346 lines
13 KiB
C
346 lines
13 KiB
C
/* BFD ECOFF object file private structure.
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Copyright (C) 1993-2014 Free Software Foundation, Inc.
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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
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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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#include "bfdlink.h"
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#ifndef ECOFF_H
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#include "coff/ecoff.h"
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#endif
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/* This is the backend information kept for ECOFF files. This
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structure is constant for a particular backend. The first element
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is the COFF backend data structure, so that ECOFF targets can use
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the generic COFF code. */
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#define ecoff_backend(abfd) \
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((struct ecoff_backend_data *) (abfd)->xvec->backend_data)
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struct ecoff_backend_data
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{
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/* COFF backend information. This must be the first field. */
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bfd_coff_backend_data coff;
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/* Supported architecture. */
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enum bfd_architecture arch;
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/* Initial portion of armap string. */
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const char *armap_start;
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/* The page boundary used to align sections in a demand-paged
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executable file. E.g., 0x1000. */
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bfd_vma round;
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/* TRUE if the .rdata section is part of the text segment, as on the
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Alpha. FALSE if .rdata is part of the data segment, as on the
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MIPS. */
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bfd_boolean rdata_in_text;
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/* Bitsize of constructor entries. */
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unsigned int constructor_bitsize;
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/* Reloc to use for constructor entries. */
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reloc_howto_type *constructor_reloc;
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/* How to swap debugging information. */
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struct ecoff_debug_swap debug_swap;
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/* External reloc size. */
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bfd_size_type external_reloc_size;
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/* Reloc swapping functions. */
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void (*swap_reloc_in) (bfd *, void *, struct internal_reloc *);
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void (*swap_reloc_out) (bfd *, const struct internal_reloc *, void *);
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/* Backend reloc tweaking. */
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void (*adjust_reloc_in)
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(bfd *, const struct internal_reloc *, arelent *);
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void (*adjust_reloc_out)
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(bfd *, const arelent *, struct internal_reloc *);
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/* Relocate section contents while linking. */
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bfd_boolean (*relocate_section)
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(bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, void *);
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/* Do final adjustments to filehdr and aouthdr. */
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bfd_boolean (*adjust_headers)
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(bfd *, struct internal_filehdr *, struct internal_aouthdr *);
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/* Read an element from an archive at a given file position. This
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is needed because OSF/1 3.2 uses a weird archive format. */
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bfd *(*get_elt_at_filepos) (bfd *, file_ptr);
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};
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/* ECOFF targets don't support COFF long section names, so this
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macro is provided to use as an initialiser for the related
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members of the embedded bfd_coff_backend_data struct. */
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#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
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{
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/* The reloc file position, set by
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ecoff_compute_section_file_positions. */
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file_ptr reloc_filepos;
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/* The symbol table file position, set by _bfd_ecoff_mkobject_hook. */
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file_ptr sym_filepos;
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/* The start and end of the text segment. Only valid for an
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existing file, not for one we are creating. */
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unsigned long text_start;
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unsigned long text_end;
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/* The cached gp value. This is used when relocating. */
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bfd_vma gp;
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/* The maximum size of objects to optimize using gp. This is
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typically set by the -G option to the compiler, assembler or
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linker. */
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unsigned int gp_size;
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/* The register masks. When linking, all the masks found in the
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input files are combined into the masks of the output file.
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These are not all used for all targets, but that's OK, because
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the relevant ones are the only ones swapped in and out. */
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unsigned long gprmask;
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unsigned long fprmask;
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unsigned long cprmask[4];
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/* The ECOFF symbolic debugging information. */
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struct ecoff_debug_info debug_info;
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/* The unswapped ECOFF symbolic information. */
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void * raw_syments;
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/* The canonical BFD symbols. */
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struct ecoff_symbol_struct *canonical_symbols;
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/* A mapping from external symbol numbers to entries in the linker
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hash table, used when linking. */
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struct ecoff_link_hash_entry **sym_hashes;
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/* A mapping from reloc symbol indices to sections, used when
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linking. */
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asection **symndx_to_section;
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/* TRUE if this BFD was written by the backend linker. */
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bfd_boolean linker;
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/* TRUE if a warning that multiple global pointer values are
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needed in the output binary was issued already. */
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bfd_boolean issued_multiple_gp_warning;
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/* Used by find_nearest_line entry point. The structure could be
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included directly in this one, but there's no point to wasting
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the memory just for the infrequently called find_nearest_line. */
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struct ecoff_find_line *find_line_info;
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/* Whether the .rdata section is in the text segment for this
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particular ECOFF file. This is not valid until
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ecoff_compute_section_file_positions is called. */
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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
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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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/* The fdr for this symbol. */
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FDR *fdr;
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/* TRUE if this is a local symbol rather than an external one. */
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bfd_boolean local;
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/* A pointer to the unswapped hidden information for this symbol.
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This is either a struct sym_ext or a struct ext_ext, depending on
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the value of the local field above. */
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void * native;
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} ecoff_symbol_type;
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/* We take the address of the first element of an asymbol to ensure that the
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macro is only ever applied to an asymbol. */
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#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
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out so that can set the symbol index correctly when we write out
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the relocs. */
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#define ecoff_get_sym_index(symbol) ((symbol)->udata.i)
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#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
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a section to keep track of any per-section data.
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The user_by_bfd pointer will be NULL if the information was not
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needed. */
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struct ecoff_section_tdata
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{
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/* When producing an executable (i.e., final, non-relocatable link)
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on the Alpha, we may need to use multiple global pointer values
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to span the entire .lita section. In essence, we allow each
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input .lita section to have its own gp value. To support this,
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we need to keep track of the gp values that we picked for each
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input .lita section . */
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bfd_vma gp;
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};
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/* An accessor macro for the ecoff_section_tdata structure. */
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#define ecoff_section_data(abfd, sec) \
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((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
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{
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struct bfd_link_hash_entry root;
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/* Symbol index in output file. */
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long indx;
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/* BFD that ext field value came from. */
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bfd *abfd;
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/* ECOFF external symbol information. */
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EXTR esym;
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/* Nonzero if this symbol has been written out. */
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char written;
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/* Nonzero if this symbol was referred to as small undefined. */
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char small;
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};
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/* ECOFF linker hash table. */
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struct ecoff_link_hash_table
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{
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struct bfd_link_hash_table root;
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};
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/* Make an ECOFF object. */
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extern bfd_boolean _bfd_ecoff_mkobject (bfd *);
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/* Read in the ECOFF symbolic debugging information. */
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extern bfd_boolean _bfd_ecoff_slurp_symbolic_info
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(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
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#define _bfd_ecoff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
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extern bfd_boolean _bfd_ecoff_new_section_hook
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(bfd *, asection *);
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extern bfd_boolean _bfd_ecoff_get_section_contents
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(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
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(bfd *, bfd *);
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#define _bfd_ecoff_bfd_copy_private_section_data \
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_bfd_generic_bfd_copy_private_section_data
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#define _bfd_ecoff_bfd_copy_private_symbol_data \
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_bfd_generic_bfd_copy_private_symbol_data
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#define _bfd_ecoff_bfd_copy_private_header_data \
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_bfd_generic_bfd_copy_private_header_data
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#define _bfd_ecoff_bfd_print_private_bfd_data \
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_bfd_generic_bfd_print_private_bfd_data
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#define _bfd_ecoff_bfd_merge_private_bfd_data \
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_bfd_generic_bfd_merge_private_bfd_data
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#define _bfd_ecoff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
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extern bfd_boolean _bfd_ecoff_slurp_armap (bfd *);
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#define _bfd_ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table
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#define _bfd_ecoff_construct_extended_name_table \
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_bfd_archive_bsd_construct_extended_name_table
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#define _bfd_ecoff_truncate_arname bfd_dont_truncate_arname
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extern bfd_boolean _bfd_ecoff_write_armap
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(bfd *, unsigned int, struct orl *, unsigned int, int);
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#define _bfd_ecoff_read_ar_hdr _bfd_generic_read_ar_hdr
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#define _bfd_ecoff_write_ar_hdr _bfd_generic_write_ar_hdr
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#define _bfd_ecoff_openr_next_archived_file \
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bfd_generic_openr_next_archived_file
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#define _bfd_ecoff_get_elt_at_index _bfd_generic_get_elt_at_index
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#define _bfd_ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt
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#define _bfd_ecoff_update_armap_timestamp bfd_true
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#define _bfd_ecoff_bfd_is_target_special_symbol \
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((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
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extern long _bfd_ecoff_get_symtab_upper_bound (bfd *);
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extern long _bfd_ecoff_canonicalize_symtab (bfd *, asymbol **);
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extern asymbol *_bfd_ecoff_make_empty_symbol (bfd *);
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extern void _bfd_ecoff_print_symbol
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(bfd *, void *, asymbol *, bfd_print_symbol_type);
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extern void _bfd_ecoff_get_symbol_info
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(bfd *, asymbol *, symbol_info *);
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extern bfd_boolean _bfd_ecoff_bfd_is_local_label_name
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(bfd *, const char *);
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#define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno
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extern bfd_boolean _bfd_ecoff_find_nearest_line
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(bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
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unsigned int *);
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#define _bfd_ecoff_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
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#define _bfd_ecoff_read_minisymbols _bfd_generic_read_minisymbols
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#define _bfd_ecoff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
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#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
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extern long _bfd_ecoff_canonicalize_reloc
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(bfd *, asection *, arelent **, asymbol **symbols);
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/* ecoff_bfd_reloc_type_lookup defined by backend. */
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extern bfd_boolean _bfd_ecoff_set_arch_mach
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(bfd *, enum bfd_architecture, unsigned long);
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extern bfd_boolean _bfd_ecoff_set_section_contents
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(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 *);
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/* ecoff_bfd_get_relocated_section_contents defined by backend. */
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/* ecoff_bfd_relax_section defined by backend. */
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extern struct bfd_link_hash_table *_bfd_ecoff_bfd_link_hash_table_create
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(bfd *);
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#define _bfd_ecoff_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
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extern bfd_boolean _bfd_ecoff_bfd_link_add_symbols
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(bfd *, struct bfd_link_info *);
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#define _bfd_ecoff_bfd_link_just_syms _bfd_generic_link_just_syms
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#define _bfd_ecoff_bfd_copy_link_hash_symbol_type \
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_bfd_generic_copy_link_hash_symbol_type
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extern bfd_boolean _bfd_ecoff_bfd_final_link
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(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 *);
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#define _bfd_ecoff_set_alignment_hook \
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((void (*) (bfd *, asection *, void *)) bfd_void)
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extern bfd_boolean _bfd_ecoff_set_arch_mach_hook
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(bfd *, void *);
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extern bfd_boolean _bfd_ecoff_no_long_sections
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(bfd *abfd, int enable);
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extern bfd_boolean _bfd_ecoff_styp_to_sec_flags
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(bfd *, void *, const char *, asection *, flagword *);
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extern bfd_boolean _bfd_ecoff_slurp_symbol_table (bfd *);
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/* ECOFF auxiliary information swapping routines. These are the same
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for all ECOFF targets, so they are defined in ecofflink.c. */
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extern void _bfd_ecoff_swap_tir_in
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(int, const struct tir_ext *, TIR *);
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extern void _bfd_ecoff_swap_tir_out
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(int, const TIR *, struct tir_ext *);
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extern void _bfd_ecoff_swap_rndx_in
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(int, const struct rndx_ext *, RNDXR *);
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extern void _bfd_ecoff_swap_rndx_out
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(int, const RNDXR *, struct rndx_ext *);
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