1 /* BFD XCOFF object file private structure.
2    Copyright (C) 2001-2016 Free Software Foundation, Inc.
3    Written by Tom Rix, Redhat.
4 
5    This file is part of BFD, the Binary File Descriptor library.
6 
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.
11 
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.
16 
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.  */
21 
22 #ifndef LIBXCOFF_H
23 #define LIBXCOFF_H
24 
25 /* This is the backend information kept for XCOFF files.  This
26    structure is constant for a particular backend.  The first element
27    is the COFF backend data structure, so that XCOFF targets can use
28    the generic COFF code.  */
29 
30 struct xcoff_backend_data_rec
31 {
32   /* COFF backend information.  */
33   bfd_coff_backend_data coff;
34 
35   /* Magic number.  */
36   unsigned short _xcoff_magic_number;
37 
38   /* Architecture and machine for coff_set_arch_mach_hook.  */
39   enum bfd_architecture _xcoff_architecture;
40   long _xcoff_machine;
41 
42   /* Function pointers to xcoff specific swap routines.  */
43   void (* _xcoff_swap_ldhdr_in) (bfd *, const void *, struct internal_ldhdr *);
44   void (* _xcoff_swap_ldhdr_out)(bfd *, const struct internal_ldhdr *, void *);
45   void (* _xcoff_swap_ldsym_in) (bfd *, const void *, struct internal_ldsym *);
46   void (* _xcoff_swap_ldsym_out)(bfd *, const struct internal_ldsym *, void *);
47   void (* _xcoff_swap_ldrel_in) (bfd *, const void *, struct internal_ldrel *);
48   void (* _xcoff_swap_ldrel_out)(bfd *, const struct internal_ldrel *, void *);
49 
50   /* Size of the external struct.  */
51   unsigned int _xcoff_ldhdrsz;
52   unsigned int _xcoff_ldsymsz;
53   unsigned int _xcoff_ldrelsz;
54 
55   /* Size an entry in a descriptor section.  */
56   unsigned int _xcoff_function_descriptor_size;
57 
58   /* Size of the small aout file header.  */
59   unsigned int _xcoff_small_aout_header_size;
60 
61   /* Loader version
62      1 : XCOFF32
63      2 : XCOFF64.  */
64   unsigned long _xcoff_ldhdr_version;
65 
66   bfd_boolean (* _xcoff_put_symbol_name)
67     (struct bfd_link_info *, struct bfd_strtab_hash *,
68      struct internal_syment *, const char *);
69 
70   bfd_boolean (* _xcoff_put_ldsymbol_name)
71     (bfd *, struct xcoff_loader_info *, struct internal_ldsym *,
72      const char *);
73 
74   reloc_howto_type *_xcoff_dynamic_reloc;
75 
76   asection * (* _xcoff_create_csect_from_smclas)
77     (bfd *, union internal_auxent *, const char *);
78 
79   /* Line number and relocation overflow.
80      XCOFF32 overflows to another section when the line number or the
81      relocation count exceeds 0xffff.  XCOFF64 does not overflow.  */
82   bfd_boolean (*_xcoff_is_lineno_count_overflow) (bfd *, bfd_vma);
83   bfd_boolean (*_xcoff_is_reloc_count_overflow)  (bfd *, bfd_vma);
84 
85   /* Loader section symbol and relocation table offset
86      XCOFF32 is after the .loader header
87      XCOFF64 is offset in .loader header.  */
88   bfd_vma (*_xcoff_loader_symbol_offset) (bfd *, struct internal_ldhdr *);
89   bfd_vma (*_xcoff_loader_reloc_offset)  (bfd *, struct internal_ldhdr *);
90 
91   /* Global linkage.  The first word of global linkage code must be be
92      modified by filling in the correct TOC offset.  */
93   unsigned long *_xcoff_glink_code;
94 
95   /* Size of the global link code in bytes of the xcoff_glink_code table.  */
96   unsigned long _xcoff_glink_size;
97 
98   /* rtinit.  */
99   unsigned int _xcoff_rtinit_size;
100   bfd_boolean (*_xcoff_generate_rtinit)
101     (bfd *, const char *, const char *, bfd_boolean);
102 };
103 
104 /* Look up an entry in an XCOFF link hash table.  */
105 #define xcoff_link_hash_lookup(table, string, create, copy, follow) \
106   ((struct xcoff_link_hash_entry *) \
107    bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\
108 			 (follow)))
109 
110 /* Traverse an XCOFF link hash table.  */
111 #define xcoff_link_hash_traverse(table, func, info)			\
112   (bfd_link_hash_traverse						\
113    (&(table)->root,							\
114     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func),	\
115     (info)))
116 
117 /* Get the XCOFF link hash table from the info structure.  This is
118    just a cast.  */
119 #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
120 
121 
122 #define xcoff_backend(abfd) \
123   ((struct xcoff_backend_data_rec *) (abfd)->xvec->backend_data)
124 
125 #define bfd_xcoff_magic_number(a) ((xcoff_backend (a)->_xcoff_magic_number))
126 #define bfd_xcoff_architecture(a) ((xcoff_backend (a)->_xcoff_architecture))
127 #define bfd_xcoff_machine(a)      ((xcoff_backend (a)->_xcoff_machine))
128 
129 #define bfd_xcoff_swap_ldhdr_in(a, b, c) \
130   ((xcoff_backend (a)->_xcoff_swap_ldhdr_in) ((a), (b), (c)))
131 
132 #define bfd_xcoff_swap_ldhdr_out(a, b, c) \
133   ((xcoff_backend (a)->_xcoff_swap_ldhdr_out) ((a), (b), (c)))
134 
135 #define bfd_xcoff_swap_ldsym_in(a, b, c) \
136   ((xcoff_backend (a)->_xcoff_swap_ldsym_in) ((a), (b), (c)))
137 
138 #define bfd_xcoff_swap_ldsym_out(a, b, c) \
139   ((xcoff_backend (a)->_xcoff_swap_ldsym_out) ((a), (b), (c)))
140 
141 #define bfd_xcoff_swap_ldrel_in(a, b, c) \
142   ((xcoff_backend (a)->_xcoff_swap_ldrel_in) ((a), (b), (c)))
143 
144 #define bfd_xcoff_swap_ldrel_out(a, b, c) \
145   ((xcoff_backend (a)->_xcoff_swap_ldrel_out) ((a), (b), (c)))
146 
147 #define bfd_xcoff_ldhdrsz(a) ((xcoff_backend (a)->_xcoff_ldhdrsz))
148 #define bfd_xcoff_ldsymsz(a) ((xcoff_backend (a)->_xcoff_ldsymsz))
149 #define bfd_xcoff_ldrelsz(a) ((xcoff_backend (a)->_xcoff_ldrelsz))
150 #define bfd_xcoff_function_descriptor_size(a) \
151   ((xcoff_backend (a)->_xcoff_function_descriptor_size))
152 #define bfd_xcoff_small_aout_header_size(a) \
153   ((xcoff_backend (a)->_xcoff_small_aout_header_size))
154 
155 #define bfd_xcoff_ldhdr_version(a) ((xcoff_backend (a)->_xcoff_ldhdr_version))
156 
157 #define bfd_xcoff_put_symbol_name(a, b, c, d, e) \
158   ((xcoff_backend (a)->_xcoff_put_symbol_name) ((b), (c), (d), (e)))
159 
160 #define bfd_xcoff_put_ldsymbol_name(a, b, c, d) \
161   ((xcoff_backend (a)->_xcoff_put_ldsymbol_name) ((a), (b), (c), (d)))
162 
163 /* Get the XCOFF hash table entries for a BFD.  */
164 #define obj_xcoff_sym_hashes(bfd) \
165   ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
166 
167 #define bfd_xcoff_dynamic_reloc_howto(a) \
168    ((xcoff_backend (a)->_xcoff_dynamic_reloc))
169 
170 #define bfd_xcoff_create_csect_from_smclas(a, b, c) \
171    ((xcoff_backend (a)->_xcoff_create_csect_from_smclas((a), (b), (c))))
172 
173 #define bfd_xcoff_is_lineno_count_overflow(a, b) \
174    ((xcoff_backend (a)->_xcoff_is_lineno_count_overflow((a), (b))))
175 
176 #define bfd_xcoff_is_reloc_count_overflow(a, b) \
177    ((xcoff_backend (a)->_xcoff_is_reloc_count_overflow((a), (b))))
178 
179 #define bfd_xcoff_loader_symbol_offset(a, b) \
180  ((xcoff_backend (a)->_xcoff_loader_symbol_offset((a), (b))))
181 
182 #define bfd_xcoff_loader_reloc_offset(a, b) \
183  ((xcoff_backend (a)->_xcoff_loader_reloc_offset((a), (b))))
184 
185 #define bfd_xcoff_glink_code(a, b)   ((xcoff_backend (a)->_xcoff_glink_code[(b)]))
186 #define bfd_xcoff_glink_code_size(a) ((xcoff_backend (a)->_xcoff_glink_size))
187 
188 /* Check for the magic number U803XTOCMAGIC or U64_TOCMAGIC for 64 bit
189    targets.  */
190 #define bfd_xcoff_is_xcoff64(a) \
191   (   (0x01EF == (bfd_xcoff_magic_number (a))) \
192    || (0x01F7 == (bfd_xcoff_magic_number (a))))
193 
194 /* Check for the magic number U802TOMAGIC for 32 bit targets.  */
195 #define bfd_xcoff_is_xcoff32(a) (0x01DF == (bfd_xcoff_magic_number (a)))
196 
197 #define bfd_xcoff_rtinit_size(a)              ((xcoff_backend (a)->_xcoff_rtinit_size))
198 #define bfd_xcoff_generate_rtinit(a, b, c, d) ((xcoff_backend (a)->_xcoff_generate_rtinit ((a), (b), (c), (d))))
199 
200 /* Accessor macros for tdata.  */
201 #define bfd_xcoff_text_align_power(a) ((xcoff_data (a)->text_align_power))
202 #define bfd_xcoff_data_align_power(a) ((xcoff_data (a)->data_align_power))
203 
204 /* xcoff*_ppc_relocate_section macros  */
205 #define XCOFF_MAX_CALCULATE_RELOCATION (0x1c)
206 #define XCOFF_MAX_COMPLAIN_OVERFLOW (4)
207 /* N_ONES produces N one bits, without overflowing machine arithmetic.  */
208 #ifdef N_ONES
209 #undef N_ONES
210 #endif
211 #define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1)
212 
213 #define XCOFF_RELOC_FUNCTION_ARGS \
214   bfd *, asection *, bfd *, struct internal_reloc *, \
215   struct internal_syment *, struct reloc_howto_struct *, bfd_vma, bfd_vma, \
216   bfd_vma *relocation, bfd_byte *contents
217 
218 #define XCOFF_COMPLAIN_FUNCTION_ARGS \
219   bfd *, bfd_vma, bfd_vma, struct reloc_howto_struct *howto
220 
221 extern bfd_boolean (*xcoff_calculate_relocation[XCOFF_MAX_CALCULATE_RELOCATION])
222   (XCOFF_RELOC_FUNCTION_ARGS);
223 extern bfd_boolean (*xcoff_complain_overflow[XCOFF_MAX_COMPLAIN_OVERFLOW])
224   (XCOFF_COMPLAIN_FUNCTION_ARGS);
225 
226 #define XCOFF_NO_LONG_SECTION_NAMES  (FALSE), bfd_coff_set_long_section_names_disallowed
227 
228 /* Relocation functions */
229 bfd_boolean xcoff_reloc_type_noop (XCOFF_RELOC_FUNCTION_ARGS);
230 bfd_boolean xcoff_reloc_type_fail (XCOFF_RELOC_FUNCTION_ARGS);
231 bfd_boolean xcoff_reloc_type_pos  (XCOFF_RELOC_FUNCTION_ARGS);
232 bfd_boolean xcoff_reloc_type_neg  (XCOFF_RELOC_FUNCTION_ARGS);
233 bfd_boolean xcoff_reloc_type_rel  (XCOFF_RELOC_FUNCTION_ARGS);
234 bfd_boolean xcoff_reloc_type_toc  (XCOFF_RELOC_FUNCTION_ARGS);
235 bfd_boolean xcoff_reloc_type_ba   (XCOFF_RELOC_FUNCTION_ARGS);
236 bfd_boolean xcoff_reloc_type_crel (XCOFF_RELOC_FUNCTION_ARGS);
237 
238 /* Structure to describe dwarf sections.
239    Useful to convert from XCOFF section name to flag and vice-versa.
240    Also mark if section has a length field at the beginning.  */
241 struct xcoff_dwsect_name {
242   /* A XCOFF dwarf section is identified by its name.  */
243   unsigned int flag;
244 
245   /* Corresponding XCOFF section name.  */
246   const char *name;
247 
248   /* True if size must be prepended.  */
249   bfd_boolean def_size;
250 };
251 
252 /* Number of entries in the array.  The number is known and public so that user
253    can 'extend' this array by index.  */
254 #define XCOFF_DWSECT_NBR_NAMES	8
255 
256 /* The dwarf sections array.  */
257 extern const struct xcoff_dwsect_name
258   xcoff_dwsect_names[XCOFF_DWSECT_NBR_NAMES];
259 
260 #endif /* LIBXCOFF_H */
261