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def66e24 DM |
1 | /* obj-aout.h, a.out object file format for gas, the assembler. |
2 | Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc. | |
3 | ||
a39116f1 | 4 | This file is part of GAS, the GNU Assembler. |
def66e24 | 5 | |
a39116f1 RP |
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. | |
def66e24 | 10 | |
a39116f1 RP |
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. | |
def66e24 | 15 | |
a39116f1 RP |
16 | You should have received a copy of the GNU General Public |
17 | License along with GAS; see the file COPYING. If not, write | |
9e396994 | 18 | to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
fecd2382 | 19 | |
fecd2382 RP |
20 | /* Tag to validate a.out object file format processing */ |
21 | #define OBJ_AOUT 1 | |
22 | ||
23 | #include "targ-cpu.h" | |
24 | ||
def66e24 DM |
25 | #ifdef BFD_ASSEMBLER |
26 | ||
9e396994 | 27 | #include "bfd/libaout.h" |
def66e24 | 28 | |
9e396994 | 29 | #define OUTPUT_FLAVOR bfd_target_aout_flavour |
def66e24 DM |
30 | |
31 | #else /* ! BFD_ASSEMBLER */ | |
32 | ||
33 | #ifndef VMS | |
34 | #include "aout_gnu.h" /* Needed to define struct nlist. Sigh. */ | |
fecd2382 RP |
35 | #else |
36 | #include "a_out.h" | |
37 | #endif | |
38 | ||
a39116f1 RP |
39 | #ifndef AOUT_MACHTYPE |
40 | #define AOUT_MACHTYPE 0 | |
41 | #endif /* AOUT_MACHTYPE */ | |
d1a9e594 | 42 | |
fecd2382 | 43 | extern const short seg_N_TYPE[]; |
def66e24 | 44 | extern const segT N_TYPE_seg[]; |
fecd2382 RP |
45 | |
46 | #ifndef DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE | |
47 | #define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (OMAGIC) | |
48 | #endif /* DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE */ | |
49 | ||
def66e24 DM |
50 | #endif /* ! BFD_ASSEMBLER */ |
51 | ||
fecd2382 RP |
52 | /* SYMBOL TABLE */ |
53 | /* Symbol table entry data type */ | |
54 | ||
def66e24 | 55 | typedef struct nlist obj_symbol_type; /* Symbol table entry */ |
fecd2382 | 56 | |
fecd2382 RP |
57 | /* Symbol table macros and constants */ |
58 | ||
def66e24 DM |
59 | #ifdef BFD_ASSEMBLER |
60 | ||
61 | #define S_SET_OTHER(S,V) (aout_symbol((S)->bsym)->other = (V)) | |
62 | #define S_SET_TYPE(S,T) (aout_symbol((S)->bsym)->type = (T)) | |
63 | #define S_SET_DESC(S,D) (aout_symbol((S)->bsym)->desc = (D)) | |
64 | #define S_GET_OTHER(S) (aout_symbol((S)->bsym)->other) | |
65 | #define S_GET_TYPE(S) (aout_symbol((S)->bsym)->type) | |
66 | #define S_GET_DESC(S) (aout_symbol((S)->bsym)->desc) | |
67 | ||
68 | asection *text_section, *data_section, *bss_section; | |
69 | ||
70 | #define obj_frob_symbol(S,PUNT) obj_aout_frob_symbol (S, &PUNT) | |
71 | #define obj_frob_file() obj_aout_frob_file () | |
72 | extern void obj_aout_frob_symbol PARAMS ((struct symbol *, int *)); | |
73 | extern void obj_aout_frob_file PARAMS ((void)); | |
74 | ||
75 | #define obj_sec_sym_ok_for_reloc(SEC) (1) | |
76 | ||
77 | #else | |
78 | ||
9e396994 ILT |
79 | /* We use the sy_obj field to record whether a symbol is weak. */ |
80 | #define OBJ_SYMFIELD_TYPE char | |
81 | ||
fecd2382 RP |
82 | /* |
83 | * Macros to extract information from a symbol table entry. | |
84 | * This syntaxic indirection allows independence regarding a.out or coff. | |
85 | * The argument (s) of all these macros is a pointer to a symbol table entry. | |
86 | */ | |
87 | ||
88 | /* True if the symbol is external */ | |
89 | #define S_IS_EXTERNAL(s) ((s)->sy_symbol.n_type & N_EXT) | |
90 | ||
91 | /* True if symbol has been defined, ie is in N_{TEXT,DATA,BSS,ABS} or N_EXT */ | |
92 | #define S_IS_DEFINED(s) ((S_GET_TYPE(s) != N_UNDF) || (S_GET_OTHER(s) != 0) || (S_GET_DESC(s) != 0)) | |
93 | ||
94 | #define S_IS_REGISTER(s) ((s)->sy_symbol.n_type == N_REGISTER) | |
95 | ||
96 | /* True if a debug special symbol entry */ | |
97 | #define S_IS_DEBUG(s) ((s)->sy_symbol.n_type & N_STAB) | |
98 | /* True if a symbol is local symbol name */ | |
9e396994 ILT |
99 | #define S_IS_LOCAL(s) \ |
100 | (S_GET_NAME (s) \ | |
101 | && !S_IS_DEBUG (s) \ | |
102 | && (strchr (S_GET_NAME (s), '\001') != NULL \ | |
103 | || strchr (S_GET_NAME (s), '\002') != NULL \ | |
104 | || (S_LOCAL_NAME(s) && !flag_keep_locals))) | |
fecd2382 RP |
105 | /* True if a symbol is not defined in this file */ |
106 | #define S_IS_EXTERN(s) ((s)->sy_symbol.n_type & N_EXT) | |
107 | /* True if the symbol has been generated because of a .stabd directive */ | |
108 | #define S_IS_STABD(s) (S_GET_NAME(s) == (char *)0) | |
109 | ||
110 | /* Accessors */ | |
fecd2382 RP |
111 | /* The name of the symbol */ |
112 | #define S_GET_NAME(s) ((s)->sy_symbol.n_un.n_name) | |
113 | /* The pointer to the string table */ | |
114 | #define S_GET_OFFSET(s) ((s)->sy_symbol.n_un.n_strx) | |
115 | /* The type of the symbol */ | |
116 | #define S_GET_TYPE(s) ((s)->sy_symbol.n_type & N_TYPE) | |
117 | /* The numeric value of the segment */ | |
118 | #define S_GET_SEGMENT(s) (N_TYPE_seg[S_GET_TYPE(s)]) | |
119 | /* The n_other expression value */ | |
120 | #define S_GET_OTHER(s) ((s)->sy_symbol.n_other) | |
121 | /* The n_desc expression value */ | |
122 | #define S_GET_DESC(s) ((s)->sy_symbol.n_desc) | |
9e396994 ILT |
123 | /* Whether the symbol is weak. */ |
124 | #define S_GET_WEAK(s) ((s)->sy_obj) | |
fecd2382 RP |
125 | |
126 | /* Modifiers */ | |
fecd2382 | 127 | /* Assume that a symbol cannot be simultaneously in more than on segment */ |
a39116f1 | 128 | /* set segment */ |
fecd2382 RP |
129 | #define S_SET_SEGMENT(s,seg) ((s)->sy_symbol.n_type &= ~N_TYPE,(s)->sy_symbol.n_type|=SEGMENT_TO_SYMBOL_TYPE(seg)) |
130 | /* The symbol is external */ | |
131 | #define S_SET_EXTERNAL(s) ((s)->sy_symbol.n_type |= N_EXT) | |
132 | /* The symbol is not external */ | |
133 | #define S_CLEAR_EXTERNAL(s) ((s)->sy_symbol.n_type &= ~N_EXT) | |
134 | /* Set the name of the symbol */ | |
135 | #define S_SET_NAME(s,v) ((s)->sy_symbol.n_un.n_name = (v)) | |
136 | /* Set the offset in the string table */ | |
137 | #define S_SET_OFFSET(s,v) ((s)->sy_symbol.n_un.n_strx = (v)) | |
def66e24 DM |
138 | /* Set the n_type field */ |
139 | #define S_SET_TYPE(s,t) ((s)->sy_symbol.n_type = (t)) | |
fecd2382 RP |
140 | /* Set the n_other expression value */ |
141 | #define S_SET_OTHER(s,v) ((s)->sy_symbol.n_other = (v)) | |
142 | /* Set the n_desc expression value */ | |
143 | #define S_SET_DESC(s,v) ((s)->sy_symbol.n_desc = (v)) | |
9e396994 ILT |
144 | /* Mark the symbol as weak. This causes n_type to be adjusted when |
145 | the symbol is written out. */ | |
146 | #define S_SET_WEAK(s) ((s)->sy_obj = 1) | |
fecd2382 RP |
147 | |
148 | /* File header macro and type definition */ | |
149 | ||
f6e504fe RP |
150 | #define H_GET_FILE_SIZE(h) (H_GET_HEADER_SIZE(h) \ |
151 | + H_GET_TEXT_SIZE(h) \ | |
152 | + H_GET_DATA_SIZE(h) \ | |
153 | + H_GET_SYMBOL_TABLE_SIZE(h) \ | |
154 | + H_GET_TEXT_RELOCATION_SIZE(h) \ | |
155 | + H_GET_DATA_RELOCATION_SIZE(h) \ | |
156 | + H_GET_STRING_SIZE(h)) | |
fecd2382 | 157 | |
def66e24 | 158 | #define H_GET_HEADER_SIZE(h) (EXEC_BYTES_SIZE) |
fecd2382 RP |
159 | #define H_GET_TEXT_SIZE(h) ((h)->header.a_text) |
160 | #define H_GET_DATA_SIZE(h) ((h)->header.a_data) | |
161 | #define H_GET_BSS_SIZE(h) ((h)->header.a_bss) | |
162 | #define H_GET_TEXT_RELOCATION_SIZE(h) ((h)->header.a_trsize) | |
163 | #define H_GET_DATA_RELOCATION_SIZE(h) ((h)->header.a_drsize) | |
164 | #define H_GET_SYMBOL_TABLE_SIZE(h) ((h)->header.a_syms) | |
fecd2382 RP |
165 | #define H_GET_ENTRY_POINT(h) ((h)->header.a_entry) |
166 | #define H_GET_STRING_SIZE(h) ((h)->string_table_size) | |
f6e504fe RP |
167 | #define H_GET_LINENO_SIZE(h) (0) |
168 | ||
a39116f1 RP |
169 | #define H_GET_DYNAMIC(h) ((h)->header.a_info >> 31) |
170 | #define H_GET_VERSION(h) (((h)->header.a_info >> 24) & 0x7f) | |
171 | #define H_GET_MACHTYPE(h) (((h)->header.a_info >> 16) & 0xff) | |
172 | #define H_GET_MAGIC_NUMBER(h) ((h)->header.a_info & 0xffff) | |
f6e504fe | 173 | |
a39116f1 RP |
174 | #define H_SET_DYNAMIC(h,v) ((h)->header.a_info = (((v) << 31) \ |
175 | | (H_GET_VERSION(h) << 24) \ | |
176 | | (H_GET_MACHTYPE(h) << 16) \ | |
177 | | (H_GET_MAGIC_NUMBER(h)))) | |
178 | ||
179 | #define H_SET_VERSION(h,v) ((h)->header.a_info = ((H_GET_DYNAMIC(h) << 31) \ | |
180 | | ((v) << 24) \ | |
181 | | (H_GET_MACHTYPE(h) << 16) \ | |
182 | | (H_GET_MAGIC_NUMBER(h)))) | |
183 | ||
184 | #define H_SET_MACHTYPE(h,v) ((h)->header.a_info = ((H_GET_DYNAMIC(h) << 31) \ | |
185 | | (H_GET_VERSION(h) << 24) \ | |
186 | | ((v) << 16) \ | |
187 | | (H_GET_MAGIC_NUMBER(h)))) | |
188 | ||
189 | #define H_SET_MAGIC_NUMBER(h,v) ((h)->header.a_info = ((H_GET_DYNAMIC(h) << 31) \ | |
190 | | (H_GET_VERSION(h) << 24) \ | |
191 | | (H_GET_MACHTYPE(h) << 16) \ | |
192 | | ((v)))) | |
fecd2382 RP |
193 | |
194 | #define H_SET_TEXT_SIZE(h,v) ((h)->header.a_text = md_section_align(SEG_TEXT, (v))) | |
195 | #define H_SET_DATA_SIZE(h,v) ((h)->header.a_data = md_section_align(SEG_DATA, (v))) | |
196 | #define H_SET_BSS_SIZE(h,v) ((h)->header.a_bss = md_section_align(SEG_BSS, (v))) | |
197 | ||
198 | #define H_SET_RELOCATION_SIZE(h,t,d) (H_SET_TEXT_RELOCATION_SIZE((h),(t)),\ | |
199 | H_SET_DATA_RELOCATION_SIZE((h),(d))) | |
200 | ||
201 | #define H_SET_TEXT_RELOCATION_SIZE(h,v) ((h)->header.a_trsize = (v)) | |
202 | #define H_SET_DATA_RELOCATION_SIZE(h,v) ((h)->header.a_drsize = (v)) | |
def66e24 | 203 | #define H_SET_SYMBOL_TABLE_SIZE(h,v) ((h)->header.a_syms = (v) * 12) |
fecd2382 | 204 | |
fecd2382 RP |
205 | #define H_SET_ENTRY_POINT(h,v) ((h)->header.a_entry = (v)) |
206 | #define H_SET_STRING_SIZE(h,v) ((h)->string_table_size = (v)) | |
fecd2382 | 207 | |
def66e24 DM |
208 | typedef struct |
209 | { | |
210 | struct exec header; /* a.out header */ | |
211 | long string_table_size; /* names + '\0' + sizeof(int) */ | |
212 | } | |
fecd2382 | 213 | |
def66e24 | 214 | object_headers; |
fecd2382 RP |
215 | |
216 | /* line numbering stuff. */ | |
a39116f1 RP |
217 | #define OBJ_EMIT_LINENO(a, b, c) {;} |
218 | ||
a39116f1 | 219 | struct fix; |
def66e24 | 220 | void tc_aout_fix_to_chars PARAMS ((char *where, struct fix *fixP, relax_addressT segment_address)); |
fecd2382 | 221 | |
def66e24 DM |
222 | #endif |
223 | ||
224 | #define obj_symbol_new_hook(s) {;} | |
225 | ||
226 | #define EMIT_SECTION_SYMBOLS 0 | |
fecd2382 | 227 | |
9e396994 ILT |
228 | #define AOUT_STABS |
229 | ||
fecd2382 | 230 | /* end of obj-aout.h */ |