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3c3bdf30 1/* BFD back-end for mmo objects (MMIX-specific object-format).
3f3c5c34 2 Copyright 2001, 2002
3c3bdf30
NC		 3 Free Software Foundation, Inc.
4 Written by Hans-Peter Nilsson ([email protected]).
5 Infrastructure and other bits originally copied from srec.c and
6 binary.c.
7
8This file is part of BFD, the Binary File Descriptor library.
9
10This program is free software; you can redistribute it and/or modify
11it under the terms of the GNU General Public License as published by
12the Free Software Foundation; either version 2 of the License, or
13(at your option) any later version.
14
15This program is distributed in the hope that it will be useful,
16but WITHOUT ANY WARRANTY; without even the implied warranty of
17MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18GNU General Public License for more details.
19
20You should have received a copy of the GNU General Public License
21along with this program; if not, write to the Free Software
22Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23
24/*
25SECTION
26 mmo backend
27
28 The mmo object format is used exclusively together with Professor
29 Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator
6eeb40b2
HPN		 30 @command{mmix} which is available at
31 @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz}
3c3bdf30 32 understands this format. That package also includes a combined
6eeb40b2 33 assembler and linker called @command{mmixal}. The mmo format has
3c3bdf30
NC		 34 no advantages feature-wise compared to e.g. ELF. It is a simple
35 non-relocatable object format with no support for archives or
36 debugging information, except for symbol value information and
37 line numbers (which is not yet implemented in BFD). See
6eeb40b2 38 @url{http://www-cs-faculty.stanford.edu/~knuth/mmix.html} for more
3c3bdf30
NC		 39 information about MMIX. The ELF format is used for intermediate
40 object files in the BFD implementation.
41
42@c We want to xref the symbol table node. A feature in "chew"
43@c requires that "commands" do not contain spaces in the
44@c arguments. Hence the hyphen in "Symbol-table".
45@menu
46@* File layout::
47@* Symbol-table::
48@* mmo section mapping::
49@end menu
50
51INODE
52File layout, Symbol-table, mmo, mmo
53SUBSECTION
54 File layout
55
56 The mmo file contents is not partitioned into named sections as
57 with e.g.@: ELF. Memory areas is formed by specifying the
58 location of the data that follows. Only the memory area
59 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so
60 it is used for code (and constants) and the area
61 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for
62 writable data. @xref{mmo section mapping}.
63
64 Contents is entered as 32-bit words, xor:ed over previous
65 contents, always zero-initialized. A word that starts with the
66 byte @samp{0x98} forms a command called a @samp{lopcode}, where
67 the next byte distinguished between the thirteen lopcodes. The
68 two remaining bytes, called the @samp{Y} and @samp{Z} fields, or
69 the @samp{YZ} field (a 16-bit big-endian number), are used for
70 various purposes different for each lopcode. As documented in
6eeb40b2 71 @url{http://www-cs-faculty.stanford.edu/~knuth/mmixal-intro.ps.gz},
3c3bdf30
NC		 72 the lopcodes are:
73
74 There is provision for specifying ``special data'' of 65536
75 different types. We use type 80 (decimal), arbitrarily chosen the
76 same as the ELF <<e_machine>> number for MMIX, filling it with
77 section information normally found in ELF objects. @xref{mmo
78 section mapping}.
79
80 @table @code
81 @item lop_quote
82 0x98000001. The next word is contents, regardless of whether it
83 starts with 0x98 or not.
84
85 @item lop_loc
86 0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location
87 directive, setting the location for the next data to the next
88 32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}),
89 plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment
90 and 2 for the data segment.
91
92 @item lop_skip
93 0x9802YYZZ. Increase the current location by @samp{YZ} bytes.
94
95 @item lop_fixo
96 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location
97 as 64 bits into the location pointed to by the next 32-bit
98 (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y *
99 2^56}.
100
101 @item lop_fixr
102 0x9804YYZZ. @samp{YZ} is stored into the current location plus
103 @math{2 - 4 * YZ}.
104
105 @item lop_fixrx
106 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from
107 the following 32-bit word are used in a manner similar to
108 @samp{YZ} in lop_fixr: it is xor:ed into the current location
109 minus @math{4 * L}. The first byte of the word is 0 or 1. If it
110 is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0,
111 then @math{L = (@var{lowest 24 bits of word})}.
112
113 @item lop_file
114 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of
115 32-bit words. Set the file number to @samp{Y} and the line
116 counter to 0. The next @math{Z * 4} bytes contain the file name,
117 padded with zeros if the count is not a multiple of four. The
118 same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for
119 all but the first occurrence.
120
121 @item lop_line
122 0x9807YYZZ. @samp{YZ} is the line number. Together with
123 lop_file, it forms the source location for the next 32-bit word.
124 Note that for each non-lopcode 32-bit word, line numbers are
125 assumed incremented by one.
126
127 @item lop_spec
128 0x9808YYZZ. @samp{YZ} is the type number. Data until the next
129 lopcode other than lop_quote forms special data of type @samp{YZ}.
130 @xref{mmo section mapping}.
131
132 Other types than 80, (or type 80 with a content that does not
133 parse) is stored in sections named <<.MMIX.spec_data.@var{n}>>
134 where @var{n} is the @samp{YZ}-type. The flags for such a
135 sections say not to allocate or load the data. The vma is 0.
136 Contents of multiple occurrences of special data @var{n} is
137 concatenated to the data of the previous lop_spec @var{n}s. The
138 location in data or code at which the lop_spec occurred is lost.
139
140 @item lop_pre
141 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the
142 length of header information in 32-bit words, where the first word
143 tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}.
144
145 @item lop_post
146 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all
147 content-generating lopcodes in a program. The @samp{Z} field
148 denotes the value of @samp{rG} at the beginning of the program.
149 The following @math{256 - Z} big-endian 64-bit words are loaded
150 into global registers @samp{$G} @dots{} @samp{$255}.
151
152 @item lop_stab
153 0x980b0000. The next-to-last lopcode in a program. Must follow
154 immediately after the lop_post lopcode and its data. After this
155 lopcode follows all symbols in a compressed format
156 (@pxref{Symbol-table}).
157
158 @item lop_end
159 0x980cYYZZ. The last lopcode in a program. It must follow the
160 lop_stab lopcode and its data. The @samp{YZ} field contains the
161 number of 32-bit words of symbol table information after the
162 preceding lop_stab lopcode.
163 @end table
164
165 Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and
166 <<lop_fixo>> are not generated by BFD, but are handled. They are
167 generated by <<mmixal>>.
168
169EXAMPLE
170 This trivial one-label, one-instruction file:
171
172| :Main TRAP 1,2,3
173
174 can be represented this way in mmo:
175
176| 0x98090101 - lop_pre, one 32-bit word with timestamp.
177| <timestamp>
178| 0x98010002 - lop_loc, text segment, using a 64-bit address.
179| Note that mmixal does not emit this for the file above.
180| 0x00000000 - Address, high 32 bits.
181| 0x00000000 - Address, low 32 bits.
182| 0x98060002 - lop_file, 2 32-bit words for file-name.
183| 0x74657374 - "test"
184| 0x2e730000 - ".s\0\0"
185| 0x98070001 - lop_line, line 1.
186| 0x00010203 - TRAP 1,2,3
187| 0x980a00ff - lop_post, setting $255 to 0.
188| 0x00000000
189| 0x00000000
190| 0x980b0000 - lop_stab for ":Main" = 0, serial 1.
191| 0x203a4040 @xref{Symbol-table}.
192| 0x10404020
193| 0x4d206120
194| 0x69016e00
195| 0x81000000
196| 0x980c0005 - lop_end; symbol table contained five 32-bit words. */
197
198#include "bfd.h"
199#include "sysdep.h"
200#include "libbfd.h"
201#include "libiberty.h"
202#include "elf/mmix.h"
203#include "opcode/mmix.h"
3c3bdf30
NC		 204
205#define LOP 0x98
206#define LOP_QUOTE 0
207#define LOP_LOC 1
208#define LOP_SKIP 2
209#define LOP_FIXO 3
210#define LOP_FIXR 4
211#define LOP_FIXRX 5
212#define LOP_FILE 6
213#define LOP_LINE 7
214#define LOP_SPEC 8
215#define LOP_PRE 9
216#define LOP_POST 10
217#define LOP_STAB 11
218#define LOP_END 12
219
220#define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1)
221#define SPEC_DATA_SECTION 80
222#define LOP_SPEC_SECTION \
223 ((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION)
224
225/* Must be a power of two. If you change this to be >= 64k, you need a
226 new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */
227#define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15)
228
229/* An arbitrary number for the maximum length section name size. */
230#define MAX_SECTION_NAME_SIZE (1024 * 1024)
231
232/* A quite arbitrary number for the maximum length section size. */
233#define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024)
234
235#define MMO3_WCHAR 0x80
236#define MMO3_LEFT 0x40
237#define MMO3_MIDDLE 0x20
238#define MMO3_RIGHT 0x10
239#define MMO3_TYPEBITS 0xf
240#define MMO3_REGQUAL_BITS 0xf
241#define MMO3_UNDEF 2
242#define MMO3_DATA 8
243#define MMO3_SYMBITS 0x2f
244
245/* Put these everywhere in new code. */
246#define FATAL_DEBUG \
247 _bfd_abort (__FILE__, __LINE__, \
248 "Internal: Non-debugged code (test-case missing)")
249
250#define BAD_CASE(x) \
251 _bfd_abort (__FILE__, __LINE__, \
252 "bad case for " #x)
253
254enum mmo_sym_type { mmo_reg_sym, mmo_undef_sym, mmo_data_sym, mmo_abs_sym};
255
256/* When scanning the mmo file, a linked list of mmo_symbol
257 structures is built to represent the symbol table (if there is
258 one). */
259
260struct mmo_symbol
261 {
262 struct mmo_symbol *next;
3f9c735e 263 const char *name;
3c3bdf30
NC		 264 bfd_vma value;
265 enum mmo_sym_type sym_type;
266 unsigned int serno;
267 };
268
269struct mmo_data_list_struct
270 {
271 struct mmo_data_list_struct *next;
272 bfd_vma where;
273 bfd_size_type size;
274 bfd_size_type allocated_size;
275 bfd_byte data[1];
276 };
277
278typedef struct mmo_data_list_struct mmo_data_list_type;
279
280struct mmo_symbol_trie
281 {
282 struct mmo_symbol_trie *left;
283 struct mmo_symbol_trie *right;
284 struct mmo_symbol_trie *middle;
285
286 bfd_byte symchar;
287
288 /* A zero name means there's nothing here. */
289 struct mmo_symbol sym;
290 };
291
292/* The mmo tdata information. */
293
294struct mmo_data_struct
295 {
296 struct mmo_symbol *symbols;
297 struct mmo_symbol *symtail;
298 asymbol *csymbols;
299
300 /* File representation of time (NULL) when this file was created. */
301 bfd_byte created[4];
302
303 /* When we're reading bytes recursively, check this occasionally.
304 Also holds write errors. */
305 boolean have_error;
306
307 /* Max symbol length that may appear in the lop_stab table. Note that
308 this table might just hold a subset of symbols for not-really large
309 programs, as it can only be 65536 * 4 bytes large. */
310 int max_symbol_length;
311
312 /* Here's the symbol we build in lop_stab. */
313 char *lop_stab_symbol;
314
315 /* Index into lop_stab_symbol for the next character when parsing the
316 symbol information. */
317 int symbol_position;
318
319 /* When creating arbitrary sections, we need to count section numbers. */
320 int sec_no;
321
322 /* When writing or reading byte-wise, we need to count the bytes
323 within a 32-bit word. */
324 int byte_no;
325
326 /* We also need a buffer to hold the bytes we count reading or writing. */
327 bfd_byte buf[4];
328 };
329
330typedef struct mmo_data_struct tdata_type;
331
332struct mmo_section_data_struct
333 {
334 mmo_data_list_type *head;
335 mmo_data_list_type *tail;
336 };
337
338/* These structures are used in bfd_map_over_sections constructs. */
339
340/* Used when writing out sections; all but the register contents section
341 which is stored in reg_section. */
342struct mmo_write_sec_info
343 {
344 asection *reg_section;
345 boolean retval;
346 };
347
348/* Used when trying to find a section corresponding to addr. */
349struct mmo_find_sec_info
350 {
351 asection *sec;
352 bfd_vma addr;
353 };
354
355static boolean mmo_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *));
356static void mmo_write_section_unless_reg_contents
357 PARAMS ((bfd *, asection *, PTR));
358static void mmo_find_sec_w_addr PARAMS ((bfd *, asection *, PTR));
359static void mmo_find_sec_w_addr_grow PARAMS ((bfd *, asection *, PTR));
3f9c735e 360static asection *mmo_make_section PARAMS ((bfd *, const char *));
3c3bdf30
NC		 361static void mmo_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *));
362static void mmo_print_symbol
363 PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
364static void mmo_init PARAMS ((void));
365static boolean mmo_mkobject PARAMS ((bfd *));
366static boolean mmo_scan PARAMS ((bfd *));
367static asection *mmo_decide_section PARAMS ((bfd *, bfd_vma));
368static asection *mmo_get_generic_spec_data_section PARAMS ((bfd *, int));
369static asection *mmo_get_spec_section PARAMS ((bfd *, int));
370static INLINE bfd_byte *mmo_get_loc PARAMS ((asection *, bfd_vma, int));
371static void mmo_xore_64 PARAMS ((asection *, bfd_vma vma, bfd_vma value));
372static void mmo_xore_32 PARAMS ((asection *, bfd_vma vma, unsigned int));
373static void mmo_xore_16 PARAMS ((asection *, bfd_vma vma, unsigned int));
3f9c735e 374static const bfd_target *mmo_object_p PARAMS ((bfd *));
3c3bdf30
NC		 375static void mmo_map_set_sizes PARAMS ((bfd *, asection *, PTR));
376static boolean mmo_get_symbols PARAMS ((bfd *));
3f9c735e 377static boolean mmo_create_symbol PARAMS ((bfd *, const char *, bfd_vma,
3c3bdf30
NC		 378 enum mmo_sym_type, unsigned int));
379static boolean mmo_get_section_contents
380 PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
381static long mmo_get_symtab_upper_bound PARAMS ((bfd *));
382static long mmo_get_symtab PARAMS ((bfd *, asymbol **));
3c3bdf30
NC		 383static void mmo_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *));
384static void mmo_print_symbol PARAMS ((bfd *, PTR, asymbol *,
385 bfd_print_symbol_type));
386static boolean mmo_set_section_contents
387 PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
388static int mmo_sizeof_headers PARAMS ((bfd *, boolean));
389static long mmo_get_reloc_upper_bound PARAMS ((bfd *, asection *));
390
391static boolean mmo_internal_write_header PARAMS ((bfd *));
392static boolean mmo_internal_write_post PARAMS ((bfd *, int, asection *));
393static boolean mmo_internal_add_3_sym
3f9c735e 394 PARAMS ((bfd *, struct mmo_symbol_trie *, const struct mmo_symbol *));
3c3bdf30
NC		 395static unsigned int mmo_internal_3_length
396 PARAMS ((bfd *, struct mmo_symbol_trie *));
397static void mmo_internal_3_dump
398 PARAMS ((bfd *, struct mmo_symbol_trie *));
399static void mmo_beb128_out PARAMS ((bfd *, int, int));
400static boolean mmo_internal_write_section
401 PARAMS ((bfd *, asection *));
402static void mmo_write_tetra PARAMS ((bfd *, unsigned int));
403static void mmo_write_tetra_raw PARAMS ((bfd *, unsigned int));
404static void mmo_write_octa PARAMS ((bfd *, bfd_vma));
405static void mmo_write_octa_raw PARAMS ((bfd *, bfd_vma));
406static boolean mmo_write_chunk
3f9c735e 407 PARAMS ((bfd *, const bfd_byte *, unsigned int));
dfa36a69 408static boolean mmo_flush_chunk PARAMS ((bfd *));
3c3bdf30 409static boolean mmo_write_loc_chunk
3f9c735e 410 PARAMS ((bfd *, bfd_vma, const bfd_byte *, unsigned int, bfd_vma *));
3c3bdf30
NC		 411static boolean mmo_write_chunk_list PARAMS ((bfd *, mmo_data_list_type *));
412static boolean mmo_write_loc_chunk_list
413 PARAMS ((bfd *, mmo_data_list_type *));
414static boolean mmo_write_symbols_and_terminator PARAMS ((bfd *));
415static flagword mmo_sec_flags_from_bfd_flags PARAMS ((flagword));
416static flagword bfd_sec_flags_from_mmo_flags PARAMS ((flagword));
417static bfd_byte mmo_get_byte PARAMS ((bfd *));
418static void mmo_write_byte PARAMS ((bfd *, bfd_byte));
419static boolean mmo_new_section_hook PARAMS ((bfd *, asection *));
3f9c735e 420static int mmo_sort_mmo_symbols PARAMS ((const PTR, const PTR));
3c3bdf30
NC		 421static boolean mmo_write_object_contents PARAMS ((bfd *));
422static long mmo_canonicalize_reloc
423 PARAMS ((bfd *, sec_ptr, arelent **, asymbol **));
424
425/* Global "const" variables initialized once. Must not depend on
426 particular input or caller; put such things into the bfd or elsewhere.
427 Look ma, no static per-invocation data! */
428
429static unsigned
430char valid_mmo_symbol_character_set[/* A-Z a-z (we assume consecutive
431 codes; sorry EBCDIC:ers!). */
432 + 'Z' - 'A' + 1 + 'z' - 'a' + 1
433 /* Digits. */
434 + 10
435 /* ':' and '_'. */
436 + 1 + 1
437 /* Codes higher than 126. */
438 + 256 - 126
439 /* Ending zero. */
440 + 1];
441
442
443/* Get section SECNAME or create one if it doesn't exist. When creating
444 one, new memory for the name is allocated. */
445
446static asection *
447mmo_make_section (abfd, secname)
448 bfd *abfd;
3f9c735e 449 const char *secname;
3c3bdf30
NC		 450{
451 asection *sec = bfd_get_section_by_name (abfd, secname);
452
453 if (sec == NULL)
454 {
455 char *newsecname = strdup (secname);
456
457 if (newsecname == NULL)
458 {
459 (*_bfd_error_handler)
460 (_("%s: No core to allocate section name %s\n"),
461 bfd_get_filename (abfd), secname);
462 bfd_set_error (bfd_error_system_call);
463 return NULL;
464 }
465 sec = bfd_make_section (abfd, newsecname);
466 }
467
468 return sec;
469}
470
471/* Nothing to do, but keep as a placeholder if we need it.
472 Note that state that might differ between bfd:s must not be initialized
473 here, nor must it be static. Add it to tdata information instead. */
474
475static void
476mmo_init ()
477{
478 static boolean inited = false;
479 int i = 0;
480 int j = 0;
481 static const char letters[]
482 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789:_";
483
82e51918 484 if (inited)
930b4cb2
HPN		 485 return;
486 inited = true;
3c3bdf30
NC		 487
488 /* Fill in the set of valid symbol characters. */
489 strcpy (valid_mmo_symbol_character_set, letters);
490 i = strlen (letters);
491
492 for (j = 126; j < 256; j++)
493 valid_mmo_symbol_character_set[i++] = j;
494}
495
496/* Check whether an existing file is an mmo file. */
497
3f9c735e 498static const bfd_target *
3c3bdf30
NC		 499mmo_object_p (abfd)
500 bfd *abfd;
501{
502 struct stat statbuf;
503 bfd_byte b[4];
504
505 mmo_init ();
506
507 if (bfd_stat (abfd, &statbuf) < 0
508 || bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
509 || bfd_bread (b, 4, abfd) != 4)
510 goto bad_final;
511
512 /* All mmo files are a multiple of four bytes long.
513 Only recognize version one. */
514 if ((statbuf.st_size % 4) != 0
515 || b[0] != LOP || b[1] != LOP_PRE || b[2] != 1)
516 goto bad_format;
517
518 /* Get the last 32-bit word. */
519 if (bfd_seek (abfd, (file_ptr) statbuf.st_size - 4, SEEK_SET) != 0
520 || bfd_bread (b, 4, abfd) != 4)
521 goto bad_final;
522
523 /* Check if the file ends in a lop_end lopcode. */
524 if (b[0] != LOP || b[1] != LOP_END || ! mmo_mkobject (abfd))
525 goto bad_format;
526
527 /* Compute an upper bound on the max symbol length. Not really
528 important as all of the symbol information can only be 256k. */
529 abfd->tdata.mmo_data->max_symbol_length = (b[2] * 256 + b[3]) * 4;
530 abfd->tdata.mmo_data->lop_stab_symbol
531 = bfd_malloc (abfd->tdata.mmo_data->max_symbol_length + 1);
532
533 if (abfd->tdata.mmo_data->lop_stab_symbol == NULL)
534 {
535 (*_bfd_error_handler)
536 (_("%s: No core to allocate a symbol %d bytes long\n"),
537 bfd_get_filename (abfd), abfd->tdata.mmo_data->max_symbol_length);
538 goto bad_final;
539 }
540
541 /* Read in everything. */
542 if (! mmo_scan (abfd))
543 goto bad_format_free;
544
545 if (abfd->symcount > 0)
546 abfd->flags |= HAS_SYMS;
547
548 /* You'll have to tweak this if you want to use this format for other
549 arches (not recommended due to its small-size limitations). Look at
550 the ELF format for how to make it target-generic. */
551 if (! bfd_default_set_arch_mach (abfd, bfd_arch_mmix, 0))
552 goto bad_format_free;
553
554 return abfd->xvec;
555
556 bad_format_free:
557 free (abfd->tdata.mmo_data->lop_stab_symbol);
558 bad_format:
559 bfd_set_error (bfd_error_wrong_format);
560 bad_final:
561 return NULL;
562}
563
564/* Set up the mmo tdata information. */
565
566static boolean
567mmo_mkobject (abfd)
568 bfd *abfd;
569{
570 mmo_init ();
571
572 if (abfd->tdata.mmo_data == NULL)
573 {
574 time_t created;
575
576 /* All fields are zero-initialized, so we don't have to explicitly
577 initialize most. */
578 tdata_type *tdata = (tdata_type *) bfd_zmalloc (sizeof (tdata_type));
579 if (tdata == NULL)
580 return false;
581
582 created = time (NULL);
583 bfd_put_32 (abfd, created, tdata->created);
584
585 abfd->tdata.mmo_data = tdata;
586 }
587
588 return true;
589}
590
591static boolean
592mmo_bfd_copy_private_bfd_data (ibfd, obfd)
593 bfd *ibfd;
594 bfd *obfd;
595{
596 if (bfd_get_flavour (ibfd) != bfd_target_mmo_flavour
597 || bfd_get_flavour (obfd) != bfd_target_mmo_flavour)
598 return true;
599
600 /* Copy the time the copied-from file was created. If people want the
601 time the file was last *modified*, they have that in the normal file
602 information. */
603 memcpy (obfd->tdata.mmo_data->created, ibfd->tdata.mmo_data->created,
604 sizeof (obfd->tdata.mmo_data->created));
605 return true;
606}
607
608/* Helper functions for mmo_decide_section, used through
609 bfd_map_over_sections. */
610
611static void
612mmo_find_sec_w_addr (abfd, sec, p)
613 bfd *abfd ATTRIBUTE_UNUSED;
614 asection *sec;
615 PTR p;
616{
617 struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p;
618 bfd_vma vma = bfd_get_section_vma (abfd, sec);
619
620 /* Ignore sections that aren't loaded. */
621 if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC))
622 != (SEC_LOAD | SEC_ALLOC))
623 return;
624
625 if (infop->addr >= vma && infop->addr < vma + sec->_raw_size)
626 infop->sec = sec;
627}
628
629static void
630mmo_find_sec_w_addr_grow (abfd, sec, p)
631 bfd *abfd ATTRIBUTE_UNUSED;
632 asection *sec;
633 PTR p;
634{
635 struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p;
636 bfd_vma vma = bfd_get_section_vma (abfd, sec);
637
638 /* Ignore sections that aren't loaded. */
639 if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC))
640 != (SEC_LOAD | SEC_ALLOC))
641 return;
642
643 if (infop->addr >= vma && infop->addr < vma + MAX_ARTIFICIAL_SECTION_SIZE)
644 infop->sec = sec;
645}
646
647/* Find a section that corresponds to a VMA. Automatically create .text
648 or .data and set current section to it, depending on what vma. If we
649 can't deduce a section, make one up as ".MMIX.sec.N", where N is an
650 increasing number. */
651
652static asection *
653mmo_decide_section (abfd, vma)
654 bfd *abfd;
655 bfd_vma vma;
656{
657 asection *sec = NULL;
658 char sec_name[sizeof (".MMIX.sec.") + 20];
659 struct mmo_find_sec_info info;
660
661 info.addr = vma;
662 info.sec = NULL;
663
664 /* First see if there's a section that would match exactly. */
665 bfd_map_over_sections (abfd, mmo_find_sec_w_addr, &info);
666
667 if (info.sec != NULL)
668 return info.sec;
669
670 /* If there's no such section, try and expand one of the existing ones,
671 up to a limit. Make sure we have .text and .data before we try that;
672 create them corresponding to expected addresses and set flags to make
673 them match the "loaded and with contents" expectation. */
674 if ((vma >> 56) == 0)
675 {
676 sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME);
677
678 if (sec == NULL)
679 return NULL;
680
681 if (! sec->user_set_vma)
682 bfd_set_section_vma (abfd, sec, vma);
683 if (! bfd_set_section_flags (abfd, sec,
684 bfd_get_section_flags (abfd, sec)
685 | SEC_CODE | SEC_LOAD | SEC_ALLOC))
686 return NULL;
687 }
688 else if ((vma >> 56) == 0x20)
689 {
690 sec = bfd_make_section_old_way (abfd, MMO_DATA_SECTION_NAME);
691
692 if (sec == NULL)
693 return NULL;
694
695 if (! sec->user_set_vma)
696 bfd_set_section_vma (abfd, sec, vma);
697 if (! bfd_set_section_flags (abfd, sec,
698 bfd_get_section_flags (abfd, sec)
699 | SEC_LOAD | SEC_ALLOC))
700 return NULL;
701 }
702
703 bfd_map_over_sections (abfd, mmo_find_sec_w_addr_grow, &info);
704
705 if (info.sec != NULL)
706 return info.sec;
707
708 /* If there's still no suitable section, make a new one. */
709 sprintf (sec_name, ".MMIX.sec.%d", abfd->tdata.mmo_data->sec_no++);
710 sec = mmo_make_section (abfd, sec_name);
711 if (! sec->user_set_vma)
712 bfd_set_section_vma (abfd, sec, vma);
713
714 if (! bfd_set_section_flags (abfd, sec,
715 bfd_get_section_flags (abfd, sec)
716 | SEC_LOAD | SEC_ALLOC))
717 return NULL;
718 return sec;
719}
720
721/* Xor in a 64-bit value VALUE at VMA. */
722
723static INLINE void
724mmo_xore_64 (sec, vma, value)
725 asection *sec;
726 bfd_vma vma;
727 bfd_vma value;
728{
729 bfd_byte *loc = mmo_get_loc (sec, vma, 8);
730 bfd_vma prev = bfd_get_64 (sec->owner, loc);
731
732 value ^= prev;
733 bfd_put_64 (sec->owner, value, loc);
734}
735
736/* Xor in a 32-bit value VALUE at VMA. */
737
738static INLINE void
739mmo_xore_32 (sec, vma, value)
740 asection *sec;
741 bfd_vma vma;
742 unsigned int value;
743{
744 bfd_byte *loc = mmo_get_loc (sec, vma, 4);
745 unsigned int prev = bfd_get_32 (sec->owner, loc);
746
747 value ^= prev;
748 bfd_put_32 (sec->owner, value, loc);
749}
750
751/* Xor in a 16-bit value VALUE at VMA. */
752
753static INLINE void
754mmo_xore_16 (sec, vma, value)
755 asection *sec;
756 bfd_vma vma;
757 unsigned int value;
758{
759 bfd_byte *loc = mmo_get_loc (sec, vma, 2);
760 unsigned int prev = bfd_get_16 (sec->owner, loc);
761
762 value ^= prev;
763 bfd_put_16 (sec->owner, value, loc);
764}
765
766/* Write a 32-bit word to output file, no lop_quote generated. */
767
768static INLINE void
769mmo_write_tetra_raw (abfd, value)
770 bfd *abfd;
771 unsigned int value;
772{
773 bfd_byte buf[4];
774
775 bfd_put_32 (abfd, value, buf);
776
777 if (bfd_bwrite ((PTR) buf, 4, abfd) != 4)
778 abfd->tdata.mmo_data->have_error = true;
779}
780
781/* Write a 32-bit word to output file; lop_quote if necessary. */
782
783static INLINE void
784mmo_write_tetra (abfd, value)
785 bfd *abfd;
786 unsigned int value;
787{
788 if (((value >> 24) & 0xff) == LOP)
789 mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT);
790
791 mmo_write_tetra_raw (abfd, value);
792}
793
794/* Write a 64-bit word to output file, perhaps with lop_quoting. */
795
796static INLINE void
797mmo_write_octa (abfd, value)
798 bfd *abfd;
799 bfd_vma value;
800{
801 mmo_write_tetra (abfd, (unsigned int) (value >> 32));
802 mmo_write_tetra (abfd, (unsigned int) value);
803}
804
805/* Write a 64-bit word to output file, without lop_quoting. */
806
807static INLINE void
808mmo_write_octa_raw (abfd, value)
809 bfd *abfd;
810 bfd_vma value;
811{
812 mmo_write_tetra_raw (abfd, (unsigned int) (value >> 32));
813 mmo_write_tetra_raw (abfd, (unsigned int) value);
814}
815
dfa36a69
HPN		 816/* Write quoted contents. Intended to be called multiple times in
817 sequence, followed by a call to mmo_flush_chunk. */
3c3bdf30
NC		 818
819static INLINE boolean
820mmo_write_chunk (abfd, loc, len)
821 bfd *abfd;
3f9c735e 822 const bfd_byte *loc;
3c3bdf30
NC		 823 unsigned int len;
824{
825 boolean retval = true;
dfa36a69
HPN		 826
827 /* Fill up a tetra from bytes remaining from a previous chunk. */
828 if (abfd->tdata.mmo_data->byte_no != 0)
829 {
830 while (abfd->tdata.mmo_data->byte_no < 4 && len != 0)
831 {
832 abfd->tdata.mmo_data->buf[abfd->tdata.mmo_data->byte_no++] = *loc++;
833 len--;
834 }
835
836 if (abfd->tdata.mmo_data->byte_no == 4)
837 {
838 mmo_write_tetra (abfd,
839 bfd_get_32 (abfd, abfd->tdata.mmo_data->buf));
840 abfd->tdata.mmo_data->byte_no = 0;
841 }
842 }
3c3bdf30
NC		 843
844 while (len >= 4)
845 {
846 if (loc[0] == LOP)
847 mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT);
848
82e51918
AM		 849 retval = (retval
850 && ! abfd->tdata.mmo_data->have_error
851 && 4 == bfd_bwrite ((PTR) loc, 4, abfd));
3c3bdf30
NC		 852
853 loc += 4;
854 len -= 4;
855 }
856
857 if (len)
858 {
dfa36a69
HPN		 859 memcpy (abfd->tdata.mmo_data->buf, loc, len);
860 abfd->tdata.mmo_data->byte_no = len;
3c3bdf30
NC		 861 }
862
82e51918 863 if (! retval)
dfa36a69 864 abfd->tdata.mmo_data->have_error = true;
3c3bdf30
NC		 865 return retval;
866}
867
dfa36a69
HPN		 868/* Flush remaining bytes, from a previous mmo_write_chunk, zero-padded to
869 4 bytes. */
870
871static INLINE boolean
872mmo_flush_chunk (abfd)
873 bfd *abfd;
874{
875 if (abfd->tdata.mmo_data->byte_no != 0)
876 {
877 memset (abfd->tdata.mmo_data->buf + abfd->tdata.mmo_data->byte_no,
878 0, 4 - abfd->tdata.mmo_data->byte_no);
879 mmo_write_tetra (abfd,
880 bfd_get_32 (abfd, abfd->tdata.mmo_data->buf));
881 abfd->tdata.mmo_data->byte_no = 0;
882 }
883
82e51918 884 return ! abfd->tdata.mmo_data->have_error;
dfa36a69
HPN		 885}
886
3c3bdf30
NC		 887/* Same, but from a list. */
888
889static INLINE boolean
890mmo_write_chunk_list (abfd, datap)
891 bfd *abfd;
892 mmo_data_list_type *datap;
893{
894 for (; datap != NULL; datap = datap->next)
895 if (! mmo_write_chunk (abfd, datap->data, datap->size))
896 return false;
897
dfa36a69 898 return mmo_flush_chunk (abfd);
3c3bdf30
NC		 899}
900
dfa36a69
HPN		 901/* Write a lop_loc and some contents. A caller needs to call
902 mmo_flush_chunk after calling this function. The location is only
903 output if different than *LAST_VMAP, which is updated after this call. */
3c3bdf30
NC		 904
905static boolean
dfa36a69 906mmo_write_loc_chunk (abfd, vma, loc, len, last_vmap)
3c3bdf30
NC		 907 bfd *abfd;
908 bfd_vma vma;
3f9c735e 909 const bfd_byte *loc;
3c3bdf30 910 unsigned int len;
dfa36a69 911 bfd_vma *last_vmap;
3c3bdf30 912{
3c3bdf30
NC		 913 /* Find an initial and trailing section of zero tetras; we don't need to
914 write out zeros. FIXME: When we do this, we should emit section size
dfa36a69 915 and address specifiers, else objcopy can't always perform an identity
8d28f606
HPN		 916 translation. Only do this if we *don't* have left-over data from a
917 previous write or the vma of this chunk is *not* the next address,
918 because then data isn't tetrabyte-aligned and we're concatenating to
919 that left-over data. */
920
921 if (abfd->tdata.mmo_data->byte_no == 0 || vma != *last_vmap)
3c3bdf30 922 {
8d28f606
HPN		 923 while (len >= 4 && bfd_get_32 (abfd, loc) == 0)
924 {
925 vma += 4;
926 len -= 4;
927 loc += 4;
928 }
3c3bdf30 929
8d28f606
HPN		 930 while (len >= 4 && bfd_get_32 (abfd, loc + len - 4) == 0)
931 len -= 4;
932 }
3c3bdf30 933
dfa36a69
HPN		 934 /* Only write out the location if it's different than the one the caller
935 (supposedly) previously handled, accounting for omitted leading zeros. */
936 if (vma != *last_vmap)
937 {
938 /* We might be in the middle of a sequence. */
939 mmo_flush_chunk (abfd);
940
941 /* We always write the location as 64 bits; no use saving bytes
942 here. */
943 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_LOC << 16) | 2);
944 mmo_write_octa_raw (abfd, vma);
945 }
946
947 /* Update to reflect end of this chunk, with trailing zeros omitted. */
948 *last_vmap = vma + len;
949
82e51918
AM		 950 return (! abfd->tdata.mmo_data->have_error
951 && mmo_write_chunk (abfd, loc, len));
3c3bdf30
NC		 952}
953
954/* Same, but from a list. */
955
956static INLINE boolean
957mmo_write_loc_chunk_list (abfd, datap)
958 bfd *abfd;
959 mmo_data_list_type *datap;
960{
dfa36a69
HPN		 961 /* Get an address different than the address of the first chunk. */
962 bfd_vma last_vma = datap ? datap->where - 1 : 0;
963
3c3bdf30 964 for (; datap != NULL; datap = datap->next)
dfa36a69
HPN		 965 if (! mmo_write_loc_chunk (abfd, datap->where, datap->data, datap->size,
966 &last_vma))
3c3bdf30
NC		 967 return false;
968
dfa36a69 969 return mmo_flush_chunk (abfd);
3c3bdf30
NC		 970}
971
972/* Make a .MMIX.spec_data.N section. */
973
974static asection *
975mmo_get_generic_spec_data_section (abfd, spec_data_number)
976 bfd *abfd;
977 int spec_data_number;
978{
979 asection *sec;
980 char secname[sizeof (MMIX_OTHER_SPEC_SECTION_PREFIX) + 20]
981 = MMIX_OTHER_SPEC_SECTION_PREFIX;
982
983 sprintf (secname + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX),
984 "%d", spec_data_number);
985
986 sec = mmo_make_section (abfd, secname);
987
988 return sec;
989}
990
991/* Make a special section for SPEC_DATA_NUMBER. If it is the one we use
992 ourselves, parse some of its data to get at the section name. */
993
994static asection *
995mmo_get_spec_section (abfd, spec_data_number)
996 bfd *abfd;
997 int spec_data_number;
998{
999 bfd_byte *secname;
1000 asection *sec;
1001 bfd_byte buf[4];
1002 unsigned int secname_length;
1003 unsigned int i;
1004 bfd_vma section_length;
1005 bfd_vma section_vma;
1006 mmo_data_list_type *loc;
1007 flagword flags;
1008 long orig_pos;
1009
1010 /* If this isn't the "special" special data, then make a placeholder
1011 section. */
1012 if (spec_data_number != SPEC_DATA_SECTION)
1013 return mmo_get_generic_spec_data_section (abfd, spec_data_number);
1014
1015 /* Seek back to this position if there was a format error. */
1016 orig_pos = bfd_tell (abfd);
1017
1018 /* Read the length (in 32-bit words). */
1019 if (bfd_bread (buf, 4, abfd) != 4)
1020 goto format_error;
1021
1022 if (buf[0] == LOP)
1023 {
1024 if (buf[1] != LOP_QUOTE)
1025 goto format_error;
1026
1027 if (bfd_bread (buf, 4, abfd) != 4)
1028 goto format_error;
1029 }
1030
1031 /* We don't care to keep the name length accurate. It's
1032 zero-terminated. */
1033 secname_length = bfd_get_32 (abfd, buf) * 4;
1034
1035 /* Check section name length for sanity. */
1036 if (secname_length > MAX_SECTION_NAME_SIZE)
1037 goto format_error;
1038
1039 /* This should be free'd regardless if a section is created. */
1040 secname = bfd_malloc (secname_length + 1);
1041 secname[secname_length] = 0;
1042
1043 for (i = 0; i < secname_length / 4; i++)
1044 {
1045 if (bfd_bread (secname + i * 4, 4, abfd) != 4)
1046 goto format_error_free;
1047
1048 if (secname[i * 4] == LOP)
1049 {
1050 /* A bit of overkill, but we handle char 0x98 in a section name,
1051 and recognize misparsing. */
1052 if (secname[i * 4 + 1] != LOP_QUOTE
1053 || bfd_bread (secname + i * 4, 4, abfd) != 4)
1054 /* Whoops. We thought this was a name, and now we found a
1055 non-lop_quote lopcode before we parsed the whole length of
1056 the name. Signal end-of-file in the same manner. */
1057 goto format_error_free;
1058 }
1059 }
1060
1061 /* Get the section flags. */
1062 if (bfd_bread (buf, 4, abfd) != 4
1063 || (buf[0] == LOP
1064 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4)))
1065 goto format_error_free;
1066
1067 flags = bfd_get_32 (abfd, buf);
1068
1069 /* Get the section length. */
1070 if (bfd_bread (buf, 4, abfd) != 4
1071 || (buf[0] == LOP
1072 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4)))
1073 goto format_error_free;
1074
1075 section_length = (bfd_vma) bfd_get_32 (abfd, buf) << 32;
1076
1077 /* That's the first, high-part. Now get the low part. */
1078
1079 if (bfd_bread (buf, 4, abfd) != 4
1080 || (buf[0] == LOP
1081 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4)))
1082 goto format_error_free;
1083
1084 section_length |= (bfd_vma) bfd_get_32 (abfd, buf);
1085
1086 /* Check the section length for sanity. */
1087 if (section_length > MAX_ARTIFICIAL_SECTION_SIZE)
1088 goto format_error_free;
1089
1090 /* Get the section VMA. */
1091 if (bfd_bread (buf, 4, abfd) != 4
1092 || (buf[0] == LOP
1093 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4)))
1094 goto format_error_free;
1095
1096 section_vma = (bfd_vma) bfd_get_32 (abfd, buf) << 32;
1097
1098 /* That's the first, high-part. Now get the low part. */
1099 if (bfd_bread (buf, 4, abfd) != 4
1100 || (buf[0] == LOP
1101 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4)))
1102 goto format_error_free;
1103
1104 section_vma |= (bfd_vma) bfd_get_32 (abfd, buf);
1105
1106 sec = mmo_make_section (abfd, secname);
1107 free (secname);
1108 if (sec == NULL)
1109 goto format_error;
1110
1111 /* We allocate a buffer here for the advertised size, with head room for
1112 tetrabyte alignment. */
1113 loc = bfd_zmalloc (section_length + 3
1114 + sizeof (struct mmo_data_list_struct));
1115 if (loc == NULL)
1116 goto format_error;
1117
1118 /* Use a TETRA-rounded size for the allocated buffer; we set the
1119 "visible" section size below. */
1120 loc->size = (section_length + 3) & ~3;
1121
1122 /* Add in the section flags we found to those bfd entered during this
1123 process and set the contents. */
1124 if (! bfd_set_section_flags (abfd, sec,
1125 bfd_sec_flags_from_mmo_flags (flags)
1126 | bfd_get_section_flags (abfd, sec)
1127 | (section_length != 0 ? SEC_HAS_CONTENTS : 0))
1128 || ! bfd_set_section_size (abfd, sec,
1129 sec->_cooked_size + section_length)
1130 /* Set VMA only for the first occurrence. */
1131 || (! sec->user_set_vma
1132 && ! bfd_set_section_vma (abfd, sec, section_vma)))
1133 {
1134 /* If we get an error for any of the calls above, signal more than
1135 just a format error for the spec section. */
1136 return NULL;
1137 }
1138
1139 loc->next = NULL;
1140 if (((struct mmo_section_data_struct *) (sec->used_by_bfd))->tail != NULL)
1141 ((struct mmo_section_data_struct *) (sec->used_by_bfd))->tail->next
1142 = loc;
1143 else
1144 ((struct mmo_section_data_struct *) (sec->used_by_bfd))->head = loc;
1145 ((struct mmo_section_data_struct *) (sec->used_by_bfd))->tail = loc;
1146 loc->where = section_vma;
1147
1148 return sec;
1149
1150 format_error_free:
1151 free (secname);
1152 format_error:
1153 if (bfd_seek (abfd, orig_pos, SEEK_SET) != 0)
1154 return NULL;
1155
1156 return mmo_get_generic_spec_data_section (abfd, spec_data_number);
1157}
1158
1159/* Read a byte, but read from file in multiples of 32-bit words. */
1160
1161static bfd_byte
1162mmo_get_byte (abfd)
1163 bfd *abfd;
1164{
1165 bfd_byte retval;
1166
1167 if (abfd->tdata.mmo_data->byte_no == 0)
1168 {
82e51918 1169 if (! abfd->tdata.mmo_data->have_error
3c3bdf30
NC		 1170 && bfd_bread (abfd->tdata.mmo_data->buf, 4, abfd) != 4)
1171 {
1172 abfd->tdata.mmo_data->have_error = true;
1173
1174 /* A value somewhat safe against tripping on some inconsistency
1175 when mopping up after this error. */
1176 return 128;
1177 }
1178 }
1179
1180 retval = abfd->tdata.mmo_data->buf[abfd->tdata.mmo_data->byte_no];
1181 abfd->tdata.mmo_data->byte_no = (abfd->tdata.mmo_data->byte_no + 1) % 4;
1182
1183 return retval;
1184}
1185
1186/* Write a byte, in multiples of 32-bit words. */
1187
1188static void
1189mmo_write_byte (abfd, value)
1190 bfd *abfd;
1191 bfd_byte value;
1192{
1193 abfd->tdata.mmo_data->buf[(abfd->tdata.mmo_data->byte_no++ % 4)] = value;
1194 if ((abfd->tdata.mmo_data->byte_no % 4) == 0)
1195 {
82e51918 1196 if (! abfd->tdata.mmo_data->have_error
3c3bdf30
NC		 1197 && bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4)
1198 abfd->tdata.mmo_data->have_error = true;
1199 }
1200}
1201
1202/* Create a symbol. */
1203
1204static boolean
1205mmo_create_symbol (abfd, symname, addr, sym_type, serno)
1206 bfd *abfd;
3f9c735e 1207 const char *symname;
3c3bdf30
NC		 1208 bfd_vma addr;
1209 enum mmo_sym_type sym_type;
1210 unsigned int serno;
1211{
1212 struct mmo_symbol *n;
1213
1214 n = (struct mmo_symbol *) bfd_alloc (abfd, sizeof (struct mmo_symbol));
1215 if (n == NULL)
1216 return false;
1217
1218 n->name = bfd_alloc (abfd, strlen (symname) + 1);
1219 if (n->name == NULL)
1220 return false;
1221
1222 strcpy ((PTR) n->name, symname);
1223
1224 n->value = addr;
1225 n->sym_type = sym_type;
1226 n->serno = serno;
1227
1228 if (abfd->tdata.mmo_data->symbols == NULL)
1229 abfd->tdata.mmo_data->symbols = n;
1230 else
1231 abfd->tdata.mmo_data->symtail->next = n;
1232 abfd->tdata.mmo_data->symtail = n;
1233 n->next = NULL;
1234
1235 ++abfd->symcount;
1236
1237 /* Check that :Main equals the last octa of the .MMIX.reg_contents
1238 section, as it's the one place we're sure to pass when reading a mmo
1239 object. For written objects, we do it while setting the symbol
1240 table. */
1241 if (strcmp (symname, MMIX_START_SYMBOL_NAME) == 0
1242 && bfd_get_start_address (abfd) != addr)
1243 {
1244 (*_bfd_error_handler)
1245 (_("%s: invalid mmo file: initialization value for $255 is not `Main'\n"),
1246 bfd_get_filename (abfd));
1247 bfd_set_error (bfd_error_bad_value);
1248 return false;
1249 }
1250
1251 return true;
1252}
1253
1254/* Read in symbols. */
1255
1256static boolean
1257mmo_get_symbols (abfd)
1258 bfd *abfd;
1259{
1260/*
1261INODE
1262Symbol-table, mmo section mapping, File layout, mmo
1263SUBSECTION
1264 Symbol table format
1265
1266 From mmixal.w (or really, the generated mmixal.tex) in
6eeb40b2 1267 @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz}):
3c3bdf30
NC		 1268 ``Symbols are stored and retrieved by means of a @samp{ternary
1269 search trie}, following ideas of Bentley and Sedgewick. (See
1270 ACM--SIAM Symp.@: on Discrete Algorithms @samp{8} (1997), 360--369;
1271 R.@:Sedgewick, @samp{Algorithms in C} (Reading, Mass.@:
1272 Addison--Wesley, 1998), @samp{15.4}.) Each trie node stores a
1273 character, and there are branches to subtries for the cases where
1274 a given character is less than, equal to, or greater than the
1275 character in the trie. There also is a pointer to a symbol table
1276 entry if a symbol ends at the current node.''
1277
1278 So it's a tree encoded as a stream of bytes. The stream of bytes
1279 acts on a single virtual global symbol, adding and removing
1280 characters and signalling complete symbol points. Here, we read
1281 the stream and create symbols at the completion points.
1282
1283 First, there's a control byte <<m>>. If any of the listed bits
1284 in <<m>> is nonzero, we execute what stands at the right, in
1285 the listed order:
1286
1287| (MMO3_LEFT)
1288| 0x40 - Traverse left trie.
1289| (Read a new command byte and recurse.)
1290|
1291| (MMO3_SYMBITS)
1292| 0x2f - Read the next byte as a character and store it in the
1293| current character position; increment character position.
1294| Test the bits of <<m>>:
1295|
1296| (MMO3_WCHAR)
1297| 0x80 - The character is 16-bit (so read another byte,
1298| merge into current character.
1299|
1300| (MMO3_TYPEBITS)
1301| 0xf - We have a complete symbol; parse the type, value
1302| and serial number and do what should be done
1303| with a symbol. The type and length information
1304| is in j = (m & 0xf).
1305|
1306| (MMO3_REGQUAL_BITS)
1307| j == 0xf: A register variable. The following
1308| byte tells which register.
1309| j <= 8: An absolute symbol. Read j bytes as the
1310| big-endian number the symbol equals.
1311| A j = 2 with two zero bytes denotes an
1312| unknown symbol.
1313| j > 8: As with j <= 8, but add (0x20 << 56)
1314| to the value in the following j - 8
1315| bytes.
1316|
1317| Then comes the serial number, as a variant of
1318| uleb128, but better named ubeb128:
1319| Read bytes and shift the previous value left 7
1320| (multiply by 128). Add in the new byte, repeat
1321| until a byte has bit 7 set. The serial number
1322| is the computed value minus 128.
1323|
1324| (MMO3_MIDDLE)
1325| 0x20 - Traverse middle trie. (Read a new command byte
1326| and recurse.) Decrement character position.
1327|
1328| (MMO3_RIGHT)
1329| 0x10 - Traverse right trie. (Read a new command byte and
1330| recurse.)
1331
1332 Let's look again at the <<lop_stab>> for the trivial file
1333 (@pxref{File layout}).
1334
1335| 0x980b0000 - lop_stab for ":Main" = 0, serial 1.
1336| 0x203a4040
1337| 0x10404020
1338| 0x4d206120
1339| 0x69016e00
1340| 0x81000000
1341
1342 This forms the trivial trie (note that the path between ``:'' and
1343 ``M'' is redundant):
1344
1345| 203a ":"
1346| 40 /
1347| 40 /
1348| 10 \
1349| 40 /
1350| 40 /
1351| 204d "M"
1352| 2061 "a"
1353| 2069 "i"
1354| 016e "n" is the last character in a full symbol, and
1355| with a value represented in one byte.
1356| 00 The value is 0.
1357| 81 The serial number is 1. */
1358
1359 bfd_byte m = mmo_get_byte (abfd);
1360
1361 /* Check first if we have a bad hair day. */
82e51918 1362 if (abfd->tdata.mmo_data->have_error)
3c3bdf30
NC		 1363 return false;
1364
1365 if (m & MMO3_LEFT)
1366 /* Traverse left trie. */
1367 mmo_get_symbols (abfd);
1368
1369 if (m & MMO3_SYMBITS)
1370 {
1371 bfd_byte c = mmo_get_byte (abfd);
1372 bfd_byte j = m & MMO3_TYPEBITS;
1373 bfd_vma addr = 0;
1374 enum mmo_sym_type sym_type;
1375 unsigned int serno = 0;
1376 bfd_byte k;
1377
1378 if (m & MMO3_WCHAR)
1379 {
1380 bfd_byte c2 = mmo_get_byte (abfd);
1381
1382 /* A two-byte character. We can't grok this, but neither can
1383 mmotype, for other cases than the second byte being zero. */
1384
1385 if (c != 0)
1386 {
1387 abfd->tdata.mmo_data->lop_stab_symbol
1388 [abfd->tdata.mmo_data->symbol_position] = 0;
1389
1390 (*_bfd_error_handler)
1391 (_("%s: unsupported wide character sequence\
1392 0x%02X 0x%02X after symbol name starting with `%s'\n"),
1393 bfd_get_filename (abfd), c, c2,
1394 abfd->tdata.mmo_data->lop_stab_symbol);
1395 bfd_set_error (bfd_error_bad_value);
1396 abfd->tdata.mmo_data->have_error = true;
1397 return false;
1398 }
1399 else
1400 c = c2;
1401 }
1402
1403 abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position++] = c;
1404 abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position] = 0;
1405
1406 if (j & MMO3_REGQUAL_BITS)
1407 {
1408 if (j == MMO3_REGQUAL_BITS)
1409 {
1410 sym_type = mmo_reg_sym;
1411 addr = mmo_get_byte (abfd);
1412 }
1413 else if (j <= 8)
1414 {
1415 unsigned int i;
1416
1417 for (i = 0; i < j; i++)
1418 addr = (addr << 8) + mmo_get_byte (abfd);
1419
1420 if (addr == 0 && j == MMO3_UNDEF)
1421 sym_type = mmo_undef_sym;
1422 else
1423 sym_type = mmo_abs_sym;
1424 }
1425 else
1426 {
1427 unsigned int i;
1428
1429 for (i = MMO3_DATA; i < j; i++)
1430 addr = (addr << 8) + mmo_get_byte (abfd);
1431
1432 addr += (bfd_vma) 0x20 << 56;
1433 sym_type = mmo_data_sym;
1434 }
1435
1436 /* Get the serial number. */
1437 do
1438 {
1439 k = mmo_get_byte (abfd);
1440 serno = (serno << 7) + k;
1441 }
1442 while (k < 128);
1443 serno -= 128;
1444
1445 /* Got it. Now enter it. Skip a leading ":". */
82e51918 1446 if (! abfd->tdata.mmo_data->have_error
3c3bdf30
NC		 1447 && ! mmo_create_symbol (abfd,
1448 abfd->tdata.mmo_data->lop_stab_symbol
1449 + 1,
1450 addr, sym_type, serno))
1451 abfd->tdata.mmo_data->have_error = true;
1452 }
1453
1454 if (m & MMO3_MIDDLE)
1455 /* Traverse middle trie. */
1456 mmo_get_symbols (abfd);
1457
1458 abfd->tdata.mmo_data->symbol_position--;
1459 }
1460
1461 if (m & MMO3_RIGHT)
1462 /* Traverse right trie. */
1463 mmo_get_symbols (abfd);
1464
82e51918 1465 return ! abfd->tdata.mmo_data->have_error;
3c3bdf30
NC		 1466}
1467
1468/* Get the location of memory area [VMA..VMA + SIZE - 1], which we think
1469 is in section SEC. Adjust and reallocate zero-initialized contents.
1470 If there's new contents, allocate to the next multiple of
1471 MMO_SEC_CONTENTS_CHUNK_SIZE. */
1472
1473static INLINE bfd_byte *
1474mmo_get_loc (sec, vma, size)
1475 asection *sec;
1476 bfd_vma vma;
1477 int size;
1478{
1479 bfd_size_type allocated_size;
1480 struct mmo_section_data_struct *sdatap
1481 = (struct mmo_section_data_struct *) sec->used_by_bfd;
1482 struct mmo_data_list_struct *datap = sdatap->head;
1483 struct mmo_data_list_struct *entry;
1484
dfa36a69
HPN		 1485 /* First search the list to see if we have the requested chunk in one
1486 piece, or perhaps if we have a suitable chunk with room to fit. */
3c3bdf30
NC		 1487 for (; datap != NULL; datap = datap->next)
1488 {
1489 if (datap->where <= vma
1490 && datap->where + datap->size >= vma + size)
1491 return datap->data + vma - datap->where;
1492 else if (datap->where <= vma
1493 && datap->where + datap->allocated_size >= vma + size
1494 /* Only munch on the "allocated size" if it does not
1495 overlap the next chunk. */
1496 && (datap->next == NULL || datap->next->where >= vma + size))
1497 {
1498 /* There was room allocated, but the size wasn't set to include
1499 it. Do that now. */
1500 datap->size += (vma + size) - (datap->where + datap->size);
1501
dfa36a69
HPN		 1502 /* Update the section size. This happens only if we update the
1503 32-bit-aligned chunk size. Callers that have
1504 non-32-bit-aligned sections should do all allocation and
1505 size-setting by themselves or at least set the section size
1506 after the last allocating call to this function. */
3c3bdf30
NC		 1507 if (vma + size > sec->vma + sec->_raw_size)
1508 sec->_raw_size += (vma + size) - (sec->vma + sec->_raw_size);
1509
1510 return datap->data + vma - datap->where;
1511 }
1512 }
1513
1514 /* Not found; allocate a new block. First check in case we get a
1515 request for a size split up over several blocks; we'll have to return
1516 NULL for those cases, requesting the caller to split up the request.
1517 Requests with an address aligned on MMO_SEC_CONTENTS_CHUNK_SIZE bytes and
1518 for no more than MMO_SEC_CONTENTS_CHUNK_SIZE will always get resolved. */
1519
1520 for (datap = sdatap->head; datap != NULL; datap = datap->next)
1521 if ((datap->where <= vma && datap->where + datap->size > vma)
1522 || (datap->where < vma + size
1523 && datap->where + datap->size >= vma + size))
1524 return NULL;
1525
1526 allocated_size
1527 = (size + MMO_SEC_CONTENTS_CHUNK_SIZE - 1) & ~(MMO_SEC_CONTENTS_CHUNK_SIZE - 1);
1528 entry = (mmo_data_list_type *)
1529 bfd_zalloc (sec->owner, sizeof (mmo_data_list_type) + allocated_size);
1530 if (entry == NULL)
c295a511 1531 return NULL;
3c3bdf30
NC		 1532 entry->where = vma;
1533 entry->size = size;
1534 entry->allocated_size = allocated_size;
1535
1536 datap = sdatap->head;
1537
1538 /* Sort the records by address. Optimize for the common case of adding
1539 a record to the end of the list. */
1540 if (sdatap->tail != NULL && entry->where >= sdatap->tail->where)
1541 {
1542 sdatap->tail->next = entry;
1543 entry->next = NULL;
1544 sdatap->tail = entry;
1545 }
1546 else
1547 {
1548 mmo_data_list_type **look;
1549 for (look = &sdatap->head;
1550 *look != NULL && (*look)->where < entry->where;
1551 look = &(*look)->next)
1552 ;
1553 entry->next = *look;
1554 *look = entry;
1555 if (entry->next == NULL)
1556 {
1557 sdatap->tail = entry;
1558
1559 /* We get here for the first time (at other times too) for this
1560 section. Say we have contents. */
1561 if (! bfd_set_section_flags (sec->owner, sec,
1562 bfd_get_section_flags (sec->owner, sec)
1563 | SEC_HAS_CONTENTS))
1564 return NULL;
1565 }
1566 }
1567
dfa36a69
HPN		 1568 /* Update the section size. This happens only when we add contents and
1569 re-size as we go. The section size will then be aligned to 32 bits. */
3c3bdf30
NC		 1570 if (vma + size > sec->vma + sec->_raw_size)
1571 sec->_raw_size += (vma + size) - (sec->vma + sec->_raw_size);
1572 return entry->data;
1573}
1574
1575/* Set sizes once we've read in all sections. */
1576
1577static void
1578mmo_map_set_sizes (abfd, sec, ignored)
1579 bfd *abfd ATTRIBUTE_UNUSED;
1580 asection *sec;
1581 PTR ignored ATTRIBUTE_UNUSED;
1582{
1583 sec->_cooked_size = sec->_raw_size;
1584 sec->lma = sec->vma;
1585}
1586
1587/* Read the mmo file and turn it into sections. */
1588
1589static boolean
1590mmo_scan (abfd)
1591 bfd *abfd;
1592{
1593 unsigned int i;
1594 unsigned int lineno = 1;
1595 boolean error = false;
1596 bfd_vma vma = 0;
1597 asection *sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME);
1598 asection *non_spec_sec = NULL;
1599 bfd_vma non_spec_vma = 0;
1600 char *current_filename = NULL;
1601 bfd_size_type nbytes_read = 0;
1602 /* Buffer with room to read a 64-bit value. */
1603 bfd_byte buf[8];
1604 long stab_loc = -1;
1605 char *file_names[256];
1606
1607 memset (file_names, 0, sizeof (file_names));
1608
1609 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
1610 goto error_return;
1611
1612 while ((nbytes_read = bfd_bread (buf, 4, abfd)) == 4)
1613 {
1614 if (buf[0] == LOP)
1615 {
1616 unsigned int y = bfd_get_8 (abfd, buf + 2);
1617 unsigned int z = bfd_get_8 (abfd, buf + 3);
1618
1619 /* Change back to the original section for lopcodes other
1620 than LOP_QUOTE that comes after a LOP_SPEC. */
1621 if ((buf[1] != LOP_QUOTE || y != 0 || z != 1)
1622 && non_spec_sec != NULL)
1623 {
1624 sec = non_spec_sec;
1625 vma = non_spec_vma;
1626 non_spec_sec = NULL;
1627 }
1628
1629 switch (buf[1])
1630 {
1631 default:
1632 (*_bfd_error_handler)
1633 (_("%s: invalid mmo file: unsupported lopcode `%d'\n"),
1634 bfd_get_filename (abfd), buf[1]);
1635 bfd_set_error (bfd_error_bad_value);
1636 goto error_return;
1637
1638 case LOP_QUOTE:
1639 /* Quote the next 32-bit word. */
1640 if (y != 0 || z != 1)
1641 {
1642 (*_bfd_error_handler)
1643 (_("%s: invalid mmo file: expected YZ = 1 got YZ = %d for lop_quote\n"),
1644 bfd_get_filename (abfd), y*256+z);
1645 bfd_set_error (bfd_error_bad_value);
1646 goto error_return;
1647 }
1648 if (bfd_bread (buf, 4, abfd) != 4)
1649 goto error_return;
1650
1651 mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf));
1652 vma += 4;
1653 vma &= ~3;
1654 lineno++;
1655 break;
1656
1657 case LOP_LOC:
1658 /* Set vma (and section). */
1659 vma = (bfd_vma) y << 56;
1660 if (z == 1)
1661 {
1662 /* Get a 32-bit value. */
1663 if (bfd_bread (buf, 4, abfd) != 4)
1664 goto error_return;
1665
1666 vma += bfd_get_32 (abfd, buf);
1667 }
1668 else if (z == 2)
1669 {
1670 /* Get a 64-bit value. */
1671 if (bfd_bread (buf, 8, abfd) != 8)
1672 goto error_return;
1673
1674 vma += bfd_get_64 (abfd, buf);
1675 }
1676 else
1677 {
1678 (*_bfd_error_handler)
1679 (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_loc\n"),
1680 bfd_get_filename (abfd), z);
1681 bfd_set_error (bfd_error_bad_value);
1682 goto error_return;
1683 }
1684
1685 sec = mmo_decide_section (abfd, vma);
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)
1839 (_("%s: invalid mmo file: file number %d `%s',\
1840 was already entered as `%s'\n"),
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)
1852 (_("%s: invalid mmo file: file name for number %d\
1853 was not specified before use\n"),
1854 bfd_get_filename (abfd), y);
1855 bfd_set_error (bfd_error_bad_value);
1856 goto error_return;
1857 }
1858
1859 current_filename = file_names[y];
1860 lineno = 0;
1861 break;
1862
1863 case LOP_LINE:
1864 /* Set line number. */
1865 lineno = y * 256 + z;
1866 /* FIXME: Create a sequence of mmo-specific line number
1867 entries for each section, then translate into canonical
1868 format. */
1869 break;
1870
1871 case LOP_SPEC:
1872 /* Special data follows until the next non-lop_quote
1873 lopcode. */
1874 non_spec_sec = sec;
1875 non_spec_vma = vma;
1876 sec = mmo_get_spec_section (abfd, y * 256 + z);
1877 if (sec == NULL)
1878 goto error_return;
1879
1880 vma = sec->vma;
1881 break;
1882
1883 case LOP_PRE:
1884 {
1885 /* We ignore header information, except we read in the
1886 creation time from the first 32-bit word with the time
1887 in seconds since era. */
1888 if (z >= 1
1889 && bfd_bread (abfd->tdata.mmo_data->created, 4,
1890 abfd) != 4)
1891 goto error_return;
1892
1893 for (i = 1; i < z; i++)
1894 if (bfd_bread (buf, 4, abfd) != 4)
1895 goto error_return;
1896 }
1897 break;
1898
1899 case LOP_POST:
1900 /* This tells of the contents of registers $Z..$255 at
1901 startup. We make a section out of it, with VMA = Z * 8,
1902 but only if Z != 255 or the contents is non-zero. */
1903 {
1904 asection *rsec;
1905 bfd_byte *loc;
1906 bfd_vma first_octa;
1907 bfd_vma startaddr_octa;
1908
1909 /* Read first octaword outside loop to simplify logic when
1910 excluding the Z == 255, octa == 0 case. */
1911 if (bfd_bread (buf, 8, abfd) != 8)
1912 goto error_return;
1913
1914 first_octa = bfd_get_64 (abfd, buf);
1915
1916 /* Don't emit contents for the trivial case which is
1917 always present; $255 pointing to Main. */
1918 if (z != 255)
1919 {
1920 rsec
1921 = bfd_make_section_old_way (abfd,
1922 MMIX_REG_CONTENTS_SECTION_NAME);
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)
1958 (_("%s: invalid mmo file: fields y and z of lop_stab\
1959 non-zero, y: %d, z: %d\n"),
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;
1986 long curpos = bfd_tell (abfd);
1987
1988 if (bfd_stat (abfd, &statbuf) < 0)
1989 goto error_return;
1990
1991 if (statbuf.st_size != curpos)
1992 {
1993 (*_bfd_error_handler)
1994 (_("%s: invalid mmo file: lop_end not last item in\
1995 file\n"),
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)
2007 (_("%s: invalid mmo file: YZ of lop_end (%ld)\
2008 not equal to the number of tetras to the preceding lop_stab (%ld)\n"),
2009 bfd_get_filename (abfd), (long) (y * 256 + z),
2010 (curpos - stab_loc - 4)/4);
2011 bfd_set_error (bfd_error_bad_value);
2012 goto error_return;
2013 }
2014
2015 bfd_map_over_sections (abfd, mmo_map_set_sizes, NULL);
2016 goto done;
2017 }
2018 }
2019 }
2020 else
2021 {
2022 /* This wasn't a lopcode, so store it in the current section. */
2023 mmo_xore_32 (sec, vma & ~3, bfd_get_32 (abfd, buf));
2024 vma += 4;
2025 vma &= ~3;
2026 lineno++;
2027 }
2028 }
2029
2030 /* We know this file is a multiple of four bytes (checked in
2031 mmo_object_p), so if we got something other than 0, this was a bad
2032 file (although it's more likely we'll get 0 in that case too).
2033 If we got end-of-file, then there was no lop_stab, so the file has
2034 invalid format. */
2035
2036 if (nbytes_read != 0)
2037 bfd_set_error (bfd_error_system_call);
2038 else
2039 bfd_set_error (bfd_error_bad_value);
2040
2041 error_return:
2042 error = true;
2043 done:
2044 /* Mark the .text and .data section with their normal attribute if they
2045 contain anything. This is not redundant wrt. mmo_decide_section,
2046 since that code might never execute, and conversely the alloc+code
2047 section flags must be set then. */
2048 sec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME);
2049 if (sec != NULL
2050 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)
2051 && ! bfd_set_section_flags (abfd, sec,
2052 bfd_get_section_flags (abfd, sec)
2053 | SEC_ALLOC | SEC_LOAD | SEC_CODE))
2054 error = true;
2055
2056 sec = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME);
2057 if (sec != NULL
2058 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)
2059 && ! bfd_set_section_flags (abfd, sec,
2060 bfd_get_section_flags (abfd, sec)
2061 | SEC_ALLOC | SEC_LOAD))
2062 error = true;
2063
2064 /* Free whatever resources we took. */
2065 for (i = 0; i < sizeof (file_names) / sizeof (file_names[0]); i++)
2066 if (file_names[i])
2067 free (file_names[i]);
82e51918 2068 return ! error;
3c3bdf30
NC		 2069}
2070
2071/* A hook to set up object file dependent section information. For mmo,
2072 we point out the shape of allocated section contents. */
2073
2074static boolean
2075mmo_new_section_hook (abfd, newsect)
2076 bfd *abfd ATTRIBUTE_UNUSED;
2077 asection *newsect;
2078{
2079 /* We zero-fill all fields and assume NULL is represented by an all
2080 zero-bit pattern. */
2081 newsect->used_by_bfd =
2082 (PTR) bfd_zalloc (abfd, sizeof (struct mmo_section_data_struct));
2083
2084 if (!newsect->used_by_bfd)
2085 return false;
2086
2087 /* Always align to at least 32-bit words. */
2088 newsect->alignment_power = 2;
2089 return true;
2090}
2091
2092/* We already have section contents loaded for sections that have
2093 contents. */
2094
2095static boolean
2096mmo_get_section_contents (abfd, sec, location, offset, bytes_to_do)
2097 bfd *abfd ATTRIBUTE_UNUSED;
2098 asection *sec ATTRIBUTE_UNUSED;
2099 PTR location ATTRIBUTE_UNUSED;
2100 file_ptr offset ATTRIBUTE_UNUSED;
2101 bfd_size_type bytes_to_do ATTRIBUTE_UNUSED;
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)
2119 return false;
2120
2121 memcpy (location, loc, chunk_size);
2122
2123 location += chunk_size;
2124 bytes_to_do -= chunk_size;
2125 offset += chunk_size;
2126 }
2127 return true;
2128}
2129
2130/* Return the amount of memory needed to read the symbol table. */
2131
2132static long
2133mmo_get_symtab_upper_bound (abfd)
2134 bfd *abfd ATTRIBUTE_UNUSED;
2135{
2136 return (abfd->symcount + 1) * sizeof (asymbol *);
2137}
2138
2139/* Sort mmo symbols by serial number. */
2140
2141static int
2142mmo_sort_mmo_symbols (arg1, arg2)
3f9c735e
AM		 2143 const PTR arg1;
2144 const PTR arg2;
3c3bdf30 2145{
3f9c735e
AM		 2146 const struct mmo_symbol *sym1 = *(const struct mmo_symbol **) arg1;
2147 const struct mmo_symbol *sym2 = *(const struct mmo_symbol **) arg2;
3c3bdf30
NC		 2148
2149 /* Sort by serial number first. */
2150 if (sym1->serno < sym2->serno)
2151 return -1;
2152 else if (sym1->serno > sym2->serno)
2153 return 1;
2154
2155 /* Then sort by address of the table entries. */
3f9c735e 2156 return ((const char *) arg1 - (const char *) arg2);
3c3bdf30
NC		 2157}
2158
2159/* Translate the symbol table. */
2160
2161static long
2162mmo_get_symtab (abfd, alocation)
2163 bfd *abfd;
2164 asymbol **alocation;
2165{
2166 unsigned int symcount = bfd_get_symcount (abfd);
2167 asymbol *csymbols;
2168 unsigned int i;
2169
2170 csymbols = abfd->tdata.mmo_data->csymbols;
2171 if (csymbols == NULL)
2172 {
2173 asymbol *c;
2174 struct mmo_symbol *s;
2175 struct mmo_symbol **msp;
2176
2177 /* First we store the symbols into the table we'll return, then we
2178 qsort it on the serial number, with secondary on the address of
2179 the symbol, to preserve order if there would be non-unique serial
2180 numbers. */
2181 for (s = abfd->tdata.mmo_data->symbols,
2182 msp = (struct mmo_symbol **) alocation;
2183 s != NULL;
2184 s = s->next, ++msp)
2185 *msp = s;
2186
2187 *msp = NULL;
2188
2189 qsort (alocation, symcount, sizeof (struct mmo_symbol *),
2190 mmo_sort_mmo_symbols);
2191
2192 csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol));
2193 if (csymbols == NULL && symcount != 0)
2194 return false;
2195 abfd->tdata.mmo_data->csymbols = csymbols;
2196
2197 for (msp = (struct mmo_symbol **) alocation, c = csymbols;
2198 *msp != NULL;
2199 msp++, ++c)
2200 {
2201 s = *msp;
2202 c->the_bfd = abfd;
2203 c->name = s->name;
2204 c->value = s->value;
2205 c->flags = BSF_GLOBAL;
2206
2207 if (s->sym_type == mmo_data_sym)
2208 {
2209 c->section
2210 = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME);
2211
2212 if (c->section == NULL)
2213 c->section = bfd_abs_section_ptr;
2214 else
2215 c->value -= c->section->vma;
2216 }
2217 else if (s->sym_type == mmo_undef_sym)
2218 c->section = bfd_und_section_ptr;
2219 else if (s->sym_type == mmo_reg_sym)
2220 {
2221 c->section
2222 = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME);
2223 }
2224 else
2225 {
2226 asection *textsec
2227 = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME);
2228
2229 if (textsec != NULL
2230 && c->value >= textsec->vma
2231 && c->value <= textsec->vma + textsec->_cooked_size)
2232 {
2233 c->section = textsec;
2234 c->value -= c->section->vma;
2235 }
2236 else
2237 c->section = bfd_abs_section_ptr;
2238 }
2239
2240 c->udata.p = NULL;
2241 }
2242 }
2243
2244 /* Last, overwrite the incoming table with the right-type entries. */
2245 for (i = 0; i < symcount; i++)
2246 *alocation++ = csymbols++;
2247 *alocation = NULL;
2248
2249 return symcount;
2250}
2251
3c3bdf30
NC		 2252/* Get information about a symbol. */
2253
2254static void
2255mmo_get_symbol_info (ignore_abfd, symbol, ret)
2256 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2257 asymbol *symbol;
2258 symbol_info *ret;
2259{
2260 bfd_symbol_info (symbol, ret);
2261}
2262
2263static void
2264mmo_print_symbol (abfd, afile, symbol, how)
2265 bfd *abfd;
2266 PTR afile;
2267 asymbol *symbol;
2268 bfd_print_symbol_type how;
2269{
2270 FILE *file = (FILE *) afile;
2271
2272 switch (how)
2273 {
2274 case bfd_print_symbol_name:
2275 fprintf (file, "%s", symbol->name);
2276 break;
2277 default:
2278 bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
2279
2280 fprintf (file, " %-5s %s",
2281 symbol->section->name,
2282 symbol->name);
2283 }
2284}
2285
2286/* We can't map a file directly into executable code, so the
2287 size of header information is irrelevant. */
2288
2289static int
2290mmo_sizeof_headers (abfd, exec)
2291 bfd *abfd ATTRIBUTE_UNUSED;
2292 boolean exec ATTRIBUTE_UNUSED;
2293{
2294 return 0;
2295}
2296
2297/* Write the (section-neutral) file preamble. */
2298
2299static boolean
2300mmo_internal_write_header (abfd)
2301 bfd *abfd;
2302{
3f9c735e 2303 const char lop_pre_bfd[] = { LOP, LOP_PRE, 1, 1};
3c3bdf30
NC		 2304
2305 if (bfd_bwrite (lop_pre_bfd, 4, abfd) != 4)
2306 return false;
2307
2308 /* Copy creation time of original file. */
2309 if (bfd_bwrite (abfd->tdata.mmo_data->created, 4, abfd) != 4)
2310 return false;
2311
2312 return true;
2313}
2314
2315/* Write the LOP_POST record, with global register initializations.
2316 Z is the Z field of the LOP_POST, corresponding to 255 - number of
2317 registers at DATA. The Z = 255 field is filled in with the
2318 start-address. */
2319
2320static boolean
2321mmo_internal_write_post (abfd, z, sec)
2322 bfd *abfd;
2323 int z;
2324 asection *sec;
2325{
2326 int i;
2327 bfd_byte buf[8];
2328 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_POST << 16) | z);
2329
2330 for (i = z; i < 255; i++)
2331 {
2332 bfd_byte *data = mmo_get_loc (sec, i * 8, 8);
2333
2334 if (bfd_bwrite (data, 8, abfd) != 8)
2335 return false;
2336 }
2337
2338 /* For Z == $255, we always emit the start location; supposedly Main,
2339 but we have it handy at bfd_get_start_address. If we're called with
2340 Z == 255, don't assume DATA is valid. */
2341 bfd_put_64 (abfd, bfd_get_start_address (abfd), buf);
2342
82e51918 2343 return ! abfd->tdata.mmo_data->have_error && bfd_bwrite (buf, 8, abfd) == 8;
3c3bdf30
NC		 2344}
2345
2346/* Translate to and from BFD flags. This is to make sure that we don't
2347 get bitten by BFD flag number changes. */
2348
2349static flagword
2350mmo_sec_flags_from_bfd_flags (flags)
2351 flagword flags;
2352{
2353 flagword oflags = 0;
2354
2355 if (flags & SEC_ALLOC)
2356 oflags |= MMO_SEC_ALLOC;
2357 if (flags & SEC_LOAD)
2358 oflags |= MMO_SEC_LOAD;
2359 if (flags & SEC_RELOC)
2360 oflags |= MMO_SEC_RELOC;
2361 if (flags & SEC_READONLY)
2362 oflags |= MMO_SEC_READONLY;
2363 if (flags & SEC_CODE)
2364 oflags |= MMO_SEC_CODE;
2365 if (flags & SEC_DATA)
2366 oflags |= MMO_SEC_DATA;
2367 if (flags & SEC_NEVER_LOAD)
2368 oflags |= MMO_SEC_NEVER_LOAD;
2369 if (flags & SEC_IS_COMMON)
2370 oflags |= MMO_SEC_IS_COMMON;
2371 if (flags & SEC_DEBUGGING)
2372 oflags |= MMO_SEC_DEBUGGING;
2373
2374 return oflags;
2375}
2376
2377static flagword
2378bfd_sec_flags_from_mmo_flags (flags)
2379 flagword flags;
2380{
2381 flagword oflags = 0;
2382
2383 if (flags & MMO_SEC_ALLOC)
2384 oflags |= SEC_ALLOC;
2385 if (flags & MMO_SEC_LOAD)
2386 oflags |= SEC_LOAD;
2387 if (flags & MMO_SEC_RELOC)
2388 oflags |= SEC_RELOC;
2389 if (flags & MMO_SEC_READONLY)
2390 oflags |= SEC_READONLY;
2391 if (flags & MMO_SEC_CODE)
2392 oflags |= SEC_CODE;
2393 if (flags & MMO_SEC_DATA)
2394 oflags |= SEC_DATA;
2395 if (flags & MMO_SEC_NEVER_LOAD)
2396 oflags |= SEC_NEVER_LOAD;
2397 if (flags & MMO_SEC_IS_COMMON)
2398 oflags |= SEC_IS_COMMON;
2399 if (flags & MMO_SEC_DEBUGGING)
2400 oflags |= SEC_DEBUGGING;
2401
2402 return oflags;
2403}
2404
2405/* Write a section. */
2406
2407static boolean
2408mmo_internal_write_section (abfd, sec)
2409 bfd *abfd;
2410 asection *sec;
2411{
2412 /* We do it differently depending on what section this is:
2413
2414 ".text": Output, prepended by information about the first source file
2415 (not yet implemented.)
2416
2417 ".data": Output.
2418
2419 (".MMIX.reg_contents": Not handled here.)
2420
2421 Anything else: Output inside a lop_spec 80, in the format described
2422 above. */
2423
2424 if (strcmp (sec->name, MMO_TEXT_SECTION_NAME) == 0)
2425 /* FIXME: Output source file name and line number. */
2426 return
2427 mmo_write_loc_chunk_list (abfd,
2428 ((struct mmo_section_data_struct *)
2429 (sec->used_by_bfd))->head);
2430 else if (strcmp (sec->name, MMO_DATA_SECTION_NAME) == 0)
2431 return
2432 mmo_write_loc_chunk_list (abfd,
2433 ((struct mmo_section_data_struct *)
2434 (sec->used_by_bfd))->head);
2435 else if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0)
2436 /* Not handled here. */
2437 {
2438 /* This would normally be an abort call since this can't happen, but
2439 we don't do that. */
2440 bfd_set_error (bfd_error_bad_value);
2441 return false;
2442 }
2443 else if (strncmp (sec->name, MMIX_OTHER_SPEC_SECTION_PREFIX,
2444 strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)) == 0)
2445 {
2446 int n = atoi (sec->name + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX));
2447 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_SPEC << 16) | n);
82e51918
AM		 2448 return (! abfd->tdata.mmo_data->have_error
2449 && mmo_write_chunk_list (abfd,
2450 ((struct mmo_section_data_struct *)
2451 (sec->used_by_bfd))->head));
3c3bdf30
NC		 2452 }
2453 /* Ignore sections that are just allocated or empty; we write out
2454 _contents_ here. */
2455 else if ((bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) != 0
2456 && sec->_raw_size != 0)
2457 {
2458 /* Keep the document-comment formatted the way it is. */
2459/*
2460INODE
2461mmo section mapping, , Symbol-table, mmo
2462SUBSECTION
2463 mmo section mapping
2464
2465 The implementation in BFD uses special data type 80 (decimal) to
2466 encapsulate and describe named sections, containing e.g.@: debug
2467 information. If needed, any datum in the encapsulation will be
2468 quoted using lop_quote. First comes a 32-bit word holding the
2469 number of 32-bit words containing the zero-terminated zero-padded
2470 segment name. After the name there's a 32-bit word holding flags
2471 describing the section type. Then comes a 64-bit big-endian word
2472 with the section length (in bytes), then another with the section
2473 start address. Depending on the type of section, the contents
2474 might follow, zero-padded to 32-bit boundary. For a loadable
2475 section (such as data or code), the contents might follow at some
2476 later point, not necessarily immediately, as a lop_loc with the
2477 same start address as in the section description, followed by the
2478 contents. This in effect forms a descriptor that must be emitted
2479 before the actual contents. Sections described this way must not
2480 overlap.
2481
2482 For areas that don't have such descriptors, synthetic sections are
2483 formed by BFD. Consecutive contents in the two memory areas
2484 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} and
2485 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} are entered in
2486 sections named <<.text>> and <<.data>> respectively. If an area
2487 is not otherwise described, but would together with a neighboring
2488 lower area be less than @samp{0x40000000} bytes long, it is joined
2489 with the lower area and the gap is zero-filled. For other cases,
2490 a new section is formed, named <<.MMIX.sec.@var{n}>>. Here,
2491 @var{n} is a number, a running count through the mmo file,
2492 starting at 0.
2493
2494EXAMPLE
2495 A loadable section specified as:
2496
2497| .section secname,"ax"
2498| TETRA 1,2,3,4,-1,-2009
2499| BYTE 80
2500
2501 and linked to address @samp{0x4}, is represented by the sequence:
2502
2503| 0x98080050 - lop_spec 80
2504| 0x00000002 - two 32-bit words for the section name
2505| 0x7365636e - "secn"
2506| 0x616d6500 - "ame\0"
2507| 0x00000033 - flags CODE, READONLY, LOAD, ALLOC
2508| 0x00000000 - high 32 bits of section length
2509| 0x0000001c - section length is 28 bytes; 6 * 4 + 1 + alignment to 32 bits
2510| 0x00000000 - high 32 bits of section address
2511| 0x00000004 - section address is 4
2512| 0x98010002 - 64 bits with address of following data
dfa36a69
HPN		 2513| 0x00000000 - high 32 bits of address
2514| 0x00000004 - low 32 bits: data starts at address 4
3c3bdf30
NC		 2515| 0x00000001 - 1
2516| 0x00000002 - 2
2517| 0x00000003 - 3
2518| 0x00000004 - 4
2519| 0xffffffff - -1
2520| 0xfffff827 - -2009
2521| 0x50000000 - 80 as a byte, padded with zeros.
2522
2523 Note that the lop_spec wrapping does not include the section
2524 contents. Compare this to a non-loaded section specified as:
2525
2526| .section thirdsec
2527| TETRA 200001,100002
2528| BYTE 38,40
2529
2530 This, when linked to address @samp{0x200000000000001c}, is
2531 represented by:
2532
2533| 0x98080050 - lop_spec 80
2534| 0x00000002 - two 32-bit words for the section name
2535| 0x7365636e - "thir"
2536| 0x616d6500 - "dsec"
2537| 0x00000010 - flag READONLY
2538| 0x00000000 - high 32 bits of section length
2539| 0x0000000c - section length is 12 bytes; 2 * 4 + 2 + alignment to 32 bits
dfa36a69
HPN		 2540| 0x20000000 - high 32 bits of address
2541| 0x0000001c - low 32 bits of address 0x200000000000001c
3c3bdf30
NC		 2542| 0x00030d41 - 200001
2543| 0x000186a2 - 100002
2544| 0x26280000 - 38, 40 as bytes, padded with zeros
2545
dfa36a69 2546 For the latter example, the section contents must not be
3c3bdf30
NC		 2547 loaded in memory, and is therefore specified as part of the
2548 special data. The address is usually unimportant but might
2549 provide information for e.g.@: the DWARF 2 debugging format. */
2550
2551 mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION);
2552 mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4);
2553 mmo_write_chunk (abfd, sec->name, strlen (sec->name));
dfa36a69 2554 mmo_flush_chunk (abfd);
3c3bdf30
NC		 2555 /* FIXME: We can get debug sections (.debug_line & Co.) with a
2556 section flag still having SEC_RELOC set. Investigate. This
2557 might be true for all alien sections; perhaps mmo.em should clear
2558 that flag. Might be related to weak references. */
2559 mmo_write_tetra (abfd,
2560 mmo_sec_flags_from_bfd_flags
2561 (bfd_get_section_flags (abfd, sec)));
2562 mmo_write_octa (abfd, sec->_raw_size);
2563 mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec));
2564
2565 /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually
2566 loaded. */
2567 if (bfd_get_section_flags (abfd, sec) & SEC_LOAD)
82e51918
AM		 2568 return
2569 ! abfd->tdata.mmo_data->have_error
3c3bdf30
NC		 2570 && mmo_write_loc_chunk_list (abfd,
2571 ((struct mmo_section_data_struct *)
2572 (sec->used_by_bfd))->head);
2573 return
82e51918 2574 ! abfd->tdata.mmo_data->have_error
3c3bdf30
NC		 2575 && mmo_write_chunk_list (abfd,
2576 ((struct mmo_section_data_struct *)
2577 (sec->used_by_bfd))->head);
2578 }
2579 return true;
2580}
2581
2582/* We save up all data before output. */
2583
2584static boolean
2585mmo_set_section_contents (abfd, sec, location, offset, bytes_to_do)
2586 bfd *abfd ATTRIBUTE_UNUSED;
2587 sec_ptr sec;
2588 PTR location;
2589 file_ptr offset;
2590 bfd_size_type bytes_to_do;
2591{
2592 /* Iterate over diminishing chunk sizes, copying contents. */
2593 while (bytes_to_do)
2594 {
2595 /* A minor song-and-dance to make sure we're not bitten by the
2596 distant possibility of the cast from bfd_vma to int making the
2597 chunk zero-sized. */
2598 int chunk_size
2599 = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE;
2600 bfd_byte *loc;
2601
2602 do
2603 loc = mmo_get_loc (sec, sec->vma + offset, chunk_size);
2604 while (loc == NULL && (chunk_size /= 2) != 0);
2605
2606 if (chunk_size == 0)
2607 return false;
2608
2609 memcpy (loc, location, chunk_size);
2610
2611 location += chunk_size;
2612 bytes_to_do -= chunk_size;
2613 offset += chunk_size;
2614 }
2615 return true;
2616}
2617
2618/* Add a symbol to a trie-tree. */
2619
2620static boolean
2621mmo_internal_add_3_sym (abfd, rootp, symp)
2622 bfd *abfd;
2623 struct mmo_symbol_trie *rootp;
3f9c735e 2624 const struct mmo_symbol *symp;
3c3bdf30 2625{
3f9c735e 2626 const char *name = symp->name;
3c3bdf30
NC		 2627 struct mmo_symbol_trie *trie = rootp;
2628 struct mmo_symbol_trie **triep = NULL;
2629
2630 while (*name && trie != NULL)
2631 {
2632 if (*name < trie->symchar)
2633 {
2634 triep = &trie->left;
2635 trie = trie->left;
2636 }
2637 else if (*name > trie->symchar)
2638 {
2639 triep = &trie->right;
2640 trie = trie->right;
2641 }
2642 else if (*name == trie->symchar)
2643 {
2644 triep = &trie->middle;
2645 name++;
2646
2647 /* Make sure "trie" points to where we should fill in the
2648 current symbol whenever we've iterated through "name". We
2649 would lose the right position if we encounter "foobar" then
2650 "foo". */
2651 if (*name)
2652 trie = trie->middle;
2653 }
2654 }
2655
2656 while (*name != 0)
2657 {
2658 /* Create middle branches for the rest of the characters. */
2659 trie = bfd_zalloc (abfd, sizeof (struct mmo_symbol_trie));
2660 *triep = trie;
2661 trie->symchar = *name++;
2662 triep = &trie->middle;
2663 }
2664
2665 /* We discover a duplicate symbol rather late in the process, but still;
2666 we discover it and bail out. */
2667 if (trie->sym.name != NULL)
2668 {
2669 (*_bfd_error_handler)
2670 (_("%s: invalid symbol table: duplicate symbol `%s'\n"),
2671 bfd_get_filename (abfd), trie->sym.name);
2672 bfd_set_error (bfd_error_bad_value);
2673 return false;
2674 }
2675
2676 memcpy (&trie->sym, symp, sizeof *symp);
2677 return true;
2678}
2679
2680/* Find out the length of the serialized version of a trie in bytes. */
2681
2682static unsigned int
2683mmo_internal_3_length (abfd, trie)
2684 bfd *abfd;
2685 struct mmo_symbol_trie *trie;
2686{
2687 /* First, one for the control byte. */
2688 unsigned int length = 1;
2689
2690 if (trie == NULL)
2691 return 0;
2692
2693 /* Add in the recursion to the left. */
2694 length += mmo_internal_3_length (abfd, trie->left);
2695
2696 /* Add in the middle trie and the character. */
2697 length += 1 + mmo_internal_3_length (abfd, trie->middle);
2698
2699 /* Add in the recursion to the right. */
2700 length += mmo_internal_3_length (abfd, trie->right);
2701
2702 /* Add in bytes for the symbol (if this is an endnode). */
2703 if (trie->sym.name != NULL)
2704 {
2705 unsigned int serno = trie->sym.serno;
2706
2707 /* First what it takes to encode the value. */
2708 if (trie->sym.sym_type == mmo_reg_sym)
2709 length++;
2710 else if (trie->sym.sym_type == mmo_undef_sym)
2711 length += 2;
2712 else
2713 {
2714 bfd_vma value = trie->sym.value;
2715
2716 /* Coded in one to eight following bytes. */
2717 if (trie->sym.sym_type == mmo_data_sym)
2718 value -= (bfd_vma) 0x20 << 56;
2719
2720 do
2721 {
2722 value >>= 8;
2723 length++;
2724 }
2725 while (value != 0);
2726 }
2727
2728 /* Find out what it takes to encode the serial number. */
2729 do
2730 {
2731 serno >>= 7;
2732 length++;
2733 }
2734 while (serno != 0);
2735 }
2736
2737 return length;
2738}
2739
2740/* Helper function for outputting the serial number of a symbol, output as
2741 a variant of leb128 (see dwarf2 documentation) which could be called
2742 beb128. Using a helper function and recursion simplifies debugging. */
2743
2744static void
2745mmo_beb128_out (abfd, serno, marker)
2746 bfd *abfd;
2747 int serno;
2748 int marker;
2749{
2750 if (serno & ~0x7f)
2751 mmo_beb128_out (abfd, serno >> 7, 0);
2752 mmo_write_byte (abfd, marker | (serno & 0x7f));
2753}
2754
2755/* Serialize a trie. */
2756
2757static void
2758mmo_internal_3_dump (abfd, trie)
2759 bfd *abfd;
2760 struct mmo_symbol_trie *trie;
2761{
2762 bfd_byte control = 0;
2763
2764 if (trie == NULL)
2765 return;
2766
2767 if (trie->left)
2768 control |= MMO3_LEFT;
2769
2770 if (trie->middle)
2771 control |= MMO3_MIDDLE;
2772
2773 if (trie->right)
2774 control |= MMO3_RIGHT;
2775
2776 if (trie->sym.name != NULL)
2777 {
2778 /* Encode the symbol type and length of value bytes. */
2779 if (trie->sym.sym_type == mmo_reg_sym)
2780 control |= MMO3_REGQUAL_BITS;
2781 else if (trie->sym.sym_type == mmo_undef_sym)
2782 control |= MMO3_UNDEF;
2783 else
2784 {
2785 bfd_vma value = trie->sym.value;
2786
2787 /* Coded in 1..8 following bytes. */
2788 if (trie->sym.sym_type == mmo_data_sym)
2789 {
2790 control |= MMO3_DATA;
2791 value -= (bfd_vma) 0x20 << 56;
2792 }
2793
2794 do
2795 {
2796 value >>= 8;
2797 control++;
2798 }
2799 while (value != 0);
2800 }
2801 }
2802
2803 /* The control byte is output before recursing. */
2804 mmo_write_byte (abfd, control);
2805
2806 mmo_internal_3_dump (abfd, trie->left);
2807
2808 if (control & MMO3_SYMBITS)
2809 {
2810 mmo_write_byte (abfd, trie->symchar);
2811
2812 if (trie->sym.name != NULL)
2813 {
2814 if (trie->sym.sym_type == mmo_reg_sym)
2815 mmo_write_byte (abfd, trie->sym.value);
2816 else if (trie->sym.sym_type == mmo_undef_sym)
2817 {
2818 mmo_write_byte (abfd, 0);
2819 mmo_write_byte (abfd, 0);
2820 }
2821 else
2822 {
2823 bfd_vma value = trie->sym.value;
2824
2825 bfd_byte byte_n = control & 15;
2826
2827 /* Coded in 1..8 following bytes. Note that the value is
2828 shifted out big-endian. */
2829 if (trie->sym.sym_type == mmo_data_sym)
2830 {
2831 value -= (bfd_vma) 0x20 << 56;
2832 byte_n -= 8;
2833 }
2834
2835 do
2836 {
2837 mmo_write_byte (abfd, (value >> ((byte_n - 1) * 8)) & 0xff);
2838 byte_n--;
2839 }
2840 while (byte_n != 0);
2841 }
2842
2843 mmo_beb128_out (abfd, trie->sym.serno, 128);
2844 }
2845 mmo_internal_3_dump (abfd, trie->middle);
2846 }
2847 mmo_internal_3_dump (abfd, trie->right);
2848}
2849
dfa36a69 2850/* Write symbols in mmo format. Also write the lop_end terminator. */
3c3bdf30
NC		 2851
2852static boolean
2853mmo_write_symbols_and_terminator (abfd)
2854 bfd *abfd;
2855{
2856 int count = bfd_get_symcount (abfd);
dfa36a69 2857 asymbol *maintable[2];
3c3bdf30 2858 asymbol **table;
dfa36a69
HPN		 2859 asymbol **orig_table = bfd_get_outsymbols (abfd);
2860 int serno;
3c3bdf30
NC		 2861 struct mmo_symbol_trie root;
2862 int trie_len;
2863 int i;
2864 bfd_byte buf[4];
2865
2866 /* Create a symbol for "Main". */
dfa36a69 2867 asymbol *fakemain = bfd_make_empty_symbol (abfd);
3c3bdf30 2868
dfa36a69
HPN		 2869 fakemain->flags = BSF_GLOBAL;
2870 fakemain->value = bfd_get_start_address (abfd);
2871 fakemain->name = MMIX_START_SYMBOL_NAME;
2872 fakemain->section = bfd_abs_section_ptr;
2873 maintable[0] = fakemain;
2874 maintable[1] = NULL;
3c3bdf30
NC		 2875
2876 memset (&root, 0, sizeof (root));
2877
2878 /* Make all symbols take a left turn. */
2879 root.symchar = 0xff;
2880
dfa36a69
HPN		 2881 /* There must always be a ":Main", so we'll add one if there are no
2882 symbols. Make sure we have room for it. */
2883 table = bfd_alloc (abfd, (count + 1) * sizeof (asymbol *));
2884 if (table == NULL)
2885 return false;
2886
2887 memcpy (table, orig_table, count * sizeof (asymbol *));
2888
2889 /* Move :Main (if there is one) to the first position. This is
2890 necessary to get the same layout of the trie-tree when linking as
2891 when objcopying the result as in the objcopy.exp test "simple objcopy
2892 of executable". It also automatically takes care of assigning serial
2893 number 1 to :Main (as is mandatory). */
2894 for (i = 0; i < count; i++)
2895 if (table[i] != NULL
2896 && strcmp (table[i]->name, MMIX_START_SYMBOL_NAME) == 0
2897 && (table[i]->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL)
2898 {
2899 asymbol *mainsym = table[i];
2900 memcpy (table + 1, orig_table, i * sizeof (asymbol *));
2901 table[0] = mainsym;
2902
2903 /* Check that the value assigned to :Main is the same as the entry
2904 address. The default linker script asserts this. This is as
2905 good a place as any to check this consistency. */
2906 if ((mainsym->value
2907 + mainsym->section->output_section->vma
2908 + mainsym->section->output_offset)
2909 != bfd_get_start_address (abfd))
2910 {
2911 /* Arbitrary buffer to hold the printable representation of a
2912 vma. */
2913 char vmas_main[40];
2914 char vmas_start[40];
2915 bfd_vma vma_start = bfd_get_start_address (abfd);
2916
2917 sprintf_vma (vmas_main, mainsym->value);
2918 sprintf_vma (vmas_start, vma_start);
2919
2920 (*_bfd_error_handler)
2921 (_("%s: Bad symbol definition: `Main' set to %s rather\
2922 than the start address %s\n"),
2923 bfd_get_filename (abfd), vmas_main, vmas_start);
2924 bfd_set_error (bfd_error_bad_value);
2925 return false;
2926 }
2927 break;
2928 }
2929 if (i == count && count != 0)
3c3bdf30 2930 {
dfa36a69
HPN		 2931 /* When there are symbols, there must be a :Main. There was no
2932 :Main, so we need to add it manually. */
2933 memcpy (table + 1, orig_table, count * sizeof (asymbol *));
2934 table[0] = fakemain;
2935 count++;
3c3bdf30 2936 }
3c3bdf30 2937
dfa36a69 2938 for (i = 0, serno = 1; i < count && table[i] != NULL; i++)
3c3bdf30
NC		 2939 {
2940 asymbol *s = table[i];
2941
2942 /* It's not enough to consult bfd_is_local_label, since it does not
2943 mean "local" in the sense of linkable-and-observable-after-link.
2944 Let's just check the BSF_GLOBAL flag.
2945
2946 Also, don't export symbols with characters not in the allowed set. */
2947 if ((s->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL
2948 && strspn (s->name,
2949 valid_mmo_symbol_character_set) == strlen (s->name))
2950 {
2951 struct mmo_symbol sym;
2952 memset (&sym, 0, sizeof (sym));
2953
2954 sym.name = s->name;
2955 sym.value =
2956 s->value
2957 + s->section->output_section->vma
2958 + s->section->output_offset;
2959
2960 if (bfd_is_und_section (s->section))
2961 sym.sym_type = mmo_undef_sym;
2962 else if (strcmp (s->section->name, MMO_DATA_SECTION_NAME) == 0
2963 /* The encoding of data symbols require that the "rest"
2964 of the value fits in 6 bytes, so the upper two bytes
2965 must be 0x2000. All other symbols get to be the
2966 absolute type. */
2967 && (sym.value >> 48) == 0x2000)
2968 sym.sym_type = mmo_data_sym;
2969 else if (strcmp (s->section->name, MMIX_REG_SECTION_NAME) == 0)
2970 sym.sym_type = mmo_reg_sym;
2971 else if (strcmp (s->section->name,
2972 MMIX_REG_CONTENTS_SECTION_NAME) == 0)
2973 {
2974 sym.sym_type = mmo_reg_sym;
2975 sym.value /= 8;
2976 }
2977 else
2978 sym.sym_type = mmo_abs_sym;
2979
2980 /* FIXME: We assume the order of the received symbols is an
2981 ordered mapping of the serial numbers. This is not
2982 necessarily true if we e.g. objcopy a mmo file to another and
dfa36a69 2983 there are gaps in the numbering. Not sure if this can
3c3bdf30 2984 happen. Not sure what to do. */
dfa36a69 2985 sym.serno = serno++;
3c3bdf30
NC		 2986
2987 if (! mmo_internal_add_3_sym (abfd, &root, &sym))
2988 return false;
2989 }
2990 }
2991
2992 /* Change the root node to be a ":"-prefix. */
2993 root.symchar = ':';
2994 root.middle = root.left;
2995 root.right = NULL;
2996 root.left = NULL;
2997
2998 /* We have to find out if we can fit the whole symbol table in the mmo
2999 symtab. It would be bad to assume we can always fit it in 262144
3000 bytes. If we can't, just leave the Main symbol. */
3001 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4;
3002
3003 if (trie_len > 0xffff)
3004 {
3005 /* Test this code by using a lower limit in the test above and check
3006 that the single "Main" symbol is emitted and handled properly.
3007 There's no specific test-case. */
3008 struct mmo_symbol sym;
3009
3010 (*_bfd_error_handler)
3011 (_("%s: warning: symbol table too large for mmo, larger than 65535\
3012 32-bit words: %d. Only `Main' will be emitted.\n"),
3013 bfd_get_filename (abfd), trie_len);
3014
3015 memset (&sym, 0, sizeof (sym));
3016 sym.sym_type = mmo_abs_sym;
3017 sym.name = MMIX_START_SYMBOL_NAME;
3018 sym.serno = 1;
3019 sym.value = bfd_get_start_address (abfd);
3020
3021 /* Then patch up a symbol table to be just the ":Main" symbol. */
3022 memset (&root, 0, sizeof (root));
3023 root.left = root.middle;
3024 root.symchar = 0xff;
3025 root.middle = NULL;
3026 root.right = NULL;
3027
3028 if (! mmo_internal_add_3_sym (abfd, &root, &sym))
3029 return false;
3030
3031 root.symchar = ':';
3032 root.middle = root.left;
3033 root.right = NULL;
3034 root.left = NULL;
3035
3036 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4;
3037 }
3038
3039 /* Reset the written-bytes counter. */
3040 abfd->tdata.mmo_data->byte_no = 0;
3041
3042 /* Put out the lop_stab mark. */
3043 bfd_put_32 (abfd, (LOP << 24) | (LOP_STAB << 16), buf);
3044 if (bfd_bwrite (buf, 4, abfd) != 4)
3045 return false;
3046
3047 /* Dump out symbols. */
3048 mmo_internal_3_dump (abfd, &root);
3049
3050 if (trie_len != (abfd->tdata.mmo_data->byte_no + 3)/4)
3051 {
3052 /* I haven't seen this trig. It seems no use claiming this case
3053 isn't debugged and abort if we get here. Instead emit a
3054 diagnostic and fail "normally". */
3055 (*_bfd_error_handler)
3056 (_("%s: internal error, symbol table changed size from %d to %d\
3057 words\n"),
3058 bfd_get_filename (abfd), trie_len,
3059 (abfd->tdata.mmo_data->byte_no + 3)/4);
3060 bfd_set_error (bfd_error_bad_value);
3061 return false;
3062 }
3063
3064 /* Dump out remaining bytes in the buffer and handle I/O errors by
3065 propagating errors. */
3066 if ((abfd->tdata.mmo_data->byte_no % 4) != 0
3067 || abfd->tdata.mmo_data->have_error)
3068 {
3069 memset (abfd->tdata.mmo_data->buf + (abfd->tdata.mmo_data->byte_no % 4),
3070 0, 4 - (abfd->tdata.mmo_data->byte_no % 4));
3071
3072 if (abfd->tdata.mmo_data->have_error
3073 || bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4)
3074 return false;
3075 }
3076
3077 bfd_put_32 (abfd, (LOP << 24) | (LOP_END << 16) | trie_len, buf);
3078 return bfd_bwrite (buf, 4, abfd) == 4;
3079}
3080
3081/* Write section unless it is the register contents section. For that, we
3082 instead store the section in the supplied pointer. This function is
3083 used through bfd_map_over_sections. */
3084
3085static void
3086mmo_write_section_unless_reg_contents (abfd, sec, p)
3087 bfd *abfd;
3088 asection *sec;
3089 PTR p;
3090{
3091 struct mmo_write_sec_info *infop = (struct mmo_write_sec_info *) p;
3092
82e51918 3093 if (! infop->retval)
3c3bdf30
NC		 3094 return;
3095
3096 if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0)
3097 {
3098 infop->reg_section = sec;
3099 return;
3100 }
3101
3102 /* Exclude the convenience register section. */
3103 if (strcmp (sec->name, MMIX_REG_SECTION_NAME) == 0)
3104 {
3105 if (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)
3106 {
3107 /* Make sure it hasn't got contents. It seems impossible to
3108 make it carry contents, so we don't have a test-case for
3109 this. */
3110 (*_bfd_error_handler)
3111 (_("%s: internal error, internal register section %s had\
3112 contents\n"),
3113 bfd_get_filename (abfd), sec->name);
3114 bfd_set_error (bfd_error_bad_value);
3115 infop->retval = false;
3116 return;
3117 }
3118
3119 return;
3120 }
3121
3122 infop->retval = mmo_internal_write_section (abfd, sec);
3123}
3124
3125/* Do the actual output of a file. Assumes mmo_set_section_contents is
3126 already called. */
3127
3128static boolean
3129mmo_write_object_contents (abfd)
3130 bfd *abfd;
3131{
3132 struct mmo_write_sec_info wsecinfo;
3133
3134 /* First, there are a few words of preamble. */
3135 if (! mmo_internal_write_header (abfd))
3136 return false;
3137
3138 wsecinfo.reg_section = NULL;
3139 wsecinfo.retval = true;
3140
3141 bfd_map_over_sections (abfd, mmo_write_section_unless_reg_contents,
3142 (PTR) &wsecinfo);
3143
82e51918 3144 if (! wsecinfo.retval)
3c3bdf30
NC		 3145 return false;
3146
3147 if (wsecinfo.reg_section != NULL)
3148 {
3149 asection *sec = wsecinfo.reg_section;
3150 unsigned int z = (unsigned int) (sec->vma / 8);
3151
3152 /* Registers 0..31 must not be global. Do sanity check on the "vma"
3153 of the register contents section and check that it corresponds to
3154 the length of the section. */
3155 if (z < 32 || z >= 255 || (sec->vma & 7) != 0
3156 || sec->vma != 256 * 8 - sec->_raw_size - 8)
3157 {
3158 bfd_set_error (bfd_error_bad_value);
3159
3160 if (sec->_raw_size == 0)
3161 /* There must always be at least one such register. */
3162 (*_bfd_error_handler)
3163 (_("%s: no initialized registers; section length 0\n"),
3164 bfd_get_filename (abfd));
3165 else if (sec->vma > (256 - 32) * 8)
3166 /* Provide better error message for the case of too many
3167 global registers. */
3168 (*_bfd_error_handler)
3169 (_("%s: too many initialized registers; section length %ld\n"),
3170 bfd_get_filename (abfd),
3171 (long) sec->_raw_size);
3172 else
3173 (*_bfd_error_handler)
3174 (_("%s: invalid start address for initialized registers of\
3175 length %ld: 0x%lx%08lx\n"),
3176 bfd_get_filename (abfd),
3177 (long) sec->_raw_size,
3178 (unsigned long) (sec->vma >> 32), (unsigned long) (sec->vma));
3179
3180 return false;
3181 }
3182
3183 if (! mmo_internal_write_post (abfd, z, sec))
3184 return false;
3185 }
3186 else
3187 if (! mmo_internal_write_post (abfd, 255, NULL))
3188 return false;
3189
3190 return mmo_write_symbols_and_terminator (abfd);
3191}
3192
3193/* Return the size of a NULL pointer, so we support linking in an mmo
3194 object. */
3195
3196static long
3197mmo_get_reloc_upper_bound (abfd, sec)
3198 bfd *abfd ATTRIBUTE_UNUSED;
3199 asection *sec ATTRIBUTE_UNUSED;
3200{
3201 return sizeof (PTR);
3202}
3203
3204/* Similarly canonicalize relocs to empty, filling in the terminating NULL
3205 pointer. */
3206
3207long
3208mmo_canonicalize_reloc (abfd, section, relptr, symbols)
3209 bfd *abfd ATTRIBUTE_UNUSED;
3210 sec_ptr section ATTRIBUTE_UNUSED;
3211 arelent **relptr;
3212 asymbol **symbols ATTRIBUTE_UNUSED;
3213{
3214 *relptr = NULL;
3215 return 0;
3216}
3217
3218/* If there's anything in particular in a mmo bfd that we want to free,
3219 make this a real function. Only do this if you see major memory
3220 thrashing; zealous free:ing will cause unwanted behavior, especially if
3221 you "free" memory allocated with "bfd_alloc", or even "bfd_release" a
3222 block allocated with "bfd_alloc"; they're really allocated from an
3223 obstack, and we don't know what was allocated there since this
3224 particular allocation. */
3225
3226#define mmo_close_and_cleanup _bfd_generic_close_and_cleanup
3227#define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3228
3229/* Perhaps we need to adjust this one; mmo labels (originally) without a
3230 leading ':' might more appropriately be called local. */
3231#define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name
3232
3233/* Is this one really used or defined by anyone? */
3234#define mmo_get_lineno _bfd_nosymbols_get_lineno
3235
3236/* FIXME: We can do better on this one, if we have a dwarf2 .debug_line
3237 section or if MMO line numbers are implemented. */
3238#define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line
3f3c5c34 3239#define mmo_make_empty_symbol _bfd_generic_make_empty_symbol
3c3bdf30
NC		 3240#define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
3241#define mmo_read_minisymbols _bfd_generic_read_minisymbols
3242#define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3243
3244#define mmo_get_section_contents_in_window \
3245 _bfd_generic_get_section_contents_in_window
3246#define mmo_bfd_get_relocated_section_contents \
3247 bfd_generic_get_relocated_section_contents
3248#define mmo_bfd_gc_sections bfd_generic_gc_sections
3249#define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
e2d34d7d 3250#define mmo_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
3c3bdf30 3251#define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols
2d653fc7 3252#define mmo_bfd_link_just_syms _bfd_generic_link_just_syms
3c3bdf30
NC		 3253#define mmo_bfd_final_link _bfd_generic_final_link
3254#define mmo_bfd_link_split_section _bfd_generic_link_split_section
3255
3256/* Strictly speaking, only MMIX uses this restricted format, but let's not
3257 stop anybody from shooting themselves in the foot. */
3258#define mmo_set_arch_mach bfd_default_set_arch_mach
3259#define mmo_bfd_relax_section bfd_generic_relax_section
3260#define mmo_bfd_merge_sections bfd_generic_merge_sections
e61463e1 3261#define mmo_bfd_discard_group bfd_generic_discard_group
3c3bdf30
NC		 3262
3263/* objcopy will be upset if we return -1 from bfd_get_reloc_upper_bound by
3264 using BFD_JUMP_TABLE_RELOCS (_bfd_norelocs) rather than 0. FIXME: Most
3265 likely a bug in the _bfd_norelocs definition.
3266
3267 On the other hand, we smuggle in an mmo object (because setting up ELF
3268 is too cumbersome) when linking (from other formats, presumably ELF) to
3269 represent the g255 entry. We need to link that object, so need to say
3270 it has no relocs. Upper bound for the size of the relocation table is
3271 the size of a NULL pointer, and we support "canonicalization" for that
3272 pointer. */
3273#define mmo_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3274
3275/* We want to copy time of creation, otherwise we'd use
3276 BFD_JUMP_TABLE_COPY (_bfd_generic). */
3277#define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3278#define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3279#define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3280#define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3281#define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3282
3f9c735e 3283const bfd_target bfd_mmo_vec =
3c3bdf30
NC		 3284{
3285 "mmo", /* name */
3286 bfd_target_mmo_flavour,
3287 BFD_ENDIAN_BIG, /* target byte order */
3288 BFD_ENDIAN_BIG, /* target headers byte order */
3289
3290 /* FIXME: Might need adjustments. */
3291 (HAS_RELOC | EXEC_P | /* object flags */
3292 HAS_LINENO | HAS_DEBUG |
3293 HAS_SYMS | HAS_LOCALS | WP_TEXT),
3294
3295 /* FIXME: Might need adjustments. */
3296 (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
3297 | SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY),
3298 /* section flags */
3299 0, /* leading underscore */
3300 ' ', /* ar_pad_char */
3301 16, /* ar_max_namelen */
3302 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
3303 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
3304 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
3305 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
3306 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
3307 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
3308
3309 {
3310 _bfd_dummy_target,
3311 mmo_object_p, /* bfd_check_format */
3312 _bfd_dummy_target,
3313 _bfd_dummy_target,
3314 },
3315 {
3316 bfd_false,
3317 mmo_mkobject,
3318 bfd_false,
3319 bfd_false,
3320 },
3321 { /* bfd_write_contents */
3322 bfd_false,
3323 mmo_write_object_contents,
3324 bfd_false,
3325 bfd_false,
3326 },
3327
3328 BFD_JUMP_TABLE_GENERIC (mmo),
3329 BFD_JUMP_TABLE_COPY (mmo),
3330 BFD_JUMP_TABLE_CORE (_bfd_nocore),
3331 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
3332 BFD_JUMP_TABLE_SYMBOLS (mmo),
3333 /* We have to provide a valid method for getting relocs, returning zero,
3334 so we can't say BFD_JUMP_TABLE_RELOCS (_bfd_norelocs). */
3335 BFD_JUMP_TABLE_RELOCS (mmo),
3336 BFD_JUMP_TABLE_WRITE (mmo),
3337 BFD_JUMP_TABLE_LINK (mmo),
3338 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
3339
3340 NULL,
3341
3342 NULL
3343};
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