1 /* BFD back-end for mmo objects (MMIX-specific object-format).
2 Copyright (C) 2001-2021 Free Software Foundation, Inc.
3 Written by Hans-Peter Nilsson (hp@bitrange.com).
4 Infrastructure and other bits originally copied from srec.c and
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
29 The mmo object format is used exclusively together with Professor
30 Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator
31 @command{mmix} which is available at
32 @url{http://mmix.cs.hm.edu/src/index.html}
33 understands this format. That package also includes a combined
34 assembler and linker called @command{mmixal}. The mmo format has
35 no advantages feature-wise compared to e.g. ELF. It is a simple
36 non-relocatable object format with no support for archives or
37 debugging information, except for symbol value information and
38 line numbers (which is not yet implemented in BFD). See
39 @url{http://mmix.cs.hm.edu/} for more
40 information about MMIX. The ELF format is used for intermediate
41 object files in the BFD implementation.
43 @c We want to xref the symbol table node. A feature in "chew"
44 @c requires that "commands" do not contain spaces in the
45 @c arguments. Hence the hyphen in "Symbol-table".
49 @* mmo section mapping::
53 File layout, Symbol-table, mmo, mmo
57 The mmo file contents is not partitioned into named sections as
58 with e.g.@: ELF. Memory areas is formed by specifying the
59 location of the data that follows. Only the memory area
60 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so
61 it is used for code (and constants) and the area
62 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for
63 writable data. @xref{mmo section mapping}.
65 There is provision for specifying ``special data'' of 65536
66 different types. We use type 80 (decimal), arbitrarily chosen the
67 same as the ELF <<e_machine>> number for MMIX, filling it with
68 section information normally found in ELF objects. @xref{mmo
71 Contents is entered as 32-bit words, xor:ed over previous
72 contents, always zero-initialized. A word that starts with the
73 byte @samp{0x98} forms a command called a @samp{lopcode}, where
74 the next byte distinguished between the thirteen lopcodes. The
75 two remaining bytes, called the @samp{Y} and @samp{Z} fields, or
76 the @samp{YZ} field (a 16-bit big-endian number), are used for
77 various purposes different for each lopcode. As documented in
78 @url{http://mmix.cs.hm.edu/doc/mmixal.pdf},
83 0x98000001. The next word is contents, regardless of whether it
84 starts with 0x98 or not.
87 0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location
88 directive, setting the location for the next data to the next
89 32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}),
90 plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment
91 and 2 for the data segment. Beware that the low bits of non-
92 tetrabyte-aligned values are silently discarded when being
93 automatically incremented and when storing contents (in contrast
94 to e.g. its use as current location when followed by lop_fixo
95 et al before the next possibly-quoted tetrabyte contents).
98 0x9802YYZZ. Increase the current location by @samp{YZ} bytes.
101 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location
102 as 64 bits into the location pointed to by the next 32-bit
103 (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y *
107 0x9804YYZZ. @samp{YZ} is stored into the current location plus
111 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from
112 the following 32-bit word are used in a manner similar to
113 @samp{YZ} in lop_fixr: it is xor:ed into the current location
114 minus @math{4 * L}. The first byte of the word is 0 or 1. If it
115 is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0,
116 then @math{L = (@var{lowest 24 bits of word})}.
119 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of
120 32-bit words. Set the file number to @samp{Y} and the line
121 counter to 0. The next @math{Z * 4} bytes contain the file name,
122 padded with zeros if the count is not a multiple of four. The
123 same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for
124 all but the first occurrence.
127 0x9807YYZZ. @samp{YZ} is the line number. Together with
128 lop_file, it forms the source location for the next 32-bit word.
129 Note that for each non-lopcode 32-bit word, line numbers are
130 assumed incremented by one.
133 0x9808YYZZ. @samp{YZ} is the type number. Data until the next
134 lopcode other than lop_quote forms special data of type @samp{YZ}.
135 @xref{mmo section mapping}.
137 Other types than 80, (or type 80 with a content that does not
138 parse) is stored in sections named <<.MMIX.spec_data.@var{n}>>
139 where @var{n} is the @samp{YZ}-type. The flags for such a
140 sections say not to allocate or load the data. The vma is 0.
141 Contents of multiple occurrences of special data @var{n} is
142 concatenated to the data of the previous lop_spec @var{n}s. The
143 location in data or code at which the lop_spec occurred is lost.
146 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the
147 length of header information in 32-bit words, where the first word
148 tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}.
151 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all
152 content-generating lopcodes in a program. The @samp{Z} field
153 denotes the value of @samp{rG} at the beginning of the program.
154 The following @math{256 - Z} big-endian 64-bit words are loaded
155 into global registers @samp{$G} @dots{} @samp{$255}.
158 0x980b0000. The next-to-last lopcode in a program. Must follow
159 immediately after the lop_post lopcode and its data. After this
160 lopcode follows all symbols in a compressed format
161 (@pxref{Symbol-table}).
164 0x980cYYZZ. The last lopcode in a program. It must follow the
165 lop_stab lopcode and its data. The @samp{YZ} field contains the
166 number of 32-bit words of symbol table information after the
167 preceding lop_stab lopcode.
170 Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and
171 <<lop_fixo>> are not generated by BFD, but are handled. They are
172 generated by <<mmixal>>.
175 This trivial one-label, one-instruction file:
179 can be represented this way in mmo:
181 | 0x98090101 - lop_pre, one 32-bit word with timestamp.
183 | 0x98010002 - lop_loc, text segment, using a 64-bit address.
184 | Note that mmixal does not emit this for the file above.
185 | 0x00000000 - Address, high 32 bits.
186 | 0x00000000 - Address, low 32 bits.
187 | 0x98060002 - lop_file, 2 32-bit words for file-name.
188 | 0x74657374 - "test"
189 | 0x2e730000 - ".s\0\0"
190 | 0x98070001 - lop_line, line 1.
191 | 0x00010203 - TRAP 1,2,3
192 | 0x980a00ff - lop_post, setting $255 to 0.
195 | 0x980b0000 - lop_stab for ":Main" = 0, serial 1.
196 | 0x203a4040 @xref{Symbol-table}.
201 | 0x980c0005 - lop_end; symbol table contained five 32-bit words. */
206 #include "libiberty.h"
207 #include "elf/mmix.h"
208 #include "opcode/mmix.h"
225 #define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1)
226 #define SPEC_DATA_SECTION 80
227 #define LOP_SPEC_SECTION \
228 ((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION)
230 /* Must be a power of two. If you change this to be >= 64k, you need a
231 new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */
232 #define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15)
234 /* An arbitrary number for the maximum length section name size. */
235 #define MAX_SECTION_NAME_SIZE (1024 * 1024)
237 /* A quite arbitrary number for the maximum length section size. */
238 #define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024)
240 #define MMO3_WCHAR 0x80
241 #define MMO3_LEFT 0x40
242 #define MMO3_MIDDLE 0x20
243 #define MMO3_RIGHT 0x10
244 #define MMO3_TYPEBITS 0xf
245 #define MMO3_REGQUAL_BITS 0xf
248 #define MMO3_SYMBITS 0x2f
250 /* Put these everywhere in new code. */
251 #define FATAL_DEBUG \
252 _bfd_abort (__FILE__, __LINE__, \
253 "Internal: Non-debugged code (test-case missing)")
255 #define BAD_CASE(x) \
256 _bfd_abort (__FILE__, __LINE__, \
259 enum mmo_sym_type
{ mmo_reg_sym
, mmo_undef_sym
, mmo_data_sym
, mmo_abs_sym
};
261 /* When scanning the mmo file, a linked list of mmo_symbol
262 structures is built to represent the symbol table (if there is
267 struct mmo_symbol
*next
;
270 enum mmo_sym_type sym_type
;
274 struct mmo_data_list_struct
276 struct mmo_data_list_struct
*next
;
279 bfd_size_type allocated_size
;
283 typedef struct mmo_data_list_struct mmo_data_list_type
;
285 struct mmo_symbol_trie
287 struct mmo_symbol_trie
*left
;
288 struct mmo_symbol_trie
*right
;
289 struct mmo_symbol_trie
*middle
;
293 /* A zero name means there's nothing here. */
294 struct mmo_symbol sym
;
297 /* The mmo tdata information. */
299 struct mmo_data_struct
301 struct mmo_symbol
*symbols
;
302 struct mmo_symbol
*symtail
;
305 /* File representation of time (NULL) when this file was created. */
308 /* When we're reading bytes recursively, check this occasionally.
309 Also holds write errors. */
312 /* Max symbol length that may appear in the lop_stab table. Note that
313 this table might just hold a subset of symbols for not-really large
314 programs, as it can only be 65536 * 4 bytes large. */
315 int max_symbol_length
;
317 /* Here's the symbol we build in lop_stab. */
318 char *lop_stab_symbol
;
320 /* Index into lop_stab_symbol for the next character when parsing the
321 symbol information. */
324 /* When creating arbitrary sections, we need to count section numbers. */
327 /* When writing or reading byte-wise, we need to count the bytes
328 within a 32-bit word. */
331 /* We also need a buffer to hold the bytes we count reading or writing. */
334 /* Whether we've calculated symbol consistency requirement yet. We do this
335 when-needed, which must be at some time after all section
336 contents is known. */
337 bool symbol_consistency_override_calculated
;
339 /* Whether to consistency-check symbol values, in particular "Main". */
340 bool ignore_symbol_consistency
;
343 typedef struct mmo_data_struct tdata_type
;
345 struct mmo_section_data_struct
347 mmo_data_list_type
*head
;
348 mmo_data_list_type
*tail
;
351 #define mmo_section_data(sec) \
352 ((struct mmo_section_data_struct *) (sec)->used_by_bfd)
354 /* These structures are used in bfd_map_over_sections constructs. */
356 /* Used when writing out sections; all but the register contents section
357 which is stored in reg_section. */
358 struct mmo_write_sec_info
360 asection
*reg_section
;
364 /* Used when trying to find a section corresponding to addr. */
365 struct mmo_find_sec_info
371 static bool mmo_bfd_copy_private_bfd_data (bfd
*, bfd
*);
372 static void mmo_write_section_unless_reg_contents (bfd
*, asection
*, void *);
373 static void mmo_find_sec_w_addr (bfd
*, asection
*, void *);
374 static void mmo_find_sec_w_addr_grow (bfd
*, asection
*, void *);
375 static asection
*mmo_make_section (bfd
*, const char *);
376 static void mmo_get_symbol_info (bfd
*, asymbol
*, symbol_info
*);
377 static void mmo_print_symbol (bfd
*, void *, asymbol
*,
378 bfd_print_symbol_type
);
379 static void mmo_init (void);
380 static bool mmo_mkobject (bfd
*);
381 static bool mmo_scan (bfd
*);
382 static asection
*mmo_decide_section (bfd
*, bfd_vma
);
383 static asection
*mmo_get_generic_spec_data_section (bfd
*, int);
384 static asection
*mmo_get_spec_section (bfd
*, int);
385 static INLINE bfd_byte
*mmo_get_loc (asection
*, bfd_vma
, int);
386 static void mmo_xore_64 (asection
*, bfd_vma vma
, bfd_vma value
);
387 static void mmo_xore_32 (asection
*, bfd_vma vma
, unsigned int);
388 static void mmo_xore_16 (asection
*, bfd_vma vma
, unsigned int);
389 static bfd_cleanup
mmo_object_p (bfd
*);
390 static void mmo_map_set_sizes (bfd
*, asection
*, void *);
391 static bool mmo_get_symbols (bfd
*);
392 static bool mmo_create_symbol (bfd
*, const char *, bfd_vma
,
393 enum mmo_sym_type
, unsigned int);
394 static bool mmo_get_section_contents (bfd
*, asection
*, void *,
395 file_ptr
, bfd_size_type
);
396 static long mmo_get_symtab_upper_bound (bfd
*);
397 static long mmo_canonicalize_symtab (bfd
*, asymbol
**);
398 static void mmo_get_symbol_info (bfd
*, asymbol
*, symbol_info
*);
399 static void mmo_print_symbol (bfd
*, void *, asymbol
*,
400 bfd_print_symbol_type
);
401 static bool mmo_set_section_contents (bfd
*, sec_ptr
, const void *,
402 file_ptr
, bfd_size_type
);
403 static int mmo_sizeof_headers (bfd
*, struct bfd_link_info
*);
404 static bool mmo_internal_write_header (bfd
*);
405 static bool mmo_internal_write_post (bfd
*, int, asection
*);
406 static bool mmo_internal_add_3_sym (bfd
*, struct mmo_symbol_trie
*,
407 const struct mmo_symbol
*);
408 static unsigned int mmo_internal_3_length (bfd
*, struct mmo_symbol_trie
*);
409 static void mmo_internal_3_dump (bfd
*, struct mmo_symbol_trie
*);
410 static void mmo_beb128_out (bfd
*, int, int);
411 static bool mmo_internal_write_section (bfd
*, asection
*);
412 static void mmo_write_tetra (bfd
*, unsigned int);
413 static void mmo_write_tetra_raw (bfd
*, unsigned int);
414 static void mmo_write_octa (bfd
*, bfd_vma
);
415 static void mmo_write_octa_raw (bfd
*, bfd_vma
);
416 static bool mmo_write_chunk (bfd
*, const bfd_byte
*, unsigned int);
417 static bool mmo_flush_chunk (bfd
*);
418 static bool mmo_write_loc_chunk (bfd
*, bfd_vma
, const bfd_byte
*,
419 unsigned int, bfd_vma
*);
420 static bool mmo_write_chunk_list (bfd
*, mmo_data_list_type
*);
421 static bool mmo_write_loc_chunk_list (bfd
*, mmo_data_list_type
*);
422 static bool mmo_write_symbols_and_terminator (bfd
*);
423 static flagword
mmo_sec_flags_from_bfd_flags (flagword
);
424 static flagword
bfd_sec_flags_from_mmo_flags (flagword
);
425 static bfd_byte
mmo_get_byte (bfd
*);
426 static void mmo_write_byte (bfd
*, bfd_byte
);
427 static bool mmo_new_section_hook (bfd
*, asection
*);
428 static int mmo_sort_mmo_symbols (const void *, const void *);
429 static bool mmo_write_object_contents (bfd
*);
430 static bool mmo_write_section_description (bfd
*, asection
*);
431 static bool mmo_has_leading_or_trailing_zero_tetra_p (bfd
*, asection
*);
434 valid_mmo_symbol_character_set
[] =
436 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
437 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
438 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
439 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
440 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
441 ':', '_', 126, 127, 128, 129,
442 130, 131, 132, 133, 134, 135, 136, 137, 138, 139,
443 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
444 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
445 160, 161, 162, 163, 164, 165, 166, 167, 168, 169,
446 170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
447 180, 181, 182, 183, 184, 185, 186, 187, 188, 189,
448 190, 191, 192, 193, 194, 195, 196, 197, 198, 199,
449 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
450 210, 211, 212, 213, 214, 215, 216, 217, 218, 219,
451 220, 221, 222, 223, 224, 225, 226, 227, 228, 229,
452 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
453 240, 241, 242, 243, 244, 245, 246, 247, 248, 249,
454 250, 251, 252, 253, 254, 255,
459 /* Get section SECNAME or create one if it doesn't exist. When creating
460 one, new memory for the name is allocated. */
463 mmo_make_section (bfd
*abfd
, const char *secname
)
465 asection
*sec
= bfd_get_section_by_name (abfd
, secname
);
469 char *newsecname
= strdup (secname
);
471 if (newsecname
== NULL
)
474 /* xgettext:c-format */
475 (_("%pB: no core to allocate section name %s"),
477 bfd_set_error (bfd_error_system_call
);
480 sec
= bfd_make_section (abfd
, newsecname
);
486 /* Nothing to do, but keep as a placeholder if we need it.
487 Note that state that might differ between bfd:s must not be initialized
488 here, nor must it be static. Add it to tdata information instead. */
493 static bool inited
= false;
500 /* Check whether an existing file is an mmo file. */
503 mmo_object_p (bfd
*abfd
)
510 if (bfd_stat (abfd
, &statbuf
) < 0
511 || bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0
512 || bfd_bread (b
, 4, abfd
) != 4)
515 /* All mmo files are a multiple of four bytes long.
516 Only recognize version one. */
517 if ((statbuf
.st_size
% 4) != 0
518 || b
[0] != LOP
|| b
[1] != LOP_PRE
|| b
[2] != 1)
521 /* Get the last 32-bit word. */
522 if (bfd_seek (abfd
, (file_ptr
) statbuf
.st_size
- 4, SEEK_SET
) != 0
523 || bfd_bread (b
, 4, abfd
) != 4)
526 /* Check if the file ends in a lop_end lopcode. */
527 if (b
[0] != LOP
|| b
[1] != LOP_END
|| ! mmo_mkobject (abfd
))
530 /* Compute an upper bound on the max symbol length. Not really
531 important as all of the symbol information can only be 256k. */
532 abfd
->tdata
.mmo_data
->max_symbol_length
= (b
[2] * 256 + b
[3]) * 4;
533 abfd
->tdata
.mmo_data
->lop_stab_symbol
534 = bfd_malloc (abfd
->tdata
.mmo_data
->max_symbol_length
+ 1);
536 if (abfd
->tdata
.mmo_data
->lop_stab_symbol
== NULL
)
539 /* xgettext:c-format */
540 (_("%pB: no core to allocate a symbol %d bytes long"),
541 abfd
, abfd
->tdata
.mmo_data
->max_symbol_length
);
545 /* Read in everything. */
546 if (! mmo_scan (abfd
))
547 goto bad_format_free
;
549 if (abfd
->symcount
> 0)
550 abfd
->flags
|= HAS_SYMS
;
552 /* You'll have to tweak this if you want to use this format for other
553 arches (not recommended due to its small-size limitations). Look at
554 the ELF format for how to make it target-generic. */
555 if (! bfd_default_set_arch_mach (abfd
, bfd_arch_mmix
, 0))
556 goto bad_format_free
;
558 return _bfd_no_cleanup
;
561 free (abfd
->tdata
.mmo_data
->lop_stab_symbol
);
563 bfd_set_error (bfd_error_wrong_format
);
568 /* Set up the mmo tdata information. */
571 mmo_mkobject (bfd
*abfd
)
575 if (abfd
->tdata
.mmo_data
== NULL
)
579 /* All fields are zero-initialized, so we don't have to explicitly
581 tdata_type
*tdata
= (tdata_type
*) bfd_zalloc (abfd
, sizeof (tdata_type
));
585 created
= time (NULL
);
586 bfd_put_32 (abfd
, created
, tdata
->created
);
588 abfd
->tdata
.mmo_data
= tdata
;
595 mmo_section_has_contents (bfd
*abfd ATTRIBUTE_UNUSED
, asection
*sec
, void *p ATTRIBUTE_UNUSED
)
597 /* The point is to match what --extract-symbols does (well, negated). */
598 return bfd_section_size (sec
) != 0;
601 /* Find out whether we should omit symbol consistency checks for this
602 bfd and cache the value.
604 This function must only be called when all section contents is
605 known. However, calculating symbol consistency at the time the
606 private BFD data is initialized is too late for some uses. */
609 mmo_ignore_symbol_consistency (bfd
*abfd
)
611 if (!abfd
->tdata
.mmo_data
->symbol_consistency_override_calculated
)
613 abfd
->tdata
.mmo_data
->ignore_symbol_consistency
=
614 bfd_sections_find_if (abfd
, mmo_section_has_contents
, NULL
) == NULL
;
616 abfd
->tdata
.mmo_data
->symbol_consistency_override_calculated
= true;
619 return abfd
->tdata
.mmo_data
->ignore_symbol_consistency
;
623 mmo_bfd_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
625 if (bfd_get_flavour (ibfd
) != bfd_target_mmo_flavour
626 || bfd_get_flavour (obfd
) != bfd_target_mmo_flavour
)
629 /* Copy the time the copied-from file was created. If people want the
630 time the file was last *modified*, they have that in the normal file
632 memcpy (obfd
->tdata
.mmo_data
->created
, ibfd
->tdata
.mmo_data
->created
,
633 sizeof (obfd
->tdata
.mmo_data
->created
));
637 /* Helper functions for mmo_decide_section, used through
638 bfd_map_over_sections. */
641 mmo_find_sec_w_addr (bfd
*abfd ATTRIBUTE_UNUSED
, asection
*sec
, void *p
)
643 struct mmo_find_sec_info
*infop
= (struct mmo_find_sec_info
*) p
;
644 bfd_vma vma
= bfd_section_vma (sec
);
646 /* Ignore sections that aren't loaded. */
647 if ((bfd_section_flags (sec
) & (SEC_LOAD
| SEC_ALLOC
))
648 != (SEC_LOAD
| SEC_ALLOC
))
651 if (infop
->addr
>= vma
&& infop
->addr
< vma
+ sec
->size
)
656 mmo_find_sec_w_addr_grow (bfd
*abfd ATTRIBUTE_UNUSED
, asection
*sec
, void *p
)
658 struct mmo_find_sec_info
*infop
= (struct mmo_find_sec_info
*) p
;
659 bfd_vma vma
= bfd_section_vma (sec
);
661 /* Ignore sections that aren't loaded. */
662 if ((bfd_section_flags (sec
) & (SEC_LOAD
| SEC_ALLOC
))
663 != (SEC_LOAD
| SEC_ALLOC
))
666 if (infop
->addr
>= vma
&& infop
->addr
< vma
+ MAX_ARTIFICIAL_SECTION_SIZE
)
670 /* Find a section that corresponds to a VMA. Automatically create .text
671 or .data and set current section to it, depending on what vma. If we
672 can't deduce a section, make one up as ".MMIX.sec.N", where N is an
673 increasing number. */
676 mmo_decide_section (bfd
*abfd
, bfd_vma vma
)
678 asection
*sec
= NULL
;
679 char sec_name
[sizeof (".MMIX.sec.") + 20];
680 struct mmo_find_sec_info info
;
685 /* First see if there's a section that would match exactly. */
686 bfd_map_over_sections (abfd
, mmo_find_sec_w_addr
, &info
);
688 if (info
.sec
!= NULL
)
691 /* If there's no such section, try and expand one of the existing ones,
692 up to a limit. Make sure we have .text and .data before we try that;
693 create them corresponding to expected addresses and set flags to make
694 them match the "loaded and with contents" expectation. */
695 if ((vma
>> 56) == 0)
697 sec
= bfd_make_section_old_way (abfd
, MMO_TEXT_SECTION_NAME
);
702 if (!sec
->user_set_vma
&& !bfd_set_section_vma (sec
, vma
))
705 if (!bfd_set_section_flags (sec
, (bfd_section_flags (sec
)
706 | SEC_CODE
| SEC_LOAD
| SEC_ALLOC
)))
709 else if ((vma
>> 56) == 0x20)
711 sec
= bfd_make_section_old_way (abfd
, MMO_DATA_SECTION_NAME
);
716 if (!sec
->user_set_vma
&& !bfd_set_section_vma (sec
, vma
))
719 if (!bfd_set_section_flags (sec
, (bfd_section_flags (sec
)
720 | SEC_LOAD
| SEC_ALLOC
)))
724 bfd_map_over_sections (abfd
, mmo_find_sec_w_addr_grow
, &info
);
726 if (info
.sec
!= NULL
)
729 /* If there's still no suitable section, make a new one. */
730 sprintf (sec_name
, ".MMIX.sec.%d", abfd
->tdata
.mmo_data
->sec_no
++);
731 sec
= mmo_make_section (abfd
, sec_name
);
733 if (!sec
->user_set_vma
&& !bfd_set_section_vma (sec
, vma
))
736 if (!bfd_set_section_flags (sec
, (bfd_section_flags (sec
)
737 | SEC_LOAD
| SEC_ALLOC
)))
742 /* Xor in a 64-bit value VALUE at VMA. */
745 mmo_xore_64 (asection
*sec
, bfd_vma vma
, bfd_vma value
)
747 bfd_byte
*loc
= mmo_get_loc (sec
, vma
, 8);
748 bfd_vma prev
= bfd_get_64 (sec
->owner
, loc
);
751 bfd_put_64 (sec
->owner
, value
, loc
);
754 /* Xor in a 32-bit value VALUE at VMA. */
757 mmo_xore_32 (asection
*sec
, bfd_vma vma
, unsigned int value
)
759 bfd_byte
*loc
= mmo_get_loc (sec
, vma
, 4);
760 unsigned int prev
= bfd_get_32 (sec
->owner
, loc
);
763 bfd_put_32 (sec
->owner
, value
, loc
);
766 /* Xor in a 16-bit value VALUE at VMA. */
769 mmo_xore_16 (asection
*sec
, bfd_vma vma
, unsigned int value
)
771 bfd_byte
*loc
= mmo_get_loc (sec
, vma
, 2);
772 unsigned int prev
= bfd_get_16 (sec
->owner
, loc
);
775 bfd_put_16 (sec
->owner
, value
, loc
);
778 /* Write a 32-bit word to output file, no lop_quote generated. */
781 mmo_write_tetra_raw (bfd
*abfd
, unsigned int value
)
785 bfd_put_32 (abfd
, value
, buf
);
787 if (bfd_bwrite (buf
, 4, abfd
) != 4)
788 abfd
->tdata
.mmo_data
->have_error
= true;
791 /* Write a 32-bit word to output file; lop_quote if necessary. */
794 mmo_write_tetra (bfd
*abfd
, unsigned int value
)
796 if (((value
>> 24) & 0xff) == LOP
)
797 mmo_write_tetra_raw (abfd
, LOP_QUOTE_NEXT
);
799 mmo_write_tetra_raw (abfd
, value
);
802 /* Write a 64-bit word to output file, perhaps with lop_quoting. */
805 mmo_write_octa (bfd
*abfd
, bfd_vma value
)
807 mmo_write_tetra (abfd
, (unsigned int) (value
>> 32));
808 mmo_write_tetra (abfd
, (unsigned int) value
);
811 /* Write a 64-bit word to output file, without lop_quoting. */
814 mmo_write_octa_raw (bfd
*abfd
, bfd_vma value
)
816 mmo_write_tetra_raw (abfd
, (unsigned int) (value
>> 32));
817 mmo_write_tetra_raw (abfd
, (unsigned int) value
);
820 /* Write quoted contents. Intended to be called multiple times in
821 sequence, followed by a call to mmo_flush_chunk. */
824 mmo_write_chunk (bfd
*abfd
, const bfd_byte
*loc
, unsigned int len
)
827 struct mmo_data_struct
*mmop
= abfd
->tdata
.mmo_data
;
829 /* Fill up a tetra from bytes remaining from a previous chunk. */
830 if (mmop
->byte_no
!= 0)
832 while (mmop
->byte_no
< 4 && len
!= 0)
834 mmop
->buf
[mmop
->byte_no
++] = *loc
++;
838 if (mmop
->byte_no
== 4)
840 mmo_write_tetra (abfd
, bfd_get_32 (abfd
, mmop
->buf
));
848 mmo_write_tetra_raw (abfd
, LOP_QUOTE_NEXT
);
851 && ! mmop
->have_error
852 && 4 == bfd_bwrite (loc
, 4, abfd
));
860 /* We must have flushed a previous remainder if we get one from
862 BFD_ASSERT (mmop
->byte_no
== 0);
863 memcpy (mmop
->buf
, loc
, len
);
868 mmop
->have_error
= true;
872 /* Flush remaining bytes, from a previous mmo_write_chunk, zero-padded to
876 mmo_flush_chunk (bfd
*abfd
)
878 if (abfd
->tdata
.mmo_data
->byte_no
!= 0)
880 memset (abfd
->tdata
.mmo_data
->buf
+ abfd
->tdata
.mmo_data
->byte_no
,
881 0, 4 - abfd
->tdata
.mmo_data
->byte_no
);
882 mmo_write_tetra (abfd
,
883 bfd_get_32 (abfd
, abfd
->tdata
.mmo_data
->buf
));
884 abfd
->tdata
.mmo_data
->byte_no
= 0;
887 return ! abfd
->tdata
.mmo_data
->have_error
;
890 /* Same, but from a list. */
893 mmo_write_chunk_list (bfd
*abfd
, mmo_data_list_type
*datap
)
895 for (; datap
!= NULL
; datap
= datap
->next
)
896 if (! mmo_write_chunk (abfd
, datap
->data
, datap
->size
))
899 return mmo_flush_chunk (abfd
);
902 /* Write a lop_loc and some contents. A caller needs to call
903 mmo_flush_chunk after calling this function. The location is only
904 output if different than *LAST_VMAP, which is updated after this call. */
907 mmo_write_loc_chunk (bfd
*abfd
, bfd_vma vma
, const bfd_byte
*loc
,
908 unsigned int len
, bfd_vma
*last_vmap
)
910 /* Find an initial and trailing section of zero (aligned) tetras; we don't
911 need to write out zeros. FIXME: When we do this, we should emit
912 section size and address specifiers, else objcopy can't always perform
913 an identity translation. Only do this if we *don't* have left-over
914 data from a previous write (and will not add any) or else the vma of
915 this chunk is *not* the next address, because then data isn't
916 tetrabyte-aligned and we're concatenating to that left-over data. */
919 && (abfd
->tdata
.mmo_data
->byte_no
== 0 || vma
!= *last_vmap
))
921 while (len
> 4 && bfd_get_32 (abfd
, loc
) == 0)
929 while (len
> 4 && bfd_get_32 (abfd
, loc
+ len
- 4) == 0)
933 /* Only write out the location if it's different than the one the caller
934 (supposedly) previously handled, accounting for omitted leading zeros. */
935 if (vma
!= *last_vmap
)
937 /* We might be in the middle of a sequence. */
938 mmo_flush_chunk (abfd
);
940 /* This should not happen during normal usage, but can presumably
941 happen with an erroneous linker-script, so handle gracefully.
942 Avoid Knuth-specific terms in the message, such as "tetrabyte".
943 Note that this function will get non-4-multiple lengths and
944 unaligned vmas but those come in tuples (mostly pairs) and are
945 continuous (i.e. the if-condition above false) and they are
946 group-wise aligned. */
950 /* xgettext:c-format */
951 (_("%pB: attempt to emit contents at non-multiple-of-4"
952 " address %#" PRIx64
""),
953 abfd
, (uint64_t) vma
);
954 bfd_set_error (bfd_error_bad_value
);
958 /* We always write the location as 64 bits; no use saving bytes
960 mmo_write_tetra_raw (abfd
, (LOP
<< 24) | (LOP_LOC
<< 16) | 2);
961 mmo_write_octa_raw (abfd
, vma
);
964 /* Update to reflect end of this chunk, with trailing zeros omitted. */
965 *last_vmap
= vma
+ len
;
967 return (! abfd
->tdata
.mmo_data
->have_error
968 && mmo_write_chunk (abfd
, loc
, len
));
971 /* Same, but from a list. */
974 mmo_write_loc_chunk_list (bfd
*abfd
, mmo_data_list_type
*datap
)
976 /* Get an address different than the address of the first chunk. */
977 bfd_vma last_vma
= datap
? datap
->where
- 1 : 0;
979 for (; datap
!= NULL
; datap
= datap
->next
)
980 if (! mmo_write_loc_chunk (abfd
, datap
->where
, datap
->data
, datap
->size
,
984 return mmo_flush_chunk (abfd
);
987 /* Make a .MMIX.spec_data.N section. */
990 mmo_get_generic_spec_data_section (bfd
*abfd
, int spec_data_number
)
993 char secname
[sizeof (MMIX_OTHER_SPEC_SECTION_PREFIX
) + 20]
994 = MMIX_OTHER_SPEC_SECTION_PREFIX
;
996 sprintf (secname
+ strlen (MMIX_OTHER_SPEC_SECTION_PREFIX
),
997 "%d", spec_data_number
);
999 sec
= mmo_make_section (abfd
, secname
);
1004 /* Make a special section for SPEC_DATA_NUMBER. If it is the one we use
1005 ourselves, parse some of its data to get at the section name. */
1008 mmo_get_spec_section (bfd
*abfd
, int spec_data_number
)
1013 unsigned int secname_length
;
1015 bfd_vma section_length
;
1016 bfd_vma section_vma
;
1017 mmo_data_list_type
*loc
;
1021 /* If this isn't the "special" special data, then make a placeholder
1023 if (spec_data_number
!= SPEC_DATA_SECTION
)
1024 return mmo_get_generic_spec_data_section (abfd
, spec_data_number
);
1026 /* Seek back to this position if there was a format error. */
1027 orig_pos
= bfd_tell (abfd
);
1029 /* Read the length (in 32-bit words). */
1030 if (bfd_bread (buf
, 4, abfd
) != 4)
1035 if (buf
[1] != LOP_QUOTE
)
1038 if (bfd_bread (buf
, 4, abfd
) != 4)
1042 /* We don't care to keep the name length accurate. It's
1044 secname_length
= bfd_get_32 (abfd
, buf
) * 4;
1046 /* Check section name length for sanity. */
1047 if (secname_length
> MAX_SECTION_NAME_SIZE
)
1050 /* This should be free'd regardless if a section is created. */
1051 secname
= bfd_malloc (secname_length
+ 1);
1052 secname
[secname_length
] = 0;
1054 for (i
= 0; i
< secname_length
/ 4; i
++)
1056 if (bfd_bread (secname
+ i
* 4, 4, abfd
) != 4)
1057 goto format_error_free
;
1059 if (secname
[i
* 4] == (char) LOP
)
1061 /* A bit of overkill, but we handle char 0x98 in a section name,
1062 and recognize misparsing. */
1063 if (secname
[i
* 4 + 1] != LOP_QUOTE
1064 || bfd_bread (secname
+ i
* 4, 4, abfd
) != 4)
1065 /* Whoops. We thought this was a name, and now we found a
1066 non-lop_quote lopcode before we parsed the whole length of
1067 the name. Signal end-of-file in the same manner. */
1068 goto format_error_free
;
1072 /* Get the section flags. */
1073 if (bfd_bread (buf
, 4, abfd
) != 4
1075 && (buf
[1] != LOP_QUOTE
|| bfd_bread (buf
, 4, abfd
) != 4)))
1076 goto format_error_free
;
1078 flags
= bfd_get_32 (abfd
, buf
);
1080 /* Get the section length. */
1081 if (bfd_bread (buf
, 4, abfd
) != 4
1083 && (buf
[1] != LOP_QUOTE
|| bfd_bread (buf
, 4, abfd
) != 4)))
1084 goto format_error_free
;
1086 section_length
= (bfd_vma
) bfd_get_32 (abfd
, buf
) << 32;
1088 /* That's the first, high-part. Now get the low part. */
1090 if (bfd_bread (buf
, 4, abfd
) != 4
1092 && (buf
[1] != LOP_QUOTE
|| bfd_bread (buf
, 4, abfd
) != 4)))
1093 goto format_error_free
;
1095 section_length
|= (bfd_vma
) bfd_get_32 (abfd
, buf
);
1097 /* Check the section length for sanity. */
1098 if (section_length
> MAX_ARTIFICIAL_SECTION_SIZE
)
1099 goto format_error_free
;
1101 /* Get the section VMA. */
1102 if (bfd_bread (buf
, 4, abfd
) != 4
1104 && (buf
[1] != LOP_QUOTE
|| bfd_bread (buf
, 4, abfd
) != 4)))
1105 goto format_error_free
;
1107 section_vma
= (bfd_vma
) bfd_get_32 (abfd
, buf
) << 32;
1109 /* That's the first, high-part. Now get the low part. */
1110 if (bfd_bread (buf
, 4, abfd
) != 4
1112 && (buf
[1] != LOP_QUOTE
|| bfd_bread (buf
, 4, abfd
) != 4)))
1113 goto format_error_free
;
1115 section_vma
|= (bfd_vma
) bfd_get_32 (abfd
, buf
);
1117 sec
= mmo_make_section (abfd
, secname
);
1122 /* We allocate a buffer here for the advertised size, with head room for
1123 tetrabyte alignment. */
1124 loc
= bfd_zmalloc (section_length
+ 3
1125 + sizeof (struct mmo_data_list_struct
));
1129 /* Use a TETRA-rounded size for the allocated buffer; we set the
1130 "visible" section size below. */
1131 loc
->size
= (section_length
+ 3) & ~3;
1133 /* Add in the section flags we found to those bfd entered during this
1134 process and set the contents. */
1135 if (!bfd_set_section_flags (sec
,
1136 (bfd_sec_flags_from_mmo_flags (flags
)
1137 | bfd_section_flags (sec
)
1138 | (section_length
!= 0 ? SEC_HAS_CONTENTS
: 0)))
1139 || !bfd_set_section_size (sec
, sec
->size
+ section_length
)
1140 /* Set VMA only for the first occurrence. */
1141 || (!sec
->user_set_vma
&& !bfd_set_section_vma (sec
, section_vma
)))
1143 /* If we get an error for any of the calls above, signal more than
1144 just a format error for the spec section. */
1149 if (mmo_section_data (sec
)->tail
!= NULL
)
1150 mmo_section_data (sec
)->tail
->next
= loc
;
1152 mmo_section_data (sec
)->head
= loc
;
1153 mmo_section_data (sec
)->tail
= loc
;
1154 loc
->where
= section_vma
;
1161 if (bfd_seek (abfd
, orig_pos
, SEEK_SET
) != 0)
1164 return mmo_get_generic_spec_data_section (abfd
, spec_data_number
);
1167 /* Read a byte, but read from file in multiples of 32-bit words. */
1170 mmo_get_byte (bfd
*abfd
)
1174 if (abfd
->tdata
.mmo_data
->byte_no
== 0)
1176 if (! abfd
->tdata
.mmo_data
->have_error
1177 && bfd_bread (abfd
->tdata
.mmo_data
->buf
, 4, abfd
) != 4)
1179 abfd
->tdata
.mmo_data
->have_error
= true;
1181 /* A value somewhat safe against tripping on some inconsistency
1182 when mopping up after this error. */
1187 retval
= abfd
->tdata
.mmo_data
->buf
[abfd
->tdata
.mmo_data
->byte_no
];
1188 abfd
->tdata
.mmo_data
->byte_no
= (abfd
->tdata
.mmo_data
->byte_no
+ 1) % 4;
1193 /* Write a byte, in multiples of 32-bit words. */
1196 mmo_write_byte (bfd
*abfd
, bfd_byte value
)
1198 abfd
->tdata
.mmo_data
->buf
[(abfd
->tdata
.mmo_data
->byte_no
++ % 4)] = value
;
1199 if ((abfd
->tdata
.mmo_data
->byte_no
% 4) == 0)
1201 if (! abfd
->tdata
.mmo_data
->have_error
1202 && bfd_bwrite (abfd
->tdata
.mmo_data
->buf
, 4, abfd
) != 4)
1203 abfd
->tdata
.mmo_data
->have_error
= true;
1207 /* Create a symbol. */
1210 mmo_create_symbol (bfd
*abfd
, const char *symname
, bfd_vma addr
, enum
1211 mmo_sym_type sym_type
, unsigned int serno
)
1213 struct mmo_symbol
*n
;
1215 n
= (struct mmo_symbol
*) bfd_alloc (abfd
, sizeof (struct mmo_symbol
));
1219 n
->name
= bfd_alloc (abfd
, strlen (symname
) + 1);
1220 if (n
->name
== NULL
)
1223 strcpy (n
->name
, symname
);
1226 n
->sym_type
= sym_type
;
1229 if (abfd
->tdata
.mmo_data
->symbols
== NULL
)
1230 abfd
->tdata
.mmo_data
->symbols
= n
;
1232 abfd
->tdata
.mmo_data
->symtail
->next
= n
;
1233 abfd
->tdata
.mmo_data
->symtail
= n
;
1238 /* Check that :Main equals the last octa of the .MMIX.reg_contents
1239 section, as it's the one place we're sure to pass when reading a mmo
1240 object. For written objects, we do it while setting the symbol
1242 if (strcmp (symname
, MMIX_START_SYMBOL_NAME
) == 0
1243 && bfd_get_start_address (abfd
) != addr
1244 && !mmo_ignore_symbol_consistency (abfd
))
1247 (_("%pB: invalid mmo file: initialization value for $255"
1248 " is not `Main'\n"),
1250 bfd_set_error (bfd_error_bad_value
);
1257 /* Read in symbols. */
1260 mmo_get_symbols (bfd
*abfd
)
1264 Symbol-table, mmo section mapping, File layout, mmo
1268 From mmixal.w (or really, the generated mmixal.tex) in the
1269 MMIXware package which also contains the @command{mmix} simulator:
1270 ``Symbols are stored and retrieved by means of a @samp{ternary
1271 search trie}, following ideas of Bentley and Sedgewick. (See
1272 ACM--SIAM Symp.@: on Discrete Algorithms @samp{8} (1997), 360--369;
1273 R.@:Sedgewick, @samp{Algorithms in C} (Reading, Mass.@:
1274 Addison--Wesley, 1998), @samp{15.4}.) Each trie node stores a
1275 character, and there are branches to subtries for the cases where
1276 a given character is less than, equal to, or greater than the
1277 character in the trie. There also is a pointer to a symbol table
1278 entry if a symbol ends at the current node.''
1280 So it's a tree encoded as a stream of bytes. The stream of bytes
1281 acts on a single virtual global symbol, adding and removing
1282 characters and signalling complete symbol points. Here, we read
1283 the stream and create symbols at the completion points.
1285 First, there's a control byte <<m>>. If any of the listed bits
1286 in <<m>> is nonzero, we execute what stands at the right, in
1290 | 0x40 - Traverse left trie.
1291 | (Read a new command byte and recurse.)
1294 | 0x2f - Read the next byte as a character and store it in the
1295 | current character position; increment character position.
1296 | Test the bits of <<m>>:
1299 | 0x80 - The character is 16-bit (so read another byte,
1300 | merge into current character.
1303 | 0xf - We have a complete symbol; parse the type, value
1304 | and serial number and do what should be done
1305 | with a symbol. The type and length information
1306 | is in j = (m & 0xf).
1308 | (MMO3_REGQUAL_BITS)
1309 | j == 0xf: A register variable. The following
1310 | byte tells which register.
1311 | j <= 8: An absolute symbol. Read j bytes as the
1312 | big-endian number the symbol equals.
1313 | A j = 2 with two zero bytes denotes an
1315 | j > 8: As with j <= 8, but add (0x20 << 56)
1316 | to the value in the following j - 8
1319 | Then comes the serial number, as a variant of
1320 | uleb128, but better named ubeb128:
1321 | Read bytes and shift the previous value left 7
1322 | (multiply by 128). Add in the new byte, repeat
1323 | until a byte has bit 7 set. The serial number
1324 | is the computed value minus 128.
1327 | 0x20 - Traverse middle trie. (Read a new command byte
1328 | and recurse.) Decrement character position.
1331 | 0x10 - Traverse right trie. (Read a new command byte and
1334 Let's look again at the <<lop_stab>> for the trivial file
1335 (@pxref{File layout}).
1337 | 0x980b0000 - lop_stab for ":Main" = 0, serial 1.
1344 This forms the trivial trie (note that the path between ``:'' and
1345 ``M'' is redundant):
1356 | 016e "n" is the last character in a full symbol, and
1357 | with a value represented in one byte.
1358 | 00 The value is 0.
1359 | 81 The serial number is 1. */
1361 bfd_byte m
= mmo_get_byte (abfd
);
1363 /* Check first if we have a bad hair day. */
1364 if (abfd
->tdata
.mmo_data
->have_error
)
1368 /* Traverse left trie. */
1369 mmo_get_symbols (abfd
);
1371 if (m
& MMO3_SYMBITS
)
1373 bfd_byte c
= mmo_get_byte (abfd
);
1374 bfd_byte j
= m
& MMO3_TYPEBITS
;
1376 enum mmo_sym_type sym_type
;
1377 unsigned int serno
= 0;
1382 bfd_byte c2
= mmo_get_byte (abfd
);
1384 /* A two-byte character. We can't grok this, but neither can
1385 mmotype, for other cases than the second byte being zero. */
1389 abfd
->tdata
.mmo_data
->lop_stab_symbol
1390 [abfd
->tdata
.mmo_data
->symbol_position
] = 0;
1393 /* xgettext:c-format */
1394 (_("%pB: unsupported wide character sequence"
1395 " 0x%02X 0x%02X after symbol name starting with `%s'\n"),
1396 abfd
, c
, c2
, abfd
->tdata
.mmo_data
->lop_stab_symbol
);
1397 bfd_set_error (bfd_error_bad_value
);
1398 abfd
->tdata
.mmo_data
->have_error
= true;
1405 abfd
->tdata
.mmo_data
->lop_stab_symbol
[abfd
->tdata
.mmo_data
->symbol_position
++] = c
;
1406 abfd
->tdata
.mmo_data
->lop_stab_symbol
[abfd
->tdata
.mmo_data
->symbol_position
] = 0;
1408 if (j
& MMO3_REGQUAL_BITS
)
1410 if (j
== MMO3_REGQUAL_BITS
)
1412 sym_type
= mmo_reg_sym
;
1413 addr
= mmo_get_byte (abfd
);
1419 for (i
= 0; i
< j
; i
++)
1420 addr
= (addr
<< 8) + mmo_get_byte (abfd
);
1422 if (addr
== 0 && j
== MMO3_UNDEF
)
1423 sym_type
= mmo_undef_sym
;
1425 sym_type
= mmo_abs_sym
;
1431 for (i
= MMO3_DATA
; i
< j
; i
++)
1432 addr
= (addr
<< 8) + mmo_get_byte (abfd
);
1434 addr
+= (bfd_vma
) 0x20 << 56;
1435 sym_type
= mmo_data_sym
;
1438 /* Get the serial number. */
1441 k
= mmo_get_byte (abfd
);
1442 serno
= (serno
<< 7) + k
;
1447 /* Got it. Now enter it. Skip a leading ":". */
1448 if (! abfd
->tdata
.mmo_data
->have_error
1449 && ! mmo_create_symbol (abfd
,
1450 abfd
->tdata
.mmo_data
->lop_stab_symbol
1452 addr
, sym_type
, serno
))
1453 abfd
->tdata
.mmo_data
->have_error
= true;
1456 if (m
& MMO3_MIDDLE
)
1457 /* Traverse middle trie. */
1458 mmo_get_symbols (abfd
);
1460 abfd
->tdata
.mmo_data
->symbol_position
--;
1464 /* Traverse right trie. */
1465 mmo_get_symbols (abfd
);
1467 return ! abfd
->tdata
.mmo_data
->have_error
;
1470 /* Get the location of memory area [VMA..VMA + SIZE - 1], which we think
1471 is in section SEC. Adjust and reallocate zero-initialized contents.
1472 If there's new contents, allocate to the next multiple of
1473 MMO_SEC_CONTENTS_CHUNK_SIZE. */
1475 static INLINE bfd_byte
*
1476 mmo_get_loc (asection
*sec
, bfd_vma vma
, int size
)
1478 bfd_size_type allocated_size
;
1479 struct mmo_section_data_struct
*sdatap
= mmo_section_data (sec
);
1480 struct mmo_data_list_struct
*datap
= sdatap
->head
;
1481 struct mmo_data_list_struct
*entry
;
1483 /* First search the list to see if we have the requested chunk in one
1484 piece, or perhaps if we have a suitable chunk with room to fit. */
1485 for (; datap
!= NULL
; datap
= datap
->next
)
1487 if (datap
->where
<= vma
1488 && datap
->where
+ datap
->size
>= vma
+ size
)
1489 return datap
->data
+ vma
- datap
->where
;
1490 else if (datap
->where
<= vma
1491 && datap
->where
+ datap
->allocated_size
>= vma
+ size
1492 /* Only munch on the "allocated size" if it does not
1493 overlap the next chunk. */
1494 && (datap
->next
== NULL
|| datap
->next
->where
>= vma
+ size
))
1496 /* There was room allocated, but the size wasn't set to include
1498 datap
->size
+= (vma
+ size
) - (datap
->where
+ datap
->size
);
1500 /* Update the section size. This happens only if we update the
1501 32-bit-aligned chunk size. Callers that have
1502 non-32-bit-aligned sections should do all allocation and
1503 size-setting by themselves or at least set the section size
1504 after the last allocating call to this function. */
1505 if (vma
+ size
> sec
->vma
+ sec
->size
)
1506 sec
->size
+= (vma
+ size
) - (sec
->vma
+ sec
->size
);
1508 return datap
->data
+ vma
- datap
->where
;
1512 /* Not found; allocate a new block. First check in case we get a
1513 request for a size split up over several blocks; we'll have to return
1514 NULL for those cases, requesting the caller to split up the request.
1515 Requests with an address aligned on MMO_SEC_CONTENTS_CHUNK_SIZE bytes and
1516 for no more than MMO_SEC_CONTENTS_CHUNK_SIZE will always get resolved. */
1518 for (datap
= sdatap
->head
; datap
!= NULL
; datap
= datap
->next
)
1519 if ((datap
->where
<= vma
&& datap
->where
+ datap
->size
> vma
)
1520 || (datap
->where
< vma
+ size
1521 && datap
->where
+ datap
->size
>= vma
+ size
))
1525 = (size
+ MMO_SEC_CONTENTS_CHUNK_SIZE
- 1) & ~(MMO_SEC_CONTENTS_CHUNK_SIZE
- 1);
1526 entry
= (mmo_data_list_type
*)
1527 bfd_zalloc (sec
->owner
, sizeof (mmo_data_list_type
) + allocated_size
);
1532 entry
->allocated_size
= allocated_size
;
1534 datap
= sdatap
->head
;
1536 /* Sort the records by address. Optimize for the common case of adding
1537 a record to the end of the list. */
1538 if (sdatap
->tail
!= NULL
&& entry
->where
>= sdatap
->tail
->where
)
1540 sdatap
->tail
->next
= entry
;
1542 sdatap
->tail
= entry
;
1546 mmo_data_list_type
**look
;
1547 for (look
= &sdatap
->head
;
1548 *look
!= NULL
&& (*look
)->where
< entry
->where
;
1549 look
= &(*look
)->next
)
1551 entry
->next
= *look
;
1553 if (entry
->next
== NULL
)
1555 sdatap
->tail
= entry
;
1557 /* We get here for the first time (at other times too) for this
1558 section. Say we have contents. */
1559 if (!bfd_set_section_flags (sec
, (bfd_section_flags (sec
)
1560 | SEC_HAS_CONTENTS
)))
1565 /* Update the section size. This happens only when we add contents and
1566 re-size as we go. The section size will then be aligned to 32 bits. */
1567 if (vma
+ size
> sec
->vma
+ sec
->size
)
1568 sec
->size
+= (vma
+ size
) - (sec
->vma
+ sec
->size
);
1572 /* Set sizes once we've read in all sections. */
1575 mmo_map_set_sizes (bfd
*abfd ATTRIBUTE_UNUSED
, asection
*sec
,
1576 void *ignored ATTRIBUTE_UNUSED
)
1578 sec
->lma
= sec
->vma
;
1581 /* Read the mmo file and turn it into sections. */
1584 mmo_scan (bfd
*abfd
)
1587 unsigned int lineno
= 1;
1590 asection
*sec
= NULL
;
1591 asection
*non_spec_sec
= NULL
;
1592 bfd_vma non_spec_vma
= 0;
1593 bfd_size_type nbytes_read
= 0;
1594 /* Buffer with room to read a 64-bit value. */
1596 file_ptr stab_loc
= -1;
1597 char *file_names
[256];
1600 memset (file_names
, 0, sizeof (file_names
));
1602 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
1605 while ((nbytes_read
= bfd_bread (buf
, 4, abfd
)) == 4)
1609 unsigned int y
= bfd_get_8 (abfd
, buf
+ 2);
1610 unsigned int z
= bfd_get_8 (abfd
, buf
+ 3);
1612 /* Change back to the original section for lopcodes other
1613 than LOP_QUOTE that comes after a LOP_SPEC. */
1614 if ((buf
[1] != LOP_QUOTE
|| y
!= 0 || z
!= 1)
1615 && non_spec_sec
!= NULL
)
1619 non_spec_sec
= NULL
;
1626 /* xgettext:c-format */
1627 (_("%pB: invalid mmo file: unsupported lopcode `%d'\n"),
1629 bfd_set_error (bfd_error_bad_value
);
1633 /* Quote the next 32-bit word. */
1634 if (y
!= 0 || z
!= 1)
1637 /* xgettext:c-format */
1638 (_("%pB: invalid mmo file: expected YZ = 1"
1639 " got YZ = %d for lop_quote\n"),
1641 bfd_set_error (bfd_error_bad_value
);
1644 if (bfd_bread (buf
, 4, abfd
) != 4)
1649 sec
= bfd_make_section_old_way (abfd
, MMO_TEXT_SECTION_NAME
);
1650 mmo_xore_32 (sec
, vma
, bfd_get_32 (abfd
, buf
));
1656 /* Set vma (and section). */
1657 vma
= (bfd_vma
) y
<< 56;
1660 /* Get a 32-bit value. */
1661 if (bfd_bread (buf
, 4, abfd
) != 4)
1664 vma
+= bfd_get_32 (abfd
, buf
);
1668 /* Get a 64-bit value. */
1669 if (bfd_bread (buf
, 8, abfd
) != 8)
1672 vma
+= bfd_get_64 (abfd
, buf
);
1677 /* xgettext:c-format */
1678 (_("%pB: invalid mmo file: expected z = 1 or z = 2,"
1679 " got z = %d for lop_loc\n"),
1681 bfd_set_error (bfd_error_bad_value
);
1685 /* When we decide which section the data goes into, we might
1686 create the section. If that happens, make sure the VMA at
1687 creation time is tetra-aligned. */
1688 sec
= mmo_decide_section (abfd
, vma
& ~3);
1694 /* Move forward within the same section. */
1697 sec
= mmo_decide_section (abfd
, vma
);
1703 /* A fixup: Store the current vma somewhere. Position using
1704 same format as LOP_LOC. */
1706 bfd_vma p
= (bfd_vma
) y
<< 56;
1711 /* Get a 32-bit value. */
1712 if (bfd_bread (buf
, 4, abfd
) != 4)
1715 p
+= bfd_get_32 (abfd
, buf
);
1719 /* Get a 64-bit value. */
1720 if (bfd_bread (buf
, 8, abfd
) != 8)
1723 p
+= bfd_get_64 (abfd
, buf
);
1728 /* xgettext:c-format */
1729 (_("%pB: invalid mmo file: expected z = 1 or z = 2,"
1730 " got z = %d for lop_fixo\n"),
1732 bfd_set_error (bfd_error_bad_value
);
1736 /* The section where we store this address might be a
1737 different one than the current section. */
1738 fixosec
= mmo_decide_section (abfd
, p
);
1739 if (fixosec
== NULL
)
1741 mmo_xore_64 (fixosec
, p
, vma
);
1746 /* A fixup: Store YZ of this lopcode into YZ at vma - 4 * yz. */
1748 unsigned int yz
= (y
* 256 + z
);
1749 bfd_vma p
= vma
+ 2 - 4 * yz
;
1750 asection
*fixrsec
= mmo_decide_section (abfd
, p
);
1751 if (fixrsec
== NULL
)
1753 mmo_xore_16 (fixrsec
, p
, yz
);
1758 /* A fixup, similar to lop_fixr, but taking larger numbers
1759 and can change branches into the opposite direction
1769 /* xgettext:c-format */
1770 (_("%pB: invalid mmo file: expected y = 0,"
1771 " got y = %d for lop_fixrx\n"),
1773 bfd_set_error (bfd_error_bad_value
);
1777 if (z
!= 16 && z
!= 24)
1780 /* xgettext:c-format */
1781 (_("%pB: invalid mmo file: expected z = 16 or z = 24,"
1782 " got z = %d for lop_fixrx\n"),
1784 bfd_set_error (bfd_error_bad_value
);
1788 /* Get the next 32-bit value. */
1789 if (bfd_bread (buf
, 4, abfd
) != 4)
1792 delta
= bfd_get_32 (abfd
, buf
);
1794 /* Do an, ehm, involved calculation for the location of
1795 the fixup. See mmixal documentation for a verbose
1796 explanation. We follow it verbosely here for the
1799 p
= vma
- 4 * delta
;
1800 else if (buf
[0] == 1)
1801 p
= vma
- 4 * ((delta
& 0xffffff) - (1 << z
));
1805 /* xgettext:c-format */
1806 (_("%pB: invalid mmo file: leading byte of operand word"
1807 " must be 0 or 1, got %d for lop_fixrx\n"),
1809 bfd_set_error (bfd_error_bad_value
);
1813 fixrsec
= mmo_decide_section (abfd
, vma
);
1814 if (fixrsec
== NULL
)
1816 mmo_xore_32 (fixrsec
, p
, delta
);
1821 /* Set current file and perhaps the file name. Reset line
1825 char *fname
= bfd_malloc (z
* 4 + 1);
1830 /* xgettext:c-format */
1831 (_("%pB: cannot allocate file name for file number %d,"
1833 abfd
, y
, z
* 4 + 1);
1834 bfd_set_error (bfd_error_system_call
);
1840 for (i
= 0; i
< z
; i
++)
1842 if (bfd_bread (fname
+ i
* 4, 4, abfd
) != 4)
1849 if (file_names
[y
] != NULL
)
1852 /* xgettext:c-format */
1853 (_("%pB: invalid mmo file: file number %d `%s',"
1854 " was already entered as `%s'\n"),
1855 abfd
, y
, fname
, file_names
[y
]);
1856 bfd_set_error (bfd_error_bad_value
);
1860 file_names
[y
] = fname
;
1863 if (file_names
[y
] == NULL
)
1866 /* xgettext:c-format */
1867 (_("%pB: invalid mmo file: file name for number %d"
1868 " was not specified before use\n"),
1870 bfd_set_error (bfd_error_bad_value
);
1878 /* Set line number. */
1879 lineno
= y
* 256 + z
;
1880 /* FIXME: Create a sequence of mmo-specific line number
1881 entries for each section, then translate into canonical
1886 /* Special data follows until the next non-lop_quote
1890 sec
= mmo_get_spec_section (abfd
, y
* 256 + z
);
1899 /* We ignore header information, except we read in the
1900 creation time from the first 32-bit word with the time
1901 in seconds since era. */
1903 && bfd_bread (abfd
->tdata
.mmo_data
->created
, 4,
1907 for (i
= 1; i
< z
; i
++)
1908 if (bfd_bread (buf
, 4, abfd
) != 4)
1914 /* This tells of the contents of registers $Z..$255 at
1915 startup. We make a section out of it, with VMA = Z * 8,
1916 but only if Z != 255 or the contents is non-zero. */
1921 bfd_vma startaddr_octa
;
1923 /* Read first octaword outside loop to simplify logic when
1924 excluding the Z == 255, octa == 0 case. */
1925 if (bfd_bread (buf
, 8, abfd
) != 8)
1928 first_octa
= bfd_get_64 (abfd
, buf
);
1930 /* Don't emit contents for the trivial case which is
1931 always present; $255 pointing to Main. */
1935 = bfd_make_section_old_way (abfd
,
1936 MMIX_REG_CONTENTS_SECTION_NAME
);
1937 rsec
->flags
|= SEC_LINKER_CREATED
;
1939 loc
= mmo_get_loc (rsec
, z
* 8, (255 - z
) * 8);
1940 bfd_put_64 (abfd
, first_octa
, loc
);
1942 for (i
= z
+ 1; i
< 255; i
++)
1944 if (bfd_bread (loc
+ (i
- z
) * 8, 8, abfd
) != 8)
1948 /* Read out the last octabyte, and use it to set the
1950 if (bfd_bread (buf
, 8, abfd
) != 8)
1953 startaddr_octa
= bfd_get_64 (abfd
, buf
);
1956 startaddr_octa
= first_octa
;
1958 if (! bfd_set_start_address (abfd
, startaddr_octa
))
1960 /* Currently this can't fail, but this should handle
1962 bfd_set_error (bfd_error_bad_value
);
1969 /* We read in the symbols now, not later. */
1970 if (y
!= 0 || z
!= 0)
1973 /* xgettext:c-format */
1974 (_("%pB: invalid mmo file: fields y and z of lop_stab"
1975 " non-zero, y: %d, z: %d\n"),
1977 bfd_set_error (bfd_error_bad_value
);
1981 /* Save the location, so we can check that YZ in the LOP_END
1983 stab_loc
= bfd_tell (abfd
);
1985 /* It's not said that an MMO can be without symbols (though
1986 mmixal will refuse to assemble files without Main), but
1987 it seems it would still be a valid mmo-file, so allow it.
1988 We detect the absence of a symbol area in that the upper
1989 limit is computed (from the lop_end YZ field) as 0.
1990 Don't call mmo_get_symbols; it can only detect the end of
1991 a valid symbol trie, not the absence of one. */
1992 if (abfd
->tdata
.mmo_data
->max_symbol_length
!= 0
1993 && ! mmo_get_symbols (abfd
))
1999 /* This must be the last 32-bit word in an mmo file.
2001 struct stat statbuf
;
2002 file_ptr curpos
= bfd_tell (abfd
);
2004 if (bfd_stat (abfd
, &statbuf
) < 0)
2007 if (statbuf
.st_size
!= curpos
)
2010 /* xgettext:c-format */
2011 (_("%pB: invalid mmo file: lop_end not last item in"
2014 bfd_set_error (bfd_error_bad_value
);
2018 /* Check that the YZ field is right. Subtract the size of
2019 this LOP_END in the calculation; YZ does not include
2021 if ((long) (y
* 256 + z
) * 4 != (curpos
- stab_loc
) - 4)
2024 /* xgettext:c-format */
2025 (_("%pB: invalid mmo file: YZ of lop_end (%ld)"
2026 " not equal to the number of tetras to the preceding"
2027 " lop_stab (%ld)\n"),
2028 abfd
, (long) (y
* 256 + z
),
2029 (long) (curpos
- stab_loc
- 4)/4);
2030 bfd_set_error (bfd_error_bad_value
);
2034 bfd_map_over_sections (abfd
, mmo_map_set_sizes
, NULL
);
2041 /* This wasn't a lopcode, so store it in the current section. */
2043 sec
= bfd_make_section_old_way (abfd
, MMO_TEXT_SECTION_NAME
);
2044 mmo_xore_32 (sec
, vma
& ~3, bfd_get_32 (abfd
, buf
));
2051 /* We know this file is a multiple of four bytes (checked in
2052 mmo_object_p), so if we got something other than 0, this was a bad
2053 file (although it's more likely we'll get 0 in that case too).
2054 If we got end-of-file, then there was no lop_stab, so the file has
2057 if (nbytes_read
!= 0)
2058 bfd_set_error (bfd_error_system_call
);
2060 bfd_set_error (bfd_error_bad_value
);
2065 /* Mark the .text and .data section with their normal attribute if they
2066 contain anything. This is not redundant wrt. mmo_decide_section,
2067 since that code might never execute, and conversely the alloc+code
2068 section flags must be set then. */
2069 sec
= bfd_get_section_by_name (abfd
, MMO_TEXT_SECTION_NAME
);
2071 && (bfd_section_flags (sec
) & SEC_HAS_CONTENTS
)
2072 && !bfd_set_section_flags (sec
, (bfd_section_flags (sec
)
2073 | SEC_ALLOC
| SEC_LOAD
| SEC_CODE
)))
2076 sec
= bfd_get_section_by_name (abfd
, MMO_DATA_SECTION_NAME
);
2078 && (bfd_section_flags (sec
) & SEC_HAS_CONTENTS
)
2079 && !bfd_set_section_flags (sec
, (bfd_section_flags (sec
)
2080 | SEC_ALLOC
| SEC_LOAD
| SEC_DATA
)))
2083 /* Free whatever resources we took. */
2084 for (i
= 0; i
< sizeof (file_names
) / sizeof (file_names
[0]); i
++)
2085 free (file_names
[i
]);
2089 /* A hook to set up object file dependent section information. For mmo,
2090 we point out the shape of allocated section contents. */
2093 mmo_new_section_hook (bfd
*abfd
, asection
*newsect
)
2095 if (!newsect
->used_by_bfd
)
2097 /* We zero-fill all fields and assume NULL is represented by an all
2098 zero-bit pattern. */
2099 newsect
->used_by_bfd
2100 = bfd_zalloc (abfd
, sizeof (struct mmo_section_data_struct
));
2101 if (!newsect
->used_by_bfd
)
2105 /* Always align to at least 32-bit words. */
2106 newsect
->alignment_power
= 2;
2107 return _bfd_generic_new_section_hook (abfd
, newsect
);
2110 /* We already have section contents loaded for sections that have
2114 mmo_get_section_contents (bfd
*abfd ATTRIBUTE_UNUSED
,
2118 bfd_size_type bytes_to_do
)
2120 /* Iterate over diminishing chunk sizes, copying contents, like
2121 mmo_set_section_contents. */
2124 /* A minor song-and-dance to make sure we're not bitten by the
2125 distant possibility of the cast from bfd_vma to int making the
2126 chunk zero-sized. */
2128 = (int) bytes_to_do
!= 0 ? bytes_to_do
: MMO_SEC_CONTENTS_CHUNK_SIZE
;
2132 loc
= mmo_get_loc (sec
, sec
->vma
+ offset
, chunk_size
);
2133 while (loc
== NULL
&& (chunk_size
/= 2) != 0);
2135 if (chunk_size
== 0)
2138 memcpy (location
, loc
, chunk_size
);
2140 location
= (bfd_byte
*) location
+ chunk_size
;
2141 bytes_to_do
-= chunk_size
;
2142 offset
+= chunk_size
;
2147 /* Return the amount of memory needed to read the symbol table. */
2150 mmo_get_symtab_upper_bound (bfd
*abfd
)
2152 return (abfd
->symcount
+ 1) * sizeof (asymbol
*);
2155 /* Sort mmo symbols by serial number. */
2158 mmo_sort_mmo_symbols (const void *arg1
, const void *arg2
)
2160 const struct mmo_symbol
*sym1
= *(const struct mmo_symbol
**) arg1
;
2161 const struct mmo_symbol
*sym2
= *(const struct mmo_symbol
**) arg2
;
2163 /* Sort by serial number first. */
2164 if (sym1
->serno
< sym2
->serno
)
2166 else if (sym1
->serno
> sym2
->serno
)
2169 /* Then sort by address of the table entries. */
2170 return ((const char *) arg1
- (const char *) arg2
);
2173 /* Translate the symbol table. */
2176 mmo_canonicalize_symtab (bfd
*abfd
, asymbol
**alocation
)
2178 unsigned int symcount
= bfd_get_symcount (abfd
);
2182 csymbols
= abfd
->tdata
.mmo_data
->csymbols
;
2183 if (csymbols
== NULL
&& symcount
!= 0)
2186 struct mmo_symbol
*s
;
2187 struct mmo_symbol
**msp
;
2189 /* First we store the symbols into the table we'll return, then we
2190 qsort it on the serial number, with secondary on the address of
2191 the symbol, to preserve order if there would be non-unique serial
2193 for (s
= abfd
->tdata
.mmo_data
->symbols
,
2194 msp
= (struct mmo_symbol
**) alocation
;
2201 qsort (alocation
, symcount
, sizeof (struct mmo_symbol
*),
2202 mmo_sort_mmo_symbols
);
2204 csymbols
= (asymbol
*) bfd_alloc (abfd
, symcount
* sizeof (asymbol
));
2205 if (csymbols
== NULL
)
2207 abfd
->tdata
.mmo_data
->csymbols
= csymbols
;
2209 for (msp
= (struct mmo_symbol
**) alocation
, c
= csymbols
;
2216 c
->value
= s
->value
;
2217 c
->flags
= BSF_GLOBAL
;
2219 if (s
->sym_type
== mmo_data_sym
)
2222 = bfd_get_section_by_name (abfd
, MMO_DATA_SECTION_NAME
);
2224 if (c
->section
== NULL
)
2225 c
->section
= bfd_abs_section_ptr
;
2227 c
->value
-= c
->section
->vma
;
2229 else if (s
->sym_type
== mmo_undef_sym
)
2230 c
->section
= bfd_und_section_ptr
;
2231 else if (s
->sym_type
== mmo_reg_sym
)
2234 = bfd_make_section_old_way (abfd
, MMIX_REG_SECTION_NAME
);
2235 c
->section
->flags
|= SEC_LINKER_CREATED
;
2240 = bfd_get_section_by_name (abfd
, MMO_TEXT_SECTION_NAME
);
2244 && c
->value
>= textsec
->vma
2245 && c
->value
<= textsec
->vma
+ textsec
->size
)
2247 c
->section
= textsec
;
2248 c
->value
-= c
->section
->vma
;
2250 /* In mmo, symbol types depend on the VMA. Therefore, if
2251 the data section isn't within the usual bounds, its
2252 symbols are marked as absolute. Correct that. This
2253 means we can't have absolute symbols with values matching
2254 data section addresses, but we also can't have with
2255 absolute symbols with values matching text section
2256 addresses. For such needs, use the ELF format. */
2258 = bfd_get_section_by_name (abfd
,
2259 MMO_DATA_SECTION_NAME
))
2261 && c
->value
>= datasec
->vma
2262 && c
->value
<= datasec
->vma
+ datasec
->size
)
2264 c
->section
= datasec
;
2265 c
->value
-= c
->section
->vma
;
2268 c
->section
= bfd_abs_section_ptr
;
2275 /* Last, overwrite the incoming table with the right-type entries. */
2276 for (i
= 0; i
< symcount
; i
++)
2277 *alocation
++ = csymbols
++;
2283 /* Get information about a symbol. */
2286 mmo_get_symbol_info (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2287 asymbol
*symbol
, symbol_info
*ret
)
2289 bfd_symbol_info (symbol
, ret
);
2293 mmo_print_symbol (bfd
*abfd
, void *afile
, asymbol
*symbol
,
2294 bfd_print_symbol_type how
)
2296 FILE *file
= (FILE *) afile
;
2300 case bfd_print_symbol_name
:
2301 fprintf (file
, "%s", symbol
->name
);
2304 bfd_print_symbol_vandf (abfd
, file
, symbol
);
2306 fprintf (file
, " %-5s %s",
2307 symbol
->section
->name
,
2312 /* We can't map a file directly into executable code, so the
2313 size of header information is irrelevant. */
2316 mmo_sizeof_headers (bfd
*abfd ATTRIBUTE_UNUSED
,
2317 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2322 /* Write the (section-neutral) file preamble. */
2325 mmo_internal_write_header (bfd
*abfd
)
2327 const char lop_pre_bfd
[] = { LOP
, LOP_PRE
, 1, 1};
2329 if (bfd_bwrite (lop_pre_bfd
, 4, abfd
) != 4)
2332 /* Copy creation time of original file. */
2333 if (bfd_bwrite (abfd
->tdata
.mmo_data
->created
, 4, abfd
) != 4)
2339 /* Write the LOP_POST record, with global register initializations.
2340 Z is the Z field of the LOP_POST, corresponding to 255 - number of
2341 registers at DATA. The Z = 255 field is filled in with the
2345 mmo_internal_write_post (bfd
*abfd
, int z
, asection
*sec
)
2349 mmo_write_tetra_raw (abfd
, (LOP
<< 24) | (LOP_POST
<< 16) | z
);
2351 for (i
= z
; i
< 255; i
++)
2353 bfd_byte
*data
= mmo_get_loc (sec
, i
* 8, 8);
2355 if (bfd_bwrite (data
, 8, abfd
) != 8)
2359 /* For Z == $255, we always emit the start location; supposedly Main,
2360 but we have it handy at bfd_get_start_address. If we're called with
2361 Z == 255, don't assume DATA is valid. */
2362 bfd_put_64 (abfd
, bfd_get_start_address (abfd
), buf
);
2364 return ! abfd
->tdata
.mmo_data
->have_error
&& bfd_bwrite (buf
, 8, abfd
) == 8;
2367 /* Translate to and from BFD flags. This is to make sure that we don't
2368 get bitten by BFD flag number changes. */
2371 mmo_sec_flags_from_bfd_flags (flagword flags
)
2373 flagword oflags
= 0;
2375 if (flags
& SEC_ALLOC
)
2376 oflags
|= MMO_SEC_ALLOC
;
2377 if (flags
& SEC_LOAD
)
2378 oflags
|= MMO_SEC_LOAD
;
2379 if (flags
& SEC_RELOC
)
2380 oflags
|= MMO_SEC_RELOC
;
2381 if (flags
& SEC_READONLY
)
2382 oflags
|= MMO_SEC_READONLY
;
2383 if (flags
& SEC_CODE
)
2384 oflags
|= MMO_SEC_CODE
;
2385 if (flags
& SEC_DATA
)
2386 oflags
|= MMO_SEC_DATA
;
2387 if (flags
& SEC_NEVER_LOAD
)
2388 oflags
|= MMO_SEC_NEVER_LOAD
;
2389 if (flags
& SEC_IS_COMMON
)
2390 oflags
|= MMO_SEC_IS_COMMON
;
2391 if (flags
& SEC_DEBUGGING
)
2392 oflags
|= MMO_SEC_DEBUGGING
;
2398 bfd_sec_flags_from_mmo_flags (flagword flags
)
2400 flagword oflags
= 0;
2402 if (flags
& MMO_SEC_ALLOC
)
2403 oflags
|= SEC_ALLOC
;
2404 if (flags
& MMO_SEC_LOAD
)
2406 if (flags
& MMO_SEC_RELOC
)
2407 oflags
|= SEC_RELOC
;
2408 if (flags
& MMO_SEC_READONLY
)
2409 oflags
|= SEC_READONLY
;
2410 if (flags
& MMO_SEC_CODE
)
2412 if (flags
& MMO_SEC_DATA
)
2414 if (flags
& MMO_SEC_NEVER_LOAD
)
2415 oflags
|= SEC_NEVER_LOAD
;
2416 if (flags
& MMO_SEC_IS_COMMON
)
2417 oflags
|= SEC_IS_COMMON
;
2418 if (flags
& MMO_SEC_DEBUGGING
)
2419 oflags
|= SEC_DEBUGGING
;
2424 /* Return TRUE iff the leading or trailing tetrabyte in SEC is defined and
2428 mmo_has_leading_or_trailing_zero_tetra_p (bfd
*abfd
, asection
*sec
)
2430 bfd_vma secaddr
= bfd_section_vma (sec
);
2435 if (bfd_get_32 (abfd
, mmo_get_loc (sec
, secaddr
, 4)) == 0
2436 && bfd_get_32 (abfd
,
2437 mmo_get_loc (sec
, secaddr
+ sec
->size
- 4, 4)) == 0)
2443 /* Write a section. */
2446 mmo_internal_write_section (bfd
*abfd
, asection
*sec
)
2448 /* We do it differently depending on what section this is:
2450 ".text": Output, prepended by information about the first source file
2451 (not yet implemented.)
2455 (".MMIX.reg_contents": Not handled here.)
2457 Anything else: Output inside a lop_spec 80, in the format described
2460 if (strcmp (sec
->name
, MMO_TEXT_SECTION_NAME
) == 0)
2462 bfd_vma secaddr
= bfd_section_vma (sec
);
2464 /* Because leading and trailing zeros are omitted in output, we need to
2465 specify the section boundaries so they're correct when the file
2466 is read in again. That's also the case if this section is
2467 specified as not within its usual boundaries or alignments. */
2469 && (secaddr
+ sec
->size
>= (bfd_vma
) 1 << 56
2470 || (secaddr
& 3) != 0
2471 || (sec
->size
& 3) != 0
2472 || mmo_has_leading_or_trailing_zero_tetra_p (abfd
, sec
)))
2474 if (!mmo_write_section_description (abfd
, sec
))
2478 /* FIXME: Output source file name and line number. */
2479 return mmo_write_loc_chunk_list (abfd
, mmo_section_data (sec
)->head
);
2481 else if (strcmp (sec
->name
, MMO_DATA_SECTION_NAME
) == 0)
2483 bfd_vma secaddr
= bfd_section_vma (sec
);
2485 /* Same goes as for MMO_TEXT_SECTION_NAME above. */
2487 && (secaddr
< (bfd_vma
) 0x20 << 56
2488 || secaddr
+ sec
->size
>= (bfd_vma
) 0x21 << 56
2489 || (secaddr
& 3) != 0
2490 || (sec
->size
& 3) != 0
2491 || mmo_has_leading_or_trailing_zero_tetra_p (abfd
, sec
)))
2493 if (!mmo_write_section_description (abfd
, sec
))
2497 return mmo_write_loc_chunk_list (abfd
, mmo_section_data (sec
)->head
);
2499 else if (strcmp (sec
->name
, MMIX_REG_CONTENTS_SECTION_NAME
) == 0)
2500 /* Not handled here. */
2502 /* This would normally be an abort call since this can't happen, but
2503 we don't do that. */
2504 bfd_set_error (bfd_error_bad_value
);
2507 else if (startswith (sec
->name
, MMIX_OTHER_SPEC_SECTION_PREFIX
))
2509 int n
= atoi (sec
->name
+ strlen (MMIX_OTHER_SPEC_SECTION_PREFIX
));
2511 mmo_write_tetra_raw (abfd
, (LOP
<< 24) | (LOP_SPEC
<< 16) | n
);
2512 return (! abfd
->tdata
.mmo_data
->have_error
2513 && mmo_write_chunk_list (abfd
, mmo_section_data (sec
)->head
));
2515 /* Ignore sections that are just allocated or empty; we write out
2517 else if ((bfd_section_flags (sec
) & SEC_HAS_CONTENTS
) != 0
2520 if (!mmo_write_section_description (abfd
, sec
))
2523 /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually
2525 if (bfd_section_flags (sec
) & SEC_LOAD
)
2526 return (! abfd
->tdata
.mmo_data
->have_error
2527 && mmo_write_loc_chunk_list (abfd
,
2528 mmo_section_data (sec
)->head
));
2529 return (! abfd
->tdata
.mmo_data
->have_error
2530 && mmo_write_chunk_list (abfd
, mmo_section_data (sec
)->head
));
2533 /* Some section without contents. */
2537 /* Write the description of a section, extended-mmo-style. */
2540 mmo_write_section_description (bfd
*abfd
, asection
*sec
)
2542 /* Keep the following document-comment formatted the way it is. */
2545 mmo section mapping, , Symbol-table, mmo
2549 The implementation in BFD uses special data type 80 (decimal) to
2550 encapsulate and describe named sections, containing e.g.@: debug
2551 information. If needed, any datum in the encapsulation will be
2552 quoted using lop_quote. First comes a 32-bit word holding the
2553 number of 32-bit words containing the zero-terminated zero-padded
2554 segment name. After the name there's a 32-bit word holding flags
2555 describing the section type. Then comes a 64-bit big-endian word
2556 with the section length (in bytes), then another with the section
2557 start address. Depending on the type of section, the contents
2558 might follow, zero-padded to 32-bit boundary. For a loadable
2559 section (such as data or code), the contents might follow at some
2560 later point, not necessarily immediately, as a lop_loc with the
2561 same start address as in the section description, followed by the
2562 contents. This in effect forms a descriptor that must be emitted
2563 before the actual contents. Sections described this way must not
2566 For areas that don't have such descriptors, synthetic sections are
2567 formed by BFD. Consecutive contents in the two memory areas
2568 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} and
2569 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} are entered in
2570 sections named <<.text>> and <<.data>> respectively. If an area
2571 is not otherwise described, but would together with a neighboring
2572 lower area be less than @samp{0x40000000} bytes long, it is joined
2573 with the lower area and the gap is zero-filled. For other cases,
2574 a new section is formed, named <<.MMIX.sec.@var{n}>>. Here,
2575 @var{n} is a number, a running count through the mmo file,
2579 A loadable section specified as:
2581 | .section secname,"ax"
2582 | TETRA 1,2,3,4,-1,-2009
2585 and linked to address @samp{0x4}, is represented by the sequence:
2587 | 0x98080050 - lop_spec 80
2588 | 0x00000002 - two 32-bit words for the section name
2589 | 0x7365636e - "secn"
2590 | 0x616d6500 - "ame\0"
2591 | 0x00000033 - flags CODE, READONLY, LOAD, ALLOC
2592 | 0x00000000 - high 32 bits of section length
2593 | 0x0000001c - section length is 28 bytes; 6 * 4 + 1 + alignment to 32 bits
2594 | 0x00000000 - high 32 bits of section address
2595 | 0x00000004 - section address is 4
2596 | 0x98010002 - 64 bits with address of following data
2597 | 0x00000000 - high 32 bits of address
2598 | 0x00000004 - low 32 bits: data starts at address 4
2604 | 0xfffff827 - -2009
2605 | 0x50000000 - 80 as a byte, padded with zeros.
2607 Note that the lop_spec wrapping does not include the section
2608 contents. Compare this to a non-loaded section specified as:
2611 | TETRA 200001,100002
2614 This, when linked to address @samp{0x200000000000001c}, is
2617 | 0x98080050 - lop_spec 80
2618 | 0x00000002 - two 32-bit words for the section name
2619 | 0x7365636e - "thir"
2620 | 0x616d6500 - "dsec"
2621 | 0x00000010 - flag READONLY
2622 | 0x00000000 - high 32 bits of section length
2623 | 0x0000000c - section length is 12 bytes; 2 * 4 + 2 + alignment to 32 bits
2624 | 0x20000000 - high 32 bits of address
2625 | 0x0000001c - low 32 bits of address 0x200000000000001c
2626 | 0x00030d41 - 200001
2627 | 0x000186a2 - 100002
2628 | 0x26280000 - 38, 40 as bytes, padded with zeros
2630 For the latter example, the section contents must not be
2631 loaded in memory, and is therefore specified as part of the
2632 special data. The address is usually unimportant but might
2633 provide information for e.g.@: the DWARF 2 debugging format. */
2635 mmo_write_tetra_raw (abfd
, LOP_SPEC_SECTION
);
2636 mmo_write_tetra (abfd
, (strlen (sec
->name
) + 3) / 4);
2637 mmo_write_chunk (abfd
, (bfd_byte
*) sec
->name
, strlen (sec
->name
));
2638 mmo_flush_chunk (abfd
);
2639 /* FIXME: We can get debug sections (.debug_line & Co.) with a section
2640 flag still having SEC_RELOC set. Investigate. This might be true
2641 for all alien sections; perhaps mmo.em should clear that flag. Might
2642 be related to weak references. */
2643 mmo_write_tetra (abfd
,
2644 mmo_sec_flags_from_bfd_flags (bfd_section_flags (sec
)));
2645 mmo_write_octa (abfd
, sec
->size
);
2646 mmo_write_octa (abfd
, bfd_section_vma (sec
));
2650 /* We save up all data before output. */
2653 mmo_set_section_contents (bfd
*abfd ATTRIBUTE_UNUSED
, sec_ptr sec
,
2654 const void *location
, file_ptr offset
,
2655 bfd_size_type bytes_to_do
)
2657 /* Iterate over diminishing chunk sizes, copying contents. */
2660 /* A minor song-and-dance to make sure we're not bitten by the
2661 distant possibility of the cast from bfd_vma to int making the
2662 chunk zero-sized. */
2664 = (int) bytes_to_do
!= 0 ? bytes_to_do
: MMO_SEC_CONTENTS_CHUNK_SIZE
;
2668 loc
= mmo_get_loc (sec
, sec
->vma
+ offset
, chunk_size
);
2669 while (loc
== NULL
&& (chunk_size
/= 2) != 0);
2671 if (chunk_size
== 0)
2674 memcpy (loc
, location
, chunk_size
);
2676 location
= (bfd_byte
*) location
+ chunk_size
;
2677 bytes_to_do
-= chunk_size
;
2678 offset
+= chunk_size
;
2683 /* Add a symbol to a trie-tree. */
2686 mmo_internal_add_3_sym (bfd
*abfd
, struct mmo_symbol_trie
*rootp
,
2687 const struct mmo_symbol
*symp
)
2689 const char *name
= symp
->name
;
2690 struct mmo_symbol_trie
*trie
= rootp
;
2691 struct mmo_symbol_trie
**triep
= NULL
;
2693 while (*name
&& trie
!= NULL
)
2695 if (*name
< trie
->symchar
)
2697 triep
= &trie
->left
;
2700 else if (*name
> trie
->symchar
)
2702 triep
= &trie
->right
;
2705 else if (*name
== trie
->symchar
)
2707 triep
= &trie
->middle
;
2710 /* Make sure "trie" points to where we should fill in the
2711 current symbol whenever we've iterated through "name". We
2712 would lose the right position if we encounter "foobar" then
2715 trie
= trie
->middle
;
2721 /* Create middle branches for the rest of the characters. */
2722 trie
= bfd_zalloc (abfd
, sizeof (struct mmo_symbol_trie
));
2724 trie
->symchar
= *name
++;
2725 triep
= &trie
->middle
;
2728 /* We discover a duplicate symbol rather late in the process, but still;
2729 we discover it and bail out. */
2730 if (trie
->sym
.name
!= NULL
)
2733 /* xgettext:c-format */
2734 (_("%pB: invalid symbol table: duplicate symbol `%s'\n"),
2735 abfd
, trie
->sym
.name
);
2736 bfd_set_error (bfd_error_bad_value
);
2740 memcpy (&trie
->sym
, symp
, sizeof *symp
);
2744 /* Find out the length of the serialized version of a trie in bytes. */
2747 mmo_internal_3_length (bfd
*abfd
, struct mmo_symbol_trie
*trie
)
2749 /* First, one for the control byte. */
2750 unsigned int length
= 1;
2755 /* Add in the recursion to the left. */
2756 length
+= mmo_internal_3_length (abfd
, trie
->left
);
2758 /* Add in the middle trie and the character. */
2759 length
+= 1 + mmo_internal_3_length (abfd
, trie
->middle
);
2761 /* Add in the recursion to the right. */
2762 length
+= mmo_internal_3_length (abfd
, trie
->right
);
2764 /* Add in bytes for the symbol (if this is an endnode). */
2765 if (trie
->sym
.name
!= NULL
)
2767 unsigned int serno
= trie
->sym
.serno
;
2769 /* First what it takes to encode the value. */
2770 if (trie
->sym
.sym_type
== mmo_reg_sym
)
2772 else if (trie
->sym
.sym_type
== mmo_undef_sym
)
2776 bfd_vma value
= trie
->sym
.value
;
2778 /* Coded in one to eight following bytes. */
2779 if (trie
->sym
.sym_type
== mmo_data_sym
)
2780 value
-= (bfd_vma
) 0x20 << 56;
2790 /* Find out what it takes to encode the serial number. */
2802 /* Helper function for outputting the serial number of a symbol, output as
2803 a variant of leb128 (see dwarf2 documentation) which could be called
2804 beb128. Using a helper function and recursion simplifies debugging. */
2807 mmo_beb128_out (bfd
*abfd
, int serno
, int marker
)
2810 mmo_beb128_out (abfd
, serno
>> 7, 0);
2811 mmo_write_byte (abfd
, marker
| (serno
& 0x7f));
2814 /* Serialize a trie. */
2817 mmo_internal_3_dump (bfd
*abfd
, struct mmo_symbol_trie
*trie
)
2819 bfd_byte control
= 0;
2825 control
|= MMO3_LEFT
;
2828 control
|= MMO3_MIDDLE
;
2831 control
|= MMO3_RIGHT
;
2833 if (trie
->sym
.name
!= NULL
)
2835 /* Encode the symbol type and length of value bytes. */
2836 if (trie
->sym
.sym_type
== mmo_reg_sym
)
2837 control
|= MMO3_REGQUAL_BITS
;
2838 else if (trie
->sym
.sym_type
== mmo_undef_sym
)
2839 control
|= MMO3_UNDEF
;
2842 bfd_vma value
= trie
->sym
.value
;
2844 /* Coded in 1..8 following bytes. */
2845 if (trie
->sym
.sym_type
== mmo_data_sym
)
2847 control
|= MMO3_DATA
;
2848 value
-= (bfd_vma
) 0x20 << 56;
2860 /* The control byte is output before recursing. */
2861 mmo_write_byte (abfd
, control
);
2863 mmo_internal_3_dump (abfd
, trie
->left
);
2865 if (control
& MMO3_SYMBITS
)
2867 mmo_write_byte (abfd
, trie
->symchar
);
2869 if (trie
->sym
.name
!= NULL
)
2871 if (trie
->sym
.sym_type
== mmo_reg_sym
)
2872 mmo_write_byte (abfd
, trie
->sym
.value
);
2873 else if (trie
->sym
.sym_type
== mmo_undef_sym
)
2875 mmo_write_byte (abfd
, 0);
2876 mmo_write_byte (abfd
, 0);
2880 bfd_vma value
= trie
->sym
.value
;
2882 bfd_byte byte_n
= control
& 15;
2884 /* Coded in 1..8 following bytes. Note that the value is
2885 shifted out big-endian. */
2886 if (trie
->sym
.sym_type
== mmo_data_sym
)
2888 value
-= (bfd_vma
) 0x20 << 56;
2894 mmo_write_byte (abfd
, (value
>> ((byte_n
- 1) * 8)) & 0xff);
2897 while (byte_n
!= 0);
2900 mmo_beb128_out (abfd
, trie
->sym
.serno
, 128);
2902 mmo_internal_3_dump (abfd
, trie
->middle
);
2904 mmo_internal_3_dump (abfd
, trie
->right
);
2907 /* Write symbols in mmo format. Also write the lop_end terminator. */
2910 mmo_write_symbols_and_terminator (bfd
*abfd
)
2912 int count
= bfd_get_symcount (abfd
);
2914 asymbol
**orig_table
= bfd_get_outsymbols (abfd
);
2916 struct mmo_symbol_trie root
;
2921 /* Create a symbol for "Main". */
2922 asymbol
*fakemain
= bfd_make_empty_symbol (abfd
);
2924 fakemain
->flags
= BSF_GLOBAL
;
2925 fakemain
->value
= bfd_get_start_address (abfd
);
2926 fakemain
->name
= MMIX_START_SYMBOL_NAME
;
2927 fakemain
->section
= bfd_abs_section_ptr
;
2929 memset (&root
, 0, sizeof (root
));
2931 /* Make all symbols take a left turn. */
2932 root
.symchar
= 0xff;
2934 /* There must always be a ":Main", so we'll add one if there are no
2935 symbols. Make sure we have room for it. */
2936 table
= bfd_alloc (abfd
, (count
+ 1) * sizeof (asymbol
*));
2941 memcpy (table
, orig_table
, count
* sizeof (asymbol
*));
2943 /* Move :Main (if there is one) to the first position. This is
2944 necessary to get the same layout of the trie-tree when linking as
2945 when objcopying the result as in the objcopy.exp test "simple objcopy
2946 of executable". It also automatically takes care of assigning serial
2947 number 1 to :Main (as is mandatory). */
2948 for (i
= 0; i
< count
; i
++)
2949 if (table
[i
] != NULL
2950 && strcmp (table
[i
]->name
, MMIX_START_SYMBOL_NAME
) == 0
2951 && (table
[i
]->flags
& (BSF_DEBUGGING
|BSF_GLOBAL
)) == BSF_GLOBAL
)
2953 asymbol
*mainsym
= table
[i
];
2956 + mainsym
->section
->output_section
->vma
2957 + mainsym
->section
->output_offset
);
2958 memcpy (table
+ 1, orig_table
, i
* sizeof (asymbol
*));
2961 /* Check that the value assigned to :Main is the same as the entry
2962 address. The default linker script asserts this. This is as
2963 good a place as any to check this consistency. */
2964 if (mainvalue
!= bfd_get_start_address (abfd
)
2965 && !mmo_ignore_symbol_consistency (abfd
))
2967 /* Arbitrary buffer to hold the printable representation of a
2970 char vmas_start
[40];
2971 bfd_vma vma_start
= bfd_get_start_address (abfd
);
2973 sprintf_vma (vmas_main
, mainvalue
);
2974 sprintf_vma (vmas_start
, vma_start
);
2977 /* xgettext:c-format */
2978 (_("%pB: bad symbol definition: `Main' set to %s rather"
2979 " than the start address %s\n"),
2980 abfd
, vmas_main
, vmas_start
);
2981 bfd_set_error (bfd_error_bad_value
);
2986 if (i
== count
&& count
!= 0)
2988 /* When there are symbols, there must be a :Main. There was no
2989 :Main, so we need to add it manually. */
2990 memcpy (table
+ 1, orig_table
, count
* sizeof (asymbol
*));
2991 table
[0] = fakemain
;
2995 /* Don't bother inspecting symbols in plugin dummy objects; their
2996 symbols aren't fully inspectable. */
2997 if ((abfd
->flags
& BFD_PLUGIN
) == 0)
2999 for (i
= 0, serno
= 1; i
< count
&& table
[i
] != NULL
; i
++)
3001 asymbol
*s
= table
[i
];
3003 /* It's not enough to consult bfd_is_local_label, since it does not
3004 mean "local" in the sense of linkable-and-observable-after-link.
3005 Let's just check the BSF_GLOBAL flag.
3007 Also, don't export symbols with characters not in the
3009 if ((s
->flags
& (BSF_DEBUGGING
|BSF_GLOBAL
)) == BSF_GLOBAL
3011 valid_mmo_symbol_character_set
) == strlen (s
->name
))
3013 struct mmo_symbol sym
;
3014 memset (&sym
, 0, sizeof (sym
));
3016 /* Need to strip const here; strdup:ing would leak and the
3017 existing string must be safe to reuse. */
3018 sym
.name
= (char *) s
->name
;
3021 + s
->section
->output_section
->vma
3022 + s
->section
->output_offset
;
3024 if (bfd_is_und_section (s
->section
))
3025 sym
.sym_type
= mmo_undef_sym
;
3026 else if (strcmp (s
->section
->name
, MMO_DATA_SECTION_NAME
) == 0
3027 /* The encoding of data symbols require that the "rest"
3028 of the value fits in 6 bytes, so the upper two bytes
3029 must be 0x2000. All other symbols get to be the
3031 && (sym
.value
>> 48) == 0x2000)
3032 sym
.sym_type
= mmo_data_sym
;
3033 else if (strcmp (s
->section
->name
, MMIX_REG_SECTION_NAME
) == 0)
3034 sym
.sym_type
= mmo_reg_sym
;
3035 else if (strcmp (s
->section
->name
,
3036 MMIX_REG_CONTENTS_SECTION_NAME
) == 0)
3038 sym
.sym_type
= mmo_reg_sym
;
3042 sym
.sym_type
= mmo_abs_sym
;
3044 /* FIXME: We assume the order of the received symbols is an
3045 ordered mapping of the serial numbers. This is not
3046 necessarily true if we e.g. objcopy a mmo file to another and
3047 there are gaps in the numbering. Not sure if this can
3048 happen. Not sure what to do. */
3049 sym
.serno
= serno
++;
3051 if (! mmo_internal_add_3_sym (abfd
, &root
, &sym
))
3057 /* Change the root node to be a ":"-prefix. */
3059 root
.middle
= root
.left
;
3063 /* We have to find out if we can fit the whole symbol table in the mmo
3064 symtab. It would be bad to assume we can always fit it in 262144
3065 bytes. If we can't, just leave the Main symbol. */
3066 trie_len
= (mmo_internal_3_length (abfd
, &root
) + 3)/4;
3068 if (trie_len
> 0xffff)
3070 /* Test this code by using a lower limit in the test above and check
3071 that the single "Main" symbol is emitted and handled properly.
3072 There's no specific test-case. */
3073 struct mmo_symbol sym
;
3076 /* xgettext:c-format */
3077 (_("%pB: warning: symbol table too large for mmo, larger than 65535"
3078 " 32-bit words: %d. Only `Main' will be emitted.\n"),
3081 memset (&sym
, 0, sizeof (sym
));
3082 sym
.sym_type
= mmo_abs_sym
;
3083 sym
.name
= MMIX_START_SYMBOL_NAME
;
3085 sym
.value
= bfd_get_start_address (abfd
);
3087 /* Then patch up a symbol table to be just the ":Main" symbol. */
3088 memset (&root
, 0, sizeof (root
));
3089 root
.left
= root
.middle
;
3090 root
.symchar
= 0xff;
3094 if (! mmo_internal_add_3_sym (abfd
, &root
, &sym
))
3098 root
.middle
= root
.left
;
3102 trie_len
= (mmo_internal_3_length (abfd
, &root
) + 3)/4;
3105 /* Reset the written-bytes counter. */
3106 abfd
->tdata
.mmo_data
->byte_no
= 0;
3108 /* Put out the lop_stab mark. */
3109 bfd_put_32 (abfd
, (LOP
<< 24) | (LOP_STAB
<< 16), buf
);
3110 if (bfd_bwrite (buf
, 4, abfd
) != 4)
3113 /* Dump out symbols. */
3114 mmo_internal_3_dump (abfd
, &root
);
3116 if (trie_len
!= (abfd
->tdata
.mmo_data
->byte_no
+ 3)/4)
3118 /* I haven't seen this trig. It seems no use claiming this case
3119 isn't debugged and abort if we get here. Instead emit a
3120 diagnostic and fail "normally". */
3122 /* xgettext:c-format */
3123 (_("%pB: internal error, symbol table changed size from %d to %d"
3126 (abfd
->tdata
.mmo_data
->byte_no
+ 3)/4);
3127 bfd_set_error (bfd_error_bad_value
);
3131 /* Dump out remaining bytes in the buffer and handle I/O errors by
3132 propagating errors. */
3133 if ((abfd
->tdata
.mmo_data
->byte_no
% 4) != 0
3134 || abfd
->tdata
.mmo_data
->have_error
)
3136 memset (abfd
->tdata
.mmo_data
->buf
+ (abfd
->tdata
.mmo_data
->byte_no
% 4),
3137 0, 4 - (abfd
->tdata
.mmo_data
->byte_no
% 4));
3139 if (abfd
->tdata
.mmo_data
->have_error
3140 || bfd_bwrite (abfd
->tdata
.mmo_data
->buf
, 4, abfd
) != 4)
3144 bfd_put_32 (abfd
, (LOP
<< 24) | (LOP_END
<< 16) | trie_len
, buf
);
3145 return bfd_bwrite (buf
, 4, abfd
) == 4;
3148 /* Write section unless it is the register contents section. For that, we
3149 instead store the section in the supplied pointer. This function is
3150 used through bfd_map_over_sections. */
3153 mmo_write_section_unless_reg_contents (bfd
*abfd
, asection
*sec
, void *p
)
3155 struct mmo_write_sec_info
*infop
= (struct mmo_write_sec_info
*) p
;
3157 if (! infop
->retval
)
3160 if (strcmp (sec
->name
, MMIX_REG_CONTENTS_SECTION_NAME
) == 0)
3162 infop
->reg_section
= sec
;
3166 /* Exclude the convenience register section. */
3167 if (strcmp (sec
->name
, MMIX_REG_SECTION_NAME
) == 0)
3169 if (bfd_section_flags (sec
) & SEC_HAS_CONTENTS
)
3171 /* Make sure it hasn't got contents. It seems impossible to
3172 make it carry contents, so we don't have a test-case for
3175 /* xgettext:c-format */
3176 (_("%pB: internal error, internal register section %pA had"
3179 bfd_set_error (bfd_error_bad_value
);
3180 infop
->retval
= false;
3187 infop
->retval
= mmo_internal_write_section (abfd
, sec
);
3190 /* Do the actual output of a file. Assumes mmo_set_section_contents is
3194 mmo_write_object_contents (bfd
*abfd
)
3196 struct mmo_write_sec_info wsecinfo
;
3198 /* First, there are a few words of preamble. */
3199 if (! mmo_internal_write_header (abfd
))
3202 wsecinfo
.reg_section
= NULL
;
3203 wsecinfo
.retval
= true;
3205 bfd_map_over_sections (abfd
, mmo_write_section_unless_reg_contents
,
3208 if (! wsecinfo
.retval
)
3211 if (wsecinfo
.reg_section
!= NULL
)
3213 asection
*sec
= wsecinfo
.reg_section
;
3214 unsigned int z
= (unsigned int) (sec
->vma
/ 8);
3216 /* Registers 0..31 must not be global. Do sanity check on the "vma"
3217 of the register contents section and check that it corresponds to
3218 the length of the section. */
3219 if (z
< 32 || z
>= 255 || (sec
->vma
& 7) != 0
3220 || sec
->vma
!= 256 * 8 - sec
->size
- 8)
3222 bfd_set_error (bfd_error_bad_value
);
3225 /* There must always be at least one such register. */
3227 (_("%pB: no initialized registers; section length 0\n"),
3229 else if (sec
->vma
> (256 - 32) * 8)
3230 /* Provide better error message for the case of too many
3231 global registers. */
3233 /* xgettext:c-format */
3234 (_("%pB: too many initialized registers; section length %" PRId64
),
3235 abfd
, (int64_t) sec
->size
);
3238 /* xgettext:c-format */
3239 (_("%pB: invalid start address for initialized registers of"
3240 " length %" PRId64
": %#" PRIx64
),
3241 abfd
, (int64_t) sec
->size
, (uint64_t) sec
->vma
);
3246 if (! mmo_internal_write_post (abfd
, z
, sec
))
3250 if (! mmo_internal_write_post (abfd
, 255, NULL
))
3253 return mmo_write_symbols_and_terminator (abfd
);
3256 /* If there's anything in particular in a mmo bfd that we want to free,
3257 make this a real function. Only do this if you see major memory
3258 thrashing; zealous free:ing will cause unwanted behavior, especially if
3259 you "free" memory allocated with "bfd_alloc", or even "bfd_release" a
3260 block allocated with "bfd_alloc"; they're really allocated from an
3261 obstack, and we don't know what was allocated there since this
3262 particular allocation. */
3264 #define mmo_close_and_cleanup _bfd_generic_close_and_cleanup
3265 #define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3267 /* Perhaps we need to adjust this one; mmo labels (originally) without a
3268 leading ':' might more appropriately be called local. */
3269 #define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name
3270 #define mmo_bfd_is_target_special_symbol _bfd_bool_bfd_asymbol_false
3272 #define mmo_get_symbol_version_string \
3273 _bfd_nosymbols_get_symbol_version_string
3275 /* Is this one really used or defined by anyone? */
3276 #define mmo_get_lineno _bfd_nosymbols_get_lineno
3278 /* FIXME: We can do better on this one, if we have a dwarf2 .debug_line
3279 section or if MMO line numbers are implemented. */
3280 #define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line
3281 #define mmo_find_line _bfd_nosymbols_find_line
3282 #define mmo_find_inliner_info _bfd_nosymbols_find_inliner_info
3283 #define mmo_make_empty_symbol _bfd_generic_make_empty_symbol
3284 #define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
3285 #define mmo_read_minisymbols _bfd_generic_read_minisymbols
3286 #define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3288 #define mmo_get_section_contents_in_window \
3289 _bfd_generic_get_section_contents_in_window
3290 #define mmo_bfd_get_relocated_section_contents \
3291 bfd_generic_get_relocated_section_contents
3292 #define mmo_bfd_gc_sections bfd_generic_gc_sections
3293 #define mmo_bfd_lookup_section_flags bfd_generic_lookup_section_flags
3294 #define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3295 #define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols
3296 #define mmo_bfd_link_just_syms _bfd_generic_link_just_syms
3297 #define mmo_bfd_copy_link_hash_symbol_type \
3298 _bfd_generic_copy_link_hash_symbol_type
3299 #define mmo_bfd_final_link _bfd_generic_final_link
3300 #define mmo_bfd_link_split_section _bfd_generic_link_split_section
3301 #define mmo_bfd_link_check_relocs _bfd_generic_link_check_relocs
3303 /* Strictly speaking, only MMIX uses this restricted format, but let's not
3304 stop anybody from shooting themselves in the foot. */
3305 #define mmo_set_arch_mach bfd_default_set_arch_mach
3306 #define mmo_bfd_relax_section bfd_generic_relax_section
3307 #define mmo_bfd_merge_sections bfd_generic_merge_sections
3308 #define mmo_bfd_is_group_section bfd_generic_is_group_section
3309 #define mmo_bfd_group_name bfd_generic_group_name
3310 #define mmo_bfd_discard_group bfd_generic_discard_group
3311 #define mmo_section_already_linked \
3312 _bfd_generic_section_already_linked
3313 #define mmo_bfd_define_common_symbol bfd_generic_define_common_symbol
3314 #define mmo_bfd_link_hide_symbol _bfd_generic_link_hide_symbol
3315 #define mmo_bfd_define_start_stop bfd_generic_define_start_stop
3317 /* We want to copy time of creation, otherwise we'd use
3318 BFD_JUMP_TABLE_COPY (_bfd_generic). */
3319 #define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3320 #define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3321 #define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3322 #define mmo_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
3323 #define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3324 #define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3326 const bfd_target mmix_mmo_vec
=
3329 bfd_target_mmo_flavour
,
3330 BFD_ENDIAN_BIG
, /* target byte order */
3331 BFD_ENDIAN_BIG
, /* target headers byte order */
3333 /* FIXME: Might need adjustments. */
3334 (HAS_RELOC
| EXEC_P
| /* object flags */
3335 HAS_LINENO
| HAS_DEBUG
|
3336 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
),
3338 /* FIXME: Might need adjustments. */
3339 (SEC_CODE
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
3340 | SEC_READONLY
| SEC_EXCLUDE
| SEC_DEBUGGING
| SEC_IN_MEMORY
),
3342 0, /* leading underscore */
3343 ' ', /* ar_pad_char */
3344 16, /* ar_max_namelen */
3345 0, /* match priority. */
3346 TARGET_KEEP_UNUSED_SECTION_SYMBOLS
, /* keep unused section symbols. */
3347 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
3348 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
3349 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* data */
3350 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
3351 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
3352 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* hdrs */
3356 mmo_object_p
, /* bfd_check_format */
3361 _bfd_bool_bfd_false_error
,
3363 _bfd_bool_bfd_false_error
,
3364 _bfd_bool_bfd_false_error
,
3366 { /* bfd_write_contents */
3367 _bfd_bool_bfd_false_error
,
3368 mmo_write_object_contents
,
3369 _bfd_bool_bfd_false_error
,
3370 _bfd_bool_bfd_false_error
,
3373 BFD_JUMP_TABLE_GENERIC (mmo
),
3374 BFD_JUMP_TABLE_COPY (mmo
),
3375 BFD_JUMP_TABLE_CORE (_bfd_nocore
),
3376 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive
),
3377 BFD_JUMP_TABLE_SYMBOLS (mmo
),
3378 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs
),
3379 BFD_JUMP_TABLE_WRITE (mmo
),
3380 BFD_JUMP_TABLE_LINK (mmo
),
3381 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),