Commit | Line | Data |
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4f1d9bd8 NC |
1 | /* `a.out.adobe' differences from standard a.out files |
2 | ||
2571583a | 3 | Copyright (C) 2001-2017 Free Software Foundation, Inc. |
4f1d9bd8 NC |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
e4e42b45 | 7 | the Free Software Foundation; either version 3 of the License, or |
4f1d9bd8 | 8 | (at your option) any later version. |
e4e42b45 | 9 | |
4f1d9bd8 NC |
10 | This program is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
e4e42b45 | 14 | |
4f1d9bd8 NC |
15 | You should have received a copy of the GNU General Public License |
16 | along with this program; if not, write to the Free Software | |
e4e42b45 NC |
17 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
18 | MA 02110-1301, USA. */ | |
252b5132 RH |
19 | |
20 | #ifndef __A_OUT_ADOBE_H__ | |
21 | #define __A_OUT_ADOBE_H__ | |
22 | ||
23 | #define BYTES_IN_WORD 4 | |
24 | ||
25 | /* Struct external_exec is the same. */ | |
26 | ||
de194d85 | 27 | /* This is the layout on disk of the 32-bit or 64-bit exec header. */ |
252b5132 RH |
28 | |
29 | struct external_exec | |
30 | { | |
de194d85 YC |
31 | bfd_byte e_info[4]; /* Magic number and stuff. */ |
32 | bfd_byte e_text[BYTES_IN_WORD]; /* Length of text section in bytes. */ | |
33 | bfd_byte e_data[BYTES_IN_WORD]; /* Length of data section in bytes. */ | |
34 | bfd_byte e_bss[BYTES_IN_WORD]; /* Length of bss area in bytes. */ | |
35 | bfd_byte e_syms[BYTES_IN_WORD]; /* Length of symbol table in bytes. */ | |
36 | bfd_byte e_entry[BYTES_IN_WORD]; /* Start address. */ | |
37 | bfd_byte e_trsize[BYTES_IN_WORD]; /* Length of text relocation info. */ | |
38 | bfd_byte e_drsize[BYTES_IN_WORD]; /* Length of data relocation info. */ | |
252b5132 RH |
39 | }; |
40 | ||
41 | #define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7) | |
42 | ||
de194d85 | 43 | /* Magic numbers for a.out files. */ |
252b5132 RH |
44 | |
45 | #undef ZMAGIC | |
46 | #define ZMAGIC 0xAD0BE /* Cute, eh? */ | |
47 | #undef OMAGIC | |
48 | #undef NMAGIC | |
49 | ||
bbb1afc8 | 50 | #define N_BADMAG(x) ((x)->a_info != ZMAGIC) |
252b5132 RH |
51 | |
52 | /* By default, segment size is constant. But some machines override this | |
53 | to be a function of the a.out header (e.g. machine type). */ | |
54 | #ifndef N_SEGSIZE | |
55 | #define N_SEGSIZE(x) SEGMENT_SIZE | |
56 | #endif | |
57 | #undef N_SEGSIZE /* FIXMEXXXX */ | |
58 | ||
59 | /* Segment information for the a.out.Adobe format is specified after the | |
60 | file header. It contains N segment descriptors, followed by one with | |
61 | a type of zero. | |
62 | ||
63 | The actual text of the segments starts at N_TXTOFF in the file, | |
64 | regardless of how many or how few segment headers there are. */ | |
65 | ||
de194d85 YC |
66 | struct external_segdesc |
67 | { | |
68 | unsigned char e_type[1]; | |
69 | unsigned char e_size[3]; | |
70 | unsigned char e_virtbase[4]; | |
71 | unsigned char e_filebase[4]; | |
252b5132 RH |
72 | }; |
73 | ||
de194d85 YC |
74 | struct internal_segdesc |
75 | { | |
76 | unsigned int a_type:8; /* Segment type N_TEXT, N_DATA, 0. */ | |
77 | unsigned int a_size:24; /* Segment size. */ | |
78 | bfd_vma a_virtbase; /* Virtual address. */ | |
79 | unsigned int a_filebase; /* Base address in object file. */ | |
252b5132 RH |
80 | }; |
81 | ||
bbb1afc8 | 82 | #define N_TXTADDR(x) is_this_really_unused? |
252b5132 RH |
83 | |
84 | /* This is documented to be at 1024, but appears to really be at 2048. | |
85 | FIXME?! */ | |
86 | #define N_TXTOFF(x) 2048 | |
87 | ||
bbb1afc8 | 88 | #define N_TXTSIZE(x) ((x)->a_text) |
252b5132 | 89 | |
bbb1afc8 | 90 | #define N_DATADDR(x) is_this_really_unused? |
252b5132 | 91 | |
bbb1afc8 | 92 | #define N_BSSADDR(x) is_this_really_unused? |
252b5132 RH |
93 | |
94 | /* Offsets of the various portions of the file after the text segment. */ | |
95 | ||
96 | #define N_DATOFF(x) ( N_TXTOFF(x) + N_TXTSIZE(x) ) | |
bbb1afc8 AM |
97 | #define N_TRELOFF(x) ( N_DATOFF(x) + (x)->a_data ) |
98 | #define N_DRELOFF(x) ( N_TRELOFF(x) + (x)->a_trsize ) | |
99 | #define N_SYMOFF(x) ( N_DRELOFF(x) + (x)->a_drsize ) | |
100 | #define N_STROFF(x) ( N_SYMOFF(x) + (x)->a_syms ) | |
252b5132 | 101 | \f |
de194d85 YC |
102 | /* Symbols. */ |
103 | struct external_nlist | |
104 | { | |
105 | bfd_byte e_strx[BYTES_IN_WORD]; /* Index into string table of name. */ | |
106 | bfd_byte e_type[1]; /* Type of symbol. */ | |
107 | bfd_byte e_other[1]; /* Misc info (usually empty). */ | |
108 | bfd_byte e_desc[2]; /* Description field. */ | |
109 | bfd_byte e_value[BYTES_IN_WORD]; /* Value of symbol. */ | |
252b5132 RH |
110 | }; |
111 | ||
112 | #define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD) | |
113 | ||
de194d85 YC |
114 | struct internal_nlist |
115 | { | |
116 | unsigned long n_strx; /* Index into string table of name. */ | |
117 | unsigned char n_type; /* Type of symbol. */ | |
118 | unsigned char n_other; /* Misc info (usually empty). */ | |
119 | unsigned short n_desc; /* Description field. */ | |
120 | bfd_vma n_value; /* Value of symbol. */ | |
252b5132 RH |
121 | }; |
122 | ||
123 | /* The n_type field is the symbol type, containing: */ | |
124 | ||
de194d85 YC |
125 | #define N_UNDF 0 /* Undefined symbol. */ |
126 | #define N_ABS 2 /* Absolute symbol -- defined at particular addr. */ | |
127 | #define N_TEXT 4 /* Text sym -- defined at offset in text seg. */ | |
128 | #define N_DATA 6 /* Data sym -- defined at offset in data seg. */ | |
129 | #define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg. */ | |
130 | #define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink). */ | |
131 | #define N_FN 0x1f /* File name of .o file. */ | |
132 | #define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh). */ | |
252b5132 RH |
133 | /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT, |
134 | N_DATA, or N_BSS. When the low-order bit of other types is set, | |
135 | (e.g. N_WARNING versus N_FN), they are two different types. */ | |
de194d85 | 136 | #define N_EXT 1 /* External symbol (as opposed to local-to-this-file). */ |
252b5132 | 137 | #define N_TYPE 0x1e |
de194d85 | 138 | #define N_STAB 0xe0 /* If any of these bits are on, it's a debug symbol. */ |
252b5132 RH |
139 | |
140 | #define N_INDR 0x0a | |
141 | ||
142 | /* The following symbols refer to set elements. | |
143 | All the N_SET[ATDB] symbols with the same name form one set. | |
144 | Space is allocated for the set in the text section, and each set | |
145 | elements value is stored into one word of the space. | |
146 | The first word of the space is the length of the set (number of elements). | |
147 | ||
148 | The address of the set is made into an N_SETV symbol | |
149 | whose name is the same as the name of the set. | |
150 | This symbol acts like a N_DATA global symbol | |
151 | in that it can satisfy undefined external references. */ | |
152 | ||
153 | /* These appear as input to LD, in a .o file. */ | |
de194d85 YC |
154 | #define N_SETA 0x14 /* Absolute set element symbol. */ |
155 | #define N_SETT 0x16 /* Text set element symbol. */ | |
156 | #define N_SETD 0x18 /* Data set element symbol. */ | |
157 | #define N_SETB 0x1A /* Bss set element symbol. */ | |
252b5132 RH |
158 | |
159 | /* This is output from LD. */ | |
160 | #define N_SETV 0x1C /* Pointer to set vector in data area. */ | |
161 | ||
162 | /* Warning symbol. The text gives a warning message, the next symbol | |
163 | in the table will be undefined. When the symbol is referenced, the | |
164 | message is printed. */ | |
165 | ||
166 | #define N_WARNING 0x1e | |
167 | ||
168 | /* Relocations | |
169 | ||
170 | There are two types of relocation flavours for a.out systems, | |
171 | standard and extended. The standard form is used on systems where the | |
172 | instruction has room for all the bits of an offset to the operand, whilst | |
173 | the extended form is used when an address operand has to be split over n | |
174 | instructions. Eg, on the 68k, each move instruction can reference | |
175 | the target with a displacement of 16 or 32 bits. On the sparc, move | |
176 | instructions use an offset of 14 bits, so the offset is stored in | |
de194d85 | 177 | the reloc field, and the data in the section is ignored. */ |
252b5132 RH |
178 | |
179 | /* This structure describes a single relocation to be performed. | |
180 | The text-relocation section of the file is a vector of these structures, | |
181 | all of which apply to the text section. | |
182 | Likewise, the data-relocation section applies to the data section. */ | |
183 | ||
de194d85 YC |
184 | struct reloc_std_external |
185 | { | |
186 | bfd_byte r_address[BYTES_IN_WORD]; /* Offset of data to relocate. */ | |
187 | bfd_byte r_index[3]; /* Symbol table index of symbol. */ | |
188 | bfd_byte r_type[1]; /* Relocation type. */ | |
252b5132 RH |
189 | }; |
190 | ||
191 | #define RELOC_STD_BITS_PCREL_BIG 0x80 | |
192 | #define RELOC_STD_BITS_PCREL_LITTLE 0x01 | |
193 | ||
194 | #define RELOC_STD_BITS_LENGTH_BIG 0x60 | |
de194d85 | 195 | #define RELOC_STD_BITS_LENGTH_SH_BIG 5 /* To shift to units place. */ |
252b5132 RH |
196 | #define RELOC_STD_BITS_LENGTH_LITTLE 0x06 |
197 | #define RELOC_STD_BITS_LENGTH_SH_LITTLE 1 | |
198 | ||
199 | #define RELOC_STD_BITS_EXTERN_BIG 0x10 | |
200 | #define RELOC_STD_BITS_EXTERN_LITTLE 0x08 | |
201 | ||
202 | #define RELOC_STD_BITS_BASEREL_BIG 0x08 | |
203 | #define RELOC_STD_BITS_BASEREL_LITTLE 0x08 | |
204 | ||
205 | #define RELOC_STD_BITS_JMPTABLE_BIG 0x04 | |
206 | #define RELOC_STD_BITS_JMPTABLE_LITTLE 0x04 | |
207 | ||
208 | #define RELOC_STD_BITS_RELATIVE_BIG 0x02 | |
209 | #define RELOC_STD_BITS_RELATIVE_LITTLE 0x02 | |
210 | ||
de194d85 | 211 | #define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry. */ |
252b5132 RH |
212 | |
213 | struct reloc_std_internal | |
214 | { | |
215 | bfd_vma r_address; /* Address (within segment) to be relocated. */ | |
216 | /* The meaning of r_symbolnum depends on r_extern. */ | |
217 | unsigned int r_symbolnum:24; | |
218 | /* Nonzero means value is a pc-relative offset | |
219 | and it should be relocated for changes in its own address | |
220 | as well as for changes in the symbol or section specified. */ | |
221 | unsigned int r_pcrel:1; | |
222 | /* Length (as exponent of 2) of the field to be relocated. | |
223 | Thus, a value of 2 indicates 1<<2 bytes. */ | |
224 | unsigned int r_length:2; | |
225 | /* 1 => relocate with value of symbol. | |
226 | r_symbolnum is the index of the symbol | |
227 | in files the symbol table. | |
228 | 0 => relocate with the address of a segment. | |
229 | r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS | |
230 | (the N_EXT bit may be set also, but signifies nothing). */ | |
231 | unsigned int r_extern:1; | |
232 | /* The next three bits are for SunOS shared libraries, and seem to | |
233 | be undocumented. */ | |
de194d85 YC |
234 | unsigned int r_baserel:1; /* Linkage table relative. */ |
235 | unsigned int r_jmptable:1; /* pc-relative to jump table. */ | |
236 | unsigned int r_relative:1; /* "relative relocation". */ | |
252b5132 | 237 | /* unused */ |
de194d85 | 238 | unsigned int r_pad:1; /* Padding -- set to zero. */ |
252b5132 RH |
239 | }; |
240 | ||
241 | ||
242 | /* EXTENDED RELOCS */ | |
243 | ||
de194d85 YC |
244 | struct reloc_ext_external |
245 | { | |
246 | bfd_byte r_address[BYTES_IN_WORD]; /* Offset of data to relocate. */ | |
247 | bfd_byte r_index[3]; /* Symbol table index of symbol. */ | |
248 | bfd_byte r_type[1]; /* Relocation type. */ | |
249 | bfd_byte r_addend[BYTES_IN_WORD]; /* Datum addend. */ | |
252b5132 RH |
250 | }; |
251 | ||
252 | #define RELOC_EXT_BITS_EXTERN_BIG 0x80 | |
253 | #define RELOC_EXT_BITS_EXTERN_LITTLE 0x01 | |
254 | ||
255 | #define RELOC_EXT_BITS_TYPE_BIG 0x1F | |
256 | #define RELOC_EXT_BITS_TYPE_SH_BIG 0 | |
257 | #define RELOC_EXT_BITS_TYPE_LITTLE 0xF8 | |
258 | #define RELOC_EXT_BITS_TYPE_SH_LITTLE 3 | |
259 | ||
260 | /* Bytes per relocation entry */ | |
261 | #define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD) | |
262 | ||
263 | enum reloc_type | |
264 | { | |
de194d85 | 265 | /* Simple relocations. */ |
252b5132 RH |
266 | RELOC_8, /* data[0:7] = addend + sv */ |
267 | RELOC_16, /* data[0:15] = addend + sv */ | |
268 | RELOC_32, /* data[0:31] = addend + sv */ | |
de194d85 | 269 | /* PC-rel displacement. */ |
252b5132 RH |
270 | RELOC_DISP8, /* data[0:7] = addend - pc + sv */ |
271 | RELOC_DISP16, /* data[0:15] = addend - pc + sv */ | |
272 | RELOC_DISP32, /* data[0:31] = addend - pc + sv */ | |
de194d85 | 273 | /* Special. */ |
252b5132 RH |
274 | RELOC_WDISP30, /* data[0:29] = (addend + sv - pc)>>2 */ |
275 | RELOC_WDISP22, /* data[0:21] = (addend + sv - pc)>>2 */ | |
276 | RELOC_HI22, /* data[0:21] = (addend + sv)>>10 */ | |
277 | RELOC_22, /* data[0:21] = (addend + sv) */ | |
278 | RELOC_13, /* data[0:12] = (addend + sv) */ | |
279 | RELOC_LO10, /* data[0:9] = (addend + sv) */ | |
280 | RELOC_SFA_BASE, | |
281 | RELOC_SFA_OFF13, | |
de194d85 YC |
282 | /* P.I.C. (base-relative). */ |
283 | RELOC_BASE10, /* Not sure - maybe we can do this the */ | |
284 | RELOC_BASE13, /* right way now. */ | |
252b5132 | 285 | RELOC_BASE22, |
de194d85 | 286 | /* For some sort of pc-rel P.I.C. (?) */ |
252b5132 RH |
287 | RELOC_PC10, |
288 | RELOC_PC22, | |
de194d85 | 289 | /* P.I.C. jump table. */ |
252b5132 | 290 | RELOC_JMP_TBL, |
de194d85 | 291 | /* Reputedly for shared libraries somehow. */ |
252b5132 RH |
292 | RELOC_SEGOFF16, |
293 | RELOC_GLOB_DAT, | |
294 | RELOC_JMP_SLOT, | |
295 | RELOC_RELATIVE, | |
296 | ||
297 | RELOC_11, | |
298 | RELOC_WDISP2_14, | |
299 | RELOC_WDISP19, | |
300 | RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */ | |
301 | RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */ | |
302 | ||
303 | /* 29K relocation types */ | |
304 | RELOC_JUMPTARG, | |
305 | RELOC_CONST, | |
306 | RELOC_CONSTH, | |
307 | ||
308 | NO_RELOC | |
de194d85 | 309 | }; |
252b5132 | 310 | |
de194d85 YC |
311 | struct reloc_internal |
312 | { | |
313 | bfd_vma r_address; /* Offset of data to relocate. */ | |
314 | long r_index; /* Symbol table index of symbol. */ | |
315 | enum reloc_type r_type; /* Relocation type. */ | |
316 | bfd_vma r_addend; /* Datum addend. */ | |
252b5132 RH |
317 | }; |
318 | ||
de194d85 | 319 | #endif /* __A_OUT_ADOBE_H__ */ |