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, 2005, 2008, 2009, 2010
6 Free Software Foundation, Inc.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
26 /* Note "coff/external.h is not used because TI adds extra fields to the structures. */
28 /********************** FILE HEADER **********************/
30 struct external_filehdr
32 char f_magic
[2]; /* magic number */
33 char f_nscns
[2]; /* number of sections */
34 char f_timdat
[4]; /* time & date stamp */
35 char f_symptr
[4]; /* file pointer to symtab */
36 char f_nsyms
[4]; /* number of symtab entries */
37 char f_opthdr
[2]; /* sizeof(optional hdr) */
38 char f_flags
[2]; /* flags */
39 char f_target_id
[2]; /* magic no. (TI COFF-specific) */
42 /* COFF0 has magic number in f_magic, and omits f_target_id from the file
43 header; for later versions, f_magic is 0xC1 for COFF1 and 0xC2 for COFF2
44 and the target-specific magic number is found in f_target_id */
46 #define TICOFF0MAGIC TI_TARGET_ID
47 #define TICOFF1MAGIC 0x00C1
48 #define TICOFF2MAGIC 0x00C2
49 #define TICOFF_AOUT_MAGIC 0x0108 /* magic number in optional header */
50 #define TICOFF 1 /* customize coffcode.h */
52 /* The target_id field changes depending on the particular CPU target */
53 /* for COFF0, the target id appeared in f_magic, where COFFX magic is now */
55 #error "TI_TARGET_ID needs to be defined for your CPU"
58 /* Which bfd_arch to use... */
59 #ifndef TICOFF_TARGET_ARCH
60 #error "TICOFF_TARGET_ARCH needs to be defined for your CPU"
63 #ifndef TICOFF_TARGET_MACHINE_GET
64 #define TICOFF_TARGET_MACHINE_GET(FLAGS) 0
67 #ifndef TICOFF_TARGET_MACHINE_SET
68 #define TICOFF_TARGET_MACHINE_SET(FLAGSP, MACHINE)
71 /* Default to COFF2 for file output */
72 #ifndef TICOFF_DEFAULT_MAGIC
73 #define TICOFF_DEFAULT_MAGIC TICOFF2MAGIC
76 /* This value is made available in the rare case where a bfd is unavailable */
77 #ifndef OCTETS_PER_BYTE_POWER
78 #error "OCTETS_PER_BYTE_POWER not defined for this CPU"
80 #define OCTETS_PER_BYTE (1<<OCTETS_PER_BYTE_POWER)
83 /* default alignment is on a byte (not octet!) boundary */
84 #ifndef COFF_DEFAULT_SECTION_ALIGNMENT_POWER
85 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
88 /* TI COFF encodes the section alignment in the section header flags */
89 #define COFF_ALIGN_IN_SECTION_HEADER 1
90 #define COFF_ALIGN_IN_S_FLAGS 1
91 /* requires a power-of-two argument */
92 #define COFF_ENCODE_ALIGNMENT(S,X) ((S).s_flags |= (((unsigned)(X)&0xF)<<8))
93 /* result is a power of two */
94 #define COFF_DECODE_ALIGNMENT(X) (((X)>>8)&0xF)
96 #define COFF0_P(ABFD) (bfd_coff_filhsz(ABFD) == FILHSZ_V0)
97 #define COFF2_P(ABFD) (bfd_coff_scnhsz(ABFD) != SCNHSZ_V01)
99 #define COFF0_BADMAG(x) ((x).f_magic != TICOFF0MAGIC)
100 #define COFF1_BADMAG(x) ((x).f_magic != TICOFF1MAGIC || (x).f_target_id != TI_TARGET_ID)
101 #define COFF2_BADMAG(x) ((x).f_magic != TICOFF2MAGIC || (x).f_target_id != TI_TARGET_ID)
103 /* we need to read/write an extra field in the coff file header */
104 #ifndef COFF_ADJUST_FILEHDR_IN_POST
105 #define COFF_ADJUST_FILEHDR_IN_POST(abfd, src, dst) \
108 if (!COFF0_P (abfd)) \
109 ((struct internal_filehdr *)(dst))->f_target_id = \
110 H_GET_16 (abfd, ((FILHDR *)(src))->f_target_id); \
115 #ifndef COFF_ADJUST_FILEHDR_OUT_POST
116 #define COFF_ADJUST_FILEHDR_OUT_POST(abfd, src, dst) \
119 if (!COFF0_P (abfd)) \
120 H_PUT_16 (abfd, ((struct internal_filehdr *)(src))->f_target_id, \
121 ((FILHDR *)(dst))->f_target_id); \
126 #define FILHDR struct external_filehdr
128 #define FILHSZ_V0 20 /* COFF0 omits target_id field */
130 /* File header flags */
131 #define F_RELFLG (0x0001)
132 #define F_EXEC (0x0002)
133 #define F_LNNO (0x0004)
134 #define F_VERS (0x0010) /* TMS320C4x code */
135 /* F_LSYMS needs to be redefined in your source file */
136 #define F_LSYMS_TICOFF (0x0010) /* normal COFF is 0x8 */
138 #define F_10 0x00 /* file built for TMS320C1x devices */
139 #define F_20 0x10 /* file built for TMS320C2x devices */
140 #define F_25 0x20 /* file built for TMS320C2x/C5x devices */
141 #define F_LENDIAN 0x0100 /* 16 bits/word, LSB first */
142 #define F_SYMMERGE 0x1000 /* duplicate symbols were removed */
144 /********************** OPTIONAL HEADER **********************/
149 char magic
[2]; /* type of file (0x108) */
150 char vstamp
[2]; /* version stamp */
151 char tsize
[4]; /* text size in bytes, padded to FW bdry*/
152 char dsize
[4]; /* initialized data " " */
153 char bsize
[4]; /* uninitialized data " " */
154 char entry
[4]; /* entry pt. */
155 char text_start
[4]; /* base of text used for this file */
156 char data_start
[4]; /* base of data used for this file */
165 /********************** SECTION HEADER **********************/
167 struct external_scnhdr_v01
{
168 char s_name
[8]; /* section name */
169 char s_paddr
[4]; /* physical address, aliased s_nlib */
170 char s_vaddr
[4]; /* virtual address */
171 char s_size
[4]; /* section size (in WORDS) */
172 char s_scnptr
[4]; /* file ptr to raw data for section */
173 char s_relptr
[4]; /* file ptr to relocation */
174 char s_lnnoptr
[4]; /* file ptr to line numbers */
175 char s_nreloc
[2]; /* number of relocation entries */
176 char s_nlnno
[2]; /* number of line number entries*/
177 char s_flags
[2]; /* flags */
178 char s_reserved
[1]; /* reserved */
179 char s_page
[1]; /* section page number (LOAD) */
183 struct external_scnhdr
{
184 char s_name
[8]; /* section name */
185 char s_paddr
[4]; /* physical address, aliased s_nlib */
186 char s_vaddr
[4]; /* virtual address */
187 char s_size
[4]; /* section size (in WORDS) */
188 char s_scnptr
[4]; /* file ptr to raw data for section */
189 char s_relptr
[4]; /* file ptr to relocation */
190 char s_lnnoptr
[4]; /* file ptr to line numbers */
191 char s_nreloc
[4]; /* number of relocation entries */
192 char s_nlnno
[4]; /* number of line number entries*/
193 char s_flags
[4]; /* flags */
194 char s_reserved
[2]; /* reserved */
195 char s_page
[2]; /* section page number (LOAD) */
199 * Special section flags
202 /* TI COFF defines these flags;
203 STYP_CLINK: the section should be excluded from the final
204 linker output if there are no references found to any symbol in the section
205 STYP_BLOCK: the section should be blocked, i.e. if the section would cross
206 a page boundary, it is started at a page boundary instead.
207 TI COFF puts the section alignment power of two in the section flags
208 e.g. 2**N is alignment, flags |= (N & 0xF) << 8
210 #define STYP_CLINK (0x4000)
211 #define STYP_BLOCK (0x1000)
212 #define STYP_ALIGN (0x0F00) /* TI COFF stores section alignment here */
214 #define SCNHDR_V01 struct external_scnhdr_v01
215 #define SCNHDR struct external_scnhdr
216 #define SCNHSZ_V01 40 /* for v0 and v1 */
219 /* COFF2 changes the offsets and sizes of these fields
220 Assume we're dealing with the COFF2 scnhdr structure, and adjust
221 accordingly. Note: The GNU C versions of some of these macros
222 are necessary in order to avoid compile time warnings triggered
223 gcc's array bounds checking. The PUT_SCNHDR_PAGE macro also has
224 the advantage on not evaluating LOC twice. */
226 #define GET_SCNHDR_NRELOC(ABFD, LOC) \
227 (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, LOC))
228 #define PUT_SCNHDR_NRELOC(ABFD, VAL, LOC) \
229 (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, LOC))
231 #define GET_SCNHDR_NLNNO(ABFD, LOC) \
234 char * ptr = (LOC); \
235 if (COFF2_P (ABFD)) \
236 nlnno = H_GET_32 (ABFD, ptr); \
238 nlnno = H_GET_16 (ABFD, ptr - 2); \
241 #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
244 char * ptr = (LOC); \
245 if (COFF2_P (ABFD)) \
246 H_PUT_32 (ABFD, VAL, ptr); \
248 H_PUT_16 (ABFD, VAL, ptr - 2); \
251 #define GET_SCNHDR_FLAGS(ABFD, LOC) \
254 char * ptr = (LOC); \
255 if (COFF2_P (ABFD)) \
256 flags = H_GET_32 (ABFD, ptr); \
258 flags = H_GET_16 (ABFD, ptr - 4); \
261 #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
264 char * ptr = (LOC); \
265 if (COFF2_P (ABFD)) \
266 H_PUT_32 (ABFD, VAL, ptr); \
268 H_PUT_16 (ABFD, VAL, ptr - 4); \
271 #define GET_SCNHDR_PAGE(ABFD, LOC) \
274 char * ptr = (LOC); \
275 if (COFF2_P (ABFD)) \
276 page = H_GET_16 (ABFD, ptr); \
278 page = (unsigned) H_GET_8 (ABFD, ptr - 7); \
281 /* On output, make sure that the "reserved" field is zero. */
282 #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
285 char * ptr = (LOC); \
286 if (COFF2_P (ABFD)) \
287 H_PUT_16 (ABFD, VAL, ptr); \
290 H_PUT_8 (ABFD, VAL, ptr - 7); \
291 H_PUT_8 (ABFD, 0, ptr - 8); \
296 #define GET_SCNHDR_NLNNO(ABFD, LOC) \
297 (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 2))
298 #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
299 (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 2))
300 #define GET_SCNHDR_FLAGS(ABFD, LOC) \
301 (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 4))
302 #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
303 (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 4))
304 #define GET_SCNHDR_PAGE(ABFD, LOC) \
305 (COFF2_P (ABFD) ? H_GET_16 (ABFD, LOC) : (unsigned) H_GET_8 (ABFD, (LOC) - 7))
306 /* On output, make sure that the "reserved" field is zero. */
307 #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
309 ? H_PUT_16 (ABFD, VAL, LOC) \
310 : H_PUT_8 (ABFD, VAL, (LOC) - 7), H_PUT_8 (ABFD, 0, (LOC) - 8))
314 /* TI COFF stores section size as number of bytes (address units, not octets),
315 so adjust to be number of octets, which is what BFD expects */
316 #define GET_SCNHDR_SIZE(ABFD, SZP) \
317 (H_GET_32 (ABFD, SZP) * bfd_octets_per_byte (ABFD))
318 #define PUT_SCNHDR_SIZE(ABFD, SZ, SZP) \
319 H_PUT_32 (ABFD, (SZ) / bfd_octets_per_byte (ABFD), SZP)
321 #define COFF_ADJUST_SCNHDR_IN_POST(ABFD, EXT, INT) \
324 ((struct internal_scnhdr *)(INT))->s_page = \
325 GET_SCNHDR_PAGE (ABFD, ((SCNHDR *)(EXT))->s_page); \
329 /* The entire scnhdr may not be assigned.
330 Ensure that everything is initialized. */
331 #define COFF_ADJUST_SCNHDR_OUT_PRE(ABFD, INT, EXT) \
334 memset((EXT), 0, sizeof (SCNHDR)); \
338 /* The line number and reloc overflow checking in coff_swap_scnhdr_out in
339 coffswap.h doesn't use PUT_X for s_nlnno and s_nreloc.
340 Due to different sized v0/v1/v2 section headers, we have to re-write these
343 #define COFF_ADJUST_SCNHDR_OUT_POST(ABFD, INT, EXT) \
346 PUT_SCNHDR_NLNNO (ABFD, ((struct internal_scnhdr *)(INT))->s_nlnno, \
347 ((SCNHDR *)(EXT))->s_nlnno); \
348 PUT_SCNHDR_NRELOC (ABFD, ((struct internal_scnhdr *)(INT))->s_nreloc,\
349 ((SCNHDR *)(EXT))->s_nreloc); \
350 PUT_SCNHDR_FLAGS (ABFD, ((struct internal_scnhdr *)(INT))->s_flags, \
351 ((SCNHDR *)(EXT))->s_flags); \
352 PUT_SCNHDR_PAGE (ABFD, ((struct internal_scnhdr *)(INT))->s_page, \
353 ((SCNHDR *)(EXT))->s_page); \
358 * names of "special" sections
360 #define _TEXT ".text"
361 #define _DATA ".data"
363 #define _CINIT ".cinit" /* initialized C data */
364 #define _SCONST ".const" /* constants */
365 #define _SWITCH ".switch" /* switch tables */
366 #define _STACK ".stack" /* C stack */
367 #define _SYSMEM ".sysmem" /* used for malloc et al. syscalls */
369 /********************** LINE NUMBERS **********************/
371 /* 1 line number entry for every "breakpointable" source line in a section.
372 * Line numbers are grouped on a per function basis; first entry in a function
373 * grouping will have l_lnno = 0 and in place of physical address will be the
374 * symbol table index of the function name.
376 struct external_lineno
{
378 char l_symndx
[4]; /* function name symbol index, iff l_lnno == 0*/
379 char l_paddr
[4]; /* (physical) address of line number */
381 char l_lnno
[2]; /* line number */
384 #define LINENO struct external_lineno
388 /********************** SYMBOLS **********************/
390 /* NOTE: this is what a local label looks like in assembly source; what it
391 looks like in COFF output is undefined */
392 #define TICOFF_LOCAL_LABEL_P(NAME) \
393 ((NAME[0] == '$' && NAME[1] >= '0' && NAME[1] <= '9' && NAME[2] == '\0') \
394 || NAME[strlen(NAME)-1] == '?')
396 #define E_SYMNMLEN 8 /* # characters in a symbol name */
397 #define E_FILNMLEN 14 /* # characters in a file name */
398 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
400 struct external_syment
403 char e_name
[E_SYMNMLEN
];
417 #define N_BTMASK (017)
418 #define N_TMASK (060)
423 union external_auxent
{
425 char x_tagndx
[4]; /* str, un, or enum tag indx */
428 char x_lnno
[2]; /* declaration line number */
429 char x_size
[2]; /* str/union/array size */
431 char x_fsize
[4]; /* size of function */
434 struct { /* if ISFCN, tag, or .bb */
435 char x_lnnoptr
[4]; /* ptr to fcn line # */
436 char x_endndx
[4]; /* entry ndx past block end */
438 struct { /* if ISARY, up to 4 dimen. */
439 char x_dimen
[E_DIMNUM
][2];
442 char x_tvndx
[2]; /* tv index */
446 char x_fname
[E_FILNMLEN
];
454 char x_scnlen
[4]; /* section length */
455 char x_nreloc
[2]; /* # relocation entries */
456 char x_nlinno
[2]; /* # line numbers */
460 char x_tvfill
[4]; /* tv fill value */
461 char x_tvlen
[2]; /* length of .tv */
462 char x_tvran
[2][2]; /* tv range */
463 } x_tv
; /* info about .tv section (in auxent of symbol .tv)) */
468 #define SYMENT struct external_syment
470 #define AUXENT union external_auxent
473 /* section lengths are in target bytes (not host bytes) */
474 #define GET_SCN_SCNLEN(ABFD, EXT) \
475 (H_GET_32 (ABFD, (EXT)->x_scn.x_scnlen) * bfd_octets_per_byte (ABFD))
476 #define PUT_SCN_SCNLEN(ABFD, INT, EXT) \
477 H_PUT_32 (ABFD, (INT) / bfd_octets_per_byte (ABFD), (EXT)->x_scn.x_scnlen)
479 /* lnsz size is in bits in COFF file, in bytes in BFD */
480 #define GET_LNSZ_SIZE(abfd, ext) \
481 (H_GET_16 (abfd, ext->x_sym.x_misc.x_lnsz.x_size) / (in_class != C_FIELD ? 8 : 1))
483 #define PUT_LNSZ_SIZE(abfd, in, ext) \
484 H_PUT_16 (abfd, ((in_class != C_FIELD) ? (in) * 8 : (in)), \
485 ext->x_sym.x_misc.x_lnsz.x_size)
487 /* TI COFF stores offsets for MOS and MOU in bits; BFD expects bytes
488 Also put the load page flag of the section into the symbol value if it's an
491 #define NEEDS_PAGE(X) 0
494 #define COFF_ADJUST_SYM_IN_POST(ABFD, EXT, INT) \
497 struct internal_syment *dst = (struct internal_syment *)(INT); \
498 if (dst->n_sclass == C_MOS || dst->n_sclass == C_MOU) \
500 else if (NEEDS_PAGE (dst->n_sclass)) { \
501 asection *scn = coff_section_from_bfd_index (abfd, dst->n_scnum); \
502 dst->n_value |= (scn->lma & PAGE_MASK); \
507 #define COFF_ADJUST_SYM_OUT_POST(ABFD, INT, EXT) \
510 struct internal_syment *src = (struct internal_syment *)(INT); \
511 SYMENT *dst = (SYMENT *)(EXT); \
512 if (src->n_sclass == C_MOU || src->n_sclass == C_MOS) \
513 H_PUT_32 (abfd, src->n_value * 8, dst->e_value); \
514 else if (NEEDS_PAGE (src->n_sclass)) { \
515 H_PUT_32 (abfd, src->n_value &= ~PAGE_MASK, dst->e_value); \
520 /* Detect section-relative absolute symbols so they get flagged with a sym
523 #define SECTION_RELATIVE_ABSOLUTE_SYMBOL_P(RELOC, SECT) \
524 ((*(RELOC)->sym_ptr_ptr)->section->output_section == (SECT) \
525 && (RELOC)->howto->name[0] == 'A')
527 /********************** RELOCATION DIRECTIVES **********************/
529 struct external_reloc_v0
537 struct external_reloc
541 char r_reserved
[2]; /* extended pmad byte for COFF2 */
545 #define RELOC struct external_reloc
546 #define RELSZ_V0 10 /* FIXME -- coffcode.h needs fixing */
547 #define RELSZ 12 /* for COFF1/2 */
549 /* various relocation types. */
550 #define R_ABS 0x0000 /* no relocation */
551 #define R_REL13 0x002A /* 13-bit direct reference (???) */
552 #define R_PARTLS7 0x0028 /* 7 LSBs of an address */
553 #define R_PARTMS9 0x0029 /* 9MSBs of an address */
554 #define R_EXTWORD 0x002B /* 23-bit direct reference */
555 #define R_EXTWORD16 0x002C /* 16-bit direct reference to 23-bit addr*/
556 #define R_EXTWORDMS7 0x002D /* upper 7 bits of 23-bit address */
558 #endif /* COFF_TI_H */
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