of loads */
  83    unsigned long long int dlpi_subs;     /* total # of unloads */
  84    size_t                 dlpi_tls_modid;
  85    void                  *dlpi_tls_data;
  86 };
  87
  88 __BEGIN_DECLS
  89
  90 typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t, void *);
  91 extern int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
  92 int _rtld_addr_phdr(const void *, struct dl_phdr_info *);
  93 int _rtld_get_stack_prot(void);
  94
  95 __END_DECLS
  96
  97 #endif /* _SYS_LINK_ELF_H_ */