223 lines
10 KiB
C
223 lines
10 KiB
C
/* BFD back-end data structures for NLM (NetWare Loadable Modules) files.
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Copyright (C) 1993-2018 Free Software Foundation, Inc.
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Written by 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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#ifndef _LIBNLM_H_
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#define _LIBNLM_H_ 1
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#ifdef ARCH_SIZE
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# define NLM_ARCH_SIZE ARCH_SIZE
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#endif
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#include "nlm/common.h"
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#include "nlm/internal.h"
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#include "nlm/external.h"
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/* A reloc for an imported NLM symbol. Normal relocs are associated
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with sections, and include a symbol. These relocs are associated
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with (undefined) symbols, and include a section. */
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struct nlm_relent
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{
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/* Section of reloc. */
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asection *section;
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/* Reloc info (sym_ptr_ptr field set only when canonicalized). */
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arelent reloc;
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};
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/* Information we keep for an NLM symbol. */
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typedef struct
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{
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/* BFD symbol. */
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asymbol symbol;
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/* Number of reloc entries for imported symbol. */
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bfd_size_type rcnt;
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/* Array of reloc information for imported symbol. */
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struct nlm_relent *relocs;
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} nlmNAME(symbol_type);
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extern bfd_boolean nlm_mkobject (bfd *);
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extern bfd_boolean nlm_set_arch_mach (bfd *, enum bfd_architecture, unsigned long);
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extern void nlmNAME (get_symbol_info) (bfd *, asymbol *, symbol_info *);
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extern long nlmNAME (get_symtab_upper_bound)(bfd *);
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extern long nlmNAME (canonicalize_symtab) (bfd *, asymbol **);
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extern asymbol * nlmNAME (make_empty_symbol) (bfd *);
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extern void nlmNAME (print_symbol) (bfd *, void *, asymbol *, bfd_print_symbol_type);
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extern long nlmNAME (get_reloc_upper_bound) (bfd *, asection *);
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extern long nlmNAME (canonicalize_reloc) (bfd *, asection *, arelent **, asymbol **);
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extern const bfd_target * nlmNAME (object_p) (bfd *);
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extern bfd_boolean nlmNAME (set_arch_mach) (bfd *, enum bfd_architecture, unsigned long);
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extern bfd_boolean nlmNAME (set_section_contents) (bfd *, asection *, const void *, file_ptr, bfd_size_type);
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extern bfd_boolean nlmNAME (write_object_contents) (bfd *);
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/* Some private data is stashed away for future use using the tdata pointer
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in the bfd structure. */
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struct nlm_obj_tdata
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{
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/* Actual data, but ref like ptr */
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Nlm_Internal_Fixed_Header nlm_fixed_hdr[1];
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Nlm_Internal_Variable_Header nlm_variable_hdr[1];
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Nlm_Internal_Version_Header nlm_version_hdr[1];
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Nlm_Internal_Copyright_Header nlm_copyright_hdr[1];
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Nlm_Internal_Extended_Header nlm_extended_hdr[1];
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Nlm_Internal_Custom_Header nlm_custom_hdr[1];
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Nlm_Internal_Cygnus_Ext_Header nlm_cygnus_ext_hdr[1];
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/* BFD NLM symbols. */
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nlmNAME (symbol_type) * nlm_symbols;
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/* Lowest text and data VMA values. */
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bfd_vma nlm_text_low;
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bfd_vma nlm_data_low;
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/* Caches for data read from object file. */
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arelent * nlm_reloc_fixups;
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asection ** nlm_reloc_fixup_secs;
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/* Backend specific information. This should probably be a pointer,
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but that would require yet another entry point to initialize the
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structure. */
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union
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{
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struct /* Alpha backend information. */
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{
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bfd_vma gp; /* GP value. */
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bfd_vma lita_address; /* .lita section address. */
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bfd_size_type lita_size; /* .lita section size. */
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}
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alpha_backend_data;
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}
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backend_data;
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};
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#define nlm_tdata(bfd) ((bfd) -> tdata.nlm_obj_data)
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#define nlm_fixed_header(bfd) (nlm_tdata (bfd) -> nlm_fixed_hdr)
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#define nlm_variable_header(bfd) (nlm_tdata (bfd) -> nlm_variable_hdr)
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#define nlm_version_header(bfd) (nlm_tdata (bfd) -> nlm_version_hdr)
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#define nlm_copyright_header(bfd) (nlm_tdata (bfd) -> nlm_copyright_hdr)
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#define nlm_extended_header(bfd) (nlm_tdata (bfd) -> nlm_extended_hdr)
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#define nlm_custom_header(bfd) (nlm_tdata (bfd) -> nlm_custom_hdr)
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#define nlm_cygnus_ext_header(bfd) (nlm_tdata (bfd) -> nlm_cygnus_ext_hdr)
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#define nlm_get_symbols(bfd) (nlm_tdata (bfd) -> nlm_symbols)
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#define nlm_set_symbols(bfd, p) (nlm_tdata (bfd) -> nlm_symbols = (p))
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#define nlm_set_text_low(bfd, i) (nlm_tdata (bfd) -> nlm_text_low = (i))
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#define nlm_get_text_low(bfd) (nlm_tdata (bfd) -> nlm_text_low)
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#define nlm_set_data_low(bfd, i) (nlm_tdata (bfd) -> nlm_data_low = (i))
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#define nlm_get_data_low(bfd) (nlm_tdata (bfd) -> nlm_data_low)
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#define nlm_relocation_fixups(bfd) (nlm_tdata (bfd) -> nlm_reloc_fixups)
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#define nlm_relocation_fixup_secs(bfd) (nlm_tdata (bfd) -> nlm_reloc_fixup_secs)
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#define nlm_alpha_backend_data(bfd) (&nlm_tdata (bfd) -> backend_data.alpha_backend_data)
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/* This is used when writing out the external relocs. */
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struct reloc_and_sec
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{
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arelent *rel;
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asection *sec;
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};
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/* We store some function pointer in the backend structure. This lets
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different NLM targets share most of the same code, while providing
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slightly different code where necessary. */
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struct nlm_backend_data
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{
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/* Signature for this backend. */
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char signature[NLM_SIGNATURE_SIZE];
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/* Size of the fixed header. */
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bfd_size_type fixed_header_size;
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/* Size of optional prefix for this backend. Some backend may
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require this to be a function, but so far a constant is OK. This
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is for a prefix which precedes the standard NLM fixed header. */
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bfd_size_type optional_prefix_size;
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/* Architecture. */
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enum bfd_architecture arch;
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/* Machine. */
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unsigned int mach;
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/* Some NLM formats do not use the uninitialized data section, so
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all uninitialized data must be put into the regular data section
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instead. */
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bfd_boolean no_uninitialized_data;
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/* Some NLM formats have a prefix on the file. If this function is
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not NULL, it will be called by nlm_object_p. It should return
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TRUE if this file could match this format, and it should leave
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the BFD such that a bfd_bread will pick up the fixed header. */
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bfd_boolean (*nlm_backend_object_p) (bfd *);
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/* Write out the prefix. This function may be NULL. This must
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write out the same number of bytes as is in the field
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optional_prefix_size. */
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bfd_boolean (*nlm_write_prefix) (bfd *);
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/* Read a relocation fixup from abfd. The reloc information is
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machine specific. The second argument is the symbol if this is
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an import, or NULL if this is a reloc fixup. This function
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should set the third argument to the section which the reloc
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belongs in, and the fourth argument to the reloc itself; it does
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not need to fill in the sym_ptr_ptr field for a reloc against an
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import symbol. */
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bfd_boolean (*nlm_read_reloc) (bfd *, nlmNAME (symbol_type) *, asection **, arelent *);
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/* To make objcopy to an i386 NLM work, the i386 backend needs a
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chance to work over the relocs. This is a bit icky. */
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bfd_boolean (*nlm_mangle_relocs) (bfd *, asection *, const void *, bfd_vma, bfd_size_type);
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/* Read an import record from abfd. It would be nice if this
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were in a machine-dependent format, but it doesn't seem to be. */
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bfd_boolean (*nlm_read_import) (bfd *, nlmNAME (symbol_type) *);
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/* Write an import record to abfd. */
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bfd_boolean (*nlm_write_import) (bfd *, asection *, arelent *);
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/* Set the section for a public symbol. This may be NULL, in which
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case a default method will be used. */
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bfd_boolean (*nlm_set_public_section) (bfd *, nlmNAME (symbol_type) *);
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/* Get the offset to write out for a public symbol. This may be
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NULL, in which case a default method will be used. */
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bfd_vma (*nlm_get_public_offset) (bfd *, asymbol *);
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/* Swap the fixed header in and out */
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void (*nlm_swap_fhdr_in) (bfd *, void *, Nlm_Internal_Fixed_Header *);
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void (*nlm_swap_fhdr_out) (bfd *, struct nlm_internal_fixed_header *, void *);
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/* Write out an external reference. */
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bfd_boolean (*nlm_write_external) (bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *);
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bfd_boolean (*nlm_write_export) (bfd *, asymbol *, bfd_vma);
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};
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#define nlm_backend(bfd) ((struct nlm_backend_data *)((bfd) -> xvec -> backend_data))
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#define nlm_signature(bfd) (nlm_backend (bfd) -> signature)
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#define nlm_fixed_header_size(bfd) (nlm_backend (bfd) -> fixed_header_size)
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#define nlm_optional_prefix_size(bfd) (nlm_backend (bfd) -> optional_prefix_size)
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#define nlm_architecture(bfd) (nlm_backend (bfd) -> arch)
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#define nlm_machine(bfd) (nlm_backend (bfd) -> mach)
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#define nlm_no_uninitialized_data(bfd) (nlm_backend (bfd) -> no_uninitialized_data)
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#define nlm_backend_object_p_func(bfd) (nlm_backend (bfd) -> nlm_backend_object_p)
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#define nlm_write_prefix_func(bfd) (nlm_backend (bfd) -> nlm_write_prefix)
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#define nlm_read_reloc_func(bfd) (nlm_backend (bfd) -> nlm_read_reloc)
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#define nlm_mangle_relocs_func(bfd) (nlm_backend (bfd) -> nlm_mangle_relocs)
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#define nlm_read_import_func(bfd) (nlm_backend (bfd) -> nlm_read_import)
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#define nlm_write_import_func(bfd) (nlm_backend (bfd) -> nlm_write_import)
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#define nlm_set_public_section_func(bfd) (nlm_backend (bfd) -> nlm_set_public_section)
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#define nlm_get_public_offset_func(bfd) (nlm_backend (bfd) -> nlm_get_public_offset)
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#define nlm_swap_fixed_header_in_func(bfd) (nlm_backend (bfd) -> nlm_swap_fhdr_in)
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#define nlm_swap_fixed_header_out_func(bfd)(nlm_backend (bfd) -> nlm_swap_fhdr_out)
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#define nlm_write_external_func(bfd) (nlm_backend (bfd) -> nlm_write_external)
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#define nlm_write_export_func(bfd) (nlm_backend (bfd) -> nlm_write_export)
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/* The NLM code, data, and uninitialized sections have no names defined
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in the NLM, but bfd wants to give them names, so use the traditional
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UNIX names. */
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#define NLM_CODE_NAME ".text"
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#define NLM_INITIALIZED_DATA_NAME ".data"
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#define NLM_UNINITIALIZED_DATA_NAME ".bss"
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#endif /* _LIBNLM_H_ */
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