source: mainline/uspace/lib/c/include/rtld/elf_dyn.h@ c3fa24e

/*
 * Copyright (c) 2008 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libc
 * @{
 */
/** @file
 */

#ifndef LIBC_RTLD_ELF_DYN_H_
#define LIBC_RTLD_ELF_DYN_H_

#include <elf/elf.h>
#include <libarch/rtld/elf_dyn.h>

#define ELF32_R_SYM(i) ((i) >> 8)
#define ELF32_R_TYPE(i) ((unsigned char)(i))

#define ELF64_R_SYM(i) ((i) >> 32)
#define ELF64_R_TYPE(i) ((i) & 0xffffffffL)

struct elf32_dyn {
        elf_sword d_tag;
        union {
                elf_word d_val;
                elf32_addr d_ptr;
        } d_un;
};

struct elf64_dyn {
        elf_sxword d_tag;
        union {
                elf_xword d_val;
                elf64_addr d_ptr;
        } d_un;
};

struct elf32_rel {
        elf32_addr r_offset;
        elf_word r_info;
};

struct elf32_rela {
        elf32_addr r_offset;
        elf_word r_info;
        elf_sword r_addend;
};

struct elf64_rel {
        elf64_addr r_offset;
        elf_xword r_info;
};

struct elf64_rela {
        elf64_addr r_offset;
        elf_xword r_info;
        elf_sxword r_addend;
};

#ifdef __32_BITS__
typedef struct elf32_dyn elf_dyn_t;
typedef struct elf32_rel elf_rel_t;
typedef struct elf32_rela elf_rela_t;
#endif

#ifdef __64_BITS__
typedef struct elf64_dyn elf_dyn_t;
typedef struct elf64_rel elf_rel_t;
typedef struct elf64_rela elf_rela_t;
#endif

/*
 * Dynamic array tags
 */
#define DT_NULL         0
#define DT_NEEDED       1
#define DT_PLTRELSZ     2
#define DT_PLTGOT       3
#define DT_HASH         4
#define DT_STRTAB       5
#define DT_SYMTAB       6
#define DT_RELA         7
#define DT_RELASZ       8
#define DT_RELAENT      9
#define DT_STRSZ        10
#define DT_SYMENT       11
#define DT_INIT         12
#define DT_FINI         13
#define DT_SONAME       14
#define DT_RPATH        15
#define DT_SYMBOLIC     16
#define DT_REL          17
#define DT_RELSZ        18
#define DT_RELENT       19
#define DT_PLTREL       20
#define DT_DEBUG        21
#define DT_TEXTREL      22
#define DT_JMPREL       23
#define DT_BIND_NOW     24
#define DT_LOPROC       0x70000000
#define DT_HIPROC       0x7fffffff

/*
 * Special section indexes
 */
#define SHN_UNDEF       0
#define SHN_LORESERVE   0xff00
#define SHN_LOPROC      0xff00
#define SHN_HIPROC      0xff1f
#define SHN_ABS         0xfff1
#define SHN_COMMON      0xfff2
#define SHN_HIRESERVE   0xffff

/*
 * Special symbol table index
 */
#define STN_UNDEF       0

#endif

/** @}
 */