/* BFD ECOFF object file private structure.
- Copyright (C) 1993 Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995, 1996, 1999, 2001, 2002
+ Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+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. ECOFF already
- keeps a bfd_coff_backend_data structure in the bfd_target
- backend_data field, so a pointer to this backend structure is kept
- in the tdata field. */
+ 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) (ecoff_data (abfd)->backend_data)
+#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;
- /* Big endian magic number. */
- int big_magic;
- /* Little endian magic number. */
- int little_magic;
- /* Alignment of debugging information. E.g., 4. */
- bfd_size_type debug_align;
+ /* 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;
- /* Sizes of external symbolic information. */
- bfd_size_type external_hdr_size;
- bfd_size_type external_dnr_size;
- bfd_size_type external_pdr_size;
- bfd_size_type external_sym_size;
- bfd_size_type external_opt_size;
- bfd_size_type external_fdr_size;
- bfd_size_type external_rfd_size;
- bfd_size_type external_ext_size;
- /* Functions to swap in external symbolic data. */
- void (*swap_hdr_in) PARAMS ((bfd *, PTR, HDRR *));
- void (*swap_dnr_in) PARAMS ((bfd *, PTR, DNR *));
- void (*swap_pdr_in) PARAMS ((bfd *, PTR, PDR *));
- void (*swap_sym_in) PARAMS ((bfd *, PTR, SYMR *));
- void (*swap_opt_in) PARAMS ((bfd *, PTR, OPTR *));
- void (*swap_fdr_in) PARAMS ((bfd *, PTR, FDR *));
- void (*swap_rfd_in) PARAMS ((bfd *, PTR, RFDT *));
- void (*swap_ext_in) PARAMS ((bfd *, PTR, EXTR *));
- /* Functions to swap out external symbolic data. */
- void (*swap_hdr_out) PARAMS ((bfd *, const HDRR *, PTR));
- void (*swap_dnr_out) PARAMS ((bfd *, const DNR *, PTR));
- void (*swap_pdr_out) PARAMS ((bfd *, const PDR *, PTR));
- void (*swap_sym_out) PARAMS ((bfd *, const SYMR *, PTR));
- void (*swap_opt_out) PARAMS ((bfd *, const OPTR *, PTR));
- void (*swap_fdr_out) PARAMS ((bfd *, const FDR *, PTR));
- void (*swap_rfd_out) PARAMS ((bfd *, const RFDT *, PTR));
- void (*swap_ext_out) PARAMS ((bfd *, const EXTR *, PTR));
- /* It so happens that the auxiliary type information has the same
- type and format for all known ECOFF targets. I don't see any
- reason that that should change, so at least for now the auxiliary
- swapping information is not in this table. */
+ /* 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. */
typedef struct ecoff_tdata
{
- /* Constant backend information. */
- const struct ecoff_backend_data *backend_data;
-
/* The reloc file position, set by
ecoff_compute_section_file_positions. */
file_ptr reloc_filepos;
- /* The symbol table file position, set by ecoff_mkobject_hook. */
+ /* 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
/* The maximum size of objects to optimize using gp. This is
typically set by the -G option to the compiler, assembler or
linker. */
- int gp_size;
+ 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. */
+ 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 size of the unswapped ECOFF symbolic information. */
- bfd_size_type raw_size;
+ /* The ECOFF symbolic debugging information. */
+ struct ecoff_debug_info debug_info;
/* The unswapped ECOFF symbolic information. */
PTR raw_syments;
- /* The swapped ECOFF symbolic header. */
- HDRR symbolic_header;
-
- /* Pointers to the unswapped symbolic information. */
- unsigned char *line;
- PTR external_dnr; /* struct dnr_ext */
- PTR external_pdr; /* struct pdr_ext */
- PTR external_sym; /* struct sym_ext */
- PTR external_opt; /* struct opt_ext */
- union aux_ext *external_aux;
- char *ss;
- char *ssext;
- PTR external_fdr; /* struct fdr_ext */
- PTR external_rfd; /* struct rfd_ext */
- PTR external_ext; /* struct ext_ext */
-
- /* The swapped FDR information. */
- FDR *fdr;
-
- /* The FDR index. This is set for an input BFD to a link so that
- the external symbols can set their FDR index correctly. */
- unsigned int ifdbase;
-
/* 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. */
PTR native;
} ecoff_symbol_type;
-/* We take the address of the first element of a asymbol to ensure that the
+/* 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)))
-/* This is a hack borrowed from coffcode.h; 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) ((unsigned long) (symbol)->udata)
-#define ecoff_set_sym_index(symbol, idx) ((symbol)->udata = (PTR) (idx))
+/* 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;
+};
-/* Make an empty ECOFF symbol. */
-extern asymbol *ecoff_make_empty_symbol PARAMS ((bfd *abfd));
+/* 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 ecoff_slurp_symbolic_info PARAMS ((bfd *));
+extern boolean _bfd_ecoff_slurp_symbolic_info
+ PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
/* Generic ECOFF BFD backend vectors. */
-extern unsigned int ecoff_get_symtab_upper_bound PARAMS ((bfd *abfd));
-extern unsigned int ecoff_get_symtab PARAMS ((bfd *abfd,
- asymbol **alocation));
-extern void ecoff_get_symbol_info PARAMS ((bfd *abfd,
- asymbol *symbol,
- symbol_info *ret));
-extern void ecoff_print_symbol PARAMS ((bfd *abfd, PTR filep,
- asymbol *symbol,
- bfd_print_symbol_type how));
-extern unsigned int ecoff_canonicalize_reloc PARAMS ((bfd *abfd,
- asection *section,
- arelent **relptr,
- asymbol **symbols));
-extern CONST struct reloc_howto_struct *ecoff_bfd_reloc_type_lookup
- PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
-extern boolean ecoff_find_nearest_line PARAMS ((bfd *abfd,
- asection *section,
- asymbol **symbols,
- bfd_vma offset,
- CONST char **filename_ptr,
- CONST char **fnname_ptr,
- unsigned int *retline_ptr));
-extern boolean ecoff_bfd_seclet_link PARAMS ((bfd *abfd, PTR data,
- boolean relocateable));
-extern boolean ecoff_set_arch_mach PARAMS ((bfd *abfd,
- enum bfd_architecture arch,
- unsigned long machine));
-extern int ecoff_sizeof_headers PARAMS ((bfd *abfd, boolean reloc));
-extern boolean ecoff_set_section_contents PARAMS ((bfd *abfd,
- asection *section,
- PTR location,
- file_ptr offset,
- bfd_size_type count));
-extern boolean ecoff_write_object_contents PARAMS ((bfd *abfd));
-extern boolean ecoff_slurp_armap PARAMS ((bfd *abfd));
-extern boolean ecoff_write_armap PARAMS ((bfd *abfd, unsigned int elength,
- struct orl *map,
- unsigned int orl_count,
- int stridx));
-#define ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table
-extern bfd_target *ecoff_archive_p PARAMS ((bfd *abfd));
-#define ecoff_get_lineno \
- ((alent *(*) PARAMS ((bfd *, asymbol *))) bfd_nullvoidptr)
-#define ecoff_truncate_arname bfd_dont_truncate_arname
-#define ecoff_openr_next_archived_file bfd_generic_openr_next_archived_file
-#define ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt
-#define ecoff_get_section_contents bfd_generic_get_section_contents
-#define ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound
-#define ecoff_close_and_cleanup bfd_generic_close_and_cleanup
-#define ecoff_bfd_debug_info_start bfd_void
-#define ecoff_bfd_debug_info_end bfd_void
-#define ecoff_bfd_debug_info_accumulate \
- ((void (*) PARAMS ((bfd *, struct sec *))) bfd_void)
-#define ecoff_bfd_get_relocated_section_contents \
- bfd_generic_get_relocated_section_contents
-#define ecoff_bfd_relax_section bfd_generic_relax_section
-#define ecoff_bfd_make_debug_symbol \
- ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
+
+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));
+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 *));
+#define _bfd_ecoff_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
+extern boolean _bfd_ecoff_bfd_link_add_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+#define _bfd_ecoff_bfd_link_just_syms _bfd_generic_link_just_syms
+extern boolean _bfd_ecoff_bfd_final_link
+ PARAMS ((bfd *, struct bfd_link_info *));
/* Hook functions for the generic COFF section reading code. */
-extern asection *ecoff_make_section_hook PARAMS ((bfd *abfd, char *name));
-extern boolean ecoff_new_section_hook PARAMS ((bfd *abfd,
- asection *section));
-#define ecoff_set_alignment_hook \
+
+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 ecoff_set_arch_mach_hook PARAMS ((bfd *abfd, PTR filehdr));
-extern long ecoff_sec_to_styp_flags PARAMS ((CONST char *name,
- flagword flags));
-extern flagword ecoff_styp_to_sec_flags PARAMS ((bfd *abfd, PTR hdr));
-extern boolean ecoff_slurp_symbol_table PARAMS ((bfd *abfd));
+extern boolean _bfd_ecoff_set_arch_mach_hook PARAMS ((bfd *abfd, PTR filehdr));
+extern boolean _bfd_ecoff_styp_to_sec_flags
+ PARAMS ((bfd *, PTR, const char *, asection *, flagword *));
+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 *));
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