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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
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19990502 sourceware importbinu_ss_19990502
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diff --git a/bfd/libecoff.h 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 *));