f1bde64c90
* mach-o.h (BFD_MACH_O_SEGNAME_SIZE): New macro. (BFD_MACH_O_SECTNAME_SIZE): Ditto. (bfd_mach_o_section): Use them. Add next field. (bfd_mach_o_segment_command): Replace sections array by sect_head and sect_tail. (bfd_mach_o_get_mach_o_section): New macro. (bfd_mach_o_lookup_section): Remove. (bfd_mach_o_new_section_hook): New function. * mach-o.c (bfd_mach_o_normalize_section_name): Use strncmp instead of strcmp. (bfd_mach_o_convert_section_name_to_bfd): Replaces section parameter with segname and sectname parameters. Adjust. (bfd_mach_o_append_section_to_segment): New function. Use a linked list for Mach-O sections. (bfd_mach_o_write_segment_32): Adjust. (bfd_mach_o_write_segment_64): Ditto. (bfd_mach_o_build_commands): Fix comment. Adjust. (bfd_mach_o_flatten_sections): Adjust. (bfd_mach_o_print_section_map): Adjust. (bfd_mach_o_set_section_flags_from_bfd): Ditto. (bfd_mach_o_new_section_hook): New function. (bfd_mach_o_init_section_from_mach_o): Ditto. (bfd_mach_o_read_section_32): Remove section parameter. Return a section instead. (bfd_mach_o_read_section_64): Ditto. (bfd_mach_o_read_section): Ditto. (bfd_mach_o_make_bfd_section): Adjust. (bfd_mach_o_read_segment): Adjust for new profile of bfd_mach_o_read_section. (bfd_mach_o_lookup_section): Remove. * mach-o-target.c (bfd_mach_o_new_section_hook): Remove.
594 lines
22 KiB
C
594 lines
22 KiB
C
/* Mach-O support for BFD.
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Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008, 2009
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Free Software Foundation, Inc.
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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 3 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., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#ifndef _BFD_MACH_O_H_
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#define _BFD_MACH_O_H_
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#include "bfd.h"
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#include "mach-o/loader.h"
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typedef struct bfd_mach_o_header
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{
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unsigned long magic;
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unsigned long cputype;
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unsigned long cpusubtype;
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unsigned long filetype;
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unsigned long ncmds;
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unsigned long sizeofcmds;
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unsigned long flags;
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unsigned int reserved;
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/* Version 1: 32 bits, version 2: 64 bits. */
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unsigned int version;
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enum bfd_endian byteorder;
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}
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bfd_mach_o_header;
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#define BFD_MACH_O_SEGNAME_SIZE 16
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#define BFD_MACH_O_SECTNAME_SIZE 16
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typedef struct bfd_mach_o_section
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{
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/* Fields present in the file. */
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char sectname[BFD_MACH_O_SECTNAME_SIZE + 1]; /* Always NUL padded. */
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char segname[BFD_MACH_O_SEGNAME_SIZE + 1];
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bfd_vma addr;
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bfd_vma size;
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bfd_vma offset;
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unsigned long align;
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bfd_vma reloff;
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unsigned long nreloc;
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unsigned long flags;
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unsigned long reserved1;
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unsigned long reserved2;
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unsigned long reserved3;
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/* Corresponding bfd section. */
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asection *bfdsection;
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/* Simply linked list. */
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struct bfd_mach_o_section *next;
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}
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bfd_mach_o_section;
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typedef struct bfd_mach_o_segment_command
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{
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char segname[16 + 1];
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bfd_vma vmaddr;
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bfd_vma vmsize;
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bfd_vma fileoff;
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unsigned long filesize;
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unsigned long maxprot; /* Maximum permitted protection. */
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unsigned long initprot; /* Initial protection. */
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unsigned long nsects;
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unsigned long flags;
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/* Linked list of sections. */
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bfd_mach_o_section *sect_head;
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bfd_mach_o_section *sect_tail;
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}
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bfd_mach_o_segment_command;
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/* Protection flags. */
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#define BFD_MACH_O_PROT_READ 0x01
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#define BFD_MACH_O_PROT_WRITE 0x02
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#define BFD_MACH_O_PROT_EXECUTE 0x04
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/* Expanded internal representation of a relocation entry. */
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typedef struct bfd_mach_o_reloc_info
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{
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bfd_vma r_address;
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bfd_vma r_value;
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unsigned int r_scattered : 1;
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unsigned int r_type : 4;
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unsigned int r_pcrel : 1;
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unsigned int r_length : 2;
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unsigned int r_extern : 1;
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}
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bfd_mach_o_reloc_info;
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typedef struct bfd_mach_o_asymbol
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{
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/* The actual symbol which the rest of BFD works with. */
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asymbol symbol;
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/* Fields from Mach-O symbol. */
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unsigned char n_type;
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unsigned char n_sect;
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unsigned short n_desc;
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}
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bfd_mach_o_asymbol;
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typedef struct bfd_mach_o_symtab_command
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{
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unsigned int symoff;
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unsigned int nsyms;
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unsigned int stroff;
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unsigned int strsize;
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bfd_mach_o_asymbol *symbols;
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char *strtab;
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}
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bfd_mach_o_symtab_command;
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/* This is the second set of the symbolic information which is used to support
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the data structures for the dynamically link editor.
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The original set of symbolic information in the symtab_command which contains
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the symbol and string tables must also be present when this load command is
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present. When this load command is present the symbol table is organized
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into three groups of symbols:
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local symbols (static and debugging symbols) - grouped by module
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defined external symbols - grouped by module (sorted by name if not lib)
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undefined external symbols (sorted by name)
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In this load command there are offsets and counts to each of the three groups
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of symbols.
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This load command contains a the offsets and sizes of the following new
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symbolic information tables:
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table of contents
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module table
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reference symbol table
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indirect symbol table
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The first three tables above (the table of contents, module table and
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reference symbol table) are only present if the file is a dynamically linked
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shared library. For executable and object modules, which are files
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containing only one module, the information that would be in these three
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tables is determined as follows:
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table of contents - the defined external symbols are sorted by name
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module table - the file contains only one module so everything in the
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file is part of the module.
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reference symbol table - is the defined and undefined external symbols
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For dynamically linked shared library files this load command also contains
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offsets and sizes to the pool of relocation entries for all sections
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separated into two groups:
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external relocation entries
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local relocation entries
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For executable and object modules the relocation entries continue to hang
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off the section structures. */
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typedef struct bfd_mach_o_dylib_module
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{
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/* Index into the string table indicating the name of the module. */
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unsigned long module_name_idx;
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char *module_name;
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/* Index into the symbol table of the first defined external symbol provided
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by the module. */
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unsigned long iextdefsym;
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/* Number of external symbols provided by this module. */
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unsigned long nextdefsym;
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/* Index into the external reference table of the first entry
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provided by this module. */
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unsigned long irefsym;
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/* Number of external reference entries provided by this module. */
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unsigned long nrefsym;
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/* Index into the symbol table of the first local symbol provided by this
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module. */
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unsigned long ilocalsym;
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/* Number of local symbols provided by this module. */
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unsigned long nlocalsym;
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/* Index into the external relocation table of the first entry provided
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by this module. */
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unsigned long iextrel;
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/* Number of external relocation entries provided by this module. */
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unsigned long nextrel;
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/* Index in the module initialization section to the pointers for this
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module. */
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unsigned short iinit;
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/* Index in the module termination section to the pointers for this
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module. */
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unsigned short iterm;
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/* Number of pointers in the module initialization for this module. */
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unsigned short ninit;
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/* Number of pointers in the module termination for this module. */
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unsigned short nterm;
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/* Number of data byte for this module that are used in the __module_info
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section of the __OBJC segment. */
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unsigned long objc_module_info_size;
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/* Statically linked address of the start of the data for this module
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in the __module_info section of the __OBJC_segment. */
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bfd_vma objc_module_info_addr;
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}
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bfd_mach_o_dylib_module;
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typedef struct bfd_mach_o_dylib_table_of_content
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{
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/* Index into the symbol table to the defined external symbol. */
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unsigned long symbol_index;
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/* Index into the module table to the module for this entry. */
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unsigned long module_index;
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}
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bfd_mach_o_dylib_table_of_content;
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typedef struct bfd_mach_o_dylib_reference
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{
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/* Index into the symbol table for the symbol being referenced. */
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unsigned long isym;
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/* Type of the reference being made (use REFERENCE_FLAGS constants). */
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unsigned long flags;
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}
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bfd_mach_o_dylib_reference;
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#define BFD_MACH_O_REFERENCE_SIZE 4
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typedef struct bfd_mach_o_dysymtab_command
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{
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/* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
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are grouped into the following three groups:
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local symbols (further grouped by the module they are from)
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defined external symbols (further grouped by the module they are from)
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undefined symbols
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The local symbols are used only for debugging. The dynamic binding
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process may have to use them to indicate to the debugger the local
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symbols for a module that is being bound.
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The last two groups are used by the dynamic binding process to do the
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binding (indirectly through the module table and the reference symbol
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table when this is a dynamically linked shared library file). */
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unsigned long ilocalsym; /* Index to local symbols. */
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unsigned long nlocalsym; /* Number of local symbols. */
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unsigned long iextdefsym; /* Index to externally defined symbols. */
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unsigned long nextdefsym; /* Number of externally defined symbols. */
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unsigned long iundefsym; /* Index to undefined symbols. */
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unsigned long nundefsym; /* Number of undefined symbols. */
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/* For the for the dynamic binding process to find which module a symbol
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is defined in the table of contents is used (analogous to the ranlib
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structure in an archive) which maps defined external symbols to modules
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they are defined in. This exists only in a dynamically linked shared
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library file. For executable and object modules the defined external
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symbols are sorted by name and is use as the table of contents. */
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unsigned long tocoff; /* File offset to table of contents. */
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unsigned long ntoc; /* Number of entries in table of contents. */
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/* To support dynamic binding of "modules" (whole object files) the symbol
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table must reflect the modules that the file was created from. This is
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done by having a module table that has indexes and counts into the merged
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tables for each module. The module structure that these two entries
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refer to is described below. This exists only in a dynamically linked
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shared library file. For executable and object modules the file only
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contains one module so everything in the file belongs to the module. */
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unsigned long modtaboff; /* File offset to module table. */
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unsigned long nmodtab; /* Number of module table entries. */
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/* To support dynamic module binding the module structure for each module
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indicates the external references (defined and undefined) each module
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makes. For each module there is an offset and a count into the
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reference symbol table for the symbols that the module references.
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This exists only in a dynamically linked shared library file. For
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executable and object modules the defined external symbols and the
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undefined external symbols indicates the external references. */
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unsigned long extrefsymoff; /* Offset to referenced symbol table. */
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unsigned long nextrefsyms; /* Number of referenced symbol table entries. */
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/* The sections that contain "symbol pointers" and "routine stubs" have
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indexes and (implied counts based on the size of the section and fixed
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size of the entry) into the "indirect symbol" table for each pointer
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and stub. For every section of these two types the index into the
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indirect symbol table is stored in the section header in the field
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reserved1. An indirect symbol table entry is simply a 32bit index into
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the symbol table to the symbol that the pointer or stub is referring to.
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The indirect symbol table is ordered to match the entries in the section. */
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unsigned long indirectsymoff; /* File offset to the indirect symbol table. */
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unsigned long nindirectsyms; /* Number of indirect symbol table entries. */
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/* To support relocating an individual module in a library file quickly the
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external relocation entries for each module in the library need to be
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accessed efficiently. Since the relocation entries can't be accessed
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through the section headers for a library file they are separated into
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groups of local and external entries further grouped by module. In this
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case the presents of this load command who's extreloff, nextrel,
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locreloff and nlocrel fields are non-zero indicates that the relocation
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entries of non-merged sections are not referenced through the section
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structures (and the reloff and nreloc fields in the section headers are
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set to zero).
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Since the relocation entries are not accessed through the section headers
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this requires the r_address field to be something other than a section
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offset to identify the item to be relocated. In this case r_address is
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set to the offset from the vmaddr of the first LC_SEGMENT command.
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The relocation entries are grouped by module and the module table
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entries have indexes and counts into them for the group of external
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relocation entries for that the module.
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For sections that are merged across modules there must not be any
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remaining external relocation entries for them (for merged sections
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remaining relocation entries must be local). */
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unsigned long extreloff; /* Offset to external relocation entries. */
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unsigned long nextrel; /* Number of external relocation entries. */
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/* All the local relocation entries are grouped together (they are not
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grouped by their module since they are only used if the object is moved
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from it statically link edited address). */
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unsigned long locreloff; /* Offset to local relocation entries. */
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unsigned long nlocrel; /* Number of local relocation entries. */
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bfd_mach_o_dylib_module *dylib_module;
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bfd_mach_o_dylib_table_of_content *dylib_toc;
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unsigned int *indirect_syms;
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bfd_mach_o_dylib_reference *ext_refs;
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}
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bfd_mach_o_dysymtab_command;
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/* An indirect symbol table entry is simply a 32bit index into the symbol table
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to the symbol that the pointer or stub is refering to. Unless it is for a
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non-lazy symbol pointer section for a defined symbol which strip(1) has
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removed. In which case it has the value INDIRECT_SYMBOL_LOCAL. If the
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symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that. */
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#define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
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#define BFD_MACH_O_INDIRECT_SYMBOL_ABS 0x40000000
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#define BFD_MACH_O_INDIRECT_SYMBOL_SIZE 4
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/* For LC_THREAD or LC_UNIXTHREAD. */
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typedef struct bfd_mach_o_thread_flavour
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{
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unsigned long flavour;
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unsigned long offset;
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unsigned long size;
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}
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bfd_mach_o_thread_flavour;
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typedef struct bfd_mach_o_thread_command
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{
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unsigned long nflavours;
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bfd_mach_o_thread_flavour *flavours;
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asection *section;
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}
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bfd_mach_o_thread_command;
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/* For LC_LOAD_DYLINKER and LC_ID_DYLINKER. */
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typedef struct bfd_mach_o_dylinker_command
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{
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unsigned long name_offset; /* Offset to library's path name. */
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unsigned long name_len; /* Offset to library's path name. */
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char *name_str;
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}
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bfd_mach_o_dylinker_command;
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/* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
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or LC_REEXPORT_DYLIB. */
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typedef struct bfd_mach_o_dylib_command
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{
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unsigned long name_offset; /* Offset to library's path name. */
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unsigned long name_len; /* Offset to library's path name. */
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unsigned long timestamp; /* Library's build time stamp. */
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unsigned long current_version; /* Library's current version number. */
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unsigned long compatibility_version; /* Library's compatibility vers number. */
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char *name_str;
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}
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bfd_mach_o_dylib_command;
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/* For LC_PREBOUND_DYLIB. */
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typedef struct bfd_mach_o_prebound_dylib_command
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{
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unsigned long name; /* Library's path name. */
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unsigned long nmodules; /* Number of modules in library. */
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unsigned long linked_modules; /* Bit vector of linked modules. */
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}
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bfd_mach_o_prebound_dylib_command;
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/* For LC_UUID. */
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typedef struct bfd_mach_o_uuid_command
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{
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unsigned char uuid[16];
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}
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bfd_mach_o_uuid_command;
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/* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO. */
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typedef struct bfd_mach_o_linkedit_command
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{
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unsigned long dataoff;
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unsigned long datasize;
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}
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bfd_mach_o_linkedit_command;
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typedef struct bfd_mach_o_str_command
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{
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unsigned long stroff;
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unsigned long str_len;
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char *str;
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}
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bfd_mach_o_str_command;
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typedef struct bfd_mach_o_dyld_info_command
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{
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/* File offset and size to rebase info. */
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unsigned int rebase_off;
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unsigned int rebase_size;
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/* File offset and size of binding info. */
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unsigned int bind_off;
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unsigned int bind_size;
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/* File offset and size of weak binding info. */
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unsigned int weak_bind_off;
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unsigned int weak_bind_size;
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/* File offset and size of lazy binding info. */
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unsigned int lazy_bind_off;
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unsigned int lazy_bind_size;
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/* File offset and size of export info. */
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unsigned int export_off;
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unsigned int export_size;
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}
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bfd_mach_o_dyld_info_command;
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typedef struct bfd_mach_o_version_min_command
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{
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unsigned char rel;
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unsigned char maj;
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unsigned char min;
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unsigned int reserved;
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}
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bfd_mach_o_version_min_command;
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typedef struct bfd_mach_o_load_command
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{
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bfd_mach_o_load_command_type type;
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bfd_boolean type_required;
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unsigned int offset;
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unsigned int len;
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union
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{
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bfd_mach_o_segment_command segment;
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bfd_mach_o_symtab_command symtab;
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bfd_mach_o_dysymtab_command dysymtab;
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|
bfd_mach_o_thread_command thread;
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|
bfd_mach_o_dylib_command dylib;
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|
bfd_mach_o_dylinker_command dylinker;
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|
bfd_mach_o_prebound_dylib_command prebound_dylib;
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|
bfd_mach_o_uuid_command uuid;
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|
bfd_mach_o_linkedit_command linkedit;
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|
bfd_mach_o_str_command str;
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|
bfd_mach_o_dyld_info_command dyld_info;
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|
bfd_mach_o_version_min_command version_min;
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|
}
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|
command;
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|
}
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|
bfd_mach_o_load_command;
|
|
|
|
typedef struct mach_o_data_struct
|
|
{
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|
/* Mach-O header. */
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|
bfd_mach_o_header header;
|
|
/* Array of load commands (length is given by header.ncmds). */
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|
bfd_mach_o_load_command *commands;
|
|
|
|
/* Flatten array of sections. The array is 0-based. */
|
|
unsigned long nsects;
|
|
bfd_mach_o_section **sections;
|
|
|
|
/* Used while writting: current length of the output file. This is used
|
|
to allocate space in the file. */
|
|
ufile_ptr filelen;
|
|
|
|
/* As symtab is referenced by other load command, it is handy to have
|
|
a direct access to it. Although it is not clearly stated, only one symtab
|
|
is expected. */
|
|
bfd_mach_o_symtab_command *symtab;
|
|
bfd_mach_o_dysymtab_command *dysymtab;
|
|
}
|
|
bfd_mach_o_data_struct;
|
|
|
|
/* Target specific routines. */
|
|
typedef struct bfd_mach_o_backend_data
|
|
{
|
|
enum bfd_architecture arch;
|
|
bfd_boolean (*_bfd_mach_o_swap_reloc_in)(arelent *, bfd_mach_o_reloc_info *);
|
|
bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
|
|
bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
|
|
void *, char *);
|
|
}
|
|
bfd_mach_o_backend_data;
|
|
|
|
#define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
|
|
#define bfd_mach_o_get_backend_data(abfd) \
|
|
((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
|
|
|
|
/* Get the Mach-O header for section SEC. */
|
|
#define bfd_mach_o_get_mach_o_section(sec) \
|
|
((bfd_mach_o_section *)(sec)->used_by_bfd)
|
|
|
|
bfd_boolean bfd_mach_o_valid (bfd *);
|
|
int bfd_mach_o_read_dysymtab_symbol (bfd *, bfd_mach_o_dysymtab_command *, bfd_mach_o_symtab_command *, bfd_mach_o_asymbol *, unsigned long);
|
|
int bfd_mach_o_scan_start_address (bfd *);
|
|
int bfd_mach_o_scan (bfd *, bfd_mach_o_header *, bfd_mach_o_data_struct *);
|
|
bfd_boolean bfd_mach_o_mkobject_init (bfd *);
|
|
const bfd_target *bfd_mach_o_object_p (bfd *);
|
|
const bfd_target *bfd_mach_o_core_p (bfd *);
|
|
const bfd_target *bfd_mach_o_archive_p (bfd *);
|
|
bfd *bfd_mach_o_openr_next_archived_file (bfd *, bfd *);
|
|
bfd_boolean bfd_mach_o_set_arch_mach (bfd *, enum bfd_architecture,
|
|
unsigned long);
|
|
int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
|
|
bfd_boolean bfd_mach_o_new_section_hook (bfd *, asection *);
|
|
bfd_boolean bfd_mach_o_write_contents (bfd *);
|
|
bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *,
|
|
bfd *, asymbol *);
|
|
bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
|
|
bfd *, asection *);
|
|
bfd_boolean bfd_mach_o_bfd_copy_private_bfd_data (bfd *, bfd *);
|
|
long bfd_mach_o_get_symtab_upper_bound (bfd *);
|
|
long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
|
|
long bfd_mach_o_get_synthetic_symtab (bfd *, long, asymbol **, long,
|
|
asymbol **, asymbol **ret);
|
|
long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *);
|
|
long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **);
|
|
long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *);
|
|
long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **);
|
|
asymbol *bfd_mach_o_make_empty_symbol (bfd *);
|
|
void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
|
|
void bfd_mach_o_print_symbol (bfd *, PTR, asymbol *, bfd_print_symbol_type);
|
|
bfd_boolean bfd_mach_o_bfd_print_private_bfd_data (bfd *, PTR);
|
|
int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *);
|
|
unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type);
|
|
int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *);
|
|
char *bfd_mach_o_core_file_failing_command (bfd *);
|
|
int bfd_mach_o_core_file_failing_signal (bfd *);
|
|
bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *);
|
|
bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *);
|
|
const bfd_target *bfd_mach_o_header_p (bfd *, bfd_mach_o_filetype,
|
|
bfd_mach_o_cpu_type);
|
|
bfd_boolean bfd_mach_o_build_commands (bfd *);
|
|
bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
|
|
file_ptr, bfd_size_type);
|
|
unsigned int bfd_mach_o_version (bfd *);
|
|
|
|
unsigned int bfd_mach_o_get_section_type_from_name (const char *);
|
|
unsigned int bfd_mach_o_get_section_attribute_from_name (const char *);
|
|
void bfd_mach_o_normalize_section_name (const char *, const char *,
|
|
const char **, flagword *);
|
|
|
|
extern const bfd_target mach_o_fat_vec;
|
|
|
|
#endif /* _BFD_MACH_O_H_ */
|