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upx/src/p_elf.h
Markus F.X.J. Oberhumer c4da5e81fa Welcome 2017.
2017-01-03 12:02:07 +01:00

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/* p_elf.h --
This file is part of the UPX executable compressor.
Copyright (C) 1996-2017 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996-2017 Laszlo Molnar
All Rights Reserved.
UPX and the UCL library are free software; you can redistribute them
and/or modify them 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.
This program 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 this program; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Markus F.X.J. Oberhumer Laszlo Molnar
<markus@oberhumer.com> <ezerotven+github@gmail.com>
*/
#ifndef __UPX_P_ELF_H
#define __UPX_P_ELF_H 1
/*************************************************************************
// N_Elf
**************************************************************************/
namespace N_Elf {
// integral types
template <class THalf, class TWord, class TXword, class TAddr, class TOff>
struct ElfITypes
{
typedef THalf Half;
typedef TWord Word;
typedef TXword Xword;
typedef TAddr Addr;
typedef TOff Off;
typedef THalf Section;
typedef THalf Versym;
};
// The ELF file header. This appears at the start of every ELF file.
template <class TElfITypes>
__packed_struct(Ehdr)
typedef typename TElfITypes::Half Half;
typedef typename TElfITypes::Word Word;
typedef typename TElfITypes::Addr Addr;
typedef typename TElfITypes::Off Off;
unsigned char e_ident[16]; /* Magic number and other info */
Half e_type; /* Object file type */
Half e_machine; /* Architecture */
Word e_version; /* Object file version */
Addr e_entry; /* Entry point virtual address */
Off e_phoff; /* Program header table file offset */
Off e_shoff; /* Section header table file offset */
Word e_flags; /* Processor-specific flags */
Half e_ehsize; /* ELF header size in bytes */
Half e_phentsize; /* Program header table entry size */
Half e_phnum; /* Program header table entry count */
Half e_shentsize; /* Section header table entry size */
Half e_shnum; /* Section header table entry count */
Half e_shstrndx; /* Section header string table index */
# define WANT_EHDR_ENUM 1
# include "p_elf_enum.h"
__packed_struct_end()
template <class TElfITypes>
__packed_struct(Dyn)
typedef typename TElfITypes::Xword Xword;
typedef typename TElfITypes::Addr Addr;
Xword d_tag;
Addr d_val;
# define WANT_DYN_ENUM 1
# include "p_elf_enum.h"
__packed_struct_end()
template <class TElfITypes>
__packed_struct(Rel)
typedef typename TElfITypes::Xword Xword;
typedef typename TElfITypes::Addr Addr;
Addr r_offset;
Xword r_info;
__packed_struct_end()
template <class TElfITypes>
__packed_struct(Rela)
typedef typename TElfITypes::Xword Xword;
typedef typename TElfITypes::Addr Addr;
Addr r_offset;
Xword r_info;
Xword r_addend;
__packed_struct_end()
template <class TElfITypes>
__packed_struct(External_Note)
typedef typename TElfITypes::Word Word;
Word xn_namesz; // includes terminating '\0'
Word xn_datasz;
Word xn_type;
//char xn_name[N]; // terminate with '\0'
//char xn_data[M]; // aligned to 0 mod 4
__packed_struct_end()
} // namespace N_Elf
/*************************************************************************
// N_Elf32
**************************************************************************/
namespace N_Elf32 {
template <class TElfITypes>
__packed_struct(Phdr)
typedef typename TElfITypes::Word Word;
typedef typename TElfITypes::Addr Addr;
typedef typename TElfITypes::Off Off;
Word p_type; /* Segment type */
Off p_offset; /* Segment file offset */
Addr p_vaddr; /* Segment virtual address */
Addr p_paddr; /* Segment physical address */
Word p_filesz; /* Segment size in file */
Word p_memsz; /* Segment size in memory */
Word p_flags; /* Segment flags */
Word p_align; /* Segment alignment */
# define WANT_PHDR_ENUM 1
# include "p_elf_enum.h"
__packed_struct_end()
template <class TElfITypes>
__packed_struct(Shdr)
typedef typename TElfITypes::Word Word;
typedef typename TElfITypes::Addr Addr;
typedef typename TElfITypes::Off Off;
Word sh_name; /* Section name (string tbl index) */
Word sh_type; /* Section type */
Word sh_flags; /* Section flags */
Addr sh_addr; /* Section virtual addr at execution */
Off sh_offset; /* Section file offset */
Word sh_size; /* Section size in bytes */
Word sh_link; /* Link to another section */
Word sh_info; /* Additional section information */
Word sh_addralign; /* Section alignment */
Word sh_entsize; /* Entry size if section holds table */
# define WANT_SHDR_ENUM 1
# include "p_elf_enum.h"
__packed_struct_end()
template <class TElfITypes>
__packed_struct(Sym)
typedef typename TElfITypes::Word Word;
typedef typename TElfITypes::Addr Addr;
typedef typename TElfITypes::Section Section;
Word st_name; /* symbol name (index into string table) */
Addr st_value; /* symbol value */
Word st_size; /* symbol size */
unsigned char st_info; /* symbol type and binding */
unsigned char st_other; /* symbol visibility */
Section st_shndx; /* section index */
# define WANT_SYM_ENUM 1
# include "p_elf_enum.h"
static unsigned int get_st_bind(unsigned x) { return 0xf & (x>>4); }
static unsigned int get_st_type(unsigned x) { return 0xf & x ; }
static unsigned char make_st_info(unsigned bind, unsigned type)
{ return (unsigned char) (((bind<<4) + (0xf & type)) & 0xff); }
__packed_struct_end()
} // namespace N_Elf32
/*************************************************************************
// N_Elf64
**************************************************************************/
namespace N_Elf64 {
template <class TElfITypes>
__packed_struct(Phdr)
typedef typename TElfITypes::Word Word;
typedef typename TElfITypes::Xword Xword;
typedef typename TElfITypes::Addr Addr;
typedef typename TElfITypes::Off Off;
Word p_type; /* Segment type */
Word p_flags; /* Segment flags */
Off p_offset; /* Segment file offset */
Addr p_vaddr; /* Segment virtual address */
Addr p_paddr; /* Segment physical address */
Xword p_filesz; /* Segment size in file */
Xword p_memsz; /* Segment size in memory */
Xword p_align; /* Segment alignment */
# define WANT_PHDR_ENUM 1
# include "p_elf_enum.h"
__packed_struct_end()
template <class TElfITypes>
__packed_struct(Shdr)
typedef typename TElfITypes::Word Word;
typedef typename TElfITypes::Xword Xword;
typedef typename TElfITypes::Addr Addr;
typedef typename TElfITypes::Off Off;
Word sh_name; /* Section name (string tbl index) */
Word sh_type; /* Section type */
Xword sh_flags; /* Section flags */
Addr sh_addr; /* Section virtual addr at execution */
Off sh_offset; /* Section file offset */
Xword sh_size; /* Section size in bytes */
Word sh_link; /* Link to another section */
Word sh_info; /* Additional section information */
Xword sh_addralign; /* Section alignment */
Xword sh_entsize; /* Entry size if section holds table */
# define WANT_SHDR_ENUM 1
# include "p_elf_enum.h"
__packed_struct_end()
template <class TElfITypes>
__packed_struct(Sym)
typedef typename TElfITypes::Word Word;
typedef typename TElfITypes::Xword Xword;
typedef typename TElfITypes::Addr Addr;
typedef typename TElfITypes::Section Section;
Word st_name; /* symbol name (index into string table) */
unsigned char st_info; /* symbol type and binding */
unsigned char st_other; /* symbol visibility */
Section st_shndx; /* section index */
Addr st_value; /* symbol value */
Xword st_size; /* symbol size */
# define WANT_SYM_ENUM 1
# include "p_elf_enum.h"
static unsigned int get_st_bind(unsigned x) { return 0xf & (x>>4); }
static unsigned int get_st_type(unsigned x) { return 0xf & x ; }
static unsigned char make_st_info(unsigned bind, unsigned type)
{ return (unsigned char) (((bind<<4) + (0xf & type)) & 0xff); }
__packed_struct_end()
} // namespace N_Elf64
/*************************************************************************
// aggregate types into an ElfClass
**************************************************************************/
namespace N_Elf {
template <class TP>
struct ElfClass_32
{
typedef TP BeLePolicy;
// integral types (target endianness)
typedef typename TP::U16 TE16;
typedef typename TP::U32 TE32;
typedef typename TP::U64 TE64;
typedef N_Elf::ElfITypes<TE16, TE32, TE32, TE32, TE32> ElfITypes;
// ELF types
typedef N_Elf ::Ehdr<ElfITypes> Ehdr;
typedef N_Elf32::Phdr<ElfITypes> Phdr;
typedef N_Elf32::Shdr<ElfITypes> Shdr;
typedef N_Elf ::Dyn <ElfITypes> Dyn;
typedef N_Elf ::Rel <ElfITypes> Rel;
typedef N_Elf ::Rela<ElfITypes> Rela;
typedef N_Elf32::Sym <ElfITypes> Sym;
typedef N_Elf ::External_Note<ElfITypes> External_Note;
static void compileTimeAssertions() {
BeLePolicy::compileTimeAssertions();
COMPILE_TIME_ASSERT(sizeof(Ehdr) == 52)
COMPILE_TIME_ASSERT(sizeof(Phdr) == 32)
COMPILE_TIME_ASSERT(sizeof(Shdr) == 40)
COMPILE_TIME_ASSERT(sizeof(Dyn) == 8)
COMPILE_TIME_ASSERT(sizeof(Rel) == 8)
COMPILE_TIME_ASSERT(sizeof(Rela) == 12)
COMPILE_TIME_ASSERT(sizeof(Sym) == 16)
COMPILE_TIME_ASSERT_ALIGNED1(Ehdr)
COMPILE_TIME_ASSERT_ALIGNED1(Phdr)
COMPILE_TIME_ASSERT_ALIGNED1(Shdr)
COMPILE_TIME_ASSERT_ALIGNED1(Dyn)
COMPILE_TIME_ASSERT_ALIGNED1(Rel)
COMPILE_TIME_ASSERT_ALIGNED1(Rela)
COMPILE_TIME_ASSERT_ALIGNED1(Sym)
}
};
template <class TP>
struct ElfClass_64
{
typedef TP BeLePolicy;
// integral types (target endianness)
typedef typename TP::U16 TE16;
typedef typename TP::U32 TE32;
typedef typename TP::U64 TE64;
typedef N_Elf::ElfITypes<TE16, TE32, TE64, TE64, TE64> ElfITypes;
// ELF types
typedef N_Elf ::Ehdr<ElfITypes> Ehdr;
typedef N_Elf64::Phdr<ElfITypes> Phdr;
typedef N_Elf64::Shdr<ElfITypes> Shdr;
typedef N_Elf ::Dyn <ElfITypes> Dyn;
typedef N_Elf ::Rel <ElfITypes> Rel;
typedef N_Elf ::Rela<ElfITypes> Rela;
typedef N_Elf64::Sym <ElfITypes> Sym;
typedef N_Elf ::External_Note<ElfITypes> External_Note;
static void compileTimeAssertions() {
BeLePolicy::compileTimeAssertions();
COMPILE_TIME_ASSERT(sizeof(Ehdr) == 64)
COMPILE_TIME_ASSERT(sizeof(Phdr) == 56)
COMPILE_TIME_ASSERT(sizeof(Shdr) == 64)
COMPILE_TIME_ASSERT(sizeof(Dyn) == 16)
COMPILE_TIME_ASSERT(sizeof(Rel) == 16)
COMPILE_TIME_ASSERT(sizeof(Rela) == 24)
COMPILE_TIME_ASSERT(sizeof(Sym) == 24)
COMPILE_TIME_ASSERT_ALIGNED1(Ehdr)
COMPILE_TIME_ASSERT_ALIGNED1(Phdr)
COMPILE_TIME_ASSERT_ALIGNED1(Shdr)
COMPILE_TIME_ASSERT_ALIGNED1(Dyn)
COMPILE_TIME_ASSERT_ALIGNED1(Rel)
COMPILE_TIME_ASSERT_ALIGNED1(Rela)
COMPILE_TIME_ASSERT_ALIGNED1(Sym)
}
};
} // namespace N_Elf
typedef N_Elf::ElfClass_32<N_BELE_CTP::HostPolicy> ElfClass_Host32;
typedef N_Elf::ElfClass_64<N_BELE_CTP::HostPolicy> ElfClass_Host64;
typedef N_Elf::ElfClass_32<N_BELE_CTP::BEPolicy> ElfClass_BE32;
typedef N_Elf::ElfClass_64<N_BELE_CTP::BEPolicy> ElfClass_BE64;
typedef N_Elf::ElfClass_32<N_BELE_CTP::LEPolicy> ElfClass_LE32;
typedef N_Elf::ElfClass_64<N_BELE_CTP::LEPolicy> ElfClass_LE64;
/*************************************************************************
// shortcuts
**************************************************************************/
typedef ElfClass_Host32::Ehdr Elf32_Ehdr;
typedef ElfClass_Host32::Phdr Elf32_Phdr;
typedef ElfClass_Host32::Shdr Elf32_Shdr;
typedef ElfClass_Host32::Dyn Elf32_Dyn;
typedef ElfClass_Host32::Rel Elf32_Rel;
typedef ElfClass_Host32::Rela Elf32_Rela;
typedef ElfClass_Host32::Sym Elf32_Sym;
typedef ElfClass_Host32::External_Note Elf32_External_Note;
typedef ElfClass_Host64::Ehdr Elf64_Ehdr;
typedef ElfClass_Host64::Phdr Elf64_Phdr;
typedef ElfClass_Host64::Shdr Elf64_Shdr;
typedef ElfClass_Host64::Dyn Elf64_Dyn;
typedef ElfClass_Host64::Rel Elf64_Rel;
typedef ElfClass_Host64::Rela Elf64_Rela;
typedef ElfClass_Host64::Sym Elf64_Sym;
typedef ElfClass_Host64::External_Note Elf64_External_Note;
typedef ElfClass_BE32::Ehdr Elf_BE32_Ehdr;
typedef ElfClass_BE32::Phdr Elf_BE32_Phdr;
typedef ElfClass_BE32::Shdr Elf_BE32_Shdr;
typedef ElfClass_BE32::Dyn Elf_BE32_Dyn;
typedef ElfClass_BE32::Rel Elf_BE32_Rel;
typedef ElfClass_BE32::Rela Elf_BE32_Rela;
typedef ElfClass_BE32::Sym Elf_BE32_Sym;
typedef ElfClass_BE32::External_Note Elf_BE32_External_Note;
typedef ElfClass_BE64::Ehdr Elf_BE64_Ehdr;
typedef ElfClass_BE64::Phdr Elf_BE64_Phdr;
typedef ElfClass_BE64::Shdr Elf_BE64_Shdr;
typedef ElfClass_BE64::Dyn Elf_BE64_Dyn;
typedef ElfClass_BE64::Rel Elf_BE64_Rel;
typedef ElfClass_BE64::Rela Elf_BE64_Rela;
typedef ElfClass_BE64::Sym Elf_BE64_Sym;
typedef ElfClass_BE64::External_Note Elf_BE64_External_Note;
typedef ElfClass_LE32::Ehdr Elf_LE32_Ehdr;
typedef ElfClass_LE32::Phdr Elf_LE32_Phdr;
typedef ElfClass_LE32::Shdr Elf_LE32_Shdr;
typedef ElfClass_LE32::Dyn Elf_LE32_Dyn;
typedef ElfClass_LE32::Rel Elf_LE32_Rel;
typedef ElfClass_LE32::Rela Elf_LE32_Rela;
typedef ElfClass_LE32::Sym Elf_LE32_Sym;
typedef ElfClass_LE32::External_Note Elf_LE32_External_Note;
typedef ElfClass_LE64::Ehdr Elf_LE64_Ehdr;
typedef ElfClass_LE64::Phdr Elf_LE64_Phdr;
typedef ElfClass_LE64::Shdr Elf_LE64_Shdr;
typedef ElfClass_LE64::Dyn Elf_LE64_Dyn;
typedef ElfClass_LE64::Rel Elf_LE64_Rel;
typedef ElfClass_LE64::Rela Elf_LE64_Rela;
typedef ElfClass_LE64::Sym Elf_LE64_Sym;
typedef ElfClass_LE64::External_Note Elf_LE64_External_Note;
#endif /* already included */
/* vim:set ts=4 sw=4 et: */
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