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256 lines
10 KiB
C
256 lines
10 KiB
C
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/* BFD ECOFF object file private structure.
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Copyright (C) 1993 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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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. ECOFF already
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keeps a bfd_coff_backend_data structure in the bfd_target
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backend_data field, so a pointer to this backend structure is kept
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in the tdata field. */
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#define ecoff_backend(abfd) (ecoff_data (abfd)->backend_data)
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struct ecoff_backend_data
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{
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/* Supported architecture. */
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enum bfd_architecture arch;
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/* Big endian magic number. */
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int big_magic;
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/* Little endian magic number. */
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int little_magic;
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/* Alignment of debugging information. E.g., 4. */
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bfd_size_type debug_align;
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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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/* Bitsize of constructor entries. */
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unsigned int constructor_bitsize;
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/* Sizes of external symbolic information. */
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bfd_size_type external_hdr_size;
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bfd_size_type external_dnr_size;
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bfd_size_type external_pdr_size;
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bfd_size_type external_sym_size;
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bfd_size_type external_opt_size;
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bfd_size_type external_fdr_size;
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bfd_size_type external_rfd_size;
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bfd_size_type external_ext_size;
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/* Functions to swap in external symbolic data. */
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void (*swap_hdr_in) PARAMS ((bfd *, PTR, HDRR *));
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void (*swap_dnr_in) PARAMS ((bfd *, PTR, DNR *));
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void (*swap_pdr_in) PARAMS ((bfd *, PTR, PDR *));
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void (*swap_sym_in) PARAMS ((bfd *, PTR, SYMR *));
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void (*swap_opt_in) PARAMS ((bfd *, PTR, OPTR *));
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void (*swap_fdr_in) PARAMS ((bfd *, PTR, FDR *));
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void (*swap_rfd_in) PARAMS ((bfd *, PTR, RFDT *));
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void (*swap_ext_in) PARAMS ((bfd *, PTR, EXTR *));
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/* Functions to swap out external symbolic data. */
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void (*swap_hdr_out) PARAMS ((bfd *, const HDRR *, PTR));
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void (*swap_dnr_out) PARAMS ((bfd *, const DNR *, PTR));
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void (*swap_pdr_out) PARAMS ((bfd *, const PDR *, PTR));
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void (*swap_sym_out) PARAMS ((bfd *, const SYMR *, PTR));
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void (*swap_opt_out) PARAMS ((bfd *, const OPTR *, PTR));
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void (*swap_fdr_out) PARAMS ((bfd *, const FDR *, PTR));
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void (*swap_rfd_out) PARAMS ((bfd *, const RFDT *, PTR));
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void (*swap_ext_out) PARAMS ((bfd *, const EXTR *, PTR));
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/* It so happens that the auxiliary type information has the same
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type and format for all known ECOFF targets. I don't see any
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reason that that should change, so at least for now the auxiliary
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swapping information is not in this table. */
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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) PARAMS ((bfd *, PTR, struct internal_reloc *));
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void (*swap_reloc_out) PARAMS ((bfd *, const struct internal_reloc *, PTR));
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};
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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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/* Constant backend information. */
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const struct ecoff_backend_data *backend_data;
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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 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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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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unsigned long gprmask;
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unsigned long cprmask[4];
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/* The size of the unswapped ECOFF symbolic information. */
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bfd_size_type raw_size;
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/* The unswapped ECOFF symbolic information. */
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PTR raw_syments;
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/* The swapped ECOFF symbolic header. */
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HDRR symbolic_header;
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/* Pointers to the unswapped symbolic information. */
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unsigned char *line;
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PTR external_dnr; /* struct dnr_ext */
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PTR external_pdr; /* struct pdr_ext */
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PTR external_sym; /* struct sym_ext */
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PTR external_opt; /* struct opt_ext */
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union aux_ext *external_aux;
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char *ss;
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char *ssext;
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PTR external_fdr; /* struct fdr_ext */
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PTR external_rfd; /* struct rfd_ext */
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PTR external_ext; /* struct ext_ext */
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/* The swapped FDR information. */
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FDR *fdr;
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/* The FDR index. This is set for an input BFD to a link so that
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the external symbols can set their FDR index correctly. */
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unsigned int ifdbase;
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/* The canonical BFD symbols. */
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struct ecoff_symbol_struct *canonical_symbols;
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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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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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PTR native;
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} ecoff_symbol_type;
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/* We take the address of the first element of a 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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/* This is a hack borrowed from coffcode.h; we need to save the index
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of an external symbol when we write it out so that can set the
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symbol index correctly when we write out the relocs. */
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#define ecoff_get_sym_index(symbol) ((unsigned long) (symbol)->udata)
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#define ecoff_set_sym_index(symbol, idx) ((symbol)->udata = (PTR) (idx))
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/* Make an empty ECOFF symbol. */
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extern asymbol *ecoff_make_empty_symbol PARAMS ((bfd *abfd));
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/* Read in the ECOFF symbolic debugging information. */
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extern boolean ecoff_slurp_symbolic_info PARAMS ((bfd *));
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/* Generic ECOFF BFD backend vectors. */
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extern unsigned int ecoff_get_symtab_upper_bound PARAMS ((bfd *abfd));
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extern unsigned int ecoff_get_symtab PARAMS ((bfd *abfd,
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asymbol **alocation));
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extern void ecoff_get_symbol_info PARAMS ((bfd *abfd,
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asymbol *symbol,
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symbol_info *ret));
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extern void ecoff_print_symbol PARAMS ((bfd *abfd, PTR filep,
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asymbol *symbol,
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bfd_print_symbol_type how));
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extern unsigned int ecoff_canonicalize_reloc PARAMS ((bfd *abfd,
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asection *section,
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arelent **relptr,
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asymbol **symbols));
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extern CONST struct reloc_howto_struct *ecoff_bfd_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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extern boolean ecoff_find_nearest_line PARAMS ((bfd *abfd,
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asection *section,
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asymbol **symbols,
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bfd_vma offset,
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CONST char **filename_ptr,
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CONST char **fnname_ptr,
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unsigned int *retline_ptr));
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extern boolean ecoff_bfd_seclet_link PARAMS ((bfd *abfd, PTR data,
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boolean relocateable));
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extern boolean ecoff_set_arch_mach PARAMS ((bfd *abfd,
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enum bfd_architecture arch,
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unsigned long machine));
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extern int ecoff_sizeof_headers PARAMS ((bfd *abfd, boolean reloc));
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extern boolean ecoff_set_section_contents PARAMS ((bfd *abfd,
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asection *section,
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PTR location,
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file_ptr offset,
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bfd_size_type count));
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extern boolean ecoff_write_object_contents PARAMS ((bfd *abfd));
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extern boolean ecoff_slurp_armap PARAMS ((bfd *abfd));
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extern boolean ecoff_write_armap PARAMS ((bfd *abfd, unsigned int elength,
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struct orl *map,
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unsigned int orl_count,
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int stridx));
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#define ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table
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extern bfd_target *ecoff_archive_p PARAMS ((bfd *abfd));
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#define ecoff_get_lineno \
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((alent *(*) PARAMS ((bfd *, asymbol *))) bfd_nullvoidptr)
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#define ecoff_truncate_arname bfd_dont_truncate_arname
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#define ecoff_openr_next_archived_file bfd_generic_openr_next_archived_file
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#define ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt
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#define ecoff_get_section_contents bfd_generic_get_section_contents
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#define ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound
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#define ecoff_close_and_cleanup bfd_generic_close_and_cleanup
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#define ecoff_bfd_debug_info_start bfd_void
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#define ecoff_bfd_debug_info_end bfd_void
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#define ecoff_bfd_debug_info_accumulate \
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((void (*) PARAMS ((bfd *, struct sec *))) bfd_void)
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#define ecoff_bfd_get_relocated_section_contents \
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bfd_generic_get_relocated_section_contents
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#define ecoff_bfd_relax_section bfd_generic_relax_section
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#define ecoff_bfd_make_debug_symbol \
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((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
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/* Hook functions for the generic COFF section reading code. */
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extern asection *ecoff_make_section_hook PARAMS ((bfd *abfd, char *name));
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extern boolean ecoff_new_section_hook PARAMS ((bfd *abfd,
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asection *section));
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#define ecoff_set_alignment_hook \
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((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
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extern boolean ecoff_set_arch_mach_hook PARAMS ((bfd *abfd, PTR filehdr));
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extern long ecoff_sec_to_styp_flags PARAMS ((CONST char *name,
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flagword flags));
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extern flagword ecoff_styp_to_sec_flags PARAMS ((bfd *abfd, PTR hdr));
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extern boolean ecoff_slurp_symbol_table PARAMS ((bfd *abfd));
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