Commit | Line | Data |
---|---|---|
3c3bdf30 | 1 | /* BFD back-end for mmo objects (MMIX-specific object-format). |
6f2750fe | 2 | Copyright (C) 2001-2016 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 | 31 | @command{mmix} which is available at |
52f4ea79 | 32 | @url{http://mmix.cs.hm.edu/src/index.html} |
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 | |
52f4ea79 | 39 | @url{http://mmix.cs.hm.edu/} 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 | |
52f4ea79 | 78 | @url{http://mmix.cs.hm.edu/doc/mmixal.pdf}, |
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 | |
1218d67d HPN |
91 | and 2 for the data segment. Beware that the low bits of non- |
92 | tetrabyte-aligned values are silently discarded when being | |
93 | automatically incremented and when storing contents (in contrast | |
94 | to e.g. its use as current location when followed by lop_fixo | |
95 | et al before the next possibly-quoted tetrabyte contents). | |
3c3bdf30 NC |
96 | |
97 | @item lop_skip | |
98 | 0x9802YYZZ. Increase the current location by @samp{YZ} bytes. | |
99 | ||
100 | @item lop_fixo | |
101 | 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location | |
102 | as 64 bits into the location pointed to by the next 32-bit | |
103 | (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y * | |
104 | 2^56}. | |
105 | ||
106 | @item lop_fixr | |
107 | 0x9804YYZZ. @samp{YZ} is stored into the current location plus | |
108 | @math{2 - 4 * YZ}. | |
109 | ||
110 | @item lop_fixrx | |
111 | 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from | |
112 | the following 32-bit word are used in a manner similar to | |
113 | @samp{YZ} in lop_fixr: it is xor:ed into the current location | |
114 | minus @math{4 * L}. The first byte of the word is 0 or 1. If it | |
115 | is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0, | |
116 | then @math{L = (@var{lowest 24 bits of word})}. | |
117 | ||
118 | @item lop_file | |
119 | 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of | |
120 | 32-bit words. Set the file number to @samp{Y} and the line | |
121 | counter to 0. The next @math{Z * 4} bytes contain the file name, | |
122 | padded with zeros if the count is not a multiple of four. The | |
123 | same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for | |
124 | all but the first occurrence. | |
125 | ||
126 | @item lop_line | |
127 | 0x9807YYZZ. @samp{YZ} is the line number. Together with | |
128 | lop_file, it forms the source location for the next 32-bit word. | |
129 | Note that for each non-lopcode 32-bit word, line numbers are | |
130 | assumed incremented by one. | |
131 | ||
132 | @item lop_spec | |
133 | 0x9808YYZZ. @samp{YZ} is the type number. Data until the next | |
134 | lopcode other than lop_quote forms special data of type @samp{YZ}. | |
135 | @xref{mmo section mapping}. | |
136 | ||
137 | Other types than 80, (or type 80 with a content that does not | |
138 | parse) is stored in sections named <<.MMIX.spec_data.@var{n}>> | |
139 | where @var{n} is the @samp{YZ}-type. The flags for such a | |
140 | sections say not to allocate or load the data. The vma is 0. | |
141 | Contents of multiple occurrences of special data @var{n} is | |
142 | concatenated to the data of the previous lop_spec @var{n}s. The | |
143 | location in data or code at which the lop_spec occurred is lost. | |
144 | ||
145 | @item lop_pre | |
146 | 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the | |
147 | length of header information in 32-bit words, where the first word | |
148 | tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}. | |
149 | ||
150 | @item lop_post | |
151 | 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all | |
152 | content-generating lopcodes in a program. The @samp{Z} field | |
153 | denotes the value of @samp{rG} at the beginning of the program. | |
154 | The following @math{256 - Z} big-endian 64-bit words are loaded | |
155 | into global registers @samp{$G} @dots{} @samp{$255}. | |
156 | ||
157 | @item lop_stab | |
158 | 0x980b0000. The next-to-last lopcode in a program. Must follow | |
159 | immediately after the lop_post lopcode and its data. After this | |
160 | lopcode follows all symbols in a compressed format | |
161 | (@pxref{Symbol-table}). | |
162 | ||
163 | @item lop_end | |
164 | 0x980cYYZZ. The last lopcode in a program. It must follow the | |
165 | lop_stab lopcode and its data. The @samp{YZ} field contains the | |
166 | number of 32-bit words of symbol table information after the | |
167 | preceding lop_stab lopcode. | |
168 | @end table | |
169 | ||
170 | Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and | |
171 | <<lop_fixo>> are not generated by BFD, but are handled. They are | |
172 | generated by <<mmixal>>. | |
173 | ||
174 | EXAMPLE | |
175 | This trivial one-label, one-instruction file: | |
176 | ||
177 | | :Main TRAP 1,2,3 | |
178 | ||
179 | can be represented this way in mmo: | |
180 | ||
181 | | 0x98090101 - lop_pre, one 32-bit word with timestamp. | |
182 | | <timestamp> | |
183 | | 0x98010002 - lop_loc, text segment, using a 64-bit address. | |
184 | | Note that mmixal does not emit this for the file above. | |
185 | | 0x00000000 - Address, high 32 bits. | |
186 | | 0x00000000 - Address, low 32 bits. | |
187 | | 0x98060002 - lop_file, 2 32-bit words for file-name. | |
188 | | 0x74657374 - "test" | |
189 | | 0x2e730000 - ".s\0\0" | |
190 | | 0x98070001 - lop_line, line 1. | |
191 | | 0x00010203 - TRAP 1,2,3 | |
192 | | 0x980a00ff - lop_post, setting $255 to 0. | |
193 | | 0x00000000 | |
194 | | 0x00000000 | |
195 | | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. | |
196 | | 0x203a4040 @xref{Symbol-table}. | |
197 | | 0x10404020 | |
198 | | 0x4d206120 | |
199 | | 0x69016e00 | |
200 | | 0x81000000 | |
201 | | 0x980c0005 - lop_end; symbol table contained five 32-bit words. */ | |
202 | ||
3c3bdf30 | 203 | #include "sysdep.h" |
3db64b00 | 204 | #include "bfd.h" |
3c3bdf30 NC |
205 | #include "libbfd.h" |
206 | #include "libiberty.h" | |
207 | #include "elf/mmix.h" | |
208 | #include "opcode/mmix.h" | |
3c3bdf30 NC |
209 | |
210 | #define LOP 0x98 | |
211 | #define LOP_QUOTE 0 | |
212 | #define LOP_LOC 1 | |
213 | #define LOP_SKIP 2 | |
214 | #define LOP_FIXO 3 | |
215 | #define LOP_FIXR 4 | |
216 | #define LOP_FIXRX 5 | |
217 | #define LOP_FILE 6 | |
218 | #define LOP_LINE 7 | |
219 | #define LOP_SPEC 8 | |
220 | #define LOP_PRE 9 | |
221 | #define LOP_POST 10 | |
222 | #define LOP_STAB 11 | |
223 | #define LOP_END 12 | |
224 | ||
225 | #define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1) | |
226 | #define SPEC_DATA_SECTION 80 | |
227 | #define LOP_SPEC_SECTION \ | |
228 | ((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION) | |
229 | ||
230 | /* Must be a power of two. If you change this to be >= 64k, you need a | |
231 | new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */ | |
232 | #define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15) | |
233 | ||
234 | /* An arbitrary number for the maximum length section name size. */ | |
235 | #define MAX_SECTION_NAME_SIZE (1024 * 1024) | |
236 | ||
237 | /* A quite arbitrary number for the maximum length section size. */ | |
238 | #define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024) | |
239 | ||
240 | #define MMO3_WCHAR 0x80 | |
241 | #define MMO3_LEFT 0x40 | |
242 | #define MMO3_MIDDLE 0x20 | |
243 | #define MMO3_RIGHT 0x10 | |
244 | #define MMO3_TYPEBITS 0xf | |
245 | #define MMO3_REGQUAL_BITS 0xf | |
246 | #define MMO3_UNDEF 2 | |
247 | #define MMO3_DATA 8 | |
248 | #define MMO3_SYMBITS 0x2f | |
249 | ||
250 | /* Put these everywhere in new code. */ | |
251 | #define FATAL_DEBUG \ | |
252 | _bfd_abort (__FILE__, __LINE__, \ | |
253 | "Internal: Non-debugged code (test-case missing)") | |
254 | ||
255 | #define BAD_CASE(x) \ | |
256 | _bfd_abort (__FILE__, __LINE__, \ | |
257 | "bad case for " #x) | |
258 | ||
259 | enum mmo_sym_type { mmo_reg_sym, mmo_undef_sym, mmo_data_sym, mmo_abs_sym}; | |
260 | ||
261 | /* When scanning the mmo file, a linked list of mmo_symbol | |
262 | structures is built to represent the symbol table (if there is | |
263 | one). */ | |
264 | ||
265 | struct mmo_symbol | |
266 | { | |
267 | struct mmo_symbol *next; | |
278b4623 | 268 | char *name; |
3c3bdf30 NC |
269 | bfd_vma value; |
270 | enum mmo_sym_type sym_type; | |
271 | unsigned int serno; | |
272 | }; | |
273 | ||
274 | struct mmo_data_list_struct | |
275 | { | |
276 | struct mmo_data_list_struct *next; | |
277 | bfd_vma where; | |
278 | bfd_size_type size; | |
279 | bfd_size_type allocated_size; | |
280 | bfd_byte data[1]; | |
281 | }; | |
282 | ||
283 | typedef struct mmo_data_list_struct mmo_data_list_type; | |
284 | ||
285 | struct mmo_symbol_trie | |
286 | { | |
287 | struct mmo_symbol_trie *left; | |
288 | struct mmo_symbol_trie *right; | |
289 | struct mmo_symbol_trie *middle; | |
290 | ||
291 | bfd_byte symchar; | |
292 | ||
293 | /* A zero name means there's nothing here. */ | |
294 | struct mmo_symbol sym; | |
295 | }; | |
296 | ||
297 | /* The mmo tdata information. */ | |
298 | ||
299 | struct mmo_data_struct | |
300 | { | |
301 | struct mmo_symbol *symbols; | |
302 | struct mmo_symbol *symtail; | |
303 | asymbol *csymbols; | |
304 | ||
305 | /* File representation of time (NULL) when this file was created. */ | |
306 | bfd_byte created[4]; | |
307 | ||
308 | /* When we're reading bytes recursively, check this occasionally. | |
309 | Also holds write errors. */ | |
b34976b6 | 310 | bfd_boolean have_error; |
3c3bdf30 NC |
311 | |
312 | /* Max symbol length that may appear in the lop_stab table. Note that | |
313 | this table might just hold a subset of symbols for not-really large | |
314 | programs, as it can only be 65536 * 4 bytes large. */ | |
315 | int max_symbol_length; | |
316 | ||
317 | /* Here's the symbol we build in lop_stab. */ | |
318 | char *lop_stab_symbol; | |
319 | ||
320 | /* Index into lop_stab_symbol for the next character when parsing the | |
321 | symbol information. */ | |
322 | int symbol_position; | |
323 | ||
324 | /* When creating arbitrary sections, we need to count section numbers. */ | |
325 | int sec_no; | |
326 | ||
327 | /* When writing or reading byte-wise, we need to count the bytes | |
328 | within a 32-bit word. */ | |
329 | int byte_no; | |
330 | ||
331 | /* We also need a buffer to hold the bytes we count reading or writing. */ | |
332 | bfd_byte buf[4]; | |
c287bfe4 HPN |
333 | |
334 | /* Whether we've calculated symbol consistency requirement yet. We do this | |
335 | when-needed, which must be at some time after all section | |
336 | contents is known. */ | |
337 | bfd_boolean symbol_consistency_override_calculated; | |
338 | ||
339 | /* Whether to consistency-check symbol values, in particular "Main". */ | |
340 | bfd_boolean ignore_symbol_consistency; | |
3c3bdf30 NC |
341 | }; |
342 | ||
343 | typedef struct mmo_data_struct tdata_type; | |
344 | ||
345 | struct mmo_section_data_struct | |
346 | { | |
347 | mmo_data_list_type *head; | |
348 | mmo_data_list_type *tail; | |
349 | }; | |
350 | ||
68bfbfcc AM |
351 | #define mmo_section_data(sec) \ |
352 | ((struct mmo_section_data_struct *) (sec)->used_by_bfd) | |
353 | ||
3c3bdf30 NC |
354 | /* These structures are used in bfd_map_over_sections constructs. */ |
355 | ||
356 | /* Used when writing out sections; all but the register contents section | |
357 | which is stored in reg_section. */ | |
358 | struct mmo_write_sec_info | |
359 | { | |
360 | asection *reg_section; | |
b34976b6 | 361 | bfd_boolean retval; |
3c3bdf30 NC |
362 | }; |
363 | ||
364 | /* Used when trying to find a section corresponding to addr. */ | |
365 | struct mmo_find_sec_info | |
366 | { | |
367 | asection *sec; | |
368 | bfd_vma addr; | |
369 | }; | |
370 | ||
278b4623 HPN |
371 | static bfd_boolean mmo_bfd_copy_private_bfd_data (bfd *, bfd *); |
372 | static void mmo_write_section_unless_reg_contents (bfd *, asection *, void *); | |
373 | static void mmo_find_sec_w_addr (bfd *, asection *, void *); | |
374 | static void mmo_find_sec_w_addr_grow (bfd *, asection *, void *); | |
375 | static asection *mmo_make_section (bfd *, const char *); | |
376 | static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); | |
68ffbac6 | 377 | static void mmo_print_symbol (bfd *, void *, asymbol *, |
278b4623 HPN |
378 | bfd_print_symbol_type); |
379 | static void mmo_init (void); | |
380 | static bfd_boolean mmo_mkobject (bfd *); | |
381 | static bfd_boolean mmo_scan (bfd *); | |
382 | static asection *mmo_decide_section (bfd *, bfd_vma); | |
383 | static asection *mmo_get_generic_spec_data_section (bfd *, int); | |
384 | static asection *mmo_get_spec_section (bfd *, int); | |
385 | static INLINE bfd_byte *mmo_get_loc (asection *, bfd_vma, int); | |
386 | static void mmo_xore_64 (asection *, bfd_vma vma, bfd_vma value); | |
387 | static void mmo_xore_32 (asection *, bfd_vma vma, unsigned int); | |
388 | static void mmo_xore_16 (asection *, bfd_vma vma, unsigned int); | |
389 | static const bfd_target *mmo_object_p (bfd *); | |
390 | static void mmo_map_set_sizes (bfd *, asection *, void *); | |
391 | static bfd_boolean mmo_get_symbols (bfd *); | |
392 | static bfd_boolean mmo_create_symbol (bfd *, const char *, bfd_vma, | |
393 | enum mmo_sym_type, unsigned int); | |
394 | static bfd_boolean mmo_get_section_contents (bfd *, asection *, void *, | |
395 | file_ptr, bfd_size_type); | |
396 | static long mmo_get_symtab_upper_bound (bfd *); | |
397 | static long mmo_canonicalize_symtab (bfd *, asymbol **); | |
398 | static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); | |
399 | static void mmo_print_symbol (bfd *, void *, asymbol *, | |
400 | bfd_print_symbol_type); | |
401 | static bfd_boolean mmo_set_section_contents (bfd *, sec_ptr, const void *, | |
402 | file_ptr, bfd_size_type); | |
a6b96beb | 403 | static int mmo_sizeof_headers (bfd *, struct bfd_link_info *); |
278b4623 HPN |
404 | static bfd_boolean mmo_internal_write_header (bfd *); |
405 | static bfd_boolean mmo_internal_write_post (bfd *, int, asection *); | |
406 | static bfd_boolean mmo_internal_add_3_sym (bfd *, struct mmo_symbol_trie *, | |
407 | const struct mmo_symbol *); | |
408 | static unsigned int mmo_internal_3_length (bfd *, struct mmo_symbol_trie *); | |
409 | static void mmo_internal_3_dump (bfd *, struct mmo_symbol_trie *); | |
410 | static void mmo_beb128_out (bfd *, int, int); | |
411 | static bfd_boolean mmo_internal_write_section (bfd *, asection *); | |
412 | static void mmo_write_tetra (bfd *, unsigned int); | |
413 | static void mmo_write_tetra_raw (bfd *, unsigned int); | |
414 | static void mmo_write_octa (bfd *, bfd_vma); | |
415 | static void mmo_write_octa_raw (bfd *, bfd_vma); | |
416 | static bfd_boolean mmo_write_chunk (bfd *, const bfd_byte *, unsigned int); | |
417 | static bfd_boolean mmo_flush_chunk (bfd *); | |
418 | static bfd_boolean mmo_write_loc_chunk (bfd *, bfd_vma, const bfd_byte *, | |
419 | unsigned int, bfd_vma *); | |
420 | static bfd_boolean mmo_write_chunk_list (bfd *, mmo_data_list_type *); | |
421 | static bfd_boolean mmo_write_loc_chunk_list (bfd *, mmo_data_list_type *); | |
422 | static bfd_boolean mmo_write_symbols_and_terminator (bfd *); | |
423 | static flagword mmo_sec_flags_from_bfd_flags (flagword); | |
424 | static flagword bfd_sec_flags_from_mmo_flags (flagword); | |
425 | static bfd_byte mmo_get_byte (bfd *); | |
426 | static void mmo_write_byte (bfd *, bfd_byte); | |
427 | static bfd_boolean mmo_new_section_hook (bfd *, asection *); | |
428 | static int mmo_sort_mmo_symbols (const void *, const void *); | |
429 | static bfd_boolean mmo_write_object_contents (bfd *); | |
278b4623 HPN |
430 | static bfd_boolean mmo_write_section_description (bfd *, asection *); |
431 | static bfd_boolean mmo_has_leading_or_trailing_zero_tetra_p (bfd *, | |
432 | asection *); | |
3c3bdf30 NC |
433 | |
434 | /* Global "const" variables initialized once. Must not depend on | |
435 | particular input or caller; put such things into the bfd or elsewhere. | |
436 | Look ma, no static per-invocation data! */ | |
437 | ||
f075ee0c | 438 | static |
3c3bdf30 NC |
439 | char valid_mmo_symbol_character_set[/* A-Z a-z (we assume consecutive |
440 | codes; sorry EBCDIC:ers!). */ | |
441 | + 'Z' - 'A' + 1 + 'z' - 'a' + 1 | |
442 | /* Digits. */ | |
443 | + 10 | |
444 | /* ':' and '_'. */ | |
445 | + 1 + 1 | |
446 | /* Codes higher than 126. */ | |
447 | + 256 - 126 | |
448 | /* Ending zero. */ | |
449 | + 1]; | |
450 | ||
451 | ||
452 | /* Get section SECNAME or create one if it doesn't exist. When creating | |
453 | one, new memory for the name is allocated. */ | |
454 | ||
455 | static asection * | |
278b4623 | 456 | mmo_make_section (bfd *abfd, const char *secname) |
3c3bdf30 NC |
457 | { |
458 | asection *sec = bfd_get_section_by_name (abfd, secname); | |
459 | ||
460 | if (sec == NULL) | |
461 | { | |
462 | char *newsecname = strdup (secname); | |
463 | ||
464 | if (newsecname == NULL) | |
465 | { | |
466 | (*_bfd_error_handler) | |
467 | (_("%s: No core to allocate section name %s\n"), | |
468 | bfd_get_filename (abfd), secname); | |
469 | bfd_set_error (bfd_error_system_call); | |
470 | return NULL; | |
471 | } | |
472 | sec = bfd_make_section (abfd, newsecname); | |
473 | } | |
474 | ||
475 | return sec; | |
476 | } | |
477 | ||
478 | /* Nothing to do, but keep as a placeholder if we need it. | |
479 | Note that state that might differ between bfd:s must not be initialized | |
480 | here, nor must it be static. Add it to tdata information instead. */ | |
481 | ||
482 | static void | |
278b4623 | 483 | mmo_init (void) |
3c3bdf30 | 484 | { |
b34976b6 | 485 | static bfd_boolean inited = FALSE; |
3c3bdf30 NC |
486 | int i = 0; |
487 | int j = 0; | |
488 | static const char letters[] | |
489 | = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789:_"; | |
490 | ||
82e51918 | 491 | if (inited) |
930b4cb2 | 492 | return; |
b34976b6 | 493 | inited = TRUE; |
3c3bdf30 NC |
494 | |
495 | /* Fill in the set of valid symbol characters. */ | |
496 | strcpy (valid_mmo_symbol_character_set, letters); | |
497 | i = strlen (letters); | |
498 | ||
499 | for (j = 126; j < 256; j++) | |
500 | valid_mmo_symbol_character_set[i++] = j; | |
501 | } | |
502 | ||
503 | /* Check whether an existing file is an mmo file. */ | |
504 | ||
3f9c735e | 505 | static const bfd_target * |
278b4623 | 506 | mmo_object_p (bfd *abfd) |
3c3bdf30 NC |
507 | { |
508 | struct stat statbuf; | |
509 | bfd_byte b[4]; | |
510 | ||
511 | mmo_init (); | |
512 | ||
513 | if (bfd_stat (abfd, &statbuf) < 0 | |
514 | || bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 | |
515 | || bfd_bread (b, 4, abfd) != 4) | |
516 | goto bad_final; | |
517 | ||
518 | /* All mmo files are a multiple of four bytes long. | |
519 | Only recognize version one. */ | |
520 | if ((statbuf.st_size % 4) != 0 | |
521 | || b[0] != LOP || b[1] != LOP_PRE || b[2] != 1) | |
522 | goto bad_format; | |
523 | ||
524 | /* Get the last 32-bit word. */ | |
525 | if (bfd_seek (abfd, (file_ptr) statbuf.st_size - 4, SEEK_SET) != 0 | |
526 | || bfd_bread (b, 4, abfd) != 4) | |
527 | goto bad_final; | |
528 | ||
529 | /* Check if the file ends in a lop_end lopcode. */ | |
530 | if (b[0] != LOP || b[1] != LOP_END || ! mmo_mkobject (abfd)) | |
531 | goto bad_format; | |
532 | ||
533 | /* Compute an upper bound on the max symbol length. Not really | |
534 | important as all of the symbol information can only be 256k. */ | |
535 | abfd->tdata.mmo_data->max_symbol_length = (b[2] * 256 + b[3]) * 4; | |
536 | abfd->tdata.mmo_data->lop_stab_symbol | |
537 | = bfd_malloc (abfd->tdata.mmo_data->max_symbol_length + 1); | |
538 | ||
539 | if (abfd->tdata.mmo_data->lop_stab_symbol == NULL) | |
540 | { | |
541 | (*_bfd_error_handler) | |
542 | (_("%s: No core to allocate a symbol %d bytes long\n"), | |
543 | bfd_get_filename (abfd), abfd->tdata.mmo_data->max_symbol_length); | |
544 | goto bad_final; | |
545 | } | |
546 | ||
547 | /* Read in everything. */ | |
548 | if (! mmo_scan (abfd)) | |
549 | goto bad_format_free; | |
550 | ||
551 | if (abfd->symcount > 0) | |
552 | abfd->flags |= HAS_SYMS; | |
553 | ||
554 | /* You'll have to tweak this if you want to use this format for other | |
555 | arches (not recommended due to its small-size limitations). Look at | |
556 | the ELF format for how to make it target-generic. */ | |
557 | if (! bfd_default_set_arch_mach (abfd, bfd_arch_mmix, 0)) | |
558 | goto bad_format_free; | |
559 | ||
560 | return abfd->xvec; | |
561 | ||
562 | bad_format_free: | |
563 | free (abfd->tdata.mmo_data->lop_stab_symbol); | |
564 | bad_format: | |
565 | bfd_set_error (bfd_error_wrong_format); | |
566 | bad_final: | |
567 | return NULL; | |
568 | } | |
569 | ||
570 | /* Set up the mmo tdata information. */ | |
571 | ||
b34976b6 | 572 | static bfd_boolean |
278b4623 | 573 | mmo_mkobject (bfd *abfd) |
3c3bdf30 NC |
574 | { |
575 | mmo_init (); | |
576 | ||
577 | if (abfd->tdata.mmo_data == NULL) | |
578 | { | |
579 | time_t created; | |
580 | ||
581 | /* All fields are zero-initialized, so we don't have to explicitly | |
582 | initialize most. */ | |
583 | tdata_type *tdata = (tdata_type *) bfd_zmalloc (sizeof (tdata_type)); | |
584 | if (tdata == NULL) | |
b34976b6 | 585 | return FALSE; |
3c3bdf30 NC |
586 | |
587 | created = time (NULL); | |
588 | bfd_put_32 (abfd, created, tdata->created); | |
589 | ||
590 | abfd->tdata.mmo_data = tdata; | |
591 | } | |
592 | ||
b34976b6 | 593 | return TRUE; |
3c3bdf30 NC |
594 | } |
595 | ||
c287bfe4 HPN |
596 | static bfd_boolean |
597 | mmo_section_has_contents (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p ATTRIBUTE_UNUSED) | |
598 | { | |
599 | /* The point is to match what --extract-symbols does (well, negated). */ | |
600 | return bfd_get_section_size (sec) != 0; | |
601 | } | |
602 | ||
603 | /* Find out whether we should omit symbol consistency checks for this | |
604 | bfd and cache the value. | |
605 | ||
606 | This function must only be called when all section contents is | |
607 | known. However, calculating symbol consistency at the time the | |
608 | private BFD data is initialized is too late for some uses. */ | |
609 | ||
610 | static bfd_boolean | |
611 | mmo_ignore_symbol_consistency (bfd *abfd) | |
612 | { | |
613 | if (!abfd->tdata.mmo_data->symbol_consistency_override_calculated) | |
614 | { | |
615 | abfd->tdata.mmo_data->ignore_symbol_consistency = | |
616 | bfd_sections_find_if (abfd, mmo_section_has_contents, NULL) == NULL; | |
617 | ||
618 | abfd->tdata.mmo_data->symbol_consistency_override_calculated = TRUE; | |
619 | } | |
620 | ||
621 | return abfd->tdata.mmo_data->ignore_symbol_consistency; | |
622 | } | |
623 | ||
b34976b6 | 624 | static bfd_boolean |
278b4623 | 625 | mmo_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
3c3bdf30 NC |
626 | { |
627 | if (bfd_get_flavour (ibfd) != bfd_target_mmo_flavour | |
628 | || bfd_get_flavour (obfd) != bfd_target_mmo_flavour) | |
b34976b6 | 629 | return TRUE; |
3c3bdf30 NC |
630 | |
631 | /* Copy the time the copied-from file was created. If people want the | |
632 | time the file was last *modified*, they have that in the normal file | |
633 | information. */ | |
634 | memcpy (obfd->tdata.mmo_data->created, ibfd->tdata.mmo_data->created, | |
635 | sizeof (obfd->tdata.mmo_data->created)); | |
b34976b6 | 636 | return TRUE; |
3c3bdf30 NC |
637 | } |
638 | ||
639 | /* Helper functions for mmo_decide_section, used through | |
640 | bfd_map_over_sections. */ | |
641 | ||
642 | static void | |
278b4623 | 643 | mmo_find_sec_w_addr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) |
3c3bdf30 NC |
644 | { |
645 | struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; | |
646 | bfd_vma vma = bfd_get_section_vma (abfd, sec); | |
647 | ||
648 | /* Ignore sections that aren't loaded. */ | |
649 | if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) | |
650 | != (SEC_LOAD | SEC_ALLOC)) | |
651 | return; | |
652 | ||
eea6121a | 653 | if (infop->addr >= vma && infop->addr < vma + sec->size) |
3c3bdf30 NC |
654 | infop->sec = sec; |
655 | } | |
656 | ||
657 | static void | |
278b4623 | 658 | mmo_find_sec_w_addr_grow (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) |
3c3bdf30 NC |
659 | { |
660 | struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; | |
661 | bfd_vma vma = bfd_get_section_vma (abfd, sec); | |
662 | ||
663 | /* Ignore sections that aren't loaded. */ | |
664 | if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) | |
665 | != (SEC_LOAD | SEC_ALLOC)) | |
666 | return; | |
667 | ||
668 | if (infop->addr >= vma && infop->addr < vma + MAX_ARTIFICIAL_SECTION_SIZE) | |
669 | infop->sec = sec; | |
670 | } | |
671 | ||
672 | /* Find a section that corresponds to a VMA. Automatically create .text | |
673 | or .data and set current section to it, depending on what vma. If we | |
674 | can't deduce a section, make one up as ".MMIX.sec.N", where N is an | |
675 | increasing number. */ | |
676 | ||
677 | static asection * | |
278b4623 | 678 | mmo_decide_section (bfd *abfd, bfd_vma vma) |
3c3bdf30 NC |
679 | { |
680 | asection *sec = NULL; | |
681 | char sec_name[sizeof (".MMIX.sec.") + 20]; | |
682 | struct mmo_find_sec_info info; | |
683 | ||
684 | info.addr = vma; | |
685 | info.sec = NULL; | |
686 | ||
687 | /* First see if there's a section that would match exactly. */ | |
688 | bfd_map_over_sections (abfd, mmo_find_sec_w_addr, &info); | |
689 | ||
690 | if (info.sec != NULL) | |
691 | return info.sec; | |
692 | ||
693 | /* If there's no such section, try and expand one of the existing ones, | |
694 | up to a limit. Make sure we have .text and .data before we try that; | |
695 | create them corresponding to expected addresses and set flags to make | |
696 | them match the "loaded and with contents" expectation. */ | |
697 | if ((vma >> 56) == 0) | |
698 | { | |
699 | sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); | |
700 | ||
701 | if (sec == NULL) | |
702 | return NULL; | |
703 | ||
a253d456 NC |
704 | if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) |
705 | return NULL; | |
706 | ||
3c3bdf30 NC |
707 | if (! bfd_set_section_flags (abfd, sec, |
708 | bfd_get_section_flags (abfd, sec) | |
709 | | SEC_CODE | SEC_LOAD | SEC_ALLOC)) | |
710 | return NULL; | |
711 | } | |
712 | else if ((vma >> 56) == 0x20) | |
713 | { | |
714 | sec = bfd_make_section_old_way (abfd, MMO_DATA_SECTION_NAME); | |
715 | ||
716 | if (sec == NULL) | |
717 | return NULL; | |
718 | ||
a253d456 NC |
719 | if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) |
720 | return NULL; | |
721 | ||
3c3bdf30 NC |
722 | if (! bfd_set_section_flags (abfd, sec, |
723 | bfd_get_section_flags (abfd, sec) | |
724 | | SEC_LOAD | SEC_ALLOC)) | |
725 | return NULL; | |
726 | } | |
727 | ||
728 | bfd_map_over_sections (abfd, mmo_find_sec_w_addr_grow, &info); | |
729 | ||
730 | if (info.sec != NULL) | |
731 | return info.sec; | |
732 | ||
733 | /* If there's still no suitable section, make a new one. */ | |
734 | sprintf (sec_name, ".MMIX.sec.%d", abfd->tdata.mmo_data->sec_no++); | |
735 | sec = mmo_make_section (abfd, sec_name); | |
a253d456 NC |
736 | |
737 | if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) | |
738 | return NULL; | |
3c3bdf30 NC |
739 | |
740 | if (! bfd_set_section_flags (abfd, sec, | |
741 | bfd_get_section_flags (abfd, sec) | |
742 | | SEC_LOAD | SEC_ALLOC)) | |
743 | return NULL; | |
744 | return sec; | |
745 | } | |
746 | ||
747 | /* Xor in a 64-bit value VALUE at VMA. */ | |
748 | ||
749 | static INLINE void | |
278b4623 | 750 | mmo_xore_64 (asection *sec, bfd_vma vma, bfd_vma value) |
3c3bdf30 NC |
751 | { |
752 | bfd_byte *loc = mmo_get_loc (sec, vma, 8); | |
753 | bfd_vma prev = bfd_get_64 (sec->owner, loc); | |
754 | ||
755 | value ^= prev; | |
756 | bfd_put_64 (sec->owner, value, loc); | |
757 | } | |
758 | ||
759 | /* Xor in a 32-bit value VALUE at VMA. */ | |
760 | ||
761 | static INLINE void | |
278b4623 | 762 | mmo_xore_32 (asection *sec, bfd_vma vma, unsigned int value) |
3c3bdf30 NC |
763 | { |
764 | bfd_byte *loc = mmo_get_loc (sec, vma, 4); | |
765 | unsigned int prev = bfd_get_32 (sec->owner, loc); | |
766 | ||
767 | value ^= prev; | |
768 | bfd_put_32 (sec->owner, value, loc); | |
769 | } | |
770 | ||
771 | /* Xor in a 16-bit value VALUE at VMA. */ | |
772 | ||
773 | static INLINE void | |
278b4623 | 774 | mmo_xore_16 (asection *sec, bfd_vma vma, unsigned int value) |
3c3bdf30 NC |
775 | { |
776 | bfd_byte *loc = mmo_get_loc (sec, vma, 2); | |
777 | unsigned int prev = bfd_get_16 (sec->owner, loc); | |
778 | ||
779 | value ^= prev; | |
780 | bfd_put_16 (sec->owner, value, loc); | |
781 | } | |
782 | ||
783 | /* Write a 32-bit word to output file, no lop_quote generated. */ | |
784 | ||
785 | static INLINE void | |
278b4623 | 786 | mmo_write_tetra_raw (bfd *abfd, unsigned int value) |
3c3bdf30 NC |
787 | { |
788 | bfd_byte buf[4]; | |
789 | ||
790 | bfd_put_32 (abfd, value, buf); | |
791 | ||
278b4623 | 792 | if (bfd_bwrite (buf, 4, abfd) != 4) |
b34976b6 | 793 | abfd->tdata.mmo_data->have_error = TRUE; |
3c3bdf30 NC |
794 | } |
795 | ||
796 | /* Write a 32-bit word to output file; lop_quote if necessary. */ | |
797 | ||
798 | static INLINE void | |
278b4623 | 799 | mmo_write_tetra (bfd *abfd, unsigned int value) |
3c3bdf30 NC |
800 | { |
801 | if (((value >> 24) & 0xff) == LOP) | |
802 | mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); | |
803 | ||
804 | mmo_write_tetra_raw (abfd, value); | |
805 | } | |
806 | ||
807 | /* Write a 64-bit word to output file, perhaps with lop_quoting. */ | |
808 | ||
809 | static INLINE void | |
278b4623 | 810 | mmo_write_octa (bfd *abfd, bfd_vma value) |
3c3bdf30 NC |
811 | { |
812 | mmo_write_tetra (abfd, (unsigned int) (value >> 32)); | |
813 | mmo_write_tetra (abfd, (unsigned int) value); | |
814 | } | |
815 | ||
816 | /* Write a 64-bit word to output file, without lop_quoting. */ | |
817 | ||
818 | static INLINE void | |
278b4623 | 819 | mmo_write_octa_raw (bfd *abfd, bfd_vma value) |
3c3bdf30 NC |
820 | { |
821 | mmo_write_tetra_raw (abfd, (unsigned int) (value >> 32)); | |
822 | mmo_write_tetra_raw (abfd, (unsigned int) value); | |
823 | } | |
824 | ||
dfa36a69 HPN |
825 | /* Write quoted contents. Intended to be called multiple times in |
826 | sequence, followed by a call to mmo_flush_chunk. */ | |
3c3bdf30 | 827 | |
b34976b6 | 828 | static INLINE bfd_boolean |
278b4623 | 829 | mmo_write_chunk (bfd *abfd, const bfd_byte *loc, unsigned int len) |
3c3bdf30 | 830 | { |
b34976b6 | 831 | bfd_boolean retval = TRUE; |
ed905580 | 832 | struct mmo_data_struct *mmop = abfd->tdata.mmo_data; |
dfa36a69 HPN |
833 | |
834 | /* Fill up a tetra from bytes remaining from a previous chunk. */ | |
ed905580 | 835 | if (mmop->byte_no != 0) |
dfa36a69 | 836 | { |
ed905580 | 837 | while (mmop->byte_no < 4 && len != 0) |
dfa36a69 | 838 | { |
ed905580 | 839 | mmop->buf[mmop->byte_no++] = *loc++; |
dfa36a69 HPN |
840 | len--; |
841 | } | |
842 | ||
ed905580 | 843 | if (mmop->byte_no == 4) |
dfa36a69 | 844 | { |
ed905580 HPN |
845 | mmo_write_tetra (abfd, bfd_get_32 (abfd, mmop->buf)); |
846 | mmop->byte_no = 0; | |
dfa36a69 HPN |
847 | } |
848 | } | |
3c3bdf30 NC |
849 | |
850 | while (len >= 4) | |
851 | { | |
852 | if (loc[0] == LOP) | |
853 | mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); | |
854 | ||
82e51918 | 855 | retval = (retval |
ed905580 | 856 | && ! mmop->have_error |
278b4623 | 857 | && 4 == bfd_bwrite (loc, 4, abfd)); |
3c3bdf30 NC |
858 | |
859 | loc += 4; | |
860 | len -= 4; | |
861 | } | |
862 | ||
863 | if (len) | |
864 | { | |
1218d67d HPN |
865 | /* We must have flushed a previous remainder if we get one from |
866 | this chunk too. */ | |
867 | BFD_ASSERT (mmop->byte_no == 0); | |
ed905580 HPN |
868 | memcpy (mmop->buf, loc, len); |
869 | mmop->byte_no = len; | |
3c3bdf30 NC |
870 | } |
871 | ||
82e51918 | 872 | if (! retval) |
ed905580 | 873 | mmop->have_error = TRUE; |
3c3bdf30 NC |
874 | return retval; |
875 | } | |
876 | ||
dfa36a69 HPN |
877 | /* Flush remaining bytes, from a previous mmo_write_chunk, zero-padded to |
878 | 4 bytes. */ | |
879 | ||
b34976b6 | 880 | static INLINE bfd_boolean |
278b4623 | 881 | mmo_flush_chunk (bfd *abfd) |
dfa36a69 HPN |
882 | { |
883 | if (abfd->tdata.mmo_data->byte_no != 0) | |
884 | { | |
885 | memset (abfd->tdata.mmo_data->buf + abfd->tdata.mmo_data->byte_no, | |
886 | 0, 4 - abfd->tdata.mmo_data->byte_no); | |
887 | mmo_write_tetra (abfd, | |
888 | bfd_get_32 (abfd, abfd->tdata.mmo_data->buf)); | |
889 | abfd->tdata.mmo_data->byte_no = 0; | |
890 | } | |
891 | ||
82e51918 | 892 | return ! abfd->tdata.mmo_data->have_error; |
dfa36a69 HPN |
893 | } |
894 | ||
3c3bdf30 NC |
895 | /* Same, but from a list. */ |
896 | ||
b34976b6 | 897 | static INLINE bfd_boolean |
278b4623 | 898 | mmo_write_chunk_list (bfd *abfd, mmo_data_list_type *datap) |
3c3bdf30 NC |
899 | { |
900 | for (; datap != NULL; datap = datap->next) | |
901 | if (! mmo_write_chunk (abfd, datap->data, datap->size)) | |
b34976b6 | 902 | return FALSE; |
3c3bdf30 | 903 | |
dfa36a69 | 904 | return mmo_flush_chunk (abfd); |
3c3bdf30 NC |
905 | } |
906 | ||
dfa36a69 HPN |
907 | /* Write a lop_loc and some contents. A caller needs to call |
908 | mmo_flush_chunk after calling this function. The location is only | |
909 | output if different than *LAST_VMAP, which is updated after this call. */ | |
3c3bdf30 | 910 | |
b34976b6 | 911 | static bfd_boolean |
278b4623 HPN |
912 | mmo_write_loc_chunk (bfd *abfd, bfd_vma vma, const bfd_byte *loc, |
913 | unsigned int len, bfd_vma *last_vmap) | |
3c3bdf30 | 914 | { |
1218d67d HPN |
915 | /* Find an initial and trailing section of zero (aligned) tetras; we don't |
916 | need to write out zeros. FIXME: When we do this, we should emit | |
917 | section size and address specifiers, else objcopy can't always perform | |
918 | an identity translation. Only do this if we *don't* have left-over | |
919 | data from a previous write (and will not add any) or else the vma of | |
920 | this chunk is *not* the next address, because then data isn't | |
921 | tetrabyte-aligned and we're concatenating to that left-over data. */ | |
922 | ||
923 | if ((vma & 3) == 0 | |
924 | && (abfd->tdata.mmo_data->byte_no == 0 || vma != *last_vmap)) | |
3c3bdf30 | 925 | { |
1218d67d | 926 | while (len > 4 && bfd_get_32 (abfd, loc) == 0) |
8d28f606 HPN |
927 | { |
928 | vma += 4; | |
929 | len -= 4; | |
930 | loc += 4; | |
931 | } | |
3c3bdf30 | 932 | |
1218d67d HPN |
933 | if ((len & 3) == 0) |
934 | while (len > 4 && bfd_get_32 (abfd, loc + len - 4) == 0) | |
935 | len -= 4; | |
8d28f606 | 936 | } |
3c3bdf30 | 937 | |
dfa36a69 HPN |
938 | /* Only write out the location if it's different than the one the caller |
939 | (supposedly) previously handled, accounting for omitted leading zeros. */ | |
940 | if (vma != *last_vmap) | |
941 | { | |
942 | /* We might be in the middle of a sequence. */ | |
943 | mmo_flush_chunk (abfd); | |
944 | ||
1218d67d HPN |
945 | /* This should not happen during normal usage, but can presumably |
946 | happen with an erroneous linker-script, so handle gracefully. | |
947 | Avoid Knuth-specific terms in the message, such as "tetrabyte". | |
948 | Note that this function will get non-4-multiple lengths and | |
949 | unaligned vmas but those come in tuples (mostly pairs) and are | |
950 | continuous (i.e. the if-condition above false) and they are | |
951 | group-wise aligned. */ | |
952 | if ((vma & 3) != 0) | |
953 | { | |
954 | (*_bfd_error_handler) | |
955 | (_("%s: attempt to emit contents at non-multiple-of-4 address 0x%lx\n"), | |
956 | bfd_get_filename (abfd), (unsigned long) vma); | |
957 | bfd_set_error (bfd_error_bad_value); | |
958 | return FALSE; | |
959 | } | |
960 | ||
dfa36a69 HPN |
961 | /* We always write the location as 64 bits; no use saving bytes |
962 | here. */ | |
963 | mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_LOC << 16) | 2); | |
964 | mmo_write_octa_raw (abfd, vma); | |
965 | } | |
966 | ||
967 | /* Update to reflect end of this chunk, with trailing zeros omitted. */ | |
968 | *last_vmap = vma + len; | |
969 | ||
82e51918 AM |
970 | return (! abfd->tdata.mmo_data->have_error |
971 | && mmo_write_chunk (abfd, loc, len)); | |
3c3bdf30 NC |
972 | } |
973 | ||
974 | /* Same, but from a list. */ | |
975 | ||
b34976b6 | 976 | static INLINE bfd_boolean |
278b4623 | 977 | mmo_write_loc_chunk_list (bfd *abfd, mmo_data_list_type *datap) |
3c3bdf30 | 978 | { |
dfa36a69 HPN |
979 | /* Get an address different than the address of the first chunk. */ |
980 | bfd_vma last_vma = datap ? datap->where - 1 : 0; | |
981 | ||
3c3bdf30 | 982 | for (; datap != NULL; datap = datap->next) |
dfa36a69 HPN |
983 | if (! mmo_write_loc_chunk (abfd, datap->where, datap->data, datap->size, |
984 | &last_vma)) | |
b34976b6 | 985 | return FALSE; |
3c3bdf30 | 986 | |
dfa36a69 | 987 | return mmo_flush_chunk (abfd); |
3c3bdf30 NC |
988 | } |
989 | ||
990 | /* Make a .MMIX.spec_data.N section. */ | |
991 | ||
992 | static asection * | |
278b4623 | 993 | mmo_get_generic_spec_data_section (bfd *abfd, int spec_data_number) |
3c3bdf30 NC |
994 | { |
995 | asection *sec; | |
996 | char secname[sizeof (MMIX_OTHER_SPEC_SECTION_PREFIX) + 20] | |
997 | = MMIX_OTHER_SPEC_SECTION_PREFIX; | |
998 | ||
999 | sprintf (secname + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX), | |
1000 | "%d", spec_data_number); | |
1001 | ||
1002 | sec = mmo_make_section (abfd, secname); | |
1003 | ||
1004 | return sec; | |
1005 | } | |
1006 | ||
1007 | /* Make a special section for SPEC_DATA_NUMBER. If it is the one we use | |
1008 | ourselves, parse some of its data to get at the section name. */ | |
1009 | ||
1010 | static asection * | |
278b4623 | 1011 | mmo_get_spec_section (bfd *abfd, int spec_data_number) |
3c3bdf30 | 1012 | { |
f075ee0c | 1013 | char *secname; |
3c3bdf30 NC |
1014 | asection *sec; |
1015 | bfd_byte buf[4]; | |
1016 | unsigned int secname_length; | |
1017 | unsigned int i; | |
1018 | bfd_vma section_length; | |
1019 | bfd_vma section_vma; | |
1020 | mmo_data_list_type *loc; | |
1021 | flagword flags; | |
1022 | long orig_pos; | |
1023 | ||
1024 | /* If this isn't the "special" special data, then make a placeholder | |
1025 | section. */ | |
1026 | if (spec_data_number != SPEC_DATA_SECTION) | |
1027 | return mmo_get_generic_spec_data_section (abfd, spec_data_number); | |
1028 | ||
1029 | /* Seek back to this position if there was a format error. */ | |
1030 | orig_pos = bfd_tell (abfd); | |
1031 | ||
1032 | /* Read the length (in 32-bit words). */ | |
1033 | if (bfd_bread (buf, 4, abfd) != 4) | |
1034 | goto format_error; | |
1035 | ||
1036 | if (buf[0] == LOP) | |
1037 | { | |
1038 | if (buf[1] != LOP_QUOTE) | |
1039 | goto format_error; | |
1040 | ||
1041 | if (bfd_bread (buf, 4, abfd) != 4) | |
1042 | goto format_error; | |
1043 | } | |
1044 | ||
1045 | /* We don't care to keep the name length accurate. It's | |
1046 | zero-terminated. */ | |
1047 | secname_length = bfd_get_32 (abfd, buf) * 4; | |
1048 | ||
1049 | /* Check section name length for sanity. */ | |
1050 | if (secname_length > MAX_SECTION_NAME_SIZE) | |
1051 | goto format_error; | |
1052 | ||
1053 | /* This should be free'd regardless if a section is created. */ | |
1054 | secname = bfd_malloc (secname_length + 1); | |
1055 | secname[secname_length] = 0; | |
1056 | ||
1057 | for (i = 0; i < secname_length / 4; i++) | |
1058 | { | |
1059 | if (bfd_bread (secname + i * 4, 4, abfd) != 4) | |
1060 | goto format_error_free; | |
1061 | ||
f075ee0c | 1062 | if (secname[i * 4] == (char) LOP) |
3c3bdf30 NC |
1063 | { |
1064 | /* A bit of overkill, but we handle char 0x98 in a section name, | |
1065 | and recognize misparsing. */ | |
1066 | if (secname[i * 4 + 1] != LOP_QUOTE | |
1067 | || bfd_bread (secname + i * 4, 4, abfd) != 4) | |
1068 | /* Whoops. We thought this was a name, and now we found a | |
1069 | non-lop_quote lopcode before we parsed the whole length of | |
1070 | the name. Signal end-of-file in the same manner. */ | |
1071 | goto format_error_free; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | /* Get the section flags. */ | |
1076 | if (bfd_bread (buf, 4, abfd) != 4 | |
1077 | || (buf[0] == LOP | |
1078 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1079 | goto format_error_free; | |
1080 | ||
1081 | flags = bfd_get_32 (abfd, buf); | |
1082 | ||
1083 | /* Get the section length. */ | |
1084 | if (bfd_bread (buf, 4, abfd) != 4 | |
1085 | || (buf[0] == LOP | |
1086 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1087 | goto format_error_free; | |
1088 | ||
1089 | section_length = (bfd_vma) bfd_get_32 (abfd, buf) << 32; | |
1090 | ||
1091 | /* That's the first, high-part. Now get the low part. */ | |
1092 | ||
1093 | if (bfd_bread (buf, 4, abfd) != 4 | |
1094 | || (buf[0] == LOP | |
1095 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1096 | goto format_error_free; | |
1097 | ||
1098 | section_length |= (bfd_vma) bfd_get_32 (abfd, buf); | |
1099 | ||
1100 | /* Check the section length for sanity. */ | |
1101 | if (section_length > MAX_ARTIFICIAL_SECTION_SIZE) | |
1102 | goto format_error_free; | |
1103 | ||
1104 | /* Get the section VMA. */ | |
1105 | if (bfd_bread (buf, 4, abfd) != 4 | |
1106 | || (buf[0] == LOP | |
1107 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1108 | goto format_error_free; | |
1109 | ||
1110 | section_vma = (bfd_vma) bfd_get_32 (abfd, buf) << 32; | |
1111 | ||
1112 | /* That's the first, high-part. Now get the low part. */ | |
1113 | if (bfd_bread (buf, 4, abfd) != 4 | |
1114 | || (buf[0] == LOP | |
1115 | && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) | |
1116 | goto format_error_free; | |
1117 | ||
1118 | section_vma |= (bfd_vma) bfd_get_32 (abfd, buf); | |
1119 | ||
1120 | sec = mmo_make_section (abfd, secname); | |
1121 | free (secname); | |
1122 | if (sec == NULL) | |
1123 | goto format_error; | |
1124 | ||
1125 | /* We allocate a buffer here for the advertised size, with head room for | |
1126 | tetrabyte alignment. */ | |
1127 | loc = bfd_zmalloc (section_length + 3 | |
1128 | + sizeof (struct mmo_data_list_struct)); | |
1129 | if (loc == NULL) | |
1130 | goto format_error; | |
1131 | ||
1132 | /* Use a TETRA-rounded size for the allocated buffer; we set the | |
1133 | "visible" section size below. */ | |
1134 | loc->size = (section_length + 3) & ~3; | |
1135 | ||
1136 | /* Add in the section flags we found to those bfd entered during this | |
1137 | process and set the contents. */ | |
1138 | if (! bfd_set_section_flags (abfd, sec, | |
1139 | bfd_sec_flags_from_mmo_flags (flags) | |
1140 | | bfd_get_section_flags (abfd, sec) | |
1141 | | (section_length != 0 ? SEC_HAS_CONTENTS : 0)) | |
eea6121a | 1142 | || ! bfd_set_section_size (abfd, sec, sec->size + section_length) |
3c3bdf30 NC |
1143 | /* Set VMA only for the first occurrence. */ |
1144 | || (! sec->user_set_vma | |
1145 | && ! bfd_set_section_vma (abfd, sec, section_vma))) | |
1146 | { | |
1147 | /* If we get an error for any of the calls above, signal more than | |
1148 | just a format error for the spec section. */ | |
1149 | return NULL; | |
1150 | } | |
1151 | ||
1152 | loc->next = NULL; | |
68bfbfcc AM |
1153 | if (mmo_section_data (sec)->tail != NULL) |
1154 | mmo_section_data (sec)->tail->next = loc; | |
3c3bdf30 | 1155 | else |
68bfbfcc AM |
1156 | mmo_section_data (sec)->head = loc; |
1157 | mmo_section_data (sec)->tail = loc; | |
3c3bdf30 NC |
1158 | loc->where = section_vma; |
1159 | ||
1160 | return sec; | |
1161 | ||
1162 | format_error_free: | |
1163 | free (secname); | |
1164 | format_error: | |
1165 | if (bfd_seek (abfd, orig_pos, SEEK_SET) != 0) | |
1166 | return NULL; | |
1167 | ||
1168 | return mmo_get_generic_spec_data_section (abfd, spec_data_number); | |
1169 | } | |
1170 | ||
1171 | /* Read a byte, but read from file in multiples of 32-bit words. */ | |
1172 | ||
1173 | static bfd_byte | |
278b4623 | 1174 | mmo_get_byte (bfd *abfd) |
3c3bdf30 NC |
1175 | { |
1176 | bfd_byte retval; | |
1177 | ||
1178 | if (abfd->tdata.mmo_data->byte_no == 0) | |
1179 | { | |
82e51918 | 1180 | if (! abfd->tdata.mmo_data->have_error |
3c3bdf30 NC |
1181 | && bfd_bread (abfd->tdata.mmo_data->buf, 4, abfd) != 4) |
1182 | { | |
b34976b6 | 1183 | abfd->tdata.mmo_data->have_error = TRUE; |
3c3bdf30 NC |
1184 | |
1185 | /* A value somewhat safe against tripping on some inconsistency | |
1186 | when mopping up after this error. */ | |
1187 | return 128; | |
1188 | } | |
1189 | } | |
1190 | ||
1191 | retval = abfd->tdata.mmo_data->buf[abfd->tdata.mmo_data->byte_no]; | |
1192 | abfd->tdata.mmo_data->byte_no = (abfd->tdata.mmo_data->byte_no + 1) % 4; | |
1193 | ||
1194 | return retval; | |
1195 | } | |
1196 | ||
1197 | /* Write a byte, in multiples of 32-bit words. */ | |
1198 | ||
1199 | static void | |
278b4623 | 1200 | mmo_write_byte (bfd *abfd, bfd_byte value) |
3c3bdf30 NC |
1201 | { |
1202 | abfd->tdata.mmo_data->buf[(abfd->tdata.mmo_data->byte_no++ % 4)] = value; | |
1203 | if ((abfd->tdata.mmo_data->byte_no % 4) == 0) | |
1204 | { | |
82e51918 | 1205 | if (! abfd->tdata.mmo_data->have_error |
3c3bdf30 | 1206 | && bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) |
b34976b6 | 1207 | abfd->tdata.mmo_data->have_error = TRUE; |
3c3bdf30 NC |
1208 | } |
1209 | } | |
1210 | ||
1211 | /* Create a symbol. */ | |
1212 | ||
b34976b6 | 1213 | static bfd_boolean |
278b4623 HPN |
1214 | mmo_create_symbol (bfd *abfd, const char *symname, bfd_vma addr, enum |
1215 | mmo_sym_type sym_type, unsigned int serno) | |
3c3bdf30 NC |
1216 | { |
1217 | struct mmo_symbol *n; | |
1218 | ||
1219 | n = (struct mmo_symbol *) bfd_alloc (abfd, sizeof (struct mmo_symbol)); | |
1220 | if (n == NULL) | |
b34976b6 | 1221 | return FALSE; |
3c3bdf30 NC |
1222 | |
1223 | n->name = bfd_alloc (abfd, strlen (symname) + 1); | |
1224 | if (n->name == NULL) | |
b34976b6 | 1225 | return FALSE; |
3c3bdf30 | 1226 | |
278b4623 | 1227 | strcpy (n->name, symname); |
3c3bdf30 NC |
1228 | |
1229 | n->value = addr; | |
1230 | n->sym_type = sym_type; | |
1231 | n->serno = serno; | |
1232 | ||
1233 | if (abfd->tdata.mmo_data->symbols == NULL) | |
1234 | abfd->tdata.mmo_data->symbols = n; | |
1235 | else | |
1236 | abfd->tdata.mmo_data->symtail->next = n; | |
1237 | abfd->tdata.mmo_data->symtail = n; | |
1238 | n->next = NULL; | |
1239 | ||
1240 | ++abfd->symcount; | |
1241 | ||
1242 | /* Check that :Main equals the last octa of the .MMIX.reg_contents | |
1243 | section, as it's the one place we're sure to pass when reading a mmo | |
1244 | object. For written objects, we do it while setting the symbol | |
1245 | table. */ | |
1246 | if (strcmp (symname, MMIX_START_SYMBOL_NAME) == 0 | |
c287bfe4 HPN |
1247 | && bfd_get_start_address (abfd) != addr |
1248 | && !mmo_ignore_symbol_consistency (abfd)) | |
3c3bdf30 NC |
1249 | { |
1250 | (*_bfd_error_handler) | |
1251 | (_("%s: invalid mmo file: initialization value for $255 is not `Main'\n"), | |
1252 | bfd_get_filename (abfd)); | |
1253 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1254 | return FALSE; |
3c3bdf30 NC |
1255 | } |
1256 | ||
b34976b6 | 1257 | return TRUE; |
3c3bdf30 NC |
1258 | } |
1259 | ||
1260 | /* Read in symbols. */ | |
1261 | ||
b34976b6 | 1262 | static bfd_boolean |
278b4623 | 1263 | mmo_get_symbols (bfd *abfd) |
3c3bdf30 NC |
1264 | { |
1265 | /* | |
1266 | INODE | |
1267 | Symbol-table, mmo section mapping, File layout, mmo | |
1268 | SUBSECTION | |
1269 | Symbol table format | |
1270 | ||
52f4ea79 HPN |
1271 | From mmixal.w (or really, the generated mmixal.tex) in the |
1272 | MMIXware package which also contains the @command{mmix} simulator: | |
3c3bdf30 NC |
1273 | ``Symbols are stored and retrieved by means of a @samp{ternary |
1274 | search trie}, following ideas of Bentley and Sedgewick. (See | |
1275 | ACM--SIAM Symp.@: on Discrete Algorithms @samp{8} (1997), 360--369; | |
1276 | R.@:Sedgewick, @samp{Algorithms in C} (Reading, Mass.@: | |
1277 | Addison--Wesley, 1998), @samp{15.4}.) Each trie node stores a | |
1278 | character, and there are branches to subtries for the cases where | |
1279 | a given character is less than, equal to, or greater than the | |
1280 | character in the trie. There also is a pointer to a symbol table | |
1281 | entry if a symbol ends at the current node.'' | |
1282 | ||
1283 | So it's a tree encoded as a stream of bytes. The stream of bytes | |
1284 | acts on a single virtual global symbol, adding and removing | |
1285 | characters and signalling complete symbol points. Here, we read | |
1286 | the stream and create symbols at the completion points. | |
1287 | ||
1288 | First, there's a control byte <<m>>. If any of the listed bits | |
1289 | in <<m>> is nonzero, we execute what stands at the right, in | |
1290 | the listed order: | |
1291 | ||
1292 | | (MMO3_LEFT) | |
1293 | | 0x40 - Traverse left trie. | |
1294 | | (Read a new command byte and recurse.) | |
1295 | | | |
1296 | | (MMO3_SYMBITS) | |
1297 | | 0x2f - Read the next byte as a character and store it in the | |
1298 | | current character position; increment character position. | |
1299 | | Test the bits of <<m>>: | |
1300 | | | |
1301 | | (MMO3_WCHAR) | |
1302 | | 0x80 - The character is 16-bit (so read another byte, | |
1303 | | merge into current character. | |
1304 | | | |
1305 | | (MMO3_TYPEBITS) | |
1306 | | 0xf - We have a complete symbol; parse the type, value | |
1307 | | and serial number and do what should be done | |
1308 | | with a symbol. The type and length information | |
1309 | | is in j = (m & 0xf). | |
1310 | | | |
1311 | | (MMO3_REGQUAL_BITS) | |
1312 | | j == 0xf: A register variable. The following | |
1313 | | byte tells which register. | |
1314 | | j <= 8: An absolute symbol. Read j bytes as the | |
1315 | | big-endian number the symbol equals. | |
1316 | | A j = 2 with two zero bytes denotes an | |
1317 | | unknown symbol. | |
1318 | | j > 8: As with j <= 8, but add (0x20 << 56) | |
1319 | | to the value in the following j - 8 | |
1320 | | bytes. | |
1321 | | | |
1322 | | Then comes the serial number, as a variant of | |
1323 | | uleb128, but better named ubeb128: | |
1324 | | Read bytes and shift the previous value left 7 | |
1325 | | (multiply by 128). Add in the new byte, repeat | |
1326 | | until a byte has bit 7 set. The serial number | |
1327 | | is the computed value minus 128. | |
1328 | | | |
1329 | | (MMO3_MIDDLE) | |
1330 | | 0x20 - Traverse middle trie. (Read a new command byte | |
1331 | | and recurse.) Decrement character position. | |
1332 | | | |
1333 | | (MMO3_RIGHT) | |
1334 | | 0x10 - Traverse right trie. (Read a new command byte and | |
1335 | | recurse.) | |
1336 | ||
1337 | Let's look again at the <<lop_stab>> for the trivial file | |
1338 | (@pxref{File layout}). | |
1339 | ||
1340 | | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. | |
1341 | | 0x203a4040 | |
1342 | | 0x10404020 | |
1343 | | 0x4d206120 | |
1344 | | 0x69016e00 | |
1345 | | 0x81000000 | |
1346 | ||
1347 | This forms the trivial trie (note that the path between ``:'' and | |
1348 | ``M'' is redundant): | |
1349 | ||
1350 | | 203a ":" | |
1351 | | 40 / | |
1352 | | 40 / | |
1353 | | 10 \ | |
1354 | | 40 / | |
1355 | | 40 / | |
1356 | | 204d "M" | |
1357 | | 2061 "a" | |
1358 | | 2069 "i" | |
1359 | | 016e "n" is the last character in a full symbol, and | |
1360 | | with a value represented in one byte. | |
1361 | | 00 The value is 0. | |
1362 | | 81 The serial number is 1. */ | |
1363 | ||
1364 | bfd_byte m = mmo_get_byte (abfd); | |
1365 | ||
1366 | /* Check first if we have a bad hair day. */ | |
82e51918 | 1367 | if (abfd->tdata.mmo_data->have_error) |
b34976b6 | 1368 | return FALSE; |
3c3bdf30 NC |
1369 | |
1370 | if (m & MMO3_LEFT) | |
1371 | /* Traverse left trie. */ | |
1372 | mmo_get_symbols (abfd); | |
1373 | ||
1374 | if (m & MMO3_SYMBITS) | |
1375 | { | |
1376 | bfd_byte c = mmo_get_byte (abfd); | |
1377 | bfd_byte j = m & MMO3_TYPEBITS; | |
1378 | bfd_vma addr = 0; | |
1379 | enum mmo_sym_type sym_type; | |
1380 | unsigned int serno = 0; | |
1381 | bfd_byte k; | |
1382 | ||
1383 | if (m & MMO3_WCHAR) | |
1384 | { | |
1385 | bfd_byte c2 = mmo_get_byte (abfd); | |
1386 | ||
1387 | /* A two-byte character. We can't grok this, but neither can | |
1388 | mmotype, for other cases than the second byte being zero. */ | |
1389 | ||
1390 | if (c != 0) | |
1391 | { | |
1392 | abfd->tdata.mmo_data->lop_stab_symbol | |
1393 | [abfd->tdata.mmo_data->symbol_position] = 0; | |
1394 | ||
1395 | (*_bfd_error_handler) | |
278b4623 HPN |
1396 | (_("%s: unsupported wide character sequence" |
1397 | " 0x%02X 0x%02X after symbol name starting with `%s'\n"), | |
3c3bdf30 NC |
1398 | bfd_get_filename (abfd), c, c2, |
1399 | abfd->tdata.mmo_data->lop_stab_symbol); | |
1400 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 AM |
1401 | abfd->tdata.mmo_data->have_error = TRUE; |
1402 | return FALSE; | |
3c3bdf30 NC |
1403 | } |
1404 | else | |
1405 | c = c2; | |
1406 | } | |
1407 | ||
1408 | abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position++] = c; | |
1409 | abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position] = 0; | |
1410 | ||
1411 | if (j & MMO3_REGQUAL_BITS) | |
1412 | { | |
1413 | if (j == MMO3_REGQUAL_BITS) | |
1414 | { | |
1415 | sym_type = mmo_reg_sym; | |
1416 | addr = mmo_get_byte (abfd); | |
1417 | } | |
1418 | else if (j <= 8) | |
1419 | { | |
1420 | unsigned int i; | |
1421 | ||
1422 | for (i = 0; i < j; i++) | |
1423 | addr = (addr << 8) + mmo_get_byte (abfd); | |
1424 | ||
1425 | if (addr == 0 && j == MMO3_UNDEF) | |
1426 | sym_type = mmo_undef_sym; | |
1427 | else | |
1428 | sym_type = mmo_abs_sym; | |
1429 | } | |
1430 | else | |
1431 | { | |
1432 | unsigned int i; | |
1433 | ||
1434 | for (i = MMO3_DATA; i < j; i++) | |
1435 | addr = (addr << 8) + mmo_get_byte (abfd); | |
1436 | ||
1437 | addr += (bfd_vma) 0x20 << 56; | |
1438 | sym_type = mmo_data_sym; | |
1439 | } | |
1440 | ||
1441 | /* Get the serial number. */ | |
1442 | do | |
1443 | { | |
1444 | k = mmo_get_byte (abfd); | |
1445 | serno = (serno << 7) + k; | |
1446 | } | |
1447 | while (k < 128); | |
1448 | serno -= 128; | |
1449 | ||
1450 | /* Got it. Now enter it. Skip a leading ":". */ | |
82e51918 | 1451 | if (! abfd->tdata.mmo_data->have_error |
3c3bdf30 NC |
1452 | && ! mmo_create_symbol (abfd, |
1453 | abfd->tdata.mmo_data->lop_stab_symbol | |
1454 | + 1, | |
1455 | addr, sym_type, serno)) | |
b34976b6 | 1456 | abfd->tdata.mmo_data->have_error = TRUE; |
3c3bdf30 NC |
1457 | } |
1458 | ||
1459 | if (m & MMO3_MIDDLE) | |
1460 | /* Traverse middle trie. */ | |
1461 | mmo_get_symbols (abfd); | |
1462 | ||
1463 | abfd->tdata.mmo_data->symbol_position--; | |
1464 | } | |
1465 | ||
1466 | if (m & MMO3_RIGHT) | |
1467 | /* Traverse right trie. */ | |
1468 | mmo_get_symbols (abfd); | |
1469 | ||
82e51918 | 1470 | return ! abfd->tdata.mmo_data->have_error; |
3c3bdf30 NC |
1471 | } |
1472 | ||
1473 | /* Get the location of memory area [VMA..VMA + SIZE - 1], which we think | |
1474 | is in section SEC. Adjust and reallocate zero-initialized contents. | |
1475 | If there's new contents, allocate to the next multiple of | |
1476 | MMO_SEC_CONTENTS_CHUNK_SIZE. */ | |
1477 | ||
1478 | static INLINE bfd_byte * | |
278b4623 | 1479 | mmo_get_loc (asection *sec, bfd_vma vma, int size) |
3c3bdf30 NC |
1480 | { |
1481 | bfd_size_type allocated_size; | |
68bfbfcc | 1482 | struct mmo_section_data_struct *sdatap = mmo_section_data (sec); |
3c3bdf30 NC |
1483 | struct mmo_data_list_struct *datap = sdatap->head; |
1484 | struct mmo_data_list_struct *entry; | |
1485 | ||
dfa36a69 HPN |
1486 | /* First search the list to see if we have the requested chunk in one |
1487 | piece, or perhaps if we have a suitable chunk with room to fit. */ | |
3c3bdf30 NC |
1488 | for (; datap != NULL; datap = datap->next) |
1489 | { | |
1490 | if (datap->where <= vma | |
1491 | && datap->where + datap->size >= vma + size) | |
1492 | return datap->data + vma - datap->where; | |
1493 | else if (datap->where <= vma | |
1494 | && datap->where + datap->allocated_size >= vma + size | |
1495 | /* Only munch on the "allocated size" if it does not | |
1496 | overlap the next chunk. */ | |
1497 | && (datap->next == NULL || datap->next->where >= vma + size)) | |
1498 | { | |
1499 | /* There was room allocated, but the size wasn't set to include | |
1500 | it. Do that now. */ | |
1501 | datap->size += (vma + size) - (datap->where + datap->size); | |
1502 | ||
dfa36a69 HPN |
1503 | /* Update the section size. This happens only if we update the |
1504 | 32-bit-aligned chunk size. Callers that have | |
1505 | non-32-bit-aligned sections should do all allocation and | |
1506 | size-setting by themselves or at least set the section size | |
1507 | after the last allocating call to this function. */ | |
eea6121a AM |
1508 | if (vma + size > sec->vma + sec->size) |
1509 | sec->size += (vma + size) - (sec->vma + sec->size); | |
3c3bdf30 NC |
1510 | |
1511 | return datap->data + vma - datap->where; | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | /* Not found; allocate a new block. First check in case we get a | |
1516 | request for a size split up over several blocks; we'll have to return | |
1517 | NULL for those cases, requesting the caller to split up the request. | |
1518 | Requests with an address aligned on MMO_SEC_CONTENTS_CHUNK_SIZE bytes and | |
1519 | for no more than MMO_SEC_CONTENTS_CHUNK_SIZE will always get resolved. */ | |
1520 | ||
1521 | for (datap = sdatap->head; datap != NULL; datap = datap->next) | |
1522 | if ((datap->where <= vma && datap->where + datap->size > vma) | |
1523 | || (datap->where < vma + size | |
1524 | && datap->where + datap->size >= vma + size)) | |
1525 | return NULL; | |
1526 | ||
1527 | allocated_size | |
1528 | = (size + MMO_SEC_CONTENTS_CHUNK_SIZE - 1) & ~(MMO_SEC_CONTENTS_CHUNK_SIZE - 1); | |
1529 | entry = (mmo_data_list_type *) | |
1530 | bfd_zalloc (sec->owner, sizeof (mmo_data_list_type) + allocated_size); | |
1531 | if (entry == NULL) | |
c295a511 | 1532 | return NULL; |
3c3bdf30 NC |
1533 | entry->where = vma; |
1534 | entry->size = size; | |
1535 | entry->allocated_size = allocated_size; | |
1536 | ||
1537 | datap = sdatap->head; | |
1538 | ||
1539 | /* Sort the records by address. Optimize for the common case of adding | |
1540 | a record to the end of the list. */ | |
1541 | if (sdatap->tail != NULL && entry->where >= sdatap->tail->where) | |
1542 | { | |
1543 | sdatap->tail->next = entry; | |
1544 | entry->next = NULL; | |
1545 | sdatap->tail = entry; | |
1546 | } | |
1547 | else | |
1548 | { | |
1549 | mmo_data_list_type **look; | |
1550 | for (look = &sdatap->head; | |
1551 | *look != NULL && (*look)->where < entry->where; | |
1552 | look = &(*look)->next) | |
1553 | ; | |
1554 | entry->next = *look; | |
1555 | *look = entry; | |
1556 | if (entry->next == NULL) | |
1557 | { | |
1558 | sdatap->tail = entry; | |
1559 | ||
1560 | /* We get here for the first time (at other times too) for this | |
1561 | section. Say we have contents. */ | |
1562 | if (! bfd_set_section_flags (sec->owner, sec, | |
1563 | bfd_get_section_flags (sec->owner, sec) | |
1564 | | SEC_HAS_CONTENTS)) | |
1565 | return NULL; | |
1566 | } | |
1567 | } | |
1568 | ||
dfa36a69 HPN |
1569 | /* Update the section size. This happens only when we add contents and |
1570 | re-size as we go. The section size will then be aligned to 32 bits. */ | |
eea6121a AM |
1571 | if (vma + size > sec->vma + sec->size) |
1572 | sec->size += (vma + size) - (sec->vma + sec->size); | |
3c3bdf30 NC |
1573 | return entry->data; |
1574 | } | |
1575 | ||
1576 | /* Set sizes once we've read in all sections. */ | |
1577 | ||
1578 | static void | |
278b4623 HPN |
1579 | mmo_map_set_sizes (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, |
1580 | void *ignored ATTRIBUTE_UNUSED) | |
3c3bdf30 | 1581 | { |
3c3bdf30 NC |
1582 | sec->lma = sec->vma; |
1583 | } | |
1584 | ||
1585 | /* Read the mmo file and turn it into sections. */ | |
1586 | ||
b34976b6 | 1587 | static bfd_boolean |
278b4623 | 1588 | mmo_scan (bfd *abfd) |
3c3bdf30 NC |
1589 | { |
1590 | unsigned int i; | |
1591 | unsigned int lineno = 1; | |
b34976b6 | 1592 | bfd_boolean error = FALSE; |
3c3bdf30 NC |
1593 | bfd_vma vma = 0; |
1594 | asection *sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); | |
1595 | asection *non_spec_sec = NULL; | |
1596 | bfd_vma non_spec_vma = 0; | |
3c3bdf30 NC |
1597 | bfd_size_type nbytes_read = 0; |
1598 | /* Buffer with room to read a 64-bit value. */ | |
1599 | bfd_byte buf[8]; | |
1600 | long stab_loc = -1; | |
1601 | char *file_names[256]; | |
1602 | ||
c9ba0c87 | 1603 | abfd->symcount = 0; |
3c3bdf30 NC |
1604 | memset (file_names, 0, sizeof (file_names)); |
1605 | ||
1606 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) | |
1607 | goto error_return; | |
1608 | ||
1609 | while ((nbytes_read = bfd_bread (buf, 4, abfd)) == 4) | |
1610 | { | |
1611 | if (buf[0] == LOP) | |
1612 | { | |
1613 | unsigned int y = bfd_get_8 (abfd, buf + 2); | |
1614 | unsigned int z = bfd_get_8 (abfd, buf + 3); | |
1615 | ||
1616 | /* Change back to the original section for lopcodes other | |
1617 | than LOP_QUOTE that comes after a LOP_SPEC. */ | |
1618 | if ((buf[1] != LOP_QUOTE || y != 0 || z != 1) | |
1619 | && non_spec_sec != NULL) | |
1620 | { | |
1621 | sec = non_spec_sec; | |
1622 | vma = non_spec_vma; | |
1623 | non_spec_sec = NULL; | |
1624 | } | |
1625 | ||
1626 | switch (buf[1]) | |
1627 | { | |
1628 | default: | |
1629 | (*_bfd_error_handler) | |
1630 | (_("%s: invalid mmo file: unsupported lopcode `%d'\n"), | |
1631 | bfd_get_filename (abfd), buf[1]); | |
1632 | bfd_set_error (bfd_error_bad_value); | |
1633 | goto error_return; | |
1634 | ||
1635 | case LOP_QUOTE: | |
1636 | /* Quote the next 32-bit word. */ | |
1637 | if (y != 0 || z != 1) | |
1638 | { | |
1639 | (*_bfd_error_handler) | |
1640 | (_("%s: invalid mmo file: expected YZ = 1 got YZ = %d for lop_quote\n"), | |
1641 | bfd_get_filename (abfd), y*256+z); | |
1642 | bfd_set_error (bfd_error_bad_value); | |
1643 | goto error_return; | |
1644 | } | |
1645 | if (bfd_bread (buf, 4, abfd) != 4) | |
1646 | goto error_return; | |
1647 | ||
1218d67d | 1648 | vma &= ~3; |
3c3bdf30 NC |
1649 | mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf)); |
1650 | vma += 4; | |
3c3bdf30 NC |
1651 | lineno++; |
1652 | break; | |
1653 | ||
1654 | case LOP_LOC: | |
1655 | /* Set vma (and section). */ | |
1656 | vma = (bfd_vma) y << 56; | |
1657 | if (z == 1) | |
1658 | { | |
1659 | /* Get a 32-bit value. */ | |
1660 | if (bfd_bread (buf, 4, abfd) != 4) | |
1661 | goto error_return; | |
1662 | ||
1663 | vma += bfd_get_32 (abfd, buf); | |
1664 | } | |
1665 | else if (z == 2) | |
1666 | { | |
1667 | /* Get a 64-bit value. */ | |
1668 | if (bfd_bread (buf, 8, abfd) != 8) | |
1669 | goto error_return; | |
1670 | ||
1671 | vma += bfd_get_64 (abfd, buf); | |
1672 | } | |
1673 | else | |
1674 | { | |
1675 | (*_bfd_error_handler) | |
1676 | (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_loc\n"), | |
1677 | bfd_get_filename (abfd), z); | |
1678 | bfd_set_error (bfd_error_bad_value); | |
1679 | goto error_return; | |
1680 | } | |
1681 | ||
1218d67d HPN |
1682 | /* When we decide which section the data goes into, we might |
1683 | create the section. If that happens, make sure the VMA at | |
1684 | creation time is tetra-aligned. */ | |
1685 | sec = mmo_decide_section (abfd, vma & ~3); | |
3c3bdf30 NC |
1686 | if (sec == NULL) |
1687 | goto error_return; | |
1688 | break; | |
1689 | ||
1690 | case LOP_SKIP: | |
1691 | /* Move forward within the same section. */ | |
1692 | vma += y * 256 + z; | |
1693 | ||
1694 | sec = mmo_decide_section (abfd, vma); | |
1695 | if (sec == NULL) | |
1696 | goto error_return; | |
1697 | break; | |
1698 | ||
1699 | case LOP_FIXO: | |
1700 | /* A fixup: Store the current vma somewhere. Position using | |
1701 | same format as LOP_LOC. */ | |
1702 | { | |
1703 | bfd_vma p = (bfd_vma) y << 56; | |
1704 | asection *fixosec; | |
1705 | ||
1706 | if (z == 1) | |
1707 | { | |
1708 | /* Get a 32-bit value. */ | |
1709 | if (bfd_bread (buf, 4, abfd) != 4) | |
1710 | goto error_return; | |
1711 | ||
1712 | p += bfd_get_32 (abfd, buf); | |
1713 | } | |
1714 | else if (z == 2) | |
1715 | { | |
1716 | /* Get a 64-bit value. */ | |
1717 | if (bfd_bread (buf, 8, abfd) != 8) | |
1718 | goto error_return; | |
1719 | ||
1720 | p += bfd_get_64 (abfd, buf); | |
1721 | } | |
1722 | else | |
1723 | { | |
1724 | (*_bfd_error_handler) | |
1725 | (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_fixo\n"), | |
1726 | bfd_get_filename (abfd), z); | |
1727 | bfd_set_error (bfd_error_bad_value); | |
1728 | goto error_return; | |
1729 | } | |
1730 | ||
1731 | /* The section where we store this address might be a | |
1732 | different one than the current section. */ | |
1733 | fixosec = mmo_decide_section (abfd, p); | |
1734 | if (fixosec == NULL) | |
1735 | goto error_return; | |
1736 | mmo_xore_64 (fixosec, p, vma); | |
1737 | } | |
1738 | break; | |
1739 | ||
1740 | case LOP_FIXR: | |
1741 | /* A fixup: Store YZ of this lopcode into YZ at vma - 4 * yz. */ | |
1742 | { | |
1743 | unsigned int yz = (y * 256 + z); | |
1744 | bfd_vma p = vma + 2 - 4 * yz; | |
1745 | asection *fixrsec = mmo_decide_section (abfd, p); | |
1746 | if (fixrsec == NULL) | |
1747 | goto error_return; | |
1748 | mmo_xore_16 (fixrsec, p, yz); | |
1749 | } | |
1750 | break; | |
1751 | ||
1752 | case LOP_FIXRX: | |
1753 | /* A fixup, similar to lop_fixr, but taking larger numbers | |
1754 | and can change branches into the opposite direction | |
1755 | (gasp!). */ | |
1756 | { | |
1757 | bfd_vma delta; | |
1758 | bfd_vma p; | |
1759 | asection *fixrsec; | |
1760 | ||
1761 | if (y != 0) | |
1762 | { | |
1763 | (*_bfd_error_handler) | |
1764 | (_("%s: invalid mmo file: expected y = 0, got y = %d for lop_fixrx\n"), | |
1765 | bfd_get_filename (abfd), y); | |
1766 | bfd_set_error (bfd_error_bad_value); | |
1767 | goto error_return; | |
1768 | } | |
1769 | ||
1770 | if (z != 16 && z != 24) | |
1771 | { | |
1772 | (*_bfd_error_handler) | |
1773 | (_("%s: invalid mmo file: expected z = 16 or z = 24, got z = %d for lop_fixrx\n"), | |
1774 | bfd_get_filename (abfd), z); | |
1775 | bfd_set_error (bfd_error_bad_value); | |
1776 | goto error_return; | |
1777 | } | |
1778 | ||
1779 | /* Get the next 32-bit value. */ | |
1780 | if (bfd_bread (buf, 4, abfd) != 4) | |
1781 | goto error_return; | |
1782 | ||
1783 | delta = bfd_get_32 (abfd, buf); | |
1784 | ||
1785 | /* Do an, ehm, involved calculation for the location of | |
1786 | the fixup. See mmixal documentation for a verbose | |
1787 | explanation. We follow it verbosely here for the | |
1788 | readers delight. */ | |
1789 | if (buf[0] == 0) | |
1790 | p = vma - 4 * delta; | |
1791 | else if (buf[0] == 1) | |
1792 | p = vma - 4 * ((delta & 0xffffff) - (1 << z)); | |
1793 | else | |
1794 | { | |
1795 | (*_bfd_error_handler) | |
1796 | (_("%s: invalid mmo file: leading byte of operand word must be 0 or 1, got %d for lop_fixrx\n"), | |
1797 | bfd_get_filename (abfd), buf[0]); | |
1798 | bfd_set_error (bfd_error_bad_value); | |
1799 | goto error_return; | |
1800 | } | |
1801 | ||
1802 | fixrsec = mmo_decide_section (abfd, vma); | |
1803 | if (fixrsec == NULL) | |
1804 | goto error_return; | |
1805 | mmo_xore_32 (fixrsec, p, delta); | |
1806 | } | |
1807 | break; | |
1808 | ||
1809 | case LOP_FILE: | |
1810 | /* Set current file and perhaps the file name. Reset line | |
1811 | number. */ | |
1812 | if (z != 0) | |
1813 | { | |
1814 | char *fname = bfd_malloc (z * 4 + 1); | |
1815 | ||
1816 | if (fname == NULL) | |
1817 | { | |
1818 | (*_bfd_error_handler) | |
1819 | (_("%s: cannot allocate file name for file number %d, %d bytes\n"), | |
1820 | bfd_get_filename (abfd), y, z * 4 + 1); | |
1821 | bfd_set_error (bfd_error_system_call); | |
1822 | goto error_return; | |
1823 | } | |
1824 | ||
1825 | fname[z * 4] = 0; | |
1826 | ||
1827 | for (i = 0; i < z; i++) | |
1828 | { | |
1829 | if (bfd_bread (fname + i * 4, 4, abfd) != 4) | |
1830 | { | |
1831 | free (fname); | |
1832 | goto error_return; | |
1833 | } | |
1834 | } | |
1835 | ||
1836 | if (file_names[y] != NULL) | |
1837 | { | |
1838 | (*_bfd_error_handler) | |
278b4623 HPN |
1839 | (_("%s: invalid mmo file: file number %d `%s'," |
1840 | " was already entered as `%s'\n"), | |
3c3bdf30 NC |
1841 | bfd_get_filename (abfd), y, fname, file_names[y]); |
1842 | bfd_set_error (bfd_error_bad_value); | |
1843 | goto error_return; | |
1844 | } | |
1845 | ||
1846 | file_names[y] = fname; | |
1847 | } | |
1848 | ||
1849 | if (file_names[y] == NULL) | |
1850 | { | |
1851 | (*_bfd_error_handler) | |
278b4623 HPN |
1852 | (_("%s: invalid mmo file: file name for number %d" |
1853 | " was not specified before use\n"), | |
3c3bdf30 NC |
1854 | bfd_get_filename (abfd), y); |
1855 | bfd_set_error (bfd_error_bad_value); | |
1856 | goto error_return; | |
1857 | } | |
1858 | ||
3c3bdf30 NC |
1859 | lineno = 0; |
1860 | break; | |
1861 | ||
1862 | case LOP_LINE: | |
1863 | /* Set line number. */ | |
1864 | lineno = y * 256 + z; | |
1865 | /* FIXME: Create a sequence of mmo-specific line number | |
1866 | entries for each section, then translate into canonical | |
1867 | format. */ | |
1868 | break; | |
1869 | ||
1870 | case LOP_SPEC: | |
1871 | /* Special data follows until the next non-lop_quote | |
1872 | lopcode. */ | |
1873 | non_spec_sec = sec; | |
1874 | non_spec_vma = vma; | |
1875 | sec = mmo_get_spec_section (abfd, y * 256 + z); | |
1876 | if (sec == NULL) | |
1877 | goto error_return; | |
1878 | ||
1879 | vma = sec->vma; | |
1880 | break; | |
1881 | ||
1882 | case LOP_PRE: | |
1883 | { | |
1884 | /* We ignore header information, except we read in the | |
1885 | creation time from the first 32-bit word with the time | |
1886 | in seconds since era. */ | |
1887 | if (z >= 1 | |
1888 | && bfd_bread (abfd->tdata.mmo_data->created, 4, | |
1889 | abfd) != 4) | |
1890 | goto error_return; | |
1891 | ||
1892 | for (i = 1; i < z; i++) | |
1893 | if (bfd_bread (buf, 4, abfd) != 4) | |
1894 | goto error_return; | |
1895 | } | |
1896 | break; | |
1897 | ||
1898 | case LOP_POST: | |
1899 | /* This tells of the contents of registers $Z..$255 at | |
1900 | startup. We make a section out of it, with VMA = Z * 8, | |
1901 | but only if Z != 255 or the contents is non-zero. */ | |
1902 | { | |
1903 | asection *rsec; | |
1904 | bfd_byte *loc; | |
1905 | bfd_vma first_octa; | |
1906 | bfd_vma startaddr_octa; | |
1907 | ||
1908 | /* Read first octaword outside loop to simplify logic when | |
1909 | excluding the Z == 255, octa == 0 case. */ | |
1910 | if (bfd_bread (buf, 8, abfd) != 8) | |
1911 | goto error_return; | |
1912 | ||
1913 | first_octa = bfd_get_64 (abfd, buf); | |
1914 | ||
1915 | /* Don't emit contents for the trivial case which is | |
1916 | always present; $255 pointing to Main. */ | |
1917 | if (z != 255) | |
1918 | { | |
1919 | rsec | |
1920 | = bfd_make_section_old_way (abfd, | |
1921 | MMIX_REG_CONTENTS_SECTION_NAME); | |
46fda84e | 1922 | rsec->flags |= SEC_LINKER_CREATED; |
3c3bdf30 NC |
1923 | rsec->vma = z * 8; |
1924 | loc = mmo_get_loc (rsec, z * 8, (255 - z) * 8); | |
1925 | bfd_put_64 (abfd, first_octa, loc); | |
1926 | ||
1927 | for (i = z + 1; i < 255; i++) | |
1928 | { | |
1929 | if (bfd_bread (loc + (i - z) * 8, 8, abfd) != 8) | |
1930 | goto error_return; | |
1931 | } | |
1932 | ||
1933 | /* Read out the last octabyte, and use it to set the | |
1934 | start address. */ | |
1935 | if (bfd_bread (buf, 8, abfd) != 8) | |
1936 | goto error_return; | |
1937 | ||
1938 | startaddr_octa = bfd_get_64 (abfd, buf); | |
1939 | } | |
1940 | else | |
1941 | startaddr_octa = first_octa; | |
1942 | ||
1943 | if (! bfd_set_start_address (abfd, startaddr_octa)) | |
1944 | { | |
1945 | /* Currently this can't fail, but this should handle | |
1946 | future failures. */ | |
1947 | bfd_set_error (bfd_error_bad_value); | |
1948 | goto error_return; | |
1949 | } | |
1950 | } | |
1951 | break; | |
1952 | ||
1953 | case LOP_STAB: | |
1954 | /* We read in the symbols now, not later. */ | |
1955 | if (y != 0 || z != 0) | |
1956 | { | |
1957 | (*_bfd_error_handler) | |
278b4623 HPN |
1958 | (_("%s: invalid mmo file: fields y and z of lop_stab" |
1959 | " non-zero, y: %d, z: %d\n"), | |
3c3bdf30 NC |
1960 | bfd_get_filename (abfd), y, z); |
1961 | bfd_set_error (bfd_error_bad_value); | |
1962 | goto error_return; | |
1963 | } | |
1964 | ||
1965 | /* Save the location, so we can check that YZ in the LOP_END | |
1966 | is correct. */ | |
1967 | stab_loc = bfd_tell (abfd); | |
1968 | ||
1969 | /* It's not said that an MMO can be without symbols (though | |
1970 | mmixal will refuse to assemble files without Main), but | |
1971 | it seems it would still be a valid mmo-file, so allow it. | |
1972 | We detect the absence of a symbol area in that the upper | |
1973 | limit is computed (from the lop_end YZ field) as 0. | |
1974 | Don't call mmo_get_symbols; it can only detect the end of | |
1975 | a valid symbol trie, not the absence of one. */ | |
1976 | if (abfd->tdata.mmo_data->max_symbol_length != 0 | |
1977 | && ! mmo_get_symbols (abfd)) | |
1978 | goto error_return; | |
1979 | break; | |
1980 | ||
1981 | case LOP_END: | |
1982 | { | |
1983 | /* This must be the last 32-bit word in an mmo file. | |
1984 | Let's find out. */ | |
1985 | struct stat statbuf; | |
74633dd0 | 1986 | file_ptr curpos = bfd_tell (abfd); |
3c3bdf30 NC |
1987 | |
1988 | if (bfd_stat (abfd, &statbuf) < 0) | |
1989 | goto error_return; | |
1990 | ||
1991 | if (statbuf.st_size != curpos) | |
1992 | { | |
1993 | (*_bfd_error_handler) | |
278b4623 HPN |
1994 | (_("%s: invalid mmo file: lop_end not last item in" |
1995 | " file\n"), | |
3c3bdf30 NC |
1996 | bfd_get_filename (abfd)); |
1997 | bfd_set_error (bfd_error_bad_value); | |
1998 | goto error_return; | |
1999 | } | |
2000 | ||
2001 | /* Check that the YZ field is right. Subtract the size of | |
2002 | this LOP_END in the calculation; YZ does not include | |
2003 | it. */ | |
2004 | if ((long) (y * 256 + z) * 4 != (curpos - stab_loc) - 4) | |
2005 | { | |
2006 | (*_bfd_error_handler) | |
278b4623 HPN |
2007 | (_("%s: invalid mmo file: YZ of lop_end (%ld)" |
2008 | " not equal to the number of tetras to the preceding" | |
2009 | " lop_stab (%ld)\n"), | |
3c3bdf30 NC |
2010 | bfd_get_filename (abfd), (long) (y * 256 + z), |
2011 | (curpos - stab_loc - 4)/4); | |
2012 | bfd_set_error (bfd_error_bad_value); | |
2013 | goto error_return; | |
2014 | } | |
2015 | ||
2016 | bfd_map_over_sections (abfd, mmo_map_set_sizes, NULL); | |
2017 | goto done; | |
2018 | } | |
2019 | } | |
2020 | } | |
2021 | else | |
2022 | { | |
2023 | /* This wasn't a lopcode, so store it in the current section. */ | |
2024 | mmo_xore_32 (sec, vma & ~3, bfd_get_32 (abfd, buf)); | |
2025 | vma += 4; | |
2026 | vma &= ~3; | |
2027 | lineno++; | |
2028 | } | |
2029 | } | |
2030 | ||
2031 | /* We know this file is a multiple of four bytes (checked in | |
2032 | mmo_object_p), so if we got something other than 0, this was a bad | |
2033 | file (although it's more likely we'll get 0 in that case too). | |
2034 | If we got end-of-file, then there was no lop_stab, so the file has | |
2035 | invalid format. */ | |
2036 | ||
2037 | if (nbytes_read != 0) | |
2038 | bfd_set_error (bfd_error_system_call); | |
2039 | else | |
2040 | bfd_set_error (bfd_error_bad_value); | |
2041 | ||
2042 | error_return: | |
b34976b6 | 2043 | error = TRUE; |
3c3bdf30 NC |
2044 | done: |
2045 | /* Mark the .text and .data section with their normal attribute if they | |
2046 | contain anything. This is not redundant wrt. mmo_decide_section, | |
2047 | since that code might never execute, and conversely the alloc+code | |
2048 | section flags must be set then. */ | |
2049 | sec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); | |
2050 | if (sec != NULL | |
2051 | && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) | |
2052 | && ! bfd_set_section_flags (abfd, sec, | |
2053 | bfd_get_section_flags (abfd, sec) | |
2054 | | SEC_ALLOC | SEC_LOAD | SEC_CODE)) | |
b34976b6 | 2055 | error = TRUE; |
3c3bdf30 NC |
2056 | |
2057 | sec = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); | |
2058 | if (sec != NULL | |
2059 | && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) | |
2060 | && ! bfd_set_section_flags (abfd, sec, | |
2061 | bfd_get_section_flags (abfd, sec) | |
2062 | | SEC_ALLOC | SEC_LOAD)) | |
b34976b6 | 2063 | error = TRUE; |
3c3bdf30 NC |
2064 | |
2065 | /* Free whatever resources we took. */ | |
2066 | for (i = 0; i < sizeof (file_names) / sizeof (file_names[0]); i++) | |
2067 | if (file_names[i]) | |
2068 | free (file_names[i]); | |
82e51918 | 2069 | return ! error; |
3c3bdf30 NC |
2070 | } |
2071 | ||
2072 | /* A hook to set up object file dependent section information. For mmo, | |
2073 | we point out the shape of allocated section contents. */ | |
2074 | ||
b34976b6 | 2075 | static bfd_boolean |
f592407e | 2076 | mmo_new_section_hook (bfd *abfd, asection *newsect) |
3c3bdf30 | 2077 | { |
3c3bdf30 | 2078 | if (!newsect->used_by_bfd) |
f592407e AM |
2079 | { |
2080 | /* We zero-fill all fields and assume NULL is represented by an all | |
2081 | zero-bit pattern. */ | |
2082 | newsect->used_by_bfd | |
2083 | = bfd_zalloc (abfd, sizeof (struct mmo_section_data_struct)); | |
2084 | if (!newsect->used_by_bfd) | |
2085 | return FALSE; | |
2086 | } | |
3c3bdf30 NC |
2087 | |
2088 | /* Always align to at least 32-bit words. */ | |
2089 | newsect->alignment_power = 2; | |
f592407e | 2090 | return _bfd_generic_new_section_hook (abfd, newsect); |
3c3bdf30 NC |
2091 | } |
2092 | ||
2093 | /* We already have section contents loaded for sections that have | |
2094 | contents. */ | |
2095 | ||
b34976b6 | 2096 | static bfd_boolean |
278b4623 HPN |
2097 | mmo_get_section_contents (bfd *abfd ATTRIBUTE_UNUSED, |
2098 | asection *sec, | |
2099 | void * location, | |
2100 | file_ptr offset, | |
2101 | bfd_size_type bytes_to_do) | |
3c3bdf30 NC |
2102 | { |
2103 | /* Iterate over diminishing chunk sizes, copying contents, like | |
2104 | mmo_set_section_contents. */ | |
2105 | while (bytes_to_do) | |
2106 | { | |
2107 | /* A minor song-and-dance to make sure we're not bitten by the | |
2108 | distant possibility of the cast from bfd_vma to int making the | |
2109 | chunk zero-sized. */ | |
2110 | int chunk_size | |
2111 | = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; | |
2112 | bfd_byte *loc; | |
2113 | ||
2114 | do | |
2115 | loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); | |
2116 | while (loc == NULL && (chunk_size /= 2) != 0); | |
2117 | ||
2118 | if (chunk_size == 0) | |
b34976b6 | 2119 | return FALSE; |
3c3bdf30 NC |
2120 | |
2121 | memcpy (location, loc, chunk_size); | |
2122 | ||
28cc9170 | 2123 | location = (bfd_byte *) location + chunk_size; |
3c3bdf30 NC |
2124 | bytes_to_do -= chunk_size; |
2125 | offset += chunk_size; | |
2126 | } | |
b34976b6 | 2127 | return TRUE; |
3c3bdf30 NC |
2128 | } |
2129 | ||
2130 | /* Return the amount of memory needed to read the symbol table. */ | |
2131 | ||
2132 | static long | |
278b4623 | 2133 | mmo_get_symtab_upper_bound (bfd *abfd) |
3c3bdf30 NC |
2134 | { |
2135 | return (abfd->symcount + 1) * sizeof (asymbol *); | |
2136 | } | |
2137 | ||
2138 | /* Sort mmo symbols by serial number. */ | |
2139 | ||
2140 | static int | |
278b4623 | 2141 | mmo_sort_mmo_symbols (const void *arg1, const void *arg2) |
3c3bdf30 | 2142 | { |
3f9c735e AM |
2143 | const struct mmo_symbol *sym1 = *(const struct mmo_symbol **) arg1; |
2144 | const struct mmo_symbol *sym2 = *(const struct mmo_symbol **) arg2; | |
3c3bdf30 NC |
2145 | |
2146 | /* Sort by serial number first. */ | |
2147 | if (sym1->serno < sym2->serno) | |
2148 | return -1; | |
2149 | else if (sym1->serno > sym2->serno) | |
2150 | return 1; | |
2151 | ||
2152 | /* Then sort by address of the table entries. */ | |
3f9c735e | 2153 | return ((const char *) arg1 - (const char *) arg2); |
3c3bdf30 NC |
2154 | } |
2155 | ||
2156 | /* Translate the symbol table. */ | |
2157 | ||
2158 | static long | |
278b4623 | 2159 | mmo_canonicalize_symtab (bfd *abfd, asymbol **alocation) |
3c3bdf30 NC |
2160 | { |
2161 | unsigned int symcount = bfd_get_symcount (abfd); | |
2162 | asymbol *csymbols; | |
2163 | unsigned int i; | |
2164 | ||
2165 | csymbols = abfd->tdata.mmo_data->csymbols; | |
b9da616a | 2166 | if (csymbols == NULL && symcount != 0) |
3c3bdf30 NC |
2167 | { |
2168 | asymbol *c; | |
2169 | struct mmo_symbol *s; | |
2170 | struct mmo_symbol **msp; | |
2171 | ||
2172 | /* First we store the symbols into the table we'll return, then we | |
2173 | qsort it on the serial number, with secondary on the address of | |
2174 | the symbol, to preserve order if there would be non-unique serial | |
2175 | numbers. */ | |
2176 | for (s = abfd->tdata.mmo_data->symbols, | |
2177 | msp = (struct mmo_symbol **) alocation; | |
2178 | s != NULL; | |
2179 | s = s->next, ++msp) | |
2180 | *msp = s; | |
2181 | ||
2182 | *msp = NULL; | |
2183 | ||
2184 | qsort (alocation, symcount, sizeof (struct mmo_symbol *), | |
2185 | mmo_sort_mmo_symbols); | |
2186 | ||
2187 | csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol)); | |
b9da616a AM |
2188 | if (csymbols == NULL) |
2189 | return -1; | |
3c3bdf30 NC |
2190 | abfd->tdata.mmo_data->csymbols = csymbols; |
2191 | ||
2192 | for (msp = (struct mmo_symbol **) alocation, c = csymbols; | |
2193 | *msp != NULL; | |
2194 | msp++, ++c) | |
2195 | { | |
2196 | s = *msp; | |
2197 | c->the_bfd = abfd; | |
2198 | c->name = s->name; | |
2199 | c->value = s->value; | |
2200 | c->flags = BSF_GLOBAL; | |
2201 | ||
2202 | if (s->sym_type == mmo_data_sym) | |
2203 | { | |
2204 | c->section | |
2205 | = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); | |
2206 | ||
2207 | if (c->section == NULL) | |
2208 | c->section = bfd_abs_section_ptr; | |
2209 | else | |
2210 | c->value -= c->section->vma; | |
2211 | } | |
2212 | else if (s->sym_type == mmo_undef_sym) | |
2213 | c->section = bfd_und_section_ptr; | |
2214 | else if (s->sym_type == mmo_reg_sym) | |
2215 | { | |
2216 | c->section | |
2217 | = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); | |
46fda84e | 2218 | c->section->flags |= SEC_LINKER_CREATED; |
3c3bdf30 NC |
2219 | } |
2220 | else | |
2221 | { | |
2222 | asection *textsec | |
2223 | = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); | |
aa69fe43 | 2224 | asection *datasec; |
3c3bdf30 NC |
2225 | |
2226 | if (textsec != NULL | |
2227 | && c->value >= textsec->vma | |
eea6121a | 2228 | && c->value <= textsec->vma + textsec->size) |
3c3bdf30 NC |
2229 | { |
2230 | c->section = textsec; | |
2231 | c->value -= c->section->vma; | |
2232 | } | |
aa69fe43 HPN |
2233 | /* In mmo, symbol types depend on the VMA. Therefore, if |
2234 | the data section isn't within the usual bounds, its | |
2235 | symbols are marked as absolute. Correct that. This | |
2236 | means we can't have absolute symbols with values matching | |
2237 | data section addresses, but we also can't have with | |
2238 | absolute symbols with values matching text section | |
2239 | addresses. For such needs, use the ELF format. */ | |
2240 | else if ((datasec | |
2241 | = bfd_get_section_by_name (abfd, | |
2242 | MMO_DATA_SECTION_NAME)) | |
2243 | != NULL | |
2244 | && c->value >= datasec->vma | |
2245 | && c->value <= datasec->vma + datasec->size) | |
2246 | { | |
2247 | c->section = datasec; | |
2248 | c->value -= c->section->vma; | |
2249 | } | |
3c3bdf30 NC |
2250 | else |
2251 | c->section = bfd_abs_section_ptr; | |
2252 | } | |
2253 | ||
2254 | c->udata.p = NULL; | |
2255 | } | |
2256 | } | |
2257 | ||
2258 | /* Last, overwrite the incoming table with the right-type entries. */ | |
2259 | for (i = 0; i < symcount; i++) | |
2260 | *alocation++ = csymbols++; | |
2261 | *alocation = NULL; | |
2262 | ||
2263 | return symcount; | |
2264 | } | |
2265 | ||
3c3bdf30 NC |
2266 | /* Get information about a symbol. */ |
2267 | ||
2268 | static void | |
278b4623 HPN |
2269 | mmo_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED, |
2270 | asymbol *symbol, symbol_info *ret) | |
3c3bdf30 NC |
2271 | { |
2272 | bfd_symbol_info (symbol, ret); | |
2273 | } | |
2274 | ||
2275 | static void | |
278b4623 HPN |
2276 | mmo_print_symbol (bfd *abfd, void *afile, asymbol *symbol, |
2277 | bfd_print_symbol_type how) | |
3c3bdf30 NC |
2278 | { |
2279 | FILE *file = (FILE *) afile; | |
2280 | ||
2281 | switch (how) | |
2282 | { | |
2283 | case bfd_print_symbol_name: | |
2284 | fprintf (file, "%s", symbol->name); | |
2285 | break; | |
2286 | default: | |
278b4623 | 2287 | bfd_print_symbol_vandf (abfd, file, symbol); |
3c3bdf30 NC |
2288 | |
2289 | fprintf (file, " %-5s %s", | |
2290 | symbol->section->name, | |
2291 | symbol->name); | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | /* We can't map a file directly into executable code, so the | |
2296 | size of header information is irrelevant. */ | |
2297 | ||
2298 | static int | |
278b4623 | 2299 | mmo_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, |
a6b96beb | 2300 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
3c3bdf30 NC |
2301 | { |
2302 | return 0; | |
2303 | } | |
2304 | ||
2305 | /* Write the (section-neutral) file preamble. */ | |
2306 | ||
b34976b6 | 2307 | static bfd_boolean |
278b4623 | 2308 | mmo_internal_write_header (bfd *abfd) |
3c3bdf30 | 2309 | { |
3f9c735e | 2310 | const char lop_pre_bfd[] = { LOP, LOP_PRE, 1, 1}; |
3c3bdf30 NC |
2311 | |
2312 | if (bfd_bwrite (lop_pre_bfd, 4, abfd) != 4) | |
b34976b6 | 2313 | return FALSE; |
3c3bdf30 NC |
2314 | |
2315 | /* Copy creation time of original file. */ | |
2316 | if (bfd_bwrite (abfd->tdata.mmo_data->created, 4, abfd) != 4) | |
b34976b6 | 2317 | return FALSE; |
3c3bdf30 | 2318 | |
b34976b6 | 2319 | return TRUE; |
3c3bdf30 NC |
2320 | } |
2321 | ||
2322 | /* Write the LOP_POST record, with global register initializations. | |
2323 | Z is the Z field of the LOP_POST, corresponding to 255 - number of | |
2324 | registers at DATA. The Z = 255 field is filled in with the | |
2325 | start-address. */ | |
2326 | ||
b34976b6 | 2327 | static bfd_boolean |
278b4623 | 2328 | mmo_internal_write_post (bfd *abfd, int z, asection *sec) |
3c3bdf30 NC |
2329 | { |
2330 | int i; | |
2331 | bfd_byte buf[8]; | |
2332 | mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_POST << 16) | z); | |
2333 | ||
2334 | for (i = z; i < 255; i++) | |
2335 | { | |
2336 | bfd_byte *data = mmo_get_loc (sec, i * 8, 8); | |
2337 | ||
2338 | if (bfd_bwrite (data, 8, abfd) != 8) | |
b34976b6 | 2339 | return FALSE; |
3c3bdf30 NC |
2340 | } |
2341 | ||
2342 | /* For Z == $255, we always emit the start location; supposedly Main, | |
2343 | but we have it handy at bfd_get_start_address. If we're called with | |
2344 | Z == 255, don't assume DATA is valid. */ | |
2345 | bfd_put_64 (abfd, bfd_get_start_address (abfd), buf); | |
2346 | ||
82e51918 | 2347 | return ! abfd->tdata.mmo_data->have_error && bfd_bwrite (buf, 8, abfd) == 8; |
3c3bdf30 NC |
2348 | } |
2349 | ||
2350 | /* Translate to and from BFD flags. This is to make sure that we don't | |
2351 | get bitten by BFD flag number changes. */ | |
2352 | ||
2353 | static flagword | |
278b4623 | 2354 | mmo_sec_flags_from_bfd_flags (flagword flags) |
3c3bdf30 NC |
2355 | { |
2356 | flagword oflags = 0; | |
2357 | ||
2358 | if (flags & SEC_ALLOC) | |
2359 | oflags |= MMO_SEC_ALLOC; | |
2360 | if (flags & SEC_LOAD) | |
2361 | oflags |= MMO_SEC_LOAD; | |
2362 | if (flags & SEC_RELOC) | |
2363 | oflags |= MMO_SEC_RELOC; | |
2364 | if (flags & SEC_READONLY) | |
2365 | oflags |= MMO_SEC_READONLY; | |
2366 | if (flags & SEC_CODE) | |
2367 | oflags |= MMO_SEC_CODE; | |
2368 | if (flags & SEC_DATA) | |
2369 | oflags |= MMO_SEC_DATA; | |
2370 | if (flags & SEC_NEVER_LOAD) | |
2371 | oflags |= MMO_SEC_NEVER_LOAD; | |
2372 | if (flags & SEC_IS_COMMON) | |
2373 | oflags |= MMO_SEC_IS_COMMON; | |
2374 | if (flags & SEC_DEBUGGING) | |
2375 | oflags |= MMO_SEC_DEBUGGING; | |
2376 | ||
2377 | return oflags; | |
2378 | } | |
2379 | ||
2380 | static flagword | |
278b4623 | 2381 | bfd_sec_flags_from_mmo_flags (flagword flags) |
3c3bdf30 NC |
2382 | { |
2383 | flagword oflags = 0; | |
2384 | ||
2385 | if (flags & MMO_SEC_ALLOC) | |
2386 | oflags |= SEC_ALLOC; | |
2387 | if (flags & MMO_SEC_LOAD) | |
2388 | oflags |= SEC_LOAD; | |
2389 | if (flags & MMO_SEC_RELOC) | |
2390 | oflags |= SEC_RELOC; | |
2391 | if (flags & MMO_SEC_READONLY) | |
2392 | oflags |= SEC_READONLY; | |
2393 | if (flags & MMO_SEC_CODE) | |
2394 | oflags |= SEC_CODE; | |
2395 | if (flags & MMO_SEC_DATA) | |
2396 | oflags |= SEC_DATA; | |
2397 | if (flags & MMO_SEC_NEVER_LOAD) | |
2398 | oflags |= SEC_NEVER_LOAD; | |
2399 | if (flags & MMO_SEC_IS_COMMON) | |
2400 | oflags |= SEC_IS_COMMON; | |
2401 | if (flags & MMO_SEC_DEBUGGING) | |
2402 | oflags |= SEC_DEBUGGING; | |
2403 | ||
2404 | return oflags; | |
2405 | } | |
2406 | ||
aa69fe43 HPN |
2407 | /* Return TRUE iff the leading or trailing tetrabyte in SEC is defined and |
2408 | is 0. */ | |
2409 | ||
2410 | static bfd_boolean | |
278b4623 | 2411 | mmo_has_leading_or_trailing_zero_tetra_p (bfd *abfd, asection *sec) |
aa69fe43 HPN |
2412 | { |
2413 | bfd_vma secaddr = bfd_get_section_vma (abfd, sec); | |
2414 | ||
2415 | if (sec->size < 4) | |
2416 | return FALSE; | |
2417 | ||
2418 | if (bfd_get_32 (abfd, mmo_get_loc (sec, secaddr, 4)) == 0 | |
2419 | && bfd_get_32 (abfd, | |
2420 | mmo_get_loc (sec, secaddr + sec->size - 4, 4)) == 0) | |
2421 | return TRUE; | |
2422 | ||
2423 | return FALSE; | |
2424 | } | |
2425 | ||
3c3bdf30 NC |
2426 | /* Write a section. */ |
2427 | ||
b34976b6 | 2428 | static bfd_boolean |
278b4623 | 2429 | mmo_internal_write_section (bfd *abfd, asection *sec) |
3c3bdf30 NC |
2430 | { |
2431 | /* We do it differently depending on what section this is: | |
2432 | ||
2433 | ".text": Output, prepended by information about the first source file | |
2434 | (not yet implemented.) | |
2435 | ||
2436 | ".data": Output. | |
2437 | ||
2438 | (".MMIX.reg_contents": Not handled here.) | |
2439 | ||
2440 | Anything else: Output inside a lop_spec 80, in the format described | |
2441 | above. */ | |
2442 | ||
2443 | if (strcmp (sec->name, MMO_TEXT_SECTION_NAME) == 0) | |
aa69fe43 HPN |
2444 | { |
2445 | bfd_vma secaddr = bfd_get_section_vma (abfd, sec); | |
2446 | ||
2447 | /* Because leading and trailing zeros are omitted in output, we need to | |
2448 | specify the section boundaries so they're correct when the file | |
2449 | is read in again. That's also the case if this section is | |
2450 | specified as not within its usual boundaries or alignments. */ | |
2451 | if (sec->size != 0 | |
2452 | && (secaddr + sec->size >= (bfd_vma) 1 << 56 | |
2453 | || (secaddr & 3) != 0 | |
2454 | || (sec->size & 3) != 0 | |
2455 | || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) | |
2456 | { | |
2457 | if (!mmo_write_section_description (abfd, sec)) | |
2458 | return FALSE; | |
2459 | } | |
2460 | ||
2461 | /* FIXME: Output source file name and line number. */ | |
2462 | return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); | |
2463 | } | |
3c3bdf30 | 2464 | else if (strcmp (sec->name, MMO_DATA_SECTION_NAME) == 0) |
aa69fe43 HPN |
2465 | { |
2466 | bfd_vma secaddr = bfd_get_section_vma (abfd, sec); | |
2467 | ||
2468 | /* Same goes as for MMO_TEXT_SECTION_NAME above. */ | |
2469 | if (sec->size != 0 | |
2470 | && (secaddr < (bfd_vma) 0x20 << 56 | |
2471 | || secaddr + sec->size >= (bfd_vma) 0x21 << 56 | |
2472 | || (secaddr & 3) != 0 | |
2473 | || (sec->size & 3) != 0 | |
2474 | || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) | |
2475 | { | |
2476 | if (!mmo_write_section_description (abfd, sec)) | |
2477 | return FALSE; | |
2478 | } | |
2479 | ||
2480 | return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); | |
2481 | } | |
3c3bdf30 NC |
2482 | else if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) |
2483 | /* Not handled here. */ | |
2484 | { | |
2485 | /* This would normally be an abort call since this can't happen, but | |
2486 | we don't do that. */ | |
2487 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2488 | return FALSE; |
3c3bdf30 | 2489 | } |
0112cd26 | 2490 | else if (CONST_STRNEQ (sec->name, MMIX_OTHER_SPEC_SECTION_PREFIX)) |
3c3bdf30 NC |
2491 | { |
2492 | int n = atoi (sec->name + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)); | |
0112cd26 | 2493 | |
3c3bdf30 | 2494 | mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_SPEC << 16) | n); |
82e51918 | 2495 | return (! abfd->tdata.mmo_data->have_error |
68bfbfcc | 2496 | && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); |
3c3bdf30 NC |
2497 | } |
2498 | /* Ignore sections that are just allocated or empty; we write out | |
2499 | _contents_ here. */ | |
2500 | else if ((bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) != 0 | |
eea6121a | 2501 | && sec->size != 0) |
3c3bdf30 | 2502 | { |
aa69fe43 HPN |
2503 | if (!mmo_write_section_description (abfd, sec)) |
2504 | return FALSE; | |
2505 | ||
2506 | /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually | |
2507 | loaded. */ | |
2508 | if (bfd_get_section_flags (abfd, sec) & SEC_LOAD) | |
2509 | return (! abfd->tdata.mmo_data->have_error | |
2510 | && mmo_write_loc_chunk_list (abfd, | |
2511 | mmo_section_data (sec)->head)); | |
2512 | return (! abfd->tdata.mmo_data->have_error | |
2513 | && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); | |
2514 | } | |
2515 | ||
2516 | /* Some section without contents. */ | |
2517 | return TRUE; | |
2518 | } | |
2519 | ||
2520 | /* Write the description of a section, extended-mmo-style. */ | |
2521 | ||
2522 | static bfd_boolean | |
278b4623 | 2523 | mmo_write_section_description (bfd *abfd, asection *sec) |
aa69fe43 HPN |
2524 | { |
2525 | /* Keep the following document-comment formatted the way it is. */ | |
3c3bdf30 NC |
2526 | /* |
2527 | INODE | |
2528 | mmo section mapping, , Symbol-table, mmo | |
2529 | SUBSECTION | |
2530 | mmo section mapping | |
2531 | ||
2532 | The implementation in BFD uses special data type 80 (decimal) to | |
2533 | encapsulate and describe named sections, containing e.g.@: debug | |
2534 | information. If needed, any datum in the encapsulation will be | |
2535 | quoted using lop_quote. First comes a 32-bit word holding the | |
2536 | number of 32-bit words containing the zero-terminated zero-padded | |
2537 | segment name. After the name there's a 32-bit word holding flags | |
2538 | describing the section type. Then comes a 64-bit big-endian word | |
2539 | with the section length (in bytes), then another with the section | |
2540 | start address. Depending on the type of section, the contents | |
2541 | might follow, zero-padded to 32-bit boundary. For a loadable | |
2542 | section (such as data or code), the contents might follow at some | |
2543 | later point, not necessarily immediately, as a lop_loc with the | |
2544 | same start address as in the section description, followed by the | |
2545 | contents. This in effect forms a descriptor that must be emitted | |
2546 | before the actual contents. Sections described this way must not | |
2547 | overlap. | |
2548 | ||
2549 | For areas that don't have such descriptors, synthetic sections are | |
2550 | formed by BFD. Consecutive contents in the two memory areas | |
2551 | @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} and | |
2552 | @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} are entered in | |
2553 | sections named <<.text>> and <<.data>> respectively. If an area | |
2554 | is not otherwise described, but would together with a neighboring | |
2555 | lower area be less than @samp{0x40000000} bytes long, it is joined | |
2556 | with the lower area and the gap is zero-filled. For other cases, | |
2557 | a new section is formed, named <<.MMIX.sec.@var{n}>>. Here, | |
2558 | @var{n} is a number, a running count through the mmo file, | |
2559 | starting at 0. | |
2560 | ||
2561 | EXAMPLE | |
2562 | A loadable section specified as: | |
2563 | ||
2564 | | .section secname,"ax" | |
2565 | | TETRA 1,2,3,4,-1,-2009 | |
2566 | | BYTE 80 | |
2567 | ||
2568 | and linked to address @samp{0x4}, is represented by the sequence: | |
2569 | ||
2570 | | 0x98080050 - lop_spec 80 | |
2571 | | 0x00000002 - two 32-bit words for the section name | |
2572 | | 0x7365636e - "secn" | |
2573 | | 0x616d6500 - "ame\0" | |
2574 | | 0x00000033 - flags CODE, READONLY, LOAD, ALLOC | |
2575 | | 0x00000000 - high 32 bits of section length | |
2576 | | 0x0000001c - section length is 28 bytes; 6 * 4 + 1 + alignment to 32 bits | |
2577 | | 0x00000000 - high 32 bits of section address | |
2578 | | 0x00000004 - section address is 4 | |
2579 | | 0x98010002 - 64 bits with address of following data | |
dfa36a69 HPN |
2580 | | 0x00000000 - high 32 bits of address |
2581 | | 0x00000004 - low 32 bits: data starts at address 4 | |
3c3bdf30 NC |
2582 | | 0x00000001 - 1 |
2583 | | 0x00000002 - 2 | |
2584 | | 0x00000003 - 3 | |
2585 | | 0x00000004 - 4 | |
2586 | | 0xffffffff - -1 | |
2587 | | 0xfffff827 - -2009 | |
2588 | | 0x50000000 - 80 as a byte, padded with zeros. | |
2589 | ||
2590 | Note that the lop_spec wrapping does not include the section | |
2591 | contents. Compare this to a non-loaded section specified as: | |
2592 | ||
2593 | | .section thirdsec | |
2594 | | TETRA 200001,100002 | |
2595 | | BYTE 38,40 | |
2596 | ||
2597 | This, when linked to address @samp{0x200000000000001c}, is | |
2598 | represented by: | |
2599 | ||
2600 | | 0x98080050 - lop_spec 80 | |
2601 | | 0x00000002 - two 32-bit words for the section name | |
2602 | | 0x7365636e - "thir" | |
2603 | | 0x616d6500 - "dsec" | |
2604 | | 0x00000010 - flag READONLY | |
2605 | | 0x00000000 - high 32 bits of section length | |
2606 | | 0x0000000c - section length is 12 bytes; 2 * 4 + 2 + alignment to 32 bits | |
dfa36a69 HPN |
2607 | | 0x20000000 - high 32 bits of address |
2608 | | 0x0000001c - low 32 bits of address 0x200000000000001c | |
3c3bdf30 NC |
2609 | | 0x00030d41 - 200001 |
2610 | | 0x000186a2 - 100002 | |
2611 | | 0x26280000 - 38, 40 as bytes, padded with zeros | |
2612 | ||
dfa36a69 | 2613 | For the latter example, the section contents must not be |
3c3bdf30 NC |
2614 | loaded in memory, and is therefore specified as part of the |
2615 | special data. The address is usually unimportant but might | |
2616 | provide information for e.g.@: the DWARF 2 debugging format. */ | |
2617 | ||
aa69fe43 HPN |
2618 | mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION); |
2619 | mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4); | |
f075ee0c | 2620 | mmo_write_chunk (abfd, (bfd_byte *) sec->name, strlen (sec->name)); |
aa69fe43 HPN |
2621 | mmo_flush_chunk (abfd); |
2622 | /* FIXME: We can get debug sections (.debug_line & Co.) with a section | |
2623 | flag still having SEC_RELOC set. Investigate. This might be true | |
2624 | for all alien sections; perhaps mmo.em should clear that flag. Might | |
2625 | be related to weak references. */ | |
2626 | mmo_write_tetra (abfd, | |
2627 | mmo_sec_flags_from_bfd_flags | |
2628 | (bfd_get_section_flags (abfd, sec))); | |
2629 | mmo_write_octa (abfd, sec->size); | |
2630 | mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec)); | |
b34976b6 | 2631 | return TRUE; |
3c3bdf30 NC |
2632 | } |
2633 | ||
2634 | /* We save up all data before output. */ | |
2635 | ||
b34976b6 | 2636 | static bfd_boolean |
278b4623 HPN |
2637 | mmo_set_section_contents (bfd *abfd ATTRIBUTE_UNUSED, sec_ptr sec, |
2638 | const void *location, file_ptr offset, | |
2639 | bfd_size_type bytes_to_do) | |
3c3bdf30 NC |
2640 | { |
2641 | /* Iterate over diminishing chunk sizes, copying contents. */ | |
2642 | while (bytes_to_do) | |
2643 | { | |
2644 | /* A minor song-and-dance to make sure we're not bitten by the | |
2645 | distant possibility of the cast from bfd_vma to int making the | |
2646 | chunk zero-sized. */ | |
2647 | int chunk_size | |
2648 | = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; | |
2649 | bfd_byte *loc; | |
2650 | ||
2651 | do | |
2652 | loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); | |
2653 | while (loc == NULL && (chunk_size /= 2) != 0); | |
2654 | ||
2655 | if (chunk_size == 0) | |
b34976b6 | 2656 | return FALSE; |
3c3bdf30 NC |
2657 | |
2658 | memcpy (loc, location, chunk_size); | |
2659 | ||
28cc9170 | 2660 | location = (bfd_byte *) location + chunk_size; |
3c3bdf30 NC |
2661 | bytes_to_do -= chunk_size; |
2662 | offset += chunk_size; | |
2663 | } | |
b34976b6 | 2664 | return TRUE; |
3c3bdf30 NC |
2665 | } |
2666 | ||
2667 | /* Add a symbol to a trie-tree. */ | |
2668 | ||
b34976b6 | 2669 | static bfd_boolean |
278b4623 HPN |
2670 | mmo_internal_add_3_sym (bfd *abfd, struct mmo_symbol_trie *rootp, |
2671 | const struct mmo_symbol *symp) | |
3c3bdf30 | 2672 | { |
3f9c735e | 2673 | const char *name = symp->name; |
3c3bdf30 NC |
2674 | struct mmo_symbol_trie *trie = rootp; |
2675 | struct mmo_symbol_trie **triep = NULL; | |
2676 | ||
2677 | while (*name && trie != NULL) | |
2678 | { | |
2679 | if (*name < trie->symchar) | |
2680 | { | |
2681 | triep = &trie->left; | |
2682 | trie = trie->left; | |
2683 | } | |
2684 | else if (*name > trie->symchar) | |
2685 | { | |
2686 | triep = &trie->right; | |
2687 | trie = trie->right; | |
2688 | } | |
2689 | else if (*name == trie->symchar) | |
2690 | { | |
2691 | triep = &trie->middle; | |
2692 | name++; | |
2693 | ||
2694 | /* Make sure "trie" points to where we should fill in the | |
2695 | current symbol whenever we've iterated through "name". We | |
2696 | would lose the right position if we encounter "foobar" then | |
2697 | "foo". */ | |
2698 | if (*name) | |
2699 | trie = trie->middle; | |
2700 | } | |
2701 | } | |
2702 | ||
2703 | while (*name != 0) | |
2704 | { | |
2705 | /* Create middle branches for the rest of the characters. */ | |
2706 | trie = bfd_zalloc (abfd, sizeof (struct mmo_symbol_trie)); | |
2707 | *triep = trie; | |
2708 | trie->symchar = *name++; | |
2709 | triep = &trie->middle; | |
2710 | } | |
2711 | ||
2712 | /* We discover a duplicate symbol rather late in the process, but still; | |
2713 | we discover it and bail out. */ | |
2714 | if (trie->sym.name != NULL) | |
2715 | { | |
2716 | (*_bfd_error_handler) | |
2717 | (_("%s: invalid symbol table: duplicate symbol `%s'\n"), | |
2718 | bfd_get_filename (abfd), trie->sym.name); | |
2719 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2720 | return FALSE; |
3c3bdf30 NC |
2721 | } |
2722 | ||
2723 | memcpy (&trie->sym, symp, sizeof *symp); | |
b34976b6 | 2724 | return TRUE; |
3c3bdf30 NC |
2725 | } |
2726 | ||
2727 | /* Find out the length of the serialized version of a trie in bytes. */ | |
2728 | ||
2729 | static unsigned int | |
278b4623 | 2730 | mmo_internal_3_length (bfd *abfd, struct mmo_symbol_trie *trie) |
3c3bdf30 NC |
2731 | { |
2732 | /* First, one for the control byte. */ | |
2733 | unsigned int length = 1; | |
2734 | ||
2735 | if (trie == NULL) | |
2736 | return 0; | |
2737 | ||
2738 | /* Add in the recursion to the left. */ | |
2739 | length += mmo_internal_3_length (abfd, trie->left); | |
2740 | ||
2741 | /* Add in the middle trie and the character. */ | |
2742 | length += 1 + mmo_internal_3_length (abfd, trie->middle); | |
2743 | ||
2744 | /* Add in the recursion to the right. */ | |
2745 | length += mmo_internal_3_length (abfd, trie->right); | |
2746 | ||
2747 | /* Add in bytes for the symbol (if this is an endnode). */ | |
2748 | if (trie->sym.name != NULL) | |
2749 | { | |
2750 | unsigned int serno = trie->sym.serno; | |
2751 | ||
2752 | /* First what it takes to encode the value. */ | |
2753 | if (trie->sym.sym_type == mmo_reg_sym) | |
2754 | length++; | |
2755 | else if (trie->sym.sym_type == mmo_undef_sym) | |
2756 | length += 2; | |
2757 | else | |
2758 | { | |
2759 | bfd_vma value = trie->sym.value; | |
2760 | ||
2761 | /* Coded in one to eight following bytes. */ | |
2762 | if (trie->sym.sym_type == mmo_data_sym) | |
2763 | value -= (bfd_vma) 0x20 << 56; | |
2764 | ||
2765 | do | |
2766 | { | |
2767 | value >>= 8; | |
2768 | length++; | |
2769 | } | |
2770 | while (value != 0); | |
2771 | } | |
2772 | ||
2773 | /* Find out what it takes to encode the serial number. */ | |
2774 | do | |
2775 | { | |
2776 | serno >>= 7; | |
2777 | length++; | |
2778 | } | |
2779 | while (serno != 0); | |
2780 | } | |
2781 | ||
2782 | return length; | |
2783 | } | |
2784 | ||
2785 | /* Helper function for outputting the serial number of a symbol, output as | |
2786 | a variant of leb128 (see dwarf2 documentation) which could be called | |
2787 | beb128. Using a helper function and recursion simplifies debugging. */ | |
2788 | ||
2789 | static void | |
278b4623 | 2790 | mmo_beb128_out (bfd *abfd, int serno, int marker) |
3c3bdf30 NC |
2791 | { |
2792 | if (serno & ~0x7f) | |
2793 | mmo_beb128_out (abfd, serno >> 7, 0); | |
2794 | mmo_write_byte (abfd, marker | (serno & 0x7f)); | |
2795 | } | |
2796 | ||
2797 | /* Serialize a trie. */ | |
2798 | ||
2799 | static void | |
278b4623 | 2800 | mmo_internal_3_dump (bfd *abfd, struct mmo_symbol_trie *trie) |
3c3bdf30 NC |
2801 | { |
2802 | bfd_byte control = 0; | |
2803 | ||
2804 | if (trie == NULL) | |
2805 | return; | |
2806 | ||
2807 | if (trie->left) | |
2808 | control |= MMO3_LEFT; | |
2809 | ||
2810 | if (trie->middle) | |
2811 | control |= MMO3_MIDDLE; | |
2812 | ||
2813 | if (trie->right) | |
2814 | control |= MMO3_RIGHT; | |
2815 | ||
2816 | if (trie->sym.name != NULL) | |
2817 | { | |
2818 | /* Encode the symbol type and length of value bytes. */ | |
2819 | if (trie->sym.sym_type == mmo_reg_sym) | |
2820 | control |= MMO3_REGQUAL_BITS; | |
2821 | else if (trie->sym.sym_type == mmo_undef_sym) | |
2822 | control |= MMO3_UNDEF; | |
2823 | else | |
2824 | { | |
2825 | bfd_vma value = trie->sym.value; | |
2826 | ||
2827 | /* Coded in 1..8 following bytes. */ | |
2828 | if (trie->sym.sym_type == mmo_data_sym) | |
2829 | { | |
2830 | control |= MMO3_DATA; | |
2831 | value -= (bfd_vma) 0x20 << 56; | |
2832 | } | |
2833 | ||
2834 | do | |
2835 | { | |
2836 | value >>= 8; | |
2837 | control++; | |
2838 | } | |
2839 | while (value != 0); | |
2840 | } | |
2841 | } | |
2842 | ||
2843 | /* The control byte is output before recursing. */ | |
2844 | mmo_write_byte (abfd, control); | |
2845 | ||
2846 | mmo_internal_3_dump (abfd, trie->left); | |
2847 | ||
2848 | if (control & MMO3_SYMBITS) | |
2849 | { | |
2850 | mmo_write_byte (abfd, trie->symchar); | |
2851 | ||
2852 | if (trie->sym.name != NULL) | |
2853 | { | |
2854 | if (trie->sym.sym_type == mmo_reg_sym) | |
2855 | mmo_write_byte (abfd, trie->sym.value); | |
2856 | else if (trie->sym.sym_type == mmo_undef_sym) | |
2857 | { | |
2858 | mmo_write_byte (abfd, 0); | |
2859 | mmo_write_byte (abfd, 0); | |
2860 | } | |
2861 | else | |
2862 | { | |
2863 | bfd_vma value = trie->sym.value; | |
2864 | ||
2865 | bfd_byte byte_n = control & 15; | |
2866 | ||
2867 | /* Coded in 1..8 following bytes. Note that the value is | |
2868 | shifted out big-endian. */ | |
2869 | if (trie->sym.sym_type == mmo_data_sym) | |
2870 | { | |
2871 | value -= (bfd_vma) 0x20 << 56; | |
2872 | byte_n -= 8; | |
2873 | } | |
2874 | ||
2875 | do | |
2876 | { | |
2877 | mmo_write_byte (abfd, (value >> ((byte_n - 1) * 8)) & 0xff); | |
2878 | byte_n--; | |
2879 | } | |
2880 | while (byte_n != 0); | |
2881 | } | |
2882 | ||
2883 | mmo_beb128_out (abfd, trie->sym.serno, 128); | |
2884 | } | |
2885 | mmo_internal_3_dump (abfd, trie->middle); | |
2886 | } | |
2887 | mmo_internal_3_dump (abfd, trie->right); | |
2888 | } | |
2889 | ||
dfa36a69 | 2890 | /* Write symbols in mmo format. Also write the lop_end terminator. */ |
3c3bdf30 | 2891 | |
b34976b6 | 2892 | static bfd_boolean |
278b4623 | 2893 | mmo_write_symbols_and_terminator (bfd *abfd) |
3c3bdf30 NC |
2894 | { |
2895 | int count = bfd_get_symcount (abfd); | |
3c3bdf30 | 2896 | asymbol **table; |
dfa36a69 HPN |
2897 | asymbol **orig_table = bfd_get_outsymbols (abfd); |
2898 | int serno; | |
3c3bdf30 NC |
2899 | struct mmo_symbol_trie root; |
2900 | int trie_len; | |
2901 | int i; | |
2902 | bfd_byte buf[4]; | |
2903 | ||
2904 | /* Create a symbol for "Main". */ | |
dfa36a69 | 2905 | asymbol *fakemain = bfd_make_empty_symbol (abfd); |
3c3bdf30 | 2906 | |
dfa36a69 HPN |
2907 | fakemain->flags = BSF_GLOBAL; |
2908 | fakemain->value = bfd_get_start_address (abfd); | |
2909 | fakemain->name = MMIX_START_SYMBOL_NAME; | |
2910 | fakemain->section = bfd_abs_section_ptr; | |
3c3bdf30 NC |
2911 | |
2912 | memset (&root, 0, sizeof (root)); | |
2913 | ||
2914 | /* Make all symbols take a left turn. */ | |
2915 | root.symchar = 0xff; | |
2916 | ||
dfa36a69 HPN |
2917 | /* There must always be a ":Main", so we'll add one if there are no |
2918 | symbols. Make sure we have room for it. */ | |
2919 | table = bfd_alloc (abfd, (count + 1) * sizeof (asymbol *)); | |
2920 | if (table == NULL) | |
b34976b6 | 2921 | return FALSE; |
dfa36a69 HPN |
2922 | |
2923 | memcpy (table, orig_table, count * sizeof (asymbol *)); | |
2924 | ||
2925 | /* Move :Main (if there is one) to the first position. This is | |
2926 | necessary to get the same layout of the trie-tree when linking as | |
2927 | when objcopying the result as in the objcopy.exp test "simple objcopy | |
2928 | of executable". It also automatically takes care of assigning serial | |
2929 | number 1 to :Main (as is mandatory). */ | |
2930 | for (i = 0; i < count; i++) | |
2931 | if (table[i] != NULL | |
2932 | && strcmp (table[i]->name, MMIX_START_SYMBOL_NAME) == 0 | |
2933 | && (table[i]->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL) | |
2934 | { | |
2935 | asymbol *mainsym = table[i]; | |
f9c62303 HPN |
2936 | bfd_vma mainvalue |
2937 | = (mainsym->value | |
2938 | + mainsym->section->output_section->vma | |
2939 | + mainsym->section->output_offset); | |
c287bfe4 | 2940 | memcpy (table + 1, orig_table, i * sizeof (asymbol *)); |
dfa36a69 HPN |
2941 | table[0] = mainsym; |
2942 | ||
2943 | /* Check that the value assigned to :Main is the same as the entry | |
2944 | address. The default linker script asserts this. This is as | |
2945 | good a place as any to check this consistency. */ | |
c287bfe4 HPN |
2946 | if (mainvalue != bfd_get_start_address (abfd) |
2947 | && !mmo_ignore_symbol_consistency (abfd)) | |
dfa36a69 HPN |
2948 | { |
2949 | /* Arbitrary buffer to hold the printable representation of a | |
2950 | vma. */ | |
2951 | char vmas_main[40]; | |
2952 | char vmas_start[40]; | |
2953 | bfd_vma vma_start = bfd_get_start_address (abfd); | |
2954 | ||
f9c62303 | 2955 | sprintf_vma (vmas_main, mainvalue); |
dfa36a69 HPN |
2956 | sprintf_vma (vmas_start, vma_start); |
2957 | ||
2958 | (*_bfd_error_handler) | |
278b4623 HPN |
2959 | (_("%s: Bad symbol definition: `Main' set to %s rather" |
2960 | " than the start address %s\n"), | |
dfa36a69 HPN |
2961 | bfd_get_filename (abfd), vmas_main, vmas_start); |
2962 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2963 | return FALSE; |
dfa36a69 HPN |
2964 | } |
2965 | break; | |
2966 | } | |
2967 | if (i == count && count != 0) | |
3c3bdf30 | 2968 | { |
dfa36a69 HPN |
2969 | /* When there are symbols, there must be a :Main. There was no |
2970 | :Main, so we need to add it manually. */ | |
2971 | memcpy (table + 1, orig_table, count * sizeof (asymbol *)); | |
2972 | table[0] = fakemain; | |
2973 | count++; | |
3c3bdf30 | 2974 | } |
3c3bdf30 | 2975 | |
11509220 HPN |
2976 | /* Don't bother inspecting symbols in plugin dummy objects; their |
2977 | symbols aren't fully inspectable. */ | |
2978 | if ((abfd->flags & BFD_PLUGIN) == 0) | |
3c3bdf30 | 2979 | { |
11509220 HPN |
2980 | for (i = 0, serno = 1; i < count && table[i] != NULL; i++) |
2981 | { | |
2982 | asymbol *s = table[i]; | |
3c3bdf30 | 2983 | |
11509220 HPN |
2984 | /* It's not enough to consult bfd_is_local_label, since it does not |
2985 | mean "local" in the sense of linkable-and-observable-after-link. | |
2986 | Let's just check the BSF_GLOBAL flag. | |
3c3bdf30 | 2987 | |
11509220 HPN |
2988 | Also, don't export symbols with characters not in the |
2989 | allowed set. */ | |
2990 | if ((s->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL | |
2991 | && strspn (s->name, | |
2992 | valid_mmo_symbol_character_set) == strlen (s->name)) | |
3c3bdf30 | 2993 | { |
11509220 HPN |
2994 | struct mmo_symbol sym; |
2995 | memset (&sym, 0, sizeof (sym)); | |
2996 | ||
2997 | /* Need to strip const here; strdup:ing would leak and the | |
2998 | existing string must be safe to reuse. */ | |
2999 | sym.name = (char *) s->name; | |
3000 | sym.value = | |
3001 | s->value | |
3002 | + s->section->output_section->vma | |
3003 | + s->section->output_offset; | |
3004 | ||
3005 | if (bfd_is_und_section (s->section)) | |
3006 | sym.sym_type = mmo_undef_sym; | |
3007 | else if (strcmp (s->section->name, MMO_DATA_SECTION_NAME) == 0 | |
3008 | /* The encoding of data symbols require that the "rest" | |
3009 | of the value fits in 6 bytes, so the upper two bytes | |
3010 | must be 0x2000. All other symbols get to be the | |
3011 | absolute type. */ | |
3012 | && (sym.value >> 48) == 0x2000) | |
3013 | sym.sym_type = mmo_data_sym; | |
3014 | else if (strcmp (s->section->name, MMIX_REG_SECTION_NAME) == 0) | |
3015 | sym.sym_type = mmo_reg_sym; | |
3016 | else if (strcmp (s->section->name, | |
3017 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
3018 | { | |
3019 | sym.sym_type = mmo_reg_sym; | |
3020 | sym.value /= 8; | |
3021 | } | |
3022 | else | |
3023 | sym.sym_type = mmo_abs_sym; | |
3c3bdf30 | 3024 | |
11509220 HPN |
3025 | /* FIXME: We assume the order of the received symbols is an |
3026 | ordered mapping of the serial numbers. This is not | |
3027 | necessarily true if we e.g. objcopy a mmo file to another and | |
3028 | there are gaps in the numbering. Not sure if this can | |
3029 | happen. Not sure what to do. */ | |
3030 | sym.serno = serno++; | |
3c3bdf30 | 3031 | |
11509220 HPN |
3032 | if (! mmo_internal_add_3_sym (abfd, &root, &sym)) |
3033 | return FALSE; | |
3034 | } | |
3c3bdf30 NC |
3035 | } |
3036 | } | |
3037 | ||
3038 | /* Change the root node to be a ":"-prefix. */ | |
3039 | root.symchar = ':'; | |
3040 | root.middle = root.left; | |
3041 | root.right = NULL; | |
3042 | root.left = NULL; | |
3043 | ||
3044 | /* We have to find out if we can fit the whole symbol table in the mmo | |
3045 | symtab. It would be bad to assume we can always fit it in 262144 | |
3046 | bytes. If we can't, just leave the Main symbol. */ | |
3047 | trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; | |
3048 | ||
3049 | if (trie_len > 0xffff) | |
3050 | { | |
3051 | /* Test this code by using a lower limit in the test above and check | |
3052 | that the single "Main" symbol is emitted and handled properly. | |
3053 | There's no specific test-case. */ | |
3054 | struct mmo_symbol sym; | |
3055 | ||
3056 | (*_bfd_error_handler) | |
278b4623 HPN |
3057 | (_("%s: warning: symbol table too large for mmo, larger than 65535" |
3058 | " 32-bit words: %d. Only `Main' will be emitted.\n"), | |
3c3bdf30 NC |
3059 | bfd_get_filename (abfd), trie_len); |
3060 | ||
3061 | memset (&sym, 0, sizeof (sym)); | |
3062 | sym.sym_type = mmo_abs_sym; | |
3063 | sym.name = MMIX_START_SYMBOL_NAME; | |
3064 | sym.serno = 1; | |
3065 | sym.value = bfd_get_start_address (abfd); | |
3066 | ||
3067 | /* Then patch up a symbol table to be just the ":Main" symbol. */ | |
3068 | memset (&root, 0, sizeof (root)); | |
3069 | root.left = root.middle; | |
3070 | root.symchar = 0xff; | |
3071 | root.middle = NULL; | |
3072 | root.right = NULL; | |
3073 | ||
3074 | if (! mmo_internal_add_3_sym (abfd, &root, &sym)) | |
b34976b6 | 3075 | return FALSE; |
3c3bdf30 NC |
3076 | |
3077 | root.symchar = ':'; | |
3078 | root.middle = root.left; | |
3079 | root.right = NULL; | |
3080 | root.left = NULL; | |
3081 | ||
3082 | trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; | |
3083 | } | |
3084 | ||
3085 | /* Reset the written-bytes counter. */ | |
3086 | abfd->tdata.mmo_data->byte_no = 0; | |
3087 | ||
3088 | /* Put out the lop_stab mark. */ | |
3089 | bfd_put_32 (abfd, (LOP << 24) | (LOP_STAB << 16), buf); | |
3090 | if (bfd_bwrite (buf, 4, abfd) != 4) | |
b34976b6 | 3091 | return FALSE; |
3c3bdf30 NC |
3092 | |
3093 | /* Dump out symbols. */ | |
3094 | mmo_internal_3_dump (abfd, &root); | |
3095 | ||
3096 | if (trie_len != (abfd->tdata.mmo_data->byte_no + 3)/4) | |
3097 | { | |
3098 | /* I haven't seen this trig. It seems no use claiming this case | |
3099 | isn't debugged and abort if we get here. Instead emit a | |
3100 | diagnostic and fail "normally". */ | |
3101 | (*_bfd_error_handler) | |
278b4623 HPN |
3102 | (_("%s: internal error, symbol table changed size from %d to %d" |
3103 | " words\n"), | |
3c3bdf30 NC |
3104 | bfd_get_filename (abfd), trie_len, |
3105 | (abfd->tdata.mmo_data->byte_no + 3)/4); | |
3106 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3107 | return FALSE; |
3c3bdf30 NC |
3108 | } |
3109 | ||
3110 | /* Dump out remaining bytes in the buffer and handle I/O errors by | |
3111 | propagating errors. */ | |
3112 | if ((abfd->tdata.mmo_data->byte_no % 4) != 0 | |
3113 | || abfd->tdata.mmo_data->have_error) | |
3114 | { | |
3115 | memset (abfd->tdata.mmo_data->buf + (abfd->tdata.mmo_data->byte_no % 4), | |
3116 | 0, 4 - (abfd->tdata.mmo_data->byte_no % 4)); | |
3117 | ||
3118 | if (abfd->tdata.mmo_data->have_error | |
3119 | || bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) | |
b34976b6 | 3120 | return FALSE; |
3c3bdf30 NC |
3121 | } |
3122 | ||
3123 | bfd_put_32 (abfd, (LOP << 24) | (LOP_END << 16) | trie_len, buf); | |
3124 | return bfd_bwrite (buf, 4, abfd) == 4; | |
3125 | } | |
3126 | ||
3127 | /* Write section unless it is the register contents section. For that, we | |
3128 | instead store the section in the supplied pointer. This function is | |
3129 | used through bfd_map_over_sections. */ | |
3130 | ||
3131 | static void | |
278b4623 | 3132 | mmo_write_section_unless_reg_contents (bfd *abfd, asection *sec, void *p) |
3c3bdf30 NC |
3133 | { |
3134 | struct mmo_write_sec_info *infop = (struct mmo_write_sec_info *) p; | |
3135 | ||
82e51918 | 3136 | if (! infop->retval) |
3c3bdf30 NC |
3137 | return; |
3138 | ||
3139 | if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
3140 | { | |
3141 | infop->reg_section = sec; | |
3142 | return; | |
3143 | } | |
3144 | ||
3145 | /* Exclude the convenience register section. */ | |
3146 | if (strcmp (sec->name, MMIX_REG_SECTION_NAME) == 0) | |
3147 | { | |
3148 | if (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) | |
3149 | { | |
3150 | /* Make sure it hasn't got contents. It seems impossible to | |
3151 | make it carry contents, so we don't have a test-case for | |
3152 | this. */ | |
3153 | (*_bfd_error_handler) | |
278b4623 HPN |
3154 | (_("%s: internal error, internal register section %s had" |
3155 | " contents\n"), | |
3c3bdf30 NC |
3156 | bfd_get_filename (abfd), sec->name); |
3157 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3158 | infop->retval = FALSE; |
3c3bdf30 NC |
3159 | return; |
3160 | } | |
3161 | ||
3162 | return; | |
3163 | } | |
3164 | ||
3165 | infop->retval = mmo_internal_write_section (abfd, sec); | |
3166 | } | |
3167 | ||
3168 | /* Do the actual output of a file. Assumes mmo_set_section_contents is | |
3169 | already called. */ | |
3170 | ||
b34976b6 | 3171 | static bfd_boolean |
278b4623 | 3172 | mmo_write_object_contents (bfd *abfd) |
3c3bdf30 NC |
3173 | { |
3174 | struct mmo_write_sec_info wsecinfo; | |
3175 | ||
3176 | /* First, there are a few words of preamble. */ | |
3177 | if (! mmo_internal_write_header (abfd)) | |
b34976b6 | 3178 | return FALSE; |
3c3bdf30 NC |
3179 | |
3180 | wsecinfo.reg_section = NULL; | |
b34976b6 | 3181 | wsecinfo.retval = TRUE; |
3c3bdf30 NC |
3182 | |
3183 | bfd_map_over_sections (abfd, mmo_write_section_unless_reg_contents, | |
278b4623 | 3184 | &wsecinfo); |
3c3bdf30 | 3185 | |
82e51918 | 3186 | if (! wsecinfo.retval) |
b34976b6 | 3187 | return FALSE; |
3c3bdf30 NC |
3188 | |
3189 | if (wsecinfo.reg_section != NULL) | |
3190 | { | |
3191 | asection *sec = wsecinfo.reg_section; | |
3192 | unsigned int z = (unsigned int) (sec->vma / 8); | |
3193 | ||
3194 | /* Registers 0..31 must not be global. Do sanity check on the "vma" | |
3195 | of the register contents section and check that it corresponds to | |
3196 | the length of the section. */ | |
3197 | if (z < 32 || z >= 255 || (sec->vma & 7) != 0 | |
eea6121a | 3198 | || sec->vma != 256 * 8 - sec->size - 8) |
3c3bdf30 NC |
3199 | { |
3200 | bfd_set_error (bfd_error_bad_value); | |
3201 | ||
eea6121a | 3202 | if (sec->size == 0) |
3c3bdf30 NC |
3203 | /* There must always be at least one such register. */ |
3204 | (*_bfd_error_handler) | |
3205 | (_("%s: no initialized registers; section length 0\n"), | |
3206 | bfd_get_filename (abfd)); | |
3207 | else if (sec->vma > (256 - 32) * 8) | |
3208 | /* Provide better error message for the case of too many | |
3209 | global registers. */ | |
3210 | (*_bfd_error_handler) | |
3211 | (_("%s: too many initialized registers; section length %ld\n"), | |
3212 | bfd_get_filename (abfd), | |
eea6121a | 3213 | (long) sec->size); |
3c3bdf30 NC |
3214 | else |
3215 | (*_bfd_error_handler) | |
278b4623 HPN |
3216 | (_("%s: invalid start address for initialized registers of" |
3217 | " length %ld: 0x%lx%08lx\n"), | |
3c3bdf30 | 3218 | bfd_get_filename (abfd), |
eea6121a | 3219 | (long) sec->size, |
3c3bdf30 NC |
3220 | (unsigned long) (sec->vma >> 32), (unsigned long) (sec->vma)); |
3221 | ||
b34976b6 | 3222 | return FALSE; |
3c3bdf30 NC |
3223 | } |
3224 | ||
3225 | if (! mmo_internal_write_post (abfd, z, sec)) | |
b34976b6 | 3226 | return FALSE; |
3c3bdf30 NC |
3227 | } |
3228 | else | |
3229 | if (! mmo_internal_write_post (abfd, 255, NULL)) | |
b34976b6 | 3230 | return FALSE; |
3c3bdf30 NC |
3231 | |
3232 | return mmo_write_symbols_and_terminator (abfd); | |
3233 | } | |
3234 | ||
3c3bdf30 NC |
3235 | /* If there's anything in particular in a mmo bfd that we want to free, |
3236 | make this a real function. Only do this if you see major memory | |
3237 | thrashing; zealous free:ing will cause unwanted behavior, especially if | |
3238 | you "free" memory allocated with "bfd_alloc", or even "bfd_release" a | |
3239 | block allocated with "bfd_alloc"; they're really allocated from an | |
3240 | obstack, and we don't know what was allocated there since this | |
3241 | particular allocation. */ | |
3242 | ||
3243 | #define mmo_close_and_cleanup _bfd_generic_close_and_cleanup | |
3244 | #define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info | |
3245 | ||
3246 | /* Perhaps we need to adjust this one; mmo labels (originally) without a | |
3247 | leading ':' might more appropriately be called local. */ | |
3248 | #define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name | |
3c9458e9 NC |
3249 | #define mmo_bfd_is_target_special_symbol \ |
3250 | ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) | |
3c3bdf30 | 3251 | |
60bb06bc L |
3252 | #define mmo_get_symbol_version_string \ |
3253 | _bfd_nosymbols_get_symbol_version_string | |
3254 | ||
3c3bdf30 NC |
3255 | /* Is this one really used or defined by anyone? */ |
3256 | #define mmo_get_lineno _bfd_nosymbols_get_lineno | |
3257 | ||
3258 | /* FIXME: We can do better on this one, if we have a dwarf2 .debug_line | |
3259 | section or if MMO line numbers are implemented. */ | |
3260 | #define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line | |
9c461f7d | 3261 | #define mmo_find_line _bfd_nosymbols_find_line |
4ab527b0 | 3262 | #define mmo_find_inliner_info _bfd_nosymbols_find_inliner_info |
3f3c5c34 | 3263 | #define mmo_make_empty_symbol _bfd_generic_make_empty_symbol |
3c3bdf30 NC |
3264 | #define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol |
3265 | #define mmo_read_minisymbols _bfd_generic_read_minisymbols | |
3266 | #define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol | |
3267 | ||
3268 | #define mmo_get_section_contents_in_window \ | |
3269 | _bfd_generic_get_section_contents_in_window | |
3270 | #define mmo_bfd_get_relocated_section_contents \ | |
3271 | bfd_generic_get_relocated_section_contents | |
3272 | #define mmo_bfd_gc_sections bfd_generic_gc_sections | |
ae17ab41 | 3273 | #define mmo_bfd_lookup_section_flags bfd_generic_lookup_section_flags |
3c3bdf30 NC |
3274 | #define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create |
3275 | #define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols | |
2d653fc7 | 3276 | #define mmo_bfd_link_just_syms _bfd_generic_link_just_syms |
1338dd10 PB |
3277 | #define mmo_bfd_copy_link_hash_symbol_type \ |
3278 | _bfd_generic_copy_link_hash_symbol_type | |
3c3bdf30 NC |
3279 | #define mmo_bfd_final_link _bfd_generic_final_link |
3280 | #define mmo_bfd_link_split_section _bfd_generic_link_split_section | |
4f3b23b3 | 3281 | #define mmo_bfd_link_check_relocs _bfd_generic_link_check_relocs |
3c3bdf30 NC |
3282 | |
3283 | /* Strictly speaking, only MMIX uses this restricted format, but let's not | |
3284 | stop anybody from shooting themselves in the foot. */ | |
3285 | #define mmo_set_arch_mach bfd_default_set_arch_mach | |
3286 | #define mmo_bfd_relax_section bfd_generic_relax_section | |
3287 | #define mmo_bfd_merge_sections bfd_generic_merge_sections | |
72adc230 | 3288 | #define mmo_bfd_is_group_section bfd_generic_is_group_section |
e61463e1 | 3289 | #define mmo_bfd_discard_group bfd_generic_discard_group |
082b7297 L |
3290 | #define mmo_section_already_linked \ |
3291 | _bfd_generic_section_already_linked | |
3023e3f6 | 3292 | #define mmo_bfd_define_common_symbol bfd_generic_define_common_symbol |
3c3bdf30 | 3293 | |
3c3bdf30 NC |
3294 | /* We want to copy time of creation, otherwise we'd use |
3295 | BFD_JUMP_TABLE_COPY (_bfd_generic). */ | |
3296 | #define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data | |
3297 | #define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data | |
3298 | #define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data | |
80fccad2 | 3299 | #define mmo_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data |
3c3bdf30 NC |
3300 | #define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags |
3301 | #define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data | |
3302 | ||
6d00b590 | 3303 | const bfd_target mmix_mmo_vec = |
3c3bdf30 NC |
3304 | { |
3305 | "mmo", /* name */ | |
3306 | bfd_target_mmo_flavour, | |
3307 | BFD_ENDIAN_BIG, /* target byte order */ | |
3308 | BFD_ENDIAN_BIG, /* target headers byte order */ | |
3309 | ||
3310 | /* FIXME: Might need adjustments. */ | |
3311 | (HAS_RELOC | EXEC_P | /* object flags */ | |
3312 | HAS_LINENO | HAS_DEBUG | | |
3313 | HAS_SYMS | HAS_LOCALS | WP_TEXT), | |
3314 | ||
3315 | /* FIXME: Might need adjustments. */ | |
3316 | (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | |
3317 | | SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY), | |
3318 | /* section flags */ | |
3319 | 0, /* leading underscore */ | |
3320 | ' ', /* ar_pad_char */ | |
3321 | 16, /* ar_max_namelen */ | |
0aabe54e | 3322 | 0, /* match priority. */ |
3c3bdf30 NC |
3323 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
3324 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
3325 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ | |
3326 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
3327 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
3328 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
3329 | ||
3330 | { | |
3331 | _bfd_dummy_target, | |
3332 | mmo_object_p, /* bfd_check_format */ | |
3333 | _bfd_dummy_target, | |
3334 | _bfd_dummy_target, | |
3335 | }, | |
3336 | { | |
3337 | bfd_false, | |
3338 | mmo_mkobject, | |
3339 | bfd_false, | |
3340 | bfd_false, | |
3341 | }, | |
3342 | { /* bfd_write_contents */ | |
3343 | bfd_false, | |
3344 | mmo_write_object_contents, | |
3345 | bfd_false, | |
3346 | bfd_false, | |
3347 | }, | |
3348 | ||
3349 | BFD_JUMP_TABLE_GENERIC (mmo), | |
3350 | BFD_JUMP_TABLE_COPY (mmo), | |
3351 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
3352 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
3353 | BFD_JUMP_TABLE_SYMBOLS (mmo), | |
72f6ea61 | 3354 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), |
3c3bdf30 NC |
3355 | BFD_JUMP_TABLE_WRITE (mmo), |
3356 | BFD_JUMP_TABLE_LINK (mmo), | |
3357 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
3358 | ||
3359 | NULL, | |
3360 | ||
3361 | NULL | |
3362 | }; |