1 /* obj-aout.h, a.out object file format for gas, the assembler.
2 Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as
8 published by the Free Software Foundation; either version 2,
9 or (at your option) any later version.
11 GAS is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
14 the GNU General Public License for more details.
16 You should have received a copy of the GNU General Public
17 License along with GAS; see the file COPYING. If not, write
18 to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
22 * $FreeBSD: src/gnu/usr.bin/as/config/obj-aout.h,v 1.9 1999/08/27 23:34:29 peter Exp $
23 * $DragonFly: src/gnu/usr.bin/as/config/Attic/obj-aout.h,v 1.2 2003/06/17 04:25:44 dillon Exp $
27 /* Tag to validate a.out object file format processing */
32 #include "aout.h" /* Needed to define struct nlist. Sigh. */
35 #define AOUT_MACHTYPE 0
39 #define AOUT_VERSION 0
46 extern const short seg_N_TYPE[];
47 extern const segT N_TYPE_seg[];
48 #define N_REGISTER 0x12 /* Fake register type */
50 #ifndef DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE
51 #define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (OMAGIC)
52 #endif /* DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE */
54 /* First character of operand in `.type' directives */
55 #define TYPE_OPERAND_FMT '@'
58 /* Symbol table entry data type */
60 typedef struct nlist obj_symbol_type; /* Symbol table entry */
62 /* Symbol table macros and constants */
65 * Macros to extract information from a symbol table entry.
66 * This syntaxic indirection allows independence regarding a.out or coff.
67 * The argument (s) of all these macros is a pointer to a symbol table entry.
70 /* True if the symbol is external */
71 #define S_IS_EXTERNAL(s) ((s)->sy_symbol.n_type & N_EXT)
73 /* True if symbol has been defined, ie is in N_{TEXT,DATA,BSS,ABS} or N_EXT */
74 #define S_IS_DEFINED(s) ((S_GET_TYPE(s) != N_UNDF) || (S_GET_OTHER(s) != 0) || (S_GET_DESC(s) != 0))
76 #define S_IS_REGISTER(s) ((s)->sy_symbol.n_type == N_REGISTER)
78 /* True if a debug special symbol entry */
79 #define S_IS_DEBUG(s) ((s)->sy_symbol.n_type & N_STAB)
80 /* True if a symbol is local symbol name */
81 /* A symbol name whose name begin with ^A is a gas internal pseudo symbol
82 nameless symbols come from .stab directives. */
83 #define S_IS_LOCAL(s) (S_GET_NAME(s) && \
85 (S_GET_NAME(s)[0] == '\001' || \
86 (S_LOCAL_NAME(s) && !flagseen['L'])))
87 /* True if a symbol is not defined in this file */
88 #define S_IS_EXTERN(s) ((s)->sy_symbol.n_type & N_EXT)
89 /* True if the symbol has been generated because of a .stabd directive */
90 #define S_IS_STABD(s) (S_GET_NAME(s) == (char *)0)
93 /* The value of the symbol */
94 #define S_GET_VALUE(s) (((s)->sy_symbol.n_value))
95 /* The name of the symbol */
96 #define S_GET_NAME(s) ((s)->sy_symbol.n_un.n_name)
97 /* The pointer to the string table */
98 #define S_GET_OFFSET(s) ((s)->sy_symbol.n_un.n_strx)
99 /* The type of the symbol */
100 #define S_GET_TYPE(s) ((s)->sy_symbol.n_type & N_TYPE)
101 /* The numeric value of the segment */
102 #define S_GET_SEGMENT(s) (N_TYPE_seg[S_GET_TYPE(s)])
103 /* The n_other expression value */
104 #define S_GET_OTHER(s) ((s)->sy_symbol.n_other)
105 /* The n_desc expression value */
106 #define S_GET_DESC(s) ((s)->sy_symbol.n_desc)
109 /* Set the value of the symbol */
110 #define S_SET_VALUE(s,v) ((s)->sy_symbol.n_value = (unsigned long) (v))
111 /* Assume that a symbol cannot be simultaneously in more than on segment */
113 #define S_SET_SEGMENT(s,seg) ((s)->sy_symbol.n_type &= ~N_TYPE,(s)->sy_symbol.n_type|=SEGMENT_TO_SYMBOL_TYPE(seg))
114 /* The symbol is external */
115 #define S_SET_EXTERNAL(s) ((s)->sy_symbol.n_type |= N_EXT)
116 /* The symbol is not external */
117 #define S_CLEAR_EXTERNAL(s) ((s)->sy_symbol.n_type &= ~N_EXT)
118 /* Set the name of the symbol */
119 #define S_SET_NAME(s,v) ((s)->sy_symbol.n_un.n_name = (v))
120 /* Set the offset in the string table */
121 #define S_SET_OFFSET(s,v) ((s)->sy_symbol.n_un.n_strx = (v))
122 /* Set the n_other expression value */
123 #define S_SET_OTHER(s,v) ((s)->sy_symbol.n_other = (v))
124 /* Set the n_desc expression value */
125 #define S_SET_DESC(s,v) ((s)->sy_symbol.n_desc = (v))
127 /* File header macro and type definition */
129 #define H_GET_FILE_SIZE(h) (H_GET_HEADER_SIZE(h) \
130 + H_GET_TEXT_SIZE(h) \
131 + H_GET_DATA_SIZE(h) \
132 + H_GET_SYMBOL_TABLE_SIZE(h) \
133 + H_GET_TEXT_RELOCATION_SIZE(h) \
134 + H_GET_DATA_RELOCATION_SIZE(h) \
135 + H_GET_STRING_SIZE(h))
137 #ifndef H_GET_HEADER_SIZE
138 #define H_GET_HEADER_SIZE(h) (sizeof(struct exec))
139 #endif /* not H_GET_HEADER_SIZE */
141 #define H_GET_TEXT_SIZE(h) ((h)->header.a_text)
142 #define H_GET_DATA_SIZE(h) ((h)->header.a_data)
143 #define H_GET_BSS_SIZE(h) ((h)->header.a_bss)
144 #define H_GET_TEXT_RELOCATION_SIZE(h) ((h)->header.a_trsize)
145 #define H_GET_DATA_RELOCATION_SIZE(h) ((h)->header.a_drsize)
146 #define H_GET_SYMBOL_TABLE_SIZE(h) ((h)->header.a_syms)
147 #define H_GET_ENTRY_POINT(h) ((h)->header.a_entry)
148 #define H_GET_STRING_SIZE(h) ((h)->string_table_size)
149 #define H_GET_LINENO_SIZE(h) (0)
151 #if defined(FREEBSD_AOUT) || defined(NETBSD_AOUT)
153 #if defined(FREEBSD_AOUT)
154 /* duplicate part of <sys/imgact_aout.h> */
155 #define H_GET_FLAGS(h) \
156 ( (((h)->header.a_info)&0xffff) \
157 ? ((h)->header.a_info >> 26) & 0x3f ) \
160 #define H_GET_MACHTYPE(h) \
161 ( (((h)->header.a_info)&0xffff) \
162 ? ((h)->header.a_info >>16 ) & 0x3ff) \
166 #define H_GET_MAGIC_NUMBER(h) \
167 ( (((h)->header.a_info)&0xffff) \
168 ? ((h)->header.a_info & 0xffff) \
169 : (ntohl(((h)->header.a_info))&0xffff) \
172 #define H_SET_INFO(h,mag,mid,f,v) \
173 ( (h)->header.a_info = \
174 (((f)&0x3f)<<26) | (((mid)&0x03ff)<<16) | (((mag)&0xffff)) )
176 #endif /* FREEBSD_AOUT */
178 #if defined(NETBSD_AOUT)
179 /* SH*T, duplicate part of <a.out.h> */
180 #define H_GET_FLAGS(h) \
181 ( (((h)->header.a_info)&0xffff0000) \
182 ? ((ntohl(((h)->header.a_info))>>26)&0x3f) \
186 #define H_GET_MACHTYPE(h) \
187 ( (((h)->header.a_info)&0xffff0000) \
188 ? ((ntohl(((h)->header.a_info))>>16)&0x3ff) \
192 #define H_GET_MAGIC_NUMBER(h) \
193 ( (((h)->header.a_info)&0xffff0000) \
194 ? (ntohl(((h)->header.a_info))&0xffff) \
195 : ((h)->header.a_info & 0xffff) \
198 #define H_SET_INFO(h,mag,mid,f,v) \
199 ( (h)->header.a_info = \
200 htonl( (((f)&0x3f)<<26) | (((mid)&0x03ff)<<16) | (((mag)&0xffff)) ) )
202 #endif /* NETBSD_AOUT */
204 #define EX_DYNAMIC 0x20
207 #define AOUT_FLAGS (picmode ? EX_PIC : 0)
209 #define H_GET_DYNAMIC(h) (H_GET_FLAGS(h) & EX_DYNAMIC)
211 #define H_GET_VERSION(h) (0)
213 #define H_SET_DYNAMIC(h,v) \
214 H_SET_INFO(h, H_GET_MAGIC_NUMBER(h), H_GET_MACHTYPE(h), \
215 (v)?(H_GET_FLAGS(h)|0x20):(H_GET_FLAGS(h)&(~0x20)), 0)
217 #define H_SET_VERSION(h,v)
219 #define H_SET_MACHTYPE(h,v) \
220 H_SET_INFO(h, H_GET_MAGIC_NUMBER(h), (v), H_GET_FLAGS(h), 0)
222 #define H_SET_MAGIC_NUMBER(h,v) \
223 H_SET_INFO(h, (v), H_GET_MACHTYPE(h), H_GET_FLAGS(h), 0)
225 #else /* !(FREEBSD_AOUT || NETBSD_AOUT) */
227 #define H_GET_DYNAMIC(h) ((h)->header.a_info >> 31)
228 #define H_GET_VERSION(h) (((h)->header.a_info >> 24) & 0x7f)
229 #define H_GET_MACHTYPE(h) (((h)->header.a_info >> 16) & 0xff)
230 #define H_GET_MAGIC_NUMBER(h) ((h)->header.a_info & 0xffff)
232 #define H_SET_DYNAMIC(h,v) ((h)->header.a_info = \
234 | (H_GET_VERSION(h) << 24) \
235 | (H_GET_MACHTYPE(h) << 16) \
236 | (H_GET_MAGIC_NUMBER(h))))
238 #define H_SET_VERSION(h,v) ((h)->header.a_info = \
239 ((H_GET_DYNAMIC(h) << 31) \
241 | (H_GET_MACHTYPE(h) << 16) \
242 | (H_GET_MAGIC_NUMBER(h))))
244 #define H_SET_MACHTYPE(h,v) ((h)->header.a_info = \
245 ((H_GET_DYNAMIC(h) << 31) \
246 | (H_GET_VERSION(h) << 24) \
248 | (H_GET_MAGIC_NUMBER(h))))
250 #define H_SET_MAGIC_NUMBER(h,v) ((h)->header.a_info = \
251 ((H_GET_DYNAMIC(h) << 31) \
252 | (H_GET_VERSION(h) << 24) \
253 | (H_GET_MACHTYPE(h) << 16) \
255 #define H_SET_INFO(h,mag,mid,f,v) ((h)->header.a_info = \
256 ((((f)==0x20) << 31) \
260 #endif /* FREEBSD_AOUT || NETBSD_AOUT */
262 #define H_SET_TEXT_SIZE(h,v) ((h)->header.a_text = md_section_align(SEG_TEXT, (v)))
263 #define H_SET_DATA_SIZE(h,v) ((h)->header.a_data = md_section_align(SEG_DATA, (v)))
264 #define H_SET_BSS_SIZE(h,v) ((h)->header.a_bss = md_section_align(SEG_BSS, (v)))
266 #define H_SET_RELOCATION_SIZE(h,t,d) (H_SET_TEXT_RELOCATION_SIZE((h),(t)),\
267 H_SET_DATA_RELOCATION_SIZE((h),(d)))
269 #define H_SET_TEXT_RELOCATION_SIZE(h,v) ((h)->header.a_trsize = (v))
270 #define H_SET_DATA_RELOCATION_SIZE(h,v) ((h)->header.a_drsize = (v))
271 #define H_SET_SYMBOL_TABLE_SIZE(h,v) ((h)->header.a_syms = (v) * \
272 sizeof(struct nlist))
274 #define H_SET_ENTRY_POINT(h,v) ((h)->header.a_entry = (v))
275 #define H_SET_STRING_SIZE(h,v) ((h)->string_table_size = (v))
278 * Current means for getting the name of a segment.
279 * This will change for infinite-segments support (e.g. COFF).
281 #define segment_name(seg) (seg_name[(int)(seg)])
282 extern char *const seg_name[];
285 struct exec header; /* a.out header */
286 long string_table_size; /* names + '\0' + sizeof(int) */
289 /* line numbering stuff. */
290 #define OBJ_EMIT_LINENO(a, b, c) {;}
292 #define obj_symbol_new_hook(s) {;}
296 void tc_aout_fix_to_chars(char *where, struct fix *fixP, relax_addressT segment_address);
297 #else /* not __STDC__ */
298 void tc_aout_fix_to_chars();
299 #endif /* not __STDC__ */
308 /* end of obj-aout.h */