1 /* BFD back-end data structures for NLM (NetWare Loadable Modules) files.
2 Copyright (C) 1993-2017 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 3 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,
20 MA 02110-1301, USA. */
26 # define NLM_ARCH_SIZE ARCH_SIZE
28 #include "nlm/common.h"
29 #include "nlm/internal.h"
30 #include "nlm/external.h"
32 /* A reloc for an imported NLM symbol. Normal relocs are associated
33 with sections, and include a symbol. These relocs are associated
34 with (undefined) symbols, and include a section. */
38 /* Section of reloc. */
40 /* Reloc info (sym_ptr_ptr field set only when canonicalized). */
44 /* Information we keep for an NLM symbol. */
50 /* Number of reloc entries for imported symbol. */
52 /* Array of reloc information for imported symbol. */
53 struct nlm_relent *relocs;
54 } nlmNAME(symbol_type);
56 extern bfd_boolean nlm_mkobject (bfd *);
57 extern bfd_boolean nlm_set_arch_mach (bfd *, enum bfd_architecture, unsigned long);
58 extern void nlmNAME (get_symbol_info) (bfd *, asymbol *, symbol_info *);
59 extern long nlmNAME (get_symtab_upper_bound)(bfd *);
60 extern long nlmNAME (canonicalize_symtab) (bfd *, asymbol **);
61 extern asymbol * nlmNAME (make_empty_symbol) (bfd *);
62 extern void nlmNAME (print_symbol) (bfd *, void *, asymbol *, bfd_print_symbol_type);
63 extern long nlmNAME (get_reloc_upper_bound) (bfd *, asection *);
64 extern long nlmNAME (canonicalize_reloc) (bfd *, asection *, arelent **, asymbol **);
65 extern const bfd_target * nlmNAME (object_p) (bfd *);
66 extern bfd_boolean nlmNAME (set_arch_mach) (bfd *, enum bfd_architecture, unsigned long);
67 extern bfd_boolean nlmNAME (set_section_contents) (bfd *, asection *, const void *, file_ptr, bfd_size_type);
68 extern bfd_boolean nlmNAME (write_object_contents) (bfd *);
70 /* Some private data is stashed away for future use using the tdata pointer
71 in the bfd structure. */
75 /* Actual data, but ref like ptr */
76 Nlm_Internal_Fixed_Header nlm_fixed_hdr[1];
77 Nlm_Internal_Variable_Header nlm_variable_hdr[1];
78 Nlm_Internal_Version_Header nlm_version_hdr[1];
79 Nlm_Internal_Copyright_Header nlm_copyright_hdr[1];
80 Nlm_Internal_Extended_Header nlm_extended_hdr[1];
81 Nlm_Internal_Custom_Header nlm_custom_hdr[1];
82 Nlm_Internal_Cygnus_Ext_Header nlm_cygnus_ext_hdr[1];
83 /* BFD NLM symbols. */
84 nlmNAME (symbol_type) * nlm_symbols;
85 /* Lowest text and data VMA values. */
88 /* Caches for data read from object file. */
89 arelent * nlm_reloc_fixups;
90 asection ** nlm_reloc_fixup_secs;
91 /* Backend specific information. This should probably be a pointer,
92 but that would require yet another entry point to initialize the
96 struct /* Alpha backend information. */
98 bfd_vma gp; /* GP value. */
99 bfd_vma lita_address; /* .lita section address. */
100 bfd_size_type lita_size; /* .lita section size. */
107 #define nlm_tdata(bfd) ((bfd) -> tdata.nlm_obj_data)
108 #define nlm_fixed_header(bfd) (nlm_tdata (bfd) -> nlm_fixed_hdr)
109 #define nlm_variable_header(bfd) (nlm_tdata (bfd) -> nlm_variable_hdr)
110 #define nlm_version_header(bfd) (nlm_tdata (bfd) -> nlm_version_hdr)
111 #define nlm_copyright_header(bfd) (nlm_tdata (bfd) -> nlm_copyright_hdr)
112 #define nlm_extended_header(bfd) (nlm_tdata (bfd) -> nlm_extended_hdr)
113 #define nlm_custom_header(bfd) (nlm_tdata (bfd) -> nlm_custom_hdr)
114 #define nlm_cygnus_ext_header(bfd) (nlm_tdata (bfd) -> nlm_cygnus_ext_hdr)
115 #define nlm_get_symbols(bfd) (nlm_tdata (bfd) -> nlm_symbols)
116 #define nlm_set_symbols(bfd, p) (nlm_tdata (bfd) -> nlm_symbols = (p))
117 #define nlm_set_text_low(bfd, i) (nlm_tdata (bfd) -> nlm_text_low = (i))
118 #define nlm_get_text_low(bfd) (nlm_tdata (bfd) -> nlm_text_low)
119 #define nlm_set_data_low(bfd, i) (nlm_tdata (bfd) -> nlm_data_low = (i))
120 #define nlm_get_data_low(bfd) (nlm_tdata (bfd) -> nlm_data_low)
121 #define nlm_relocation_fixups(bfd) (nlm_tdata (bfd) -> nlm_reloc_fixups)
122 #define nlm_relocation_fixup_secs(bfd) (nlm_tdata (bfd) -> nlm_reloc_fixup_secs)
123 #define nlm_alpha_backend_data(bfd) (&nlm_tdata (bfd) -> backend_data.alpha_backend_data)
125 /* This is used when writing out the external relocs. */
133 /* We store some function pointer in the backend structure. This lets
134 different NLM targets share most of the same code, while providing
135 slightly different code where necessary. */
137 struct nlm_backend_data
139 /* Signature for this backend. */
140 char signature[NLM_SIGNATURE_SIZE];
141 /* Size of the fixed header. */
142 bfd_size_type fixed_header_size;
143 /* Size of optional prefix for this backend. Some backend may
144 require this to be a function, but so far a constant is OK. This
145 is for a prefix which precedes the standard NLM fixed header. */
146 bfd_size_type optional_prefix_size;
148 enum bfd_architecture arch;
151 /* Some NLM formats do not use the uninitialized data section, so
152 all uninitialized data must be put into the regular data section
154 bfd_boolean no_uninitialized_data;
155 /* Some NLM formats have a prefix on the file. If this function is
156 not NULL, it will be called by nlm_object_p. It should return
157 TRUE if this file could match this format, and it should leave
158 the BFD such that a bfd_bread will pick up the fixed header. */
159 bfd_boolean (*nlm_backend_object_p) (bfd *);
160 /* Write out the prefix. This function may be NULL. This must
161 write out the same number of bytes as is in the field
162 optional_prefix_size. */
163 bfd_boolean (*nlm_write_prefix) (bfd *);
164 /* Read a relocation fixup from abfd. The reloc information is
165 machine specific. The second argument is the symbol if this is
166 an import, or NULL if this is a reloc fixup. This function
167 should set the third argument to the section which the reloc
168 belongs in, and the fourth argument to the reloc itself; it does
169 not need to fill in the sym_ptr_ptr field for a reloc against an
171 bfd_boolean (*nlm_read_reloc) (bfd *, nlmNAME (symbol_type) *, asection **, arelent *);
172 /* To make objcopy to an i386 NLM work, the i386 backend needs a
173 chance to work over the relocs. This is a bit icky. */
174 bfd_boolean (*nlm_mangle_relocs) (bfd *, asection *, const void *, bfd_vma, bfd_size_type);
175 /* Read an import record from abfd. It would be nice if this
176 were in a machine-dependent format, but it doesn't seem to be. */
177 bfd_boolean (*nlm_read_import) (bfd *, nlmNAME (symbol_type) *);
178 /* Write an import record to abfd. */
179 bfd_boolean (*nlm_write_import) (bfd *, asection *, arelent *);
180 /* Set the section for a public symbol. This may be NULL, in which
181 case a default method will be used. */
182 bfd_boolean (*nlm_set_public_section) (bfd *, nlmNAME (symbol_type) *);
183 /* Get the offset to write out for a public symbol. This may be
184 NULL, in which case a default method will be used. */
185 bfd_vma (*nlm_get_public_offset) (bfd *, asymbol *);
186 /* Swap the fixed header in and out */
187 void (*nlm_swap_fhdr_in) (bfd *, void *, Nlm_Internal_Fixed_Header *);
188 void (*nlm_swap_fhdr_out) (bfd *, struct nlm_internal_fixed_header *, void *);
189 /* Write out an external reference. */
190 bfd_boolean (*nlm_write_external) (bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *);
191 bfd_boolean (*nlm_write_export) (bfd *, asymbol *, bfd_vma);
194 #define nlm_backend(bfd) ((struct nlm_backend_data *)((bfd) -> xvec -> backend_data))
195 #define nlm_signature(bfd) (nlm_backend (bfd) -> signature)
196 #define nlm_fixed_header_size(bfd) (nlm_backend (bfd) -> fixed_header_size)
197 #define nlm_optional_prefix_size(bfd) (nlm_backend (bfd) -> optional_prefix_size)
198 #define nlm_architecture(bfd) (nlm_backend (bfd) -> arch)
199 #define nlm_machine(bfd) (nlm_backend (bfd) -> mach)
200 #define nlm_no_uninitialized_data(bfd) (nlm_backend (bfd) -> no_uninitialized_data)
201 #define nlm_backend_object_p_func(bfd) (nlm_backend (bfd) -> nlm_backend_object_p)
202 #define nlm_write_prefix_func(bfd) (nlm_backend (bfd) -> nlm_write_prefix)
203 #define nlm_read_reloc_func(bfd) (nlm_backend (bfd) -> nlm_read_reloc)
204 #define nlm_mangle_relocs_func(bfd) (nlm_backend (bfd) -> nlm_mangle_relocs)
205 #define nlm_read_import_func(bfd) (nlm_backend (bfd) -> nlm_read_import)
206 #define nlm_write_import_func(bfd) (nlm_backend (bfd) -> nlm_write_import)
207 #define nlm_set_public_section_func(bfd) (nlm_backend (bfd) -> nlm_set_public_section)
208 #define nlm_get_public_offset_func(bfd) (nlm_backend (bfd) -> nlm_get_public_offset)
209 #define nlm_swap_fixed_header_in_func(bfd) (nlm_backend (bfd) -> nlm_swap_fhdr_in)
210 #define nlm_swap_fixed_header_out_func(bfd)(nlm_backend (bfd) -> nlm_swap_fhdr_out)
211 #define nlm_write_external_func(bfd) (nlm_backend (bfd) -> nlm_write_external)
212 #define nlm_write_export_func(bfd) (nlm_backend (bfd) -> nlm_write_export)
214 /* The NLM code, data, and uninitialized sections have no names defined
215 in the NLM, but bfd wants to give them names, so use the traditional
218 #define NLM_CODE_NAME ".text"
219 #define NLM_INITIALIZED_DATA_NAME ".data"
220 #define NLM_UNINITIALIZED_DATA_NAME ".bss"
222 #endif /* _LIBNLM_H_ */