358 lines
14 KiB
C
358 lines
14 KiB
C
/* BFD ECOFF object file private structure.
|
|
Copyright (C) 1993, 94, 95, 96, 1997 Free Software Foundation, Inc.
|
|
Written by Ian Lance Taylor, 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#include "bfdlink.h"
|
|
|
|
#ifndef ECOFF_H
|
|
#include "coff/ecoff.h"
|
|
#endif
|
|
|
|
/* This is the backend information kept for ECOFF files. This
|
|
structure is constant for a particular backend. The first element
|
|
is the COFF backend data structure, so that ECOFF targets can use
|
|
the generic COFF code. */
|
|
|
|
#define ecoff_backend(abfd) \
|
|
((struct ecoff_backend_data *) (abfd)->xvec->backend_data)
|
|
|
|
struct ecoff_backend_data
|
|
{
|
|
/* COFF backend information. This must be the first field. */
|
|
bfd_coff_backend_data coff;
|
|
/* Supported architecture. */
|
|
enum bfd_architecture arch;
|
|
/* Initial portion of armap string. */
|
|
const char *armap_start;
|
|
/* The page boundary used to align sections in a demand-paged
|
|
executable file. E.g., 0x1000. */
|
|
bfd_vma round;
|
|
/* True if the .rdata section is part of the text segment, as on the
|
|
Alpha. False if .rdata is part of the data segment, as on the
|
|
MIPS. */
|
|
boolean rdata_in_text;
|
|
/* Bitsize of constructor entries. */
|
|
unsigned int constructor_bitsize;
|
|
/* Reloc to use for constructor entries. */
|
|
reloc_howto_type *constructor_reloc;
|
|
/* How to swap debugging information. */
|
|
struct ecoff_debug_swap debug_swap;
|
|
/* External reloc size. */
|
|
bfd_size_type external_reloc_size;
|
|
/* Reloc swapping functions. */
|
|
void (*swap_reloc_in) PARAMS ((bfd *, PTR, struct internal_reloc *));
|
|
void (*swap_reloc_out) PARAMS ((bfd *, const struct internal_reloc *, PTR));
|
|
/* Backend reloc tweaking. */
|
|
void (*adjust_reloc_in) PARAMS ((bfd *, const struct internal_reloc *,
|
|
arelent *));
|
|
void (*adjust_reloc_out) PARAMS ((bfd *, const arelent *,
|
|
struct internal_reloc *));
|
|
/* Relocate section contents while linking. */
|
|
boolean (*relocate_section) PARAMS ((bfd *output_bfd, struct bfd_link_info *,
|
|
bfd *input_bfd, asection *input_section,
|
|
bfd_byte *contents,
|
|
PTR external_relocs));
|
|
/* Do final adjustments to filehdr and aouthdr. */
|
|
boolean (*adjust_headers) PARAMS ((bfd *, struct internal_filehdr *,
|
|
struct internal_aouthdr *));
|
|
/* Read an element from an archive at a given file position. This
|
|
is needed because OSF/1 3.2 uses a weird archive format. */
|
|
bfd *(*get_elt_at_filepos) PARAMS ((bfd *, file_ptr));
|
|
};
|
|
|
|
/* This is the target specific information kept for ECOFF files. */
|
|
|
|
#define ecoff_data(abfd) ((abfd)->tdata.ecoff_obj_data)
|
|
|
|
typedef struct ecoff_tdata
|
|
{
|
|
/* The reloc file position, set by
|
|
ecoff_compute_section_file_positions. */
|
|
file_ptr reloc_filepos;
|
|
|
|
/* The symbol table file position, set by _bfd_ecoff_mkobject_hook. */
|
|
file_ptr sym_filepos;
|
|
|
|
/* The start and end of the text segment. Only valid for an
|
|
existing file, not for one we are creating. */
|
|
unsigned long text_start;
|
|
unsigned long text_end;
|
|
|
|
/* The cached gp value. This is used when relocating. */
|
|
bfd_vma gp;
|
|
|
|
/* The maximum size of objects to optimize using gp. This is
|
|
typically set by the -G option to the compiler, assembler or
|
|
linker. */
|
|
unsigned int gp_size;
|
|
|
|
/* The register masks. When linking, all the masks found in the
|
|
input files are combined into the masks of the output file.
|
|
These are not all used for all targets, but that's OK, because
|
|
the relevant ones are the only ones swapped in and out. */
|
|
unsigned long gprmask;
|
|
unsigned long fprmask;
|
|
unsigned long cprmask[4];
|
|
|
|
/* The ECOFF symbolic debugging information. */
|
|
struct ecoff_debug_info debug_info;
|
|
|
|
/* The unswapped ECOFF symbolic information. */
|
|
PTR raw_syments;
|
|
|
|
/* The canonical BFD symbols. */
|
|
struct ecoff_symbol_struct *canonical_symbols;
|
|
|
|
/* A mapping from external symbol numbers to entries in the linker
|
|
hash table, used when linking. */
|
|
struct ecoff_link_hash_entry **sym_hashes;
|
|
|
|
/* A mapping from reloc symbol indices to sections, used when
|
|
linking. */
|
|
asection **symndx_to_section;
|
|
|
|
/* True if this BFD was written by the backend linker. */
|
|
boolean linker;
|
|
|
|
/* True if a warning that multiple global pointer values are
|
|
needed in the output binary was issued already. */
|
|
boolean issued_multiple_gp_warning;
|
|
|
|
/* Used by find_nearest_line entry point. The structure could be
|
|
included directly in this one, but there's no point to wasting
|
|
the memory just for the infrequently called find_nearest_line. */
|
|
struct ecoff_find_line *find_line_info;
|
|
|
|
/* Whether the .rdata section is in the text segment for this
|
|
particular ECOFF file. This is not valid until
|
|
ecoff_compute_section_file_positions is called. */
|
|
boolean rdata_in_text;
|
|
|
|
} ecoff_data_type;
|
|
|
|
/* Each canonical asymbol really looks like this. */
|
|
|
|
typedef struct ecoff_symbol_struct
|
|
{
|
|
/* The actual symbol which the rest of BFD works with */
|
|
asymbol symbol;
|
|
|
|
/* The fdr for this symbol. */
|
|
FDR *fdr;
|
|
|
|
/* true if this is a local symbol rather than an external one. */
|
|
boolean local;
|
|
|
|
/* A pointer to the unswapped hidden information for this symbol.
|
|
This is either a struct sym_ext or a struct ext_ext, depending on
|
|
the value of the local field above. */
|
|
PTR native;
|
|
} ecoff_symbol_type;
|
|
|
|
/* We take the address of the first element of a asymbol to ensure that the
|
|
macro is only ever applied to an asymbol. */
|
|
#define ecoffsymbol(asymbol) ((ecoff_symbol_type *) (&((asymbol)->the_bfd)))
|
|
|
|
/* We need to save the index of an external symbol when we write it
|
|
out so that can set the symbol index correctly when we write out
|
|
the relocs. */
|
|
#define ecoff_get_sym_index(symbol) ((symbol)->udata.i)
|
|
#define ecoff_set_sym_index(symbol, idx) ((symbol)->udata.i = (idx))
|
|
|
|
/* When generating MIPS embedded PIC code, the linker relaxes the code
|
|
to turn PC relative branches into longer code sequences when the PC
|
|
relative branch is out of range. This involves reading the relocs
|
|
in bfd_relax_section as well as in bfd_final_link, and requires the
|
|
code to keep track of which relocs have been expanded. A pointer
|
|
to this structure is put in the used_by_bfd pointer of a section to
|
|
keep track of this information. The user_by_bfd pointer will be
|
|
NULL if the information was not needed. */
|
|
|
|
struct ecoff_section_tdata
|
|
{
|
|
/* The unswapped relocs for this section. These are stored in
|
|
memory so the input file does not have to be read twice. */
|
|
PTR external_relocs;
|
|
|
|
/* The contents of the section. These bytes may or may not be saved
|
|
in memory, but if it is this is a pointer to them. */
|
|
bfd_byte *contents;
|
|
|
|
/* Offset adjustments for PC relative branches. A number other than
|
|
1 is an addend for a PC relative branch, or a switch table entry
|
|
which is the difference of two .text locations; this addend
|
|
arises because the branch or difference crosses one or more
|
|
branches which were expanded into a larger code sequence. A 1
|
|
means that this branch was itself expanded into a larger code
|
|
sequence. 1 is not a possible offset, since all offsets must be
|
|
multiples of the instruction size, which is 4; also, the only
|
|
relocs with non-zero offsets will be PC relative branches or
|
|
switch table entries within the same object file. If this field
|
|
is NULL, no branches were expanded and no offsets are required.
|
|
Otherwise there are as many entries as there are relocs in the
|
|
section, and the entry for any reloc that is not PC relative is
|
|
zero. */
|
|
long *offsets;
|
|
|
|
/* When producing an executable (i.e., final, non-relocatable link)
|
|
on the Alpha, we may need to use multiple global pointer values
|
|
to span the entire .lita section. In essence, we allow each
|
|
input .lita section to have its own gp value. To support this,
|
|
we need to keep track of the gp values that we picked for each
|
|
input .lita section . */
|
|
bfd_vma gp;
|
|
};
|
|
|
|
/* An accessor macro for the ecoff_section_tdata structure. */
|
|
#define ecoff_section_data(abfd, sec) \
|
|
((struct ecoff_section_tdata *) (sec)->used_by_bfd)
|
|
|
|
/* ECOFF linker hash table entries. */
|
|
|
|
struct ecoff_link_hash_entry
|
|
{
|
|
struct bfd_link_hash_entry root;
|
|
/* Symbol index in output file. */
|
|
long indx;
|
|
/* BFD that ext field value came from. */
|
|
bfd *abfd;
|
|
/* ECOFF external symbol information. */
|
|
EXTR esym;
|
|
/* Nonzero if this symbol has been written out. */
|
|
char written;
|
|
/* Nonzero if this symbol was referred to as small undefined. */
|
|
char small;
|
|
};
|
|
|
|
/* ECOFF linker hash table. */
|
|
|
|
struct ecoff_link_hash_table
|
|
{
|
|
struct bfd_link_hash_table root;
|
|
};
|
|
|
|
/* Make an ECOFF object. */
|
|
extern boolean _bfd_ecoff_mkobject PARAMS ((bfd *));
|
|
|
|
/* Read in the ECOFF symbolic debugging information. */
|
|
extern boolean _bfd_ecoff_slurp_symbolic_info
|
|
PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
|
|
|
|
/* Generic ECOFF BFD backend vectors. */
|
|
|
|
extern boolean _bfd_ecoff_write_object_contents PARAMS ((bfd *abfd));
|
|
extern const bfd_target *_bfd_ecoff_archive_p PARAMS ((bfd *abfd));
|
|
|
|
#define _bfd_ecoff_close_and_cleanup _bfd_generic_close_and_cleanup
|
|
#define _bfd_ecoff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
|
|
extern boolean _bfd_ecoff_new_section_hook
|
|
PARAMS ((bfd *, asection *));
|
|
extern boolean _bfd_ecoff_get_section_contents
|
|
PARAMS ((bfd *, asection *, PTR location, file_ptr, bfd_size_type));
|
|
|
|
#define _bfd_ecoff_bfd_link_split_section _bfd_generic_link_split_section
|
|
|
|
extern boolean _bfd_ecoff_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *));
|
|
#define _bfd_ecoff_bfd_copy_private_section_data \
|
|
_bfd_generic_bfd_copy_private_section_data
|
|
|
|
#define _bfd_ecoff_bfd_copy_private_symbol_data \
|
|
_bfd_generic_bfd_copy_private_symbol_data
|
|
|
|
#define _bfd_ecoff_bfd_print_private_bfd_data \
|
|
_bfd_generic_bfd_print_private_bfd_data
|
|
|
|
#define _bfd_ecoff_bfd_merge_private_bfd_data \
|
|
_bfd_generic_bfd_merge_private_bfd_data
|
|
|
|
#define _bfd_ecoff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
|
|
extern boolean _bfd_ecoff_slurp_armap PARAMS ((bfd *abfd));
|
|
#define _bfd_ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table
|
|
#define _bfd_ecoff_construct_extended_name_table \
|
|
_bfd_archive_bsd_construct_extended_name_table
|
|
#define _bfd_ecoff_truncate_arname bfd_dont_truncate_arname
|
|
extern boolean _bfd_ecoff_write_armap
|
|
PARAMS ((bfd *, unsigned int, struct orl *, unsigned int, int));
|
|
#define _bfd_ecoff_read_ar_hdr _bfd_generic_read_ar_hdr
|
|
#define _bfd_ecoff_openr_next_archived_file \
|
|
bfd_generic_openr_next_archived_file
|
|
#define _bfd_ecoff_get_elt_at_index _bfd_generic_get_elt_at_index
|
|
#define _bfd_ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt
|
|
#define _bfd_ecoff_update_armap_timestamp bfd_true
|
|
|
|
extern long _bfd_ecoff_get_symtab_upper_bound PARAMS ((bfd *abfd));
|
|
extern long _bfd_ecoff_get_symtab PARAMS ((bfd *abfd, asymbol **alocation));
|
|
extern asymbol *_bfd_ecoff_make_empty_symbol PARAMS ((bfd *abfd));
|
|
extern void _bfd_ecoff_print_symbol
|
|
PARAMS ((bfd *, PTR filep, asymbol *, bfd_print_symbol_type));
|
|
extern void _bfd_ecoff_get_symbol_info
|
|
PARAMS ((bfd *, asymbol *, symbol_info *));
|
|
extern boolean _bfd_ecoff_bfd_is_local_label_name
|
|
PARAMS ((bfd *, const char *));
|
|
#define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno
|
|
extern boolean _bfd_ecoff_find_nearest_line
|
|
PARAMS ((bfd *, asection *, asymbol **, bfd_vma offset,
|
|
const char **filename_ptr, const char **fnname_ptr,
|
|
unsigned int *retline_ptr));
|
|
#define _bfd_ecoff_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
|
|
#define _bfd_ecoff_read_minisymbols _bfd_generic_read_minisymbols
|
|
#define _bfd_ecoff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
|
|
|
|
#define _bfd_ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound
|
|
extern long _bfd_ecoff_canonicalize_reloc
|
|
PARAMS ((bfd *, asection *, arelent **, asymbol **symbols));
|
|
/* ecoff_bfd_reloc_type_lookup defined by backend. */
|
|
|
|
extern boolean _bfd_ecoff_set_arch_mach
|
|
PARAMS ((bfd *, enum bfd_architecture, unsigned long machine));
|
|
extern boolean _bfd_ecoff_set_section_contents
|
|
PARAMS ((bfd *, asection *, PTR location, file_ptr, bfd_size_type));
|
|
|
|
extern int _bfd_ecoff_sizeof_headers PARAMS ((bfd *abfd, boolean reloc));
|
|
/* ecoff_bfd_get_relocated_section_contents defined by backend. */
|
|
/* ecoff_bfd_relax_section defined by backend. */
|
|
extern struct bfd_link_hash_table *_bfd_ecoff_bfd_link_hash_table_create
|
|
PARAMS ((bfd *));
|
|
extern boolean _bfd_ecoff_bfd_link_add_symbols
|
|
PARAMS ((bfd *, struct bfd_link_info *));
|
|
extern boolean _bfd_ecoff_bfd_final_link
|
|
PARAMS ((bfd *, struct bfd_link_info *));
|
|
|
|
/* Hook functions for the generic COFF section reading code. */
|
|
|
|
extern PTR _bfd_ecoff_mkobject_hook PARAMS ((bfd *, PTR filehdr, PTR aouthdr));
|
|
#define _bfd_ecoff_set_alignment_hook \
|
|
((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
|
|
extern boolean _bfd_ecoff_set_arch_mach_hook PARAMS ((bfd *abfd, PTR filehdr));
|
|
extern flagword _bfd_ecoff_styp_to_sec_flags
|
|
PARAMS ((bfd *abfd, PTR hdr, const char *name));
|
|
extern boolean _bfd_ecoff_slurp_symbol_table PARAMS ((bfd *abfd));
|
|
|
|
/* ECOFF auxiliary information swapping routines. These are the same
|
|
for all ECOFF targets, so they are defined in ecofflink.c. */
|
|
|
|
extern void _bfd_ecoff_swap_tir_in
|
|
PARAMS ((int, const struct tir_ext *, TIR *));
|
|
extern void _bfd_ecoff_swap_tir_out
|
|
PARAMS ((int, const TIR *, struct tir_ext *));
|
|
extern void _bfd_ecoff_swap_rndx_in
|
|
PARAMS ((int, const struct rndx_ext *, RNDXR *));
|
|
extern void _bfd_ecoff_swap_rndx_out
|
|
PARAMS ((int, const RNDXR *, struct rndx_ext *));
|