/* BFD COFF object file private structure.
Copyright (C) 1990-2014 Free Software Foundation, Inc.
Written by Cygnus Support.
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. */
#include "bfdlink.h"
/* Object file tdata; access macros. */
#define coff_data(bfd) ((bfd)->tdata.coff_obj_data)
#define obj_pe(bfd) (coff_data (bfd)->pe)
#define obj_symbols(bfd) (coff_data (bfd)->symbols)
#define obj_sym_filepos(bfd) (coff_data (bfd)->sym_filepos)
#define obj_relocbase(bfd) (coff_data (bfd)->relocbase)
#define obj_raw_syments(bfd) (coff_data (bfd)->raw_syments)
#define obj_raw_syment_count(bfd) (coff_data (bfd)->raw_syment_count)
#define obj_convert(bfd) (coff_data (bfd)->conversion_table)
#define obj_conv_table_size(bfd) (coff_data (bfd)->conv_table_size)
#define obj_coff_external_syms(bfd) (coff_data (bfd)->external_syms)
#define obj_coff_keep_syms(bfd) (coff_data (bfd)->keep_syms)
#define obj_coff_strings(bfd) (coff_data (bfd)->strings)
#define obj_coff_strings_len(bfd) (coff_data (bfd)->strings_len)
#define obj_coff_keep_strings(bfd) (coff_data (bfd)->keep_strings)
#define obj_coff_sym_hashes(bfd) (coff_data (bfd)->sym_hashes)
#define obj_coff_strings_written(bfd) (coff_data (bfd)->strings_written)
#define obj_coff_local_toc_table(bfd) (coff_data (bfd)->local_toc_sym_map)
/* `Tdata' information kept for COFF files. */
typedef struct coff_tdata
{
struct coff_symbol_struct *symbols; /* Symtab for input bfd. */
unsigned int *conversion_table;
int conv_table_size;
file_ptr sym_filepos;
struct coff_ptr_struct *raw_syments;
unsigned long raw_syment_count;
/* These are only valid once writing has begun. */
unsigned long int relocbase;
/* These members communicate important constants about the symbol table
to GDB's symbol-reading code. These `constants' unfortunately vary
from coff implementation to implementation... */
unsigned local_n_btmask;
unsigned local_n_btshft;
unsigned local_n_tmask;
unsigned local_n_tshift;
unsigned local_symesz;
unsigned local_auxesz;
unsigned local_linesz;
/* The unswapped external symbols. May be NULL. Read by
_bfd_coff_get_external_symbols. */
void * external_syms;
/* If this is TRUE, the external_syms may not be freed. */
bfd_boolean keep_syms;
/* The string table. May be NULL. Read by
_bfd_coff_read_string_table. */
char *strings;
/* The length of the strings table. For error checking. */
bfd_size_type strings_len;
/* If this is TRUE, the strings may not be freed. */
bfd_boolean keep_strings;
/* If this is TRUE, the strings have been written out already. */
bfd_boolean strings_written;
/* Is this a PE format coff file? */
int pe;
/* Used by the COFF backend linker. */
struct coff_link_hash_entry **sym_hashes;
/* Used by the pe linker for PowerPC. */
int *local_toc_sym_map;
struct bfd_link_info *link_info;
/* Used by coff_find_nearest_line. */
void * line_info;
/* A place to stash dwarf2 info for this bfd. */
void * dwarf2_find_line_info;
/* The timestamp from the COFF file header. */
long timestamp;
/* Copy of some of the f_flags bits in the COFF filehdr structure,
used by ARM code. */
flagword flags;
/* coff-stgo32 EXE stub header after BFD tdata has been allocated. Its data
is kept in internal_filehdr.go32stub beforehand. */
char *go32stub;
} coff_data_type;
/* Tdata for pe image files. */
typedef struct pe_tdata
{
coff_data_type coff;
struct internal_extra_pe_aouthdr pe_opthdr;
int dll;
int has_reloc_section;
int dont_strip_reloc;
bfd_boolean insert_timestamp;
bfd_boolean (*in_reloc_p) (bfd *, reloc_howto_type *);
flagword real_flags;
/* Build-id info. */
struct
{
bfd_boolean (*after_write_object_contents) (bfd *);
const char *style;
asection *sec;
} build_id;
} pe_data_type;
#define pe_data(bfd) ((bfd)->tdata.pe_obj_data)
/* Tdata for XCOFF files. */
struct xcoff_tdata
{
/* Basic COFF information. */
coff_data_type coff;
/* TRUE if this is an XCOFF64 file. */
bfd_boolean xcoff64;
/* TRUE if a large a.out header should be generated. */
bfd_boolean full_aouthdr;
/* TOC value. */
bfd_vma toc;
/* Index of section holding TOC. */
int sntoc;
/* Index of section holding entry point. */
int snentry;
/* .text alignment from optional header. */
int text_align_power;
/* .data alignment from optional header. */
int data_align_power;
/* modtype from optional header. */
short modtype;
/* cputype from optional header. */
short cputype;
/* maxdata from optional header. */
bfd_vma maxdata;
/* maxstack from optional header. */
bfd_vma maxstack;
/* Used by the XCOFF backend linker. */
asection **csects;
long *debug_indices;
unsigned int *lineno_counts;
unsigned int import_file_id;
};
#define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
/* We take the address of the first element of an asymbol to ensure that the
macro is only ever applied to an asymbol. */
#define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
/* The used_by_bfd field of a section may be set to a pointer to this
structure. */
struct coff_section_tdata
{
/* The relocs, swapped into COFF internal form. This may be NULL. */
struct internal_reloc *relocs;
/* If this is TRUE, the relocs entry may not be freed. */
bfd_boolean keep_relocs;
/* The section contents. This may be NULL. */
bfd_byte *contents;
/* If this is TRUE, the contents entry may not be freed. */
bfd_boolean keep_contents;
/* Information cached by coff_find_nearest_line. */
bfd_vma offset;
unsigned int i;
const char *function;
/* Optional information about a COMDAT entry; NULL if not COMDAT. */
struct coff_comdat_info *comdat;
int line_base;
/* A pointer used for .stab linking optimizations. */
void * stab_info;
/* Available for individual backends. */
void * tdata;
};
/* An accessor macro for the coff_section_tdata structure. */
#define coff_section_data(abfd, sec) \
((struct coff_section_tdata *) (sec)->used_by_bfd)
/* Tdata for sections in XCOFF files. This is used by the linker. */
struct xcoff_section_tdata
{
/* Used for XCOFF csects created by the linker; points to the real
XCOFF section which contains this csect. */
asection *enclosing;
/* The lineno_count field for the enclosing section, because we are
going to clobber it there. */
unsigned int lineno_count;
/* The first and last symbol indices for symbols used by this csect. */
unsigned long first_symndx;
unsigned long last_symndx;
};
/* An accessor macro the xcoff_section_tdata structure. */
#define xcoff_section_data(abfd, sec) \
((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
/* Tdata for sections in PE files. */
struct pei_section_tdata
{
/* The virtual size of the section. */
bfd_size_type virt_size;
/* The PE section flags. */
long pe_flags;
};
/* An accessor macro for the pei_section_tdata structure. */
#define pei_section_data(abfd, sec) \
((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
/* COFF linker hash table entries. */
struct coff_link_hash_entry
{
struct bfd_link_hash_entry root;
/* Symbol index in output file. Set to -1 initially. Set to -2 if
there is a reloc against this symbol. */
long indx;
/* Symbol type. */
unsigned short type;
/* Symbol class. */
unsigned char symbol_class;
/* Number of auxiliary entries. */
char numaux;
/* BFD to take auxiliary entries from. */
bfd *auxbfd;
/* Pointer to array of auxiliary entries, if any. */
union internal_auxent *aux;
/* Flag word; legal values follow. */
unsigned short coff_link_hash_flags;
/* Symbol is a PE section symbol. */
#define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
};
/* COFF linker hash table. */
struct coff_link_hash_table
{
struct bfd_link_hash_table root;
/* A pointer to information used to link stabs in sections. */
struct stab_info stab_info;
};
/* Look up an entry in a COFF linker hash table. */
#define coff_link_hash_lookup(table, string, create, copy, follow) \
((struct coff_link_hash_entry *) \
bfd_link_hash_lookup (&(table)->root, (string), (create), \
(copy), (follow)))
/* Traverse a COFF linker hash table. */
#define coff_link_hash_traverse(table, func, info) \
(bfd_link_hash_traverse \
(&(table)->root, \
(bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
(info)))
/* Get the COFF linker hash table from a link_info structure. */
#define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
/* Functions in coffgen.c. */
extern const bfd_target *coff_object_p
(bfd *);
extern struct bfd_section *coff_section_from_bfd_index
(bfd *, int);
extern long coff_get_symtab_upper_bound
(bfd *);
extern long coff_canonicalize_symtab
(bfd *, asymbol **);
extern int coff_count_linenumbers
(bfd *);
extern struct coff_symbol_struct *coff_symbol_from
(bfd *, asymbol *);
extern bfd_boolean coff_renumber_symbols
(bfd *, int *);
extern void coff_mangle_symbols
(bfd *);
extern bfd_boolean coff_write_symbols
(bfd *);
extern bfd_boolean coff_write_alien_symbol
(bfd *, asymbol *, struct internal_syment *, bfd_vma *,
bfd_size_type *, asection **, bfd_size_type *);
extern bfd_boolean coff_write_linenumbers
(bfd *);
extern alent *coff_get_lineno
(bfd *, asymbol *);
extern asymbol *coff_section_symbol
(bfd *, char *);
extern bfd_boolean _bfd_coff_get_external_symbols
(bfd *);
extern const char *_bfd_coff_read_string_table
(bfd *);
extern bfd_boolean _bfd_coff_free_symbols
(bfd *);
extern struct coff_ptr_struct *coff_get_normalized_symtab
(bfd *);
extern long coff_get_reloc_upper_bound
(bfd *, sec_ptr);
extern asymbol *coff_make_empty_symbol
(bfd *);
extern void coff_print_symbol
(bfd *, void * filep, asymbol *, bfd_print_symbol_type);
extern void coff_get_symbol_info
(bfd *, asymbol *, symbol_info *ret);
extern bfd_boolean _bfd_coff_is_local_label_name
(bfd *, const char *);
extern asymbol *coff_bfd_make_debug_symbol
(bfd *, void *, unsigned long);
extern bfd_boolean coff_find_nearest_line
(bfd *, asymbol **, asection *, bfd_vma,
const char **, const char **, unsigned int *, unsigned int *);
#define coff_find_line _bfd_nosymbols_find_line
struct dwarf_debug_section;
extern bfd_boolean coff_find_nearest_line_with_names
(bfd *, asymbol **, asection *, bfd_vma, const char **, const char **,
unsigned int *, const struct dwarf_debug_section *);
extern bfd_boolean coff_find_inliner_info
(bfd *, const char **, const char **, unsigned int *);
extern int coff_sizeof_headers
(bfd *, struct bfd_link_info *);
extern bfd_boolean bfd_coff_reloc16_relax_section
(bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
(bfd *, struct bfd_link_info *, struct bfd_link_order *,
bfd_byte *, bfd_boolean, asymbol **);
extern bfd_vma bfd_coff_reloc16_get_value
(arelent *, struct bfd_link_info *, asection *);
extern void bfd_perform_slip
(bfd *, unsigned int, asection *, bfd_vma);
/* Functions and types in cofflink.c. */
#define STRING_SIZE_SIZE 4
/* We use a hash table to merge identical enum, struct, and union
definitions in the linker. */
/* Information we keep for a single element (an enum value, a
structure or union field) in the debug merge hash table. */
struct coff_debug_merge_element
{
/* Next element. */
struct coff_debug_merge_element *next;
/* Name. */
const char *name;
/* Type. */
unsigned int type;
/* Symbol index for complex type. */
long tagndx;
};
/* A linked list of debug merge entries for a given name. */
struct coff_debug_merge_type
{
/* Next type with the same name. */
struct coff_debug_merge_type *next;
/* Class of type. */
int type_class;
/* Symbol index where this type is defined. */
long indx;
/* List of elements. */
struct coff_debug_merge_element *elements;
};
/* Information we store in the debug merge hash table. */
struct coff_debug_merge_hash_entry
{
struct bfd_hash_entry root;
/* A list of types with this name. */
struct coff_debug_merge_type *types;
};
/* The debug merge hash table. */
struct coff_debug_merge_hash_table
{
struct bfd_hash_table root;
};
/* Initialize a COFF debug merge hash table. */
#define coff_debug_merge_hash_table_init(table) \
(bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc, \
sizeof (struct coff_debug_merge_hash_entry)))
/* Free a COFF debug merge hash table. */
#define coff_debug_merge_hash_table_free(table) \
(bfd_hash_table_free (&(table)->root))
/* Look up an entry in a COFF debug merge hash table. */
#define coff_debug_merge_hash_lookup(table, string, create, copy) \
((struct coff_debug_merge_hash_entry *) \
bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
/* Information we keep for each section in the output file when doing
a relocatable link. */
struct coff_link_section_info
{
/* The relocs to be output. */
struct internal_reloc *relocs;
/* For each reloc against a global symbol whose index was not known
when the reloc was handled, the global hash table entry. */
struct coff_link_hash_entry **rel_hashes;
};
/* Information that we pass around while doing the final link step. */
struct coff_final_link_info
{
/* General link information. */
struct bfd_link_info *info;
/* Output BFD. */
bfd *output_bfd;
/* Used to indicate failure in traversal routine. */
bfd_boolean failed;
/* If doing "task linking" set only during the time when we want the
global symbol writer to convert the storage class of defined global
symbols from global to static. */
bfd_boolean global_to_static;
/* Hash table for long symbol names. */
struct bfd_strtab_hash *strtab;
/* When doing a relocatable link, an array of information kept for
each output section, indexed by the target_index field. */
struct coff_link_section_info *section_info;
/* Symbol index of last C_FILE symbol (-1 if none). */
long last_file_index;
/* Contents of last C_FILE symbol. */
struct internal_syment last_file;
/* Symbol index of first aux entry of last .bf symbol with an empty
endndx field (-1 if none). */
long last_bf_index;
/* Contents of last_bf_index aux entry. */
union internal_auxent last_bf;
/* Hash table used to merge debug information. */
struct coff_debug_merge_hash_table debug_merge;
/* Buffer large enough to hold swapped symbols of any input file. */
struct internal_syment *internal_syms;
/* Buffer large enough to hold sections of symbols of any input file. */
asection **sec_ptrs;
/* Buffer large enough to hold output indices of symbols of any
input file. */
long *sym_indices;
/* Buffer large enough to hold output symbols for any input file. */
bfd_byte *outsyms;
/* Buffer large enough to hold external line numbers for any input
section. */
bfd_byte *linenos;
/* Buffer large enough to hold any input section. */
bfd_byte *contents;
/* Buffer large enough to hold external relocs of any input section. */
bfd_byte *external_relocs;
/* Buffer large enough to hold swapped relocs of any input section. */
struct internal_reloc *internal_relocs;
};
/* Most COFF variants have no way to record the alignment of a
section. This struct is used to set a specific alignment based on
the name of the section. */
struct coff_section_alignment_entry
{
/* The section name. */
const char *name;
/* This is either (unsigned int) -1, indicating that the section
name must match exactly, or it is the number of letters which
must match at the start of the name. */
unsigned int comparison_length;
/* These macros may be used to fill in the first two fields in a
structure initialization. */
#define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
#define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
/* Only use this entry if the default section alignment for this
target is at least that much (as a power of two). If this field
is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
unsigned int default_alignment_min;
/* Only use this entry if the default section alignment for this
target is no greater than this (as a power of two). If this
field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
unsigned int default_alignment_max;
#define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
/* The desired alignment for this section (as a power of two). */
unsigned int alignment_power;
};
extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
(struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
extern bfd_boolean _bfd_coff_link_hash_table_init
(struct coff_link_hash_table *, bfd *,
struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
struct bfd_hash_table *,
const char *),
unsigned int);
extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
(bfd *);
extern const char *_bfd_coff_internal_syment_name
(bfd *, const struct internal_syment *, char *);
extern bfd_boolean _bfd_coff_section_already_linked
(bfd *, asection *, struct bfd_link_info *);
extern bfd_boolean _bfd_coff_link_add_symbols
(bfd *, struct bfd_link_info *);
extern bfd_boolean _bfd_coff_final_link
(bfd *, struct bfd_link_info *);
extern struct internal_reloc *_bfd_coff_read_internal_relocs
(bfd *, asection *, bfd_boolean, bfd_byte *, bfd_boolean,
struct internal_reloc *);
extern bfd_boolean _bfd_coff_generic_relocate_section
(bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
struct internal_reloc *, struct internal_syment *, asection **);
extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
(struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
extern bfd_boolean _bfd_coff_write_global_sym
(struct bfd_hash_entry *, void *);
extern bfd_boolean _bfd_coff_write_task_globals
(struct coff_link_hash_entry *, void *);
extern bfd_boolean _bfd_coff_link_input_bfd
(struct coff_final_link_info *, bfd *);
extern bfd_boolean _bfd_coff_reloc_link_order
(bfd *, struct coff_final_link_info *, asection *,
struct bfd_link_order *);
#define coff_get_section_contents_in_window \
_bfd_generic_get_section_contents_in_window
/* Functions in xcofflink.c. */
extern long _bfd_xcoff_get_dynamic_symtab_upper_bound
(bfd *);
extern long _bfd_xcoff_canonicalize_dynamic_symtab
(bfd *, asymbol **);
extern long _bfd_xcoff_get_dynamic_reloc_upper_bound
(bfd *);
extern long _bfd_xcoff_canonicalize_dynamic_reloc
(bfd *, arelent **, asymbol **);
extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
(bfd *);
extern bfd_boolean _bfd_xcoff_bfd_link_add_symbols
(bfd *, struct bfd_link_info *);
extern bfd_boolean _bfd_xcoff_bfd_final_link
(bfd *, struct bfd_link_info *);
extern bfd_boolean _bfd_xcoff_define_common_symbol
(bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *);
extern bfd_boolean _bfd_ppc_xcoff_relocate_section
(bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
struct internal_reloc *, struct internal_syment *, asection **);
/* Functions in coff-ppc.c. FIXME: These are called by pe.em in the
linker, and so should start with bfd and be declared in bfd.h. */
extern bfd_boolean ppc_allocate_toc_section
(struct bfd_link_info *);
extern bfd_boolean ppc_process_before_allocation
(bfd *, struct bfd_link_info *);