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3c3bdf30 NC |
1 | /* BFD back-end for mmo objects (MMIX-specific object-format). |
2 | Copyright 2001 | |
3 | Free Software Foundation, Inc. | |
4 | Written by Hans-Peter Nilsson (hp@bitrange.com). | |
5 | Infrastructure and other bits originally copied from srec.c and | |
6 | binary.c. | |
7 | ||
8 | This file is part of BFD, the Binary File Descriptor library. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
23 | ||
24 | /* | |
25 | SECTION | |
26 | mmo backend | |
27 | ||
28 | The mmo object format is used exclusively together with Professor | |
29 | Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator | |
6eeb40b2 HPN |
30 | @command{mmix} which is available at |
31 | @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz} | |
3c3bdf30 | 32 | understands this format. That package also includes a combined |
6eeb40b2 | 33 | assembler and linker called @command{mmixal}. The mmo format has |
3c3bdf30 NC |
34 | no advantages feature-wise compared to e.g. ELF. It is a simple |
35 | non-relocatable object format with no support for archives or | |
36 | debugging information, except for symbol value information and | |
37 | line numbers (which is not yet implemented in BFD). See | |
6eeb40b2 | 38 | @url{http://www-cs-faculty.stanford.edu/~knuth/mmix.html} for more |
3c3bdf30 NC |
39 | information about MMIX. The ELF format is used for intermediate |
40 | object files in the BFD implementation. | |
41 | ||
42 | @c We want to xref the symbol table node. A feature in "chew" | |
43 | @c requires that "commands" do not contain spaces in the | |
44 | @c arguments. Hence the hyphen in "Symbol-table". | |
45 | @menu | |
46 | @* File layout:: | |
47 | @* Symbol-table:: | |
48 | @* mmo section mapping:: | |
49 | @end menu | |
50 | ||
51 | INODE | |
52 | File layout, Symbol-table, mmo, mmo | |
53 | SUBSECTION | |
54 | File layout | |
55 | ||
56 | The mmo file contents is not partitioned into named sections as | |
57 | with e.g.@: ELF. Memory areas is formed by specifying the | |
58 | location of the data that follows. Only the memory area | |
59 | @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so | |
60 | it is used for code (and constants) and the area | |
61 | @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for | |
62 | writable data. @xref{mmo section mapping}. | |
63 | ||
64 | Contents is entered as 32-bit words, xor:ed over previous | |
65 | contents, always zero-initialized. A word that starts with the | |
66 | byte @samp{0x98} forms a command called a @samp{lopcode}, where | |
67 | the next byte distinguished between the thirteen lopcodes. The | |
68 | two remaining bytes, called the @samp{Y} and @samp{Z} fields, or | |
69 | the @samp{YZ} field (a 16-bit big-endian number), are used for | |
70 | various purposes different for each lopcode. As documented in | |
6eeb40b2 | 71 | @url{http://www-cs-faculty.stanford.edu/~knuth/mmixal-intro.ps.gz}, |
3c3bdf30 NC |
72 | the lopcodes are: |
73 | ||
74 | There is provision for specifying ``special data'' of 65536 | |
75 | different types. We use type 80 (decimal), arbitrarily chosen the | |
76 | same as the ELF <<e_machine>> number for MMIX, filling it with | |
77 | section information normally found in ELF objects. @xref{mmo | |
78 | section mapping}. | |
79 | ||
80 | @table @code | |
81 | @item lop_quote | |
82 | 0x98000001. The next word is contents, regardless of whether it | |
83 | starts with 0x98 or not. | |
84 | ||
85 | @item lop_loc | |
86 | 0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location | |
87 | directive, setting the location for the next data to the next | |
88 | 32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}), | |
89 | plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment | |
90 | and 2 for the data segment. | |
91 | ||
92 | @item lop_skip | |
93 | 0x9802YYZZ. Increase the current location by @samp{YZ} bytes. | |
94 | ||
95 | @item lop_fixo | |
96 | 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location | |
97 | as 64 bits into the location pointed to by the next 32-bit | |
98 | (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y * | |
99 | 2^56}. | |
100 | ||
101 | @item lop_fixr | |
102 | 0x9804YYZZ. @samp{YZ} is stored into the current location plus | |
103 | @math{2 - 4 * YZ}. | |
104 | ||
105 | @item lop_fixrx | |
106 | 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from | |
107 | the following 32-bit word are used in a manner similar to | |
108 | @samp{YZ} in lop_fixr: it is xor:ed into the current location | |
109 | minus @math{4 * L}. The first byte of the word is 0 or 1. If it | |
110 | is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0, | |
111 | then @math{L = (@var{lowest 24 bits of word})}. | |
112 | ||
113 | @item lop_file | |
114 | 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of | |
115 | 32-bit words. Set the file number to @samp{Y} and the line | |
116 | counter to 0. The next @math{Z * 4} bytes contain the file name, | |
117 | padded with zeros if the count is not a multiple of four. The | |
118 | same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for | |
119 | all but the first occurrence. | |
120 | ||
121 | @item lop_line | |
122 | 0x9807YYZZ. @samp{YZ} is the line number. Together with | |
123 | lop_file, it forms the source location for the next 32-bit word. | |
124 | Note that for each non-lopcode 32-bit word, line numbers are | |
125 | assumed incremented by one. | |
126 | ||
127 | @item lop_spec | |
128 | 0x9808YYZZ. @samp{YZ} is the type number. Data until the next | |
129 | lopcode other than lop_quote forms special data of type @samp{YZ}. | |
130 | @xref{mmo section mapping}. | |
131 | ||
132 | Other types than 80, (or type 80 with a content that does not | |
133 | parse) is stored in sections named <<.MMIX.spec_data.@var{n}>> | |
134 | where @var{n} is the @samp{YZ}-type. The flags for such a | |
135 | sections say not to allocate or load the data. The vma is 0. | |
136 | Contents of multiple occurrences of special data @var{n} is | |
137 | concatenated to the data of the previous lop_spec @var{n}s. The | |
138 | location in data or code at which the lop_spec occurred is lost. | |
139 | ||
140 | @item lop_pre | |
141 | 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the | |
142 | length of header information in 32-bit words, where the first word | |
143 | tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}. | |
144 | ||
145 | @item lop_post | |
146 | 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all | |
147 | content-generating lopcodes in a program. The @samp{Z} field | |
148 | denotes the value of @samp{rG} at the beginning of the program. | |
149 | The following @math{256 - Z} big-endian 64-bit words are loaded | |
150 | into global registers @samp{$G} @dots{} @samp{$255}. | |
151 | ||
152 | @item lop_stab | |
153 | 0x980b0000. The next-to-last lopcode in a program. Must follow | |
154 | immediately after the lop_post lopcode and its data. After this | |
155 | lopcode follows all symbols in a compressed format | |
156 | (@pxref{Symbol-table}). | |
157 | ||
158 | @item lop_end | |
159 | 0x980cYYZZ. The last lopcode in a program. It must follow the | |
160 | lop_stab lopcode and its data. The @samp{YZ} field contains the | |
161 | number of 32-bit words of symbol table information after the | |
162 | preceding lop_stab lopcode. | |
163 | @end table | |
164 | ||
165 | Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and | |
166 | <<lop_fixo>> are not generated by BFD, but are handled. They are | |
167 | generated by <<mmixal>>. | |
168 | ||
169 | EXAMPLE | |
170 | This trivial one-label, one-instruction file: | |
171 | ||
172 | | :Main TRAP 1,2,3 | |
173 | ||
174 | can be represented this way in mmo: | |
175 | ||
176 | | 0x98090101 - lop_pre, one 32-bit word with timestamp. | |
177 | | <timestamp> | |
178 | | 0x98010002 - lop_loc, text segment, using a 64-bit address. | |
179 | | Note that mmixal does not emit this for the file above. | |
180 | | 0x00000000 - Address, high 32 bits. | |
181 | | 0x00000000 - Address, low 32 bits. | |
182 | | 0x98060002 - lop_file, 2 32-bit words for file-name. | |
183 | | 0x74657374 - "test" | |
184 | | 0x2e730000 - ".s\0\0" | |
185 | | 0x98070001 - lop_line, line 1. | |
186 | | 0x00010203 - TRAP 1,2,3 | |
187 | | 0x980a00ff - lop_post, setting $255 to 0. | |
188 | | 0x00000000 | |
189 | | 0x00000000 | |
190 | | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. | |
191 | | 0x203a4040 @xref{Symbol-table}. | |
192 | | 0x10404020 | |
193 | | 0x4d206120 | |
194 | | 0x69016e00 | |
195 | | 0x81000000 | |
196 | | 0x980c0005 - lop_end; symbol table contained five 32-bit words. */ | |
197 | ||
198 | #include "bfd.h" | |
199 | #include "sysdep.h" | |
200 | #include "libbfd.h" | |
201 | #include "libiberty.h" | |
202 | #include "elf/mmix.h" | |
203 | #include "opcode/mmix.h" | |
204 | #include <ctype.h> | |
205 | ||
206 | #define LOP 0x98 | |
207 | #define LOP_QUOTE 0 | |
208 | #define LOP_LOC 1 | |
209 | #define LOP_SKIP 2 | |
210 | #define LOP_FIXO 3 | |
211 | #define LOP_FIXR 4 | |
212 | #define LOP_FIXRX 5 | |
213 | #define LOP_FILE 6 | |
214 | #define LOP_LINE 7 | |
215 | #define LOP_SPEC 8 | |
216 | #define LOP_PRE 9 | |
217 | #define LOP_POST 10 | |
218 | #define LOP_STAB 11 | |
219 | #define LOP_END 12 | |
220 | ||
221 | #define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1) | |
222 | #define SPEC_DATA_SECTION 80 | |
223 | #define LOP_SPEC_SECTION \ | |
224 | ((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION) | |
225 | ||
226 | /* Must be a power of two. If you change this to be >= 64k, you need a | |
227 | new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */ | |
228 | #define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15) | |
229 | ||
230 | /* An arbitrary number for the maximum length section name size. */ | |
231 | #define MAX_SECTION_NAME_SIZE (1024 * 1024) | |
232 | ||
233 | /* A quite arbitrary number for the maximum length section size. */ | |
234 | #define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024) | |
235 | ||
236 | #define MMO3_WCHAR 0x80 | |
237 | #define MMO3_LEFT 0x40 | |
238 | #define MMO3_MIDDLE 0x20 | |
239 | #define MMO3_RIGHT 0x10 | |
240 | #define MMO3_TYPEBITS 0xf | |
241 | #define MMO3_REGQUAL_BITS 0xf | |
242 | #define MMO3_UNDEF 2 | |
243 | #define MMO3_DATA 8 | |
244 | #define MMO3_SYMBITS 0x2f | |
245 | ||
246 | /* Put these everywhere in new code. */ | |
247 | #define FATAL_DEBUG \ | |
248 | _bfd_abort (__FILE__, __LINE__, \ | |
249 | "Internal: Non-debugged code (test-case missing)") | |
250 | ||
251 | #define BAD_CASE(x) \ | |
252 | _bfd_abort (__FILE__, __LINE__, \ | |
253 | "bad case for " #x) | |
254 | ||
255 | enum mmo_sym_type { mmo_reg_sym, mmo_undef_sym, mmo_data_sym, mmo_abs_sym}; | |
256 | ||
257 | /* When scanning the mmo file, a linked list of mmo_symbol | |
258 | structures is built to represent the symbol table (if there is | |
259 | one). */ | |
260 | ||
261 | struct mmo_symbol | |
262 | { | |
263 | struct mmo_symbol *next; | |
264 | CONST char *name; | |
265 | bfd_vma value; | |
266 | enum mmo_sym_type sym_type; | |
267 | unsigned int serno; | |
268 | }; | |
269 | ||
270 | struct mmo_data_list_struct | |
271 | { | |
272 | struct mmo_data_list_struct *next; | |
273 | bfd_vma where; | |
274 | bfd_size_type size; | |
275 | bfd_size_type allocated_size; | |
276 | bfd_byte data[1]; | |
277 | }; | |
278 | ||
279 | typedef struct mmo_data_list_struct mmo_data_list_type; | |
280 | ||
281 | struct mmo_symbol_trie | |
282 | { | |
283 | struct mmo_symbol_trie *left; | |
284 | struct mmo_symbol_trie *right; | |
285 | struct mmo_symbol_trie *middle; | |
286 | ||
287 | bfd_byte symchar; | |
288 | ||
289 | /* A zero name means there's nothing here. */ | |
290 | struct mmo_symbol sym; | |
291 | }; | |
292 | ||
293 | /* The mmo tdata information. */ | |
294 | ||
295 | struct mmo_data_struct | |
296 | { | |
297 | struct mmo_symbol *symbols; | |
298 | struct mmo_symbol *symtail; | |
299 | asymbol *csymbols; | |
300 | ||
301 | /* File representation of time (NULL) when this file was created. */ | |
302 | bfd_byte created[4]; | |
303 | ||
304 | /* When we're reading bytes recursively, check this occasionally. | |
305 | Also holds write errors. */ | |
306 | boolean have_error; | |
307 | ||
308 | /* Max symbol length that may appear in the lop_stab table. Note that | |
309 | this table might just hold a subset of symbols for not-really large | |
310 | programs, as it can only be 65536 * 4 bytes large. */ | |
311 | int max_symbol_length; | |
312 | ||
313 | /* Here's the symbol we build in lop_stab. */ | |
314 | char *lop_stab_symbol; | |
315 | ||
316 | /* Index into lop_stab_symbol for the next character when parsing the | |
317 | symbol information. */ | |
318 | int symbol_position; | |
319 | ||
320 | /* When creating arbitrary sections, we need to count section numbers. */ | |
321 | int sec_no; | |
322 | ||
323 | /* When writing or reading byte-wise, we need to count the bytes | |
324 | within a 32-bit word. */ | |
325 | int byte_no; | |
326 | ||
327 | /* We also need a buffer to hold the bytes we count reading or writing. */ | |
328 | bfd_byte buf[4]; | |
329 | }; | |
330 | ||
331 | typedef struct mmo_data_struct tdata_type; | |
332 | ||
333 | struct mmo_section_data_struct | |
334 | { | |
335 | mmo_data_list_type *head; | |
336 | mmo_data_list_type *tail; | |
337 | }; | |
338 | ||
339 | /* These structures are used in bfd_map_over_sections constructs. */ | |
340 | ||
341 | /* Used when writing out sections; all but the register contents section | |
342 | which is stored in reg_section. */ | |
343 | struct mmo_write_sec_info | |
344 | { | |
345 | asection *reg_section; | |
346 | boolean retval; | |
347 | }; | |
348 | ||
349 | /* Used when trying to find a section corresponding to addr. */ | |
350 | struct mmo_find_sec_info | |
351 | { | |
352 | asection *sec; | |
353 | bfd_vma addr; | |
354 | }; | |
355 | ||
356 | static boolean mmo_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *)); | |
357 | static void mmo_write_section_unless_reg_contents | |
358 | PARAMS ((bfd *, asection *, PTR)); | |
359 | static void mmo_find_sec_w_addr PARAMS ((bfd *, asection *, PTR)); | |
360 | static void mmo_find_sec_w_addr_grow PARAMS ((bfd *, asection *, PTR)); | |
361 | static asection *mmo_make_section PARAMS ((bfd *, CONST char *)); | |
362 | static void mmo_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *)); | |
363 | static void mmo_print_symbol | |
364 | PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type)); | |
365 | static void mmo_init PARAMS ((void)); | |
366 | static boolean mmo_mkobject PARAMS ((bfd *)); | |
367 | static boolean mmo_scan PARAMS ((bfd *)); | |
368 | static asection *mmo_decide_section PARAMS ((bfd *, bfd_vma)); | |
369 | static asection *mmo_get_generic_spec_data_section PARAMS ((bfd *, int)); | |
370 | static asection *mmo_get_spec_section PARAMS ((bfd *, int)); | |
371 | static INLINE bfd_byte *mmo_get_loc PARAMS ((asection *, bfd_vma, int)); | |
372 | static void mmo_xore_64 PARAMS ((asection *, bfd_vma vma, bfd_vma value)); | |
373 | static void mmo_xore_32 PARAMS ((asection *, bfd_vma vma, unsigned int)); | |
374 | static void mmo_xore_16 PARAMS ((asection *, bfd_vma vma, unsigned int)); | |
375 | static CONST bfd_target *mmo_object_p PARAMS ((bfd *)); | |
376 | static void mmo_map_set_sizes PARAMS ((bfd *, asection *, PTR)); | |
377 | static boolean mmo_get_symbols PARAMS ((bfd *)); | |
378 | static boolean mmo_create_symbol PARAMS ((bfd *, CONST char *, bfd_vma, | |
379 | enum mmo_sym_type, unsigned int)); | |
380 | static boolean mmo_get_section_contents | |
381 | PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type)); | |
382 | static long mmo_get_symtab_upper_bound PARAMS ((bfd *)); | |
383 | static long mmo_get_symtab PARAMS ((bfd *, asymbol **)); | |
384 | static asymbol *mmo_make_empty_symbol PARAMS ((bfd *)); | |
385 | static void mmo_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *)); | |
386 | static void mmo_print_symbol PARAMS ((bfd *, PTR, asymbol *, | |
387 | bfd_print_symbol_type)); | |
388 | static boolean mmo_set_section_contents | |
389 | PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type)); | |
390 | static int mmo_sizeof_headers PARAMS ((bfd *, boolean)); | |
391 | static long mmo_get_reloc_upper_bound PARAMS ((bfd *, asection *)); | |
392 | ||
393 | static boolean mmo_internal_write_header PARAMS ((bfd *)); | |
394 | static boolean mmo_internal_write_post PARAMS ((bfd *, int, asection *)); | |
395 | static boolean mmo_internal_add_3_sym | |
396 | PARAMS ((bfd *, struct mmo_symbol_trie *, CONST struct mmo_symbol *)); | |
397 | static unsigned int mmo_internal_3_length | |
398 | PARAMS ((bfd *, struct mmo_symbol_trie *)); | |
399 | static void mmo_internal_3_dump | |
400 | PARAMS ((bfd *, struct mmo_symbol_trie *)); | |
401 | static void mmo_beb128_out PARAMS ((bfd *, int, int)); | |
402 | static boolean mmo_internal_write_section | |
403 | PARAMS ((bfd *, asection *)); | |
404 | static void mmo_write_tetra PARAMS ((bfd *, unsigned int)); | |
405 | static void mmo_write_tetra_raw PARAMS ((bfd *, unsigned int)); | |
406 | static void mmo_write_octa PARAMS ((bfd *, bfd_vma)); | |
407 | static void mmo_write_octa_raw PARAMS ((bfd *, bfd_vma)); | |
408 | static boolean mmo_write_chunk | |
409 | PARAMS ((bfd *, CONST bfd_byte *, unsigned int)); | |
410 | static boolean mmo_write_loc_chunk | |
411 | PARAMS ((bfd *, bfd_vma, CONST bfd_byte *, unsigned int)); | |
412 | static boolean mmo_write_chunk_list PARAMS ((bfd *, mmo_data_list_type *)); | |
413 | static boolean mmo_write_loc_chunk_list | |
414 | PARAMS ((bfd *, mmo_data_list_type *)); | |
415 | static boolean mmo_write_symbols_and_terminator PARAMS ((bfd *)); | |
416 | static flagword mmo_sec_flags_from_bfd_flags PARAMS ((flagword)); | |
417 | static flagword bfd_sec_flags_from_mmo_flags PARAMS ((flagword)); | |
418 | static bfd_byte mmo_get_byte PARAMS ((bfd *)); | |
419 | static void mmo_write_byte PARAMS ((bfd *, bfd_byte)); | |
420 | static boolean mmo_new_section_hook PARAMS ((bfd *, asection *)); | |
421 | static int mmo_sort_mmo_symbols PARAMS ((CONST PTR, CONST PTR)); | |
422 | static boolean mmo_write_object_contents PARAMS ((bfd *)); | |
423 | static long mmo_canonicalize_reloc | |
424 | PARAMS ((bfd *, sec_ptr, arelent **, asymbol **)); | |
425 | ||
426 | /* Global "const" variables initialized once. Must not depend on | |
427 | particular input or caller; put such things into the bfd or elsewhere. | |
428 | Look ma, no static per-invocation data! */ | |
429 | ||
430 | static unsigned | |
431 | char valid_mmo_symbol_character_set[/* A-Z a-z (we assume consecutive | |
432 | codes; sorry EBCDIC:ers!). */ | |
433 | + 'Z' - 'A' + 1 + 'z' - 'a' + 1 | |
434 | /* Digits. */ | |
435 | + 10 | |
436 | /* ':' and '_'. */ | |
437 | + 1 + 1 | |
438 | /* Codes higher than 126. */ | |
439 | + 256 - 126 | |
440 | /* Ending zero. */ | |
441 | + 1]; | |
442 | ||
443 | ||
444 | /* Get section SECNAME or create one if it doesn't exist. When creating | |
445 | one, new memory for the name is allocated. */ | |
446 | ||
447 | static asection * | |
448 | mmo_make_section (abfd, secname) | |
449 | bfd *abfd; | |
450 | CONST char *secname; | |
451 | { | |
452 | asection *sec = bfd_get_section_by_name (abfd, secname); | |
453 | ||
454 | if (sec == NULL) | |
455 | { | |
456 | char *newsecname = strdup (secname); | |
457 | ||
458 | if (newsecname == NULL) | |
459 | { | |
460 | (*_bfd_error_handler) | |
461 | (_("%s: No core to allocate section name %s\n"), | |
462 | bfd_get_filename (abfd), secname); | |
463 | bfd_set_error (bfd_error_system_call); | |
464 | return NULL; | |
465 | } | |
466 | sec = bfd_make_section (abfd, newsecname); | |
467 | } | |
468 | ||
469 | return sec; | |
470 | } | |
471 | ||
472 | /* Nothing to do, but keep as a placeholder if we need it. | |
473 | Note that state that might differ between bfd:s must not be initialized | |
474 | here, nor must it be static. Add it to tdata information instead. */ | |
475 | ||
476 | static void | |
477 | mmo_init () | |
478 | { | |
479 | static boolean inited = false; | |
480 | int i = 0; | |
481 | int j = 0; | |
482 | static const char letters[] | |
483 | = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789:_"; | |
484 | ||
485 | if (inited == false) | |
486 | { | |
487 | inited = true; | |
488 | } | |
489 | ||
490 | /* Fill in the set of valid symbol characters. */ | |
491 | strcpy (valid_mmo_symbol_character_set, letters); | |
492 | i = strlen (letters); | |
493 | ||
494 | for (j = 126; j < 256; j++) | |
495 | valid_mmo_symbol_character_set[i++] = j; | |
496 | } | |
497 | ||
498 | /* Check whether an existing file is an mmo file. */ | |
499 | ||
500 | static CONST bfd_target * | |
501 | mmo_object_p (abfd) | |
502 | bfd *abfd; | |
503 | { | |
504 | struct stat statbuf; | |
505 | bfd_byte b[4]; | |
506 | ||
507 | mmo_init (); | |
508 | ||
509 | if (bfd_stat (abfd, &statbuf) < 0 | |
510 | || bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 | |
511 | || bfd_bread (b, 4, abfd) != 4) | |
512 | goto bad_final; | |
513 | ||
514 | /* All mmo files are a multiple of four bytes long. | |
515 | Only recognize version one. */ | |
516 | if ((statbuf.st_size % 4) != 0 | |
517 | || b[0] != LOP || b[1] != LOP_PRE || b[2] != 1) | |
518 | goto bad_format; | |
519 | ||
520 | /* Get the last 32-bit word. */ | |
521 | if (bfd_seek (abfd, (file_ptr) statbuf.st_size - 4, SEEK_SET) != 0 | |
522 | || bfd_bread (b, 4, abfd) != 4) | |
523 | goto bad_final; | |
524 | ||
525 | /* Check if the file ends in a lop_end lopcode. */ | |
526 | if (b[0] != LOP || b[1] != LOP_END || ! mmo_mkobject (abfd)) | |
527 | goto bad_format; | |
528 | ||
529 | /* Compute an upper bound on the max symbol length. Not really | |
530 | important as all of the symbol information can only be 256k. */ | |
531 | abfd->tdata.mmo_data->max_symbol_length = (b[2] * 256 + b[3]) * 4; | |
532 | abfd->tdata.mmo_data->lop_stab_symbol | |
533 | = bfd_malloc (abfd->tdata.mmo_data->max_symbol_length + 1); | |
534 | ||
535 | if (abfd->tdata.mmo_data->lop_stab_symbol == NULL) | |
536 | { | |
537 | (*_bfd_error_handler) | |
538 | (_("%s: No core to allocate a symbol %d bytes long\n"), | |
539 | bfd_get_filename (abfd), abfd->tdata.mmo_data->max_symbol_length); | |
540 | goto bad_final; | |
541 | } | |
542 | ||
543 | /* Read in everything. */ | |
544 | if (! mmo_scan (abfd)) | |
545 | goto bad_format_free; | |
546 | ||
547 | if (abfd->symcount > 0) | |
548 | abfd->flags |= HAS_SYMS; | |
549 | ||
550 | /* You'll have to tweak this if you want to use this format for other | |
551 | arches (not recommended due to its small-size limitations). Look at | |
552 | the ELF format for how to make it target-generic. */ | |
553 | if (! bfd_default_set_arch_mach (abfd, bfd_arch_mmix, 0)) | |
554 | goto bad_format_free; | |
555 | ||
556 | return abfd->xvec; | |
557 | ||
558 | bad_format_free: | |
559 | free (abfd->tdata.mmo_data->lop_stab_symbol); | |
560 | bad_format: | |
561 | bfd_set_error (bfd_error_wrong_format); | |
562 | bad_final: | |
563 | return NULL; | |
564 | } | |
565 | ||
566 | /* Set up the mmo tdata information. */ | |
567 | ||
568 | static boolean | |
569 | mmo_mkobject (abfd) | |
570 | bfd *abfd; | |
571 | { | |
572 | mmo_init (); | |
573 | ||
574 | if (abfd->tdata.mmo_data == NULL) | |
575 | { | |
576 | time_t created; | |
577 | ||
578 | /* All fields are zero-initialized, so we don't have to explicitly | |
579 | initialize most. */ | |
580 | tdata_type *tdata = (tdata_type *) bfd_zmalloc (sizeof (tdata_type)); | |
581 | if (tdata == NULL) | |
582 | return false; | |
583 | ||
584 | created = time (NULL); | |
585 | bfd_put_32 (abfd, created, tdata->created); | |
586 | ||
587 | abfd->tdata.mmo_data = tdata; | |
588 | } | |
589 | ||
590 | return true; | |
591 | } | |
592 | ||
593 | static boolean | |
594 | mmo_bfd_copy_private_bfd_data (ibfd, obfd) | |
595 | bfd *ibfd; | |
596 | bfd *obfd; | |
597 | { | |
598 | if (bfd_get_flavour (ibfd) != bfd_target_mmo_flavour | |
599 | || bfd_get_flavour (obfd) != bfd_target_mmo_flavour) | |
600 | return true; | |
601 | ||
602 | /* Copy the time the copied-from file was created. If people want the | |
603 | time the file was last *modified*, they have that in the normal file | |
604 | information. */ | |
605 | memcpy (obfd->tdata.mmo_data->created, ibfd->tdata.mmo_data->created, | |
606 | sizeof (obfd->tdata.mmo_data->created)); | |
607 | return true; | |
608 | } | |
609 | ||
610 | /* Helper functions for mmo_decide_section, used through | |
611 | bfd_map_over_sections. */ | |
612 | ||
613 | static void | |
614 | mmo_find_sec_w_addr (abfd, sec, p) | |
615 | bfd *abfd ATTRIBUTE_UNUSED; | |
616 | asection *sec; | |
617 | PTR p; | |
618 | { | |
619 | struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; | |
620 | bfd_vma vma = bfd_get_section_vma (abfd, sec); | |
621 | ||
622 | /* Ignore sections that aren't loaded. */ | |
623 | if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) | |
624 | != (SEC_LOAD | SEC_ALLOC)) | |
625 | return; | |
626 | ||
627 | if (infop->addr >= vma && infop->addr < vma + sec->_raw_size) | |
628 | infop->sec = sec; | |
629 | } | |
630 | ||
631 | static void | |
632 | mmo_find_sec_w_addr_grow (abfd, sec, p) | |
633 | bfd *abfd ATTRIBUTE_UNUSED; | |
634 | asection *sec; | |
635 | PTR p; | |
636 | { | |
637 | struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; | |
638 | bfd_vma vma = bfd_get_section_vma (abfd, sec); | |
639 | ||
640 | /* Ignore sections that aren't loaded. */ | |
641 | if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) | |
642 | != (SEC_LOAD | SEC_ALLOC)) | |
643 | return; | |
644 | ||
645 | if (infop->addr >= vma && infop->addr < vma + MAX_ARTIFICIAL_SECTION_SIZE) | |
646 | infop->sec = sec; | |
647 | } | |
648 | ||
649 | /* Find a section that corresponds to a VMA. Automatically create .text | |
650 | or .data and set current section to it, depending on what vma. If we | |
651 | can't deduce a section, make one up as ".MMIX.sec.N", where N is an | |
652 | increasing number. */ | |
653 | ||
654 | static asection * | |
655 | mmo_decide_section (abfd, vma) | |
656 | bfd *abfd; | |
657 | bfd_vma vma; | |
658 | { | |
659 | asection *sec = NULL; | |
660 | char sec_name[sizeof (".MMIX.sec.") + 20]; | |
661 | struct mmo_find_sec_info info; | |
662 | ||
663 | info.addr = vma; | |
664 | info.sec = NULL; | |
665 | ||
666 | /* First see if there's a section that would match exactly. */ | |
667 | bfd_map_over_sections (abfd, mmo_find_sec_w_addr, &info); | |
668 | ||
669 | if (info.sec != NULL) | |
670 | return info.sec; | |
671 | ||
672 | /* If there's no such section, try and expand one of the existing ones, | |
673 | up to a limit. Make sure we have .text and .data before we try that; | |
674 | create them corresponding to expected addresses and set flags to make | |
675 | them match the "loaded and with contents" expectation. */ | |
676 | if ((vma >> 56) == 0) | |
677 | { | |
678 | sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); | |
679 | ||
680 | if (sec == NULL) | |
681 | return NULL; | |
682 | ||
683 | if (! sec->user_set_vma) | |
684 | bfd_set_section_vma (abfd, sec, vma); | |
685 | if (! bfd_set_section_flags (abfd, sec, | |
686 | bfd_get_section_flags (abfd, sec) | |
687 | | SEC_CODE | SEC_LOAD | SEC_ALLOC)) | |
688 | return NULL; | |
689 | } | |
690 | else if ((vma >> 56) == 0x20) | |
691 | { | |
692 | sec = bfd_make_section_old_way (abfd, MMO_DATA_SECTION_NAME); | |
693 | ||
694 | if (sec == NULL) | |
695 | return NULL; | |
696 | ||
697 | if (! sec->user_set_vma) | |
698 | bfd_set_section_vma (abfd, sec, vma); | |
699 | if (! bfd_set_section_flags (abfd, sec, | |
700 | bfd_get_section_flags (abfd, sec) | |
701 | | SEC_LOAD | SEC_ALLOC)) | |
702 | return NULL; | |
703 | } | |
704 | ||
705 | bfd_map_over_sections (abfd, mmo_find_sec_w_addr_grow, &info); | |
706 | ||
707 | if (info.sec != NULL) | |
708 | return info.sec; | |
709 | ||
710 | /* If there's still no suitable section, make a new one. */ | |
711 | sprintf (sec_name, ".MMIX.sec.%d", abfd->tdata.mmo_data->sec_no++); | |
712 | sec = mmo_make_section (abfd, sec_name); | |
713 | if (! sec->user_set_vma) | |
714 | bfd_set_section_vma (abfd, sec, vma); | |
715 | ||
716 | if (! bfd_set_section_flags (abfd, sec, | |
717 | bfd_get_section_flags (abfd, sec) | |
718 | | SEC_LOAD | SEC_ALLOC)) | |
719 | return NULL; | |
720 | return sec; | |
721 | } | |
722 | ||
723 | /* Xor in a 64-bit value VALUE at VMA. */ | |
724 | ||
725 | static INLINE void | |
726 | mmo_xore_64 (sec, vma, value) | |
727 | asection *sec; | |
728 | bfd_vma vma; | |
729 | bfd_vma value; | |
730 | { | |
731 | bfd_byte *loc = mmo_get_loc (sec, vma, 8); | |
732 | bfd_vma prev = bfd_get_64 (sec->owner, loc); | |
733 | ||
734 | value ^= prev; | |
735 | bfd_put_64 (sec->owner, value, loc); | |
736 | } | |
737 | ||
738 | /* Xor in a 32-bit value VALUE at VMA. */ | |
739 | ||
740 | static INLINE void | |
741 | mmo_xore_32 (sec, vma, value) | |
742 | asection *sec; | |
743 | bfd_vma vma; | |
744 | unsigned int value; | |
745 | { | |
746 | bfd_byte *loc = mmo_get_loc (sec, vma, 4); | |
747 | unsigned int prev = bfd_get_32 (sec->owner, loc); | |
748 | ||
749 | value ^= prev; | |
750 | bfd_put_32 (sec->owner, value, loc); | |
751 | } | |
752 | ||
753 | /* Xor in a 16-bit value VALUE at VMA. */ | |
754 | ||
755 | static INLINE void | |
756 | mmo_xore_16 (sec, vma, value) | |
757 | asection *sec; | |
758 | bfd_vma vma; | |
759 | unsigned int value; | |
760 | { | |
761 | bfd_byte *loc = mmo_get_loc (sec, vma, 2); | |
762 | unsigned int prev = bfd_get_16 (sec->owner, loc); | |
763 | ||
764 | value ^= prev; | |
765 | bfd_put_16 (sec->owner, value, loc); | |
766 | } | |
767 | ||
768 | /* Write a 32-bit word to output file, no lop_quote generated. */ | |
769 | ||
770 | static INLINE void | |
771 | mmo_write_tetra_raw (abfd, value) | |
772 | bfd *abfd; | |
773 | unsigned int value; | |
774 | { | |
775 | bfd_byte buf[4]; | |
776 | ||
777 | bfd_put_32 (abfd, value, buf); | |
778 | ||
779 | if (bfd_bwrite ((PTR) buf, 4, abfd) != 4) | |
780 | abfd->tdata.mmo_data->have_error = true; | |
781 | } | |
782 | ||
783 | /* Write a 32-bit word to output file; lop_quote if necessary. */ | |
784 | ||
785 | static INLINE void | |
786 | mmo_write_tetra (abfd, value) | |
787 | bfd *abfd; | |
788 | unsigned int value; | |
789 | { | |
790 | if (((value >> 24) & 0xff) == LOP) | |
791 | mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); | |
792 | ||
793 | mmo_write_tetra_raw (abfd, value); | |
794 | } | |
795 | ||
796 | /* Write a 64-bit word to output file, perhaps with lop_quoting. */ | |
797 | ||
798 | static INLINE void | |
799 | mmo_write_octa (abfd, value) | |
800 | bfd *abfd; | |
801 | bfd_vma value; | |
802 | { | |
803 | mmo_write_tetra (abfd, (unsigned int) (value >> 32)); | |
804 | mmo_write_tetra (abfd, (unsigned int) value); | |
805 | } | |
806 | ||
807 | /* Write a 64-bit word to output file, without lop_quoting. */ | |
808 | ||
809 | static INLINE void | |
810 | mmo_write_octa_raw (abfd, value) | |
811 | bfd *abfd; | |
812 | bfd_vma value; | |
813 | { | |
814 | mmo_write_tetra_raw (abfd, (unsigned int) (value >> 32)); | |
815 | mmo_write_tetra_raw (abfd, (unsigned int) value); | |
816 | } | |
817 | ||
818 | /* Write quoted contents, zero filled. */ | |
819 | ||
820 | static INLINE boolean | |
821 | mmo_write_chunk (abfd, loc, len) | |
822 | bfd *abfd; | |
823 | CONST bfd_byte *loc; | |
824 | unsigned int len; | |
825 | { | |
826 | boolean retval = true; | |
827 | bfd_byte buf[4] = {0, 0, 0, 0}; | |
828 | ||
829 | while (len >= 4) | |
830 | { | |
831 | if (loc[0] == LOP) | |
832 | mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); | |
833 | ||
834 | retval | |
835 | = (retval == true | |
836 | && abfd->tdata.mmo_data->have_error == false | |
837 | && 4 == bfd_bwrite ((PTR) loc, 4, abfd)); | |
838 | ||
839 | loc += 4; | |
840 | len -= 4; | |
841 | } | |
842 | ||
843 | if (len) | |
844 | { | |
845 | memcpy (buf, loc, len); | |
846 | if (buf[0] == LOP) | |
847 | mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); | |
848 | ||
849 | retval | |
850 | = (retval == true | |
851 | && abfd->tdata.mmo_data->have_error == false | |
852 | && 4 == bfd_bwrite ((PTR) buf, 4, abfd)); | |
853 | } | |
854 | ||
855 | return retval; | |
856 | } | |
857 | ||
858 | /* Same, but from a list. */ | |
859 | ||
860 | static INLINE boolean | |
861 | mmo_write_chunk_list (abfd, datap) | |
862 | bfd *abfd; | |
863 | mmo_data_list_type *datap; | |
864 | { | |
865 | for (; datap != NULL; datap = datap->next) | |
866 | if (! mmo_write_chunk (abfd, datap->data, datap->size)) | |
867 | return false; | |
868 | ||
869 | return true; | |
870 | } | |
871 | ||
872 | /* Write a lop_loc and some contents. */ | |
873 | ||
874 | static boolean | |
875 | mmo_write_loc_chunk (abfd, vma, loc, len) | |
876 | bfd *abfd; | |
877 | bfd_vma vma; | |
878 | CONST bfd_byte *loc; | |
879 | unsigned int len; | |
880 | { | |
881 | /* We always write the location as 64 bits; no use saving bytes here. */ | |
882 | mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_LOC << 16) | 2); | |
883 | ||
884 | /* Find an initial and trailing section of zero tetras; we don't need to | |
885 | write out zeros. FIXME: When we do this, we should emit section size | |
886 | and address specifiers, else objcopy can't perform a unity | |
887 | translation. */ | |
888 | while (len >= 4 && bfd_get_32 (abfd, loc) == 0) | |
889 | { | |
890 | vma += 4; | |
891 | len -= 4; | |
892 | loc += 4; | |
893 | } | |
894 | ||
895 | while (len >= 4 && bfd_get_32 (abfd, loc + len - 4) == 0) | |
896 | len -= 4; | |
897 | ||
898 | mmo_write_octa_raw (abfd, vma); | |
899 | return | |
900 | abfd->tdata.mmo_data->have_error == false | |
901 | && mmo_write_chunk (abfd, loc, len); | |
902 | } | |
903 | ||
904 | /* Same, but from a list. */ | |
905 | ||
906 | static INLINE boolean | |
907 | mmo_write_loc_chunk_list (abfd, datap) | |
908 | bfd *abfd; | |
909 | mmo_data_list_type *datap; | |
910 | { | |
911 | for (; datap != NULL; datap = datap->next) | |
912 | if (! mmo_write_loc_chunk (abfd, datap->where, datap->data, datap->size)) | |
913 | return false; | |
914 | ||
915 | return true; | |
916 | } | |
917 | ||
918 | /* Make a .MMIX.spec_data.N section. */ | |
919 | ||
920 | static asection * | |
921 | mmo_get_generic_spec_data_section (abfd, spec_data_number) | |
922 | bfd *abfd; | |
923 | int spec_data_number; | |
924 | { | |
925 | asection *sec; | |
926 | char secname[sizeof (MMIX_OTHER_SPEC_SECTION_PREFIX) + 20] | |
927 | = MMIX_OTHER_SPEC_SECTION_PREFIX; | |
928 | ||
929 | sprintf (secname + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX), | |
930 | "%d", spec_data_number); | |
931 | ||
932 | sec = mmo_make_section (abfd, secname); | |
933 | ||
934 | return sec; | |
935 | } | |
936 | ||
937 | /* Make a special section for SPEC_DATA_NUMBER. If it is the one we use | |
938 | ourselves, parse some of its data to get at the section name. */ | |
939 | ||
940 | static asection * | |
941 | mmo_get_spec_section (abfd, spec_data_number) | |
942 | bfd *abfd; | |
943 | int spec_data_number; | |
944 | { | |
945 | bfd_byte *secname; | |
946 | asection *sec; | |
947 | bfd_byte buf[4]; | |
948 | unsigned int secname_length; | |
949 | unsigned int i; | |
950 | bfd_vma section_length; | |
951 | bfd_vma section_vma; | |
952 | mmo_data_list_type *loc; | |
953 | flagword flags; | |
954 | long orig_pos; | |
955 | ||
956 | /* If this isn't the "special" special data, then make a placeholder | |
957 | section. */ | |
958 | if (spec_data_number != SPEC_DATA_SECTION) | |
959 | return mmo_get_generic_spec_data_section (abfd, spec_data_number); | |
960 | ||
961 | /* Seek back to this position if there was a format error. */ | |
962 | orig_pos = bfd_tell (abfd); | |
963 | ||
964 | /* Read the length (in 32-bit words). */ | |
965 | if (bfd_bread (buf, 4, abfd) != 4) | |
966 | goto format_error; | |
967 | ||
968 | if (buf[0] == LOP) | |
969 | { | |
970 | if (buf[1] != LOP_QUOTE) | |
971 | goto format_error; | |
972 | ||
973 | if (bfd_bread (buf, 4, abfd) != 4) | |
974 | goto format_error; | |
975 | } | |
976 | ||
977 | /* We don't care to keep the name length accurate. It's | |
978 | zero-terminated. */ | |
979 | secname_length = bfd_get_32 (abfd, buf) * 4; | |
980 | ||
981 | /* Check section name length for sanity. */ | |
982 | if (secname_length > MAX_SECTION_NAME_SIZE) | |
983 | goto format_error; | |
984 | ||
985 | /* This should be free'd regardless if a section is created. */ | |
986 | secname = bfd_malloc (secname_length + 1); | |
987 | secname[secname_length] = 0; | |
988 | ||
989 | for (i = 0; i < secname_length / 4; i++) | |
990 | { | |
991 | if (bfd_bread (secname + i * 4, 4, abfd) != 4) | |
992 | goto format_error_free; | |
993 | ||
994 | if (secname[i * 4] == LOP) | |
995 | { | |
996 | /* A bit of overkill, but we handle char 0x98 in a section name, | |
997 | and recognize misparsing. */ | |
998 | if (secname[i * 4 + 1] != LOP_QUOTE | |
999 | || bfd_bread (secname + i * 4, 4, abfd) != 4) | |
1000 | /* Whoops. We thought this was a name, and now we found a | |
1001 | non-lop_quote lopcode before we parsed the whole length of | |
1002 | the name. Signal end-of-file in the same manner. */ | |
1003 | goto format_error_free; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | /* Get the section flags. */ | |
1008 | if (bfd_bread (buf, 4, abfd) != 4 | |
1009 | || (buf[0] == LOP | |
1010 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1011 | goto format_error_free; | |
1012 | ||
1013 | flags = bfd_get_32 (abfd, buf); | |
1014 | ||
1015 | /* Get the section length. */ | |
1016 | if (bfd_bread (buf, 4, abfd) != 4 | |
1017 | || (buf[0] == LOP | |
1018 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1019 | goto format_error_free; | |
1020 | ||
1021 | section_length = (bfd_vma) bfd_get_32 (abfd, buf) << 32; | |
1022 | ||
1023 | /* That's the first, high-part. Now get the low part. */ | |
1024 | ||
1025 | if (bfd_bread (buf, 4, abfd) != 4 | |
1026 | || (buf[0] == LOP | |
1027 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1028 | goto format_error_free; | |
1029 | ||
1030 | section_length |= (bfd_vma) bfd_get_32 (abfd, buf); | |
1031 | ||
1032 | /* Check the section length for sanity. */ | |
1033 | if (section_length > MAX_ARTIFICIAL_SECTION_SIZE) | |
1034 | goto format_error_free; | |
1035 | ||
1036 | /* Get the section VMA. */ | |
1037 | if (bfd_bread (buf, 4, abfd) != 4 | |
1038 | || (buf[0] == LOP | |
1039 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1040 | goto format_error_free; | |
1041 | ||
1042 | section_vma = (bfd_vma) bfd_get_32 (abfd, buf) << 32; | |
1043 | ||
1044 | /* That's the first, high-part. Now get the low part. */ | |
1045 | if (bfd_bread (buf, 4, abfd) != 4 | |
1046 | || (buf[0] == LOP | |
1047 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1048 | goto format_error_free; | |
1049 | ||
1050 | section_vma |= (bfd_vma) bfd_get_32 (abfd, buf); | |
1051 | ||
1052 | sec = mmo_make_section (abfd, secname); | |
1053 | free (secname); | |
1054 | if (sec == NULL) | |
1055 | goto format_error; | |
1056 | ||
1057 | /* We allocate a buffer here for the advertised size, with head room for | |
1058 | tetrabyte alignment. */ | |
1059 | loc = bfd_zmalloc (section_length + 3 | |
1060 | + sizeof (struct mmo_data_list_struct)); | |
1061 | if (loc == NULL) | |
1062 | goto format_error; | |
1063 | ||
1064 | /* Use a TETRA-rounded size for the allocated buffer; we set the | |
1065 | "visible" section size below. */ | |
1066 | loc->size = (section_length + 3) & ~3; | |
1067 | ||
1068 | /* Add in the section flags we found to those bfd entered during this | |
1069 | process and set the contents. */ | |
1070 | if (! bfd_set_section_flags (abfd, sec, | |
1071 | bfd_sec_flags_from_mmo_flags (flags) | |
1072 | | bfd_get_section_flags (abfd, sec) | |
1073 | | (section_length != 0 ? SEC_HAS_CONTENTS : 0)) | |
1074 | || ! bfd_set_section_size (abfd, sec, | |
1075 | sec->_cooked_size + section_length) | |
1076 | /* Set VMA only for the first occurrence. */ | |
1077 | || (! sec->user_set_vma | |
1078 | && ! bfd_set_section_vma (abfd, sec, section_vma))) | |
1079 | { | |
1080 | /* If we get an error for any of the calls above, signal more than | |
1081 | just a format error for the spec section. */ | |
1082 | return NULL; | |
1083 | } | |
1084 | ||
1085 | loc->next = NULL; | |
1086 | if (((struct mmo_section_data_struct *) (sec->used_by_bfd))->tail != NULL) | |
1087 | ((struct mmo_section_data_struct *) (sec->used_by_bfd))->tail->next | |
1088 | = loc; | |
1089 | else | |
1090 | ((struct mmo_section_data_struct *) (sec->used_by_bfd))->head = loc; | |
1091 | ((struct mmo_section_data_struct *) (sec->used_by_bfd))->tail = loc; | |
1092 | loc->where = section_vma; | |
1093 | ||
1094 | return sec; | |
1095 | ||
1096 | format_error_free: | |
1097 | free (secname); | |
1098 | format_error: | |
1099 | if (bfd_seek (abfd, orig_pos, SEEK_SET) != 0) | |
1100 | return NULL; | |
1101 | ||
1102 | return mmo_get_generic_spec_data_section (abfd, spec_data_number); | |
1103 | } | |
1104 | ||
1105 | /* Read a byte, but read from file in multiples of 32-bit words. */ | |
1106 | ||
1107 | static bfd_byte | |
1108 | mmo_get_byte (abfd) | |
1109 | bfd *abfd; | |
1110 | { | |
1111 | bfd_byte retval; | |
1112 | ||
1113 | if (abfd->tdata.mmo_data->byte_no == 0) | |
1114 | { | |
1115 | if (abfd->tdata.mmo_data->have_error == false | |
1116 | && bfd_bread (abfd->tdata.mmo_data->buf, 4, abfd) != 4) | |
1117 | { | |
1118 | abfd->tdata.mmo_data->have_error = true; | |
1119 | ||
1120 | /* A value somewhat safe against tripping on some inconsistency | |
1121 | when mopping up after this error. */ | |
1122 | return 128; | |
1123 | } | |
1124 | } | |
1125 | ||
1126 | retval = abfd->tdata.mmo_data->buf[abfd->tdata.mmo_data->byte_no]; | |
1127 | abfd->tdata.mmo_data->byte_no = (abfd->tdata.mmo_data->byte_no + 1) % 4; | |
1128 | ||
1129 | return retval; | |
1130 | } | |
1131 | ||
1132 | /* Write a byte, in multiples of 32-bit words. */ | |
1133 | ||
1134 | static void | |
1135 | mmo_write_byte (abfd, value) | |
1136 | bfd *abfd; | |
1137 | bfd_byte value; | |
1138 | { | |
1139 | abfd->tdata.mmo_data->buf[(abfd->tdata.mmo_data->byte_no++ % 4)] = value; | |
1140 | if ((abfd->tdata.mmo_data->byte_no % 4) == 0) | |
1141 | { | |
1142 | if (abfd->tdata.mmo_data->have_error == false | |
1143 | && bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) | |
1144 | abfd->tdata.mmo_data->have_error = true; | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | /* Create a symbol. */ | |
1149 | ||
1150 | static boolean | |
1151 | mmo_create_symbol (abfd, symname, addr, sym_type, serno) | |
1152 | bfd *abfd; | |
1153 | CONST char *symname; | |
1154 | bfd_vma addr; | |
1155 | enum mmo_sym_type sym_type; | |
1156 | unsigned int serno; | |
1157 | { | |
1158 | struct mmo_symbol *n; | |
1159 | ||
1160 | n = (struct mmo_symbol *) bfd_alloc (abfd, sizeof (struct mmo_symbol)); | |
1161 | if (n == NULL) | |
1162 | return false; | |
1163 | ||
1164 | n->name = bfd_alloc (abfd, strlen (symname) + 1); | |
1165 | if (n->name == NULL) | |
1166 | return false; | |
1167 | ||
1168 | strcpy ((PTR) n->name, symname); | |
1169 | ||
1170 | n->value = addr; | |
1171 | n->sym_type = sym_type; | |
1172 | n->serno = serno; | |
1173 | ||
1174 | if (abfd->tdata.mmo_data->symbols == NULL) | |
1175 | abfd->tdata.mmo_data->symbols = n; | |
1176 | else | |
1177 | abfd->tdata.mmo_data->symtail->next = n; | |
1178 | abfd->tdata.mmo_data->symtail = n; | |
1179 | n->next = NULL; | |
1180 | ||
1181 | ++abfd->symcount; | |
1182 | ||
1183 | /* Check that :Main equals the last octa of the .MMIX.reg_contents | |
1184 | section, as it's the one place we're sure to pass when reading a mmo | |
1185 | object. For written objects, we do it while setting the symbol | |
1186 | table. */ | |
1187 | if (strcmp (symname, MMIX_START_SYMBOL_NAME) == 0 | |
1188 | && bfd_get_start_address (abfd) != addr) | |
1189 | { | |
1190 | (*_bfd_error_handler) | |
1191 | (_("%s: invalid mmo file: initialization value for $255 is not `Main'\n"), | |
1192 | bfd_get_filename (abfd)); | |
1193 | bfd_set_error (bfd_error_bad_value); | |
1194 | return false; | |
1195 | } | |
1196 | ||
1197 | return true; | |
1198 | } | |
1199 | ||
1200 | /* Read in symbols. */ | |
1201 | ||
1202 | static boolean | |
1203 | mmo_get_symbols (abfd) | |
1204 | bfd *abfd; | |
1205 | { | |
1206 | /* | |
1207 | INODE | |
1208 | Symbol-table, mmo section mapping, File layout, mmo | |
1209 | SUBSECTION | |
1210 | Symbol table format | |
1211 | ||
1212 | From mmixal.w (or really, the generated mmixal.tex) in | |
6eeb40b2 | 1213 | @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz}): |
3c3bdf30 NC |
1214 | ``Symbols are stored and retrieved by means of a @samp{ternary |
1215 | search trie}, following ideas of Bentley and Sedgewick. (See | |
1216 | ACM--SIAM Symp.@: on Discrete Algorithms @samp{8} (1997), 360--369; | |
1217 | R.@:Sedgewick, @samp{Algorithms in C} (Reading, Mass.@: | |
1218 | Addison--Wesley, 1998), @samp{15.4}.) Each trie node stores a | |
1219 | character, and there are branches to subtries for the cases where | |
1220 | a given character is less than, equal to, or greater than the | |
1221 | character in the trie. There also is a pointer to a symbol table | |
1222 | entry if a symbol ends at the current node.'' | |
1223 | ||
1224 | So it's a tree encoded as a stream of bytes. The stream of bytes | |
1225 | acts on a single virtual global symbol, adding and removing | |
1226 | characters and signalling complete symbol points. Here, we read | |
1227 | the stream and create symbols at the completion points. | |
1228 | ||
1229 | First, there's a control byte <<m>>. If any of the listed bits | |
1230 | in <<m>> is nonzero, we execute what stands at the right, in | |
1231 | the listed order: | |
1232 | ||
1233 | | (MMO3_LEFT) | |
1234 | | 0x40 - Traverse left trie. | |
1235 | | (Read a new command byte and recurse.) | |
1236 | | | |
1237 | | (MMO3_SYMBITS) | |
1238 | | 0x2f - Read the next byte as a character and store it in the | |
1239 | | current character position; increment character position. | |
1240 | | Test the bits of <<m>>: | |
1241 | | | |
1242 | | (MMO3_WCHAR) | |
1243 | | 0x80 - The character is 16-bit (so read another byte, | |
1244 | | merge into current character. | |
1245 | | | |
1246 | | (MMO3_TYPEBITS) | |
1247 | | 0xf - We have a complete symbol; parse the type, value | |
1248 | | and serial number and do what should be done | |
1249 | | with a symbol. The type and length information | |
1250 | | is in j = (m & 0xf). | |
1251 | | | |
1252 | | (MMO3_REGQUAL_BITS) | |
1253 | | j == 0xf: A register variable. The following | |
1254 | | byte tells which register. | |
1255 | | j <= 8: An absolute symbol. Read j bytes as the | |
1256 | | big-endian number the symbol equals. | |
1257 | | A j = 2 with two zero bytes denotes an | |
1258 | | unknown symbol. | |
1259 | | j > 8: As with j <= 8, but add (0x20 << 56) | |
1260 | | to the value in the following j - 8 | |
1261 | | bytes. | |
1262 | | | |
1263 | | Then comes the serial number, as a variant of | |
1264 | | uleb128, but better named ubeb128: | |
1265 | | Read bytes and shift the previous value left 7 | |
1266 | | (multiply by 128). Add in the new byte, repeat | |
1267 | | until a byte has bit 7 set. The serial number | |
1268 | | is the computed value minus 128. | |
1269 | | | |
1270 | | (MMO3_MIDDLE) | |
1271 | | 0x20 - Traverse middle trie. (Read a new command byte | |
1272 | | and recurse.) Decrement character position. | |
1273 | | | |
1274 | | (MMO3_RIGHT) | |
1275 | | 0x10 - Traverse right trie. (Read a new command byte and | |
1276 | | recurse.) | |
1277 | ||
1278 | Let's look again at the <<lop_stab>> for the trivial file | |
1279 | (@pxref{File layout}). | |
1280 | ||
1281 | | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. | |
1282 | | 0x203a4040 | |
1283 | | 0x10404020 | |
1284 | | 0x4d206120 | |
1285 | | 0x69016e00 | |
1286 | | 0x81000000 | |
1287 | ||
1288 | This forms the trivial trie (note that the path between ``:'' and | |
1289 | ``M'' is redundant): | |
1290 | ||
1291 | | 203a ":" | |
1292 | | 40 / | |
1293 | | 40 / | |
1294 | | 10 \ | |
1295 | | 40 / | |
1296 | | 40 / | |
1297 | | 204d "M" | |
1298 | | 2061 "a" | |
1299 | | 2069 "i" | |
1300 | | 016e "n" is the last character in a full symbol, and | |
1301 | | with a value represented in one byte. | |
1302 | | 00 The value is 0. | |
1303 | | 81 The serial number is 1. */ | |
1304 | ||
1305 | bfd_byte m = mmo_get_byte (abfd); | |
1306 | ||
1307 | /* Check first if we have a bad hair day. */ | |
1308 | if (abfd->tdata.mmo_data->have_error == true) | |
1309 | return false; | |
1310 | ||
1311 | if (m & MMO3_LEFT) | |
1312 | /* Traverse left trie. */ | |
1313 | mmo_get_symbols (abfd); | |
1314 | ||
1315 | if (m & MMO3_SYMBITS) | |
1316 | { | |
1317 | bfd_byte c = mmo_get_byte (abfd); | |
1318 | bfd_byte j = m & MMO3_TYPEBITS; | |
1319 | bfd_vma addr = 0; | |
1320 | enum mmo_sym_type sym_type; | |
1321 | unsigned int serno = 0; | |
1322 | bfd_byte k; | |
1323 | ||
1324 | if (m & MMO3_WCHAR) | |
1325 | { | |
1326 | bfd_byte c2 = mmo_get_byte (abfd); | |
1327 | ||
1328 | /* A two-byte character. We can't grok this, but neither can | |
1329 | mmotype, for other cases than the second byte being zero. */ | |
1330 | ||
1331 | if (c != 0) | |
1332 | { | |
1333 | abfd->tdata.mmo_data->lop_stab_symbol | |
1334 | [abfd->tdata.mmo_data->symbol_position] = 0; | |
1335 | ||
1336 | (*_bfd_error_handler) | |
1337 | (_("%s: unsupported wide character sequence\ | |
1338 | 0x%02X 0x%02X after symbol name starting with `%s'\n"), | |
1339 | bfd_get_filename (abfd), c, c2, | |
1340 | abfd->tdata.mmo_data->lop_stab_symbol); | |
1341 | bfd_set_error (bfd_error_bad_value); | |
1342 | abfd->tdata.mmo_data->have_error = true; | |
1343 | return false; | |
1344 | } | |
1345 | else | |
1346 | c = c2; | |
1347 | } | |
1348 | ||
1349 | abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position++] = c; | |
1350 | abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position] = 0; | |
1351 | ||
1352 | if (j & MMO3_REGQUAL_BITS) | |
1353 | { | |
1354 | if (j == MMO3_REGQUAL_BITS) | |
1355 | { | |
1356 | sym_type = mmo_reg_sym; | |
1357 | addr = mmo_get_byte (abfd); | |
1358 | } | |
1359 | else if (j <= 8) | |
1360 | { | |
1361 | unsigned int i; | |
1362 | ||
1363 | for (i = 0; i < j; i++) | |
1364 | addr = (addr << 8) + mmo_get_byte (abfd); | |
1365 | ||
1366 | if (addr == 0 && j == MMO3_UNDEF) | |
1367 | sym_type = mmo_undef_sym; | |
1368 | else | |
1369 | sym_type = mmo_abs_sym; | |
1370 | } | |
1371 | else | |
1372 | { | |
1373 | unsigned int i; | |
1374 | ||
1375 | for (i = MMO3_DATA; i < j; i++) | |
1376 | addr = (addr << 8) + mmo_get_byte (abfd); | |
1377 | ||
1378 | addr += (bfd_vma) 0x20 << 56; | |
1379 | sym_type = mmo_data_sym; | |
1380 | } | |
1381 | ||
1382 | /* Get the serial number. */ | |
1383 | do | |
1384 | { | |
1385 | k = mmo_get_byte (abfd); | |
1386 | serno = (serno << 7) + k; | |
1387 | } | |
1388 | while (k < 128); | |
1389 | serno -= 128; | |
1390 | ||
1391 | /* Got it. Now enter it. Skip a leading ":". */ | |
1392 | if (abfd->tdata.mmo_data->have_error == false | |
1393 | && ! mmo_create_symbol (abfd, | |
1394 | abfd->tdata.mmo_data->lop_stab_symbol | |
1395 | + 1, | |
1396 | addr, sym_type, serno)) | |
1397 | abfd->tdata.mmo_data->have_error = true; | |
1398 | } | |
1399 | ||
1400 | if (m & MMO3_MIDDLE) | |
1401 | /* Traverse middle trie. */ | |
1402 | mmo_get_symbols (abfd); | |
1403 | ||
1404 | abfd->tdata.mmo_data->symbol_position--; | |
1405 | } | |
1406 | ||
1407 | if (m & MMO3_RIGHT) | |
1408 | /* Traverse right trie. */ | |
1409 | mmo_get_symbols (abfd); | |
1410 | ||
1411 | return abfd->tdata.mmo_data->have_error == false; | |
1412 | } | |
1413 | ||
1414 | /* Get the location of memory area [VMA..VMA + SIZE - 1], which we think | |
1415 | is in section SEC. Adjust and reallocate zero-initialized contents. | |
1416 | If there's new contents, allocate to the next multiple of | |
1417 | MMO_SEC_CONTENTS_CHUNK_SIZE. */ | |
1418 | ||
1419 | static INLINE bfd_byte * | |
1420 | mmo_get_loc (sec, vma, size) | |
1421 | asection *sec; | |
1422 | bfd_vma vma; | |
1423 | int size; | |
1424 | { | |
1425 | bfd_size_type allocated_size; | |
1426 | struct mmo_section_data_struct *sdatap | |
1427 | = (struct mmo_section_data_struct *) sec->used_by_bfd; | |
1428 | struct mmo_data_list_struct *datap = sdatap->head; | |
1429 | struct mmo_data_list_struct *entry; | |
1430 | ||
1431 | for (; datap != NULL; datap = datap->next) | |
1432 | { | |
1433 | if (datap->where <= vma | |
1434 | && datap->where + datap->size >= vma + size) | |
1435 | return datap->data + vma - datap->where; | |
1436 | else if (datap->where <= vma | |
1437 | && datap->where + datap->allocated_size >= vma + size | |
1438 | /* Only munch on the "allocated size" if it does not | |
1439 | overlap the next chunk. */ | |
1440 | && (datap->next == NULL || datap->next->where >= vma + size)) | |
1441 | { | |
1442 | /* There was room allocated, but the size wasn't set to include | |
1443 | it. Do that now. */ | |
1444 | datap->size += (vma + size) - (datap->where + datap->size); | |
1445 | ||
1446 | /* Update the section size. */ | |
1447 | if (vma + size > sec->vma + sec->_raw_size) | |
1448 | sec->_raw_size += (vma + size) - (sec->vma + sec->_raw_size); | |
1449 | ||
1450 | return datap->data + vma - datap->where; | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | /* Not found; allocate a new block. First check in case we get a | |
1455 | request for a size split up over several blocks; we'll have to return | |
1456 | NULL for those cases, requesting the caller to split up the request. | |
1457 | Requests with an address aligned on MMO_SEC_CONTENTS_CHUNK_SIZE bytes and | |
1458 | for no more than MMO_SEC_CONTENTS_CHUNK_SIZE will always get resolved. */ | |
1459 | ||
1460 | for (datap = sdatap->head; datap != NULL; datap = datap->next) | |
1461 | if ((datap->where <= vma && datap->where + datap->size > vma) | |
1462 | || (datap->where < vma + size | |
1463 | && datap->where + datap->size >= vma + size)) | |
1464 | return NULL; | |
1465 | ||
1466 | allocated_size | |
1467 | = (size + MMO_SEC_CONTENTS_CHUNK_SIZE - 1) & ~(MMO_SEC_CONTENTS_CHUNK_SIZE - 1); | |
1468 | entry = (mmo_data_list_type *) | |
1469 | bfd_zalloc (sec->owner, sizeof (mmo_data_list_type) + allocated_size); | |
1470 | if (entry == NULL) | |
1471 | return false; | |
1472 | entry->where = vma; | |
1473 | entry->size = size; | |
1474 | entry->allocated_size = allocated_size; | |
1475 | ||
1476 | datap = sdatap->head; | |
1477 | ||
1478 | /* Sort the records by address. Optimize for the common case of adding | |
1479 | a record to the end of the list. */ | |
1480 | if (sdatap->tail != NULL && entry->where >= sdatap->tail->where) | |
1481 | { | |
1482 | sdatap->tail->next = entry; | |
1483 | entry->next = NULL; | |
1484 | sdatap->tail = entry; | |
1485 | } | |
1486 | else | |
1487 | { | |
1488 | mmo_data_list_type **look; | |
1489 | for (look = &sdatap->head; | |
1490 | *look != NULL && (*look)->where < entry->where; | |
1491 | look = &(*look)->next) | |
1492 | ; | |
1493 | entry->next = *look; | |
1494 | *look = entry; | |
1495 | if (entry->next == NULL) | |
1496 | { | |
1497 | sdatap->tail = entry; | |
1498 | ||
1499 | /* We get here for the first time (at other times too) for this | |
1500 | section. Say we have contents. */ | |
1501 | if (! bfd_set_section_flags (sec->owner, sec, | |
1502 | bfd_get_section_flags (sec->owner, sec) | |
1503 | | SEC_HAS_CONTENTS)) | |
1504 | return NULL; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | /* Update the section size. */ | |
1509 | if (vma + size > sec->vma + sec->_raw_size) | |
1510 | sec->_raw_size += (vma + size) - (sec->vma + sec->_raw_size); | |
1511 | return entry->data; | |
1512 | } | |
1513 | ||
1514 | /* Set sizes once we've read in all sections. */ | |
1515 | ||
1516 | static void | |
1517 | mmo_map_set_sizes (abfd, sec, ignored) | |
1518 | bfd *abfd ATTRIBUTE_UNUSED; | |
1519 | asection *sec; | |
1520 | PTR ignored ATTRIBUTE_UNUSED; | |
1521 | { | |
1522 | sec->_cooked_size = sec->_raw_size; | |
1523 | sec->lma = sec->vma; | |
1524 | } | |
1525 | ||
1526 | /* Read the mmo file and turn it into sections. */ | |
1527 | ||
1528 | static boolean | |
1529 | mmo_scan (abfd) | |
1530 | bfd *abfd; | |
1531 | { | |
1532 | unsigned int i; | |
1533 | unsigned int lineno = 1; | |
1534 | boolean error = false; | |
1535 | bfd_vma vma = 0; | |
1536 | asection *sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); | |
1537 | asection *non_spec_sec = NULL; | |
1538 | bfd_vma non_spec_vma = 0; | |
1539 | char *current_filename = NULL; | |
1540 | bfd_size_type nbytes_read = 0; | |
1541 | /* Buffer with room to read a 64-bit value. */ | |
1542 | bfd_byte buf[8]; | |
1543 | long stab_loc = -1; | |
1544 | char *file_names[256]; | |
1545 | ||
1546 | memset (file_names, 0, sizeof (file_names)); | |
1547 | ||
1548 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) | |
1549 | goto error_return; | |
1550 | ||
1551 | while ((nbytes_read = bfd_bread (buf, 4, abfd)) == 4) | |
1552 | { | |
1553 | if (buf[0] == LOP) | |
1554 | { | |
1555 | unsigned int y = bfd_get_8 (abfd, buf + 2); | |
1556 | unsigned int z = bfd_get_8 (abfd, buf + 3); | |
1557 | ||
1558 | /* Change back to the original section for lopcodes other | |
1559 | than LOP_QUOTE that comes after a LOP_SPEC. */ | |
1560 | if ((buf[1] != LOP_QUOTE || y != 0 || z != 1) | |
1561 | && non_spec_sec != NULL) | |
1562 | { | |
1563 | sec = non_spec_sec; | |
1564 | vma = non_spec_vma; | |
1565 | non_spec_sec = NULL; | |
1566 | } | |
1567 | ||
1568 | switch (buf[1]) | |
1569 | { | |
1570 | default: | |
1571 | (*_bfd_error_handler) | |
1572 | (_("%s: invalid mmo file: unsupported lopcode `%d'\n"), | |
1573 | bfd_get_filename (abfd), buf[1]); | |
1574 | bfd_set_error (bfd_error_bad_value); | |
1575 | goto error_return; | |
1576 | ||
1577 | case LOP_QUOTE: | |
1578 | /* Quote the next 32-bit word. */ | |
1579 | if (y != 0 || z != 1) | |
1580 | { | |
1581 | (*_bfd_error_handler) | |
1582 | (_("%s: invalid mmo file: expected YZ = 1 got YZ = %d for lop_quote\n"), | |
1583 | bfd_get_filename (abfd), y*256+z); | |
1584 | bfd_set_error (bfd_error_bad_value); | |
1585 | goto error_return; | |
1586 | } | |
1587 | if (bfd_bread (buf, 4, abfd) != 4) | |
1588 | goto error_return; | |
1589 | ||
1590 | mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf)); | |
1591 | vma += 4; | |
1592 | vma &= ~3; | |
1593 | lineno++; | |
1594 | break; | |
1595 | ||
1596 | case LOP_LOC: | |
1597 | /* Set vma (and section). */ | |
1598 | vma = (bfd_vma) y << 56; | |
1599 | if (z == 1) | |
1600 | { | |
1601 | /* Get a 32-bit value. */ | |
1602 | if (bfd_bread (buf, 4, abfd) != 4) | |
1603 | goto error_return; | |
1604 | ||
1605 | vma += bfd_get_32 (abfd, buf); | |
1606 | } | |
1607 | else if (z == 2) | |
1608 | { | |
1609 | /* Get a 64-bit value. */ | |
1610 | if (bfd_bread (buf, 8, abfd) != 8) | |
1611 | goto error_return; | |
1612 | ||
1613 | vma += bfd_get_64 (abfd, buf); | |
1614 | } | |
1615 | else | |
1616 | { | |
1617 | (*_bfd_error_handler) | |
1618 | (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_loc\n"), | |
1619 | bfd_get_filename (abfd), z); | |
1620 | bfd_set_error (bfd_error_bad_value); | |
1621 | goto error_return; | |
1622 | } | |
1623 | ||
1624 | sec = mmo_decide_section (abfd, vma); | |
1625 | if (sec == NULL) | |
1626 | goto error_return; | |
1627 | break; | |
1628 | ||
1629 | case LOP_SKIP: | |
1630 | /* Move forward within the same section. */ | |
1631 | vma += y * 256 + z; | |
1632 | ||
1633 | sec = mmo_decide_section (abfd, vma); | |
1634 | if (sec == NULL) | |
1635 | goto error_return; | |
1636 | break; | |
1637 | ||
1638 | case LOP_FIXO: | |
1639 | /* A fixup: Store the current vma somewhere. Position using | |
1640 | same format as LOP_LOC. */ | |
1641 | { | |
1642 | bfd_vma p = (bfd_vma) y << 56; | |
1643 | asection *fixosec; | |
1644 | ||
1645 | if (z == 1) | |
1646 | { | |
1647 | /* Get a 32-bit value. */ | |
1648 | if (bfd_bread (buf, 4, abfd) != 4) | |
1649 | goto error_return; | |
1650 | ||
1651 | p += bfd_get_32 (abfd, buf); | |
1652 | } | |
1653 | else if (z == 2) | |
1654 | { | |
1655 | /* Get a 64-bit value. */ | |
1656 | if (bfd_bread (buf, 8, abfd) != 8) | |
1657 | goto error_return; | |
1658 | ||
1659 | p += bfd_get_64 (abfd, buf); | |
1660 | } | |
1661 | else | |
1662 | { | |
1663 | (*_bfd_error_handler) | |
1664 | (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_fixo\n"), | |
1665 | bfd_get_filename (abfd), z); | |
1666 | bfd_set_error (bfd_error_bad_value); | |
1667 | goto error_return; | |
1668 | } | |
1669 | ||
1670 | /* The section where we store this address might be a | |
1671 | different one than the current section. */ | |
1672 | fixosec = mmo_decide_section (abfd, p); | |
1673 | if (fixosec == NULL) | |
1674 | goto error_return; | |
1675 | mmo_xore_64 (fixosec, p, vma); | |
1676 | } | |
1677 | break; | |
1678 | ||
1679 | case LOP_FIXR: | |
1680 | /* A fixup: Store YZ of this lopcode into YZ at vma - 4 * yz. */ | |
1681 | { | |
1682 | unsigned int yz = (y * 256 + z); | |
1683 | bfd_vma p = vma + 2 - 4 * yz; | |
1684 | asection *fixrsec = mmo_decide_section (abfd, p); | |
1685 | if (fixrsec == NULL) | |
1686 | goto error_return; | |
1687 | mmo_xore_16 (fixrsec, p, yz); | |
1688 | } | |
1689 | break; | |
1690 | ||
1691 | case LOP_FIXRX: | |
1692 | /* A fixup, similar to lop_fixr, but taking larger numbers | |
1693 | and can change branches into the opposite direction | |
1694 | (gasp!). */ | |
1695 | { | |
1696 | bfd_vma delta; | |
1697 | bfd_vma p; | |
1698 | asection *fixrsec; | |
1699 | ||
1700 | if (y != 0) | |
1701 | { | |
1702 | (*_bfd_error_handler) | |
1703 | (_("%s: invalid mmo file: expected y = 0, got y = %d for lop_fixrx\n"), | |
1704 | bfd_get_filename (abfd), y); | |
1705 | bfd_set_error (bfd_error_bad_value); | |
1706 | goto error_return; | |
1707 | } | |
1708 | ||
1709 | if (z != 16 && z != 24) | |
1710 | { | |
1711 | (*_bfd_error_handler) | |
1712 | (_("%s: invalid mmo file: expected z = 16 or z = 24, got z = %d for lop_fixrx\n"), | |
1713 | bfd_get_filename (abfd), z); | |
1714 | bfd_set_error (bfd_error_bad_value); | |
1715 | goto error_return; | |
1716 | } | |
1717 | ||
1718 | /* Get the next 32-bit value. */ | |
1719 | if (bfd_bread (buf, 4, abfd) != 4) | |
1720 | goto error_return; | |
1721 | ||
1722 | delta = bfd_get_32 (abfd, buf); | |
1723 | ||
1724 | /* Do an, ehm, involved calculation for the location of | |
1725 | the fixup. See mmixal documentation for a verbose | |
1726 | explanation. We follow it verbosely here for the | |
1727 | readers delight. */ | |
1728 | if (buf[0] == 0) | |
1729 | p = vma - 4 * delta; | |
1730 | else if (buf[0] == 1) | |
1731 | p = vma - 4 * ((delta & 0xffffff) - (1 << z)); | |
1732 | else | |
1733 | { | |
1734 | (*_bfd_error_handler) | |
1735 | (_("%s: invalid mmo file: leading byte of operand word must be 0 or 1, got %d for lop_fixrx\n"), | |
1736 | bfd_get_filename (abfd), buf[0]); | |
1737 | bfd_set_error (bfd_error_bad_value); | |
1738 | goto error_return; | |
1739 | } | |
1740 | ||
1741 | fixrsec = mmo_decide_section (abfd, vma); | |
1742 | if (fixrsec == NULL) | |
1743 | goto error_return; | |
1744 | mmo_xore_32 (fixrsec, p, delta); | |
1745 | } | |
1746 | break; | |
1747 | ||
1748 | case LOP_FILE: | |
1749 | /* Set current file and perhaps the file name. Reset line | |
1750 | number. */ | |
1751 | if (z != 0) | |
1752 | { | |
1753 | char *fname = bfd_malloc (z * 4 + 1); | |
1754 | ||
1755 | if (fname == NULL) | |
1756 | { | |
1757 | (*_bfd_error_handler) | |
1758 | (_("%s: cannot allocate file name for file number %d, %d bytes\n"), | |
1759 | bfd_get_filename (abfd), y, z * 4 + 1); | |
1760 | bfd_set_error (bfd_error_system_call); | |
1761 | goto error_return; | |
1762 | } | |
1763 | ||
1764 | fname[z * 4] = 0; | |
1765 | ||
1766 | for (i = 0; i < z; i++) | |
1767 | { | |
1768 | if (bfd_bread (fname + i * 4, 4, abfd) != 4) | |
1769 | { | |
1770 | free (fname); | |
1771 | goto error_return; | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | if (file_names[y] != NULL) | |
1776 | { | |
1777 | (*_bfd_error_handler) | |
1778 | (_("%s: invalid mmo file: file number %d `%s',\ | |
1779 | was already entered as `%s'\n"), | |
1780 | bfd_get_filename (abfd), y, fname, file_names[y]); | |
1781 | bfd_set_error (bfd_error_bad_value); | |
1782 | goto error_return; | |
1783 | } | |
1784 | ||
1785 | file_names[y] = fname; | |
1786 | } | |
1787 | ||
1788 | if (file_names[y] == NULL) | |
1789 | { | |
1790 | (*_bfd_error_handler) | |
1791 | (_("%s: invalid mmo file: file name for number %d\ | |
1792 | was not specified before use\n"), | |
1793 | bfd_get_filename (abfd), y); | |
1794 | bfd_set_error (bfd_error_bad_value); | |
1795 | goto error_return; | |
1796 | } | |
1797 | ||
1798 | current_filename = file_names[y]; | |
1799 | lineno = 0; | |
1800 | break; | |
1801 | ||
1802 | case LOP_LINE: | |
1803 | /* Set line number. */ | |
1804 | lineno = y * 256 + z; | |
1805 | /* FIXME: Create a sequence of mmo-specific line number | |
1806 | entries for each section, then translate into canonical | |
1807 | format. */ | |
1808 | break; | |
1809 | ||
1810 | case LOP_SPEC: | |
1811 | /* Special data follows until the next non-lop_quote | |
1812 | lopcode. */ | |
1813 | non_spec_sec = sec; | |
1814 | non_spec_vma = vma; | |
1815 | sec = mmo_get_spec_section (abfd, y * 256 + z); | |
1816 | if (sec == NULL) | |
1817 | goto error_return; | |
1818 | ||
1819 | vma = sec->vma; | |
1820 | break; | |
1821 | ||
1822 | case LOP_PRE: | |
1823 | { | |
1824 | /* We ignore header information, except we read in the | |
1825 | creation time from the first 32-bit word with the time | |
1826 | in seconds since era. */ | |
1827 | if (z >= 1 | |
1828 | && bfd_bread (abfd->tdata.mmo_data->created, 4, | |
1829 | abfd) != 4) | |
1830 | goto error_return; | |
1831 | ||
1832 | for (i = 1; i < z; i++) | |
1833 | if (bfd_bread (buf, 4, abfd) != 4) | |
1834 | goto error_return; | |
1835 | } | |
1836 | break; | |
1837 | ||
1838 | case LOP_POST: | |
1839 | /* This tells of the contents of registers $Z..$255 at | |
1840 | startup. We make a section out of it, with VMA = Z * 8, | |
1841 | but only if Z != 255 or the contents is non-zero. */ | |
1842 | { | |
1843 | asection *rsec; | |
1844 | bfd_byte *loc; | |
1845 | bfd_vma first_octa; | |
1846 | bfd_vma startaddr_octa; | |
1847 | ||
1848 | /* Read first octaword outside loop to simplify logic when | |
1849 | excluding the Z == 255, octa == 0 case. */ | |
1850 | if (bfd_bread (buf, 8, abfd) != 8) | |
1851 | goto error_return; | |
1852 | ||
1853 | first_octa = bfd_get_64 (abfd, buf); | |
1854 | ||
1855 | /* Don't emit contents for the trivial case which is | |
1856 | always present; $255 pointing to Main. */ | |
1857 | if (z != 255) | |
1858 | { | |
1859 | rsec | |
1860 | = bfd_make_section_old_way (abfd, | |
1861 | MMIX_REG_CONTENTS_SECTION_NAME); | |
1862 | rsec->vma = z * 8; | |
1863 | loc = mmo_get_loc (rsec, z * 8, (255 - z) * 8); | |
1864 | bfd_put_64 (abfd, first_octa, loc); | |
1865 | ||
1866 | for (i = z + 1; i < 255; i++) | |
1867 | { | |
1868 | if (bfd_bread (loc + (i - z) * 8, 8, abfd) != 8) | |
1869 | goto error_return; | |
1870 | } | |
1871 | ||
1872 | /* Read out the last octabyte, and use it to set the | |
1873 | start address. */ | |
1874 | if (bfd_bread (buf, 8, abfd) != 8) | |
1875 | goto error_return; | |
1876 | ||
1877 | startaddr_octa = bfd_get_64 (abfd, buf); | |
1878 | } | |
1879 | else | |
1880 | startaddr_octa = first_octa; | |
1881 | ||
1882 | if (! bfd_set_start_address (abfd, startaddr_octa)) | |
1883 | { | |
1884 | /* Currently this can't fail, but this should handle | |
1885 | future failures. */ | |
1886 | bfd_set_error (bfd_error_bad_value); | |
1887 | goto error_return; | |
1888 | } | |
1889 | } | |
1890 | break; | |
1891 | ||
1892 | case LOP_STAB: | |
1893 | /* We read in the symbols now, not later. */ | |
1894 | if (y != 0 || z != 0) | |
1895 | { | |
1896 | (*_bfd_error_handler) | |
1897 | (_("%s: invalid mmo file: fields y and z of lop_stab\ | |
1898 | non-zero, y: %d, z: %d\n"), | |
1899 | bfd_get_filename (abfd), y, z); | |
1900 | bfd_set_error (bfd_error_bad_value); | |
1901 | goto error_return; | |
1902 | } | |
1903 | ||
1904 | /* Save the location, so we can check that YZ in the LOP_END | |
1905 | is correct. */ | |
1906 | stab_loc = bfd_tell (abfd); | |
1907 | ||
1908 | /* It's not said that an MMO can be without symbols (though | |
1909 | mmixal will refuse to assemble files without Main), but | |
1910 | it seems it would still be a valid mmo-file, so allow it. | |
1911 | We detect the absence of a symbol area in that the upper | |
1912 | limit is computed (from the lop_end YZ field) as 0. | |
1913 | Don't call mmo_get_symbols; it can only detect the end of | |
1914 | a valid symbol trie, not the absence of one. */ | |
1915 | if (abfd->tdata.mmo_data->max_symbol_length != 0 | |
1916 | && ! mmo_get_symbols (abfd)) | |
1917 | goto error_return; | |
1918 | break; | |
1919 | ||
1920 | case LOP_END: | |
1921 | { | |
1922 | /* This must be the last 32-bit word in an mmo file. | |
1923 | Let's find out. */ | |
1924 | struct stat statbuf; | |
1925 | long curpos = bfd_tell (abfd); | |
1926 | ||
1927 | if (bfd_stat (abfd, &statbuf) < 0) | |
1928 | goto error_return; | |
1929 | ||
1930 | if (statbuf.st_size != curpos) | |
1931 | { | |
1932 | (*_bfd_error_handler) | |
1933 | (_("%s: invalid mmo file: lop_end not last item in\ | |
1934 | file\n"), | |
1935 | bfd_get_filename (abfd)); | |
1936 | bfd_set_error (bfd_error_bad_value); | |
1937 | goto error_return; | |
1938 | } | |
1939 | ||
1940 | /* Check that the YZ field is right. Subtract the size of | |
1941 | this LOP_END in the calculation; YZ does not include | |
1942 | it. */ | |
1943 | if ((long) (y * 256 + z) * 4 != (curpos - stab_loc) - 4) | |
1944 | { | |
1945 | (*_bfd_error_handler) | |
1946 | (_("%s: invalid mmo file: YZ of lop_end (%ld)\ | |
1947 | not equal to the number of tetras to the preceding lop_stab (%ld)\n"), | |
1948 | bfd_get_filename (abfd), (long) (y * 256 + z), | |
1949 | (curpos - stab_loc - 4)/4); | |
1950 | bfd_set_error (bfd_error_bad_value); | |
1951 | goto error_return; | |
1952 | } | |
1953 | ||
1954 | bfd_map_over_sections (abfd, mmo_map_set_sizes, NULL); | |
1955 | goto done; | |
1956 | } | |
1957 | } | |
1958 | } | |
1959 | else | |
1960 | { | |
1961 | /* This wasn't a lopcode, so store it in the current section. */ | |
1962 | mmo_xore_32 (sec, vma & ~3, bfd_get_32 (abfd, buf)); | |
1963 | vma += 4; | |
1964 | vma &= ~3; | |
1965 | lineno++; | |
1966 | } | |
1967 | } | |
1968 | ||
1969 | /* We know this file is a multiple of four bytes (checked in | |
1970 | mmo_object_p), so if we got something other than 0, this was a bad | |
1971 | file (although it's more likely we'll get 0 in that case too). | |
1972 | If we got end-of-file, then there was no lop_stab, so the file has | |
1973 | invalid format. */ | |
1974 | ||
1975 | if (nbytes_read != 0) | |
1976 | bfd_set_error (bfd_error_system_call); | |
1977 | else | |
1978 | bfd_set_error (bfd_error_bad_value); | |
1979 | ||
1980 | error_return: | |
1981 | error = true; | |
1982 | done: | |
1983 | /* Mark the .text and .data section with their normal attribute if they | |
1984 | contain anything. This is not redundant wrt. mmo_decide_section, | |
1985 | since that code might never execute, and conversely the alloc+code | |
1986 | section flags must be set then. */ | |
1987 | sec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); | |
1988 | if (sec != NULL | |
1989 | && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) | |
1990 | && ! bfd_set_section_flags (abfd, sec, | |
1991 | bfd_get_section_flags (abfd, sec) | |
1992 | | SEC_ALLOC | SEC_LOAD | SEC_CODE)) | |
1993 | error = true; | |
1994 | ||
1995 | sec = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); | |
1996 | if (sec != NULL | |
1997 | && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) | |
1998 | && ! bfd_set_section_flags (abfd, sec, | |
1999 | bfd_get_section_flags (abfd, sec) | |
2000 | | SEC_ALLOC | SEC_LOAD)) | |
2001 | error = true; | |
2002 | ||
2003 | /* Free whatever resources we took. */ | |
2004 | for (i = 0; i < sizeof (file_names) / sizeof (file_names[0]); i++) | |
2005 | if (file_names[i]) | |
2006 | free (file_names[i]); | |
2007 | return error ? false : true; | |
2008 | } | |
2009 | ||
2010 | /* A hook to set up object file dependent section information. For mmo, | |
2011 | we point out the shape of allocated section contents. */ | |
2012 | ||
2013 | static boolean | |
2014 | mmo_new_section_hook (abfd, newsect) | |
2015 | bfd *abfd ATTRIBUTE_UNUSED; | |
2016 | asection *newsect; | |
2017 | { | |
2018 | /* We zero-fill all fields and assume NULL is represented by an all | |
2019 | zero-bit pattern. */ | |
2020 | newsect->used_by_bfd = | |
2021 | (PTR) bfd_zalloc (abfd, sizeof (struct mmo_section_data_struct)); | |
2022 | ||
2023 | if (!newsect->used_by_bfd) | |
2024 | return false; | |
2025 | ||
2026 | /* Always align to at least 32-bit words. */ | |
2027 | newsect->alignment_power = 2; | |
2028 | return true; | |
2029 | } | |
2030 | ||
2031 | /* We already have section contents loaded for sections that have | |
2032 | contents. */ | |
2033 | ||
2034 | static boolean | |
2035 | mmo_get_section_contents (abfd, sec, location, offset, bytes_to_do) | |
2036 | bfd *abfd ATTRIBUTE_UNUSED; | |
2037 | asection *sec ATTRIBUTE_UNUSED; | |
2038 | PTR location ATTRIBUTE_UNUSED; | |
2039 | file_ptr offset ATTRIBUTE_UNUSED; | |
2040 | bfd_size_type bytes_to_do ATTRIBUTE_UNUSED; | |
2041 | { | |
2042 | /* Iterate over diminishing chunk sizes, copying contents, like | |
2043 | mmo_set_section_contents. */ | |
2044 | while (bytes_to_do) | |
2045 | { | |
2046 | /* A minor song-and-dance to make sure we're not bitten by the | |
2047 | distant possibility of the cast from bfd_vma to int making the | |
2048 | chunk zero-sized. */ | |
2049 | int chunk_size | |
2050 | = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; | |
2051 | bfd_byte *loc; | |
2052 | ||
2053 | do | |
2054 | loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); | |
2055 | while (loc == NULL && (chunk_size /= 2) != 0); | |
2056 | ||
2057 | if (chunk_size == 0) | |
2058 | return false; | |
2059 | ||
2060 | memcpy (location, loc, chunk_size); | |
2061 | ||
2062 | location += chunk_size; | |
2063 | bytes_to_do -= chunk_size; | |
2064 | offset += chunk_size; | |
2065 | } | |
2066 | return true; | |
2067 | } | |
2068 | ||
2069 | /* Return the amount of memory needed to read the symbol table. */ | |
2070 | ||
2071 | static long | |
2072 | mmo_get_symtab_upper_bound (abfd) | |
2073 | bfd *abfd ATTRIBUTE_UNUSED; | |
2074 | { | |
2075 | return (abfd->symcount + 1) * sizeof (asymbol *); | |
2076 | } | |
2077 | ||
2078 | /* Sort mmo symbols by serial number. */ | |
2079 | ||
2080 | static int | |
2081 | mmo_sort_mmo_symbols (arg1, arg2) | |
2082 | CONST PTR arg1; | |
2083 | CONST PTR arg2; | |
2084 | { | |
2085 | CONST struct mmo_symbol *sym1 = *(CONST struct mmo_symbol **) arg1; | |
2086 | CONST struct mmo_symbol *sym2 = *(CONST struct mmo_symbol **) arg2; | |
2087 | ||
2088 | /* Sort by serial number first. */ | |
2089 | if (sym1->serno < sym2->serno) | |
2090 | return -1; | |
2091 | else if (sym1->serno > sym2->serno) | |
2092 | return 1; | |
2093 | ||
2094 | /* Then sort by address of the table entries. */ | |
2095 | return ((CONST char *) arg1 - (CONST char *) arg2); | |
2096 | } | |
2097 | ||
2098 | /* Translate the symbol table. */ | |
2099 | ||
2100 | static long | |
2101 | mmo_get_symtab (abfd, alocation) | |
2102 | bfd *abfd; | |
2103 | asymbol **alocation; | |
2104 | { | |
2105 | unsigned int symcount = bfd_get_symcount (abfd); | |
2106 | asymbol *csymbols; | |
2107 | unsigned int i; | |
2108 | ||
2109 | csymbols = abfd->tdata.mmo_data->csymbols; | |
2110 | if (csymbols == NULL) | |
2111 | { | |
2112 | asymbol *c; | |
2113 | struct mmo_symbol *s; | |
2114 | struct mmo_symbol **msp; | |
2115 | ||
2116 | /* First we store the symbols into the table we'll return, then we | |
2117 | qsort it on the serial number, with secondary on the address of | |
2118 | the symbol, to preserve order if there would be non-unique serial | |
2119 | numbers. */ | |
2120 | for (s = abfd->tdata.mmo_data->symbols, | |
2121 | msp = (struct mmo_symbol **) alocation; | |
2122 | s != NULL; | |
2123 | s = s->next, ++msp) | |
2124 | *msp = s; | |
2125 | ||
2126 | *msp = NULL; | |
2127 | ||
2128 | qsort (alocation, symcount, sizeof (struct mmo_symbol *), | |
2129 | mmo_sort_mmo_symbols); | |
2130 | ||
2131 | csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol)); | |
2132 | if (csymbols == NULL && symcount != 0) | |
2133 | return false; | |
2134 | abfd->tdata.mmo_data->csymbols = csymbols; | |
2135 | ||
2136 | for (msp = (struct mmo_symbol **) alocation, c = csymbols; | |
2137 | *msp != NULL; | |
2138 | msp++, ++c) | |
2139 | { | |
2140 | s = *msp; | |
2141 | c->the_bfd = abfd; | |
2142 | c->name = s->name; | |
2143 | c->value = s->value; | |
2144 | c->flags = BSF_GLOBAL; | |
2145 | ||
2146 | if (s->sym_type == mmo_data_sym) | |
2147 | { | |
2148 | c->section | |
2149 | = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); | |
2150 | ||
2151 | if (c->section == NULL) | |
2152 | c->section = bfd_abs_section_ptr; | |
2153 | else | |
2154 | c->value -= c->section->vma; | |
2155 | } | |
2156 | else if (s->sym_type == mmo_undef_sym) | |
2157 | c->section = bfd_und_section_ptr; | |
2158 | else if (s->sym_type == mmo_reg_sym) | |
2159 | { | |
2160 | c->section | |
2161 | = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); | |
2162 | } | |
2163 | else | |
2164 | { | |
2165 | asection *textsec | |
2166 | = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); | |
2167 | ||
2168 | if (textsec != NULL | |
2169 | && c->value >= textsec->vma | |
2170 | && c->value <= textsec->vma + textsec->_cooked_size) | |
2171 | { | |
2172 | c->section = textsec; | |
2173 | c->value -= c->section->vma; | |
2174 | } | |
2175 | else | |
2176 | c->section = bfd_abs_section_ptr; | |
2177 | } | |
2178 | ||
2179 | c->udata.p = NULL; | |
2180 | } | |
2181 | } | |
2182 | ||
2183 | /* Last, overwrite the incoming table with the right-type entries. */ | |
2184 | for (i = 0; i < symcount; i++) | |
2185 | *alocation++ = csymbols++; | |
2186 | *alocation = NULL; | |
2187 | ||
2188 | return symcount; | |
2189 | } | |
2190 | ||
2191 | /* Make an empty symbol. */ | |
2192 | ||
2193 | static asymbol * | |
2194 | mmo_make_empty_symbol (abfd) | |
2195 | bfd *abfd; | |
2196 | { | |
2197 | asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol)); | |
2198 | ||
2199 | if (new) | |
2200 | new->the_bfd = abfd; | |
2201 | return new; | |
2202 | } | |
2203 | ||
2204 | /* Get information about a symbol. */ | |
2205 | ||
2206 | static void | |
2207 | mmo_get_symbol_info (ignore_abfd, symbol, ret) | |
2208 | bfd *ignore_abfd ATTRIBUTE_UNUSED; | |
2209 | asymbol *symbol; | |
2210 | symbol_info *ret; | |
2211 | { | |
2212 | bfd_symbol_info (symbol, ret); | |
2213 | } | |
2214 | ||
2215 | static void | |
2216 | mmo_print_symbol (abfd, afile, symbol, how) | |
2217 | bfd *abfd; | |
2218 | PTR afile; | |
2219 | asymbol *symbol; | |
2220 | bfd_print_symbol_type how; | |
2221 | { | |
2222 | FILE *file = (FILE *) afile; | |
2223 | ||
2224 | switch (how) | |
2225 | { | |
2226 | case bfd_print_symbol_name: | |
2227 | fprintf (file, "%s", symbol->name); | |
2228 | break; | |
2229 | default: | |
2230 | bfd_print_symbol_vandf (abfd, (PTR) file, symbol); | |
2231 | ||
2232 | fprintf (file, " %-5s %s", | |
2233 | symbol->section->name, | |
2234 | symbol->name); | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | /* We can't map a file directly into executable code, so the | |
2239 | size of header information is irrelevant. */ | |
2240 | ||
2241 | static int | |
2242 | mmo_sizeof_headers (abfd, exec) | |
2243 | bfd *abfd ATTRIBUTE_UNUSED; | |
2244 | boolean exec ATTRIBUTE_UNUSED; | |
2245 | { | |
2246 | return 0; | |
2247 | } | |
2248 | ||
2249 | /* Write the (section-neutral) file preamble. */ | |
2250 | ||
2251 | static boolean | |
2252 | mmo_internal_write_header (abfd) | |
2253 | bfd *abfd; | |
2254 | { | |
2255 | CONST char lop_pre_bfd[] = { LOP, LOP_PRE, 1, 1}; | |
2256 | ||
2257 | if (bfd_bwrite (lop_pre_bfd, 4, abfd) != 4) | |
2258 | return false; | |
2259 | ||
2260 | /* Copy creation time of original file. */ | |
2261 | if (bfd_bwrite (abfd->tdata.mmo_data->created, 4, abfd) != 4) | |
2262 | return false; | |
2263 | ||
2264 | return true; | |
2265 | } | |
2266 | ||
2267 | /* Write the LOP_POST record, with global register initializations. | |
2268 | Z is the Z field of the LOP_POST, corresponding to 255 - number of | |
2269 | registers at DATA. The Z = 255 field is filled in with the | |
2270 | start-address. */ | |
2271 | ||
2272 | static boolean | |
2273 | mmo_internal_write_post (abfd, z, sec) | |
2274 | bfd *abfd; | |
2275 | int z; | |
2276 | asection *sec; | |
2277 | { | |
2278 | int i; | |
2279 | bfd_byte buf[8]; | |
2280 | mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_POST << 16) | z); | |
2281 | ||
2282 | for (i = z; i < 255; i++) | |
2283 | { | |
2284 | bfd_byte *data = mmo_get_loc (sec, i * 8, 8); | |
2285 | ||
2286 | if (bfd_bwrite (data, 8, abfd) != 8) | |
2287 | return false; | |
2288 | } | |
2289 | ||
2290 | /* For Z == $255, we always emit the start location; supposedly Main, | |
2291 | but we have it handy at bfd_get_start_address. If we're called with | |
2292 | Z == 255, don't assume DATA is valid. */ | |
2293 | bfd_put_64 (abfd, bfd_get_start_address (abfd), buf); | |
2294 | ||
2295 | return | |
2296 | abfd->tdata.mmo_data->have_error == false | |
2297 | && bfd_bwrite (buf, 8, abfd) == 8; | |
2298 | } | |
2299 | ||
2300 | /* Translate to and from BFD flags. This is to make sure that we don't | |
2301 | get bitten by BFD flag number changes. */ | |
2302 | ||
2303 | static flagword | |
2304 | mmo_sec_flags_from_bfd_flags (flags) | |
2305 | flagword flags; | |
2306 | { | |
2307 | flagword oflags = 0; | |
2308 | ||
2309 | if (flags & SEC_ALLOC) | |
2310 | oflags |= MMO_SEC_ALLOC; | |
2311 | if (flags & SEC_LOAD) | |
2312 | oflags |= MMO_SEC_LOAD; | |
2313 | if (flags & SEC_RELOC) | |
2314 | oflags |= MMO_SEC_RELOC; | |
2315 | if (flags & SEC_READONLY) | |
2316 | oflags |= MMO_SEC_READONLY; | |
2317 | if (flags & SEC_CODE) | |
2318 | oflags |= MMO_SEC_CODE; | |
2319 | if (flags & SEC_DATA) | |
2320 | oflags |= MMO_SEC_DATA; | |
2321 | if (flags & SEC_NEVER_LOAD) | |
2322 | oflags |= MMO_SEC_NEVER_LOAD; | |
2323 | if (flags & SEC_IS_COMMON) | |
2324 | oflags |= MMO_SEC_IS_COMMON; | |
2325 | if (flags & SEC_DEBUGGING) | |
2326 | oflags |= MMO_SEC_DEBUGGING; | |
2327 | ||
2328 | return oflags; | |
2329 | } | |
2330 | ||
2331 | static flagword | |
2332 | bfd_sec_flags_from_mmo_flags (flags) | |
2333 | flagword flags; | |
2334 | { | |
2335 | flagword oflags = 0; | |
2336 | ||
2337 | if (flags & MMO_SEC_ALLOC) | |
2338 | oflags |= SEC_ALLOC; | |
2339 | if (flags & MMO_SEC_LOAD) | |
2340 | oflags |= SEC_LOAD; | |
2341 | if (flags & MMO_SEC_RELOC) | |
2342 | oflags |= SEC_RELOC; | |
2343 | if (flags & MMO_SEC_READONLY) | |
2344 | oflags |= SEC_READONLY; | |
2345 | if (flags & MMO_SEC_CODE) | |
2346 | oflags |= SEC_CODE; | |
2347 | if (flags & MMO_SEC_DATA) | |
2348 | oflags |= SEC_DATA; | |
2349 | if (flags & MMO_SEC_NEVER_LOAD) | |
2350 | oflags |= SEC_NEVER_LOAD; | |
2351 | if (flags & MMO_SEC_IS_COMMON) | |
2352 | oflags |= SEC_IS_COMMON; | |
2353 | if (flags & MMO_SEC_DEBUGGING) | |
2354 | oflags |= SEC_DEBUGGING; | |
2355 | ||
2356 | return oflags; | |
2357 | } | |
2358 | ||
2359 | /* Write a section. */ | |
2360 | ||
2361 | static boolean | |
2362 | mmo_internal_write_section (abfd, sec) | |
2363 | bfd *abfd; | |
2364 | asection *sec; | |
2365 | { | |
2366 | /* We do it differently depending on what section this is: | |
2367 | ||
2368 | ".text": Output, prepended by information about the first source file | |
2369 | (not yet implemented.) | |
2370 | ||
2371 | ".data": Output. | |
2372 | ||
2373 | (".MMIX.reg_contents": Not handled here.) | |
2374 | ||
2375 | Anything else: Output inside a lop_spec 80, in the format described | |
2376 | above. */ | |
2377 | ||
2378 | if (strcmp (sec->name, MMO_TEXT_SECTION_NAME) == 0) | |
2379 | /* FIXME: Output source file name and line number. */ | |
2380 | return | |
2381 | mmo_write_loc_chunk_list (abfd, | |
2382 | ((struct mmo_section_data_struct *) | |
2383 | (sec->used_by_bfd))->head); | |
2384 | else if (strcmp (sec->name, MMO_DATA_SECTION_NAME) == 0) | |
2385 | return | |
2386 | mmo_write_loc_chunk_list (abfd, | |
2387 | ((struct mmo_section_data_struct *) | |
2388 | (sec->used_by_bfd))->head); | |
2389 | else if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
2390 | /* Not handled here. */ | |
2391 | { | |
2392 | /* This would normally be an abort call since this can't happen, but | |
2393 | we don't do that. */ | |
2394 | bfd_set_error (bfd_error_bad_value); | |
2395 | return false; | |
2396 | } | |
2397 | else if (strncmp (sec->name, MMIX_OTHER_SPEC_SECTION_PREFIX, | |
2398 | strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)) == 0) | |
2399 | { | |
2400 | int n = atoi (sec->name + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)); | |
2401 | mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_SPEC << 16) | n); | |
2402 | return | |
2403 | abfd->tdata.mmo_data->have_error == false | |
2404 | && mmo_write_chunk_list (abfd, | |
2405 | ((struct mmo_section_data_struct *) | |
2406 | (sec->used_by_bfd))->head); | |
2407 | } | |
2408 | /* Ignore sections that are just allocated or empty; we write out | |
2409 | _contents_ here. */ | |
2410 | else if ((bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) != 0 | |
2411 | && sec->_raw_size != 0) | |
2412 | { | |
2413 | /* Keep the document-comment formatted the way it is. */ | |
2414 | /* | |
2415 | INODE | |
2416 | mmo section mapping, , Symbol-table, mmo | |
2417 | SUBSECTION | |
2418 | mmo section mapping | |
2419 | ||
2420 | The implementation in BFD uses special data type 80 (decimal) to | |
2421 | encapsulate and describe named sections, containing e.g.@: debug | |
2422 | information. If needed, any datum in the encapsulation will be | |
2423 | quoted using lop_quote. First comes a 32-bit word holding the | |
2424 | number of 32-bit words containing the zero-terminated zero-padded | |
2425 | segment name. After the name there's a 32-bit word holding flags | |
2426 | describing the section type. Then comes a 64-bit big-endian word | |
2427 | with the section length (in bytes), then another with the section | |
2428 | start address. Depending on the type of section, the contents | |
2429 | might follow, zero-padded to 32-bit boundary. For a loadable | |
2430 | section (such as data or code), the contents might follow at some | |
2431 | later point, not necessarily immediately, as a lop_loc with the | |
2432 | same start address as in the section description, followed by the | |
2433 | contents. This in effect forms a descriptor that must be emitted | |
2434 | before the actual contents. Sections described this way must not | |
2435 | overlap. | |
2436 | ||
2437 | For areas that don't have such descriptors, synthetic sections are | |
2438 | formed by BFD. Consecutive contents in the two memory areas | |
2439 | @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} and | |
2440 | @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} are entered in | |
2441 | sections named <<.text>> and <<.data>> respectively. If an area | |
2442 | is not otherwise described, but would together with a neighboring | |
2443 | lower area be less than @samp{0x40000000} bytes long, it is joined | |
2444 | with the lower area and the gap is zero-filled. For other cases, | |
2445 | a new section is formed, named <<.MMIX.sec.@var{n}>>. Here, | |
2446 | @var{n} is a number, a running count through the mmo file, | |
2447 | starting at 0. | |
2448 | ||
2449 | EXAMPLE | |
2450 | A loadable section specified as: | |
2451 | ||
2452 | | .section secname,"ax" | |
2453 | | TETRA 1,2,3,4,-1,-2009 | |
2454 | | BYTE 80 | |
2455 | ||
2456 | and linked to address @samp{0x4}, is represented by the sequence: | |
2457 | ||
2458 | | 0x98080050 - lop_spec 80 | |
2459 | | 0x00000002 - two 32-bit words for the section name | |
2460 | | 0x7365636e - "secn" | |
2461 | | 0x616d6500 - "ame\0" | |
2462 | | 0x00000033 - flags CODE, READONLY, LOAD, ALLOC | |
2463 | | 0x00000000 - high 32 bits of section length | |
2464 | | 0x0000001c - section length is 28 bytes; 6 * 4 + 1 + alignment to 32 bits | |
2465 | | 0x00000000 - high 32 bits of section address | |
2466 | | 0x00000004 - section address is 4 | |
2467 | | 0x98010002 - 64 bits with address of following data | |
2468 | | 0x00000000 - high 64 bits of address | |
2469 | | 0x00000004 - data starts at address 4 | |
2470 | | 0x00000001 - 1 | |
2471 | | 0x00000002 - 2 | |
2472 | | 0x00000003 - 3 | |
2473 | | 0x00000004 - 4 | |
2474 | | 0xffffffff - -1 | |
2475 | | 0xfffff827 - -2009 | |
2476 | | 0x50000000 - 80 as a byte, padded with zeros. | |
2477 | ||
2478 | Note that the lop_spec wrapping does not include the section | |
2479 | contents. Compare this to a non-loaded section specified as: | |
2480 | ||
2481 | | .section thirdsec | |
2482 | | TETRA 200001,100002 | |
2483 | | BYTE 38,40 | |
2484 | ||
2485 | This, when linked to address @samp{0x200000000000001c}, is | |
2486 | represented by: | |
2487 | ||
2488 | | 0x98080050 - lop_spec 80 | |
2489 | | 0x00000002 - two 32-bit words for the section name | |
2490 | | 0x7365636e - "thir" | |
2491 | | 0x616d6500 - "dsec" | |
2492 | | 0x00000010 - flag READONLY | |
2493 | | 0x00000000 - high 32 bits of section length | |
2494 | | 0x0000000c - section length is 12 bytes; 2 * 4 + 2 + alignment to 32 bits | |
2495 | | 0x20000000 - high 64 bits of address | |
2496 | | 0x0000001c - low 64 bits of address 0x200000000000001c | |
2497 | | 0x00030d41 - 200001 | |
2498 | | 0x000186a2 - 100002 | |
2499 | | 0x26280000 - 38, 40 as bytes, padded with zeros | |
2500 | ||
2501 | For the latter example, the section contents must not to appear | |
2502 | loaded in memory, and is therefore specified as part of the | |
2503 | special data. The address is usually unimportant but might | |
2504 | provide information for e.g.@: the DWARF 2 debugging format. */ | |
2505 | ||
2506 | mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION); | |
2507 | mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4); | |
2508 | mmo_write_chunk (abfd, sec->name, strlen (sec->name)); | |
2509 | /* FIXME: We can get debug sections (.debug_line & Co.) with a | |
2510 | section flag still having SEC_RELOC set. Investigate. This | |
2511 | might be true for all alien sections; perhaps mmo.em should clear | |
2512 | that flag. Might be related to weak references. */ | |
2513 | mmo_write_tetra (abfd, | |
2514 | mmo_sec_flags_from_bfd_flags | |
2515 | (bfd_get_section_flags (abfd, sec))); | |
2516 | mmo_write_octa (abfd, sec->_raw_size); | |
2517 | mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec)); | |
2518 | ||
2519 | /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually | |
2520 | loaded. */ | |
2521 | if (bfd_get_section_flags (abfd, sec) & SEC_LOAD) | |
2522 | return | |
2523 | abfd->tdata.mmo_data->have_error == false | |
2524 | && mmo_write_loc_chunk_list (abfd, | |
2525 | ((struct mmo_section_data_struct *) | |
2526 | (sec->used_by_bfd))->head); | |
2527 | return | |
2528 | abfd->tdata.mmo_data->have_error == false | |
2529 | && mmo_write_chunk_list (abfd, | |
2530 | ((struct mmo_section_data_struct *) | |
2531 | (sec->used_by_bfd))->head); | |
2532 | } | |
2533 | return true; | |
2534 | } | |
2535 | ||
2536 | /* We save up all data before output. */ | |
2537 | ||
2538 | static boolean | |
2539 | mmo_set_section_contents (abfd, sec, location, offset, bytes_to_do) | |
2540 | bfd *abfd ATTRIBUTE_UNUSED; | |
2541 | sec_ptr sec; | |
2542 | PTR location; | |
2543 | file_ptr offset; | |
2544 | bfd_size_type bytes_to_do; | |
2545 | { | |
2546 | /* Iterate over diminishing chunk sizes, copying contents. */ | |
2547 | while (bytes_to_do) | |
2548 | { | |
2549 | /* A minor song-and-dance to make sure we're not bitten by the | |
2550 | distant possibility of the cast from bfd_vma to int making the | |
2551 | chunk zero-sized. */ | |
2552 | int chunk_size | |
2553 | = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; | |
2554 | bfd_byte *loc; | |
2555 | ||
2556 | do | |
2557 | loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); | |
2558 | while (loc == NULL && (chunk_size /= 2) != 0); | |
2559 | ||
2560 | if (chunk_size == 0) | |
2561 | return false; | |
2562 | ||
2563 | memcpy (loc, location, chunk_size); | |
2564 | ||
2565 | location += chunk_size; | |
2566 | bytes_to_do -= chunk_size; | |
2567 | offset += chunk_size; | |
2568 | } | |
2569 | return true; | |
2570 | } | |
2571 | ||
2572 | /* Add a symbol to a trie-tree. */ | |
2573 | ||
2574 | static boolean | |
2575 | mmo_internal_add_3_sym (abfd, rootp, symp) | |
2576 | bfd *abfd; | |
2577 | struct mmo_symbol_trie *rootp; | |
2578 | CONST struct mmo_symbol *symp; | |
2579 | { | |
2580 | CONST char *name = symp->name; | |
2581 | struct mmo_symbol_trie *trie = rootp; | |
2582 | struct mmo_symbol_trie **triep = NULL; | |
2583 | ||
2584 | while (*name && trie != NULL) | |
2585 | { | |
2586 | if (*name < trie->symchar) | |
2587 | { | |
2588 | triep = &trie->left; | |
2589 | trie = trie->left; | |
2590 | } | |
2591 | else if (*name > trie->symchar) | |
2592 | { | |
2593 | triep = &trie->right; | |
2594 | trie = trie->right; | |
2595 | } | |
2596 | else if (*name == trie->symchar) | |
2597 | { | |
2598 | triep = &trie->middle; | |
2599 | name++; | |
2600 | ||
2601 | /* Make sure "trie" points to where we should fill in the | |
2602 | current symbol whenever we've iterated through "name". We | |
2603 | would lose the right position if we encounter "foobar" then | |
2604 | "foo". */ | |
2605 | if (*name) | |
2606 | trie = trie->middle; | |
2607 | } | |
2608 | } | |
2609 | ||
2610 | while (*name != 0) | |
2611 | { | |
2612 | /* Create middle branches for the rest of the characters. */ | |
2613 | trie = bfd_zalloc (abfd, sizeof (struct mmo_symbol_trie)); | |
2614 | *triep = trie; | |
2615 | trie->symchar = *name++; | |
2616 | triep = &trie->middle; | |
2617 | } | |
2618 | ||
2619 | /* We discover a duplicate symbol rather late in the process, but still; | |
2620 | we discover it and bail out. */ | |
2621 | if (trie->sym.name != NULL) | |
2622 | { | |
2623 | (*_bfd_error_handler) | |
2624 | (_("%s: invalid symbol table: duplicate symbol `%s'\n"), | |
2625 | bfd_get_filename (abfd), trie->sym.name); | |
2626 | bfd_set_error (bfd_error_bad_value); | |
2627 | return false; | |
2628 | } | |
2629 | ||
2630 | memcpy (&trie->sym, symp, sizeof *symp); | |
2631 | return true; | |
2632 | } | |
2633 | ||
2634 | /* Find out the length of the serialized version of a trie in bytes. */ | |
2635 | ||
2636 | static unsigned int | |
2637 | mmo_internal_3_length (abfd, trie) | |
2638 | bfd *abfd; | |
2639 | struct mmo_symbol_trie *trie; | |
2640 | { | |
2641 | /* First, one for the control byte. */ | |
2642 | unsigned int length = 1; | |
2643 | ||
2644 | if (trie == NULL) | |
2645 | return 0; | |
2646 | ||
2647 | /* Add in the recursion to the left. */ | |
2648 | length += mmo_internal_3_length (abfd, trie->left); | |
2649 | ||
2650 | /* Add in the middle trie and the character. */ | |
2651 | length += 1 + mmo_internal_3_length (abfd, trie->middle); | |
2652 | ||
2653 | /* Add in the recursion to the right. */ | |
2654 | length += mmo_internal_3_length (abfd, trie->right); | |
2655 | ||
2656 | /* Add in bytes for the symbol (if this is an endnode). */ | |
2657 | if (trie->sym.name != NULL) | |
2658 | { | |
2659 | unsigned int serno = trie->sym.serno; | |
2660 | ||
2661 | /* First what it takes to encode the value. */ | |
2662 | if (trie->sym.sym_type == mmo_reg_sym) | |
2663 | length++; | |
2664 | else if (trie->sym.sym_type == mmo_undef_sym) | |
2665 | length += 2; | |
2666 | else | |
2667 | { | |
2668 | bfd_vma value = trie->sym.value; | |
2669 | ||
2670 | /* Coded in one to eight following bytes. */ | |
2671 | if (trie->sym.sym_type == mmo_data_sym) | |
2672 | value -= (bfd_vma) 0x20 << 56; | |
2673 | ||
2674 | do | |
2675 | { | |
2676 | value >>= 8; | |
2677 | length++; | |
2678 | } | |
2679 | while (value != 0); | |
2680 | } | |
2681 | ||
2682 | /* Find out what it takes to encode the serial number. */ | |
2683 | do | |
2684 | { | |
2685 | serno >>= 7; | |
2686 | length++; | |
2687 | } | |
2688 | while (serno != 0); | |
2689 | } | |
2690 | ||
2691 | return length; | |
2692 | } | |
2693 | ||
2694 | /* Helper function for outputting the serial number of a symbol, output as | |
2695 | a variant of leb128 (see dwarf2 documentation) which could be called | |
2696 | beb128. Using a helper function and recursion simplifies debugging. */ | |
2697 | ||
2698 | static void | |
2699 | mmo_beb128_out (abfd, serno, marker) | |
2700 | bfd *abfd; | |
2701 | int serno; | |
2702 | int marker; | |
2703 | { | |
2704 | if (serno & ~0x7f) | |
2705 | mmo_beb128_out (abfd, serno >> 7, 0); | |
2706 | mmo_write_byte (abfd, marker | (serno & 0x7f)); | |
2707 | } | |
2708 | ||
2709 | /* Serialize a trie. */ | |
2710 | ||
2711 | static void | |
2712 | mmo_internal_3_dump (abfd, trie) | |
2713 | bfd *abfd; | |
2714 | struct mmo_symbol_trie *trie; | |
2715 | { | |
2716 | bfd_byte control = 0; | |
2717 | ||
2718 | if (trie == NULL) | |
2719 | return; | |
2720 | ||
2721 | if (trie->left) | |
2722 | control |= MMO3_LEFT; | |
2723 | ||
2724 | if (trie->middle) | |
2725 | control |= MMO3_MIDDLE; | |
2726 | ||
2727 | if (trie->right) | |
2728 | control |= MMO3_RIGHT; | |
2729 | ||
2730 | if (trie->sym.name != NULL) | |
2731 | { | |
2732 | /* Encode the symbol type and length of value bytes. */ | |
2733 | if (trie->sym.sym_type == mmo_reg_sym) | |
2734 | control |= MMO3_REGQUAL_BITS; | |
2735 | else if (trie->sym.sym_type == mmo_undef_sym) | |
2736 | control |= MMO3_UNDEF; | |
2737 | else | |
2738 | { | |
2739 | bfd_vma value = trie->sym.value; | |
2740 | ||
2741 | /* Coded in 1..8 following bytes. */ | |
2742 | if (trie->sym.sym_type == mmo_data_sym) | |
2743 | { | |
2744 | control |= MMO3_DATA; | |
2745 | value -= (bfd_vma) 0x20 << 56; | |
2746 | } | |
2747 | ||
2748 | do | |
2749 | { | |
2750 | value >>= 8; | |
2751 | control++; | |
2752 | } | |
2753 | while (value != 0); | |
2754 | } | |
2755 | } | |
2756 | ||
2757 | /* The control byte is output before recursing. */ | |
2758 | mmo_write_byte (abfd, control); | |
2759 | ||
2760 | mmo_internal_3_dump (abfd, trie->left); | |
2761 | ||
2762 | if (control & MMO3_SYMBITS) | |
2763 | { | |
2764 | mmo_write_byte (abfd, trie->symchar); | |
2765 | ||
2766 | if (trie->sym.name != NULL) | |
2767 | { | |
2768 | if (trie->sym.sym_type == mmo_reg_sym) | |
2769 | mmo_write_byte (abfd, trie->sym.value); | |
2770 | else if (trie->sym.sym_type == mmo_undef_sym) | |
2771 | { | |
2772 | mmo_write_byte (abfd, 0); | |
2773 | mmo_write_byte (abfd, 0); | |
2774 | } | |
2775 | else | |
2776 | { | |
2777 | bfd_vma value = trie->sym.value; | |
2778 | ||
2779 | bfd_byte byte_n = control & 15; | |
2780 | ||
2781 | /* Coded in 1..8 following bytes. Note that the value is | |
2782 | shifted out big-endian. */ | |
2783 | if (trie->sym.sym_type == mmo_data_sym) | |
2784 | { | |
2785 | value -= (bfd_vma) 0x20 << 56; | |
2786 | byte_n -= 8; | |
2787 | } | |
2788 | ||
2789 | do | |
2790 | { | |
2791 | mmo_write_byte (abfd, (value >> ((byte_n - 1) * 8)) & 0xff); | |
2792 | byte_n--; | |
2793 | } | |
2794 | while (byte_n != 0); | |
2795 | } | |
2796 | ||
2797 | mmo_beb128_out (abfd, trie->sym.serno, 128); | |
2798 | } | |
2799 | mmo_internal_3_dump (abfd, trie->middle); | |
2800 | } | |
2801 | mmo_internal_3_dump (abfd, trie->right); | |
2802 | } | |
2803 | ||
2804 | /* Write symbols, either in mmo format or hidden in a lop_spec 80 section. | |
2805 | Write the lop_end terminator also. */ | |
2806 | ||
2807 | static boolean | |
2808 | mmo_write_symbols_and_terminator (abfd) | |
2809 | bfd *abfd; | |
2810 | { | |
2811 | int count = bfd_get_symcount (abfd); | |
2812 | asymbol *fakemain[2]; | |
2813 | asymbol **table; | |
2814 | int serno = 2; | |
2815 | struct mmo_symbol_trie root; | |
2816 | int trie_len; | |
2817 | int i; | |
2818 | bfd_byte buf[4]; | |
2819 | ||
2820 | /* Create a symbol for "Main". */ | |
2821 | asymbol *mainsym = bfd_make_empty_symbol (abfd); | |
2822 | ||
2823 | mainsym->flags = BSF_GLOBAL; | |
2824 | mainsym->value = bfd_get_start_address (abfd); | |
2825 | mainsym->name = MMIX_START_SYMBOL_NAME; | |
2826 | mainsym->section = bfd_abs_section_ptr; | |
2827 | fakemain[0] = mainsym; | |
2828 | fakemain[1] = NULL; | |
2829 | ||
2830 | memset (&root, 0, sizeof (root)); | |
2831 | ||
2832 | /* Make all symbols take a left turn. */ | |
2833 | root.symchar = 0xff; | |
2834 | ||
2835 | /* There must always be a ":Main", so we'll add one | |
2836 | if there are no symbols. */ | |
2837 | if (count == 0) | |
2838 | { | |
2839 | table = fakemain; | |
2840 | count = 1; | |
2841 | } | |
2842 | else | |
2843 | table = bfd_get_outsymbols (abfd); | |
2844 | ||
2845 | for (i = 0; i < count && table[i] != NULL; i++) | |
2846 | { | |
2847 | asymbol *s = table[i]; | |
2848 | ||
2849 | /* It's not enough to consult bfd_is_local_label, since it does not | |
2850 | mean "local" in the sense of linkable-and-observable-after-link. | |
2851 | Let's just check the BSF_GLOBAL flag. | |
2852 | ||
2853 | Also, don't export symbols with characters not in the allowed set. */ | |
2854 | if ((s->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL | |
2855 | && strspn (s->name, | |
2856 | valid_mmo_symbol_character_set) == strlen (s->name)) | |
2857 | { | |
2858 | struct mmo_symbol sym; | |
2859 | memset (&sym, 0, sizeof (sym)); | |
2860 | ||
2861 | sym.name = s->name; | |
2862 | sym.value = | |
2863 | s->value | |
2864 | + s->section->output_section->vma | |
2865 | + s->section->output_offset; | |
2866 | ||
2867 | if (bfd_is_und_section (s->section)) | |
2868 | sym.sym_type = mmo_undef_sym; | |
2869 | else if (strcmp (s->section->name, MMO_DATA_SECTION_NAME) == 0 | |
2870 | /* The encoding of data symbols require that the "rest" | |
2871 | of the value fits in 6 bytes, so the upper two bytes | |
2872 | must be 0x2000. All other symbols get to be the | |
2873 | absolute type. */ | |
2874 | && (sym.value >> 48) == 0x2000) | |
2875 | sym.sym_type = mmo_data_sym; | |
2876 | else if (strcmp (s->section->name, MMIX_REG_SECTION_NAME) == 0) | |
2877 | sym.sym_type = mmo_reg_sym; | |
2878 | else if (strcmp (s->section->name, | |
2879 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
2880 | { | |
2881 | sym.sym_type = mmo_reg_sym; | |
2882 | sym.value /= 8; | |
2883 | } | |
2884 | else | |
2885 | sym.sym_type = mmo_abs_sym; | |
2886 | ||
2887 | /* FIXME: We assume the order of the received symbols is an | |
2888 | ordered mapping of the serial numbers. This is not | |
2889 | necessarily true if we e.g. objcopy a mmo file to another and | |
2890 | there are gaps in the numbering. Note sure if this can | |
2891 | happen. Not sure what to do. */ | |
2892 | /* Make sure Main has serial number 1; others start at 2. */ | |
2893 | if (strcmp (s->name, MMIX_START_SYMBOL_NAME) == 0) | |
2894 | { | |
2895 | sym.serno = 1; | |
2896 | ||
2897 | /* Check that the value assigned to :Main is the same as the | |
2898 | entry address. The default linker script asserts this. | |
2899 | This is as good a place as any to check this consistency. */ | |
2900 | if (sym.value != bfd_get_start_address (abfd)) | |
2901 | { | |
2902 | /* Arbitrary buffer to hold the printable representation | |
2903 | of a vma. */ | |
2904 | char vmas_main[40]; | |
2905 | char vmas_start[40]; | |
2906 | bfd_vma vma_start = bfd_get_start_address (abfd); | |
2907 | ||
2908 | sprintf_vma (vmas_main, s->value); | |
2909 | sprintf_vma (vmas_start, vma_start); | |
2910 | ||
2911 | (*_bfd_error_handler) | |
2912 | (_("%s: Bad symbol definition: `Main' set to %s rather\ | |
2913 | than the start address %s\n"), | |
2914 | bfd_get_filename (abfd), vmas_main, vmas_start); | |
2915 | bfd_set_error (bfd_error_bad_value); | |
2916 | return false; | |
2917 | } | |
2918 | } | |
2919 | else | |
2920 | sym.serno = serno++; | |
2921 | ||
2922 | if (! mmo_internal_add_3_sym (abfd, &root, &sym)) | |
2923 | return false; | |
2924 | } | |
2925 | } | |
2926 | ||
2927 | /* Change the root node to be a ":"-prefix. */ | |
2928 | root.symchar = ':'; | |
2929 | root.middle = root.left; | |
2930 | root.right = NULL; | |
2931 | root.left = NULL; | |
2932 | ||
2933 | /* We have to find out if we can fit the whole symbol table in the mmo | |
2934 | symtab. It would be bad to assume we can always fit it in 262144 | |
2935 | bytes. If we can't, just leave the Main symbol. */ | |
2936 | trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; | |
2937 | ||
2938 | if (trie_len > 0xffff) | |
2939 | { | |
2940 | /* Test this code by using a lower limit in the test above and check | |
2941 | that the single "Main" symbol is emitted and handled properly. | |
2942 | There's no specific test-case. */ | |
2943 | struct mmo_symbol sym; | |
2944 | ||
2945 | (*_bfd_error_handler) | |
2946 | (_("%s: warning: symbol table too large for mmo, larger than 65535\ | |
2947 | 32-bit words: %d. Only `Main' will be emitted.\n"), | |
2948 | bfd_get_filename (abfd), trie_len); | |
2949 | ||
2950 | memset (&sym, 0, sizeof (sym)); | |
2951 | sym.sym_type = mmo_abs_sym; | |
2952 | sym.name = MMIX_START_SYMBOL_NAME; | |
2953 | sym.serno = 1; | |
2954 | sym.value = bfd_get_start_address (abfd); | |
2955 | ||
2956 | /* Then patch up a symbol table to be just the ":Main" symbol. */ | |
2957 | memset (&root, 0, sizeof (root)); | |
2958 | root.left = root.middle; | |
2959 | root.symchar = 0xff; | |
2960 | root.middle = NULL; | |
2961 | root.right = NULL; | |
2962 | ||
2963 | if (! mmo_internal_add_3_sym (abfd, &root, &sym)) | |
2964 | return false; | |
2965 | ||
2966 | root.symchar = ':'; | |
2967 | root.middle = root.left; | |
2968 | root.right = NULL; | |
2969 | root.left = NULL; | |
2970 | ||
2971 | trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; | |
2972 | } | |
2973 | ||
2974 | /* Reset the written-bytes counter. */ | |
2975 | abfd->tdata.mmo_data->byte_no = 0; | |
2976 | ||
2977 | /* Put out the lop_stab mark. */ | |
2978 | bfd_put_32 (abfd, (LOP << 24) | (LOP_STAB << 16), buf); | |
2979 | if (bfd_bwrite (buf, 4, abfd) != 4) | |
2980 | return false; | |
2981 | ||
2982 | /* Dump out symbols. */ | |
2983 | mmo_internal_3_dump (abfd, &root); | |
2984 | ||
2985 | if (trie_len != (abfd->tdata.mmo_data->byte_no + 3)/4) | |
2986 | { | |
2987 | /* I haven't seen this trig. It seems no use claiming this case | |
2988 | isn't debugged and abort if we get here. Instead emit a | |
2989 | diagnostic and fail "normally". */ | |
2990 | (*_bfd_error_handler) | |
2991 | (_("%s: internal error, symbol table changed size from %d to %d\ | |
2992 | words\n"), | |
2993 | bfd_get_filename (abfd), trie_len, | |
2994 | (abfd->tdata.mmo_data->byte_no + 3)/4); | |
2995 | bfd_set_error (bfd_error_bad_value); | |
2996 | return false; | |
2997 | } | |
2998 | ||
2999 | /* Dump out remaining bytes in the buffer and handle I/O errors by | |
3000 | propagating errors. */ | |
3001 | if ((abfd->tdata.mmo_data->byte_no % 4) != 0 | |
3002 | || abfd->tdata.mmo_data->have_error) | |
3003 | { | |
3004 | memset (abfd->tdata.mmo_data->buf + (abfd->tdata.mmo_data->byte_no % 4), | |
3005 | 0, 4 - (abfd->tdata.mmo_data->byte_no % 4)); | |
3006 | ||
3007 | if (abfd->tdata.mmo_data->have_error | |
3008 | || bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) | |
3009 | return false; | |
3010 | } | |
3011 | ||
3012 | bfd_put_32 (abfd, (LOP << 24) | (LOP_END << 16) | trie_len, buf); | |
3013 | return bfd_bwrite (buf, 4, abfd) == 4; | |
3014 | } | |
3015 | ||
3016 | /* Write section unless it is the register contents section. For that, we | |
3017 | instead store the section in the supplied pointer. This function is | |
3018 | used through bfd_map_over_sections. */ | |
3019 | ||
3020 | static void | |
3021 | mmo_write_section_unless_reg_contents (abfd, sec, p) | |
3022 | bfd *abfd; | |
3023 | asection *sec; | |
3024 | PTR p; | |
3025 | { | |
3026 | struct mmo_write_sec_info *infop = (struct mmo_write_sec_info *) p; | |
3027 | ||
3028 | if (infop->retval == false) | |
3029 | return; | |
3030 | ||
3031 | if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
3032 | { | |
3033 | infop->reg_section = sec; | |
3034 | return; | |
3035 | } | |
3036 | ||
3037 | /* Exclude the convenience register section. */ | |
3038 | if (strcmp (sec->name, MMIX_REG_SECTION_NAME) == 0) | |
3039 | { | |
3040 | if (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) | |
3041 | { | |
3042 | /* Make sure it hasn't got contents. It seems impossible to | |
3043 | make it carry contents, so we don't have a test-case for | |
3044 | this. */ | |
3045 | (*_bfd_error_handler) | |
3046 | (_("%s: internal error, internal register section %s had\ | |
3047 | contents\n"), | |
3048 | bfd_get_filename (abfd), sec->name); | |
3049 | bfd_set_error (bfd_error_bad_value); | |
3050 | infop->retval = false; | |
3051 | return; | |
3052 | } | |
3053 | ||
3054 | return; | |
3055 | } | |
3056 | ||
3057 | infop->retval = mmo_internal_write_section (abfd, sec); | |
3058 | } | |
3059 | ||
3060 | /* Do the actual output of a file. Assumes mmo_set_section_contents is | |
3061 | already called. */ | |
3062 | ||
3063 | static boolean | |
3064 | mmo_write_object_contents (abfd) | |
3065 | bfd *abfd; | |
3066 | { | |
3067 | struct mmo_write_sec_info wsecinfo; | |
3068 | ||
3069 | /* First, there are a few words of preamble. */ | |
3070 | if (! mmo_internal_write_header (abfd)) | |
3071 | return false; | |
3072 | ||
3073 | wsecinfo.reg_section = NULL; | |
3074 | wsecinfo.retval = true; | |
3075 | ||
3076 | bfd_map_over_sections (abfd, mmo_write_section_unless_reg_contents, | |
3077 | (PTR) &wsecinfo); | |
3078 | ||
3079 | if (wsecinfo.retval == false) | |
3080 | return false; | |
3081 | ||
3082 | if (wsecinfo.reg_section != NULL) | |
3083 | { | |
3084 | asection *sec = wsecinfo.reg_section; | |
3085 | unsigned int z = (unsigned int) (sec->vma / 8); | |
3086 | ||
3087 | /* Registers 0..31 must not be global. Do sanity check on the "vma" | |
3088 | of the register contents section and check that it corresponds to | |
3089 | the length of the section. */ | |
3090 | if (z < 32 || z >= 255 || (sec->vma & 7) != 0 | |
3091 | || sec->vma != 256 * 8 - sec->_raw_size - 8) | |
3092 | { | |
3093 | bfd_set_error (bfd_error_bad_value); | |
3094 | ||
3095 | if (sec->_raw_size == 0) | |
3096 | /* There must always be at least one such register. */ | |
3097 | (*_bfd_error_handler) | |
3098 | (_("%s: no initialized registers; section length 0\n"), | |
3099 | bfd_get_filename (abfd)); | |
3100 | else if (sec->vma > (256 - 32) * 8) | |
3101 | /* Provide better error message for the case of too many | |
3102 | global registers. */ | |
3103 | (*_bfd_error_handler) | |
3104 | (_("%s: too many initialized registers; section length %ld\n"), | |
3105 | bfd_get_filename (abfd), | |
3106 | (long) sec->_raw_size); | |
3107 | else | |
3108 | (*_bfd_error_handler) | |
3109 | (_("%s: invalid start address for initialized registers of\ | |
3110 | length %ld: 0x%lx%08lx\n"), | |
3111 | bfd_get_filename (abfd), | |
3112 | (long) sec->_raw_size, | |
3113 | (unsigned long) (sec->vma >> 32), (unsigned long) (sec->vma)); | |
3114 | ||
3115 | return false; | |
3116 | } | |
3117 | ||
3118 | if (! mmo_internal_write_post (abfd, z, sec)) | |
3119 | return false; | |
3120 | } | |
3121 | else | |
3122 | if (! mmo_internal_write_post (abfd, 255, NULL)) | |
3123 | return false; | |
3124 | ||
3125 | return mmo_write_symbols_and_terminator (abfd); | |
3126 | } | |
3127 | ||
3128 | /* Return the size of a NULL pointer, so we support linking in an mmo | |
3129 | object. */ | |
3130 | ||
3131 | static long | |
3132 | mmo_get_reloc_upper_bound (abfd, sec) | |
3133 | bfd *abfd ATTRIBUTE_UNUSED; | |
3134 | asection *sec ATTRIBUTE_UNUSED; | |
3135 | { | |
3136 | return sizeof (PTR); | |
3137 | } | |
3138 | ||
3139 | /* Similarly canonicalize relocs to empty, filling in the terminating NULL | |
3140 | pointer. */ | |
3141 | ||
3142 | long | |
3143 | mmo_canonicalize_reloc (abfd, section, relptr, symbols) | |
3144 | bfd *abfd ATTRIBUTE_UNUSED; | |
3145 | sec_ptr section ATTRIBUTE_UNUSED; | |
3146 | arelent **relptr; | |
3147 | asymbol **symbols ATTRIBUTE_UNUSED; | |
3148 | { | |
3149 | *relptr = NULL; | |
3150 | return 0; | |
3151 | } | |
3152 | ||
3153 | /* If there's anything in particular in a mmo bfd that we want to free, | |
3154 | make this a real function. Only do this if you see major memory | |
3155 | thrashing; zealous free:ing will cause unwanted behavior, especially if | |
3156 | you "free" memory allocated with "bfd_alloc", or even "bfd_release" a | |
3157 | block allocated with "bfd_alloc"; they're really allocated from an | |
3158 | obstack, and we don't know what was allocated there since this | |
3159 | particular allocation. */ | |
3160 | ||
3161 | #define mmo_close_and_cleanup _bfd_generic_close_and_cleanup | |
3162 | #define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info | |
3163 | ||
3164 | /* Perhaps we need to adjust this one; mmo labels (originally) without a | |
3165 | leading ':' might more appropriately be called local. */ | |
3166 | #define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name | |
3167 | ||
3168 | /* Is this one really used or defined by anyone? */ | |
3169 | #define mmo_get_lineno _bfd_nosymbols_get_lineno | |
3170 | ||
3171 | /* FIXME: We can do better on this one, if we have a dwarf2 .debug_line | |
3172 | section or if MMO line numbers are implemented. */ | |
3173 | #define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line | |
3174 | #define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol | |
3175 | #define mmo_read_minisymbols _bfd_generic_read_minisymbols | |
3176 | #define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol | |
3177 | ||
3178 | #define mmo_get_section_contents_in_window \ | |
3179 | _bfd_generic_get_section_contents_in_window | |
3180 | #define mmo_bfd_get_relocated_section_contents \ | |
3181 | bfd_generic_get_relocated_section_contents | |
3182 | #define mmo_bfd_gc_sections bfd_generic_gc_sections | |
3183 | #define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create | |
3184 | #define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols | |
3185 | #define mmo_bfd_final_link _bfd_generic_final_link | |
3186 | #define mmo_bfd_link_split_section _bfd_generic_link_split_section | |
3187 | ||
3188 | /* Strictly speaking, only MMIX uses this restricted format, but let's not | |
3189 | stop anybody from shooting themselves in the foot. */ | |
3190 | #define mmo_set_arch_mach bfd_default_set_arch_mach | |
3191 | #define mmo_bfd_relax_section bfd_generic_relax_section | |
3192 | #define mmo_bfd_merge_sections bfd_generic_merge_sections | |
3193 | ||
3194 | /* objcopy will be upset if we return -1 from bfd_get_reloc_upper_bound by | |
3195 | using BFD_JUMP_TABLE_RELOCS (_bfd_norelocs) rather than 0. FIXME: Most | |
3196 | likely a bug in the _bfd_norelocs definition. | |
3197 | ||
3198 | On the other hand, we smuggle in an mmo object (because setting up ELF | |
3199 | is too cumbersome) when linking (from other formats, presumably ELF) to | |
3200 | represent the g255 entry. We need to link that object, so need to say | |
3201 | it has no relocs. Upper bound for the size of the relocation table is | |
3202 | the size of a NULL pointer, and we support "canonicalization" for that | |
3203 | pointer. */ | |
3204 | #define mmo_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup | |
3205 | ||
3206 | /* We want to copy time of creation, otherwise we'd use | |
3207 | BFD_JUMP_TABLE_COPY (_bfd_generic). */ | |
3208 | #define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data | |
3209 | #define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data | |
3210 | #define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data | |
3211 | #define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags | |
3212 | #define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data | |
3213 | ||
3214 | CONST bfd_target bfd_mmo_vec = | |
3215 | { | |
3216 | "mmo", /* name */ | |
3217 | bfd_target_mmo_flavour, | |
3218 | BFD_ENDIAN_BIG, /* target byte order */ | |
3219 | BFD_ENDIAN_BIG, /* target headers byte order */ | |
3220 | ||
3221 | /* FIXME: Might need adjustments. */ | |
3222 | (HAS_RELOC | EXEC_P | /* object flags */ | |
3223 | HAS_LINENO | HAS_DEBUG | | |
3224 | HAS_SYMS | HAS_LOCALS | WP_TEXT), | |
3225 | ||
3226 | /* FIXME: Might need adjustments. */ | |
3227 | (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | |
3228 | | SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY), | |
3229 | /* section flags */ | |
3230 | 0, /* leading underscore */ | |
3231 | ' ', /* ar_pad_char */ | |
3232 | 16, /* ar_max_namelen */ | |
3233 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
3234 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
3235 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ | |
3236 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
3237 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
3238 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
3239 | ||
3240 | { | |
3241 | _bfd_dummy_target, | |
3242 | mmo_object_p, /* bfd_check_format */ | |
3243 | _bfd_dummy_target, | |
3244 | _bfd_dummy_target, | |
3245 | }, | |
3246 | { | |
3247 | bfd_false, | |
3248 | mmo_mkobject, | |
3249 | bfd_false, | |
3250 | bfd_false, | |
3251 | }, | |
3252 | { /* bfd_write_contents */ | |
3253 | bfd_false, | |
3254 | mmo_write_object_contents, | |
3255 | bfd_false, | |
3256 | bfd_false, | |
3257 | }, | |
3258 | ||
3259 | BFD_JUMP_TABLE_GENERIC (mmo), | |
3260 | BFD_JUMP_TABLE_COPY (mmo), | |
3261 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
3262 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
3263 | BFD_JUMP_TABLE_SYMBOLS (mmo), | |
3264 | /* We have to provide a valid method for getting relocs, returning zero, | |
3265 | so we can't say BFD_JUMP_TABLE_RELOCS (_bfd_norelocs). */ | |
3266 | BFD_JUMP_TABLE_RELOCS (mmo), | |
3267 | BFD_JUMP_TABLE_WRITE (mmo), | |
3268 | BFD_JUMP_TABLE_LINK (mmo), | |
3269 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
3270 | ||
3271 | NULL, | |
3272 | ||
3273 | NULL | |
3274 | }; |