* hosts/h-amix.h (free): Fix prototype.
[deliverable/binutils-gdb.git] / bfd / libaout.h
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69ebee86 1/* BFD back-end data structures for a.out (and similar) files.
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2 Copyright (C) 1990-1991 Free Software Foundation, Inc.
3 Written by Cygnus Support.
69ebee86 4
9e2dad8e 5This file is part of BFD, the Binary File Descriptor library.
69ebee86 6
9e2dad8e 7This program is free software; you can redistribute it and/or modify
4a81b561 8it under the terms of the GNU General Public License as published by
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9the Free Software Foundation; either version 2 of the License, or
10(at your option) any later version.
4a81b561 11
9e2dad8e 12This program is distributed in the hope that it will be useful,
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13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
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18along with this program; if not, write to the Free Software
19Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20
21/* We try to encapsulate the differences in the various a.out file
22 variants in a few routines, and otherwise share large masses of code.
23 This means we only have to fix bugs in one place, most of the time. */
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24
25/* $Id$ */
26
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27#ifdef __STDC__
28#define CAT3(a,b,c) a##b##c
29#else
30#define CAT3(a,b,c) a/**/b/**/c
31#endif
32
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33/* Parameterize the a.out code based on whether it is being built
34 for a 32-bit architecture or a 64-bit architecture. */
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35#if ARCH_SIZE==64
36#define GET_WORD bfd_h_get_64
37#define GET_SWORD (int64_type)GET_WORD
38#define PUT_WORD bfd_h_put_64
39#define NAME(x,y) CAT3(x,_64_,y)
40#define JNAME(x) CAT(x,_64)
41#define BYTES_IN_WORD 8
42#else
43#define GET_WORD bfd_h_get_32
44#define GET_SWORD (int32_type)GET_WORD
45#define PUT_WORD bfd_h_put_32
46#define NAME(x,y) CAT3(x,_32_,y)
47#define JNAME(x) CAT(x,_32)
48#define BYTES_IN_WORD 4
49#endif
50
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51#define adata(bfd) ((struct aoutdata *) ((bfd)->tdata))
52#define exec_hdr(bfd) (adata(bfd)->hdr)
53#define obj_textsec(bfd) (adata(bfd)->textsec)
54#define obj_datasec(bfd) (adata(bfd)->datasec)
55#define obj_bsssec(bfd) (adata(bfd)->bsssec)
56#define obj_sym_filepos(bfd) (adata(bfd)->sym_filepos)
57#define obj_str_filepos(bfd) (adata(bfd)->str_filepos)
4a81b561 58
69ebee86 59#define obj_reloc_entry_size(bfd) (adata(bfd)->reloc_entry_size)
4a81b561 60
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61/* Declare these types at file level, since they are used in parameter
62 lists, which have wierd scope. */
63struct external_exec;
64struct internal_exec;
65
69ebee86 66typedef struct aout_symbol {
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67 asymbol symbol;
68 short desc;
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69 char other;
70 unsigned char type;
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71} aout_symbol_type;
72
69ebee86 73struct aoutdata {
c0e5039e 74 struct internal_exec *hdr; /* exec file header */
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75 aout_symbol_type *symbols; /* symtab for input bfd */
76
77
78 /* For ease, we do this */
79 asection *textsec;
80 asection *datasec;
81 asection *bsssec;
82
83 /* We remember these offsets so that after check_file_format, we have
84 no dependencies on the particular format of the exec_hdr. */
85 file_ptr sym_filepos;
86 file_ptr str_filepos;
4a81b561 87
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88 /* Size of a relocation entry */
89 unsigned reloc_entry_size;
90};
4a81b561 91
4a81b561 92
69ebee86 93#define obj_outsymbols(bfd) ((PTR)(((struct aoutdata *) ((bfd)->tdata))->outsymbols))
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94
95
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96/* We take the address of the first element of an asymbol to ensure that the
97 * macro is only ever applied to an asymbol */
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98#define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))
99
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100/*#define obj_symbols(bfd) ((((struct aoutdata *) ((bfd)->tdata))->symbols))*/
101#define obj_aout_symbols(bfd) ((((struct aoutdata *) (bfd)->tdata))->symbols)
102#define obj_arch_flags(bfd) ((((struct aoutdata *) (bfd)->tdata))->arch_flags)
103
104#define get_tdata(x) ((struct aoutdata *)((x)->tdata))
105
c0e5039e 106/* Prototype declarations for functions defined in aoutx.h */
69ebee86 107
c0e5039e 108PROTO (boolean, NAME(aout,squirt_out_relocs),(bfd *abfd, asection *section));
69ebee86 109
c0e5039e 110PROTO (bfd_target *, NAME(aout,some_aout_object_p), (bfd *abfd,
69ebee86 111 bfd_target *(*callback)()));
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112PROTO (boolean, NAME(aout,mkobject), (bfd *abfd));
113PROTO (enum machine_type, NAME(aout,machine_type), (enum bfd_architecture arch,
69ebee86 114 unsigned long machine));
c0e5039e 115PROTO (boolean, NAME(aout,set_arch_mach), (bfd *abfd, enum bfd_architecture arch,
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116 unsigned long machine));
117
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118PROTO (boolean, NAME(aout,new_section_hook), (bfd *abfd, asection *newsect));
119PROTO (boolean, NAME(aout,set_section_contents), (bfd *abfd, sec_ptr section,
120 PTR location, file_ptr offset, bfd_size_type count));
121
122PROTO (asymbol *,NAME(aout,make_empty_symbol), (bfd *abfd));
123PROTO (boolean, NAME(aout,slurp_symbol_table), (bfd *abfd));
124PROTO (void, NAME(aout,write_syms), (bfd *abfd));
125PROTO (void, NAME(aout,reclaim_symbol_table), (bfd *abfd));
126PROTO (unsigned int, NAME(aout,get_symtab_upper_bound), (bfd *abfd));
127PROTO (unsigned int, NAME(aout,get_symtab), (bfd *abfd, asymbol **location));
128PROTO (boolean, NAME(aout,slurp_reloc_table), (bfd *abfd, sec_ptr asect,
69ebee86 129 asymbol **symbols));
c0e5039e 130PROTO (unsigned int, NAME(aout,canonicalize_reloc), (bfd *abfd, sec_ptr section,
69ebee86 131 arelent **relptr, asymbol **symbols));
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132PROTO (unsigned int, NAME(aout,get_reloc_upper_bound), (bfd *abfd, sec_ptr asect));
133PROTO (void, NAME(aout,reclaim_reloc), (bfd *ignore_abfd, sec_ptr ignore));
134PROTO (alent *, NAME(aout,get_lineno), (bfd *ignore_abfd, asymbol *ignore_symbol));
135PROTO (void, NAME(aout,print_symbol), (bfd *ignore_abfd, PTR file,
9e2dad8e 136 asymbol *symbol, bfd_print_symbol_type how));
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137PROTO (boolean, NAME(aout,close_and_cleanup), (bfd *abfd));
138PROTO (boolean, NAME(aout,find_nearest_line), (bfd *abfd, asection *section,
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139 asymbol **symbols, bfd_vma offset, CONST char **filename_ptr,
140 CONST char **functionname_ptr, unsigned int *line_ptr));
c0e5039e 141PROTO (int, NAME(aout,sizeof_headers), (bfd *ignore_abfd, boolean exec));
69ebee86 142
69ebee86 143
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144PROTO (void, NAME(aout,swap_exec_header_in), (bfd *abfd,
145 struct external_exec *raw_bytes, struct internal_exec *execp));
69ebee86 146
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147PROTO (void, NAME(aout,swap_exec_header_out),(bfd *abfd, struct internal_exec *execp,
148 struct external_exec *raw_bytes));
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149
150/* A.out uses the generic versions of these routines... */
151
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152#define aout_32_get_section_contents bfd_generic_get_section_contents
153#define aout_32_close_and_cleanup bfd_generic_close_and_cleanup
154
155#define aout_64_get_section_contents bfd_generic_get_section_contents
156#define aout_64_close_and_cleanup bfd_generic_close_and_cleanup
157
158/* Calculate the file positions of the parts of a newly read aout header */
159#define WORK_OUT_FILE_POSITIONS(abfd, execp) \
160 obj_datasec (abfd)->vma = N_DATADDR(*execp); \
161 obj_bsssec (abfd)->vma = N_BSSADDR(*execp); \
162 obj_textsec (abfd)->vma = N_TXTADDR(*execp); \
163 \
164 /* The file offsets of the sections */ \
165 obj_textsec (abfd)->filepos = N_TXTOFF (*execp); \
166 obj_datasec (abfd)->filepos = N_DATOFF (*execp); \
167 \
168 /* The file offsets of the relocation info */ \
169 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp); \
170 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp); \
171 \
172 /* The file offsets of the string table and symbol table. */ \
173 obj_sym_filepos (abfd) = N_SYMOFF (*execp); \
174 obj_str_filepos (abfd) = N_STROFF (*execp); \
175
176
177#define WRITE_HEADERS(abfd, execp) \
178 { \
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179 if ((obj_textsec(abfd)->vma & 0xff )== EXEC_BYTES_SIZE) \
180 abfd->flags |= D_PAGED; \
181 else \
182 abfd->flags &= ~D_PAGED; \
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183 if (abfd->flags & D_PAGED) \
184 { \
185 execp->a_text = obj_textsec (abfd)->size + EXEC_BYTES_SIZE; \
186 N_SET_MAGIC (*execp, ZMAGIC); \
187 } \
9e2dad8e 188 else \
c0e5039e 189 { \
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190 execp->a_text = obj_textsec (abfd)->size; \
191 if (abfd->flags & WP_TEXT) \
192 { N_SET_MAGIC (*execp, NMAGIC); } \
193 else \
194 { N_SET_MAGIC(*execp, OMAGIC); } \
c0e5039e 195 } \
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196 if (abfd->flags & D_PAGED) \
197 { \
198 data_pad = ((obj_datasec(abfd)->size + PAGE_SIZE -1) \
199 & (- PAGE_SIZE)) - obj_datasec(abfd)->size; \
200 \
201 if (data_pad > obj_bsssec(abfd)->size) \
202 execp->a_bss = 0; \
203 else \
204 execp->a_bss = obj_bsssec(abfd)->size - data_pad; \
205 execp->a_data = obj_datasec(abfd)->size + data_pad; \
206 } \
207 else \
208 { \
209 execp->a_data = obj_datasec (abfd)->size; \
210 execp->a_bss = obj_bsssec (abfd)->size; \
211 } \
212 \
213 execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_LIST_SIZE; \
214 execp->a_entry = bfd_get_start_address (abfd); \
215 \
216 execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \
217 obj_reloc_entry_size (abfd)); \
218 execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \
219 obj_reloc_entry_size (abfd)); \
220 NAME(aout,swap_exec_header_out) (abfd, execp, &exec_bytes); \
221 \
222 bfd_seek (abfd, 0L, false); \
223 bfd_write ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd); \
224 /* Now write out reloc info, followed by syms and strings */ \
225 \
226 if (bfd_get_symcount (abfd) != 0) \
227 { \
228 bfd_seek (abfd, \
229 (long)(N_SYMOFF(*execp)), false); \
230 \
231 NAME(aout,write_syms)(abfd); \
232 \
233 bfd_seek (abfd, (long)(N_TRELOFF(*execp)), false); \
234 \
235 if (!NAME(aout,squirt_out_relocs) (abfd, obj_textsec (abfd))) return false; \
236 bfd_seek (abfd, (long)(N_DRELOFF(*execp)), false); \
237 \
238 if (!NAME(aout,squirt_out_relocs)(abfd, obj_datasec (abfd))) return false; \
239 } \
240 }
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