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@ -1,6 +1,6 @@ |
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/* $Id: elf_abi.h,v 1.3 1996/04/29 00:54:15 etheisen Exp $ */ |
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/* $OpenBSD: elf_abi.h,v 1.4 1996/05/22 07:46:22 etheisen Exp $ */ |
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/* |
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* Copyright (c) 1995, 1996 Erik Theisen |
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* Copyright (c) 1996 Erik Theisen |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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@ -25,322 +25,9 @@ |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef _ELF_ABI_H_ |
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#define _ELF_ABI_H_ |
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#include <machine/types.h> |
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/* |
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* These typedefs need to be handled better - |
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* doesn't work on 64-bit machines. Note: |
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* there currently isn't a 64-bit ABI. |
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*/ |
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typedef u_int32_t Elf32_Addr; /* Unsigned program address */ |
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typedef u_int32_t Elf32_Off; /* Unsigned file offset */ |
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typedef int32_t Elf32_Sword; /* Signed large integer */ |
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typedef u_int32_t Elf32_Word; /* Unsigned large integer */ |
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typedef u_int16_t Elf32_Half; /* Unsigned medium integer */ |
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/* e_ident[] identification indexes */ |
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#define EI_MAG0 0 /* file ID */ |
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#define EI_MAG1 1 /* file ID */ |
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#define EI_MAG2 2 /* file ID */ |
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#define EI_MAG3 3 /* file ID */ |
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#define EI_CLASS 4 /* file class */ |
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#define EI_DATA 5 /* data encoding */ |
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#define EI_VERSION 6 /* ELF header version */ |
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#define EI_PAD 7 /* start of pad bytes */ |
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#define EI_NIDENT 16 /* Size of e_ident[] */ |
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/* e_ident[] magic number */ |
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#define ELFMAG0 0x7f /* e_ident[EI_MAG0] */ |
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#define ELFMAG1 'E' /* e_ident[EI_MAG1] */ |
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#define ELFMAG2 'L' /* e_ident[EI_MAG2] */ |
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#define ELFMAG3 'F' /* e_ident[EI_MAG3] */ |
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#define ELFMAG "\177ELF" /* magic */ |
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#define SELFMAG 4 /* size of magic */ |
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/* e_ident[] file class */ |
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#define ELFCLASSNONE 0 /* invalid */ |
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#define ELFCLASS32 1 /* 32-bit objs */ |
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#define ELFCLASS64 2 /* 64-bit objs */ |
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#define ELFCLASSNUM 3 /* number of classes */ |
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/* e_ident[] data encoding */ |
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#define ELFDATANONE 0 /* invalid */ |
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#define ELFDATA2LSB 1 /* Little-Endian */ |
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#define ELFDATA2MSB 2 /* Big-Endian */ |
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#define ELFDATANUM 3 /* number of data encode defines */ |
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/* e_ident */ |
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#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ |
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(ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ |
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(ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ |
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(ehdr).e_ident[EI_MAG3] == ELFMAG3) |
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/* ELF Header */ |
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typedef struct elfhdr{ |
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unsigned char e_ident[EI_NIDENT]; /* ELF Identification */ |
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Elf32_Half e_type; /* object file type */ |
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Elf32_Half e_machine; /* machine */ |
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Elf32_Word e_version; /* object file version */ |
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Elf32_Addr e_entry; /* virtual entry point */ |
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Elf32_Off e_phoff; /* program header table offset */ |
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Elf32_Off e_shoff; /* section header table offset */ |
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Elf32_Word e_flags; /* processor-specific flags */ |
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Elf32_Half e_ehsize; /* ELF header size */ |
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Elf32_Half e_phentsize; /* program header entry size */ |
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Elf32_Half e_phnum; /* number of program header entries */ |
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Elf32_Half e_shentsize; /* section header entry size */ |
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Elf32_Half e_shnum; /* number of section header entries */ |
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Elf32_Half e_shstrndx; /* section header table's "section |
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header string table" entry offset */ |
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} Elf32_Ehdr; |
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/* e_type */ |
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#define ET_NONE 0 /* No file type */ |
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#define ET_REL 1 /* relocatable file */ |
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#define ET_EXEC 2 /* executable file */ |
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#define ET_DYN 3 /* shared object file */ |
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#define ET_CORE 4 /* core file */ |
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#define ET_NUM 5 /* number of types */ |
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#define ET_LOPROC 0xff00 /* reserved range for processor */ |
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#define ET_HIPROC 0xffff /* specific e_type */ |
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/* e_machine */ |
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#define EM_NONE 0 /* No Machine */ |
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#define EM_M32 1 /* AT&T WE 32100 */ |
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#define EM_SPARC 2 /* SPARC */ |
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#define EM_386 3 /* Intel 80386 */ |
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#define EM_68K 4 /* Motorola 68000 */ |
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#define EM_88K 5 /* Motorola 88000 */ |
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#define EM_486 6 /* Intel 80486 - unused? */ |
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#define EM_860 7 /* Intel 80860 */ |
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#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ |
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/* |
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* Don't know if EM_MIPS_RS4_BE, |
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* EM_SPARC64, EM_PARISC, |
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* or EM_PPC are ABI compliant |
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*/ |
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#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ |
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#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */ |
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#define EM_PARISC 15 /* HPPA */ |
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#define EM_PPC 20 /* PowerPC */ |
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#define EM_NUM 13 /* number of machine types */ |
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/* Version */ |
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#define EV_NONE 0 /* Invalid */ |
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#define EV_CURRENT 1 /* Current */ |
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#define EV_NUM 2 /* number of versions */ |
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/* Section Header */ |
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typedef struct { |
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Elf32_Word sh_name; /* name - index into section header |
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string table section */ |
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Elf32_Word sh_type; /* type */ |
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Elf32_Word sh_flags; /* flags */ |
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Elf32_Addr sh_addr; /* address */ |
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Elf32_Off sh_offset; /* file offset */ |
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Elf32_Word sh_size; /* section size */ |
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Elf32_Word sh_link; /* section header table index link */ |
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Elf32_Word sh_info; /* extra information */ |
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Elf32_Word sh_addralign; /* address alignment */ |
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Elf32_Word sh_entsize; /* section entry size */ |
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} Elf32_Shdr; |
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/* Special Section Indexes */ |
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#define SHN_UNDEF 0 /* undefined */ |
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#define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */ |
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#define SHN_LOPROC 0xff00 /* reserved range for processor */ |
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#define SHN_HIPROC 0xff1f /* specific section indexes */ |
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#define SHN_ABS 0xfff1 /* absolute value */ |
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#define SHN_COMMON 0xfff2 /* common symbol */ |
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#define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */ |
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/* sh_type */ |
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#define SHT_NULL 0 /* inactive */ |
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#define SHT_PROGBITS 1 /* program defined information */ |
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#define SHT_SYMTAB 2 /* symbol table section */ |
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#define SHT_STRTAB 3 /* string table section */ |
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#define SHT_RELA 4 /* relocation section with addends*/ |
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#define SHT_HASH 5 /* symbol hash table section */ |
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#define SHT_DYNAMIC 6 /* dynamic section */ |
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#define SHT_NOTE 7 /* note section */ |
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#define SHT_NOBITS 8 /* no space section */ |
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#define SHT_REL 9 /* relation section without addends */ |
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#define SHT_SHLIB 10 /* reserved - purpose unknown */ |
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#define SHT_DYNSYM 11 /* dynamic symbol table section */ |
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#define SHT_OPENBSD 0xffffffff /* OpenBSD hack to determine targ OS */ |
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/* - This is NOT ABI compliant!!! */ |
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#define SHT_NUM 13 /* number of section types */ |
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#define SHT_LOPROC 0x70000000 /* reserved range for processor */ |
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#define SHT_HIPROC 0x7fffffff /* specific section header types */ |
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#define SHT_LOUSER 0x80000000 /* reserved range for application */ |
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#define SHT_HIUSER 0xffffffff /* specific indexes */ |
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/* Section names */ |
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#define ELF_BSS ".bss" /* uninitialized data */ |
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#define ELF_DATA ".data" /* initialized data */ |
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#define ELF_DEBUG ".debug" /* debug */ |
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#define ELF_DYNAMIC ".dynamic" /* dynamic linking information */ |
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#define ELF_DYNSTR ".dynstr" /* dynamic string table */ |
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#define ELF_DYNSYM ".dynsym" /* dynamic symbol table */ |
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#define ELF_FINI ".fini" /* termination code */ |
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#define ELF_GOT ".got" /* global offset table */ |
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#define ELF_HASH ".hash" /* symbol hash table */ |
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#define ELF_INIT ".init" /* initialization code */ |
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#define ELF_REL_DATA ".rel.data" /* relocation data */ |
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#define ELF_REL_FINI ".rel.fini" /* relocation termination code */ |
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#define ELF_REL_INIT ".rel.init" /* relocation initialization code */ |
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#define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */ |
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#define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */ |
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#define ELF_REL_TEXT ".rel.text" /* relocation code */ |
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#define ELF_RODATA ".rodata" /* read-only data */ |
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#define ELF_SHSTRTAB ".shstrtab" /* section header string table */ |
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#define ELF_STRTAB ".strtab" /* string table */ |
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#define ELF_SYMTAB ".symtab" /* symbol table */ |
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#define ELF_TEXT ".text" /* code */ |
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#define ELF_OPENBSD ".openbsd" /* OpenBSD hack to determine targ OS */ |
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/* - This is NOT ABI compliant!!! */ |
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/* Section Attribute Flags - sh_flags */ |
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#define SHF_WRITE 0x1 /* Writable */ |
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#define SHF_ALLOC 0x2 /* occupies memory */ |
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#define SHF_EXECINSTR 0x4 /* executable */ |
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#define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */ |
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/* specific section attributes */ |
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/* Symbol Table Entry */ |
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typedef struct elf32_sym { |
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Elf32_Word st_name; /* name - index into string table */ |
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Elf32_Addr st_value; /* symbol value */ |
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Elf32_Word st_size; /* symbol size */ |
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unsigned char st_info; /* type and binding */ |
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unsigned char st_other; /* 0 - no defined meaning */ |
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Elf32_Half st_shndx; /* section header index */ |
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} Elf32_Sym; |
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/* Symbol table index */ |
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#define STN_UNDEF 0 /* undefined */ |
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/* Extract symbol info - st_info */ |
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#define ELF32_ST_BIND(x) ((x) >> 4) |
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#define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf) |
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#define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) |
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/* Symbol Binding - ELF32_ST_BIND - st_info */ |
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#define STB_LOCAL 0 /* Local symbol */ |
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#define STB_GLOBAL 1 /* Global symbol */ |
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#define STB_WEAK 2 /* like global - lower precedence */ |
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#define STB_NUM 3 /* number of symbol bindings */ |
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#define STB_LOPROC 13 /* reserved range for processor */ |
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#define STB_HIPROC 15 /* specific symbol bindings */ |
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/* Symbol type - ELF32_ST_TYPE - st_info */ |
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#define STT_NOTYPE 0 /* not specified */ |
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#define STT_OBJECT 1 /* data object */ |
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#define STT_FUNC 2 /* function */ |
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#define STT_SECTION 3 /* section */ |
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#define STT_FILE 4 /* file */ |
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#define STT_NUM 5 /* number of symbol types */ |
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#define STT_LOPROC 13 /* reserved range for processor */ |
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#define STT_HIPROC 15 /* specific symbol types */ |
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/* Relocation entry with implicit addend */ |
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typedef struct |
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{ |
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Elf32_Addr r_offset; /* offset of relocation */ |
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Elf32_Word r_info; /* symbol table index and type */ |
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} Elf32_Rel; |
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/* Relocation entry with explicit addend */ |
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typedef struct |
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{ |
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Elf32_Addr r_offset; /* offset of relocation */ |
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Elf32_Word r_info; /* symbol table index and type */ |
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Elf32_Sword r_addend; |
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} Elf32_Rela; |
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/* Extract relocation info - r_info */ |
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#define ELF32_R_SYM(i) ((i) >> 8) |
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#define ELF32_R_TYPE(i) ((unsigned char) (i)) |
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#define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t)) |
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/* Program Header */ |
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typedef struct { |
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Elf32_Word p_type; /* segment type */ |
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Elf32_Off p_offset; /* segment offset */ |
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Elf32_Addr p_vaddr; /* virtual address of segment */ |
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Elf32_Addr p_paddr; /* physical address - ignored? */ |
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Elf32_Word p_filesz; /* number of bytes in file for seg. */ |
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Elf32_Word p_memsz; /* number of bytes in mem. for seg. */ |
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Elf32_Word p_flags; /* flags */ |
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Elf32_Word p_align; /* memory alignment */ |
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} Elf32_Phdr; |
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/* Segment types - p_type */ |
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#define PT_NULL 0 /* unused */ |
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#define PT_LOAD 1 /* loadable segment */ |
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#define PT_DYNAMIC 2 /* dynamic linking section */ |
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#define PT_INTERP 3 /* the RTLD */ |
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#define PT_NOTE 4 /* auxiliary information */ |
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#define PT_SHLIB 5 /* reserved - purpose undefined */ |
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#define PT_PHDR 6 /* program header */ |
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#define PT_NUM 7 /* Number of segment types */ |
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#define PT_LOPROC 0x70000000 /* reserved range for processor */ |
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#define PT_HIPROC 0x7fffffff /* specific segment types */ |
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/* Segment flags - p_flags */ |
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#define PF_X 0x1 /* Executable */ |
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#define PF_W 0x2 /* Writable */ |
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#define PF_R 0x4 /* Readable */ |
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#define PF_MASKPROC 0xf0000000 /* reserved bits for processor */ |
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/* specific segment flags */ |
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/* Dynamic structure */ |
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typedef struct |
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{ |
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Elf32_Sword d_tag; /* controls meaning of d_val */ |
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union |
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{ |
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Elf32_Word d_val; /* Multiple meanings - see d_tag */ |
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Elf32_Addr d_ptr; /* program virtual address */ |
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} d_un; |
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} Elf32_Dyn; |
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extern Elf32_Dyn _DYNAMIC[]; |
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/* Dynamic Array Tags - d_tag */ |
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#define DT_NULL 0 /* marks end of _DYNAMIC array */ |
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#define DT_NEEDED 1 /* string table offset of needed lib */ |
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#define DT_PLTRELSZ 2 /* size of relocation entries in PLT */ |
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#define DT_PLTGOT 3 /* address PLT/GOT */ |
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#define DT_HASH 4 /* address of symbol hash table */ |
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#define DT_STRTAB 5 /* address of string table */ |
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#define DT_SYMTAB 6 /* address of symbol table */ |
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#define DT_RELA 7 /* address of relocation table */ |
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#define DT_RELASZ 8 /* size of relocation table */ |
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#define DT_RELAENT 9 /* size of relocation entry */ |
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#define DT_STRSZ 10 /* size of string table */ |
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#define DT_SYMENT 11 /* size of symbol table entry */ |
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#define DT_INIT 12 /* address of initialization func. */ |
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#define DT_FINI 13 /* address of termination function */ |
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#define DT_SONAME 14 /* string table offset of shared obj */ |
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#define DT_RPATH 15 /* string table offset of library |
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/* search path */ |
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#define DT_SYMBOLIC 16 /* start sym search in shared obj. */ |
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#define DT_REL 17 /* address of rel. tbl. w addends */ |
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#define DT_RELSZ 18 /* size of DT_REL relocation table */ |
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#define DT_RELENT 19 /* size of DT_REL relocation entry */ |
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#define DT_PLTREL 20 /* PLT referenced relocation entry */ |
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#define DT_DEBUG 21 /* bugger */ |
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#define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */ |
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#define DT_JMPREL 23 /* add. of PLT's relocation entries */ |
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#define DT_LOPROC 0x70000000 /* reserved range for processor */ |
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#define DT_HIPROC 0x7fffffff /* specific dynamic array tags */ |
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/* Standard ELF hashing function */ |
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unsigned long elf_hash(const unsigned char *name); |
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#include <sys/exec_elf.h> |
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#endif /* _ELF_ABI_H_ */ |
etheisen
29 years ago