19990502 sourceware importbinu_ss_19990502

1 files changed, 357 insertions, 0 deletions

diff --git a/bfd/libecoff.h b/bfd/libecoff.h
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--- /dev/null
+++ b/bfd/libecoff.h
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+/* 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 *));