1/* ECOFF support on Alpha machines.
2   coff/ecoff.h must be included before this file.
3
4   Copyright 2001 Free Software Foundation, Inc.
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program; if not, write to the Free Software
18   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
19
20/********************** FILE HEADER **********************/
21
22struct external_filehdr
23{
24  unsigned char f_magic[2];	/* magic number			*/
25  unsigned char f_nscns[2];	/* number of sections		*/
26  unsigned char f_timdat[4];	/* time & date stamp		*/
27  unsigned char f_symptr[8];	/* file pointer to symtab	*/
28  unsigned char f_nsyms[4];	/* number of symtab entries	*/
29  unsigned char f_opthdr[2];	/* sizeof(optional hdr)		*/
30  unsigned char f_flags[2];	/* flags			*/
31};
32
33/* Magic numbers are defined in coff/ecoff.h.  */
34#define ALPHA_ECOFF_BADMAG(x) \
35  ((x).f_magic != ALPHA_MAGIC && (x).f_magic != ALPHA_MAGIC_BSD)
36
37/* The object type is encoded in the f_flags.  */
38#define F_ALPHA_OBJECT_TYPE_MASK	0x3000
39#define F_ALPHA_NO_SHARED		0x1000
40#define F_ALPHA_SHARABLE		0x2000
41#define F_ALPHA_CALL_SHARED		0x3000
42
43#define	FILHDR	struct external_filehdr
44#define	FILHSZ	24
45
46/********************** AOUT "OPTIONAL HEADER" **********************/
47
48typedef struct external_aouthdr
49{
50  unsigned char magic[2];	/* type of file				*/
51  unsigned char	vstamp[2];	/* version stamp			*/
52  unsigned char bldrev[2];	/* ?? */
53  unsigned char padding[2];	/* pad to quadword boundary		*/
54  unsigned char	tsize[8];	/* text size in bytes			*/
55  unsigned char	dsize[8];	/* initialized data "  "		*/
56  unsigned char	bsize[8];	/* uninitialized data "   "		*/
57  unsigned char	entry[8];	/* entry pt.				*/
58  unsigned char text_start[8];	/* base of text used for this file */
59  unsigned char data_start[8];	/* base of data used for this file */
60  unsigned char bss_start[8];	/* base of bss used for this file */
61  unsigned char gprmask[4];	/* bitmask of general registers used */
62  unsigned char fprmask[4];	/* bitmask of floating point registers used */
63  unsigned char gp_value[8];	/* value for gp register */
64} AOUTHDR;
65
66/* compute size of a header */
67
68#define AOUTSZ 80
69#define AOUTHDRSZ 80
70
71/********************** SECTION HEADER **********************/
72
73struct external_scnhdr
74{
75  unsigned char	s_name[8];	/* section name			*/
76  unsigned char	s_paddr[8];	/* physical address, aliased s_nlib */
77  unsigned char	s_vaddr[8];	/* virtual address		*/
78  unsigned char	s_size[8];	/* section size			*/
79  unsigned char	s_scnptr[8];	/* file ptr to raw data for section */
80  unsigned char	s_relptr[8];	/* file ptr to relocation	*/
81  unsigned char	s_lnnoptr[8];	/* file ptr to line numbers	*/
82  unsigned char	s_nreloc[2];	/* number of relocation entries	*/
83  unsigned char	s_nlnno[2];	/* number of line number entries*/
84  unsigned char	s_flags[4];	/* flags			*/
85};
86
87#define	SCNHDR	struct external_scnhdr
88#define	SCNHSZ	64
89
90/********************** RELOCATION DIRECTIVES **********************/
91
92struct external_reloc
93{
94  unsigned char r_vaddr[8];
95  unsigned char r_symndx[4];
96  unsigned char r_bits[4];
97};
98
99#define RELOC struct external_reloc
100#define RELSZ 16
101
102/* Constants to unpack the r_bits field.  The Alpha seems to always be
103   little endian, so I haven't bothered to define big endian variants
104   of these.  */
105
106#define RELOC_BITS0_TYPE_LITTLE			0xff
107#define RELOC_BITS0_TYPE_SH_LITTLE		0
108
109#define RELOC_BITS1_EXTERN_LITTLE		0x01
110
111#define RELOC_BITS1_OFFSET_LITTLE		0x7e
112#define RELOC_BITS1_OFFSET_SH_LITTLE		1
113
114#define RELOC_BITS1_RESERVED_LITTLE		0x80
115#define RELOC_BITS1_RESERVED_SH_LITTLE		7
116#define RELOC_BITS2_RESERVED_LITTLE		0xff
117#define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE	1
118#define RELOC_BITS3_RESERVED_LITTLE		0x03
119#define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE	9
120
121#define RELOC_BITS3_SIZE_LITTLE			0xfc
122#define RELOC_BITS3_SIZE_SH_LITTLE		2
123
124/* The r_type field in a reloc is one of the following values.  */
125#define ALPHA_R_IGNORE		0
126#define ALPHA_R_REFLONG		1
127#define ALPHA_R_REFQUAD		2
128#define ALPHA_R_GPREL32		3
129#define ALPHA_R_LITERAL		4
130#define ALPHA_R_LITUSE		5
131#define ALPHA_R_GPDISP		6
132#define ALPHA_R_BRADDR		7
133#define ALPHA_R_HINT		8
134#define ALPHA_R_SREL16		9
135#define ALPHA_R_SREL32	       10
136#define ALPHA_R_SREL64	       11
137#define ALPHA_R_OP_PUSH	       12
138#define ALPHA_R_OP_STORE       13
139#define ALPHA_R_OP_PSUB	       14
140#define ALPHA_R_OP_PRSHIFT     15
141#define ALPHA_R_GPVALUE	       16
142#define ALPHA_R_GPRELHIGH      17
143#define ALPHA_R_GPRELLOW       18
144#define ALPHA_R_IMMED          19
145
146/* Overloaded reloc value used by Net- and OpenBSD.  */
147#define ALPHA_R_LITERALSLEAZY  17
148
149/* With ALPHA_R_LITUSE, the r_size field is one of the following values.  */
150#define ALPHA_R_LU_BASE         1
151#define ALPHA_R_LU_BYTOFF       2
152#define ALPHA_R_LU_JSR          3
153
154/* With ALPHA_R_IMMED, the r_size field is one of the following values.  */
155#define ALPHA_R_IMMED_GP_16     1
156#define ALPHA_R_IMMED_GP_HI32   2
157#define ALPHA_R_IMMED_SCN_HI32  3
158#define ALPHA_R_IMMED_BR_HI32   4
159#define ALPHA_R_IMMED_LO32      5
160
161/********************** SYMBOLIC INFORMATION **********************/
162
163/* Written by John Gilmore.  */
164
165/* ECOFF uses COFF-like section structures, but its own symbol format.
166   This file defines the symbol format in fields whose size and alignment
167   will not vary on different host systems.  */
168
169/* File header as a set of bytes */
170
171struct hdr_ext
172{
173	unsigned char 	h_magic[2];
174	unsigned char	h_vstamp[2];
175	unsigned char	h_ilineMax[4];
176	unsigned char	h_idnMax[4];
177	unsigned char	h_ipdMax[4];
178	unsigned char	h_isymMax[4];
179	unsigned char	h_ioptMax[4];
180	unsigned char	h_iauxMax[4];
181	unsigned char	h_issMax[4];
182	unsigned char	h_issExtMax[4];
183	unsigned char	h_ifdMax[4];
184	unsigned char	h_crfd[4];
185	unsigned char	h_iextMax[4];
186	unsigned char	h_cbLine[8];
187	unsigned char	h_cbLineOffset[8];
188	unsigned char	h_cbDnOffset[8];
189	unsigned char	h_cbPdOffset[8];
190	unsigned char	h_cbSymOffset[8];
191	unsigned char	h_cbOptOffset[8];
192	unsigned char	h_cbAuxOffset[8];
193	unsigned char	h_cbSsOffset[8];
194	unsigned char	h_cbSsExtOffset[8];
195	unsigned char	h_cbFdOffset[8];
196	unsigned char	h_cbRfdOffset[8];
197	unsigned char	h_cbExtOffset[8];
198};
199
200/* File descriptor external record */
201
202struct fdr_ext
203{
204	unsigned char	f_adr[8];
205	unsigned char	f_cbLineOffset[8];
206	unsigned char	f_cbLine[8];
207	unsigned char	f_cbSs[8];
208	unsigned char	f_rss[4];
209	unsigned char	f_issBase[4];
210	unsigned char	f_isymBase[4];
211	unsigned char	f_csym[4];
212	unsigned char	f_ilineBase[4];
213	unsigned char	f_cline[4];
214	unsigned char	f_ioptBase[4];
215	unsigned char	f_copt[4];
216	unsigned char	f_ipdFirst[4];
217	unsigned char	f_cpd[4];
218	unsigned char	f_iauxBase[4];
219	unsigned char	f_caux[4];
220	unsigned char	f_rfdBase[4];
221	unsigned char	f_crfd[4];
222	unsigned char	f_bits1[1];
223	unsigned char	f_bits2[3];
224	unsigned char	f_padding[4];
225};
226
227#define	FDR_BITS1_LANG_BIG		0xF8
228#define	FDR_BITS1_LANG_SH_BIG		3
229#define	FDR_BITS1_LANG_LITTLE		0x1F
230#define	FDR_BITS1_LANG_SH_LITTLE	0
231
232#define	FDR_BITS1_FMERGE_BIG		0x04
233#define	FDR_BITS1_FMERGE_LITTLE		0x20
234
235#define	FDR_BITS1_FREADIN_BIG		0x02
236#define	FDR_BITS1_FREADIN_LITTLE	0x40
237
238#define	FDR_BITS1_FBIGENDIAN_BIG	0x01
239#define	FDR_BITS1_FBIGENDIAN_LITTLE	0x80
240
241#define	FDR_BITS2_GLEVEL_BIG		0xC0
242#define	FDR_BITS2_GLEVEL_SH_BIG		6
243#define	FDR_BITS2_GLEVEL_LITTLE		0x03
244#define	FDR_BITS2_GLEVEL_SH_LITTLE	0
245
246/* We ignore the `reserved' field in bits2. */
247
248/* Procedure descriptor external record */
249
250struct pdr_ext {
251	unsigned char	p_adr[8];
252	unsigned char	p_cbLineOffset[8];
253	unsigned char	p_isym[4];
254	unsigned char	p_iline[4];
255	unsigned char	p_regmask[4];
256	unsigned char	p_regoffset[4];
257	unsigned char	p_iopt[4];
258	unsigned char	p_fregmask[4];
259	unsigned char	p_fregoffset[4];
260	unsigned char	p_frameoffset[4];
261	unsigned char	p_lnLow[4];
262	unsigned char	p_lnHigh[4];
263	unsigned char	p_gp_prologue[1];
264	unsigned char	p_bits1[1];
265	unsigned char	p_bits2[1];
266	unsigned char	p_localoff[1];
267	unsigned char	p_framereg[2];
268	unsigned char	p_pcreg[2];
269};
270
271#define PDR_BITS1_GP_USED_BIG		0x80
272#define PDR_BITS1_REG_FRAME_BIG		0x40
273#define PDR_BITS1_PROF_BIG		0x20
274#define PDR_BITS1_RESERVED_BIG		0x1f
275#define PDR_BITS1_RESERVED_SH_LEFT_BIG	8
276#define PDR_BITS2_RESERVED_BIG		0xff
277#define PDR_BITS2_RESERVED_SH_BIG	0
278
279#define PDR_BITS1_GP_USED_LITTLE	0x01
280#define PDR_BITS1_REG_FRAME_LITTLE	0x02
281#define PDR_BITS1_PROF_LITTLE		0x04
282#define PDR_BITS1_RESERVED_LITTLE	0xf8
283#define PDR_BITS1_RESERVED_SH_LITTLE	3
284#define PDR_BITS2_RESERVED_LITTLE	0xff
285#define PDR_BITS2_RESERVED_SH_LEFT_LITTLE 5
286
287/* Line numbers */
288
289struct line_ext {
290	unsigned char	l_line[4];
291};
292
293/* Symbol external record */
294
295struct sym_ext {
296	unsigned char	s_value[8];
297	unsigned char	s_iss[4];
298	unsigned char	s_bits1[1];
299	unsigned char	s_bits2[1];
300	unsigned char	s_bits3[1];
301	unsigned char	s_bits4[1];
302};
303
304#define	SYM_BITS1_ST_BIG		0xFC
305#define	SYM_BITS1_ST_SH_BIG		2
306#define	SYM_BITS1_ST_LITTLE		0x3F
307#define	SYM_BITS1_ST_SH_LITTLE		0
308
309#define	SYM_BITS1_SC_BIG		0x03
310#define	SYM_BITS1_SC_SH_LEFT_BIG	3
311#define	SYM_BITS1_SC_LITTLE		0xC0
312#define	SYM_BITS1_SC_SH_LITTLE		6
313
314#define	SYM_BITS2_SC_BIG		0xE0
315#define	SYM_BITS2_SC_SH_BIG		5
316#define	SYM_BITS2_SC_LITTLE		0x07
317#define	SYM_BITS2_SC_SH_LEFT_LITTLE	2
318
319#define	SYM_BITS2_RESERVED_BIG		0x10
320#define	SYM_BITS2_RESERVED_LITTLE	0x08
321
322#define	SYM_BITS2_INDEX_BIG		0x0F
323#define	SYM_BITS2_INDEX_SH_LEFT_BIG	16
324#define	SYM_BITS2_INDEX_LITTLE		0xF0
325#define	SYM_BITS2_INDEX_SH_LITTLE	4
326
327#define	SYM_BITS3_INDEX_SH_LEFT_BIG	8
328#define	SYM_BITS3_INDEX_SH_LEFT_LITTLE	4
329
330#define	SYM_BITS4_INDEX_SH_LEFT_BIG	0
331#define	SYM_BITS4_INDEX_SH_LEFT_LITTLE	12
332
333/* External symbol external record */
334
335struct ext_ext {
336	struct	sym_ext es_asym;
337	unsigned char	es_bits1[1];
338	unsigned char	es_bits2[3];
339	unsigned char	es_ifd[4];
340};
341
342#define	EXT_BITS1_JMPTBL_BIG		0x80
343#define	EXT_BITS1_JMPTBL_LITTLE		0x01
344
345#define	EXT_BITS1_COBOL_MAIN_BIG	0x40
346#define	EXT_BITS1_COBOL_MAIN_LITTLE	0x02
347
348#define	EXT_BITS1_WEAKEXT_BIG		0x20
349#define	EXT_BITS1_WEAKEXT_LITTLE	0x04
350
351/* Dense numbers external record */
352
353struct dnr_ext {
354	unsigned char	d_rfd[4];
355	unsigned char	d_index[4];
356};
357
358/* Relative file descriptor */
359
360struct rfd_ext {
361  unsigned char	rfd[4];
362};
363
364/* Optimizer symbol external record */
365
366struct opt_ext {
367  unsigned char o_bits1[1];
368  unsigned char o_bits2[1];
369  unsigned char o_bits3[1];
370  unsigned char o_bits4[1];
371  struct rndx_ext o_rndx;
372  unsigned char o_offset[4];
373};
374
375#define OPT_BITS2_VALUE_SH_LEFT_BIG	16
376#define OPT_BITS2_VALUE_SH_LEFT_LITTLE	0
377
378#define OPT_BITS3_VALUE_SH_LEFT_BIG	8
379#define OPT_BITS3_VALUE_SH_LEFT_LITTLE	8
380
381#define OPT_BITS4_VALUE_SH_LEFT_BIG	0
382#define OPT_BITS4_VALUE_SH_LEFT_LITTLE	16
383