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3c3bdf30 | 1 | /* BFD back-end for mmo objects (MMIX-specific object-format). |
a253d456 | 2 | Copyright 2001-2013 Free Software Foundation, Inc. |
3c3bdf30 NC |
3 | Written by Hans-Peter Nilsson (hp@bitrange.com). |
4 | Infrastructure and other bits originally copied from srec.c and | |
5 | binary.c. | |
6 | ||
cd123cb7 | 7 | This file is part of BFD, the Binary File Descriptor library. |
3c3bdf30 | 8 | |
cd123cb7 NC |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
3c3bdf30 | 13 | |
cd123cb7 NC |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | MA 02110-1301, USA. */ | |
3c3bdf30 | 23 | |
3c3bdf30 NC |
24 | |
25 | /* | |
26 | SECTION | |
27 | mmo backend | |
28 | ||
29 | The mmo object format is used exclusively together with Professor | |
30 | Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator | |
6eeb40b2 HPN |
31 | @command{mmix} which is available at |
32 | @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz} | |
3c3bdf30 | 33 | understands this format. That package also includes a combined |
6eeb40b2 | 34 | assembler and linker called @command{mmixal}. The mmo format has |
3c3bdf30 NC |
35 | no advantages feature-wise compared to e.g. ELF. It is a simple |
36 | non-relocatable object format with no support for archives or | |
37 | debugging information, except for symbol value information and | |
38 | line numbers (which is not yet implemented in BFD). See | |
6eeb40b2 | 39 | @url{http://www-cs-faculty.stanford.edu/~knuth/mmix.html} for more |
3c3bdf30 NC |
40 | information about MMIX. The ELF format is used for intermediate |
41 | object files in the BFD implementation. | |
42 | ||
43 | @c We want to xref the symbol table node. A feature in "chew" | |
44 | @c requires that "commands" do not contain spaces in the | |
45 | @c arguments. Hence the hyphen in "Symbol-table". | |
46 | @menu | |
47 | @* File layout:: | |
48 | @* Symbol-table:: | |
49 | @* mmo section mapping:: | |
50 | @end menu | |
51 | ||
52 | INODE | |
53 | File layout, Symbol-table, mmo, mmo | |
54 | SUBSECTION | |
55 | File layout | |
56 | ||
57 | The mmo file contents is not partitioned into named sections as | |
58 | with e.g.@: ELF. Memory areas is formed by specifying the | |
59 | location of the data that follows. Only the memory area | |
60 | @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so | |
61 | it is used for code (and constants) and the area | |
62 | @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for | |
63 | writable data. @xref{mmo section mapping}. | |
64 | ||
830866af HPN |
65 | There is provision for specifying ``special data'' of 65536 |
66 | different types. We use type 80 (decimal), arbitrarily chosen the | |
67 | same as the ELF <<e_machine>> number for MMIX, filling it with | |
68 | section information normally found in ELF objects. @xref{mmo | |
69 | section mapping}. | |
70 | ||
3c3bdf30 NC |
71 | Contents is entered as 32-bit words, xor:ed over previous |
72 | contents, always zero-initialized. A word that starts with the | |
73 | byte @samp{0x98} forms a command called a @samp{lopcode}, where | |
74 | the next byte distinguished between the thirteen lopcodes. The | |
75 | two remaining bytes, called the @samp{Y} and @samp{Z} fields, or | |
76 | the @samp{YZ} field (a 16-bit big-endian number), are used for | |
77 | various purposes different for each lopcode. As documented in | |
6eeb40b2 | 78 | @url{http://www-cs-faculty.stanford.edu/~knuth/mmixal-intro.ps.gz}, |
3c3bdf30 NC |
79 | the lopcodes are: |
80 | ||
3c3bdf30 NC |
81 | @table @code |
82 | @item lop_quote | |
83 | 0x98000001. The next word is contents, regardless of whether it | |
84 | starts with 0x98 or not. | |
85 | ||
86 | @item lop_loc | |
87 | 0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location | |
88 | directive, setting the location for the next data to the next | |
89 | 32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}), | |
90 | plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment | |
91 | and 2 for the data segment. | |
92 | ||
93 | @item lop_skip | |
94 | 0x9802YYZZ. Increase the current location by @samp{YZ} bytes. | |
95 | ||
96 | @item lop_fixo | |
97 | 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location | |
98 | as 64 bits into the location pointed to by the next 32-bit | |
99 | (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y * | |
100 | 2^56}. | |
101 | ||
102 | @item lop_fixr | |
103 | 0x9804YYZZ. @samp{YZ} is stored into the current location plus | |
104 | @math{2 - 4 * YZ}. | |
105 | ||
106 | @item lop_fixrx | |
107 | 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from | |
108 | the following 32-bit word are used in a manner similar to | |
109 | @samp{YZ} in lop_fixr: it is xor:ed into the current location | |
110 | minus @math{4 * L}. The first byte of the word is 0 or 1. If it | |
111 | is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0, | |
112 | then @math{L = (@var{lowest 24 bits of word})}. | |
113 | ||
114 | @item lop_file | |
115 | 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of | |
116 | 32-bit words. Set the file number to @samp{Y} and the line | |
117 | counter to 0. The next @math{Z * 4} bytes contain the file name, | |
118 | padded with zeros if the count is not a multiple of four. The | |
119 | same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for | |
120 | all but the first occurrence. | |
121 | ||
122 | @item lop_line | |
123 | 0x9807YYZZ. @samp{YZ} is the line number. Together with | |
124 | lop_file, it forms the source location for the next 32-bit word. | |
125 | Note that for each non-lopcode 32-bit word, line numbers are | |
126 | assumed incremented by one. | |
127 | ||
128 | @item lop_spec | |
129 | 0x9808YYZZ. @samp{YZ} is the type number. Data until the next | |
130 | lopcode other than lop_quote forms special data of type @samp{YZ}. | |
131 | @xref{mmo section mapping}. | |
132 | ||
133 | Other types than 80, (or type 80 with a content that does not | |
134 | parse) is stored in sections named <<.MMIX.spec_data.@var{n}>> | |
135 | where @var{n} is the @samp{YZ}-type. The flags for such a | |
136 | sections say not to allocate or load the data. The vma is 0. | |
137 | Contents of multiple occurrences of special data @var{n} is | |
138 | concatenated to the data of the previous lop_spec @var{n}s. The | |
139 | location in data or code at which the lop_spec occurred is lost. | |
140 | ||
141 | @item lop_pre | |
142 | 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the | |
143 | length of header information in 32-bit words, where the first word | |
144 | tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}. | |
145 | ||
146 | @item lop_post | |
147 | 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all | |
148 | content-generating lopcodes in a program. The @samp{Z} field | |
149 | denotes the value of @samp{rG} at the beginning of the program. | |
150 | The following @math{256 - Z} big-endian 64-bit words are loaded | |
151 | into global registers @samp{$G} @dots{} @samp{$255}. | |
152 | ||
153 | @item lop_stab | |
154 | 0x980b0000. The next-to-last lopcode in a program. Must follow | |
155 | immediately after the lop_post lopcode and its data. After this | |
156 | lopcode follows all symbols in a compressed format | |
157 | (@pxref{Symbol-table}). | |
158 | ||
159 | @item lop_end | |
160 | 0x980cYYZZ. The last lopcode in a program. It must follow the | |
161 | lop_stab lopcode and its data. The @samp{YZ} field contains the | |
162 | number of 32-bit words of symbol table information after the | |
163 | preceding lop_stab lopcode. | |
164 | @end table | |
165 | ||
166 | Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and | |
167 | <<lop_fixo>> are not generated by BFD, but are handled. They are | |
168 | generated by <<mmixal>>. | |
169 | ||
170 | EXAMPLE | |
171 | This trivial one-label, one-instruction file: | |
172 | ||
173 | | :Main TRAP 1,2,3 | |
174 | ||
175 | can be represented this way in mmo: | |
176 | ||
177 | | 0x98090101 - lop_pre, one 32-bit word with timestamp. | |
178 | | <timestamp> | |
179 | | 0x98010002 - lop_loc, text segment, using a 64-bit address. | |
180 | | Note that mmixal does not emit this for the file above. | |
181 | | 0x00000000 - Address, high 32 bits. | |
182 | | 0x00000000 - Address, low 32 bits. | |
183 | | 0x98060002 - lop_file, 2 32-bit words for file-name. | |
184 | | 0x74657374 - "test" | |
185 | | 0x2e730000 - ".s\0\0" | |
186 | | 0x98070001 - lop_line, line 1. | |
187 | | 0x00010203 - TRAP 1,2,3 | |
188 | | 0x980a00ff - lop_post, setting $255 to 0. | |
189 | | 0x00000000 | |
190 | | 0x00000000 | |
191 | | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. | |
192 | | 0x203a4040 @xref{Symbol-table}. | |
193 | | 0x10404020 | |
194 | | 0x4d206120 | |
195 | | 0x69016e00 | |
196 | | 0x81000000 | |
197 | | 0x980c0005 - lop_end; symbol table contained five 32-bit words. */ | |
198 | ||
3c3bdf30 | 199 | #include "sysdep.h" |
3db64b00 | 200 | #include "bfd.h" |
3c3bdf30 NC |
201 | #include "libbfd.h" |
202 | #include "libiberty.h" | |
203 | #include "elf/mmix.h" | |
204 | #include "opcode/mmix.h" | |
3c3bdf30 NC |
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; | |
278b4623 | 264 | char *name; |
3c3bdf30 NC |
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. */ | |
b34976b6 | 306 | bfd_boolean have_error; |
3c3bdf30 NC |
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 | ||
68bfbfcc AM |
339 | #define mmo_section_data(sec) \ |
340 | ((struct mmo_section_data_struct *) (sec)->used_by_bfd) | |
341 | ||
3c3bdf30 NC |
342 | /* These structures are used in bfd_map_over_sections constructs. */ |
343 | ||
344 | /* Used when writing out sections; all but the register contents section | |
345 | which is stored in reg_section. */ | |
346 | struct mmo_write_sec_info | |
347 | { | |
348 | asection *reg_section; | |
b34976b6 | 349 | bfd_boolean retval; |
3c3bdf30 NC |
350 | }; |
351 | ||
352 | /* Used when trying to find a section corresponding to addr. */ | |
353 | struct mmo_find_sec_info | |
354 | { | |
355 | asection *sec; | |
356 | bfd_vma addr; | |
357 | }; | |
358 | ||
278b4623 HPN |
359 | static bfd_boolean mmo_bfd_copy_private_bfd_data (bfd *, bfd *); |
360 | static void mmo_write_section_unless_reg_contents (bfd *, asection *, void *); | |
361 | static void mmo_find_sec_w_addr (bfd *, asection *, void *); | |
362 | static void mmo_find_sec_w_addr_grow (bfd *, asection *, void *); | |
363 | static asection *mmo_make_section (bfd *, const char *); | |
364 | static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); | |
68ffbac6 | 365 | static void mmo_print_symbol (bfd *, void *, asymbol *, |
278b4623 HPN |
366 | bfd_print_symbol_type); |
367 | static void mmo_init (void); | |
368 | static bfd_boolean mmo_mkobject (bfd *); | |
369 | static bfd_boolean mmo_scan (bfd *); | |
370 | static asection *mmo_decide_section (bfd *, bfd_vma); | |
371 | static asection *mmo_get_generic_spec_data_section (bfd *, int); | |
372 | static asection *mmo_get_spec_section (bfd *, int); | |
373 | static INLINE bfd_byte *mmo_get_loc (asection *, bfd_vma, int); | |
374 | static void mmo_xore_64 (asection *, bfd_vma vma, bfd_vma value); | |
375 | static void mmo_xore_32 (asection *, bfd_vma vma, unsigned int); | |
376 | static void mmo_xore_16 (asection *, bfd_vma vma, unsigned int); | |
377 | static const bfd_target *mmo_object_p (bfd *); | |
378 | static void mmo_map_set_sizes (bfd *, asection *, void *); | |
379 | static bfd_boolean mmo_get_symbols (bfd *); | |
380 | static bfd_boolean mmo_create_symbol (bfd *, const char *, bfd_vma, | |
381 | enum mmo_sym_type, unsigned int); | |
382 | static bfd_boolean mmo_get_section_contents (bfd *, asection *, void *, | |
383 | file_ptr, bfd_size_type); | |
384 | static long mmo_get_symtab_upper_bound (bfd *); | |
385 | static long mmo_canonicalize_symtab (bfd *, asymbol **); | |
386 | static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); | |
387 | static void mmo_print_symbol (bfd *, void *, asymbol *, | |
388 | bfd_print_symbol_type); | |
389 | static bfd_boolean mmo_set_section_contents (bfd *, sec_ptr, const void *, | |
390 | file_ptr, bfd_size_type); | |
a6b96beb | 391 | static int mmo_sizeof_headers (bfd *, struct bfd_link_info *); |
278b4623 HPN |
392 | static bfd_boolean mmo_internal_write_header (bfd *); |
393 | static bfd_boolean mmo_internal_write_post (bfd *, int, asection *); | |
394 | static bfd_boolean mmo_internal_add_3_sym (bfd *, struct mmo_symbol_trie *, | |
395 | const struct mmo_symbol *); | |
396 | static unsigned int mmo_internal_3_length (bfd *, struct mmo_symbol_trie *); | |
397 | static void mmo_internal_3_dump (bfd *, struct mmo_symbol_trie *); | |
398 | static void mmo_beb128_out (bfd *, int, int); | |
399 | static bfd_boolean mmo_internal_write_section (bfd *, asection *); | |
400 | static void mmo_write_tetra (bfd *, unsigned int); | |
401 | static void mmo_write_tetra_raw (bfd *, unsigned int); | |
402 | static void mmo_write_octa (bfd *, bfd_vma); | |
403 | static void mmo_write_octa_raw (bfd *, bfd_vma); | |
404 | static bfd_boolean mmo_write_chunk (bfd *, const bfd_byte *, unsigned int); | |
405 | static bfd_boolean mmo_flush_chunk (bfd *); | |
406 | static bfd_boolean mmo_write_loc_chunk (bfd *, bfd_vma, const bfd_byte *, | |
407 | unsigned int, bfd_vma *); | |
408 | static bfd_boolean mmo_write_chunk_list (bfd *, mmo_data_list_type *); | |
409 | static bfd_boolean mmo_write_loc_chunk_list (bfd *, mmo_data_list_type *); | |
410 | static bfd_boolean mmo_write_symbols_and_terminator (bfd *); | |
411 | static flagword mmo_sec_flags_from_bfd_flags (flagword); | |
412 | static flagword bfd_sec_flags_from_mmo_flags (flagword); | |
413 | static bfd_byte mmo_get_byte (bfd *); | |
414 | static void mmo_write_byte (bfd *, bfd_byte); | |
415 | static bfd_boolean mmo_new_section_hook (bfd *, asection *); | |
416 | static int mmo_sort_mmo_symbols (const void *, const void *); | |
417 | static bfd_boolean mmo_write_object_contents (bfd *); | |
278b4623 HPN |
418 | static bfd_boolean mmo_write_section_description (bfd *, asection *); |
419 | static bfd_boolean mmo_has_leading_or_trailing_zero_tetra_p (bfd *, | |
420 | asection *); | |
3c3bdf30 NC |
421 | |
422 | /* Global "const" variables initialized once. Must not depend on | |
423 | particular input or caller; put such things into the bfd or elsewhere. | |
424 | Look ma, no static per-invocation data! */ | |
425 | ||
f075ee0c | 426 | static |
3c3bdf30 NC |
427 | char valid_mmo_symbol_character_set[/* A-Z a-z (we assume consecutive |
428 | codes; sorry EBCDIC:ers!). */ | |
429 | + 'Z' - 'A' + 1 + 'z' - 'a' + 1 | |
430 | /* Digits. */ | |
431 | + 10 | |
432 | /* ':' and '_'. */ | |
433 | + 1 + 1 | |
434 | /* Codes higher than 126. */ | |
435 | + 256 - 126 | |
436 | /* Ending zero. */ | |
437 | + 1]; | |
438 | ||
439 | ||
440 | /* Get section SECNAME or create one if it doesn't exist. When creating | |
441 | one, new memory for the name is allocated. */ | |
442 | ||
443 | static asection * | |
278b4623 | 444 | mmo_make_section (bfd *abfd, const char *secname) |
3c3bdf30 NC |
445 | { |
446 | asection *sec = bfd_get_section_by_name (abfd, secname); | |
447 | ||
448 | if (sec == NULL) | |
449 | { | |
450 | char *newsecname = strdup (secname); | |
451 | ||
452 | if (newsecname == NULL) | |
453 | { | |
454 | (*_bfd_error_handler) | |
455 | (_("%s: No core to allocate section name %s\n"), | |
456 | bfd_get_filename (abfd), secname); | |
457 | bfd_set_error (bfd_error_system_call); | |
458 | return NULL; | |
459 | } | |
460 | sec = bfd_make_section (abfd, newsecname); | |
461 | } | |
462 | ||
463 | return sec; | |
464 | } | |
465 | ||
466 | /* Nothing to do, but keep as a placeholder if we need it. | |
467 | Note that state that might differ between bfd:s must not be initialized | |
468 | here, nor must it be static. Add it to tdata information instead. */ | |
469 | ||
470 | static void | |
278b4623 | 471 | mmo_init (void) |
3c3bdf30 | 472 | { |
b34976b6 | 473 | static bfd_boolean inited = FALSE; |
3c3bdf30 NC |
474 | int i = 0; |
475 | int j = 0; | |
476 | static const char letters[] | |
477 | = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789:_"; | |
478 | ||
82e51918 | 479 | if (inited) |
930b4cb2 | 480 | return; |
b34976b6 | 481 | inited = TRUE; |
3c3bdf30 NC |
482 | |
483 | /* Fill in the set of valid symbol characters. */ | |
484 | strcpy (valid_mmo_symbol_character_set, letters); | |
485 | i = strlen (letters); | |
486 | ||
487 | for (j = 126; j < 256; j++) | |
488 | valid_mmo_symbol_character_set[i++] = j; | |
489 | } | |
490 | ||
491 | /* Check whether an existing file is an mmo file. */ | |
492 | ||
3f9c735e | 493 | static const bfd_target * |
278b4623 | 494 | mmo_object_p (bfd *abfd) |
3c3bdf30 NC |
495 | { |
496 | struct stat statbuf; | |
497 | bfd_byte b[4]; | |
498 | ||
499 | mmo_init (); | |
500 | ||
501 | if (bfd_stat (abfd, &statbuf) < 0 | |
502 | || bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 | |
503 | || bfd_bread (b, 4, abfd) != 4) | |
504 | goto bad_final; | |
505 | ||
506 | /* All mmo files are a multiple of four bytes long. | |
507 | Only recognize version one. */ | |
508 | if ((statbuf.st_size % 4) != 0 | |
509 | || b[0] != LOP || b[1] != LOP_PRE || b[2] != 1) | |
510 | goto bad_format; | |
511 | ||
512 | /* Get the last 32-bit word. */ | |
513 | if (bfd_seek (abfd, (file_ptr) statbuf.st_size - 4, SEEK_SET) != 0 | |
514 | || bfd_bread (b, 4, abfd) != 4) | |
515 | goto bad_final; | |
516 | ||
517 | /* Check if the file ends in a lop_end lopcode. */ | |
518 | if (b[0] != LOP || b[1] != LOP_END || ! mmo_mkobject (abfd)) | |
519 | goto bad_format; | |
520 | ||
521 | /* Compute an upper bound on the max symbol length. Not really | |
522 | important as all of the symbol information can only be 256k. */ | |
523 | abfd->tdata.mmo_data->max_symbol_length = (b[2] * 256 + b[3]) * 4; | |
524 | abfd->tdata.mmo_data->lop_stab_symbol | |
525 | = bfd_malloc (abfd->tdata.mmo_data->max_symbol_length + 1); | |
526 | ||
527 | if (abfd->tdata.mmo_data->lop_stab_symbol == NULL) | |
528 | { | |
529 | (*_bfd_error_handler) | |
530 | (_("%s: No core to allocate a symbol %d bytes long\n"), | |
531 | bfd_get_filename (abfd), abfd->tdata.mmo_data->max_symbol_length); | |
532 | goto bad_final; | |
533 | } | |
534 | ||
535 | /* Read in everything. */ | |
536 | if (! mmo_scan (abfd)) | |
537 | goto bad_format_free; | |
538 | ||
539 | if (abfd->symcount > 0) | |
540 | abfd->flags |= HAS_SYMS; | |
541 | ||
542 | /* You'll have to tweak this if you want to use this format for other | |
543 | arches (not recommended due to its small-size limitations). Look at | |
544 | the ELF format for how to make it target-generic. */ | |
545 | if (! bfd_default_set_arch_mach (abfd, bfd_arch_mmix, 0)) | |
546 | goto bad_format_free; | |
547 | ||
548 | return abfd->xvec; | |
549 | ||
550 | bad_format_free: | |
551 | free (abfd->tdata.mmo_data->lop_stab_symbol); | |
552 | bad_format: | |
553 | bfd_set_error (bfd_error_wrong_format); | |
554 | bad_final: | |
555 | return NULL; | |
556 | } | |
557 | ||
558 | /* Set up the mmo tdata information. */ | |
559 | ||
b34976b6 | 560 | static bfd_boolean |
278b4623 | 561 | mmo_mkobject (bfd *abfd) |
3c3bdf30 NC |
562 | { |
563 | mmo_init (); | |
564 | ||
565 | if (abfd->tdata.mmo_data == NULL) | |
566 | { | |
567 | time_t created; | |
568 | ||
569 | /* All fields are zero-initialized, so we don't have to explicitly | |
570 | initialize most. */ | |
571 | tdata_type *tdata = (tdata_type *) bfd_zmalloc (sizeof (tdata_type)); | |
572 | if (tdata == NULL) | |
b34976b6 | 573 | return FALSE; |
3c3bdf30 NC |
574 | |
575 | created = time (NULL); | |
576 | bfd_put_32 (abfd, created, tdata->created); | |
577 | ||
578 | abfd->tdata.mmo_data = tdata; | |
579 | } | |
580 | ||
b34976b6 | 581 | return TRUE; |
3c3bdf30 NC |
582 | } |
583 | ||
b34976b6 | 584 | static bfd_boolean |
278b4623 | 585 | mmo_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
3c3bdf30 NC |
586 | { |
587 | if (bfd_get_flavour (ibfd) != bfd_target_mmo_flavour | |
588 | || bfd_get_flavour (obfd) != bfd_target_mmo_flavour) | |
b34976b6 | 589 | return TRUE; |
3c3bdf30 NC |
590 | |
591 | /* Copy the time the copied-from file was created. If people want the | |
592 | time the file was last *modified*, they have that in the normal file | |
593 | information. */ | |
594 | memcpy (obfd->tdata.mmo_data->created, ibfd->tdata.mmo_data->created, | |
595 | sizeof (obfd->tdata.mmo_data->created)); | |
b34976b6 | 596 | return TRUE; |
3c3bdf30 NC |
597 | } |
598 | ||
599 | /* Helper functions for mmo_decide_section, used through | |
600 | bfd_map_over_sections. */ | |
601 | ||
602 | static void | |
278b4623 | 603 | mmo_find_sec_w_addr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) |
3c3bdf30 NC |
604 | { |
605 | struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; | |
606 | bfd_vma vma = bfd_get_section_vma (abfd, sec); | |
607 | ||
608 | /* Ignore sections that aren't loaded. */ | |
609 | if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) | |
610 | != (SEC_LOAD | SEC_ALLOC)) | |
611 | return; | |
612 | ||
eea6121a | 613 | if (infop->addr >= vma && infop->addr < vma + sec->size) |
3c3bdf30 NC |
614 | infop->sec = sec; |
615 | } | |
616 | ||
617 | static void | |
278b4623 | 618 | mmo_find_sec_w_addr_grow (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) |
3c3bdf30 NC |
619 | { |
620 | struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; | |
621 | bfd_vma vma = bfd_get_section_vma (abfd, sec); | |
622 | ||
623 | /* Ignore sections that aren't loaded. */ | |
624 | if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) | |
625 | != (SEC_LOAD | SEC_ALLOC)) | |
626 | return; | |
627 | ||
628 | if (infop->addr >= vma && infop->addr < vma + MAX_ARTIFICIAL_SECTION_SIZE) | |
629 | infop->sec = sec; | |
630 | } | |
631 | ||
632 | /* Find a section that corresponds to a VMA. Automatically create .text | |
633 | or .data and set current section to it, depending on what vma. If we | |
634 | can't deduce a section, make one up as ".MMIX.sec.N", where N is an | |
635 | increasing number. */ | |
636 | ||
637 | static asection * | |
278b4623 | 638 | mmo_decide_section (bfd *abfd, bfd_vma vma) |
3c3bdf30 NC |
639 | { |
640 | asection *sec = NULL; | |
641 | char sec_name[sizeof (".MMIX.sec.") + 20]; | |
642 | struct mmo_find_sec_info info; | |
643 | ||
644 | info.addr = vma; | |
645 | info.sec = NULL; | |
646 | ||
647 | /* First see if there's a section that would match exactly. */ | |
648 | bfd_map_over_sections (abfd, mmo_find_sec_w_addr, &info); | |
649 | ||
650 | if (info.sec != NULL) | |
651 | return info.sec; | |
652 | ||
653 | /* If there's no such section, try and expand one of the existing ones, | |
654 | up to a limit. Make sure we have .text and .data before we try that; | |
655 | create them corresponding to expected addresses and set flags to make | |
656 | them match the "loaded and with contents" expectation. */ | |
657 | if ((vma >> 56) == 0) | |
658 | { | |
659 | sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); | |
660 | ||
661 | if (sec == NULL) | |
662 | return NULL; | |
663 | ||
a253d456 NC |
664 | if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) |
665 | return NULL; | |
666 | ||
3c3bdf30 NC |
667 | if (! bfd_set_section_flags (abfd, sec, |
668 | bfd_get_section_flags (abfd, sec) | |
669 | | SEC_CODE | SEC_LOAD | SEC_ALLOC)) | |
670 | return NULL; | |
671 | } | |
672 | else if ((vma >> 56) == 0x20) | |
673 | { | |
674 | sec = bfd_make_section_old_way (abfd, MMO_DATA_SECTION_NAME); | |
675 | ||
676 | if (sec == NULL) | |
677 | return NULL; | |
678 | ||
a253d456 NC |
679 | if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) |
680 | return NULL; | |
681 | ||
3c3bdf30 NC |
682 | if (! bfd_set_section_flags (abfd, sec, |
683 | bfd_get_section_flags (abfd, sec) | |
684 | | SEC_LOAD | SEC_ALLOC)) | |
685 | return NULL; | |
686 | } | |
687 | ||
688 | bfd_map_over_sections (abfd, mmo_find_sec_w_addr_grow, &info); | |
689 | ||
690 | if (info.sec != NULL) | |
691 | return info.sec; | |
692 | ||
693 | /* If there's still no suitable section, make a new one. */ | |
694 | sprintf (sec_name, ".MMIX.sec.%d", abfd->tdata.mmo_data->sec_no++); | |
695 | sec = mmo_make_section (abfd, sec_name); | |
a253d456 NC |
696 | |
697 | if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) | |
698 | return NULL; | |
3c3bdf30 NC |
699 | |
700 | if (! bfd_set_section_flags (abfd, sec, | |
701 | bfd_get_section_flags (abfd, sec) | |
702 | | SEC_LOAD | SEC_ALLOC)) | |
703 | return NULL; | |
704 | return sec; | |
705 | } | |
706 | ||
707 | /* Xor in a 64-bit value VALUE at VMA. */ | |
708 | ||
709 | static INLINE void | |
278b4623 | 710 | mmo_xore_64 (asection *sec, bfd_vma vma, bfd_vma value) |
3c3bdf30 NC |
711 | { |
712 | bfd_byte *loc = mmo_get_loc (sec, vma, 8); | |
713 | bfd_vma prev = bfd_get_64 (sec->owner, loc); | |
714 | ||
715 | value ^= prev; | |
716 | bfd_put_64 (sec->owner, value, loc); | |
717 | } | |
718 | ||
719 | /* Xor in a 32-bit value VALUE at VMA. */ | |
720 | ||
721 | static INLINE void | |
278b4623 | 722 | mmo_xore_32 (asection *sec, bfd_vma vma, unsigned int value) |
3c3bdf30 NC |
723 | { |
724 | bfd_byte *loc = mmo_get_loc (sec, vma, 4); | |
725 | unsigned int prev = bfd_get_32 (sec->owner, loc); | |
726 | ||
727 | value ^= prev; | |
728 | bfd_put_32 (sec->owner, value, loc); | |
729 | } | |
730 | ||
731 | /* Xor in a 16-bit value VALUE at VMA. */ | |
732 | ||
733 | static INLINE void | |
278b4623 | 734 | mmo_xore_16 (asection *sec, bfd_vma vma, unsigned int value) |
3c3bdf30 NC |
735 | { |
736 | bfd_byte *loc = mmo_get_loc (sec, vma, 2); | |
737 | unsigned int prev = bfd_get_16 (sec->owner, loc); | |
738 | ||
739 | value ^= prev; | |
740 | bfd_put_16 (sec->owner, value, loc); | |
741 | } | |
742 | ||
743 | /* Write a 32-bit word to output file, no lop_quote generated. */ | |
744 | ||
745 | static INLINE void | |
278b4623 | 746 | mmo_write_tetra_raw (bfd *abfd, unsigned int value) |
3c3bdf30 NC |
747 | { |
748 | bfd_byte buf[4]; | |
749 | ||
750 | bfd_put_32 (abfd, value, buf); | |
751 | ||
278b4623 | 752 | if (bfd_bwrite (buf, 4, abfd) != 4) |
b34976b6 | 753 | abfd->tdata.mmo_data->have_error = TRUE; |
3c3bdf30 NC |
754 | } |
755 | ||
756 | /* Write a 32-bit word to output file; lop_quote if necessary. */ | |
757 | ||
758 | static INLINE void | |
278b4623 | 759 | mmo_write_tetra (bfd *abfd, unsigned int value) |
3c3bdf30 NC |
760 | { |
761 | if (((value >> 24) & 0xff) == LOP) | |
762 | mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); | |
763 | ||
764 | mmo_write_tetra_raw (abfd, value); | |
765 | } | |
766 | ||
767 | /* Write a 64-bit word to output file, perhaps with lop_quoting. */ | |
768 | ||
769 | static INLINE void | |
278b4623 | 770 | mmo_write_octa (bfd *abfd, bfd_vma value) |
3c3bdf30 NC |
771 | { |
772 | mmo_write_tetra (abfd, (unsigned int) (value >> 32)); | |
773 | mmo_write_tetra (abfd, (unsigned int) value); | |
774 | } | |
775 | ||
776 | /* Write a 64-bit word to output file, without lop_quoting. */ | |
777 | ||
778 | static INLINE void | |
278b4623 | 779 | mmo_write_octa_raw (bfd *abfd, bfd_vma value) |
3c3bdf30 NC |
780 | { |
781 | mmo_write_tetra_raw (abfd, (unsigned int) (value >> 32)); | |
782 | mmo_write_tetra_raw (abfd, (unsigned int) value); | |
783 | } | |
784 | ||
dfa36a69 HPN |
785 | /* Write quoted contents. Intended to be called multiple times in |
786 | sequence, followed by a call to mmo_flush_chunk. */ | |
3c3bdf30 | 787 | |
b34976b6 | 788 | static INLINE bfd_boolean |
278b4623 | 789 | mmo_write_chunk (bfd *abfd, const bfd_byte *loc, unsigned int len) |
3c3bdf30 | 790 | { |
b34976b6 | 791 | bfd_boolean retval = TRUE; |
ed905580 | 792 | struct mmo_data_struct *mmop = abfd->tdata.mmo_data; |
dfa36a69 HPN |
793 | |
794 | /* Fill up a tetra from bytes remaining from a previous chunk. */ | |
ed905580 | 795 | if (mmop->byte_no != 0) |
dfa36a69 | 796 | { |
ed905580 | 797 | while (mmop->byte_no < 4 && len != 0) |
dfa36a69 | 798 | { |
ed905580 | 799 | mmop->buf[mmop->byte_no++] = *loc++; |
dfa36a69 HPN |
800 | len--; |
801 | } | |
802 | ||
ed905580 | 803 | if (mmop->byte_no == 4) |
dfa36a69 | 804 | { |
ed905580 HPN |
805 | mmo_write_tetra (abfd, bfd_get_32 (abfd, mmop->buf)); |
806 | mmop->byte_no = 0; | |
dfa36a69 HPN |
807 | } |
808 | } | |
3c3bdf30 NC |
809 | |
810 | while (len >= 4) | |
811 | { | |
812 | if (loc[0] == LOP) | |
813 | mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); | |
814 | ||
82e51918 | 815 | retval = (retval |
ed905580 | 816 | && ! mmop->have_error |
278b4623 | 817 | && 4 == bfd_bwrite (loc, 4, abfd)); |
3c3bdf30 NC |
818 | |
819 | loc += 4; | |
820 | len -= 4; | |
821 | } | |
822 | ||
823 | if (len) | |
824 | { | |
ed905580 HPN |
825 | memcpy (mmop->buf, loc, len); |
826 | mmop->byte_no = len; | |
3c3bdf30 NC |
827 | } |
828 | ||
82e51918 | 829 | if (! retval) |
ed905580 | 830 | mmop->have_error = TRUE; |
3c3bdf30 NC |
831 | return retval; |
832 | } | |
833 | ||
dfa36a69 HPN |
834 | /* Flush remaining bytes, from a previous mmo_write_chunk, zero-padded to |
835 | 4 bytes. */ | |
836 | ||
b34976b6 | 837 | static INLINE bfd_boolean |
278b4623 | 838 | mmo_flush_chunk (bfd *abfd) |
dfa36a69 HPN |
839 | { |
840 | if (abfd->tdata.mmo_data->byte_no != 0) | |
841 | { | |
842 | memset (abfd->tdata.mmo_data->buf + abfd->tdata.mmo_data->byte_no, | |
843 | 0, 4 - abfd->tdata.mmo_data->byte_no); | |
844 | mmo_write_tetra (abfd, | |
845 | bfd_get_32 (abfd, abfd->tdata.mmo_data->buf)); | |
846 | abfd->tdata.mmo_data->byte_no = 0; | |
847 | } | |
848 | ||
82e51918 | 849 | return ! abfd->tdata.mmo_data->have_error; |
dfa36a69 HPN |
850 | } |
851 | ||
3c3bdf30 NC |
852 | /* Same, but from a list. */ |
853 | ||
b34976b6 | 854 | static INLINE bfd_boolean |
278b4623 | 855 | mmo_write_chunk_list (bfd *abfd, mmo_data_list_type *datap) |
3c3bdf30 NC |
856 | { |
857 | for (; datap != NULL; datap = datap->next) | |
858 | if (! mmo_write_chunk (abfd, datap->data, datap->size)) | |
b34976b6 | 859 | return FALSE; |
3c3bdf30 | 860 | |
dfa36a69 | 861 | return mmo_flush_chunk (abfd); |
3c3bdf30 NC |
862 | } |
863 | ||
dfa36a69 HPN |
864 | /* Write a lop_loc and some contents. A caller needs to call |
865 | mmo_flush_chunk after calling this function. The location is only | |
866 | output if different than *LAST_VMAP, which is updated after this call. */ | |
3c3bdf30 | 867 | |
b34976b6 | 868 | static bfd_boolean |
278b4623 HPN |
869 | mmo_write_loc_chunk (bfd *abfd, bfd_vma vma, const bfd_byte *loc, |
870 | unsigned int len, bfd_vma *last_vmap) | |
3c3bdf30 | 871 | { |
3c3bdf30 NC |
872 | /* Find an initial and trailing section of zero tetras; we don't need to |
873 | write out zeros. FIXME: When we do this, we should emit section size | |
dfa36a69 | 874 | and address specifiers, else objcopy can't always perform an identity |
8d28f606 HPN |
875 | translation. Only do this if we *don't* have left-over data from a |
876 | previous write or the vma of this chunk is *not* the next address, | |
877 | because then data isn't tetrabyte-aligned and we're concatenating to | |
878 | that left-over data. */ | |
879 | ||
880 | if (abfd->tdata.mmo_data->byte_no == 0 || vma != *last_vmap) | |
3c3bdf30 | 881 | { |
8d28f606 HPN |
882 | while (len >= 4 && bfd_get_32 (abfd, loc) == 0) |
883 | { | |
884 | vma += 4; | |
885 | len -= 4; | |
886 | loc += 4; | |
887 | } | |
3c3bdf30 | 888 | |
8d28f606 HPN |
889 | while (len >= 4 && bfd_get_32 (abfd, loc + len - 4) == 0) |
890 | len -= 4; | |
891 | } | |
3c3bdf30 | 892 | |
dfa36a69 HPN |
893 | /* Only write out the location if it's different than the one the caller |
894 | (supposedly) previously handled, accounting for omitted leading zeros. */ | |
895 | if (vma != *last_vmap) | |
896 | { | |
897 | /* We might be in the middle of a sequence. */ | |
898 | mmo_flush_chunk (abfd); | |
899 | ||
900 | /* We always write the location as 64 bits; no use saving bytes | |
901 | here. */ | |
902 | mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_LOC << 16) | 2); | |
903 | mmo_write_octa_raw (abfd, vma); | |
904 | } | |
905 | ||
906 | /* Update to reflect end of this chunk, with trailing zeros omitted. */ | |
907 | *last_vmap = vma + len; | |
908 | ||
82e51918 AM |
909 | return (! abfd->tdata.mmo_data->have_error |
910 | && mmo_write_chunk (abfd, loc, len)); | |
3c3bdf30 NC |
911 | } |
912 | ||
913 | /* Same, but from a list. */ | |
914 | ||
b34976b6 | 915 | static INLINE bfd_boolean |
278b4623 | 916 | mmo_write_loc_chunk_list (bfd *abfd, mmo_data_list_type *datap) |
3c3bdf30 | 917 | { |
dfa36a69 HPN |
918 | /* Get an address different than the address of the first chunk. */ |
919 | bfd_vma last_vma = datap ? datap->where - 1 : 0; | |
920 | ||
3c3bdf30 | 921 | for (; datap != NULL; datap = datap->next) |
dfa36a69 HPN |
922 | if (! mmo_write_loc_chunk (abfd, datap->where, datap->data, datap->size, |
923 | &last_vma)) | |
b34976b6 | 924 | return FALSE; |
3c3bdf30 | 925 | |
dfa36a69 | 926 | return mmo_flush_chunk (abfd); |
3c3bdf30 NC |
927 | } |
928 | ||
929 | /* Make a .MMIX.spec_data.N section. */ | |
930 | ||
931 | static asection * | |
278b4623 | 932 | mmo_get_generic_spec_data_section (bfd *abfd, int spec_data_number) |
3c3bdf30 NC |
933 | { |
934 | asection *sec; | |
935 | char secname[sizeof (MMIX_OTHER_SPEC_SECTION_PREFIX) + 20] | |
936 | = MMIX_OTHER_SPEC_SECTION_PREFIX; | |
937 | ||
938 | sprintf (secname + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX), | |
939 | "%d", spec_data_number); | |
940 | ||
941 | sec = mmo_make_section (abfd, secname); | |
942 | ||
943 | return sec; | |
944 | } | |
945 | ||
946 | /* Make a special section for SPEC_DATA_NUMBER. If it is the one we use | |
947 | ourselves, parse some of its data to get at the section name. */ | |
948 | ||
949 | static asection * | |
278b4623 | 950 | mmo_get_spec_section (bfd *abfd, int spec_data_number) |
3c3bdf30 | 951 | { |
f075ee0c | 952 | char *secname; |
3c3bdf30 NC |
953 | asection *sec; |
954 | bfd_byte buf[4]; | |
955 | unsigned int secname_length; | |
956 | unsigned int i; | |
957 | bfd_vma section_length; | |
958 | bfd_vma section_vma; | |
959 | mmo_data_list_type *loc; | |
960 | flagword flags; | |
961 | long orig_pos; | |
962 | ||
963 | /* If this isn't the "special" special data, then make a placeholder | |
964 | section. */ | |
965 | if (spec_data_number != SPEC_DATA_SECTION) | |
966 | return mmo_get_generic_spec_data_section (abfd, spec_data_number); | |
967 | ||
968 | /* Seek back to this position if there was a format error. */ | |
969 | orig_pos = bfd_tell (abfd); | |
970 | ||
971 | /* Read the length (in 32-bit words). */ | |
972 | if (bfd_bread (buf, 4, abfd) != 4) | |
973 | goto format_error; | |
974 | ||
975 | if (buf[0] == LOP) | |
976 | { | |
977 | if (buf[1] != LOP_QUOTE) | |
978 | goto format_error; | |
979 | ||
980 | if (bfd_bread (buf, 4, abfd) != 4) | |
981 | goto format_error; | |
982 | } | |
983 | ||
984 | /* We don't care to keep the name length accurate. It's | |
985 | zero-terminated. */ | |
986 | secname_length = bfd_get_32 (abfd, buf) * 4; | |
987 | ||
988 | /* Check section name length for sanity. */ | |
989 | if (secname_length > MAX_SECTION_NAME_SIZE) | |
990 | goto format_error; | |
991 | ||
992 | /* This should be free'd regardless if a section is created. */ | |
993 | secname = bfd_malloc (secname_length + 1); | |
994 | secname[secname_length] = 0; | |
995 | ||
996 | for (i = 0; i < secname_length / 4; i++) | |
997 | { | |
998 | if (bfd_bread (secname + i * 4, 4, abfd) != 4) | |
999 | goto format_error_free; | |
1000 | ||
f075ee0c | 1001 | if (secname[i * 4] == (char) LOP) |
3c3bdf30 NC |
1002 | { |
1003 | /* A bit of overkill, but we handle char 0x98 in a section name, | |
1004 | and recognize misparsing. */ | |
1005 | if (secname[i * 4 + 1] != LOP_QUOTE | |
1006 | || bfd_bread (secname + i * 4, 4, abfd) != 4) | |
1007 | /* Whoops. We thought this was a name, and now we found a | |
1008 | non-lop_quote lopcode before we parsed the whole length of | |
1009 | the name. Signal end-of-file in the same manner. */ | |
1010 | goto format_error_free; | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | /* Get the section flags. */ | |
1015 | if (bfd_bread (buf, 4, abfd) != 4 | |
1016 | || (buf[0] == LOP | |
1017 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1018 | goto format_error_free; | |
1019 | ||
1020 | flags = bfd_get_32 (abfd, buf); | |
1021 | ||
1022 | /* Get the section length. */ | |
1023 | if (bfd_bread (buf, 4, abfd) != 4 | |
1024 | || (buf[0] == LOP | |
1025 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1026 | goto format_error_free; | |
1027 | ||
1028 | section_length = (bfd_vma) bfd_get_32 (abfd, buf) << 32; | |
1029 | ||
1030 | /* That's the first, high-part. Now get the low part. */ | |
1031 | ||
1032 | if (bfd_bread (buf, 4, abfd) != 4 | |
1033 | || (buf[0] == LOP | |
1034 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1035 | goto format_error_free; | |
1036 | ||
1037 | section_length |= (bfd_vma) bfd_get_32 (abfd, buf); | |
1038 | ||
1039 | /* Check the section length for sanity. */ | |
1040 | if (section_length > MAX_ARTIFICIAL_SECTION_SIZE) | |
1041 | goto format_error_free; | |
1042 | ||
1043 | /* Get the section VMA. */ | |
1044 | if (bfd_bread (buf, 4, abfd) != 4 | |
1045 | || (buf[0] == LOP | |
1046 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1047 | goto format_error_free; | |
1048 | ||
1049 | section_vma = (bfd_vma) bfd_get_32 (abfd, buf) << 32; | |
1050 | ||
1051 | /* That's the first, high-part. Now get the low part. */ | |
1052 | if (bfd_bread (buf, 4, abfd) != 4 | |
1053 | || (buf[0] == LOP | |
1054 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1055 | goto format_error_free; | |
1056 | ||
1057 | section_vma |= (bfd_vma) bfd_get_32 (abfd, buf); | |
1058 | ||
1059 | sec = mmo_make_section (abfd, secname); | |
1060 | free (secname); | |
1061 | if (sec == NULL) | |
1062 | goto format_error; | |
1063 | ||
1064 | /* We allocate a buffer here for the advertised size, with head room for | |
1065 | tetrabyte alignment. */ | |
1066 | loc = bfd_zmalloc (section_length + 3 | |
1067 | + sizeof (struct mmo_data_list_struct)); | |
1068 | if (loc == NULL) | |
1069 | goto format_error; | |
1070 | ||
1071 | /* Use a TETRA-rounded size for the allocated buffer; we set the | |
1072 | "visible" section size below. */ | |
1073 | loc->size = (section_length + 3) & ~3; | |
1074 | ||
1075 | /* Add in the section flags we found to those bfd entered during this | |
1076 | process and set the contents. */ | |
1077 | if (! bfd_set_section_flags (abfd, sec, | |
1078 | bfd_sec_flags_from_mmo_flags (flags) | |
1079 | | bfd_get_section_flags (abfd, sec) | |
1080 | | (section_length != 0 ? SEC_HAS_CONTENTS : 0)) | |
eea6121a | 1081 | || ! bfd_set_section_size (abfd, sec, sec->size + section_length) |
3c3bdf30 NC |
1082 | /* Set VMA only for the first occurrence. */ |
1083 | || (! sec->user_set_vma | |
1084 | && ! bfd_set_section_vma (abfd, sec, section_vma))) | |
1085 | { | |
1086 | /* If we get an error for any of the calls above, signal more than | |
1087 | just a format error for the spec section. */ | |
1088 | return NULL; | |
1089 | } | |
1090 | ||
1091 | loc->next = NULL; | |
68bfbfcc AM |
1092 | if (mmo_section_data (sec)->tail != NULL) |
1093 | mmo_section_data (sec)->tail->next = loc; | |
3c3bdf30 | 1094 | else |
68bfbfcc AM |
1095 | mmo_section_data (sec)->head = loc; |
1096 | mmo_section_data (sec)->tail = loc; | |
3c3bdf30 NC |
1097 | loc->where = section_vma; |
1098 | ||
1099 | return sec; | |
1100 | ||
1101 | format_error_free: | |
1102 | free (secname); | |
1103 | format_error: | |
1104 | if (bfd_seek (abfd, orig_pos, SEEK_SET) != 0) | |
1105 | return NULL; | |
1106 | ||
1107 | return mmo_get_generic_spec_data_section (abfd, spec_data_number); | |
1108 | } | |
1109 | ||
1110 | /* Read a byte, but read from file in multiples of 32-bit words. */ | |
1111 | ||
1112 | static bfd_byte | |
278b4623 | 1113 | mmo_get_byte (bfd *abfd) |
3c3bdf30 NC |
1114 | { |
1115 | bfd_byte retval; | |
1116 | ||
1117 | if (abfd->tdata.mmo_data->byte_no == 0) | |
1118 | { | |
82e51918 | 1119 | if (! abfd->tdata.mmo_data->have_error |
3c3bdf30 NC |
1120 | && bfd_bread (abfd->tdata.mmo_data->buf, 4, abfd) != 4) |
1121 | { | |
b34976b6 | 1122 | abfd->tdata.mmo_data->have_error = TRUE; |
3c3bdf30 NC |
1123 | |
1124 | /* A value somewhat safe against tripping on some inconsistency | |
1125 | when mopping up after this error. */ | |
1126 | return 128; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | retval = abfd->tdata.mmo_data->buf[abfd->tdata.mmo_data->byte_no]; | |
1131 | abfd->tdata.mmo_data->byte_no = (abfd->tdata.mmo_data->byte_no + 1) % 4; | |
1132 | ||
1133 | return retval; | |
1134 | } | |
1135 | ||
1136 | /* Write a byte, in multiples of 32-bit words. */ | |
1137 | ||
1138 | static void | |
278b4623 | 1139 | mmo_write_byte (bfd *abfd, bfd_byte value) |
3c3bdf30 NC |
1140 | { |
1141 | abfd->tdata.mmo_data->buf[(abfd->tdata.mmo_data->byte_no++ % 4)] = value; | |
1142 | if ((abfd->tdata.mmo_data->byte_no % 4) == 0) | |
1143 | { | |
82e51918 | 1144 | if (! abfd->tdata.mmo_data->have_error |
3c3bdf30 | 1145 | && bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) |
b34976b6 | 1146 | abfd->tdata.mmo_data->have_error = TRUE; |
3c3bdf30 NC |
1147 | } |
1148 | } | |
1149 | ||
1150 | /* Create a symbol. */ | |
1151 | ||
b34976b6 | 1152 | static bfd_boolean |
278b4623 HPN |
1153 | mmo_create_symbol (bfd *abfd, const char *symname, bfd_vma addr, enum |
1154 | mmo_sym_type sym_type, unsigned int serno) | |
3c3bdf30 NC |
1155 | { |
1156 | struct mmo_symbol *n; | |
1157 | ||
1158 | n = (struct mmo_symbol *) bfd_alloc (abfd, sizeof (struct mmo_symbol)); | |
1159 | if (n == NULL) | |
b34976b6 | 1160 | return FALSE; |
3c3bdf30 NC |
1161 | |
1162 | n->name = bfd_alloc (abfd, strlen (symname) + 1); | |
1163 | if (n->name == NULL) | |
b34976b6 | 1164 | return FALSE; |
3c3bdf30 | 1165 | |
278b4623 | 1166 | strcpy (n->name, symname); |
3c3bdf30 NC |
1167 | |
1168 | n->value = addr; | |
1169 | n->sym_type = sym_type; | |
1170 | n->serno = serno; | |
1171 | ||
1172 | if (abfd->tdata.mmo_data->symbols == NULL) | |
1173 | abfd->tdata.mmo_data->symbols = n; | |
1174 | else | |
1175 | abfd->tdata.mmo_data->symtail->next = n; | |
1176 | abfd->tdata.mmo_data->symtail = n; | |
1177 | n->next = NULL; | |
1178 | ||
1179 | ++abfd->symcount; | |
1180 | ||
1181 | /* Check that :Main equals the last octa of the .MMIX.reg_contents | |
1182 | section, as it's the one place we're sure to pass when reading a mmo | |
1183 | object. For written objects, we do it while setting the symbol | |
1184 | table. */ | |
1185 | if (strcmp (symname, MMIX_START_SYMBOL_NAME) == 0 | |
1186 | && bfd_get_start_address (abfd) != addr) | |
1187 | { | |
1188 | (*_bfd_error_handler) | |
1189 | (_("%s: invalid mmo file: initialization value for $255 is not `Main'\n"), | |
1190 | bfd_get_filename (abfd)); | |
1191 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1192 | return FALSE; |
3c3bdf30 NC |
1193 | } |
1194 | ||
b34976b6 | 1195 | return TRUE; |
3c3bdf30 NC |
1196 | } |
1197 | ||
1198 | /* Read in symbols. */ | |
1199 | ||
b34976b6 | 1200 | static bfd_boolean |
278b4623 | 1201 | mmo_get_symbols (bfd *abfd) |
3c3bdf30 NC |
1202 | { |
1203 | /* | |
1204 | INODE | |
1205 | Symbol-table, mmo section mapping, File layout, mmo | |
1206 | SUBSECTION | |
1207 | Symbol table format | |
1208 | ||
1209 | From mmixal.w (or really, the generated mmixal.tex) in | |
6eeb40b2 | 1210 | @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz}): |
3c3bdf30 NC |
1211 | ``Symbols are stored and retrieved by means of a @samp{ternary |
1212 | search trie}, following ideas of Bentley and Sedgewick. (See | |
1213 | ACM--SIAM Symp.@: on Discrete Algorithms @samp{8} (1997), 360--369; | |
1214 | R.@:Sedgewick, @samp{Algorithms in C} (Reading, Mass.@: | |
1215 | Addison--Wesley, 1998), @samp{15.4}.) Each trie node stores a | |
1216 | character, and there are branches to subtries for the cases where | |
1217 | a given character is less than, equal to, or greater than the | |
1218 | character in the trie. There also is a pointer to a symbol table | |
1219 | entry if a symbol ends at the current node.'' | |
1220 | ||
1221 | So it's a tree encoded as a stream of bytes. The stream of bytes | |
1222 | acts on a single virtual global symbol, adding and removing | |
1223 | characters and signalling complete symbol points. Here, we read | |
1224 | the stream and create symbols at the completion points. | |
1225 | ||
1226 | First, there's a control byte <<m>>. If any of the listed bits | |
1227 | in <<m>> is nonzero, we execute what stands at the right, in | |
1228 | the listed order: | |
1229 | ||
1230 | | (MMO3_LEFT) | |
1231 | | 0x40 - Traverse left trie. | |
1232 | | (Read a new command byte and recurse.) | |
1233 | | | |
1234 | | (MMO3_SYMBITS) | |
1235 | | 0x2f - Read the next byte as a character and store it in the | |
1236 | | current character position; increment character position. | |
1237 | | Test the bits of <<m>>: | |
1238 | | | |
1239 | | (MMO3_WCHAR) | |
1240 | | 0x80 - The character is 16-bit (so read another byte, | |
1241 | | merge into current character. | |
1242 | | | |
1243 | | (MMO3_TYPEBITS) | |
1244 | | 0xf - We have a complete symbol; parse the type, value | |
1245 | | and serial number and do what should be done | |
1246 | | with a symbol. The type and length information | |
1247 | | is in j = (m & 0xf). | |
1248 | | | |
1249 | | (MMO3_REGQUAL_BITS) | |
1250 | | j == 0xf: A register variable. The following | |
1251 | | byte tells which register. | |
1252 | | j <= 8: An absolute symbol. Read j bytes as the | |
1253 | | big-endian number the symbol equals. | |
1254 | | A j = 2 with two zero bytes denotes an | |
1255 | | unknown symbol. | |
1256 | | j > 8: As with j <= 8, but add (0x20 << 56) | |
1257 | | to the value in the following j - 8 | |
1258 | | bytes. | |
1259 | | | |
1260 | | Then comes the serial number, as a variant of | |
1261 | | uleb128, but better named ubeb128: | |
1262 | | Read bytes and shift the previous value left 7 | |
1263 | | (multiply by 128). Add in the new byte, repeat | |
1264 | | until a byte has bit 7 set. The serial number | |
1265 | | is the computed value minus 128. | |
1266 | | | |
1267 | | (MMO3_MIDDLE) | |
1268 | | 0x20 - Traverse middle trie. (Read a new command byte | |
1269 | | and recurse.) Decrement character position. | |
1270 | | | |
1271 | | (MMO3_RIGHT) | |
1272 | | 0x10 - Traverse right trie. (Read a new command byte and | |
1273 | | recurse.) | |
1274 | ||
1275 | Let's look again at the <<lop_stab>> for the trivial file | |
1276 | (@pxref{File layout}). | |
1277 | ||
1278 | | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. | |
1279 | | 0x203a4040 | |
1280 | | 0x10404020 | |
1281 | | 0x4d206120 | |
1282 | | 0x69016e00 | |
1283 | | 0x81000000 | |
1284 | ||
1285 | This forms the trivial trie (note that the path between ``:'' and | |
1286 | ``M'' is redundant): | |
1287 | ||
1288 | | 203a ":" | |
1289 | | 40 / | |
1290 | | 40 / | |
1291 | | 10 \ | |
1292 | | 40 / | |
1293 | | 40 / | |
1294 | | 204d "M" | |
1295 | | 2061 "a" | |
1296 | | 2069 "i" | |
1297 | | 016e "n" is the last character in a full symbol, and | |
1298 | | with a value represented in one byte. | |
1299 | | 00 The value is 0. | |
1300 | | 81 The serial number is 1. */ | |
1301 | ||
1302 | bfd_byte m = mmo_get_byte (abfd); | |
1303 | ||
1304 | /* Check first if we have a bad hair day. */ | |
82e51918 | 1305 | if (abfd->tdata.mmo_data->have_error) |
b34976b6 | 1306 | return FALSE; |
3c3bdf30 NC |
1307 | |
1308 | if (m & MMO3_LEFT) | |
1309 | /* Traverse left trie. */ | |
1310 | mmo_get_symbols (abfd); | |
1311 | ||
1312 | if (m & MMO3_SYMBITS) | |
1313 | { | |
1314 | bfd_byte c = mmo_get_byte (abfd); | |
1315 | bfd_byte j = m & MMO3_TYPEBITS; | |
1316 | bfd_vma addr = 0; | |
1317 | enum mmo_sym_type sym_type; | |
1318 | unsigned int serno = 0; | |
1319 | bfd_byte k; | |
1320 | ||
1321 | if (m & MMO3_WCHAR) | |
1322 | { | |
1323 | bfd_byte c2 = mmo_get_byte (abfd); | |
1324 | ||
1325 | /* A two-byte character. We can't grok this, but neither can | |
1326 | mmotype, for other cases than the second byte being zero. */ | |
1327 | ||
1328 | if (c != 0) | |
1329 | { | |
1330 | abfd->tdata.mmo_data->lop_stab_symbol | |
1331 | [abfd->tdata.mmo_data->symbol_position] = 0; | |
1332 | ||
1333 | (*_bfd_error_handler) | |
278b4623 HPN |
1334 | (_("%s: unsupported wide character sequence" |
1335 | " 0x%02X 0x%02X after symbol name starting with `%s'\n"), | |
3c3bdf30 NC |
1336 | bfd_get_filename (abfd), c, c2, |
1337 | abfd->tdata.mmo_data->lop_stab_symbol); | |
1338 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 AM |
1339 | abfd->tdata.mmo_data->have_error = TRUE; |
1340 | return FALSE; | |
3c3bdf30 NC |
1341 | } |
1342 | else | |
1343 | c = c2; | |
1344 | } | |
1345 | ||
1346 | abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position++] = c; | |
1347 | abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position] = 0; | |
1348 | ||
1349 | if (j & MMO3_REGQUAL_BITS) | |
1350 | { | |
1351 | if (j == MMO3_REGQUAL_BITS) | |
1352 | { | |
1353 | sym_type = mmo_reg_sym; | |
1354 | addr = mmo_get_byte (abfd); | |
1355 | } | |
1356 | else if (j <= 8) | |
1357 | { | |
1358 | unsigned int i; | |
1359 | ||
1360 | for (i = 0; i < j; i++) | |
1361 | addr = (addr << 8) + mmo_get_byte (abfd); | |
1362 | ||
1363 | if (addr == 0 && j == MMO3_UNDEF) | |
1364 | sym_type = mmo_undef_sym; | |
1365 | else | |
1366 | sym_type = mmo_abs_sym; | |
1367 | } | |
1368 | else | |
1369 | { | |
1370 | unsigned int i; | |
1371 | ||
1372 | for (i = MMO3_DATA; i < j; i++) | |
1373 | addr = (addr << 8) + mmo_get_byte (abfd); | |
1374 | ||
1375 | addr += (bfd_vma) 0x20 << 56; | |
1376 | sym_type = mmo_data_sym; | |
1377 | } | |
1378 | ||
1379 | /* Get the serial number. */ | |
1380 | do | |
1381 | { | |
1382 | k = mmo_get_byte (abfd); | |
1383 | serno = (serno << 7) + k; | |
1384 | } | |
1385 | while (k < 128); | |
1386 | serno -= 128; | |
1387 | ||
1388 | /* Got it. Now enter it. Skip a leading ":". */ | |
82e51918 | 1389 | if (! abfd->tdata.mmo_data->have_error |
3c3bdf30 NC |
1390 | && ! mmo_create_symbol (abfd, |
1391 | abfd->tdata.mmo_data->lop_stab_symbol | |
1392 | + 1, | |
1393 | addr, sym_type, serno)) | |
b34976b6 | 1394 | abfd->tdata.mmo_data->have_error = TRUE; |
3c3bdf30 NC |
1395 | } |
1396 | ||
1397 | if (m & MMO3_MIDDLE) | |
1398 | /* Traverse middle trie. */ | |
1399 | mmo_get_symbols (abfd); | |
1400 | ||
1401 | abfd->tdata.mmo_data->symbol_position--; | |
1402 | } | |
1403 | ||
1404 | if (m & MMO3_RIGHT) | |
1405 | /* Traverse right trie. */ | |
1406 | mmo_get_symbols (abfd); | |
1407 | ||
82e51918 | 1408 | return ! abfd->tdata.mmo_data->have_error; |
3c3bdf30 NC |
1409 | } |
1410 | ||
1411 | /* Get the location of memory area [VMA..VMA + SIZE - 1], which we think | |
1412 | is in section SEC. Adjust and reallocate zero-initialized contents. | |
1413 | If there's new contents, allocate to the next multiple of | |
1414 | MMO_SEC_CONTENTS_CHUNK_SIZE. */ | |
1415 | ||
1416 | static INLINE bfd_byte * | |
278b4623 | 1417 | mmo_get_loc (asection *sec, bfd_vma vma, int size) |
3c3bdf30 NC |
1418 | { |
1419 | bfd_size_type allocated_size; | |
68bfbfcc | 1420 | struct mmo_section_data_struct *sdatap = mmo_section_data (sec); |
3c3bdf30 NC |
1421 | struct mmo_data_list_struct *datap = sdatap->head; |
1422 | struct mmo_data_list_struct *entry; | |
1423 | ||
dfa36a69 HPN |
1424 | /* First search the list to see if we have the requested chunk in one |
1425 | piece, or perhaps if we have a suitable chunk with room to fit. */ | |
3c3bdf30 NC |
1426 | for (; datap != NULL; datap = datap->next) |
1427 | { | |
1428 | if (datap->where <= vma | |
1429 | && datap->where + datap->size >= vma + size) | |
1430 | return datap->data + vma - datap->where; | |
1431 | else if (datap->where <= vma | |
1432 | && datap->where + datap->allocated_size >= vma + size | |
1433 | /* Only munch on the "allocated size" if it does not | |
1434 | overlap the next chunk. */ | |
1435 | && (datap->next == NULL || datap->next->where >= vma + size)) | |
1436 | { | |
1437 | /* There was room allocated, but the size wasn't set to include | |
1438 | it. Do that now. */ | |
1439 | datap->size += (vma + size) - (datap->where + datap->size); | |
1440 | ||
dfa36a69 HPN |
1441 | /* Update the section size. This happens only if we update the |
1442 | 32-bit-aligned chunk size. Callers that have | |
1443 | non-32-bit-aligned sections should do all allocation and | |
1444 | size-setting by themselves or at least set the section size | |
1445 | after the last allocating call to this function. */ | |
eea6121a AM |
1446 | if (vma + size > sec->vma + sec->size) |
1447 | sec->size += (vma + size) - (sec->vma + sec->size); | |
3c3bdf30 NC |
1448 | |
1449 | return datap->data + vma - datap->where; | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | /* Not found; allocate a new block. First check in case we get a | |
1454 | request for a size split up over several blocks; we'll have to return | |
1455 | NULL for those cases, requesting the caller to split up the request. | |
1456 | Requests with an address aligned on MMO_SEC_CONTENTS_CHUNK_SIZE bytes and | |
1457 | for no more than MMO_SEC_CONTENTS_CHUNK_SIZE will always get resolved. */ | |
1458 | ||
1459 | for (datap = sdatap->head; datap != NULL; datap = datap->next) | |
1460 | if ((datap->where <= vma && datap->where + datap->size > vma) | |
1461 | || (datap->where < vma + size | |
1462 | && datap->where + datap->size >= vma + size)) | |
1463 | return NULL; | |
1464 | ||
1465 | allocated_size | |
1466 | = (size + MMO_SEC_CONTENTS_CHUNK_SIZE - 1) & ~(MMO_SEC_CONTENTS_CHUNK_SIZE - 1); | |
1467 | entry = (mmo_data_list_type *) | |
1468 | bfd_zalloc (sec->owner, sizeof (mmo_data_list_type) + allocated_size); | |
1469 | if (entry == NULL) | |
c295a511 | 1470 | return NULL; |
3c3bdf30 NC |
1471 | entry->where = vma; |
1472 | entry->size = size; | |
1473 | entry->allocated_size = allocated_size; | |
1474 | ||
1475 | datap = sdatap->head; | |
1476 | ||
1477 | /* Sort the records by address. Optimize for the common case of adding | |
1478 | a record to the end of the list. */ | |
1479 | if (sdatap->tail != NULL && entry->where >= sdatap->tail->where) | |
1480 | { | |
1481 | sdatap->tail->next = entry; | |
1482 | entry->next = NULL; | |
1483 | sdatap->tail = entry; | |
1484 | } | |
1485 | else | |
1486 | { | |
1487 | mmo_data_list_type **look; | |
1488 | for (look = &sdatap->head; | |
1489 | *look != NULL && (*look)->where < entry->where; | |
1490 | look = &(*look)->next) | |
1491 | ; | |
1492 | entry->next = *look; | |
1493 | *look = entry; | |
1494 | if (entry->next == NULL) | |
1495 | { | |
1496 | sdatap->tail = entry; | |
1497 | ||
1498 | /* We get here for the first time (at other times too) for this | |
1499 | section. Say we have contents. */ | |
1500 | if (! bfd_set_section_flags (sec->owner, sec, | |
1501 | bfd_get_section_flags (sec->owner, sec) | |
1502 | | SEC_HAS_CONTENTS)) | |
1503 | return NULL; | |
1504 | } | |
1505 | } | |
1506 | ||
dfa36a69 HPN |
1507 | /* Update the section size. This happens only when we add contents and |
1508 | re-size as we go. The section size will then be aligned to 32 bits. */ | |
eea6121a AM |
1509 | if (vma + size > sec->vma + sec->size) |
1510 | sec->size += (vma + size) - (sec->vma + sec->size); | |
3c3bdf30 NC |
1511 | return entry->data; |
1512 | } | |
1513 | ||
1514 | /* Set sizes once we've read in all sections. */ | |
1515 | ||
1516 | static void | |
278b4623 HPN |
1517 | mmo_map_set_sizes (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, |
1518 | void *ignored ATTRIBUTE_UNUSED) | |
3c3bdf30 | 1519 | { |
3c3bdf30 NC |
1520 | sec->lma = sec->vma; |
1521 | } | |
1522 | ||
1523 | /* Read the mmo file and turn it into sections. */ | |
1524 | ||
b34976b6 | 1525 | static bfd_boolean |
278b4623 | 1526 | mmo_scan (bfd *abfd) |
3c3bdf30 NC |
1527 | { |
1528 | unsigned int i; | |
1529 | unsigned int lineno = 1; | |
b34976b6 | 1530 | bfd_boolean error = FALSE; |
3c3bdf30 NC |
1531 | bfd_vma vma = 0; |
1532 | asection *sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); | |
1533 | asection *non_spec_sec = NULL; | |
1534 | bfd_vma non_spec_vma = 0; | |
3c3bdf30 NC |
1535 | bfd_size_type nbytes_read = 0; |
1536 | /* Buffer with room to read a 64-bit value. */ | |
1537 | bfd_byte buf[8]; | |
1538 | long stab_loc = -1; | |
1539 | char *file_names[256]; | |
1540 | ||
c9ba0c87 | 1541 | abfd->symcount = 0; |
3c3bdf30 NC |
1542 | memset (file_names, 0, sizeof (file_names)); |
1543 | ||
1544 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) | |
1545 | goto error_return; | |
1546 | ||
1547 | while ((nbytes_read = bfd_bread (buf, 4, abfd)) == 4) | |
1548 | { | |
1549 | if (buf[0] == LOP) | |
1550 | { | |
1551 | unsigned int y = bfd_get_8 (abfd, buf + 2); | |
1552 | unsigned int z = bfd_get_8 (abfd, buf + 3); | |
1553 | ||
1554 | /* Change back to the original section for lopcodes other | |
1555 | than LOP_QUOTE that comes after a LOP_SPEC. */ | |
1556 | if ((buf[1] != LOP_QUOTE || y != 0 || z != 1) | |
1557 | && non_spec_sec != NULL) | |
1558 | { | |
1559 | sec = non_spec_sec; | |
1560 | vma = non_spec_vma; | |
1561 | non_spec_sec = NULL; | |
1562 | } | |
1563 | ||
1564 | switch (buf[1]) | |
1565 | { | |
1566 | default: | |
1567 | (*_bfd_error_handler) | |
1568 | (_("%s: invalid mmo file: unsupported lopcode `%d'\n"), | |
1569 | bfd_get_filename (abfd), buf[1]); | |
1570 | bfd_set_error (bfd_error_bad_value); | |
1571 | goto error_return; | |
1572 | ||
1573 | case LOP_QUOTE: | |
1574 | /* Quote the next 32-bit word. */ | |
1575 | if (y != 0 || z != 1) | |
1576 | { | |
1577 | (*_bfd_error_handler) | |
1578 | (_("%s: invalid mmo file: expected YZ = 1 got YZ = %d for lop_quote\n"), | |
1579 | bfd_get_filename (abfd), y*256+z); | |
1580 | bfd_set_error (bfd_error_bad_value); | |
1581 | goto error_return; | |
1582 | } | |
1583 | if (bfd_bread (buf, 4, abfd) != 4) | |
1584 | goto error_return; | |
1585 | ||
1586 | mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf)); | |
1587 | vma += 4; | |
1588 | vma &= ~3; | |
1589 | lineno++; | |
1590 | break; | |
1591 | ||
1592 | case LOP_LOC: | |
1593 | /* Set vma (and section). */ | |
1594 | vma = (bfd_vma) y << 56; | |
1595 | if (z == 1) | |
1596 | { | |
1597 | /* Get a 32-bit value. */ | |
1598 | if (bfd_bread (buf, 4, abfd) != 4) | |
1599 | goto error_return; | |
1600 | ||
1601 | vma += bfd_get_32 (abfd, buf); | |
1602 | } | |
1603 | else if (z == 2) | |
1604 | { | |
1605 | /* Get a 64-bit value. */ | |
1606 | if (bfd_bread (buf, 8, abfd) != 8) | |
1607 | goto error_return; | |
1608 | ||
1609 | vma += bfd_get_64 (abfd, buf); | |
1610 | } | |
1611 | else | |
1612 | { | |
1613 | (*_bfd_error_handler) | |
1614 | (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_loc\n"), | |
1615 | bfd_get_filename (abfd), z); | |
1616 | bfd_set_error (bfd_error_bad_value); | |
1617 | goto error_return; | |
1618 | } | |
1619 | ||
1620 | sec = mmo_decide_section (abfd, vma); | |
1621 | if (sec == NULL) | |
1622 | goto error_return; | |
1623 | break; | |
1624 | ||
1625 | case LOP_SKIP: | |
1626 | /* Move forward within the same section. */ | |
1627 | vma += y * 256 + z; | |
1628 | ||
1629 | sec = mmo_decide_section (abfd, vma); | |
1630 | if (sec == NULL) | |
1631 | goto error_return; | |
1632 | break; | |
1633 | ||
1634 | case LOP_FIXO: | |
1635 | /* A fixup: Store the current vma somewhere. Position using | |
1636 | same format as LOP_LOC. */ | |
1637 | { | |
1638 | bfd_vma p = (bfd_vma) y << 56; | |
1639 | asection *fixosec; | |
1640 | ||
1641 | if (z == 1) | |
1642 | { | |
1643 | /* Get a 32-bit value. */ | |
1644 | if (bfd_bread (buf, 4, abfd) != 4) | |
1645 | goto error_return; | |
1646 | ||
1647 | p += bfd_get_32 (abfd, buf); | |
1648 | } | |
1649 | else if (z == 2) | |
1650 | { | |
1651 | /* Get a 64-bit value. */ | |
1652 | if (bfd_bread (buf, 8, abfd) != 8) | |
1653 | goto error_return; | |
1654 | ||
1655 | p += bfd_get_64 (abfd, buf); | |
1656 | } | |
1657 | else | |
1658 | { | |
1659 | (*_bfd_error_handler) | |
1660 | (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_fixo\n"), | |
1661 | bfd_get_filename (abfd), z); | |
1662 | bfd_set_error (bfd_error_bad_value); | |
1663 | goto error_return; | |
1664 | } | |
1665 | ||
1666 | /* The section where we store this address might be a | |
1667 | different one than the current section. */ | |
1668 | fixosec = mmo_decide_section (abfd, p); | |
1669 | if (fixosec == NULL) | |
1670 | goto error_return; | |
1671 | mmo_xore_64 (fixosec, p, vma); | |
1672 | } | |
1673 | break; | |
1674 | ||
1675 | case LOP_FIXR: | |
1676 | /* A fixup: Store YZ of this lopcode into YZ at vma - 4 * yz. */ | |
1677 | { | |
1678 | unsigned int yz = (y * 256 + z); | |
1679 | bfd_vma p = vma + 2 - 4 * yz; | |
1680 | asection *fixrsec = mmo_decide_section (abfd, p); | |
1681 | if (fixrsec == NULL) | |
1682 | goto error_return; | |
1683 | mmo_xore_16 (fixrsec, p, yz); | |
1684 | } | |
1685 | break; | |
1686 | ||
1687 | case LOP_FIXRX: | |
1688 | /* A fixup, similar to lop_fixr, but taking larger numbers | |
1689 | and can change branches into the opposite direction | |
1690 | (gasp!). */ | |
1691 | { | |
1692 | bfd_vma delta; | |
1693 | bfd_vma p; | |
1694 | asection *fixrsec; | |
1695 | ||
1696 | if (y != 0) | |
1697 | { | |
1698 | (*_bfd_error_handler) | |
1699 | (_("%s: invalid mmo file: expected y = 0, got y = %d for lop_fixrx\n"), | |
1700 | bfd_get_filename (abfd), y); | |
1701 | bfd_set_error (bfd_error_bad_value); | |
1702 | goto error_return; | |
1703 | } | |
1704 | ||
1705 | if (z != 16 && z != 24) | |
1706 | { | |
1707 | (*_bfd_error_handler) | |
1708 | (_("%s: invalid mmo file: expected z = 16 or z = 24, got z = %d for lop_fixrx\n"), | |
1709 | bfd_get_filename (abfd), z); | |
1710 | bfd_set_error (bfd_error_bad_value); | |
1711 | goto error_return; | |
1712 | } | |
1713 | ||
1714 | /* Get the next 32-bit value. */ | |
1715 | if (bfd_bread (buf, 4, abfd) != 4) | |
1716 | goto error_return; | |
1717 | ||
1718 | delta = bfd_get_32 (abfd, buf); | |
1719 | ||
1720 | /* Do an, ehm, involved calculation for the location of | |
1721 | the fixup. See mmixal documentation for a verbose | |
1722 | explanation. We follow it verbosely here for the | |
1723 | readers delight. */ | |
1724 | if (buf[0] == 0) | |
1725 | p = vma - 4 * delta; | |
1726 | else if (buf[0] == 1) | |
1727 | p = vma - 4 * ((delta & 0xffffff) - (1 << z)); | |
1728 | else | |
1729 | { | |
1730 | (*_bfd_error_handler) | |
1731 | (_("%s: invalid mmo file: leading byte of operand word must be 0 or 1, got %d for lop_fixrx\n"), | |
1732 | bfd_get_filename (abfd), buf[0]); | |
1733 | bfd_set_error (bfd_error_bad_value); | |
1734 | goto error_return; | |
1735 | } | |
1736 | ||
1737 | fixrsec = mmo_decide_section (abfd, vma); | |
1738 | if (fixrsec == NULL) | |
1739 | goto error_return; | |
1740 | mmo_xore_32 (fixrsec, p, delta); | |
1741 | } | |
1742 | break; | |
1743 | ||
1744 | case LOP_FILE: | |
1745 | /* Set current file and perhaps the file name. Reset line | |
1746 | number. */ | |
1747 | if (z != 0) | |
1748 | { | |
1749 | char *fname = bfd_malloc (z * 4 + 1); | |
1750 | ||
1751 | if (fname == NULL) | |
1752 | { | |
1753 | (*_bfd_error_handler) | |
1754 | (_("%s: cannot allocate file name for file number %d, %d bytes\n"), | |
1755 | bfd_get_filename (abfd), y, z * 4 + 1); | |
1756 | bfd_set_error (bfd_error_system_call); | |
1757 | goto error_return; | |
1758 | } | |
1759 | ||
1760 | fname[z * 4] = 0; | |
1761 | ||
1762 | for (i = 0; i < z; i++) | |
1763 | { | |
1764 | if (bfd_bread (fname + i * 4, 4, abfd) != 4) | |
1765 | { | |
1766 | free (fname); | |
1767 | goto error_return; | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | if (file_names[y] != NULL) | |
1772 | { | |
1773 | (*_bfd_error_handler) | |
278b4623 HPN |
1774 | (_("%s: invalid mmo file: file number %d `%s'," |
1775 | " was already entered as `%s'\n"), | |
3c3bdf30 NC |
1776 | bfd_get_filename (abfd), y, fname, file_names[y]); |
1777 | bfd_set_error (bfd_error_bad_value); | |
1778 | goto error_return; | |
1779 | } | |
1780 | ||
1781 | file_names[y] = fname; | |
1782 | } | |
1783 | ||
1784 | if (file_names[y] == NULL) | |
1785 | { | |
1786 | (*_bfd_error_handler) | |
278b4623 HPN |
1787 | (_("%s: invalid mmo file: file name for number %d" |
1788 | " was not specified before use\n"), | |
3c3bdf30 NC |
1789 | bfd_get_filename (abfd), y); |
1790 | bfd_set_error (bfd_error_bad_value); | |
1791 | goto error_return; | |
1792 | } | |
1793 | ||
3c3bdf30 NC |
1794 | lineno = 0; |
1795 | break; | |
1796 | ||
1797 | case LOP_LINE: | |
1798 | /* Set line number. */ | |
1799 | lineno = y * 256 + z; | |
1800 | /* FIXME: Create a sequence of mmo-specific line number | |
1801 | entries for each section, then translate into canonical | |
1802 | format. */ | |
1803 | break; | |
1804 | ||
1805 | case LOP_SPEC: | |
1806 | /* Special data follows until the next non-lop_quote | |
1807 | lopcode. */ | |
1808 | non_spec_sec = sec; | |
1809 | non_spec_vma = vma; | |
1810 | sec = mmo_get_spec_section (abfd, y * 256 + z); | |
1811 | if (sec == NULL) | |
1812 | goto error_return; | |
1813 | ||
1814 | vma = sec->vma; | |
1815 | break; | |
1816 | ||
1817 | case LOP_PRE: | |
1818 | { | |
1819 | /* We ignore header information, except we read in the | |
1820 | creation time from the first 32-bit word with the time | |
1821 | in seconds since era. */ | |
1822 | if (z >= 1 | |
1823 | && bfd_bread (abfd->tdata.mmo_data->created, 4, | |
1824 | abfd) != 4) | |
1825 | goto error_return; | |
1826 | ||
1827 | for (i = 1; i < z; i++) | |
1828 | if (bfd_bread (buf, 4, abfd) != 4) | |
1829 | goto error_return; | |
1830 | } | |
1831 | break; | |
1832 | ||
1833 | case LOP_POST: | |
1834 | /* This tells of the contents of registers $Z..$255 at | |
1835 | startup. We make a section out of it, with VMA = Z * 8, | |
1836 | but only if Z != 255 or the contents is non-zero. */ | |
1837 | { | |
1838 | asection *rsec; | |
1839 | bfd_byte *loc; | |
1840 | bfd_vma first_octa; | |
1841 | bfd_vma startaddr_octa; | |
1842 | ||
1843 | /* Read first octaword outside loop to simplify logic when | |
1844 | excluding the Z == 255, octa == 0 case. */ | |
1845 | if (bfd_bread (buf, 8, abfd) != 8) | |
1846 | goto error_return; | |
1847 | ||
1848 | first_octa = bfd_get_64 (abfd, buf); | |
1849 | ||
1850 | /* Don't emit contents for the trivial case which is | |
1851 | always present; $255 pointing to Main. */ | |
1852 | if (z != 255) | |
1853 | { | |
1854 | rsec | |
1855 | = bfd_make_section_old_way (abfd, | |
1856 | MMIX_REG_CONTENTS_SECTION_NAME); | |
46fda84e | 1857 | rsec->flags |= SEC_LINKER_CREATED; |
3c3bdf30 NC |
1858 | rsec->vma = z * 8; |
1859 | loc = mmo_get_loc (rsec, z * 8, (255 - z) * 8); | |
1860 | bfd_put_64 (abfd, first_octa, loc); | |
1861 | ||
1862 | for (i = z + 1; i < 255; i++) | |
1863 | { | |
1864 | if (bfd_bread (loc + (i - z) * 8, 8, abfd) != 8) | |
1865 | goto error_return; | |
1866 | } | |
1867 | ||
1868 | /* Read out the last octabyte, and use it to set the | |
1869 | start address. */ | |
1870 | if (bfd_bread (buf, 8, abfd) != 8) | |
1871 | goto error_return; | |
1872 | ||
1873 | startaddr_octa = bfd_get_64 (abfd, buf); | |
1874 | } | |
1875 | else | |
1876 | startaddr_octa = first_octa; | |
1877 | ||
1878 | if (! bfd_set_start_address (abfd, startaddr_octa)) | |
1879 | { | |
1880 | /* Currently this can't fail, but this should handle | |
1881 | future failures. */ | |
1882 | bfd_set_error (bfd_error_bad_value); | |
1883 | goto error_return; | |
1884 | } | |
1885 | } | |
1886 | break; | |
1887 | ||
1888 | case LOP_STAB: | |
1889 | /* We read in the symbols now, not later. */ | |
1890 | if (y != 0 || z != 0) | |
1891 | { | |
1892 | (*_bfd_error_handler) | |
278b4623 HPN |
1893 | (_("%s: invalid mmo file: fields y and z of lop_stab" |
1894 | " non-zero, y: %d, z: %d\n"), | |
3c3bdf30 NC |
1895 | bfd_get_filename (abfd), y, z); |
1896 | bfd_set_error (bfd_error_bad_value); | |
1897 | goto error_return; | |
1898 | } | |
1899 | ||
1900 | /* Save the location, so we can check that YZ in the LOP_END | |
1901 | is correct. */ | |
1902 | stab_loc = bfd_tell (abfd); | |
1903 | ||
1904 | /* It's not said that an MMO can be without symbols (though | |
1905 | mmixal will refuse to assemble files without Main), but | |
1906 | it seems it would still be a valid mmo-file, so allow it. | |
1907 | We detect the absence of a symbol area in that the upper | |
1908 | limit is computed (from the lop_end YZ field) as 0. | |
1909 | Don't call mmo_get_symbols; it can only detect the end of | |
1910 | a valid symbol trie, not the absence of one. */ | |
1911 | if (abfd->tdata.mmo_data->max_symbol_length != 0 | |
1912 | && ! mmo_get_symbols (abfd)) | |
1913 | goto error_return; | |
1914 | break; | |
1915 | ||
1916 | case LOP_END: | |
1917 | { | |
1918 | /* This must be the last 32-bit word in an mmo file. | |
1919 | Let's find out. */ | |
1920 | struct stat statbuf; | |
74633dd0 | 1921 | file_ptr curpos = bfd_tell (abfd); |
3c3bdf30 NC |
1922 | |
1923 | if (bfd_stat (abfd, &statbuf) < 0) | |
1924 | goto error_return; | |
1925 | ||
1926 | if (statbuf.st_size != curpos) | |
1927 | { | |
1928 | (*_bfd_error_handler) | |
278b4623 HPN |
1929 | (_("%s: invalid mmo file: lop_end not last item in" |
1930 | " file\n"), | |
3c3bdf30 NC |
1931 | bfd_get_filename (abfd)); |
1932 | bfd_set_error (bfd_error_bad_value); | |
1933 | goto error_return; | |
1934 | } | |
1935 | ||
1936 | /* Check that the YZ field is right. Subtract the size of | |
1937 | this LOP_END in the calculation; YZ does not include | |
1938 | it. */ | |
1939 | if ((long) (y * 256 + z) * 4 != (curpos - stab_loc) - 4) | |
1940 | { | |
1941 | (*_bfd_error_handler) | |
278b4623 HPN |
1942 | (_("%s: invalid mmo file: YZ of lop_end (%ld)" |
1943 | " not equal to the number of tetras to the preceding" | |
1944 | " lop_stab (%ld)\n"), | |
3c3bdf30 NC |
1945 | bfd_get_filename (abfd), (long) (y * 256 + z), |
1946 | (curpos - stab_loc - 4)/4); | |
1947 | bfd_set_error (bfd_error_bad_value); | |
1948 | goto error_return; | |
1949 | } | |
1950 | ||
1951 | bfd_map_over_sections (abfd, mmo_map_set_sizes, NULL); | |
1952 | goto done; | |
1953 | } | |
1954 | } | |
1955 | } | |
1956 | else | |
1957 | { | |
1958 | /* This wasn't a lopcode, so store it in the current section. */ | |
1959 | mmo_xore_32 (sec, vma & ~3, bfd_get_32 (abfd, buf)); | |
1960 | vma += 4; | |
1961 | vma &= ~3; | |
1962 | lineno++; | |
1963 | } | |
1964 | } | |
1965 | ||
1966 | /* We know this file is a multiple of four bytes (checked in | |
1967 | mmo_object_p), so if we got something other than 0, this was a bad | |
1968 | file (although it's more likely we'll get 0 in that case too). | |
1969 | If we got end-of-file, then there was no lop_stab, so the file has | |
1970 | invalid format. */ | |
1971 | ||
1972 | if (nbytes_read != 0) | |
1973 | bfd_set_error (bfd_error_system_call); | |
1974 | else | |
1975 | bfd_set_error (bfd_error_bad_value); | |
1976 | ||
1977 | error_return: | |
b34976b6 | 1978 | error = TRUE; |
3c3bdf30 NC |
1979 | done: |
1980 | /* Mark the .text and .data section with their normal attribute if they | |
1981 | contain anything. This is not redundant wrt. mmo_decide_section, | |
1982 | since that code might never execute, and conversely the alloc+code | |
1983 | section flags must be set then. */ | |
1984 | sec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); | |
1985 | if (sec != NULL | |
1986 | && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) | |
1987 | && ! bfd_set_section_flags (abfd, sec, | |
1988 | bfd_get_section_flags (abfd, sec) | |
1989 | | SEC_ALLOC | SEC_LOAD | SEC_CODE)) | |
b34976b6 | 1990 | error = TRUE; |
3c3bdf30 NC |
1991 | |
1992 | sec = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); | |
1993 | if (sec != NULL | |
1994 | && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) | |
1995 | && ! bfd_set_section_flags (abfd, sec, | |
1996 | bfd_get_section_flags (abfd, sec) | |
1997 | | SEC_ALLOC | SEC_LOAD)) | |
b34976b6 | 1998 | error = TRUE; |
3c3bdf30 NC |
1999 | |
2000 | /* Free whatever resources we took. */ | |
2001 | for (i = 0; i < sizeof (file_names) / sizeof (file_names[0]); i++) | |
2002 | if (file_names[i]) | |
2003 | free (file_names[i]); | |
82e51918 | 2004 | return ! error; |
3c3bdf30 NC |
2005 | } |
2006 | ||
2007 | /* A hook to set up object file dependent section information. For mmo, | |
2008 | we point out the shape of allocated section contents. */ | |
2009 | ||
b34976b6 | 2010 | static bfd_boolean |
f592407e | 2011 | mmo_new_section_hook (bfd *abfd, asection *newsect) |
3c3bdf30 | 2012 | { |
3c3bdf30 | 2013 | if (!newsect->used_by_bfd) |
f592407e AM |
2014 | { |
2015 | /* We zero-fill all fields and assume NULL is represented by an all | |
2016 | zero-bit pattern. */ | |
2017 | newsect->used_by_bfd | |
2018 | = bfd_zalloc (abfd, sizeof (struct mmo_section_data_struct)); | |
2019 | if (!newsect->used_by_bfd) | |
2020 | return FALSE; | |
2021 | } | |
3c3bdf30 NC |
2022 | |
2023 | /* Always align to at least 32-bit words. */ | |
2024 | newsect->alignment_power = 2; | |
f592407e | 2025 | return _bfd_generic_new_section_hook (abfd, newsect); |
3c3bdf30 NC |
2026 | } |
2027 | ||
2028 | /* We already have section contents loaded for sections that have | |
2029 | contents. */ | |
2030 | ||
b34976b6 | 2031 | static bfd_boolean |
278b4623 HPN |
2032 | mmo_get_section_contents (bfd *abfd ATTRIBUTE_UNUSED, |
2033 | asection *sec, | |
2034 | void * location, | |
2035 | file_ptr offset, | |
2036 | bfd_size_type bytes_to_do) | |
3c3bdf30 NC |
2037 | { |
2038 | /* Iterate over diminishing chunk sizes, copying contents, like | |
2039 | mmo_set_section_contents. */ | |
2040 | while (bytes_to_do) | |
2041 | { | |
2042 | /* A minor song-and-dance to make sure we're not bitten by the | |
2043 | distant possibility of the cast from bfd_vma to int making the | |
2044 | chunk zero-sized. */ | |
2045 | int chunk_size | |
2046 | = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; | |
2047 | bfd_byte *loc; | |
2048 | ||
2049 | do | |
2050 | loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); | |
2051 | while (loc == NULL && (chunk_size /= 2) != 0); | |
2052 | ||
2053 | if (chunk_size == 0) | |
b34976b6 | 2054 | return FALSE; |
3c3bdf30 NC |
2055 | |
2056 | memcpy (location, loc, chunk_size); | |
2057 | ||
2058 | location += chunk_size; | |
2059 | bytes_to_do -= chunk_size; | |
2060 | offset += chunk_size; | |
2061 | } | |
b34976b6 | 2062 | return TRUE; |
3c3bdf30 NC |
2063 | } |
2064 | ||
2065 | /* Return the amount of memory needed to read the symbol table. */ | |
2066 | ||
2067 | static long | |
278b4623 | 2068 | mmo_get_symtab_upper_bound (bfd *abfd) |
3c3bdf30 NC |
2069 | { |
2070 | return (abfd->symcount + 1) * sizeof (asymbol *); | |
2071 | } | |
2072 | ||
2073 | /* Sort mmo symbols by serial number. */ | |
2074 | ||
2075 | static int | |
278b4623 | 2076 | mmo_sort_mmo_symbols (const void *arg1, const void *arg2) |
3c3bdf30 | 2077 | { |
3f9c735e AM |
2078 | const struct mmo_symbol *sym1 = *(const struct mmo_symbol **) arg1; |
2079 | const struct mmo_symbol *sym2 = *(const struct mmo_symbol **) arg2; | |
3c3bdf30 NC |
2080 | |
2081 | /* Sort by serial number first. */ | |
2082 | if (sym1->serno < sym2->serno) | |
2083 | return -1; | |
2084 | else if (sym1->serno > sym2->serno) | |
2085 | return 1; | |
2086 | ||
2087 | /* Then sort by address of the table entries. */ | |
3f9c735e | 2088 | return ((const char *) arg1 - (const char *) arg2); |
3c3bdf30 NC |
2089 | } |
2090 | ||
2091 | /* Translate the symbol table. */ | |
2092 | ||
2093 | static long | |
278b4623 | 2094 | mmo_canonicalize_symtab (bfd *abfd, asymbol **alocation) |
3c3bdf30 NC |
2095 | { |
2096 | unsigned int symcount = bfd_get_symcount (abfd); | |
2097 | asymbol *csymbols; | |
2098 | unsigned int i; | |
2099 | ||
2100 | csymbols = abfd->tdata.mmo_data->csymbols; | |
b9da616a | 2101 | if (csymbols == NULL && symcount != 0) |
3c3bdf30 NC |
2102 | { |
2103 | asymbol *c; | |
2104 | struct mmo_symbol *s; | |
2105 | struct mmo_symbol **msp; | |
2106 | ||
2107 | /* First we store the symbols into the table we'll return, then we | |
2108 | qsort it on the serial number, with secondary on the address of | |
2109 | the symbol, to preserve order if there would be non-unique serial | |
2110 | numbers. */ | |
2111 | for (s = abfd->tdata.mmo_data->symbols, | |
2112 | msp = (struct mmo_symbol **) alocation; | |
2113 | s != NULL; | |
2114 | s = s->next, ++msp) | |
2115 | *msp = s; | |
2116 | ||
2117 | *msp = NULL; | |
2118 | ||
2119 | qsort (alocation, symcount, sizeof (struct mmo_symbol *), | |
2120 | mmo_sort_mmo_symbols); | |
2121 | ||
2122 | csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol)); | |
b9da616a AM |
2123 | if (csymbols == NULL) |
2124 | return -1; | |
3c3bdf30 NC |
2125 | abfd->tdata.mmo_data->csymbols = csymbols; |
2126 | ||
2127 | for (msp = (struct mmo_symbol **) alocation, c = csymbols; | |
2128 | *msp != NULL; | |
2129 | msp++, ++c) | |
2130 | { | |
2131 | s = *msp; | |
2132 | c->the_bfd = abfd; | |
2133 | c->name = s->name; | |
2134 | c->value = s->value; | |
2135 | c->flags = BSF_GLOBAL; | |
2136 | ||
2137 | if (s->sym_type == mmo_data_sym) | |
2138 | { | |
2139 | c->section | |
2140 | = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); | |
2141 | ||
2142 | if (c->section == NULL) | |
2143 | c->section = bfd_abs_section_ptr; | |
2144 | else | |
2145 | c->value -= c->section->vma; | |
2146 | } | |
2147 | else if (s->sym_type == mmo_undef_sym) | |
2148 | c->section = bfd_und_section_ptr; | |
2149 | else if (s->sym_type == mmo_reg_sym) | |
2150 | { | |
2151 | c->section | |
2152 | = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); | |
46fda84e | 2153 | c->section->flags |= SEC_LINKER_CREATED; |
3c3bdf30 NC |
2154 | } |
2155 | else | |
2156 | { | |
2157 | asection *textsec | |
2158 | = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); | |
aa69fe43 | 2159 | asection *datasec; |
3c3bdf30 NC |
2160 | |
2161 | if (textsec != NULL | |
2162 | && c->value >= textsec->vma | |
eea6121a | 2163 | && c->value <= textsec->vma + textsec->size) |
3c3bdf30 NC |
2164 | { |
2165 | c->section = textsec; | |
2166 | c->value -= c->section->vma; | |
2167 | } | |
aa69fe43 HPN |
2168 | /* In mmo, symbol types depend on the VMA. Therefore, if |
2169 | the data section isn't within the usual bounds, its | |
2170 | symbols are marked as absolute. Correct that. This | |
2171 | means we can't have absolute symbols with values matching | |
2172 | data section addresses, but we also can't have with | |
2173 | absolute symbols with values matching text section | |
2174 | addresses. For such needs, use the ELF format. */ | |
2175 | else if ((datasec | |
2176 | = bfd_get_section_by_name (abfd, | |
2177 | MMO_DATA_SECTION_NAME)) | |
2178 | != NULL | |
2179 | && c->value >= datasec->vma | |
2180 | && c->value <= datasec->vma + datasec->size) | |
2181 | { | |
2182 | c->section = datasec; | |
2183 | c->value -= c->section->vma; | |
2184 | } | |
3c3bdf30 NC |
2185 | else |
2186 | c->section = bfd_abs_section_ptr; | |
2187 | } | |
2188 | ||
2189 | c->udata.p = NULL; | |
2190 | } | |
2191 | } | |
2192 | ||
2193 | /* Last, overwrite the incoming table with the right-type entries. */ | |
2194 | for (i = 0; i < symcount; i++) | |
2195 | *alocation++ = csymbols++; | |
2196 | *alocation = NULL; | |
2197 | ||
2198 | return symcount; | |
2199 | } | |
2200 | ||
3c3bdf30 NC |
2201 | /* Get information about a symbol. */ |
2202 | ||
2203 | static void | |
278b4623 HPN |
2204 | mmo_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED, |
2205 | asymbol *symbol, symbol_info *ret) | |
3c3bdf30 NC |
2206 | { |
2207 | bfd_symbol_info (symbol, ret); | |
2208 | } | |
2209 | ||
2210 | static void | |
278b4623 HPN |
2211 | mmo_print_symbol (bfd *abfd, void *afile, asymbol *symbol, |
2212 | bfd_print_symbol_type how) | |
3c3bdf30 NC |
2213 | { |
2214 | FILE *file = (FILE *) afile; | |
2215 | ||
2216 | switch (how) | |
2217 | { | |
2218 | case bfd_print_symbol_name: | |
2219 | fprintf (file, "%s", symbol->name); | |
2220 | break; | |
2221 | default: | |
278b4623 | 2222 | bfd_print_symbol_vandf (abfd, file, symbol); |
3c3bdf30 NC |
2223 | |
2224 | fprintf (file, " %-5s %s", | |
2225 | symbol->section->name, | |
2226 | symbol->name); | |
2227 | } | |
2228 | } | |
2229 | ||
2230 | /* We can't map a file directly into executable code, so the | |
2231 | size of header information is irrelevant. */ | |
2232 | ||
2233 | static int | |
278b4623 | 2234 | mmo_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, |
a6b96beb | 2235 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
3c3bdf30 NC |
2236 | { |
2237 | return 0; | |
2238 | } | |
2239 | ||
2240 | /* Write the (section-neutral) file preamble. */ | |
2241 | ||
b34976b6 | 2242 | static bfd_boolean |
278b4623 | 2243 | mmo_internal_write_header (bfd *abfd) |
3c3bdf30 | 2244 | { |
3f9c735e | 2245 | const char lop_pre_bfd[] = { LOP, LOP_PRE, 1, 1}; |
3c3bdf30 NC |
2246 | |
2247 | if (bfd_bwrite (lop_pre_bfd, 4, abfd) != 4) | |
b34976b6 | 2248 | return FALSE; |
3c3bdf30 NC |
2249 | |
2250 | /* Copy creation time of original file. */ | |
2251 | if (bfd_bwrite (abfd->tdata.mmo_data->created, 4, abfd) != 4) | |
b34976b6 | 2252 | return FALSE; |
3c3bdf30 | 2253 | |
b34976b6 | 2254 | return TRUE; |
3c3bdf30 NC |
2255 | } |
2256 | ||
2257 | /* Write the LOP_POST record, with global register initializations. | |
2258 | Z is the Z field of the LOP_POST, corresponding to 255 - number of | |
2259 | registers at DATA. The Z = 255 field is filled in with the | |
2260 | start-address. */ | |
2261 | ||
b34976b6 | 2262 | static bfd_boolean |
278b4623 | 2263 | mmo_internal_write_post (bfd *abfd, int z, asection *sec) |
3c3bdf30 NC |
2264 | { |
2265 | int i; | |
2266 | bfd_byte buf[8]; | |
2267 | mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_POST << 16) | z); | |
2268 | ||
2269 | for (i = z; i < 255; i++) | |
2270 | { | |
2271 | bfd_byte *data = mmo_get_loc (sec, i * 8, 8); | |
2272 | ||
2273 | if (bfd_bwrite (data, 8, abfd) != 8) | |
b34976b6 | 2274 | return FALSE; |
3c3bdf30 NC |
2275 | } |
2276 | ||
2277 | /* For Z == $255, we always emit the start location; supposedly Main, | |
2278 | but we have it handy at bfd_get_start_address. If we're called with | |
2279 | Z == 255, don't assume DATA is valid. */ | |
2280 | bfd_put_64 (abfd, bfd_get_start_address (abfd), buf); | |
2281 | ||
82e51918 | 2282 | return ! abfd->tdata.mmo_data->have_error && bfd_bwrite (buf, 8, abfd) == 8; |
3c3bdf30 NC |
2283 | } |
2284 | ||
2285 | /* Translate to and from BFD flags. This is to make sure that we don't | |
2286 | get bitten by BFD flag number changes. */ | |
2287 | ||
2288 | static flagword | |
278b4623 | 2289 | mmo_sec_flags_from_bfd_flags (flagword flags) |
3c3bdf30 NC |
2290 | { |
2291 | flagword oflags = 0; | |
2292 | ||
2293 | if (flags & SEC_ALLOC) | |
2294 | oflags |= MMO_SEC_ALLOC; | |
2295 | if (flags & SEC_LOAD) | |
2296 | oflags |= MMO_SEC_LOAD; | |
2297 | if (flags & SEC_RELOC) | |
2298 | oflags |= MMO_SEC_RELOC; | |
2299 | if (flags & SEC_READONLY) | |
2300 | oflags |= MMO_SEC_READONLY; | |
2301 | if (flags & SEC_CODE) | |
2302 | oflags |= MMO_SEC_CODE; | |
2303 | if (flags & SEC_DATA) | |
2304 | oflags |= MMO_SEC_DATA; | |
2305 | if (flags & SEC_NEVER_LOAD) | |
2306 | oflags |= MMO_SEC_NEVER_LOAD; | |
2307 | if (flags & SEC_IS_COMMON) | |
2308 | oflags |= MMO_SEC_IS_COMMON; | |
2309 | if (flags & SEC_DEBUGGING) | |
2310 | oflags |= MMO_SEC_DEBUGGING; | |
2311 | ||
2312 | return oflags; | |
2313 | } | |
2314 | ||
2315 | static flagword | |
278b4623 | 2316 | bfd_sec_flags_from_mmo_flags (flagword flags) |
3c3bdf30 NC |
2317 | { |
2318 | flagword oflags = 0; | |
2319 | ||
2320 | if (flags & MMO_SEC_ALLOC) | |
2321 | oflags |= SEC_ALLOC; | |
2322 | if (flags & MMO_SEC_LOAD) | |
2323 | oflags |= SEC_LOAD; | |
2324 | if (flags & MMO_SEC_RELOC) | |
2325 | oflags |= SEC_RELOC; | |
2326 | if (flags & MMO_SEC_READONLY) | |
2327 | oflags |= SEC_READONLY; | |
2328 | if (flags & MMO_SEC_CODE) | |
2329 | oflags |= SEC_CODE; | |
2330 | if (flags & MMO_SEC_DATA) | |
2331 | oflags |= SEC_DATA; | |
2332 | if (flags & MMO_SEC_NEVER_LOAD) | |
2333 | oflags |= SEC_NEVER_LOAD; | |
2334 | if (flags & MMO_SEC_IS_COMMON) | |
2335 | oflags |= SEC_IS_COMMON; | |
2336 | if (flags & MMO_SEC_DEBUGGING) | |
2337 | oflags |= SEC_DEBUGGING; | |
2338 | ||
2339 | return oflags; | |
2340 | } | |
2341 | ||
aa69fe43 HPN |
2342 | /* Return TRUE iff the leading or trailing tetrabyte in SEC is defined and |
2343 | is 0. */ | |
2344 | ||
2345 | static bfd_boolean | |
278b4623 | 2346 | mmo_has_leading_or_trailing_zero_tetra_p (bfd *abfd, asection *sec) |
aa69fe43 HPN |
2347 | { |
2348 | bfd_vma secaddr = bfd_get_section_vma (abfd, sec); | |
2349 | ||
2350 | if (sec->size < 4) | |
2351 | return FALSE; | |
2352 | ||
2353 | if (bfd_get_32 (abfd, mmo_get_loc (sec, secaddr, 4)) == 0 | |
2354 | && bfd_get_32 (abfd, | |
2355 | mmo_get_loc (sec, secaddr + sec->size - 4, 4)) == 0) | |
2356 | return TRUE; | |
2357 | ||
2358 | return FALSE; | |
2359 | } | |
2360 | ||
3c3bdf30 NC |
2361 | /* Write a section. */ |
2362 | ||
b34976b6 | 2363 | static bfd_boolean |
278b4623 | 2364 | mmo_internal_write_section (bfd *abfd, asection *sec) |
3c3bdf30 NC |
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) | |
aa69fe43 HPN |
2379 | { |
2380 | bfd_vma secaddr = bfd_get_section_vma (abfd, sec); | |
2381 | ||
2382 | /* Because leading and trailing zeros are omitted in output, we need to | |
2383 | specify the section boundaries so they're correct when the file | |
2384 | is read in again. That's also the case if this section is | |
2385 | specified as not within its usual boundaries or alignments. */ | |
2386 | if (sec->size != 0 | |
2387 | && (secaddr + sec->size >= (bfd_vma) 1 << 56 | |
2388 | || (secaddr & 3) != 0 | |
2389 | || (sec->size & 3) != 0 | |
2390 | || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) | |
2391 | { | |
2392 | if (!mmo_write_section_description (abfd, sec)) | |
2393 | return FALSE; | |
2394 | } | |
2395 | ||
2396 | /* FIXME: Output source file name and line number. */ | |
2397 | return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); | |
2398 | } | |
3c3bdf30 | 2399 | else if (strcmp (sec->name, MMO_DATA_SECTION_NAME) == 0) |
aa69fe43 HPN |
2400 | { |
2401 | bfd_vma secaddr = bfd_get_section_vma (abfd, sec); | |
2402 | ||
2403 | /* Same goes as for MMO_TEXT_SECTION_NAME above. */ | |
2404 | if (sec->size != 0 | |
2405 | && (secaddr < (bfd_vma) 0x20 << 56 | |
2406 | || secaddr + sec->size >= (bfd_vma) 0x21 << 56 | |
2407 | || (secaddr & 3) != 0 | |
2408 | || (sec->size & 3) != 0 | |
2409 | || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) | |
2410 | { | |
2411 | if (!mmo_write_section_description (abfd, sec)) | |
2412 | return FALSE; | |
2413 | } | |
2414 | ||
2415 | return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); | |
2416 | } | |
3c3bdf30 NC |
2417 | else if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) |
2418 | /* Not handled here. */ | |
2419 | { | |
2420 | /* This would normally be an abort call since this can't happen, but | |
2421 | we don't do that. */ | |
2422 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2423 | return FALSE; |
3c3bdf30 | 2424 | } |
0112cd26 | 2425 | else if (CONST_STRNEQ (sec->name, MMIX_OTHER_SPEC_SECTION_PREFIX)) |
3c3bdf30 NC |
2426 | { |
2427 | int n = atoi (sec->name + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)); | |
0112cd26 | 2428 | |
3c3bdf30 | 2429 | mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_SPEC << 16) | n); |
82e51918 | 2430 | return (! abfd->tdata.mmo_data->have_error |
68bfbfcc | 2431 | && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); |
3c3bdf30 NC |
2432 | } |
2433 | /* Ignore sections that are just allocated or empty; we write out | |
2434 | _contents_ here. */ | |
2435 | else if ((bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) != 0 | |
eea6121a | 2436 | && sec->size != 0) |
3c3bdf30 | 2437 | { |
aa69fe43 HPN |
2438 | if (!mmo_write_section_description (abfd, sec)) |
2439 | return FALSE; | |
2440 | ||
2441 | /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually | |
2442 | loaded. */ | |
2443 | if (bfd_get_section_flags (abfd, sec) & SEC_LOAD) | |
2444 | return (! abfd->tdata.mmo_data->have_error | |
2445 | && mmo_write_loc_chunk_list (abfd, | |
2446 | mmo_section_data (sec)->head)); | |
2447 | return (! abfd->tdata.mmo_data->have_error | |
2448 | && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); | |
2449 | } | |
2450 | ||
2451 | /* Some section without contents. */ | |
2452 | return TRUE; | |
2453 | } | |
2454 | ||
2455 | /* Write the description of a section, extended-mmo-style. */ | |
2456 | ||
2457 | static bfd_boolean | |
278b4623 | 2458 | mmo_write_section_description (bfd *abfd, asection *sec) |
aa69fe43 HPN |
2459 | { |
2460 | /* Keep the following document-comment formatted the way it is. */ | |
3c3bdf30 NC |
2461 | /* |
2462 | INODE | |
2463 | mmo section mapping, , Symbol-table, mmo | |
2464 | SUBSECTION | |
2465 | mmo section mapping | |
2466 | ||
2467 | The implementation in BFD uses special data type 80 (decimal) to | |
2468 | encapsulate and describe named sections, containing e.g.@: debug | |
2469 | information. If needed, any datum in the encapsulation will be | |
2470 | quoted using lop_quote. First comes a 32-bit word holding the | |
2471 | number of 32-bit words containing the zero-terminated zero-padded | |
2472 | segment name. After the name there's a 32-bit word holding flags | |
2473 | describing the section type. Then comes a 64-bit big-endian word | |
2474 | with the section length (in bytes), then another with the section | |
2475 | start address. Depending on the type of section, the contents | |
2476 | might follow, zero-padded to 32-bit boundary. For a loadable | |
2477 | section (such as data or code), the contents might follow at some | |
2478 | later point, not necessarily immediately, as a lop_loc with the | |
2479 | same start address as in the section description, followed by the | |
2480 | contents. This in effect forms a descriptor that must be emitted | |
2481 | before the actual contents. Sections described this way must not | |
2482 | overlap. | |
2483 | ||
2484 | For areas that don't have such descriptors, synthetic sections are | |
2485 | formed by BFD. Consecutive contents in the two memory areas | |
2486 | @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} and | |
2487 | @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} are entered in | |
2488 | sections named <<.text>> and <<.data>> respectively. If an area | |
2489 | is not otherwise described, but would together with a neighboring | |
2490 | lower area be less than @samp{0x40000000} bytes long, it is joined | |
2491 | with the lower area and the gap is zero-filled. For other cases, | |
2492 | a new section is formed, named <<.MMIX.sec.@var{n}>>. Here, | |
2493 | @var{n} is a number, a running count through the mmo file, | |
2494 | starting at 0. | |
2495 | ||
2496 | EXAMPLE | |
2497 | A loadable section specified as: | |
2498 | ||
2499 | | .section secname,"ax" | |
2500 | | TETRA 1,2,3,4,-1,-2009 | |
2501 | | BYTE 80 | |
2502 | ||
2503 | and linked to address @samp{0x4}, is represented by the sequence: | |
2504 | ||
2505 | | 0x98080050 - lop_spec 80 | |
2506 | | 0x00000002 - two 32-bit words for the section name | |
2507 | | 0x7365636e - "secn" | |
2508 | | 0x616d6500 - "ame\0" | |
2509 | | 0x00000033 - flags CODE, READONLY, LOAD, ALLOC | |
2510 | | 0x00000000 - high 32 bits of section length | |
2511 | | 0x0000001c - section length is 28 bytes; 6 * 4 + 1 + alignment to 32 bits | |
2512 | | 0x00000000 - high 32 bits of section address | |
2513 | | 0x00000004 - section address is 4 | |
2514 | | 0x98010002 - 64 bits with address of following data | |
dfa36a69 HPN |
2515 | | 0x00000000 - high 32 bits of address |
2516 | | 0x00000004 - low 32 bits: data starts at address 4 | |
3c3bdf30 NC |
2517 | | 0x00000001 - 1 |
2518 | | 0x00000002 - 2 | |
2519 | | 0x00000003 - 3 | |
2520 | | 0x00000004 - 4 | |
2521 | | 0xffffffff - -1 | |
2522 | | 0xfffff827 - -2009 | |
2523 | | 0x50000000 - 80 as a byte, padded with zeros. | |
2524 | ||
2525 | Note that the lop_spec wrapping does not include the section | |
2526 | contents. Compare this to a non-loaded section specified as: | |
2527 | ||
2528 | | .section thirdsec | |
2529 | | TETRA 200001,100002 | |
2530 | | BYTE 38,40 | |
2531 | ||
2532 | This, when linked to address @samp{0x200000000000001c}, is | |
2533 | represented by: | |
2534 | ||
2535 | | 0x98080050 - lop_spec 80 | |
2536 | | 0x00000002 - two 32-bit words for the section name | |
2537 | | 0x7365636e - "thir" | |
2538 | | 0x616d6500 - "dsec" | |
2539 | | 0x00000010 - flag READONLY | |
2540 | | 0x00000000 - high 32 bits of section length | |
2541 | | 0x0000000c - section length is 12 bytes; 2 * 4 + 2 + alignment to 32 bits | |
dfa36a69 HPN |
2542 | | 0x20000000 - high 32 bits of address |
2543 | | 0x0000001c - low 32 bits of address 0x200000000000001c | |
3c3bdf30 NC |
2544 | | 0x00030d41 - 200001 |
2545 | | 0x000186a2 - 100002 | |
2546 | | 0x26280000 - 38, 40 as bytes, padded with zeros | |
2547 | ||
dfa36a69 | 2548 | For the latter example, the section contents must not be |
3c3bdf30 NC |
2549 | loaded in memory, and is therefore specified as part of the |
2550 | special data. The address is usually unimportant but might | |
2551 | provide information for e.g.@: the DWARF 2 debugging format. */ | |
2552 | ||
aa69fe43 HPN |
2553 | mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION); |
2554 | mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4); | |
f075ee0c | 2555 | mmo_write_chunk (abfd, (bfd_byte *) sec->name, strlen (sec->name)); |
aa69fe43 HPN |
2556 | mmo_flush_chunk (abfd); |
2557 | /* FIXME: We can get debug sections (.debug_line & Co.) with a section | |
2558 | flag still having SEC_RELOC set. Investigate. This might be true | |
2559 | for all alien sections; perhaps mmo.em should clear that flag. Might | |
2560 | be related to weak references. */ | |
2561 | mmo_write_tetra (abfd, | |
2562 | mmo_sec_flags_from_bfd_flags | |
2563 | (bfd_get_section_flags (abfd, sec))); | |
2564 | mmo_write_octa (abfd, sec->size); | |
2565 | mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec)); | |
b34976b6 | 2566 | return TRUE; |
3c3bdf30 NC |
2567 | } |
2568 | ||
2569 | /* We save up all data before output. */ | |
2570 | ||
b34976b6 | 2571 | static bfd_boolean |
278b4623 HPN |
2572 | mmo_set_section_contents (bfd *abfd ATTRIBUTE_UNUSED, sec_ptr sec, |
2573 | const void *location, file_ptr offset, | |
2574 | bfd_size_type bytes_to_do) | |
3c3bdf30 NC |
2575 | { |
2576 | /* Iterate over diminishing chunk sizes, copying contents. */ | |
2577 | while (bytes_to_do) | |
2578 | { | |
2579 | /* A minor song-and-dance to make sure we're not bitten by the | |
2580 | distant possibility of the cast from bfd_vma to int making the | |
2581 | chunk zero-sized. */ | |
2582 | int chunk_size | |
2583 | = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; | |
2584 | bfd_byte *loc; | |
2585 | ||
2586 | do | |
2587 | loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); | |
2588 | while (loc == NULL && (chunk_size /= 2) != 0); | |
2589 | ||
2590 | if (chunk_size == 0) | |
b34976b6 | 2591 | return FALSE; |
3c3bdf30 NC |
2592 | |
2593 | memcpy (loc, location, chunk_size); | |
2594 | ||
2595 | location += chunk_size; | |
2596 | bytes_to_do -= chunk_size; | |
2597 | offset += chunk_size; | |
2598 | } | |
b34976b6 | 2599 | return TRUE; |
3c3bdf30 NC |
2600 | } |
2601 | ||
2602 | /* Add a symbol to a trie-tree. */ | |
2603 | ||
b34976b6 | 2604 | static bfd_boolean |
278b4623 HPN |
2605 | mmo_internal_add_3_sym (bfd *abfd, struct mmo_symbol_trie *rootp, |
2606 | const struct mmo_symbol *symp) | |
3c3bdf30 | 2607 | { |
3f9c735e | 2608 | const char *name = symp->name; |
3c3bdf30 NC |
2609 | struct mmo_symbol_trie *trie = rootp; |
2610 | struct mmo_symbol_trie **triep = NULL; | |
2611 | ||
2612 | while (*name && trie != NULL) | |
2613 | { | |
2614 | if (*name < trie->symchar) | |
2615 | { | |
2616 | triep = &trie->left; | |
2617 | trie = trie->left; | |
2618 | } | |
2619 | else if (*name > trie->symchar) | |
2620 | { | |
2621 | triep = &trie->right; | |
2622 | trie = trie->right; | |
2623 | } | |
2624 | else if (*name == trie->symchar) | |
2625 | { | |
2626 | triep = &trie->middle; | |
2627 | name++; | |
2628 | ||
2629 | /* Make sure "trie" points to where we should fill in the | |
2630 | current symbol whenever we've iterated through "name". We | |
2631 | would lose the right position if we encounter "foobar" then | |
2632 | "foo". */ | |
2633 | if (*name) | |
2634 | trie = trie->middle; | |
2635 | } | |
2636 | } | |
2637 | ||
2638 | while (*name != 0) | |
2639 | { | |
2640 | /* Create middle branches for the rest of the characters. */ | |
2641 | trie = bfd_zalloc (abfd, sizeof (struct mmo_symbol_trie)); | |
2642 | *triep = trie; | |
2643 | trie->symchar = *name++; | |
2644 | triep = &trie->middle; | |
2645 | } | |
2646 | ||
2647 | /* We discover a duplicate symbol rather late in the process, but still; | |
2648 | we discover it and bail out. */ | |
2649 | if (trie->sym.name != NULL) | |
2650 | { | |
2651 | (*_bfd_error_handler) | |
2652 | (_("%s: invalid symbol table: duplicate symbol `%s'\n"), | |
2653 | bfd_get_filename (abfd), trie->sym.name); | |
2654 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2655 | return FALSE; |
3c3bdf30 NC |
2656 | } |
2657 | ||
2658 | memcpy (&trie->sym, symp, sizeof *symp); | |
b34976b6 | 2659 | return TRUE; |
3c3bdf30 NC |
2660 | } |
2661 | ||
2662 | /* Find out the length of the serialized version of a trie in bytes. */ | |
2663 | ||
2664 | static unsigned int | |
278b4623 | 2665 | mmo_internal_3_length (bfd *abfd, struct mmo_symbol_trie *trie) |
3c3bdf30 NC |
2666 | { |
2667 | /* First, one for the control byte. */ | |
2668 | unsigned int length = 1; | |
2669 | ||
2670 | if (trie == NULL) | |
2671 | return 0; | |
2672 | ||
2673 | /* Add in the recursion to the left. */ | |
2674 | length += mmo_internal_3_length (abfd, trie->left); | |
2675 | ||
2676 | /* Add in the middle trie and the character. */ | |
2677 | length += 1 + mmo_internal_3_length (abfd, trie->middle); | |
2678 | ||
2679 | /* Add in the recursion to the right. */ | |
2680 | length += mmo_internal_3_length (abfd, trie->right); | |
2681 | ||
2682 | /* Add in bytes for the symbol (if this is an endnode). */ | |
2683 | if (trie->sym.name != NULL) | |
2684 | { | |
2685 | unsigned int serno = trie->sym.serno; | |
2686 | ||
2687 | /* First what it takes to encode the value. */ | |
2688 | if (trie->sym.sym_type == mmo_reg_sym) | |
2689 | length++; | |
2690 | else if (trie->sym.sym_type == mmo_undef_sym) | |
2691 | length += 2; | |
2692 | else | |
2693 | { | |
2694 | bfd_vma value = trie->sym.value; | |
2695 | ||
2696 | /* Coded in one to eight following bytes. */ | |
2697 | if (trie->sym.sym_type == mmo_data_sym) | |
2698 | value -= (bfd_vma) 0x20 << 56; | |
2699 | ||
2700 | do | |
2701 | { | |
2702 | value >>= 8; | |
2703 | length++; | |
2704 | } | |
2705 | while (value != 0); | |
2706 | } | |
2707 | ||
2708 | /* Find out what it takes to encode the serial number. */ | |
2709 | do | |
2710 | { | |
2711 | serno >>= 7; | |
2712 | length++; | |
2713 | } | |
2714 | while (serno != 0); | |
2715 | } | |
2716 | ||
2717 | return length; | |
2718 | } | |
2719 | ||
2720 | /* Helper function for outputting the serial number of a symbol, output as | |
2721 | a variant of leb128 (see dwarf2 documentation) which could be called | |
2722 | beb128. Using a helper function and recursion simplifies debugging. */ | |
2723 | ||
2724 | static void | |
278b4623 | 2725 | mmo_beb128_out (bfd *abfd, int serno, int marker) |
3c3bdf30 NC |
2726 | { |
2727 | if (serno & ~0x7f) | |
2728 | mmo_beb128_out (abfd, serno >> 7, 0); | |
2729 | mmo_write_byte (abfd, marker | (serno & 0x7f)); | |
2730 | } | |
2731 | ||
2732 | /* Serialize a trie. */ | |
2733 | ||
2734 | static void | |
278b4623 | 2735 | mmo_internal_3_dump (bfd *abfd, struct mmo_symbol_trie *trie) |
3c3bdf30 NC |
2736 | { |
2737 | bfd_byte control = 0; | |
2738 | ||
2739 | if (trie == NULL) | |
2740 | return; | |
2741 | ||
2742 | if (trie->left) | |
2743 | control |= MMO3_LEFT; | |
2744 | ||
2745 | if (trie->middle) | |
2746 | control |= MMO3_MIDDLE; | |
2747 | ||
2748 | if (trie->right) | |
2749 | control |= MMO3_RIGHT; | |
2750 | ||
2751 | if (trie->sym.name != NULL) | |
2752 | { | |
2753 | /* Encode the symbol type and length of value bytes. */ | |
2754 | if (trie->sym.sym_type == mmo_reg_sym) | |
2755 | control |= MMO3_REGQUAL_BITS; | |
2756 | else if (trie->sym.sym_type == mmo_undef_sym) | |
2757 | control |= MMO3_UNDEF; | |
2758 | else | |
2759 | { | |
2760 | bfd_vma value = trie->sym.value; | |
2761 | ||
2762 | /* Coded in 1..8 following bytes. */ | |
2763 | if (trie->sym.sym_type == mmo_data_sym) | |
2764 | { | |
2765 | control |= MMO3_DATA; | |
2766 | value -= (bfd_vma) 0x20 << 56; | |
2767 | } | |
2768 | ||
2769 | do | |
2770 | { | |
2771 | value >>= 8; | |
2772 | control++; | |
2773 | } | |
2774 | while (value != 0); | |
2775 | } | |
2776 | } | |
2777 | ||
2778 | /* The control byte is output before recursing. */ | |
2779 | mmo_write_byte (abfd, control); | |
2780 | ||
2781 | mmo_internal_3_dump (abfd, trie->left); | |
2782 | ||
2783 | if (control & MMO3_SYMBITS) | |
2784 | { | |
2785 | mmo_write_byte (abfd, trie->symchar); | |
2786 | ||
2787 | if (trie->sym.name != NULL) | |
2788 | { | |
2789 | if (trie->sym.sym_type == mmo_reg_sym) | |
2790 | mmo_write_byte (abfd, trie->sym.value); | |
2791 | else if (trie->sym.sym_type == mmo_undef_sym) | |
2792 | { | |
2793 | mmo_write_byte (abfd, 0); | |
2794 | mmo_write_byte (abfd, 0); | |
2795 | } | |
2796 | else | |
2797 | { | |
2798 | bfd_vma value = trie->sym.value; | |
2799 | ||
2800 | bfd_byte byte_n = control & 15; | |
2801 | ||
2802 | /* Coded in 1..8 following bytes. Note that the value is | |
2803 | shifted out big-endian. */ | |
2804 | if (trie->sym.sym_type == mmo_data_sym) | |
2805 | { | |
2806 | value -= (bfd_vma) 0x20 << 56; | |
2807 | byte_n -= 8; | |
2808 | } | |
2809 | ||
2810 | do | |
2811 | { | |
2812 | mmo_write_byte (abfd, (value >> ((byte_n - 1) * 8)) & 0xff); | |
2813 | byte_n--; | |
2814 | } | |
2815 | while (byte_n != 0); | |
2816 | } | |
2817 | ||
2818 | mmo_beb128_out (abfd, trie->sym.serno, 128); | |
2819 | } | |
2820 | mmo_internal_3_dump (abfd, trie->middle); | |
2821 | } | |
2822 | mmo_internal_3_dump (abfd, trie->right); | |
2823 | } | |
2824 | ||
dfa36a69 | 2825 | /* Write symbols in mmo format. Also write the lop_end terminator. */ |
3c3bdf30 | 2826 | |
b34976b6 | 2827 | static bfd_boolean |
278b4623 | 2828 | mmo_write_symbols_and_terminator (bfd *abfd) |
3c3bdf30 NC |
2829 | { |
2830 | int count = bfd_get_symcount (abfd); | |
3c3bdf30 | 2831 | asymbol **table; |
dfa36a69 HPN |
2832 | asymbol **orig_table = bfd_get_outsymbols (abfd); |
2833 | int serno; | |
3c3bdf30 NC |
2834 | struct mmo_symbol_trie root; |
2835 | int trie_len; | |
2836 | int i; | |
2837 | bfd_byte buf[4]; | |
2838 | ||
2839 | /* Create a symbol for "Main". */ | |
dfa36a69 | 2840 | asymbol *fakemain = bfd_make_empty_symbol (abfd); |
3c3bdf30 | 2841 | |
dfa36a69 HPN |
2842 | fakemain->flags = BSF_GLOBAL; |
2843 | fakemain->value = bfd_get_start_address (abfd); | |
2844 | fakemain->name = MMIX_START_SYMBOL_NAME; | |
2845 | fakemain->section = bfd_abs_section_ptr; | |
3c3bdf30 NC |
2846 | |
2847 | memset (&root, 0, sizeof (root)); | |
2848 | ||
2849 | /* Make all symbols take a left turn. */ | |
2850 | root.symchar = 0xff; | |
2851 | ||
dfa36a69 HPN |
2852 | /* There must always be a ":Main", so we'll add one if there are no |
2853 | symbols. Make sure we have room for it. */ | |
2854 | table = bfd_alloc (abfd, (count + 1) * sizeof (asymbol *)); | |
2855 | if (table == NULL) | |
b34976b6 | 2856 | return FALSE; |
dfa36a69 HPN |
2857 | |
2858 | memcpy (table, orig_table, count * sizeof (asymbol *)); | |
2859 | ||
2860 | /* Move :Main (if there is one) to the first position. This is | |
2861 | necessary to get the same layout of the trie-tree when linking as | |
2862 | when objcopying the result as in the objcopy.exp test "simple objcopy | |
2863 | of executable". It also automatically takes care of assigning serial | |
2864 | number 1 to :Main (as is mandatory). */ | |
2865 | for (i = 0; i < count; i++) | |
2866 | if (table[i] != NULL | |
2867 | && strcmp (table[i]->name, MMIX_START_SYMBOL_NAME) == 0 | |
2868 | && (table[i]->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL) | |
2869 | { | |
2870 | asymbol *mainsym = table[i]; | |
2871 | memcpy (table + 1, orig_table, i * sizeof (asymbol *)); | |
2872 | table[0] = mainsym; | |
2873 | ||
2874 | /* Check that the value assigned to :Main is the same as the entry | |
2875 | address. The default linker script asserts this. This is as | |
2876 | good a place as any to check this consistency. */ | |
2877 | if ((mainsym->value | |
2878 | + mainsym->section->output_section->vma | |
2879 | + mainsym->section->output_offset) | |
2880 | != bfd_get_start_address (abfd)) | |
2881 | { | |
2882 | /* Arbitrary buffer to hold the printable representation of a | |
2883 | vma. */ | |
2884 | char vmas_main[40]; | |
2885 | char vmas_start[40]; | |
2886 | bfd_vma vma_start = bfd_get_start_address (abfd); | |
2887 | ||
2888 | sprintf_vma (vmas_main, mainsym->value); | |
2889 | sprintf_vma (vmas_start, vma_start); | |
2890 | ||
2891 | (*_bfd_error_handler) | |
278b4623 HPN |
2892 | (_("%s: Bad symbol definition: `Main' set to %s rather" |
2893 | " than the start address %s\n"), | |
dfa36a69 HPN |
2894 | bfd_get_filename (abfd), vmas_main, vmas_start); |
2895 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2896 | return FALSE; |
dfa36a69 HPN |
2897 | } |
2898 | break; | |
2899 | } | |
2900 | if (i == count && count != 0) | |
3c3bdf30 | 2901 | { |
dfa36a69 HPN |
2902 | /* When there are symbols, there must be a :Main. There was no |
2903 | :Main, so we need to add it manually. */ | |
2904 | memcpy (table + 1, orig_table, count * sizeof (asymbol *)); | |
2905 | table[0] = fakemain; | |
2906 | count++; | |
3c3bdf30 | 2907 | } |
3c3bdf30 | 2908 | |
dfa36a69 | 2909 | for (i = 0, serno = 1; i < count && table[i] != NULL; i++) |
3c3bdf30 NC |
2910 | { |
2911 | asymbol *s = table[i]; | |
2912 | ||
2913 | /* It's not enough to consult bfd_is_local_label, since it does not | |
2914 | mean "local" in the sense of linkable-and-observable-after-link. | |
2915 | Let's just check the BSF_GLOBAL flag. | |
2916 | ||
2917 | Also, don't export symbols with characters not in the allowed set. */ | |
2918 | if ((s->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL | |
2919 | && strspn (s->name, | |
2920 | valid_mmo_symbol_character_set) == strlen (s->name)) | |
2921 | { | |
2922 | struct mmo_symbol sym; | |
2923 | memset (&sym, 0, sizeof (sym)); | |
2924 | ||
278b4623 HPN |
2925 | /* Need to strip const here; strdup:ing would leak and the |
2926 | existing string must be safe to reuse. */ | |
2927 | sym.name = (char *) s->name; | |
3c3bdf30 NC |
2928 | sym.value = |
2929 | s->value | |
2930 | + s->section->output_section->vma | |
2931 | + s->section->output_offset; | |
2932 | ||
2933 | if (bfd_is_und_section (s->section)) | |
2934 | sym.sym_type = mmo_undef_sym; | |
2935 | else if (strcmp (s->section->name, MMO_DATA_SECTION_NAME) == 0 | |
2936 | /* The encoding of data symbols require that the "rest" | |
2937 | of the value fits in 6 bytes, so the upper two bytes | |
2938 | must be 0x2000. All other symbols get to be the | |
2939 | absolute type. */ | |
2940 | && (sym.value >> 48) == 0x2000) | |
2941 | sym.sym_type = mmo_data_sym; | |
2942 | else if (strcmp (s->section->name, MMIX_REG_SECTION_NAME) == 0) | |
2943 | sym.sym_type = mmo_reg_sym; | |
2944 | else if (strcmp (s->section->name, | |
2945 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
2946 | { | |
2947 | sym.sym_type = mmo_reg_sym; | |
2948 | sym.value /= 8; | |
2949 | } | |
2950 | else | |
2951 | sym.sym_type = mmo_abs_sym; | |
2952 | ||
2953 | /* FIXME: We assume the order of the received symbols is an | |
2954 | ordered mapping of the serial numbers. This is not | |
2955 | necessarily true if we e.g. objcopy a mmo file to another and | |
dfa36a69 | 2956 | there are gaps in the numbering. Not sure if this can |
3c3bdf30 | 2957 | happen. Not sure what to do. */ |
dfa36a69 | 2958 | sym.serno = serno++; |
3c3bdf30 NC |
2959 | |
2960 | if (! mmo_internal_add_3_sym (abfd, &root, &sym)) | |
b34976b6 | 2961 | return FALSE; |
3c3bdf30 NC |
2962 | } |
2963 | } | |
2964 | ||
2965 | /* Change the root node to be a ":"-prefix. */ | |
2966 | root.symchar = ':'; | |
2967 | root.middle = root.left; | |
2968 | root.right = NULL; | |
2969 | root.left = NULL; | |
2970 | ||
2971 | /* We have to find out if we can fit the whole symbol table in the mmo | |
2972 | symtab. It would be bad to assume we can always fit it in 262144 | |
2973 | bytes. If we can't, just leave the Main symbol. */ | |
2974 | trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; | |
2975 | ||
2976 | if (trie_len > 0xffff) | |
2977 | { | |
2978 | /* Test this code by using a lower limit in the test above and check | |
2979 | that the single "Main" symbol is emitted and handled properly. | |
2980 | There's no specific test-case. */ | |
2981 | struct mmo_symbol sym; | |
2982 | ||
2983 | (*_bfd_error_handler) | |
278b4623 HPN |
2984 | (_("%s: warning: symbol table too large for mmo, larger than 65535" |
2985 | " 32-bit words: %d. Only `Main' will be emitted.\n"), | |
3c3bdf30 NC |
2986 | bfd_get_filename (abfd), trie_len); |
2987 | ||
2988 | memset (&sym, 0, sizeof (sym)); | |
2989 | sym.sym_type = mmo_abs_sym; | |
2990 | sym.name = MMIX_START_SYMBOL_NAME; | |
2991 | sym.serno = 1; | |
2992 | sym.value = bfd_get_start_address (abfd); | |
2993 | ||
2994 | /* Then patch up a symbol table to be just the ":Main" symbol. */ | |
2995 | memset (&root, 0, sizeof (root)); | |
2996 | root.left = root.middle; | |
2997 | root.symchar = 0xff; | |
2998 | root.middle = NULL; | |
2999 | root.right = NULL; | |
3000 | ||
3001 | if (! mmo_internal_add_3_sym (abfd, &root, &sym)) | |
b34976b6 | 3002 | return FALSE; |
3c3bdf30 NC |
3003 | |
3004 | root.symchar = ':'; | |
3005 | root.middle = root.left; | |
3006 | root.right = NULL; | |
3007 | root.left = NULL; | |
3008 | ||
3009 | trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; | |
3010 | } | |
3011 | ||
3012 | /* Reset the written-bytes counter. */ | |
3013 | abfd->tdata.mmo_data->byte_no = 0; | |
3014 | ||
3015 | /* Put out the lop_stab mark. */ | |
3016 | bfd_put_32 (abfd, (LOP << 24) | (LOP_STAB << 16), buf); | |
3017 | if (bfd_bwrite (buf, 4, abfd) != 4) | |
b34976b6 | 3018 | return FALSE; |
3c3bdf30 NC |
3019 | |
3020 | /* Dump out symbols. */ | |
3021 | mmo_internal_3_dump (abfd, &root); | |
3022 | ||
3023 | if (trie_len != (abfd->tdata.mmo_data->byte_no + 3)/4) | |
3024 | { | |
3025 | /* I haven't seen this trig. It seems no use claiming this case | |
3026 | isn't debugged and abort if we get here. Instead emit a | |
3027 | diagnostic and fail "normally". */ | |
3028 | (*_bfd_error_handler) | |
278b4623 HPN |
3029 | (_("%s: internal error, symbol table changed size from %d to %d" |
3030 | " words\n"), | |
3c3bdf30 NC |
3031 | bfd_get_filename (abfd), trie_len, |
3032 | (abfd->tdata.mmo_data->byte_no + 3)/4); | |
3033 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3034 | return FALSE; |
3c3bdf30 NC |
3035 | } |
3036 | ||
3037 | /* Dump out remaining bytes in the buffer and handle I/O errors by | |
3038 | propagating errors. */ | |
3039 | if ((abfd->tdata.mmo_data->byte_no % 4) != 0 | |
3040 | || abfd->tdata.mmo_data->have_error) | |
3041 | { | |
3042 | memset (abfd->tdata.mmo_data->buf + (abfd->tdata.mmo_data->byte_no % 4), | |
3043 | 0, 4 - (abfd->tdata.mmo_data->byte_no % 4)); | |
3044 | ||
3045 | if (abfd->tdata.mmo_data->have_error | |
3046 | || bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) | |
b34976b6 | 3047 | return FALSE; |
3c3bdf30 NC |
3048 | } |
3049 | ||
3050 | bfd_put_32 (abfd, (LOP << 24) | (LOP_END << 16) | trie_len, buf); | |
3051 | return bfd_bwrite (buf, 4, abfd) == 4; | |
3052 | } | |
3053 | ||
3054 | /* Write section unless it is the register contents section. For that, we | |
3055 | instead store the section in the supplied pointer. This function is | |
3056 | used through bfd_map_over_sections. */ | |
3057 | ||
3058 | static void | |
278b4623 | 3059 | mmo_write_section_unless_reg_contents (bfd *abfd, asection *sec, void *p) |
3c3bdf30 NC |
3060 | { |
3061 | struct mmo_write_sec_info *infop = (struct mmo_write_sec_info *) p; | |
3062 | ||
82e51918 | 3063 | if (! infop->retval) |
3c3bdf30 NC |
3064 | return; |
3065 | ||
3066 | if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
3067 | { | |
3068 | infop->reg_section = sec; | |
3069 | return; | |
3070 | } | |
3071 | ||
3072 | /* Exclude the convenience register section. */ | |
3073 | if (strcmp (sec->name, MMIX_REG_SECTION_NAME) == 0) | |
3074 | { | |
3075 | if (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) | |
3076 | { | |
3077 | /* Make sure it hasn't got contents. It seems impossible to | |
3078 | make it carry contents, so we don't have a test-case for | |
3079 | this. */ | |
3080 | (*_bfd_error_handler) | |
278b4623 HPN |
3081 | (_("%s: internal error, internal register section %s had" |
3082 | " contents\n"), | |
3c3bdf30 NC |
3083 | bfd_get_filename (abfd), sec->name); |
3084 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3085 | infop->retval = FALSE; |
3c3bdf30 NC |
3086 | return; |
3087 | } | |
3088 | ||
3089 | return; | |
3090 | } | |
3091 | ||
3092 | infop->retval = mmo_internal_write_section (abfd, sec); | |
3093 | } | |
3094 | ||
3095 | /* Do the actual output of a file. Assumes mmo_set_section_contents is | |
3096 | already called. */ | |
3097 | ||
b34976b6 | 3098 | static bfd_boolean |
278b4623 | 3099 | mmo_write_object_contents (bfd *abfd) |
3c3bdf30 NC |
3100 | { |
3101 | struct mmo_write_sec_info wsecinfo; | |
3102 | ||
3103 | /* First, there are a few words of preamble. */ | |
3104 | if (! mmo_internal_write_header (abfd)) | |
b34976b6 | 3105 | return FALSE; |
3c3bdf30 NC |
3106 | |
3107 | wsecinfo.reg_section = NULL; | |
b34976b6 | 3108 | wsecinfo.retval = TRUE; |
3c3bdf30 NC |
3109 | |
3110 | bfd_map_over_sections (abfd, mmo_write_section_unless_reg_contents, | |
278b4623 | 3111 | &wsecinfo); |
3c3bdf30 | 3112 | |
82e51918 | 3113 | if (! wsecinfo.retval) |
b34976b6 | 3114 | return FALSE; |
3c3bdf30 NC |
3115 | |
3116 | if (wsecinfo.reg_section != NULL) | |
3117 | { | |
3118 | asection *sec = wsecinfo.reg_section; | |
3119 | unsigned int z = (unsigned int) (sec->vma / 8); | |
3120 | ||
3121 | /* Registers 0..31 must not be global. Do sanity check on the "vma" | |
3122 | of the register contents section and check that it corresponds to | |
3123 | the length of the section. */ | |
3124 | if (z < 32 || z >= 255 || (sec->vma & 7) != 0 | |
eea6121a | 3125 | || sec->vma != 256 * 8 - sec->size - 8) |
3c3bdf30 NC |
3126 | { |
3127 | bfd_set_error (bfd_error_bad_value); | |
3128 | ||
eea6121a | 3129 | if (sec->size == 0) |
3c3bdf30 NC |
3130 | /* There must always be at least one such register. */ |
3131 | (*_bfd_error_handler) | |
3132 | (_("%s: no initialized registers; section length 0\n"), | |
3133 | bfd_get_filename (abfd)); | |
3134 | else if (sec->vma > (256 - 32) * 8) | |
3135 | /* Provide better error message for the case of too many | |
3136 | global registers. */ | |
3137 | (*_bfd_error_handler) | |
3138 | (_("%s: too many initialized registers; section length %ld\n"), | |
3139 | bfd_get_filename (abfd), | |
eea6121a | 3140 | (long) sec->size); |
3c3bdf30 NC |
3141 | else |
3142 | (*_bfd_error_handler) | |
278b4623 HPN |
3143 | (_("%s: invalid start address for initialized registers of" |
3144 | " length %ld: 0x%lx%08lx\n"), | |
3c3bdf30 | 3145 | bfd_get_filename (abfd), |
eea6121a | 3146 | (long) sec->size, |
3c3bdf30 NC |
3147 | (unsigned long) (sec->vma >> 32), (unsigned long) (sec->vma)); |
3148 | ||
b34976b6 | 3149 | return FALSE; |
3c3bdf30 NC |
3150 | } |
3151 | ||
3152 | if (! mmo_internal_write_post (abfd, z, sec)) | |
b34976b6 | 3153 | return FALSE; |
3c3bdf30 NC |
3154 | } |
3155 | else | |
3156 | if (! mmo_internal_write_post (abfd, 255, NULL)) | |
b34976b6 | 3157 | return FALSE; |
3c3bdf30 NC |
3158 | |
3159 | return mmo_write_symbols_and_terminator (abfd); | |
3160 | } | |
3161 | ||
3c3bdf30 NC |
3162 | /* If there's anything in particular in a mmo bfd that we want to free, |
3163 | make this a real function. Only do this if you see major memory | |
3164 | thrashing; zealous free:ing will cause unwanted behavior, especially if | |
3165 | you "free" memory allocated with "bfd_alloc", or even "bfd_release" a | |
3166 | block allocated with "bfd_alloc"; they're really allocated from an | |
3167 | obstack, and we don't know what was allocated there since this | |
3168 | particular allocation. */ | |
3169 | ||
3170 | #define mmo_close_and_cleanup _bfd_generic_close_and_cleanup | |
3171 | #define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info | |
3172 | ||
3173 | /* Perhaps we need to adjust this one; mmo labels (originally) without a | |
3174 | leading ':' might more appropriately be called local. */ | |
3175 | #define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name | |
3c9458e9 NC |
3176 | #define mmo_bfd_is_target_special_symbol \ |
3177 | ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) | |
3c3bdf30 NC |
3178 | |
3179 | /* Is this one really used or defined by anyone? */ | |
3180 | #define mmo_get_lineno _bfd_nosymbols_get_lineno | |
3181 | ||
3182 | /* FIXME: We can do better on this one, if we have a dwarf2 .debug_line | |
3183 | section or if MMO line numbers are implemented. */ | |
3184 | #define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line | |
4ab527b0 | 3185 | #define mmo_find_inliner_info _bfd_nosymbols_find_inliner_info |
3f3c5c34 | 3186 | #define mmo_make_empty_symbol _bfd_generic_make_empty_symbol |
3c3bdf30 NC |
3187 | #define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol |
3188 | #define mmo_read_minisymbols _bfd_generic_read_minisymbols | |
3189 | #define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol | |
3190 | ||
3191 | #define mmo_get_section_contents_in_window \ | |
3192 | _bfd_generic_get_section_contents_in_window | |
3193 | #define mmo_bfd_get_relocated_section_contents \ | |
3194 | bfd_generic_get_relocated_section_contents | |
3195 | #define mmo_bfd_gc_sections bfd_generic_gc_sections | |
ae17ab41 | 3196 | #define mmo_bfd_lookup_section_flags bfd_generic_lookup_section_flags |
3c3bdf30 | 3197 | #define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create |
e2d34d7d | 3198 | #define mmo_bfd_link_hash_table_free _bfd_generic_link_hash_table_free |
3c3bdf30 | 3199 | #define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols |
2d653fc7 | 3200 | #define mmo_bfd_link_just_syms _bfd_generic_link_just_syms |
1338dd10 PB |
3201 | #define mmo_bfd_copy_link_hash_symbol_type \ |
3202 | _bfd_generic_copy_link_hash_symbol_type | |
3c3bdf30 NC |
3203 | #define mmo_bfd_final_link _bfd_generic_final_link |
3204 | #define mmo_bfd_link_split_section _bfd_generic_link_split_section | |
3205 | ||
3206 | /* Strictly speaking, only MMIX uses this restricted format, but let's not | |
3207 | stop anybody from shooting themselves in the foot. */ | |
3208 | #define mmo_set_arch_mach bfd_default_set_arch_mach | |
3209 | #define mmo_bfd_relax_section bfd_generic_relax_section | |
3210 | #define mmo_bfd_merge_sections bfd_generic_merge_sections | |
72adc230 | 3211 | #define mmo_bfd_is_group_section bfd_generic_is_group_section |
e61463e1 | 3212 | #define mmo_bfd_discard_group bfd_generic_discard_group |
082b7297 L |
3213 | #define mmo_section_already_linked \ |
3214 | _bfd_generic_section_already_linked | |
3023e3f6 | 3215 | #define mmo_bfd_define_common_symbol bfd_generic_define_common_symbol |
3c3bdf30 | 3216 | |
3c3bdf30 NC |
3217 | /* We want to copy time of creation, otherwise we'd use |
3218 | BFD_JUMP_TABLE_COPY (_bfd_generic). */ | |
3219 | #define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data | |
3220 | #define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data | |
3221 | #define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data | |
80fccad2 | 3222 | #define mmo_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data |
3c3bdf30 NC |
3223 | #define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags |
3224 | #define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data | |
3225 | ||
3f9c735e | 3226 | const bfd_target bfd_mmo_vec = |
3c3bdf30 NC |
3227 | { |
3228 | "mmo", /* name */ | |
3229 | bfd_target_mmo_flavour, | |
3230 | BFD_ENDIAN_BIG, /* target byte order */ | |
3231 | BFD_ENDIAN_BIG, /* target headers byte order */ | |
3232 | ||
3233 | /* FIXME: Might need adjustments. */ | |
3234 | (HAS_RELOC | EXEC_P | /* object flags */ | |
3235 | HAS_LINENO | HAS_DEBUG | | |
3236 | HAS_SYMS | HAS_LOCALS | WP_TEXT), | |
3237 | ||
3238 | /* FIXME: Might need adjustments. */ | |
3239 | (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | |
3240 | | SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY), | |
3241 | /* section flags */ | |
3242 | 0, /* leading underscore */ | |
3243 | ' ', /* ar_pad_char */ | |
3244 | 16, /* ar_max_namelen */ | |
0aabe54e | 3245 | 0, /* match priority. */ |
3c3bdf30 NC |
3246 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
3247 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
3248 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ | |
3249 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
3250 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
3251 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
3252 | ||
3253 | { | |
3254 | _bfd_dummy_target, | |
3255 | mmo_object_p, /* bfd_check_format */ | |
3256 | _bfd_dummy_target, | |
3257 | _bfd_dummy_target, | |
3258 | }, | |
3259 | { | |
3260 | bfd_false, | |
3261 | mmo_mkobject, | |
3262 | bfd_false, | |
3263 | bfd_false, | |
3264 | }, | |
3265 | { /* bfd_write_contents */ | |
3266 | bfd_false, | |
3267 | mmo_write_object_contents, | |
3268 | bfd_false, | |
3269 | bfd_false, | |
3270 | }, | |
3271 | ||
3272 | BFD_JUMP_TABLE_GENERIC (mmo), | |
3273 | BFD_JUMP_TABLE_COPY (mmo), | |
3274 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
3275 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
3276 | BFD_JUMP_TABLE_SYMBOLS (mmo), | |
72f6ea61 | 3277 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), |
3c3bdf30 NC |
3278 | BFD_JUMP_TABLE_WRITE (mmo), |
3279 | BFD_JUMP_TABLE_LINK (mmo), | |
3280 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
3281 | ||
3282 | NULL, | |
3283 | ||
3284 | NULL | |
3285 | }; |