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204 lines
7.6 KiB
C
204 lines
7.6 KiB
C
/* ELF support for BFD.
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Copyright (C) 1991, 1992, 1993, 1994 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This file is part of ELF support for BFD, and contains the portions
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that describe how ELF is represented internally in the BFD library.
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I.E. it describes the in-memory representation of ELF. It requires
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the elf-common.h file which contains the portions that are common to
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both the internal and external representations. */
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/* NOTE that these structures are not kept in the same order as they appear
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in the object file. In some cases they've been reordered for more optimal
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packing under various circumstances. */
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#ifndef _ELF_INTERNAL_H
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#define _ELF_INTERNAL_H
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/* ELF Header */
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#define EI_NIDENT 16 /* Size of e_ident[] */
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typedef struct elf_internal_ehdr {
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unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
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bfd_vma e_entry; /* Entry point virtual address */
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bfd_signed_vma e_phoff; /* Program header table file offset */
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bfd_signed_vma e_shoff; /* Section header table file offset */
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unsigned long e_version; /* Identifies object file version */
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unsigned long e_flags; /* Processor-specific flags */
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unsigned short e_type; /* Identifies object file type */
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unsigned short e_machine; /* Specifies required architecture */
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unsigned short e_ehsize; /* ELF header size in bytes */
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unsigned short e_phentsize; /* Program header table entry size */
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unsigned short e_phnum; /* Program header table entry count */
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unsigned short e_shentsize; /* Section header table entry size */
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unsigned short e_shnum; /* Section header table entry count */
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unsigned short e_shstrndx; /* Section header string table index */
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} Elf_Internal_Ehdr;
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#define elf32_internal_ehdr elf_internal_ehdr
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#define Elf32_Internal_Ehdr Elf_Internal_Ehdr
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#define elf64_internal_ehdr elf_internal_ehdr
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#define Elf64_Internal_Ehdr Elf_Internal_Ehdr
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/* Program header */
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struct elf_internal_phdr {
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unsigned long p_type; /* Identifies program segment type */
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unsigned long p_flags; /* Segment flags */
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bfd_vma p_offset; /* Segment file offset */
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bfd_vma p_vaddr; /* Segment virtual address */
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bfd_vma p_paddr; /* Segment physical address */
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bfd_vma p_filesz; /* Segment size in file */
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bfd_vma p_memsz; /* Segment size in memory */
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bfd_vma p_align; /* Segment alignment, file & memory */
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};
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typedef struct elf_internal_phdr Elf_Internal_Phdr;
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#define elf32_internal_phdr elf_internal_phdr
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#define Elf32_Internal_Phdr Elf_Internal_Phdr
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#define elf64_internal_phdr elf_internal_phdr
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#define Elf64_Internal_Phdr Elf_Internal_Phdr
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/* Section header */
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typedef struct elf_internal_shdr {
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unsigned int sh_name; /* Section name, index in string tbl */
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unsigned int sh_type; /* Type of section */
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bfd_vma sh_flags; /* Miscellaneous section attributes */
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bfd_vma sh_addr; /* Section virtual addr at execution */
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bfd_size_type sh_size; /* Size of section in bytes */
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bfd_size_type sh_entsize; /* Entry size if section holds table */
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unsigned long sh_link; /* Index of another section */
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unsigned long sh_info; /* Additional section information */
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file_ptr sh_offset; /* Section file offset */
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unsigned int sh_addralign; /* Section alignment */
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/* The internal rep also has some cached info associated with it. */
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asection * bfd_section; /* Associated BFD section. */
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PTR contents; /* Section contents. */
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} Elf_Internal_Shdr;
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#define elf32_internal_shdr elf_internal_shdr
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#define Elf32_Internal_Shdr Elf_Internal_Shdr
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#define elf64_internal_shdr elf_internal_shdr
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#define Elf64_Internal_Shdr Elf_Internal_Shdr
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/* Symbol table entry */
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struct elf_internal_sym {
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bfd_vma st_value; /* Value of the symbol */
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bfd_vma st_size; /* Associated symbol size */
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unsigned long st_name; /* Symbol name, index in string tbl */
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unsigned char st_info; /* Type and binding attributes */
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unsigned char st_other; /* No defined meaning, 0 */
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unsigned short st_shndx; /* Associated section index */
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};
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typedef struct elf_internal_sym Elf_Internal_Sym;
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#define elf32_internal_sym elf_internal_sym
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#define elf64_internal_sym elf_internal_sym
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#define Elf32_Internal_Sym Elf_Internal_Sym
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#define Elf64_Internal_Sym Elf_Internal_Sym
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/* Note segments */
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typedef struct elf_internal_note {
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unsigned long namesz; /* Size of entry's owner string */
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unsigned long descsz; /* Size of the note descriptor */
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unsigned long type; /* Interpretation of the descriptor */
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char name[1]; /* Start of the name+desc data */
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} Elf_Internal_Note;
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#define Elf32_Internal_Note Elf_Internal_Note
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#define elf32_internal_note elf_internal_note
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/* Relocation Entries */
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typedef struct elf_internal_rel {
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bfd_vma r_offset; /* Location at which to apply the action */
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/* This needs to support 64-bit values in elf64. */
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bfd_vma r_info; /* index and type of relocation */
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} Elf_Internal_Rel;
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#define elf32_internal_rel elf_internal_rel
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#define Elf32_Internal_Rel Elf_Internal_Rel
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#define elf64_internal_rel elf_internal_rel
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#define Elf64_Internal_Rel Elf_Internal_Rel
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typedef struct elf_internal_rela {
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bfd_vma r_offset; /* Location at which to apply the action */
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bfd_vma r_info; /* Index and Type of relocation */
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bfd_signed_vma r_addend; /* Constant addend used to compute value */
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} Elf_Internal_Rela;
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#define elf32_internal_rela elf_internal_rela
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#define elf64_internal_rela elf_internal_rela
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#define Elf32_Internal_Rela Elf_Internal_Rela
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#define Elf64_Internal_Rela Elf_Internal_Rela
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/* dynamic section structure */
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typedef struct elf_internal_dyn {
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/* This needs to support 64-bit values in elf64. */
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bfd_vma d_tag; /* entry tag value */
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union {
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/* This needs to support 64-bit values in elf64. */
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bfd_vma d_val;
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bfd_vma d_ptr;
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} d_un;
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} Elf_Internal_Dyn;
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#define elf32_internal_dyn elf_internal_dyn
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#define elf64_internal_dyn elf_internal_dyn
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#define Elf32_Internal_Dyn Elf_Internal_Dyn
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#define Elf64_Internal_Dyn Elf_Internal_Dyn
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/* This structure is used to describe how sections should be assigned
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to program segments. */
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struct elf_segment_map
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{
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/* Next program segment. */
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struct elf_segment_map *next;
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/* Program segment type. */
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unsigned long p_type;
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/* Program segment flags. */
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unsigned long p_flags;
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/* Program segment physical address. */
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bfd_vma p_paddr;
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/* Whether the p_flags field is valid; if not, the flags are based
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on the section flags. */
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unsigned int p_flags_valid : 1;
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/* Whether the p_paddr field is valid; if not, the physical address
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is based on the section lma values. */
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unsigned int p_paddr_valid : 1;
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/* Number of sections. (Always 0 if p_type == PT_PHDR). */
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unsigned int count;
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/* Sections. Actual number of elements is in count field. */
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asection *sections[1];
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};
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#endif /* _ELF_INTERNAL_H */
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