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darling-gdb/bfd/mach-o.h
Nick Clifton cd123cb70c Switch sources over to use the GPL version 3
2007-07-03 14:26:43 +00:00

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/* Mach-O support for BFD.
Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007
Free Software Foundation, Inc.
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#ifndef _BFD_MACH_O_H_
#define _BFD_MACH_O_H_
#include "bfd.h"
#define BFD_MACH_O_N_STAB 0xe0 /* If any of these bits set, a symbolic debugging entry. */
#define BFD_MACH_O_N_PEXT 0x10 /* Private external symbol bit. */
#define BFD_MACH_O_N_TYPE 0x0e /* Mask for the type bits. */
#define BFD_MACH_O_N_EXT 0x01 /* External symbol bit, set for external symbols. */
#define BFD_MACH_O_N_UNDF 0x00 /* Undefined, n_sect == NO_SECT. */
#define BFD_MACH_O_N_ABS 0x02 /* Absolute, n_sect == NO_SECT. */
#define BFD_MACH_O_N_SECT 0x0e /* Defined in section number n_sect. */
#define BFD_MACH_O_N_PBUD 0x0c /* Prebound undefined (defined in a dylib). */
#define BFD_MACH_O_N_INDR 0x0a /* Indirect. */
typedef enum bfd_mach_o_ppc_thread_flavour
{
BFD_MACH_O_PPC_THREAD_STATE = 1,
BFD_MACH_O_PPC_FLOAT_STATE = 2,
BFD_MACH_O_PPC_EXCEPTION_STATE = 3,
BFD_MACH_O_PPC_VECTOR_STATE = 4
}
bfd_mach_o_ppc_thread_flavour;
typedef enum bfd_mach_o_i386_thread_flavour
{
BFD_MACH_O_i386_NEW_THREAD_STATE = 1,
BFD_MACH_O_i386_FLOAT_STATE = 2,
BFD_MACH_O_i386_ISA_PORT_MAP_STATE = 3,
BFD_MACH_O_i386_V86_ASSIST_STATE = 4,
BFD_MACH_O_i386_REGS_SEGS_STATE = 5,
BFD_MACH_O_i386_THREAD_SYSCALL_STATE = 6,
BFD_MACH_O_i386_THREAD_STATE_NONE = 7,
BFD_MACH_O_i386_SAVED_STATE = 8,
BFD_MACH_O_i386_THREAD_STATE = -1,
BFD_MACH_O_i386_THREAD_FPSTATE = -2,
BFD_MACH_O_i386_THREAD_EXCEPTSTATE = -3,
BFD_MACH_O_i386_THREAD_CTHREADSTATE = -4,
}
bfd_mach_o_i386_thread_flavour;
#define BFD_MACH_O_LC_REQ_DYLD 0x80000000
typedef enum bfd_mach_o_load_command_type
{
BFD_MACH_O_LC_SEGMENT = 0x1, /* File segment to be mapped. */
BFD_MACH_O_LC_SYMTAB = 0x2, /* Link-edit stab symbol table info (obsolete). */
BFD_MACH_O_LC_SYMSEG = 0x3, /* Link-edit gdb symbol table info. */
BFD_MACH_O_LC_THREAD = 0x4, /* Thread. */
BFD_MACH_O_LC_UNIXTHREAD = 0x5, /* UNIX thread (includes a stack). */
BFD_MACH_O_LC_LOADFVMLIB = 0x6, /* Load a fixed VM shared library. */
BFD_MACH_O_LC_IDFVMLIB = 0x7, /* Fixed VM shared library id. */
BFD_MACH_O_LC_IDENT = 0x8, /* Object identification information (obsolete). */
BFD_MACH_O_LC_FVMFILE = 0x9, /* Fixed VM file inclusion. */
BFD_MACH_O_LC_PREPAGE = 0xa, /* Prepage command (internal use). */
BFD_MACH_O_LC_DYSYMTAB = 0xb, /* Dynamic link-edit symbol table info. */
BFD_MACH_O_LC_LOAD_DYLIB = 0xc, /* Load a dynamically linked shared library. */
BFD_MACH_O_LC_ID_DYLIB = 0xd, /* Dynamically linked shared lib identification. */
BFD_MACH_O_LC_LOAD_DYLINKER = 0xe, /* Load a dynamic linker. */
BFD_MACH_O_LC_ID_DYLINKER = 0xf, /* Dynamic linker identification. */
BFD_MACH_O_LC_PREBOUND_DYLIB = 0x10, /* Modules prebound for a dynamically. */
BFD_MACH_O_LC_ROUTINES = 0x11, /* Image routines. */
BFD_MACH_O_LC_SUB_FRAMEWORK = 0x12, /* Sub framework. */
BFD_MACH_O_LC_SUB_UMBRELLA = 0x13, /* Sub umbrella. */
BFD_MACH_O_LC_SUB_CLIENT = 0x14, /* Sub client. */
BFD_MACH_O_LC_SUB_LIBRARY = 0x15, /* Sub library. */
BFD_MACH_O_LC_TWOLEVEL_HINTS = 0x16, /* Two-level namespace lookup hints. */
BFD_MACH_O_LC_PREBIND_CKSUM = 0x17, /* Prebind checksum. */
/* Load a dynamically linked shared library that is allowed to be
missing (weak). */
BFD_MACH_O_LC_LOAD_WEAK_DYLIB = 0x18
}
bfd_mach_o_load_command_type;
typedef enum bfd_mach_o_cpu_type
{
BFD_MACH_O_CPU_TYPE_VAX = 1,
BFD_MACH_O_CPU_TYPE_MC680x0 = 6,
BFD_MACH_O_CPU_TYPE_I386 = 7,
BFD_MACH_O_CPU_TYPE_MIPS = 8,
BFD_MACH_O_CPU_TYPE_MC98000 = 10,
BFD_MACH_O_CPU_TYPE_HPPA = 11,
BFD_MACH_O_CPU_TYPE_ARM = 12,
BFD_MACH_O_CPU_TYPE_MC88000 = 13,
BFD_MACH_O_CPU_TYPE_SPARC = 14,
BFD_MACH_O_CPU_TYPE_I860 = 15,
BFD_MACH_O_CPU_TYPE_ALPHA = 16,
BFD_MACH_O_CPU_TYPE_POWERPC = 18
}
bfd_mach_o_cpu_type;
typedef enum bfd_mach_o_filetype
{
BFD_MACH_O_MH_OBJECT = 1,
BFD_MACH_O_MH_EXECUTE = 2,
BFD_MACH_O_MH_FVMLIB = 3,
BFD_MACH_O_MH_CORE = 4,
BFD_MACH_O_MH_PRELOAD = 5,
BFD_MACH_O_MH_DYLIB = 6,
BFD_MACH_O_MH_DYLINKER = 7,
BFD_MACH_O_MH_BUNDLE = 8
}
bfd_mach_o_filetype;
/* Constants for the type of a section. */
typedef enum bfd_mach_o_section_type
{
/* Regular section. */
BFD_MACH_O_S_REGULAR = 0x0,
/* Zero fill on demand section. */
BFD_MACH_O_S_ZEROFILL = 0x1,
/* Section with only literal C strings. */
BFD_MACH_O_S_CSTRING_LITERALS = 0x2,
/* Section with only 4 byte literals. */
BFD_MACH_O_S_4BYTE_LITERALS = 0x3,
/* Section with only 8 byte literals. */
BFD_MACH_O_S_8BYTE_LITERALS = 0x4,
/* Section with only pointers to literals. */
BFD_MACH_O_S_LITERAL_POINTERS = 0x5,
/* For the two types of symbol pointers sections and the symbol stubs
section they have indirect symbol table entries. For each of the
entries in the section the indirect symbol table entries, in
corresponding order in the indirect symbol table, start at the index
stored in the reserved1 field of the section structure. Since the
indirect symbol table entries correspond to the entries in the
section the number of indirect symbol table entries is inferred from
the size of the section divided by the size of the entries in the
section. For symbol pointers sections the size of the entries in
the section is 4 bytes and for symbol stubs sections the byte size
of the stubs is stored in the reserved2 field of the section
structure. */
/* Section with only non-lazy symbol pointers. */
BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS = 0x6,
/* Section with only lazy symbol pointers. */
BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7,
/* Section with only symbol stubs, byte size of stub in the reserved2 field. */
BFD_MACH_O_S_SYMBOL_STUBS = 0x8,
/* Section with only function pointers for initialization. */
BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9
}
bfd_mach_o_section_type;
typedef unsigned long bfd_mach_o_cpu_subtype;
typedef struct bfd_mach_o_header
{
unsigned long magic;
unsigned long cputype;
unsigned long cpusubtype;
unsigned long filetype;
unsigned long ncmds;
unsigned long sizeofcmds;
unsigned long flags;
enum bfd_endian byteorder;
}
bfd_mach_o_header;
typedef struct bfd_mach_o_section
{
asection *bfdsection;
char sectname[16 + 1];
char segname[16 + 1];
bfd_vma addr;
bfd_vma size;
bfd_vma offset;
unsigned long align;
bfd_vma reloff;
unsigned long nreloc;
unsigned long flags;
unsigned long reserved1;
unsigned long reserved2;
}
bfd_mach_o_section;
typedef struct bfd_mach_o_segment_command
{
char segname[16];
bfd_vma vmaddr;
bfd_vma vmsize;
bfd_vma fileoff;
unsigned long filesize;
unsigned long nsects;
unsigned long flags;
bfd_mach_o_section *sections;
asection *segment;
}
bfd_mach_o_segment_command;
typedef struct bfd_mach_o_symtab_command
{
unsigned long symoff;
unsigned long nsyms;
unsigned long stroff;
unsigned long strsize;
asymbol *symbols;
char *strtab;
asection *stabs_segment;
asection *stabstr_segment;
}
bfd_mach_o_symtab_command;
/* This is the second set of the symbolic information which is used to support
the data structures for the dynamically link editor.
The original set of symbolic information in the symtab_command which contains
the symbol and string tables must also be present when this load command is
present. When this load command is present the symbol table is organized
into three groups of symbols:
local symbols (static and debugging symbols) - grouped by module
defined external symbols - grouped by module (sorted by name if not lib)
undefined external symbols (sorted by name)
In this load command there are offsets and counts to each of the three groups
of symbols.
This load command contains a the offsets and sizes of the following new
symbolic information tables:
table of contents
module table
reference symbol table
indirect symbol table
The first three tables above (the table of contents, module table and
reference symbol table) are only present if the file is a dynamically linked
shared library. For executable and object modules, which are files
containing only one module, the information that would be in these three
tables is determined as follows:
table of contents - the defined external symbols are sorted by name
module table - the file contains only one module so everything in the
file is part of the module.
reference symbol table - is the defined and undefined external symbols
For dynamically linked shared library files this load command also contains
offsets and sizes to the pool of relocation entries for all sections
separated into two groups:
external relocation entries
local relocation entries
For executable and object modules the relocation entries continue to hang
off the section structures. */
typedef struct bfd_mach_o_dysymtab_command
{
/* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
are grouped into the following three groups:
local symbols (further grouped by the module they are from)
defined external symbols (further grouped by the module they are from)
undefined symbols
The local symbols are used only for debugging. The dynamic binding
process may have to use them to indicate to the debugger the local
symbols for a module that is being bound.
The last two groups are used by the dynamic binding process to do the
binding (indirectly through the module table and the reference symbol
table when this is a dynamically linked shared library file). */
unsigned long ilocalsym; /* Index to local symbols. */
unsigned long nlocalsym; /* Number of local symbols. */
unsigned long iextdefsym; /* Index to externally defined symbols. */
unsigned long nextdefsym; /* Number of externally defined symbols. */
unsigned long iundefsym; /* Index to undefined symbols. */
unsigned long nundefsym; /* Number of undefined symbols. */
/* For the for the dynamic binding process to find which module a symbol
is defined in the table of contents is used (analogous to the ranlib
structure in an archive) which maps defined external symbols to modules
they are defined in. This exists only in a dynamically linked shared
library file. For executable and object modules the defined external
symbols are sorted by name and is use as the table of contents. */
unsigned long tocoff; /* File offset to table of contents. */
unsigned long ntoc; /* Number of entries in table of contents. */
/* To support dynamic binding of "modules" (whole object files) the symbol
table must reflect the modules that the file was created from. This is
done by having a module table that has indexes and counts into the merged
tables for each module. The module structure that these two entries
refer to is described below. This exists only in a dynamically linked
shared library file. For executable and object modules the file only
contains one module so everything in the file belongs to the module. */
unsigned long modtaboff; /* File offset to module table. */
unsigned long nmodtab; /* Number of module table entries. */
/* To support dynamic module binding the module structure for each module
indicates the external references (defined and undefined) each module
makes. For each module there is an offset and a count into the
reference symbol table for the symbols that the module references.
This exists only in a dynamically linked shared library file. For
executable and object modules the defined external symbols and the
undefined external symbols indicates the external references. */
unsigned long extrefsymoff; /* Offset to referenced symbol table. */
unsigned long nextrefsyms; /* Number of referenced symbol table entries. */
/* The sections that contain "symbol pointers" and "routine stubs" have
indexes and (implied counts based on the size of the section and fixed
size of the entry) into the "indirect symbol" table for each pointer
and stub. For every section of these two types the index into the
indirect symbol table is stored in the section header in the field
reserved1. An indirect symbol table entry is simply a 32bit index into
the symbol table to the symbol that the pointer or stub is referring to.
The indirect symbol table is ordered to match the entries in the section. */
unsigned long indirectsymoff; /* File offset to the indirect symbol table. */
unsigned long nindirectsyms; /* Number of indirect symbol table entries. */
/* To support relocating an individual module in a library file quickly the
external relocation entries for each module in the library need to be
accessed efficiently. Since the relocation entries can't be accessed
through the section headers for a library file they are separated into
groups of local and external entries further grouped by module. In this
case the presents of this load command who's extreloff, nextrel,
locreloff and nlocrel fields are non-zero indicates that the relocation
entries of non-merged sections are not referenced through the section
structures (and the reloff and nreloc fields in the section headers are
set to zero).
Since the relocation entries are not accessed through the section headers
this requires the r_address field to be something other than a section
offset to identify the item to be relocated. In this case r_address is
set to the offset from the vmaddr of the first LC_SEGMENT command.
The relocation entries are grouped by module and the module table
entries have indexes and counts into them for the group of external
relocation entries for that the module.
For sections that are merged across modules there must not be any
remaining external relocation entries for them (for merged sections
remaining relocation entries must be local). */
unsigned long extreloff; /* Offset to external relocation entries. */
unsigned long nextrel; /* Number of external relocation entries. */
/* All the local relocation entries are grouped together (they are not
grouped by their module since they are only used if the object is moved
from it statically link edited address). */
unsigned long locreloff; /* Offset to local relocation entries. */
unsigned long nlocrel; /* Number of local relocation entries. */
}
bfd_mach_o_dysymtab_command;
/* An indirect symbol table entry is simply a 32bit index into the symbol table
to the symbol that the pointer or stub is refering to. Unless it is for a
non-lazy symbol pointer section for a defined symbol which strip(1) as
removed. In which case it has the value INDIRECT_SYMBOL_LOCAL. If the
symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that. */
#define INDIRECT_SYMBOL_LOCAL 0x80000000
#define INDIRECT_SYMBOL_ABS 0x40000000
typedef struct bfd_mach_o_thread_flavour
{
unsigned long flavour;
bfd_vma offset;
unsigned long size;
}
bfd_mach_o_thread_flavour;
typedef struct bfd_mach_o_thread_command
{
unsigned long nflavours;
bfd_mach_o_thread_flavour *flavours;
asection *section;
}
bfd_mach_o_thread_command;
typedef struct bfd_mach_o_dylinker_command
{
unsigned long cmd; /* LC_ID_DYLIB or LC_LOAD_DYLIB. */
unsigned long cmdsize; /* Includes pathname string. */
unsigned long name_offset; /* Offset to library's path name. */
unsigned long name_len; /* Offset to library's path name. */
asection *section;
}
bfd_mach_o_dylinker_command;
typedef struct bfd_mach_o_dylib_command
{
unsigned long cmd; /* LC_ID_DYLIB or LC_LOAD_DYLIB. */
unsigned long cmdsize; /* Includes pathname string. */
unsigned long name_offset; /* Offset to library's path name. */
unsigned long name_len; /* Offset to library's path name. */
unsigned long timestamp; /* Library's build time stamp. */
unsigned long current_version; /* Library's current version number. */
unsigned long compatibility_version; /* Library's compatibility vers number. */
asection *section;
}
bfd_mach_o_dylib_command;
typedef struct bfd_mach_o_prebound_dylib_command
{
unsigned long cmd; /* LC_PREBOUND_DYLIB. */
unsigned long cmdsize; /* Includes strings. */
unsigned long name; /* Library's path name. */
unsigned long nmodules; /* Number of modules in library. */
unsigned long linked_modules; /* Bit vector of linked modules. */
asection *section;
}
bfd_mach_o_prebound_dylib_command;
typedef struct bfd_mach_o_load_command
{
bfd_mach_o_load_command_type type;
unsigned int type_required;
bfd_vma offset;
bfd_vma len;
union
{
bfd_mach_o_segment_command segment;
bfd_mach_o_symtab_command symtab;
bfd_mach_o_dysymtab_command dysymtab;
bfd_mach_o_thread_command thread;
bfd_mach_o_dylib_command dylib;
bfd_mach_o_dylinker_command dylinker;
bfd_mach_o_prebound_dylib_command prebound_dylib;
}
command;
}
bfd_mach_o_load_command;
typedef struct mach_o_data_struct
{
bfd_mach_o_header header;
bfd_mach_o_load_command *commands;
unsigned long nsymbols;
asymbol *symbols;
unsigned long nsects;
bfd_mach_o_section **sections;
bfd *ibfd;
}
mach_o_data_struct;
typedef struct mach_o_data_struct bfd_mach_o_data_struct;
bfd_boolean bfd_mach_o_valid (bfd *);
int bfd_mach_o_scan_read_symtab_symbol (bfd *, bfd_mach_o_symtab_command *, asymbol *, unsigned long);
int bfd_mach_o_scan_read_symtab_strtab (bfd *, bfd_mach_o_symtab_command *);
int bfd_mach_o_scan_read_symtab_symbols (bfd *, bfd_mach_o_symtab_command *);
int bfd_mach_o_scan_read_dysymtab_symbol (bfd *, bfd_mach_o_dysymtab_command *, bfd_mach_o_symtab_command *, 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 (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 *);
int bfd_mach_o_lookup_section (bfd *, asection *, bfd_mach_o_load_command **, bfd_mach_o_section **);
int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
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 *);
extern const bfd_target mach_o_be_vec;
extern const bfd_target mach_o_le_vec;
extern const bfd_target mach_o_fat_vec;
#endif /* _BFD_MACH_O_H_ */
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