Markus F.X.J. Oberhumer
162 lines
5.9 KiB
C
162 lines
5.9 KiB
C
/* p_elf.h --
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This file is part of the UPX executable compressor.
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Copyright (C) 1996-2004 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1996-2004 Laszlo Molnar
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All Rights Reserved.
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UPX and the UCL library are free software; you can redistribute them
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and/or modify them under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING.
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If not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Markus F.X.J. Oberhumer Laszlo Molnar
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markus@oberhumer.com ml1050@cdata.tvnet.hu
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*/
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#ifndef __UPX_P_ELF_H
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#define __UPX_P_ELF_H
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/*************************************************************************
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// Some ELF type definitinons
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**************************************************************************/
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// The ELF file header. This appears at the start of every ELF file.
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struct Elf_LE32_Ehdr
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{
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unsigned char e_ident[16]; /* Magic number and other info */
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LE16 e_type; /* Object file type */
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LE16 e_machine; /* Architecture */
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LE32 e_version; /* Object file version */
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LE32 e_entry; /* Entry point virtual address */
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LE32 e_phoff; /* Program header table file offset */
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LE32 e_shoff; /* Section header table file offset */
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LE32 e_flags; /* Processor-specific flags */
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LE16 e_ehsize; /* ELF header size in bytes */
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LE16 e_phentsize; /* Program header table entry size */
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LE16 e_phnum; /* Program header table entry count */
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LE16 e_shentsize; /* Section header table entry size */
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LE16 e_shnum; /* Section header table entry count */
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LE16 e_shstrndx; /* Section header string table index */
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// Values for e_type
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enum {
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ET_NONE = 0, /* No file type */
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ET_REL = 1, /* Relocatable file */
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ET_EXEC = 2, /* Executable file */
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ET_DYN = 3, /* Shared object file */
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ET_CORE = 4 /* Core file */
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};
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}
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__attribute_packed;
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// Program segment header.
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struct Elf_LE32_Phdr
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{
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LE32 p_type; /* Segment type */
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LE32 p_offset; /* Segment file offset */
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LE32 p_vaddr; /* Segment virtual address */
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LE32 p_paddr; /* Segment physical address */
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LE32 p_filesz; /* Segment size in file */
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LE32 p_memsz; /* Segment size in memory */
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LE32 p_flags; /* Segment flags */
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LE32 p_align; /* Segment alignment */
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// Values for p_type
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enum {
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PT_LOAD = 1, /* Loadable program segment */
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PT_DYNAMIC = 2, /* Dynamic linking information */
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PT_PHDR = 6 /* Entry for header table itself */
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};
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// Values for p_flags
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enum { PF_X = (1 << 0) }; /* Segment is executable */
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enum { PF_W = (1 << 1) }; /* Segment is writable */
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enum { PF_R = (1 << 2) }; /* Segment is readable */
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}
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__attribute_packed;
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struct Elf_LE32_Shdr
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{
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LE32 sh_name; /* Section name (string tbl index) */
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LE32 sh_type; /* Section type */
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LE32 sh_flags; /* Section flags */
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LE32 sh_addr; /* Section virtual addr at execution */
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LE32 sh_offset; /* Section file offset */
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LE32 sh_size; /* Section size in bytes */
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LE32 sh_link; /* Link to another section */
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LE32 sh_info; /* Additional section information */
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LE32 sh_addralign; /* Section alignment */
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LE32 sh_entsize; /* Entry size if section holds table */
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enum { // values for sh_type
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SHT_NULL = 0, /* Section header table entry unused */
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SHT_PROGBITS = 1,/* Program data */
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SHT_SYMTAB = 2, /* Symbol table */
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SHT_STRTAB = 3, /* String table */
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SHT_RELA = 4, /* Relocation entries with addends */
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SHT_HASH = 5, /* Symbol hash table */
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SHT_DYNAMIC = 6, /* Dynamic linking information */
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SHT_NOTE = 7, /* Notes */
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SHT_NOBITS = 8, /* Program space with no data (bss) */
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SHT_REL = 9, /* Relocation entries, no addends */
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SHT_SHLIB = 10, /* Reserved */
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SHT_DYNSYM = 11, /* Dynamic linker symbol table */
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/* 12, 13 hole */
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SHT_INIT_ARRAY = 14, /* Array of constructors */
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SHT_FINI_ARRAY = 15, /* Array of destructors */
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SHT_PREINIT_ARRAY = 16, /* Array of pre-constructors */
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SHT_GROUP = 17, /* Section group */
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SHT_SYMTAB_SHNDX = 18, /* Extended section indeces */
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SHT_NUM = 19 /* Number of defined types. */
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};
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enum { // values for sh_flags
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SHF_WRITE = (1 << 0), /* Writable */
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SHF_ALLOC = (1 << 1), /* Occupies memory during execution */
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SHF_EXECINSTR = (1 << 2), /* Executable */
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SHF_MERGE = (1 << 4), /* Might be merged */
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SHF_STRINGS = (1 << 5), /* Contains nul-terminated strings */
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SHF_INFO_LINK = (1 << 6), /* `sh_info' contains SHT index */
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SHF_LINK_ORDER = (1 << 7), /* Preserve order after combining */
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};
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}
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__attribute_packed;
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struct Elf_LE32_Dyn
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{
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LE32 d_tag;
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LE32 d_val;
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enum { // tags
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DT_NULL = 0, /* End flag */
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DT_NEEDED = 1, /* Name of needed library */
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DT_STRTAB = 5, /* String table */
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DT_STRSZ = 10 /* Sizeof string table */
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};
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}
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__attribute_packed;
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#endif /* already included */
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/*
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vi:ts=4:et
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*/
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