180 lines
7.2 KiB
C
180 lines
7.2 KiB
C
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/* ELF support for BFD.
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Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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Written by Fred Fish @ Cygnus Support, from information published
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in "UNIX System V Release 4, Programmers Guide: ANSI C and
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Programming Support Tools".
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(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; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This file is part of ELF support for BFD, and contains the portions
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that are common to both the internal and external representations.
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For example, ELFMAG0 is the byte 0x7F in both the internal (in-memory)
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and external (in-file) representations. */
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/* Fields in e_ident[] */
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#define EI_MAG0 0 /* File identification byte 0 index */
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#define ELFMAG0 0x7F /* Magic number byte 0 */
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#define EI_MAG1 1 /* File identification byte 1 index */
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#define ELFMAG1 'E' /* Magic number byte 1 */
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#define EI_MAG2 2 /* File identification byte 2 index */
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#define ELFMAG2 'L' /* Magic number byte 2 */
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#define EI_MAG3 3 /* File identification byte 3 index */
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#define ELFMAG3 'F' /* Magic number byte 3 */
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#define EI_CLASS 4 /* File class */
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#define ELFCLASSNONE 0 /* Invalid class */
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#define ELFCLASS32 1 /* 32-bit objects */
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#define ELFCLASS64 2 /* 64-bit objects */
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#define EI_DATA 5 /* Data encoding */
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#define ELFDATANONE 0 /* Invalid data encoding */
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#define ELFDATA2LSB 1 /* 2's complement, little endian */
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#define ELFDATA2MSB 2 /* 2's complement, big endian */
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#define EI_VERSION 6 /* File version */
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#define EI_PAD 7 /* Start of padding bytes */
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/* Values for e_type, which identifies the object file 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_LOPROC 0xFF00 /* Processor-specific */
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#define ET_HIPROC 0xFFFF /* Processor-specific */
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/* Values for e_machine, which identifies the architecture */
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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 /* SUN SPARC */
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#define EM_386 3 /* Intel 80386 */
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#define EM_68K 4 /* Motorola m68k family */
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#define EM_88K 5 /* Motorola m88k family */
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#define EM_860 7 /* Intel 80860 */
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#define EM_MIPS 8 /* MIPS R3000 */
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/* Values for e_version */
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#define EV_NONE 0 /* Invalid ELF version */
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#define EV_CURRENT 1 /* Current version */
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/* Values for program header, p_type field */
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#define PT_NULL 0 /* Program header table entry unused */
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#define PT_LOAD 1 /* Loadable program segment */
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#define PT_DYNAMIC 2 /* Dynamic linking information */
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#define PT_INTERP 3 /* Program interpreter */
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#define PT_NOTE 4 /* Auxiliary information */
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#define PT_SHLIB 5 /* Reserved, unspecified semantics */
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#define PT_PHDR 6 /* Entry for header table itself */
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#define PT_LOPROC 0x70000000 /* Processor-specific */
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#define PT_HIPROC 0x7FFFFFFF /* Processor-specific */
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/* Program segment permissions, in program header p_flags field */
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#define PF_X (1 << 0) /* Segment is executable */
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#define PF_W (1 << 1) /* Segment is writable */
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#define PF_R (1 << 2) /* Segment is readable */
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#define PF_MASKPROC 0xF0000000 /* Processor-specific reserved bits */
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/* Values for section header, sh_type field */
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#define SHT_NULL 0 /* Section header table entry unused */
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#define SHT_PROGBITS 1 /* Program specific (private) data */
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#define SHT_SYMTAB 2 /* Link editing symbol table */
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#define SHT_STRTAB 3 /* A string table */
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#define SHT_RELA 4 /* Relocation entries with addends */
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#define SHT_HASH 5 /* A symbol hash table */
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#define SHT_DYNAMIC 6 /* Information for dynamic linking */
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#define SHT_NOTE 7 /* Information that marks file */
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#define SHT_NOBITS 8 /* Section occupies no space in file */
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#define SHT_REL 9 /* Relocation entries, no addends */
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#define SHT_SHLIB 10 /* Reserved, unspecified semantics */
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#define SHT_DYNSYM 11 /* Dynamic linking symbol table */
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#define SHT_BEPROGBITS 12 /* Possibly nonstandard section type
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for i860 processors operating in big
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endian mode. This section is used
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for code while SHT_PROGBITS is used
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for data. */
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#define SHT_LOPROC 0x70000000 /* Processor-specific semantics, lo */
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#define SHT_HIPROC 0x7FFFFFFF /* Processor-specific semantics, hi */
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#define SHT_LOUSER 0x80000000 /* Application-specific semantics */
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#define SHT_HIUSER 0x8FFFFFFF /* Application-specific semantics */
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/* Values for section header, sh_flags field */
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#define SHF_WRITE (1 << 0) /* Writable data during execution */
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#define SHF_ALLOC (1 << 1) /* Occupies memory during execution */
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#define SHF_EXECINSTR (1 << 2) /* Executable machine instructions */
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#define SHF_MASKPROC 0xF0000000 /* Processor-specific semantics */
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/* Values of note segment descriptor types for core files. */
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#define NT_PRSTATUS 1 /* Contains copy of prstatus struct */
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#define NT_FPREGSET 2 /* Contains copy of fpregset struct */
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#define NT_PRPSINFO 3 /* Contains copy of prpsinfo struct */
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/* These three macros disassemble and assemble a symbol table st_info field,
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which contains the symbol binding and symbol type. The STB_ and STT_
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defines identify the binding and type. */
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#define ELF_ST_BIND(val) (((unsigned int)(val)) >> 4)
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#define ELF_ST_TYPE(val) ((val) & 0xF)
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#define ELF_ST_INFO(bind,type) (((bind) << 4) + ((type) & 0xF))
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#define STB_LOCAL 0 /* Symbol not visible outside obj */
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#define STB_GLOBAL 1 /* Symbol visible outside obj */
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#define STB_WEAK 2 /* Like globals, lower precedence */
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#define STB_LOPROC 13 /* Application-specific semantics */
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#define STB_HIPROC 15 /* Application-specific semantics */
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#define STT_NOTYPE 0 /* Symbol type is unspecified */
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#define STT_OBJECT 1 /* Symbol is a data object */
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#define STT_FUNC 2 /* Symbol is a code object */
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#define STT_SECTION 3 /* Symbol associated with a section */
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#define STT_FILE 4 /* Symbol gives a file name */
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#define STT_LOPROC 13 /* Application-specific semantics */
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#define STT_HIPROC 15 /* Application-specific semantics */
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/* Special section indices, which may show up in st_shndx fields, among
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other places. */
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#define SHN_UNDEF 0 /* Undefined section reference */
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#define SHN_LORESERV 0xFF00 /* Begin range of reserved indices */
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#define SHN_LOPROC 0xFF00 /* Begin range of appl-specific */
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#define SHN_HIPROC 0xFF1F /* End range of appl-specific */
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#define SHN_ABS 0xFFF1 /* Associated symbol is absolute */
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#define SHN_COMMON 0xFFF2 /* Associated symbol is in common */
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#define SHN_HIRESERVE 0xFFFF /* End range of reserved indices */
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/* relocation info handling macros */
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#define ELF_R_SYM(i) ((i)>>8)
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#define ELF_R_TYPE(i) ((unsigned char)(i))
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#define ELF_R_INFO(s,t) (((s)<<8)+(unsigned char)(t))
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