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/* BFD ECOFF object file private structure. |
Copyright 1993, 1994, 1995, 1996, 1999, 2001, 2002, 2003, 2004, |
2005, 2006, 2007, 2008, 2009, 2010 |
Free Software Foundation, Inc. |
Written by Ian Lance Taylor, Cygnus Support. |
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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 |
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. |
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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. |
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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. */ |
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#include "bfdlink.h" |
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#ifndef ECOFF_H |
#include "coff/ecoff.h" |
#endif |
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/* 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. */ |
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#define ecoff_backend(abfd) \ |
((struct ecoff_backend_data *) (abfd)->xvec->backend_data) |
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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. */ |
bfd_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) (bfd *, void *, struct internal_reloc *); |
void (*swap_reloc_out) (bfd *, const struct internal_reloc *, void *); |
/* Backend reloc tweaking. */ |
void (*adjust_reloc_in) |
(bfd *, const struct internal_reloc *, arelent *); |
void (*adjust_reloc_out) |
(bfd *, const arelent *, struct internal_reloc *); |
/* Relocate section contents while linking. */ |
bfd_boolean (*relocate_section) |
(bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, void *); |
/* Do final adjustments to filehdr and aouthdr. */ |
bfd_boolean (*adjust_headers) |
(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) (bfd *, file_ptr); |
}; |
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/* ECOFF targets don't support COFF long section names, so this |
macro is provided to use as an initialiser for the related |
members of the embedded bfd_coff_backend_data struct. */ |
#define ECOFF_NO_LONG_SECTION_NAMES (FALSE), _bfd_ecoff_no_long_sections |
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/* This is the target specific information kept for ECOFF files. */ |
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#define ecoff_data(abfd) ((abfd)->tdata.ecoff_obj_data) |
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typedef struct ecoff_tdata |
{ |
/* The reloc file position, set by |
ecoff_compute_section_file_positions. */ |
file_ptr reloc_filepos; |
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/* The symbol table file position, set by _bfd_ecoff_mkobject_hook. */ |
file_ptr sym_filepos; |
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/* 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; |
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/* The cached gp value. This is used when relocating. */ |
bfd_vma gp; |
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/* 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; |
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/* 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]; |
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/* The ECOFF symbolic debugging information. */ |
struct ecoff_debug_info debug_info; |
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/* The unswapped ECOFF symbolic information. */ |
void * raw_syments; |
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/* The canonical BFD symbols. */ |
struct ecoff_symbol_struct *canonical_symbols; |
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/* A mapping from external symbol numbers to entries in the linker |
hash table, used when linking. */ |
struct ecoff_link_hash_entry **sym_hashes; |
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/* A mapping from reloc symbol indices to sections, used when |
linking. */ |
asection **symndx_to_section; |
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/* TRUE if this BFD was written by the backend linker. */ |
bfd_boolean linker; |
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/* TRUE if a warning that multiple global pointer values are |
needed in the output binary was issued already. */ |
bfd_boolean issued_multiple_gp_warning; |
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/* 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; |
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/* 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. */ |
bfd_boolean rdata_in_text; |
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} ecoff_data_type; |
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/* Each canonical asymbol really looks like this. */ |
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typedef struct ecoff_symbol_struct |
{ |
/* The actual symbol which the rest of BFD works with */ |
asymbol symbol; |
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/* The fdr for this symbol. */ |
FDR *fdr; |
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/* TRUE if this is a local symbol rather than an external one. */ |
bfd_boolean local; |
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/* 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. */ |
void * native; |
} ecoff_symbol_type; |
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/* We take the address of the first element of an asymbol to ensure that the |
macro is only ever applied to an asymbol. */ |
#define ecoffsymbol(asymbol) ((ecoff_symbol_type *) (&((asymbol)->the_bfd))) |
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/* 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)) |
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/* A pointer to this structure is put in the used_by_bfd pointer of |
a section to keep track of any per-section data. |
The user_by_bfd pointer will be NULL if the information was not |
needed. */ |
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struct ecoff_section_tdata |
{ |
/* 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; |
}; |
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/* An accessor macro for the ecoff_section_tdata structure. */ |
#define ecoff_section_data(abfd, sec) \ |
((struct ecoff_section_tdata *) (sec)->used_by_bfd) |
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/* ECOFF linker hash table entries. */ |
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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; |
}; |
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/* ECOFF linker hash table. */ |
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struct ecoff_link_hash_table |
{ |
struct bfd_link_hash_table root; |
}; |
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/* Make an ECOFF object. */ |
extern bfd_boolean _bfd_ecoff_mkobject (bfd *); |
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/* Read in the ECOFF symbolic debugging information. */ |
extern bfd_boolean _bfd_ecoff_slurp_symbolic_info |
(bfd *, asection *, struct ecoff_debug_info *); |
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/* Generic ECOFF BFD backend vectors. */ |
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extern bfd_boolean _bfd_ecoff_write_object_contents (bfd *); |
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#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 bfd_boolean _bfd_ecoff_new_section_hook |
(bfd *, asection *); |
extern bfd_boolean _bfd_ecoff_get_section_contents |
(bfd *, asection *, void * location, file_ptr, bfd_size_type); |
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#define _bfd_ecoff_bfd_link_split_section _bfd_generic_link_split_section |
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extern bfd_boolean _bfd_ecoff_bfd_copy_private_bfd_data |
(bfd *, bfd *); |
#define _bfd_ecoff_bfd_copy_private_section_data \ |
_bfd_generic_bfd_copy_private_section_data |
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#define _bfd_ecoff_bfd_copy_private_symbol_data \ |
_bfd_generic_bfd_copy_private_symbol_data |
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#define _bfd_ecoff_bfd_copy_private_header_data \ |
_bfd_generic_bfd_copy_private_header_data |
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#define _bfd_ecoff_bfd_print_private_bfd_data \ |
_bfd_generic_bfd_print_private_bfd_data |
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#define _bfd_ecoff_bfd_merge_private_bfd_data \ |
_bfd_generic_bfd_merge_private_bfd_data |
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#define _bfd_ecoff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags |
extern bfd_boolean _bfd_ecoff_slurp_armap (bfd *); |
#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 bfd_boolean _bfd_ecoff_write_armap |
(bfd *, unsigned int, struct orl *, unsigned int, int); |
#define _bfd_ecoff_read_ar_hdr _bfd_generic_read_ar_hdr |
#define _bfd_ecoff_write_ar_hdr _bfd_generic_write_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 |
#define _bfd_ecoff_bfd_is_target_special_symbol \ |
((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) |
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extern long _bfd_ecoff_get_symtab_upper_bound (bfd *); |
extern long _bfd_ecoff_canonicalize_symtab (bfd *, asymbol **); |
extern asymbol *_bfd_ecoff_make_empty_symbol (bfd *); |
extern void _bfd_ecoff_print_symbol |
(bfd *, void *, asymbol *, bfd_print_symbol_type); |
extern void _bfd_ecoff_get_symbol_info |
(bfd *, asymbol *, symbol_info *); |
extern bfd_boolean _bfd_ecoff_bfd_is_local_label_name |
(bfd *, const char *); |
#define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno |
extern bfd_boolean _bfd_ecoff_find_nearest_line |
(bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, |
unsigned int *); |
#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_find_inliner_info _bfd_nosymbols_find_inliner_info |
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#define _bfd_ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound |
extern long _bfd_ecoff_canonicalize_reloc |
(bfd *, asection *, arelent **, asymbol **symbols); |
/* ecoff_bfd_reloc_type_lookup defined by backend. */ |
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extern bfd_boolean _bfd_ecoff_set_arch_mach |
(bfd *, enum bfd_architecture, unsigned long); |
extern bfd_boolean _bfd_ecoff_set_section_contents |
(bfd *, asection *, const void * location, file_ptr, bfd_size_type); |
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extern int _bfd_ecoff_sizeof_headers (bfd *, struct bfd_link_info *); |
/* 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 |
(bfd *); |
#define _bfd_ecoff_bfd_link_hash_table_free _bfd_generic_link_hash_table_free |
extern bfd_boolean _bfd_ecoff_bfd_link_add_symbols |
(bfd *, struct bfd_link_info *); |
#define _bfd_ecoff_bfd_link_just_syms _bfd_generic_link_just_syms |
#define _bfd_ecoff_bfd_copy_link_hash_symbol_type \ |
_bfd_generic_copy_link_hash_symbol_type |
extern bfd_boolean _bfd_ecoff_bfd_final_link |
(bfd *, struct bfd_link_info *); |
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/* Hook functions for the generic COFF section reading code. */ |
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extern void * _bfd_ecoff_mkobject_hook (bfd *, void *, void *); |
#define _bfd_ecoff_set_alignment_hook \ |
((void (*) (bfd *, asection *, void *)) bfd_void) |
extern bfd_boolean _bfd_ecoff_set_arch_mach_hook |
(bfd *, void *); |
extern bfd_boolean _bfd_ecoff_no_long_sections |
(bfd *abfd, int enable); |
extern bfd_boolean _bfd_ecoff_styp_to_sec_flags |
(bfd *, void *, const char *, asection *, flagword *); |
extern bfd_boolean _bfd_ecoff_slurp_symbol_table (bfd *); |
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/* ECOFF auxiliary information swapping routines. These are the same |
for all ECOFF targets, so they are defined in ecofflink.c. */ |
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extern void _bfd_ecoff_swap_tir_in |
(int, const struct tir_ext *, TIR *); |
extern void _bfd_ecoff_swap_tir_out |
(int, const TIR *, struct tir_ext *); |
extern void _bfd_ecoff_swap_rndx_in |
(int, const struct rndx_ext *, RNDXR *); |
extern void _bfd_ecoff_swap_rndx_out |
(int, const RNDXR *, struct rndx_ext *); |