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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [libnlm.h] - Blame information for rev 157

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1 24 jeremybenn
/* BFD back-end data structures for NLM (NetWare Loadable Modules) files.
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   Copyright 1993, 1994, 2001, 2002, 2003, 2005, 2007
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   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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