root / Whitix / branches / hybrid / include / elf.h

/*  This file is part of Whitix.
 *
 *  Whitix is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Whitix is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Whitix; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef ELF_H
#define ELF_H

#include <typedefs.h>

#define PUSH_AUX_ENT(stackP,id,value) \
        do { \
        STACK_PUSH((stackP),(value)); \
        STACK_PUSH((stackP),(id)); \
        }while(0)

#define AT_NULL         0
#define AT_IGNORE       1
#define AT_EXECFD       2
#define AT_PHDR         3
#define AT_PHENT        4
#define AT_PHNUM        5
#define AT_PAGESZ       6
#define AT_BASE         7
#define AT_FLAGS        8
#define AT_ENTRY        9
#define AT_NOTELF       10
#define AT_UID          11
#define AT_EUID         12
#define AT_GID          13
#define AT_EGID         14

#define ELF_HEAD_CHECK(header) ((header)->elfMagic[0] == 0x7F && (header)->elfMagic[1] == 'E' && (header)->elfMagic[2] == 'L' \
                && (header)->elfMagic[3] == 'F')

/* ELF file types */
#define ELF_REL         1
#define ELF_EXEC        2
#define ELF_DYN         3

/* ELF segment types */
#define ELF_TYPE_LOAD   1
#define ELF_TYPE_DYN    2
#define ELF_TYPE_INTERP 3

/* ELF permissions */
#define ELF_PERMS_RW    2

/* ElfCheckHeader - sanity checks the ELF header */
#define ElfCheckHeader(header, type) \
        (!ELF_HEAD_CHECK(header) || !((header)->fileType & (type)) || header->phEntrySize != sizeof(struct ElfSegmentHeader))

struct ElfHeader
{
        char elfMagic[4];
        BYTE bitness,endian,elfVer,reserved;
        DWORD reserved2[2];
        WORD fileType,machine;
        DWORD elfVer2;
        DWORD entryPoint;
        DWORD phOffset;
        DWORD shOffset;
        DWORD flags;
        WORD thisSize,phEntrySize;
        WORD phEntries,shEntrySize;
        WORD shEntries,strTabSectionIndex;
}PACKED;

struct ElfSegmentHeader
{
        DWORD type;
        DWORD fileOffset;
        DWORD virtualAddr;
        DWORD physAddr;
        DWORD fileSize;
        DWORD memSize;
        DWORD segFlags;
        DWORD segAlign;
}PACKED;

/* Section types. */
#define SEC_TYPE_SYMTAB         2
#define SEC_TYPE_STRTAB         3
#define SEC_TYPE_NOBITS         8
#define SEC_TYPE_REL            9

/* Section flags. */
#define SEC_FLAGS_ALLOC         2
#define SEC_FLAGS_EXEC          4

struct ElfSectionHeader
{
        DWORD shName;
        DWORD shType;
        DWORD shFlags;
        DWORD shAddr;
        DWORD shOffset;
        DWORD shSize;
        DWORD shLink;
        DWORD shInfo;
        DWORD shAddrAlign;
        DWORD shEntSize;
}PACKED;

#define STN_UNDEF       0
#define STN_ABS         0xFFF1
#define STN_COMMON      0xFFF2

#define ELF_ST_TYPE(val) ((val) & 0xF)

#define STT_FUNC        2

struct ElfSymbol
{
        DWORD symName;
        DWORD symValue;
        DWORD symSize;
        BYTE symInfo;
        BYTE symOther;
        WORD symIndex;
}PACKED;

#define ELF_R_SYM(sym) ((sym) >> 8)
#define ELF_R_TYPE(sym) ((sym) & 0xFF)

/* Relocation types. */
#define R_386_NONE      0
#define R_386_32        1
#define R_386_PC32      2
#define R_386_GOT32     3
#define R_386_PLT32     4
#define R_386_COPY      5
#define R_386_GLOB_DAT  6
#define R_386_JMP_SLOT  7
#define R_386_RELATIVE  8
#define R_386_GOTOFF    9
#define R_386_GOTPC     10
#define R_386_NUM       11

struct ElfReloc
{
        DWORD addr;
        DWORD info;
}PACKED;

#endif