source: trunk/binutils/gas/config/obj-aout.h@ 2446

Last change on this file since 2446 was 610, checked in by bird, 22 years ago

This commit was generated by cvs2svn to compensate for changes in r609,
which included commits to RCS files with non-trunk default branches.
  • Property cvs2svn:cvs-rev set to 1.1.1.2
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 8.8 KB
Line 
1/* obj-aout.h, a.out object file format for gas, the assembler.
2 Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 2000,
3 2002, 2003 Free Software Foundation, Inc.
4
5 This file is part of GAS, the GNU Assembler.
6
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as
9 published by the Free Software Foundation; either version 2,
10 or (at your option) any later version.
11
12 GAS is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 the GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22/* Tag to validate a.out object file format processing */
23#define OBJ_AOUT 1
24
25#include "targ-cpu.h"
26
27#ifdef BFD_ASSEMBLER
28
29#include "bfd/libaout.h"
30
31#define OUTPUT_FLAVOR bfd_target_aout_flavour
32
33#else /* ! BFD_ASSEMBLER */
34
35#ifndef VMS
36#include "aout_gnu.h" /* Needed to define struct nlist. Sigh. */
37#else
38#include "a_out.h"
39#endif
40
41#ifndef AOUT_MACHTYPE
42#define AOUT_MACHTYPE 0
43#endif /* AOUT_MACHTYPE */
44
45extern const short seg_N_TYPE[];
46extern const segT N_TYPE_seg[];
47
48#ifndef DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE
49#define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (OMAGIC)
50#endif /* DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE */
51
52#endif /* ! BFD_ASSEMBLER */
53
54extern const pseudo_typeS aout_pseudo_table[];
55
56#ifndef obj_pop_insert
57#define obj_pop_insert() pop_insert (aout_pseudo_table)
58#endif
59
60/* SYMBOL TABLE */
61/* Symbol table entry data type */
62
63typedef struct nlist obj_symbol_type; /* Symbol table entry */
64
65/* Symbol table macros and constants */
66
67#ifdef BFD_ASSEMBLER
68
69#define S_SET_OTHER(S,V) \
70 (aout_symbol (symbol_get_bfdsym (S))->other = (V))
71#define S_SET_TYPE(S,T) \
72 (aout_symbol (symbol_get_bfdsym (S))->type = (T))
73#define S_SET_DESC(S,D) \
74 (aout_symbol (symbol_get_bfdsym (S))->desc = (D))
75#define S_GET_OTHER(S) \
76 (aout_symbol (symbol_get_bfdsym (S))->other)
77#define S_GET_TYPE(S) \
78 (aout_symbol (symbol_get_bfdsym (S))->type)
79#define S_GET_DESC(S) \
80 (aout_symbol (symbol_get_bfdsym (S))->desc)
81
82asection *text_section, *data_section, *bss_section;
83
84#define obj_frob_symbol(S,PUNT) obj_aout_frob_symbol (S, &PUNT)
85#define obj_frob_file_before_fix() obj_aout_frob_file_before_fix ()
86extern void obj_aout_frob_symbol PARAMS ((symbolS *, int *));
87extern void obj_aout_frob_file_before_fix PARAMS ((void));
88
89#define obj_sec_sym_ok_for_reloc(SEC) (1)
90
91#else
92
93/* We use the sy_obj field to record whether a symbol is weak. */
94#define OBJ_SYMFIELD_TYPE char
95
96/*
97 * Macros to extract information from a symbol table entry.
98 * This syntaxic indirection allows independence regarding a.out or coff.
99 * The argument (s) of all these macros is a pointer to a symbol table entry.
100 */
101
102/* True if the symbol is external */
103#define S_IS_EXTERNAL(s) ((s)->sy_symbol.n_type & N_EXT)
104
105/* True if symbol has been defined, ie is in N_{TEXT,DATA,BSS,ABS} or N_EXT */
106#define S_IS_DEFINED(s) \
107 (S_GET_TYPE (s) != N_UNDF || S_GET_DESC (s) != 0)
108
109#define S_IS_COMMON(s) \
110 (S_GET_TYPE (s) == N_UNDF && S_GET_VALUE (s) != 0)
111
112/* Return true for symbols that should not be reduced to section
113 symbols or eliminated from expressions, because they may be
114 overridden by the linker. */
115#define S_FORCE_RELOC(s, strict) \
116 (!SEG_NORMAL (S_GET_SEGMENT (s)))
117
118#define S_IS_REGISTER(s) ((s)->sy_symbol.n_type == N_REGISTER)
119
120/* True if a debug special symbol entry */
121#define S_IS_DEBUG(s) ((s)->sy_symbol.n_type & N_STAB)
122/* True if a symbol is local symbol name */
123#define S_IS_LOCAL(s) \
124 ((S_GET_NAME (s) \
125 && !S_IS_DEBUG (s) \
126 && (strchr (S_GET_NAME (s), '\001') != NULL \
127 || strchr (S_GET_NAME (s), '\002') != NULL \
128 || (S_LOCAL_NAME(s) && !flag_keep_locals))) \
129 || (flag_strip_local_absolute \
130 && ! S_IS_EXTERNAL(s) \
131 && S_GET_SEGMENT (s) == absolute_section))
132/* True if a symbol is not defined in this file */
133#define S_IS_EXTERN(s) ((s)->sy_symbol.n_type & N_EXT)
134/* True if the symbol has been generated because of a .stabd directive */
135#define S_IS_STABD(s) (S_GET_NAME(s) == (char *)0)
136
137/* Accessors */
138/* The name of the symbol */
139#define S_GET_NAME(s) ((s)->sy_symbol.n_un.n_name)
140/* The pointer to the string table */
141#define S_GET_OFFSET(s) ((s)->sy_symbol.n_un.n_strx)
142/* The type of the symbol */
143#define S_GET_TYPE(s) ((s)->sy_symbol.n_type & N_TYPE)
144/* The numeric value of the segment */
145#define S_GET_SEGMENT(s) (N_TYPE_seg[S_GET_TYPE(s)])
146/* The n_other expression value */
147#define S_GET_OTHER(s) ((s)->sy_symbol.n_other)
148/* The n_desc expression value */
149#define S_GET_DESC(s) ((s)->sy_symbol.n_desc)
150/* Whether the symbol is weak. */
151#define S_GET_WEAK(s) ((s)->sy_obj)
152
153/* Modifiers */
154/* Assume that a symbol cannot be simultaneously in more than on segment */
155/* set segment */
156#define S_SET_SEGMENT(s,seg) ((s)->sy_symbol.n_type &= ~N_TYPE,(s)->sy_symbol.n_type|=SEGMENT_TO_SYMBOL_TYPE(seg))
157/* The symbol is external */
158#define S_SET_EXTERNAL(s) ((s)->sy_symbol.n_type |= N_EXT)
159/* The symbol is not external */
160#define S_CLEAR_EXTERNAL(s) ((s)->sy_symbol.n_type &= ~N_EXT)
161/* Set the name of the symbol */
162#define S_SET_NAME(s,v) ((s)->sy_symbol.n_un.n_name = (v))
163/* Set the offset in the string table */
164#define S_SET_OFFSET(s,v) ((s)->sy_symbol.n_un.n_strx = (v))
165/* Set the n_type field */
166#define S_SET_TYPE(s,t) ((s)->sy_symbol.n_type = (t))
167/* Set the n_other expression value */
168#define S_SET_OTHER(s,v) ((s)->sy_symbol.n_other = (v))
169/* Set the n_desc expression value */
170#define S_SET_DESC(s,v) ((s)->sy_symbol.n_desc = (v))
171/* Mark the symbol as weak. This causes n_type to be adjusted when
172 the symbol is written out. */
173#define S_SET_WEAK(s) ((s)->sy_obj = 1)
174
175/* File header macro and type definition */
176
177#define H_GET_FILE_SIZE(h) (H_GET_HEADER_SIZE(h) \
178 + H_GET_TEXT_SIZE(h) \
179 + H_GET_DATA_SIZE(h) \
180 + H_GET_SYMBOL_TABLE_SIZE(h) \
181 + H_GET_TEXT_RELOCATION_SIZE(h) \
182 + H_GET_DATA_RELOCATION_SIZE(h) \
183 + H_GET_STRING_SIZE(h))
184
185#define H_GET_HEADER_SIZE(h) (EXEC_BYTES_SIZE)
186#define H_GET_TEXT_SIZE(h) ((h)->header.a_text)
187#define H_GET_DATA_SIZE(h) ((h)->header.a_data)
188#define H_GET_BSS_SIZE(h) ((h)->header.a_bss)
189#define H_GET_TEXT_RELOCATION_SIZE(h) ((h)->header.a_trsize)
190#define H_GET_DATA_RELOCATION_SIZE(h) ((h)->header.a_drsize)
191#define H_GET_SYMBOL_TABLE_SIZE(h) ((h)->header.a_syms)
192#define H_GET_ENTRY_POINT(h) ((h)->header.a_entry)
193#define H_GET_STRING_SIZE(h) ((h)->string_table_size)
194#define H_GET_LINENO_SIZE(h) (0)
195
196#define H_GET_DYNAMIC(h) ((h)->header.a_info >> 31)
197#define H_GET_VERSION(h) (((h)->header.a_info >> 24) & 0x7f)
198#define H_GET_MACHTYPE(h) (((h)->header.a_info >> 16) & 0xff)
199#define H_GET_MAGIC_NUMBER(h) ((h)->header.a_info & 0xffff)
200
201#define H_SET_DYNAMIC(h,v) ((h)->header.a_info = (((v) << 31) \
202 | (H_GET_VERSION(h) << 24) \
203 | (H_GET_MACHTYPE(h) << 16) \
204 | (H_GET_MAGIC_NUMBER(h))))
205
206#define H_SET_VERSION(h,v) ((h)->header.a_info = ((H_GET_DYNAMIC(h) << 31) \
207 | ((v) << 24) \
208 | (H_GET_MACHTYPE(h) << 16) \
209 | (H_GET_MAGIC_NUMBER(h))))
210
211#define H_SET_MACHTYPE(h,v) ((h)->header.a_info = ((H_GET_DYNAMIC(h) << 31) \
212 | (H_GET_VERSION(h) << 24) \
213 | ((v) << 16) \
214 | (H_GET_MAGIC_NUMBER(h))))
215
216#define H_SET_MAGIC_NUMBER(h,v) ((h)->header.a_info = ((H_GET_DYNAMIC(h) << 31) \
217 | (H_GET_VERSION(h) << 24) \
218 | (H_GET_MACHTYPE(h) << 16) \
219 | ((v))))
220
221#define H_SET_TEXT_SIZE(h,v) ((h)->header.a_text = md_section_align(SEG_TEXT, (v)))
222#define H_SET_DATA_SIZE(h,v) ((h)->header.a_data = md_section_align(SEG_DATA, (v)))
223#define H_SET_BSS_SIZE(h,v) ((h)->header.a_bss = md_section_align(SEG_BSS, (v)))
224
225#define H_SET_RELOCATION_SIZE(h,t,d) (H_SET_TEXT_RELOCATION_SIZE((h),(t)),\
226 H_SET_DATA_RELOCATION_SIZE((h),(d)))
227
228#define H_SET_TEXT_RELOCATION_SIZE(h,v) ((h)->header.a_trsize = (v))
229#define H_SET_DATA_RELOCATION_SIZE(h,v) ((h)->header.a_drsize = (v))
230#define H_SET_SYMBOL_TABLE_SIZE(h,v) ((h)->header.a_syms = (v) * 12)
231
232#define H_SET_ENTRY_POINT(h,v) ((h)->header.a_entry = (v))
233#define H_SET_STRING_SIZE(h,v) ((h)->string_table_size = (v))
234
235typedef struct
236 {
237 struct exec header; /* a.out header */
238 long string_table_size; /* names + '\0' + sizeof (int) */
239 }
240
241object_headers;
242
243/* line numbering stuff. */
244#define OBJ_EMIT_LINENO(a, b, c) {;}
245
246struct fix;
247void tc_aout_fix_to_chars PARAMS ((char *where, struct fix *fixP, relax_addressT segment_address));
248
249#endif
250
251#define obj_read_begin_hook() {;}
252#define obj_symbol_new_hook(s) {;}
253
254#define EMIT_SECTION_SYMBOLS 0
255
256#define AOUT_STABS
Note: See TracBrowser for help on using the repository browser.