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[binutils.git] / bfd / libnlm.h
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1 /* BFD back-end data structures for NLM (NetWare Loadable Modules) files.
2 Copyright 1993, 1994, 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
21 #ifndef _LIBNLM_H_
22 #define _LIBNLM_H_ 1
24 #ifdef ARCH_SIZE
25 # define NLM_ARCH_SIZE ARCH_SIZE
26 #endif
27 #include "nlm/common.h"
28 #include "nlm/internal.h"
29 #include "nlm/external.h"
31 /* A reloc for an imported NLM symbol. Normal relocs are associated
32 with sections, and include a symbol. These relocs are associated
33 with (undefined) symbols, and include a section. */
35 struct nlm_relent
37 /* Section of reloc. */
38 asection *section;
39 /* Reloc info (sym_ptr_ptr field set only when canonicalized). */
40 arelent reloc;
43 /* Information we keep for an NLM symbol. */
45 typedef struct
47 /* BFD symbol. */
48 asymbol symbol;
49 /* Number of reloc entries for imported symbol. */
50 bfd_size_type rcnt;
51 /* Array of reloc information for imported symbol. */
52 struct nlm_relent *relocs;
53 } nlmNAME(symbol_type);
55 extern bfd_boolean nlm_mkobject (bfd *);
56 extern bfd_boolean nlm_set_arch_mach (bfd *, enum bfd_architecture, unsigned long);
57 extern void nlmNAME (get_symbol_info) (bfd *, asymbol *, symbol_info *);
58 extern long nlmNAME (get_symtab_upper_bound)(bfd *);
59 extern long nlmNAME (canonicalize_symtab) (bfd *, asymbol **);
60 extern asymbol * nlmNAME (make_empty_symbol) (bfd *);
61 extern void nlmNAME (print_symbol) (bfd *, void *, asymbol *, bfd_print_symbol_type);
62 extern long nlmNAME (get_reloc_upper_bound) (bfd *, asection *);
63 extern long nlmNAME (canonicalize_reloc) (bfd *, asection *, arelent **, asymbol **);
64 extern const bfd_target * nlmNAME (object_p) (bfd *);
65 extern bfd_boolean nlmNAME (set_arch_mach) (bfd *, enum bfd_architecture, unsigned long);
66 extern bfd_boolean nlmNAME (set_section_contents) (bfd *, asection *, const void *, file_ptr, bfd_size_type);
67 extern bfd_boolean nlmNAME (write_object_contents) (bfd *);
69 /* Some private data is stashed away for future use using the tdata pointer
70 in the bfd structure. */
72 struct nlm_obj_tdata
74 /* Actual data, but ref like ptr */
75 Nlm_Internal_Fixed_Header nlm_fixed_hdr[1];
76 Nlm_Internal_Variable_Header nlm_variable_hdr[1];
77 Nlm_Internal_Version_Header nlm_version_hdr[1];
78 Nlm_Internal_Copyright_Header nlm_copyright_hdr[1];
79 Nlm_Internal_Extended_Header nlm_extended_hdr[1];
80 Nlm_Internal_Custom_Header nlm_custom_hdr[1];
81 Nlm_Internal_Cygnus_Ext_Header nlm_cygnus_ext_hdr[1];
82 /* BFD NLM symbols. */
83 nlmNAME (symbol_type) * nlm_symbols;
84 /* Lowest text and data VMA values. */
85 bfd_vma nlm_text_low;
86 bfd_vma nlm_data_low;
87 /* Caches for data read from object file. */
88 arelent * nlm_reloc_fixups;
89 asection ** nlm_reloc_fixup_secs;
90 /* Backend specific information. This should probably be a pointer,
91 but that would require yet another entry point to initialize the
92 structure. */
93 union
95 struct /* Alpha backend information. */
97 bfd_vma gp; /* GP value. */
98 bfd_vma lita_address; /* .lita section address. */
99 bfd_size_type lita_size; /* .lita section size. */
101 alpha_backend_data;
103 backend_data;
106 #define nlm_tdata(bfd) ((bfd) -> tdata.nlm_obj_data)
107 #define nlm_fixed_header(bfd) (nlm_tdata (bfd) -> nlm_fixed_hdr)
108 #define nlm_variable_header(bfd) (nlm_tdata (bfd) -> nlm_variable_hdr)
109 #define nlm_version_header(bfd) (nlm_tdata (bfd) -> nlm_version_hdr)
110 #define nlm_copyright_header(bfd) (nlm_tdata (bfd) -> nlm_copyright_hdr)
111 #define nlm_extended_header(bfd) (nlm_tdata (bfd) -> nlm_extended_hdr)
112 #define nlm_custom_header(bfd) (nlm_tdata (bfd) -> nlm_custom_hdr)
113 #define nlm_cygnus_ext_header(bfd) (nlm_tdata (bfd) -> nlm_cygnus_ext_hdr)
114 #define nlm_get_symbols(bfd) (nlm_tdata (bfd) -> nlm_symbols)
115 #define nlm_set_symbols(bfd, p) (nlm_tdata (bfd) -> nlm_symbols = (p))
116 #define nlm_set_text_low(bfd, i) (nlm_tdata (bfd) -> nlm_text_low = (i))
117 #define nlm_get_text_low(bfd) (nlm_tdata (bfd) -> nlm_text_low)
118 #define nlm_set_data_low(bfd, i) (nlm_tdata (bfd) -> nlm_data_low = (i))
119 #define nlm_get_data_low(bfd) (nlm_tdata (bfd) -> nlm_data_low)
120 #define nlm_relocation_fixups(bfd) (nlm_tdata (bfd) -> nlm_reloc_fixups)
121 #define nlm_relocation_fixup_secs(bfd) (nlm_tdata (bfd) -> nlm_reloc_fixup_secs)
122 #define nlm_alpha_backend_data(bfd) (&nlm_tdata (bfd) -> backend_data.alpha_backend_data)
124 /* This is used when writing out the external relocs. */
126 struct reloc_and_sec
128 arelent *rel;
129 asection *sec;
132 /* We store some function pointer in the backend structure. This lets
133 different NLM targets share most of the same code, while providing
134 slightly different code where necessary. */
136 struct nlm_backend_data
138 /* Signature for this backend. */
139 char signature[NLM_SIGNATURE_SIZE];
140 /* Size of the fixed header. */
141 bfd_size_type fixed_header_size;
142 /* Size of optional prefix for this backend. Some backend may
143 require this to be a function, but so far a constant is OK. This
144 is for a prefix which precedes the standard NLM fixed header. */
145 bfd_size_type optional_prefix_size;
146 /* Architecture. */
147 enum bfd_architecture arch;
148 /* Machine. */
149 unsigned int mach;
150 /* Some NLM formats do not use the uninitialized data section, so
151 all uninitialized data must be put into the regular data section
152 instead. */
153 bfd_boolean no_uninitialized_data;
154 /* Some NLM formats have a prefix on the file. If this function is
155 not NULL, it will be called by nlm_object_p. It should return
156 TRUE if this file could match this format, and it should leave
157 the BFD such that a bfd_bread will pick up the fixed header. */
158 bfd_boolean (*nlm_backend_object_p) (bfd *);
159 /* Write out the prefix. This function may be NULL. This must
160 write out the same number of bytes as is in the field
161 optional_prefix_size. */
162 bfd_boolean (*nlm_write_prefix) (bfd *);
163 /* Read a relocation fixup from abfd. The reloc information is
164 machine specific. The second argument is the symbol if this is
165 an import, or NULL if this is a reloc fixup. This function
166 should set the third argument to the section which the reloc
167 belongs in, and the fourth argument to the reloc itself; it does
168 not need to fill in the sym_ptr_ptr field for a reloc against an
169 import symbol. */
170 bfd_boolean (*nlm_read_reloc) (bfd *, nlmNAME (symbol_type) *, asection **, arelent *);
171 /* To make objcopy to an i386 NLM work, the i386 backend needs a
172 chance to work over the relocs. This is a bit icky. */
173 bfd_boolean (*nlm_mangle_relocs) (bfd *, asection *, const void *, bfd_vma, bfd_size_type);
174 /* Read an import record from abfd. It would be nice if this
175 were in a machine-dependent format, but it doesn't seem to be. */
176 bfd_boolean (*nlm_read_import) (bfd *, nlmNAME (symbol_type) *);
177 /* Write an import record to abfd. */
178 bfd_boolean (*nlm_write_import) (bfd *, asection *, arelent *);
179 /* Set the section for a public symbol. This may be NULL, in which
180 case a default method will be used. */
181 bfd_boolean (*nlm_set_public_section) (bfd *, nlmNAME (symbol_type) *);
182 /* Get the offset to write out for a public symbol. This may be
183 NULL, in which case a default method will be used. */
184 bfd_vma (*nlm_get_public_offset) (bfd *, asymbol *);
185 /* Swap the fixed header in and out */
186 void (*nlm_swap_fhdr_in) (bfd *, void *, Nlm_Internal_Fixed_Header *);
187 void (*nlm_swap_fhdr_out) (bfd *, struct nlm_internal_fixed_header *, void *);
188 /* Write out an external reference. */
189 bfd_boolean (*nlm_write_external) (bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *);
190 bfd_boolean (*nlm_write_export) (bfd *, asymbol *, bfd_vma);
193 #define nlm_backend(bfd) ((struct nlm_backend_data *)((bfd) -> xvec -> backend_data))
194 #define nlm_signature(bfd) (nlm_backend (bfd) -> signature)
195 #define nlm_fixed_header_size(bfd) (nlm_backend (bfd) -> fixed_header_size)
196 #define nlm_optional_prefix_size(bfd) (nlm_backend (bfd) -> optional_prefix_size)
197 #define nlm_architecture(bfd) (nlm_backend (bfd) -> arch)
198 #define nlm_machine(bfd) (nlm_backend (bfd) -> mach)
199 #define nlm_no_uninitialized_data(bfd) (nlm_backend (bfd) -> no_uninitialized_data)
200 #define nlm_backend_object_p_func(bfd) (nlm_backend (bfd) -> nlm_backend_object_p)
201 #define nlm_write_prefix_func(bfd) (nlm_backend (bfd) -> nlm_write_prefix)
202 #define nlm_read_reloc_func(bfd) (nlm_backend (bfd) -> nlm_read_reloc)
203 #define nlm_mangle_relocs_func(bfd) (nlm_backend (bfd) -> nlm_mangle_relocs)
204 #define nlm_read_import_func(bfd) (nlm_backend (bfd) -> nlm_read_import)
205 #define nlm_write_import_func(bfd) (nlm_backend (bfd) -> nlm_write_import)
206 #define nlm_set_public_section_func(bfd) (nlm_backend (bfd) -> nlm_set_public_section)
207 #define nlm_get_public_offset_func(bfd) (nlm_backend (bfd) -> nlm_get_public_offset)
208 #define nlm_swap_fixed_header_in_func(bfd) (nlm_backend (bfd) -> nlm_swap_fhdr_in)
209 #define nlm_swap_fixed_header_out_func(bfd)(nlm_backend (bfd) -> nlm_swap_fhdr_out)
210 #define nlm_write_external_func(bfd) (nlm_backend (bfd) -> nlm_write_external)
211 #define nlm_write_export_func(bfd) (nlm_backend (bfd) -> nlm_write_export)
213 /* The NLM code, data, and uninitialized sections have no names defined
214 in the NLM, but bfd wants to give them names, so use the traditional
215 UNIX names. */
217 #define NLM_CODE_NAME ".text"
218 #define NLM_INITIALIZED_DATA_NAME ".data"
219 #define NLM_UNINITIALIZED_DATA_NAME ".bss"
221 #endif /* _LIBNLM_H_ */