NetBSD/gnu/dist/include/elf/common.h

338 lines
12 KiB
C

/* ELF support for BFD.
Copyright (C) 1991, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
Written by Fred Fish @ Cygnus Support, from information published
in "UNIX System V Release 4, Programmers Guide: ANSI C and
Programming Support Tools".
This file is part of BFD, the Binary File Descriptor library.
This program 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.
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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This file is part of ELF support for BFD, and contains the portions
that are common to both the internal and external representations.
For example, ELFMAG0 is the byte 0x7F in both the internal (in-memory)
and external (in-file) representations. */
#ifndef _ELF_COMMON_H
#define _ELF_COMMON_H
/* Fields in e_ident[] */
#define EI_MAG0 0 /* File identification byte 0 index */
#define ELFMAG0 0x7F /* Magic number byte 0 */
#define EI_MAG1 1 /* File identification byte 1 index */
#define ELFMAG1 'E' /* Magic number byte 1 */
#define EI_MAG2 2 /* File identification byte 2 index */
#define ELFMAG2 'L' /* Magic number byte 2 */
#define EI_MAG3 3 /* File identification byte 3 index */
#define ELFMAG3 'F' /* Magic number byte 3 */
#define EI_CLASS 4 /* File class */
#define ELFCLASSNONE 0 /* Invalid class */
#define ELFCLASS32 1 /* 32-bit objects */
#define ELFCLASS64 2 /* 64-bit objects */
#define EI_DATA 5 /* Data encoding */
#define ELFDATANONE 0 /* Invalid data encoding */
#define ELFDATA2LSB 1 /* 2's complement, little endian */
#define ELFDATA2MSB 2 /* 2's complement, big endian */
#define EI_VERSION 6 /* File version */
#define EI_PAD 7 /* Start of padding bytes */
/* Values for e_type, which identifies the object file type */
#define ET_NONE 0 /* No file type */
#define ET_REL 1 /* Relocatable file */
#define ET_EXEC 2 /* Executable file */
#define ET_DYN 3 /* Shared object file */
#define ET_CORE 4 /* Core file */
#define ET_LOPROC 0xFF00 /* Processor-specific */
#define ET_HIPROC 0xFFFF /* Processor-specific */
/* Values for e_machine, which identifies the architecture */
#define EM_NONE 0 /* No machine */
#define EM_M32 1 /* AT&T WE 32100 */
#define EM_SPARC 2 /* SUN SPARC */
#define EM_386 3 /* Intel 80386 */
#define EM_68K 4 /* Motorola m68k family */
#define EM_88K 5 /* Motorola m88k family */
#define EM_860 7 /* Intel 80860 */
#define EM_MIPS 8 /* MIPS R3000 (officially, big-endian only) */
#define EM_MIPS_RS4_BE 10 /* MIPS R4000 big-endian */
#define EM_SPARC64 43 /* Sun SPARC V9 (64-bit) */
#define EM_PARISC 15 /* HPPA */
#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
#define EM_PPC 20 /* PowerPC */
#define EM_SH 42 /* Hitachi SH */
/* If it is necessary to assign new unofficial EM_* values, please pick large
random numbers (0x8523, 0xa7f2, etc.) to minimize the chances of collision
with official or non-GNU unofficial values.
NOTE: Do not just increment the most recent number by one.
Somebody else somewhere will do exactly the same thing, and you
will have a collision. Instead, pick a random number. */
/* Cygnus PowerPC ELF backend. Written in the absence of an ABI. */
#define EM_CYGNUS_POWERPC 0x9025
/* Old version of PowerPC, this should be removed shortly. */
#define EM_PPC_OLD 17
/* Cygnus ARC ELF backend. Written in the absence of an ABI. */
#define EM_CYGNUS_ARC 0x9040
/* Cygnus M32R ELF backend. Written in the absence of an ABI. */
#define EM_CYGNUS_M32R 0x9041
/* Alpha backend magic number. Written in the absence of an ABI. */
#define EM_ALPHA 0x9026
/* D10V backend magic number. Written in the absence of an ABI. */
#define EM_CYGNUS_D10V 0x7650
/* V850 backend magic number. Written in the absense of an ABI. */
#define EM_CYGNUS_V850 0x9080
/* mn10200 and mn10300 backend magic numbers.
Written in the absense of an ABI. */
#define EM_CYGNUS_MN10200 0xdead
#define EM_CYGNUS_MN10300 0xbeef
/* See the above comment before you add a new EM_* value here. */
/* Values for e_version */
#define EV_NONE 0 /* Invalid ELF version */
#define EV_CURRENT 1 /* Current version */
/* Values for program header, p_type field */
#define PT_NULL 0 /* Program header table entry unused */
#define PT_LOAD 1 /* Loadable program segment */
#define PT_DYNAMIC 2 /* Dynamic linking information */
#define PT_INTERP 3 /* Program interpreter */
#define PT_NOTE 4 /* Auxiliary information */
#define PT_SHLIB 5 /* Reserved, unspecified semantics */
#define PT_PHDR 6 /* Entry for header table itself */
#define PT_LOPROC 0x70000000 /* Processor-specific */
#define PT_HIPROC 0x7FFFFFFF /* Processor-specific */
/* Program segment permissions, in program header p_flags field */
#define PF_X (1 << 0) /* Segment is executable */
#define PF_W (1 << 1) /* Segment is writable */
#define PF_R (1 << 2) /* Segment is readable */
#define PF_MASKPROC 0xF0000000 /* Processor-specific reserved bits */
/* Values for section header, sh_type field */
#define SHT_NULL 0 /* Section header table entry unused */
#define SHT_PROGBITS 1 /* Program specific (private) data */
#define SHT_SYMTAB 2 /* Link editing symbol table */
#define SHT_STRTAB 3 /* A string table */
#define SHT_RELA 4 /* Relocation entries with addends */
#define SHT_HASH 5 /* A symbol hash table */
#define SHT_DYNAMIC 6 /* Information for dynamic linking */
#define SHT_NOTE 7 /* Information that marks file */
#define SHT_NOBITS 8 /* Section occupies no space in file */
#define SHT_REL 9 /* Relocation entries, no addends */
#define SHT_SHLIB 10 /* Reserved, unspecified semantics */
#define SHT_DYNSYM 11 /* Dynamic linking symbol table */
/* The next three section types are defined by Solaris, and are named
SHT_SUNW*. We use them in GNU code, so we also define SHT_GNU*
versions. */
#define SHT_SUNW_verdef 0x6ffffffd /* Versions defined by file */
#define SHT_SUNW_verneed 0x6ffffffe /* Versions needed by file */
#define SHT_SUNW_versym 0x6fffffff /* Symbol versions */
#define SHT_GNU_verdef SHT_SUNW_verdef
#define SHT_GNU_verneed SHT_SUNW_verneed
#define SHT_GNU_versym SHT_SUNW_versym
#define SHT_LOPROC 0x70000000 /* Processor-specific semantics, lo */
#define SHT_HIPROC 0x7FFFFFFF /* Processor-specific semantics, hi */
#define SHT_LOUSER 0x80000000 /* Application-specific semantics */
#define SHT_HIUSER 0x8FFFFFFF /* Application-specific semantics */
/* Values for section header, sh_flags field */
#define SHF_WRITE (1 << 0) /* Writable data during execution */
#define SHF_ALLOC (1 << 1) /* Occupies memory during execution */
#define SHF_EXECINSTR (1 << 2) /* Executable machine instructions */
#define SHF_MASKPROC 0xF0000000 /* Processor-specific semantics */
/* Values of note segment descriptor types for core files. */
#define NT_PRSTATUS 1 /* Contains copy of prstatus struct */
#define NT_FPREGSET 2 /* Contains copy of fpregset struct */
#define NT_PRPSINFO 3 /* Contains copy of prpsinfo struct */
/* Values of note segment descriptor types for object files. */
/* (Only for hppa right now. Should this be moved elsewhere?) */
#define NT_VERSION 1 /* Contains a version string. */
/* These three macros disassemble and assemble a symbol table st_info field,
which contains the symbol binding and symbol type. The STB_ and STT_
defines identify the binding and type. */
#define ELF_ST_BIND(val) (((unsigned int)(val)) >> 4)
#define ELF_ST_TYPE(val) ((val) & 0xF)
#define ELF_ST_INFO(bind,type) (((bind) << 4) + ((type) & 0xF))
#define STN_UNDEF 0 /* undefined symbol index */
#define STB_LOCAL 0 /* Symbol not visible outside obj */
#define STB_GLOBAL 1 /* Symbol visible outside obj */
#define STB_WEAK 2 /* Like globals, lower precedence */
#define STB_LOPROC 13 /* Application-specific semantics */
#define STB_HIPROC 15 /* Application-specific semantics */
#define STT_NOTYPE 0 /* Symbol type is unspecified */
#define STT_OBJECT 1 /* Symbol is a data object */
#define STT_FUNC 2 /* Symbol is a code object */
#define STT_SECTION 3 /* Symbol associated with a section */
#define STT_FILE 4 /* Symbol gives a file name */
#define STT_LOPROC 13 /* Application-specific semantics */
#define STT_HIPROC 15 /* Application-specific semantics */
/* Special section indices, which may show up in st_shndx fields, among
other places. */
#define SHN_UNDEF 0 /* Undefined section reference */
#define SHN_LORESERVE 0xFF00 /* Begin range of reserved indices */
#define SHN_LOPROC 0xFF00 /* Begin range of appl-specific */
#define SHN_HIPROC 0xFF1F /* End range of appl-specific */
#define SHN_ABS 0xFFF1 /* Associated symbol is absolute */
#define SHN_COMMON 0xFFF2 /* Associated symbol is in common */
#define SHN_HIRESERVE 0xFFFF /* End range of reserved indices */
/* relocation info handling macros */
#define ELF32_R_SYM(i) ((i) >> 8)
#define ELF32_R_TYPE(i) ((i) & 0xff)
#define ELF32_R_INFO(s,t) (((s) << 8) + ((t) & 0xff))
#define ELF64_R_SYM(i) ((i) >> 32)
#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
#define ELF64_R_INFO(s,t) (((bfd_vma) (s) << 32) + (bfd_vma) (t))
/* Dynamic section 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
/* The next four dynamic tags are used on Solaris. We support them
everywhere. */
#define DT_VERDEF 0x6ffffffc
#define DT_VERDEFNUM 0x6ffffffd
#define DT_VERNEED 0x6ffffffe
#define DT_VERNEEDNUM 0x6fffffff
/* This tag is a GNU extension to the Solaris version scheme. */
#define DT_VERSYM 0x6ffffff0
#define DT_LOPROC 0x70000000
#define DT_HIPROC 0x7fffffff
/* These section tags are used on Solaris. We support them
everywhere, and hope they do not conflict. */
#define DT_AUXILIARY 0x7ffffffd
#define DT_FILTER 0x7fffffff
/* These constants are used for the version number of a Elf32_Verdef
structure. */
#define VER_DEF_NONE 0
#define VER_DEF_CURRENT 1
/* These constants appear in the vd_flags field of a Elf32_Verdef
structure. */
#define VER_FLG_BASE 0x1
#define VER_FLG_WEAK 0x2
/* These special constants can be found in an Elf32_Versym field. */
#define VER_NDX_LOCAL 0
#define VER_NDX_GLOBAL 1
/* These constants are used for the version number of a Elf32_Verneed
structure. */
#define VER_NEED_NONE 0
#define VER_NEED_CURRENT 1
/* This flag appears in a Versym structure. It means that the symbol
is hidden, and is only visible with an explicit version number.
This is a GNU extension. */
#define VERSYM_HIDDEN 0x8000
/* This is the mask for the rest of the Versym information. */
#define VERSYM_VERSION 0x7fff
/* This is a special token which appears as part of a symbol name. It
indictes that the rest of the name is actually the name of a
version node, and is not part of the actual name. This is a GNU
extension. For example, the symbol name `stat@ver2' is taken to
mean the symbol `stat' in version `ver2'. */
#define ELF_VER_CHR '@'
#endif /* _ELF_COMMON_H */