| 1 | /* BFD back-end data structures for NLM (NetWare Loadable Modules) files.
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| 2 | Copyright 1993, 1994 Free Software Foundation, Inc.
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| 3 | Written by Cygnus Support.
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| 4 |
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| 5 | This file is part of BFD, the Binary File Descriptor library.
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| 6 |
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| 7 | This program is free software; you can redistribute it and/or modify
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| 8 | it under the terms of the GNU General Public License as published by
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| 9 | the Free Software Foundation; either version 2 of the License, or
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| 10 | (at your option) any later version.
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| 11 |
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| 12 | This program is distributed in the hope that it will be useful,
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | GNU General Public License for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with this program; if not, write to the Free Software
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| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 20 |
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| 21 | #ifndef _LIBNLM_H_
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| 22 | #define _LIBNLM_H_ 1
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| 23 |
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| 24 | #ifdef ARCH_SIZE
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| 25 | # define NLM_ARCH_SIZE ARCH_SIZE
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| 26 | #endif
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| 27 | #include "nlm/common.h"
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| 28 | #include "nlm/internal.h"
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| 29 | #include "nlm/external.h"
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| 30 |
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| 31 | /* A reloc for an imported NLM symbol. Normal relocs are associated
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| 32 | with sections, and include a symbol. These relocs are associated
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| 33 | with (undefined) symbols, and include a section. */
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| 34 |
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| 35 | struct nlm_relent
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| 36 | {
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| 37 | /* Section of reloc. */
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| 38 | asection *section;
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| 39 | /* Reloc info (sym_ptr_ptr field set only when canonicalized). */
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| 40 | arelent reloc;
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| 41 | };
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| 42 |
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| 43 | /* Information we keep for an NLM symbol. */
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| 44 |
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| 45 | typedef struct
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| 46 | {
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| 47 | /* BFD symbol. */
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| 48 | asymbol symbol;
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| 49 | /* Number of reloc entries for imported symbol. */
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| 50 | bfd_size_type rcnt;
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| 51 | /* Array of reloc information for imported symbol. */
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| 52 | struct nlm_relent *relocs;
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| 53 | } nlmNAME(symbol_type);
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| 54 |
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| 55 | extern boolean nlm_mkobject PARAMS ((bfd *));
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| 56 | extern boolean nlm_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
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| 57 | unsigned long));
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| 58 |
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| 59 | extern void nlmNAME(get_symbol_info)
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| 60 | PARAMS ((bfd *, asymbol *, symbol_info *));
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| 61 | extern long nlmNAME(get_symtab_upper_bound)
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| 62 | PARAMS ((bfd *));
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| 63 | extern long nlmNAME(get_symtab)
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| 64 | PARAMS ((bfd *, asymbol **));
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| 65 | extern asymbol *nlmNAME(make_empty_symbol)
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| 66 | PARAMS ((bfd *));
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| 67 | extern void nlmNAME(print_symbol)
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| 68 | PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
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| 69 | extern long nlmNAME(get_reloc_upper_bound)
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| 70 | PARAMS ((bfd *, asection *));
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| 71 | extern long nlmNAME(canonicalize_reloc)
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| 72 | PARAMS ((bfd *, asection *, arelent **, asymbol **));
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| 73 | extern const bfd_target *nlmNAME(object_p)
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| 74 | PARAMS ((bfd *));
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| 75 | extern boolean nlmNAME(set_arch_mach)
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| 76 | PARAMS ((bfd *, enum bfd_architecture, unsigned long));
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| 77 | extern boolean nlmNAME(set_section_contents)
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| 78 | PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
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| 79 | extern boolean nlmNAME(write_object_contents)
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| 80 | PARAMS ((bfd *));
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| 81 |
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| 82 | /* Some private data is stashed away for future use using the tdata pointer
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| 83 | in the bfd structure. */
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| 84 |
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| 85 | struct nlm_obj_tdata
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| 86 | {
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| 87 | /* Actual data, but ref like ptr */
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| 88 | Nlm_Internal_Fixed_Header nlm_fixed_hdr[1];
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| 89 | Nlm_Internal_Variable_Header nlm_variable_hdr[1];
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| 90 | Nlm_Internal_Version_Header nlm_version_hdr[1];
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| 91 | Nlm_Internal_Copyright_Header nlm_copyright_hdr[1];
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| 92 | Nlm_Internal_Extended_Header nlm_extended_hdr[1];
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| 93 | Nlm_Internal_Custom_Header nlm_custom_hdr[1];
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| 94 | Nlm_Internal_Cygnus_Ext_Header nlm_cygnus_ext_hdr[1];
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| 95 | /* BFD NLM symbols. */
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| 96 | nlmNAME(symbol_type) *nlm_symbols;
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| 97 | /* Lowest text and data VMA values. */
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| 98 | bfd_vma nlm_text_low;
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| 99 | bfd_vma nlm_data_low;
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| 100 | /* Caches for data read from object file. */
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| 101 | arelent * nlm_reloc_fixups;
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| 102 | asection ** nlm_reloc_fixup_secs;
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| 103 | /* Backend specific information. This should probably be a pointer,
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| 104 | but that would require yet another entry point to initialize the
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| 105 | structure. */
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| 106 | union
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| 107 | {
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| 108 | struct /* Alpha backend information. */
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| 109 | {
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| 110 | bfd_vma gp; /* GP value. */
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| 111 | bfd_vma lita_address; /* .lita section address. */
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| 112 | bfd_size_type lita_size; /* .lita section size. */
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| 113 | }
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| 114 | alpha_backend_data;
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| 115 | }
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| 116 | backend_data;
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| 117 | };
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| 118 |
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| 119 | #define nlm_tdata(bfd) ((bfd) -> tdata.nlm_obj_data)
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| 120 | #define nlm_fixed_header(bfd) (nlm_tdata(bfd) -> nlm_fixed_hdr)
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| 121 | #define nlm_variable_header(bfd) (nlm_tdata(bfd) -> nlm_variable_hdr)
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| 122 | #define nlm_version_header(bfd) (nlm_tdata(bfd) -> nlm_version_hdr)
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| 123 | #define nlm_copyright_header(bfd) (nlm_tdata(bfd) -> nlm_copyright_hdr)
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| 124 | #define nlm_extended_header(bfd) (nlm_tdata(bfd) -> nlm_extended_hdr)
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| 125 | #define nlm_custom_header(bfd) (nlm_tdata(bfd) -> nlm_custom_hdr)
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| 126 | #define nlm_cygnus_ext_header(bfd) (nlm_tdata(bfd) -> nlm_cygnus_ext_hdr)
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| 127 | #define nlm_get_symbols(bfd) (nlm_tdata(bfd) -> nlm_symbols)
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| 128 | #define nlm_set_symbols(bfd, p) (nlm_tdata(bfd) -> nlm_symbols = (p))
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| 129 | #define nlm_set_text_low(bfd, i) (nlm_tdata(bfd) -> nlm_text_low = (i))
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| 130 | #define nlm_get_text_low(bfd) (nlm_tdata(bfd) -> nlm_text_low)
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| 131 | #define nlm_set_data_low(bfd, i) (nlm_tdata(bfd) -> nlm_data_low = (i))
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| 132 | #define nlm_get_data_low(bfd) (nlm_tdata(bfd) -> nlm_data_low)
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| 133 | #define nlm_relocation_fixups(bfd) (nlm_tdata(bfd) -> nlm_reloc_fixups)
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| 134 | #define nlm_relocation_fixup_secs(bfd) (nlm_tdata(bfd)->nlm_reloc_fixup_secs)
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| 135 |
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| 136 | #define nlm_alpha_backend_data(bfd) \
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| 137 | (&nlm_tdata (bfd)->backend_data.alpha_backend_data)
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| 138 |
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| 139 | /* This is used when writing out the external relocs. */
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| 140 |
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| 141 | struct reloc_and_sec
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| 142 | {
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| 143 | arelent *rel;
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| 144 | asection *sec;
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| 145 | };
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| 146 |
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| 147 | /* We store some function pointer in the backend structure. This lets
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| 148 | different NLM targets share most of the same code, while providing
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| 149 | slightly different code where necessary. */
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| 150 |
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| 151 | struct nlm_backend_data
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| 152 | {
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| 153 | /* Signature for this backend. */
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| 154 | char signature[NLM_SIGNATURE_SIZE];
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| 155 | /* Size of the fixed header. */
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| 156 | bfd_size_type fixed_header_size;
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| 157 | /* Size of optional prefix for this backend. Some backend may
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| 158 | require this to be a function, but so far a constant is OK. This
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| 159 | is for a prefix which precedes the standard NLM fixed header. */
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| 160 | bfd_size_type optional_prefix_size;
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| 161 | /* Architecture. */
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| 162 | enum bfd_architecture arch;
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| 163 | /* Machine. */
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| 164 | long mach;
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| 165 | /* Some NLM formats do not use the uninitialized data section, so
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| 166 | all uninitialized data must be put into the regular data section
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| 167 | instead. */
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| 168 | boolean no_uninitialized_data;
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| 169 | /* Some NLM formats have a prefix on the file. If this function is
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| 170 | not NULL, it will be called by nlm_object_p. It should return
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| 171 | true if this file could match this format, and it should leave
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| 172 | the BFD such that a bfd_read will pick up the fixed header. */
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| 173 | boolean (*nlm_backend_object_p) PARAMS ((bfd *));
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| 174 | /* Write out the prefix. This function may be NULL. This must
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| 175 | write out the same number of bytes as is in the field
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| 176 | optional_prefix_size. */
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| 177 | boolean (*nlm_write_prefix) PARAMS ((bfd *));
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| 178 | /* Read a relocation fixup from abfd. The reloc information is
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| 179 | machine specific. The second argument is the symbol if this is
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| 180 | an import, or NULL if this is a reloc fixup. This function
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| 181 | should set the third argument to the section which the reloc
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| 182 | belongs in, and the fourth argument to the reloc itself; it does
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| 183 | not need to fill in the sym_ptr_ptr field for a reloc against an
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| 184 | import symbol. */
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| 185 | boolean (*nlm_read_reloc) PARAMS ((bfd *, nlmNAME(symbol_type) *,
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| 186 | asection **, arelent *));
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| 187 | /* To make objcopy to an i386 NLM work, the i386 backend needs a
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| 188 | chance to work over the relocs. This is a bit icky. */
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| 189 | boolean (*nlm_mangle_relocs) PARAMS ((bfd *, asection *, PTR data,
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| 190 | bfd_vma offset,
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| 191 | bfd_size_type count));
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| 192 | /* Read an import record from abfd. It would be nice if this
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| 193 | were in a machine-dependent format, but it doesn't seem to be. */
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| 194 | boolean (*nlm_read_import) PARAMS ((bfd *, nlmNAME(symbol_type) *));
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| 195 | /* Write an import record to abfd. */
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| 196 | boolean (*nlm_write_import) PARAMS ((bfd *, asection *, arelent *));
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| 197 | /* Set the section for a public symbol. This may be NULL, in which
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| 198 | case a default method will be used. */
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| 199 | boolean (*nlm_set_public_section) PARAMS ((bfd *, nlmNAME(symbol_type) *));
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| 200 | /* Get the offset to write out for a public symbol. This may be
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| 201 | NULL, in which case a default method will be used. */
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| 202 | bfd_vma (*nlm_get_public_offset) PARAMS ((bfd *, asymbol *));
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| 203 | /* Swap the fixed header in and out */
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| 204 | void (*nlm_swap_fhdr_in) PARAMS ((bfd *,
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| 205 | PTR,
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| 206 | Nlm_Internal_Fixed_Header *));
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| 207 | void (*nlm_swap_fhdr_out) PARAMS ((bfd *,
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| 208 | struct nlm_internal_fixed_header *,
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| 209 | PTR));
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| 210 | /* Write out an external reference. */
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| 211 | boolean (*nlm_write_external) PARAMS ((bfd *, bfd_size_type,
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| 212 | asymbol *,
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| 213 | struct reloc_and_sec *));
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| 214 | boolean (*nlm_write_export) PARAMS ((bfd *, asymbol *, bfd_vma));
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| 215 | };
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| 216 |
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| 217 | #define nlm_backend(bfd) \
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| 218 | ((struct nlm_backend_data *)((bfd) -> xvec -> backend_data))
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| 219 | #define nlm_signature(bfd) \
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| 220 | (nlm_backend(bfd) -> signature)
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| 221 | #define nlm_fixed_header_size(bfd) \
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| 222 | (nlm_backend(bfd) -> fixed_header_size)
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| 223 | #define nlm_optional_prefix_size(bfd) \
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| 224 | (nlm_backend(bfd) -> optional_prefix_size)
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| 225 | #define nlm_architecture(bfd) \
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| 226 | (nlm_backend(bfd) -> arch)
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| 227 | #define nlm_machine(bfd) \
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| 228 | (nlm_backend(bfd) -> mach)
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| 229 | #define nlm_no_uninitialized_data(bfd) \
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| 230 | (nlm_backend(bfd) -> no_uninitialized_data)
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| 231 | #define nlm_backend_object_p_func(bfd) \
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| 232 | (nlm_backend(bfd) -> nlm_backend_object_p)
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| 233 | #define nlm_write_prefix_func(bfd) \
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| 234 | (nlm_backend(bfd) -> nlm_write_prefix)
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| 235 | #define nlm_read_reloc_func(bfd) \
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| 236 | (nlm_backend(bfd) -> nlm_read_reloc)
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| 237 | #define nlm_mangle_relocs_func(bfd) \
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| 238 | (nlm_backend(bfd) -> nlm_mangle_relocs)
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| 239 | #define nlm_read_import_func(bfd) \
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| 240 | (nlm_backend(bfd) -> nlm_read_import)
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| 241 | #define nlm_write_import_func(bfd) \
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| 242 | (nlm_backend(bfd) -> nlm_write_import)
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| 243 | #define nlm_set_public_section_func(bfd) \
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| 244 | (nlm_backend(bfd) -> nlm_set_public_section)
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| 245 | #define nlm_get_public_offset_func(bfd) \
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| 246 | (nlm_backend(bfd) -> nlm_get_public_offset)
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| 247 | #define nlm_swap_fixed_header_in_func(bfd) \
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| 248 | (nlm_backend(bfd) -> nlm_swap_fhdr_in)
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| 249 | #define nlm_swap_fixed_header_out_func(bfd) \
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| 250 | (nlm_backend(bfd) -> nlm_swap_fhdr_out)
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| 251 | #define nlm_write_external_func(bfd) \
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| 252 | (nlm_backend(bfd) -> nlm_write_external)
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| 253 | #define nlm_write_export_func(bfd) \
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| 254 | (nlm_backend(bfd) -> nlm_write_export)
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| 255 |
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| 256 | /* The NLM code, data, and uninitialized sections have no names defined
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| 257 | in the NLM, but bfd wants to give them names, so use the traditional
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| 258 | UNIX names. */
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| 259 |
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| 260 | #define NLM_CODE_NAME ".text"
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| 261 | #define NLM_INITIALIZED_DATA_NAME ".data"
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| 262 | #define NLM_UNINITIALIZED_DATA_NAME ".bss"
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| 263 |
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| 264 | #endif /* _LIBNLM_H_ */
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