1 /* COFF information for TI COFF support. Definitions in this file should be
2 customized in a target-specific file, and then this file included (see
3 tic54x.h for an example).
5 Copyright 2000, 2001, 2002, 2003, 2008 Free Software Foundation, Inc.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23 /* Note "coff/external.h is not used because TI adds extra fields to the structures. */
25 /********************** FILE HEADER **********************/
27 struct external_filehdr
29 char f_magic
[2]; /* magic number */
30 char f_nscns
[2]; /* number of sections */
31 char f_timdat
[4]; /* time & date stamp */
32 char f_symptr
[4]; /* file pointer to symtab */
33 char f_nsyms
[4]; /* number of symtab entries */
34 char f_opthdr
[2]; /* sizeof(optional hdr) */
35 char f_flags
[2]; /* flags */
36 char f_target_id
[2]; /* magic no. (TI COFF-specific) */
39 /* COFF0 has magic number in f_magic, and omits f_target_id from the file
40 header; for later versions, f_magic is 0xC1 for COFF1 and 0xC2 for COFF2
41 and the target-specific magic number is found in f_target_id */
43 #define TICOFF0MAGIC TI_TARGET_ID
44 #define TICOFF1MAGIC 0x00C1
45 #define TICOFF2MAGIC 0x00C2
46 #define TICOFF_AOUT_MAGIC 0x0108 /* magic number in optional header */
47 #define TICOFF 1 /* customize coffcode.h */
49 /* The target_id field changes depending on the particular CPU target */
50 /* for COFF0, the target id appeared in f_magic, where COFFX magic is now */
52 #error "TI_TARGET_ID needs to be defined for your CPU"
55 /* Which bfd_arch to use... */
56 #ifndef TICOFF_TARGET_ARCH
57 #error "TICOFF_TARGET_ARCH needs to be defined for your CPU"
60 #ifndef TICOFF_TARGET_MACHINE_GET
61 #define TICOFF_TARGET_MACHINE_GET(FLAGS) 0
64 #ifndef TICOFF_TARGET_MACHINE_SET
65 #define TICOFF_TARGET_MACHINE_SET(FLAGSP, MACHINE)
68 /* Default to COFF2 for file output */
69 #ifndef TICOFF_DEFAULT_MAGIC
70 #define TICOFF_DEFAULT_MAGIC TICOFF2MAGIC
73 /* This value is made available in the rare case where a bfd is unavailable */
74 #ifndef OCTETS_PER_BYTE_POWER
75 #error "OCTETS_PER_BYTE_POWER not defined for this CPU"
77 #define OCTETS_PER_BYTE (1<<OCTETS_PER_BYTE_POWER)
80 /* default alignment is on a byte (not octet!) boundary */
81 #ifndef COFF_DEFAULT_SECTION_ALIGNMENT_POWER
82 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
85 /* TI COFF encodes the section alignment in the section header flags */
86 #define COFF_ALIGN_IN_SECTION_HEADER 1
87 #define COFF_ALIGN_IN_S_FLAGS 1
88 /* requires a power-of-two argument */
89 #define COFF_ENCODE_ALIGNMENT(S,X) ((S).s_flags |= (((unsigned)(X)&0xF)<<8))
90 /* result is a power of two */
91 #define COFF_DECODE_ALIGNMENT(X) (((X)>>8)&0xF)
93 #define COFF0_P(ABFD) (bfd_coff_filhsz(ABFD) == FILHSZ_V0)
94 #define COFF2_P(ABFD) (bfd_coff_scnhsz(ABFD) != SCNHSZ_V01)
96 #define COFF0_BADMAG(x) ((x).f_magic != TICOFF0MAGIC)
97 #define COFF1_BADMAG(x) ((x).f_magic != TICOFF1MAGIC || (x).f_target_id != TI_TARGET_ID)
98 #define COFF2_BADMAG(x) ((x).f_magic != TICOFF2MAGIC || (x).f_target_id != TI_TARGET_ID)
100 /* we need to read/write an extra field in the coff file header */
101 #ifndef COFF_ADJUST_FILEHDR_IN_POST
102 #define COFF_ADJUST_FILEHDR_IN_POST(abfd, src, dst) \
105 ((struct internal_filehdr *)(dst))->f_target_id = \
106 H_GET_16 (abfd, ((FILHDR *)(src))->f_target_id); \
111 #ifndef COFF_ADJUST_FILEHDR_OUT_POST
112 #define COFF_ADJUST_FILEHDR_OUT_POST(abfd, src, dst) \
115 H_PUT_16 (abfd, ((struct internal_filehdr *)(src))->f_target_id, \
116 ((FILHDR *)(dst))->f_target_id); \
121 #define FILHDR struct external_filehdr
123 #define FILHSZ_V0 20 /* COFF0 omits target_id field */
125 /* File header flags */
126 #define F_RELFLG (0x0001)
127 #define F_EXEC (0x0002)
128 #define F_LNNO (0x0004)
129 #define F_VERS (0x0010) /* TMS320C4x code */
130 /* F_LSYMS needs to be redefined in your source file */
131 #define F_LSYMS_TICOFF (0x0010) /* normal COFF is 0x8 */
133 #define F_10 0x00 /* file built for TMS320C1x devices */
134 #define F_20 0x10 /* file built for TMS320C2x devices */
135 #define F_25 0x20 /* file built for TMS320C2x/C5x devices */
136 #define F_LENDIAN 0x0100 /* 16 bits/word, LSB first */
137 #define F_SYMMERGE 0x1000 /* duplicate symbols were removed */
139 /********************** OPTIONAL HEADER **********************/
144 char magic
[2]; /* type of file (0x108) */
145 char vstamp
[2]; /* version stamp */
146 char tsize
[4]; /* text size in bytes, padded to FW bdry*/
147 char dsize
[4]; /* initialized data " " */
148 char bsize
[4]; /* uninitialized data " " */
149 char entry
[4]; /* entry pt. */
150 char text_start
[4]; /* base of text used for this file */
151 char data_start
[4]; /* base of data used for this file */
160 /********************** SECTION HEADER **********************/
162 struct external_scnhdr_v01
{
163 char s_name
[8]; /* section name */
164 char s_paddr
[4]; /* physical address, aliased s_nlib */
165 char s_vaddr
[4]; /* virtual address */
166 char s_size
[4]; /* section size (in WORDS) */
167 char s_scnptr
[4]; /* file ptr to raw data for section */
168 char s_relptr
[4]; /* file ptr to relocation */
169 char s_lnnoptr
[4]; /* file ptr to line numbers */
170 char s_nreloc
[2]; /* number of relocation entries */
171 char s_nlnno
[2]; /* number of line number entries*/
172 char s_flags
[2]; /* flags */
173 char s_reserved
[1]; /* reserved */
174 char s_page
[1]; /* section page number (LOAD) */
178 struct external_scnhdr
{
179 char s_name
[8]; /* section name */
180 char s_paddr
[4]; /* physical address, aliased s_nlib */
181 char s_vaddr
[4]; /* virtual address */
182 char s_size
[4]; /* section size (in WORDS) */
183 char s_scnptr
[4]; /* file ptr to raw data for section */
184 char s_relptr
[4]; /* file ptr to relocation */
185 char s_lnnoptr
[4]; /* file ptr to line numbers */
186 char s_nreloc
[4]; /* number of relocation entries */
187 char s_nlnno
[4]; /* number of line number entries*/
188 char s_flags
[4]; /* flags */
189 char s_reserved
[2]; /* reserved */
190 char s_page
[2]; /* section page number (LOAD) */
194 * Special section flags
197 /* TI COFF defines these flags;
198 STYP_CLINK: the section should be excluded from the final
199 linker output if there are no references found to any symbol in the section
200 STYP_BLOCK: the section should be blocked, i.e. if the section would cross
201 a page boundary, it is started at a page boundary instead.
202 TI COFF puts the section alignment power of two in the section flags
203 e.g. 2**N is alignment, flags |= (N & 0xF) << 8
205 #define STYP_CLINK (0x4000)
206 #define STYP_BLOCK (0x1000)
207 #define STYP_ALIGN (0x0F00) /* TI COFF stores section alignment here */
209 #define SCNHDR_V01 struct external_scnhdr_v01
210 #define SCNHDR struct external_scnhdr
211 #define SCNHSZ_V01 40 /* for v0 and v1 */
214 /* COFF2 changes the offsets and sizes of these fields
215 Assume we're dealing with the COFF2 scnhdr structure, and adjust
216 accordingly. Note: The GNU C versions of some of these macros
217 are necessary in order to avoid compile time warnings triggered
218 gcc's array bounds checking. The PUT_SCNHDR_PAGE macro also has
219 the advantage on not evaluating LOC twice. */
221 #define GET_SCNHDR_NRELOC(ABFD, LOC) \
222 (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, LOC))
223 #define PUT_SCNHDR_NRELOC(ABFD, VAL, LOC) \
224 (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, LOC))
226 #define GET_SCNHDR_NLNNO(ABFD, LOC) \
229 char * ptr = (LOC); \
230 if (COFF2_P (ABFD)) \
231 nlnno = H_GET_32 (ABFD, ptr); \
233 nlnno = H_GET_16 (ABFD, ptr - 2); \
236 #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
239 char * ptr = (LOC); \
240 if (COFF2_P (ABFD)) \
241 H_PUT_32 (ABFD, VAL, ptr); \
243 H_PUT_16 (ABFD, VAL, ptr - 2); \
246 #define GET_SCNHDR_FLAGS(ABFD, LOC) \
249 char * ptr = (LOC); \
250 if (COFF2_P (ABFD)) \
251 flags = H_GET_32 (ABFD, ptr); \
253 flags = H_GET_16 (ABFD, ptr - 4); \
256 #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
259 char * ptr = (LOC); \
260 if (COFF2_P (ABFD)) \
261 H_PUT_32 (ABFD, VAL, ptr); \
263 H_PUT_16 (ABFD, VAL, ptr - 4); \
266 #define GET_SCNHDR_PAGE(ABFD, LOC) \
269 char * ptr = (LOC); \
270 if (COFF2_P (ABFD)) \
271 page = H_GET_16 (ABFD, ptr); \
273 page = (unsigned) H_GET_8 (ABFD, ptr - 7); \
276 /* On output, make sure that the "reserved" field is zero. */
277 #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
280 char * ptr = (LOC); \
281 if (COFF2_P (ABFD)) \
282 H_PUT_16 (ABFD, VAL, ptr); \
285 H_PUT_8 (ABFD, VAL, ptr - 7); \
286 H_PUT_8 (ABFD, 0, ptr - 8); \
291 #define GET_SCNHDR_NLNNO(ABFD, LOC) \
292 (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 2))
293 #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
294 (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 2))
295 #define GET_SCNHDR_FLAGS(ABFD, LOC) \
296 (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 4))
297 #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
298 (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 4))
299 #define GET_SCNHDR_PAGE(ABFD, LOC) \
300 (COFF2_P (ABFD) ? H_GET_16 (ABFD, LOC) : (unsigned) H_GET_8 (ABFD, (LOC) - 7))
301 /* On output, make sure that the "reserved" field is zero. */
302 #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
304 ? H_PUT_16 (ABFD, VAL, LOC) \
305 : H_PUT_8 (ABFD, VAL, (LOC) - 7), H_PUT_8 (ABFD, 0, (LOC) - 8))
309 /* TI COFF stores section size as number of bytes (address units, not octets),
310 so adjust to be number of octets, which is what BFD expects */
311 #define GET_SCNHDR_SIZE(ABFD, SZP) \
312 (H_GET_32 (ABFD, SZP) * bfd_octets_per_byte (ABFD))
313 #define PUT_SCNHDR_SIZE(ABFD, SZ, SZP) \
314 H_PUT_32 (ABFD, (SZ) / bfd_octets_per_byte (ABFD), SZP)
316 #define COFF_ADJUST_SCNHDR_IN_POST(ABFD, EXT, INT) \
319 ((struct internal_scnhdr *)(INT))->s_page = \
320 GET_SCNHDR_PAGE (ABFD, ((SCNHDR *)(EXT))->s_page); \
324 /* The line number and reloc overflow checking in coff_swap_scnhdr_out in
325 coffswap.h doesn't use PUT_X for s_nlnno and s_nreloc.
326 Due to different sized v0/v1/v2 section headers, we have to re-write these
329 #define COFF_ADJUST_SCNHDR_OUT_POST(ABFD, INT, EXT) \
332 PUT_SCNHDR_NLNNO (ABFD, ((struct internal_scnhdr *)(INT))->s_nlnno, \
333 ((SCNHDR *)(EXT))->s_nlnno); \
334 PUT_SCNHDR_NRELOC (ABFD, ((struct internal_scnhdr *)(INT))->s_nreloc,\
335 ((SCNHDR *)(EXT))->s_nreloc); \
336 PUT_SCNHDR_FLAGS (ABFD, ((struct internal_scnhdr *)(INT))->s_flags, \
337 ((SCNHDR *)(EXT))->s_flags); \
338 PUT_SCNHDR_PAGE (ABFD, ((struct internal_scnhdr *)(INT))->s_page, \
339 ((SCNHDR *)(EXT))->s_page); \
344 * names of "special" sections
346 #define _TEXT ".text"
347 #define _DATA ".data"
349 #define _CINIT ".cinit" /* initialized C data */
350 #define _SCONST ".const" /* constants */
351 #define _SWITCH ".switch" /* switch tables */
352 #define _STACK ".stack" /* C stack */
353 #define _SYSMEM ".sysmem" /* used for malloc et al. syscalls */
355 /********************** LINE NUMBERS **********************/
357 /* 1 line number entry for every "breakpointable" source line in a section.
358 * Line numbers are grouped on a per function basis; first entry in a function
359 * grouping will have l_lnno = 0 and in place of physical address will be the
360 * symbol table index of the function name.
362 struct external_lineno
{
364 char l_symndx
[4]; /* function name symbol index, iff l_lnno == 0*/
365 char l_paddr
[4]; /* (physical) address of line number */
367 char l_lnno
[2]; /* line number */
370 #define LINENO struct external_lineno
374 /********************** SYMBOLS **********************/
376 /* NOTE: this is what a local label looks like in assembly source; what it
377 looks like in COFF output is undefined */
378 #define TICOFF_LOCAL_LABEL_P(NAME) \
379 ((NAME[0] == '$' && NAME[1] >= '0' && NAME[1] <= '9' && NAME[2] == '\0') \
380 || NAME[strlen(NAME)-1] == '?')
382 #define E_SYMNMLEN 8 /* # characters in a symbol name */
383 #define E_FILNMLEN 14 /* # characters in a file name */
384 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
386 struct external_syment
389 char e_name
[E_SYMNMLEN
];
403 #define N_BTMASK (017)
404 #define N_TMASK (060)
409 union external_auxent
{
411 char x_tagndx
[4]; /* str, un, or enum tag indx */
414 char x_lnno
[2]; /* declaration line number */
415 char x_size
[2]; /* str/union/array size */
417 char x_fsize
[4]; /* size of function */
420 struct { /* if ISFCN, tag, or .bb */
421 char x_lnnoptr
[4]; /* ptr to fcn line # */
422 char x_endndx
[4]; /* entry ndx past block end */
424 struct { /* if ISARY, up to 4 dimen. */
425 char x_dimen
[E_DIMNUM
][2];
428 char x_tvndx
[2]; /* tv index */
432 char x_fname
[E_FILNMLEN
];
440 char x_scnlen
[4]; /* section length */
441 char x_nreloc
[2]; /* # relocation entries */
442 char x_nlinno
[2]; /* # line numbers */
446 char x_tvfill
[4]; /* tv fill value */
447 char x_tvlen
[2]; /* length of .tv */
448 char x_tvran
[2][2]; /* tv range */
449 } x_tv
; /* info about .tv section (in auxent of symbol .tv)) */
454 #define SYMENT struct external_syment
456 #define AUXENT union external_auxent
459 /* section lengths are in target bytes (not host bytes) */
460 #define GET_SCN_SCNLEN(ABFD, EXT) \
461 (H_GET_32 (ABFD, (EXT)->x_scn.x_scnlen) * bfd_octets_per_byte (ABFD))
462 #define PUT_SCN_SCNLEN(ABFD, INT, EXT) \
463 H_PUT_32 (ABFD, (INT) / bfd_octets_per_byte (ABFD), (EXT)->x_scn.x_scnlen)
465 /* lnsz size is in bits in COFF file, in bytes in BFD */
466 #define GET_LNSZ_SIZE(abfd, ext) \
467 (H_GET_16 (abfd, ext->x_sym.x_misc.x_lnsz.x_size) / (class != C_FIELD ? 8 : 1))
469 #define PUT_LNSZ_SIZE(abfd, in, ext) \
470 H_PUT_16 (abfd, ((class != C_FIELD) ? (in) * 8 : (in)), \
471 ext->x_sym.x_misc.x_lnsz.x_size)
473 /* TI COFF stores offsets for MOS and MOU in bits; BFD expects bytes
474 Also put the load page flag of the section into the symbol value if it's an
477 #define NEEDS_PAGE(X) 0
480 #define COFF_ADJUST_SYM_IN_POST(ABFD, EXT, INT) \
483 struct internal_syment *dst = (struct internal_syment *)(INT); \
484 if (dst->n_sclass == C_MOS || dst->n_sclass == C_MOU) \
486 else if (NEEDS_PAGE (dst->n_sclass)) { \
487 asection *scn = coff_section_from_bfd_index (abfd, dst->n_scnum); \
488 dst->n_value |= (scn->lma & PAGE_MASK); \
493 #define COFF_ADJUST_SYM_OUT_POST(ABFD, INT, EXT) \
496 struct internal_syment *src = (struct internal_syment *)(INT); \
497 SYMENT *dst = (SYMENT *)(EXT); \
498 if (src->n_sclass == C_MOU || src->n_sclass == C_MOS) \
499 H_PUT_32 (abfd, src->n_value * 8, dst->e_value); \
500 else if (NEEDS_PAGE (src->n_sclass)) { \
501 H_PUT_32 (abfd, src->n_value &= ~PAGE_MASK, dst->e_value); \
506 /* Detect section-relative absolute symbols so they get flagged with a sym
509 #define SECTION_RELATIVE_ABSOLUTE_SYMBOL_P(RELOC, SECT) \
510 ((*(RELOC)->sym_ptr_ptr)->section->output_section == (SECT) \
511 && (RELOC)->howto->name[0] == 'A')
513 /********************** RELOCATION DIRECTIVES **********************/
515 struct external_reloc_v0
523 struct external_reloc
527 char r_reserved
[2]; /* extended pmad byte for COFF2 */
531 #define RELOC struct external_reloc
532 #define RELSZ_V0 10 /* FIXME -- coffcode.h needs fixing */
533 #define RELSZ 12 /* for COFF1/2 */
535 /* various relocation types. */
536 #define R_ABS 0x0000 /* no relocation */
537 #define R_REL13 0x002A /* 13-bit direct reference (???) */
538 #define R_PARTLS7 0x0028 /* 7 LSBs of an address */
539 #define R_PARTMS9 0x0029 /* 9MSBs of an address */
540 #define R_EXTWORD 0x002B /* 23-bit direct reference */
541 #define R_EXTWORD16 0x002C /* 16-bit direct reference to 23-bit addr*/
542 #define R_EXTWORDMS7 0x002D /* upper 7 bits of 23-bit address */
544 #endif /* COFF_TI_H */
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