1/* ECOFF support on Alpha machines.
2   coff/ecoff.h must be included before this file.
3
4   Copyright 2001, 2005 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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#define ALPHA_ECOFF_COMPRESSEDMAG(x) \
38  ((x).f_magic == ALPHA_MAGIC_COMPRESSED)
39
40/* The object type is encoded in the f_flags.  */
41#define F_ALPHA_OBJECT_TYPE_MASK	0x3000
42#define F_ALPHA_NO_SHARED		0x1000
43#define F_ALPHA_SHARABLE		0x2000
44#define F_ALPHA_CALL_SHARED		0x3000
45
46#define	FILHDR	struct external_filehdr
47#define	FILHSZ	24
48
49/********************** AOUT "OPTIONAL HEADER" **********************/
50
51typedef struct external_aouthdr
52{
53  unsigned char magic[2];	/* type of file				*/
54  unsigned char	vstamp[2];	/* version stamp			*/
55  unsigned char bldrev[2];	/* ?? */
56  unsigned char padding[2];	/* pad to quadword boundary		*/
57  unsigned char	tsize[8];	/* text size in bytes			*/
58  unsigned char	dsize[8];	/* initialized data "  "		*/
59  unsigned char	bsize[8];	/* uninitialized data "   "		*/
60  unsigned char	entry[8];	/* entry pt.				*/
61  unsigned char text_start[8];	/* base of text used for this file */
62  unsigned char data_start[8];	/* base of data used for this file */
63  unsigned char bss_start[8];	/* base of bss used for this file */
64  unsigned char gprmask[4];	/* bitmask of general registers used */
65  unsigned char fprmask[4];	/* bitmask of floating point registers used */
66  unsigned char gp_value[8];	/* value for gp register */
67} AOUTHDR;
68
69/* compute size of a header */
70
71#define AOUTSZ 80
72#define AOUTHDRSZ 80
73
74/********************** SECTION HEADER **********************/
75
76struct external_scnhdr
77{
78  unsigned char	s_name[8];	/* section name			*/
79  unsigned char	s_paddr[8];	/* physical address, aliased s_nlib */
80  unsigned char	s_vaddr[8];	/* virtual address		*/
81  unsigned char	s_size[8];	/* section size			*/
82  unsigned char	s_scnptr[8];	/* file ptr to raw data for section */
83  unsigned char	s_relptr[8];	/* file ptr to relocation	*/
84  unsigned char	s_lnnoptr[8];	/* file ptr to line numbers	*/
85  unsigned char	s_nreloc[2];	/* number of relocation entries	*/
86  unsigned char	s_nlnno[2];	/* number of line number entries*/
87  unsigned char	s_flags[4];	/* flags			*/
88};
89
90#define	SCNHDR	struct external_scnhdr
91#define	SCNHSZ	64
92
93/********************** RELOCATION DIRECTIVES **********************/
94
95struct external_reloc
96{
97  unsigned char r_vaddr[8];
98  unsigned char r_symndx[4];
99  unsigned char r_bits[4];
100};
101
102#define RELOC struct external_reloc
103#define RELSZ 16
104
105/* Constants to unpack the r_bits field.  The Alpha seems to always be
106   little endian, so I haven't bothered to define big endian variants
107   of these.  */
108
109#define RELOC_BITS0_TYPE_LITTLE			0xff
110#define RELOC_BITS0_TYPE_SH_LITTLE		0
111
112#define RELOC_BITS1_EXTERN_LITTLE		0x01
113
114#define RELOC_BITS1_OFFSET_LITTLE		0x7e
115#define RELOC_BITS1_OFFSET_SH_LITTLE		1
116
117#define RELOC_BITS1_RESERVED_LITTLE		0x80
118#define RELOC_BITS1_RESERVED_SH_LITTLE		7
119#define RELOC_BITS2_RESERVED_LITTLE		0xff
120#define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE	1
121#define RELOC_BITS3_RESERVED_LITTLE		0x03
122#define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE	9
123
124#define RELOC_BITS3_SIZE_LITTLE			0xfc
125#define RELOC_BITS3_SIZE_SH_LITTLE		2
126
127/* The r_type field in a reloc is one of the following values.  */
128#define ALPHA_R_IGNORE		0
129#define ALPHA_R_REFLONG		1
130#define ALPHA_R_REFQUAD		2
131#define ALPHA_R_GPREL32		3
132#define ALPHA_R_LITERAL		4
133#define ALPHA_R_LITUSE		5
134#define ALPHA_R_GPDISP		6
135#define ALPHA_R_BRADDR		7
136#define ALPHA_R_HINT		8
137#define ALPHA_R_SREL16		9
138#define ALPHA_R_SREL32	       10
139#define ALPHA_R_SREL64	       11
140#define ALPHA_R_OP_PUSH	       12
141#define ALPHA_R_OP_STORE       13
142#define ALPHA_R_OP_PSUB	       14
143#define ALPHA_R_OP_PRSHIFT     15
144#define ALPHA_R_GPVALUE	       16
145#define ALPHA_R_GPRELHIGH      17
146#define ALPHA_R_GPRELLOW       18
147#define ALPHA_R_IMMED          19
148
149/* Overloaded reloc value used by Net- and OpenBSD.  */
150#define ALPHA_R_LITERALSLEAZY  17
151
152/* With ALPHA_R_LITUSE, the r_size field is one of the following values.  */
153#define ALPHA_R_LU_BASE         1
154#define ALPHA_R_LU_BYTOFF       2
155#define ALPHA_R_LU_JSR          3
156
157/* With ALPHA_R_IMMED, the r_size field is one of the following values.  */
158#define ALPHA_R_IMMED_GP_16     1
159#define ALPHA_R_IMMED_GP_HI32   2
160#define ALPHA_R_IMMED_SCN_HI32  3
161#define ALPHA_R_IMMED_BR_HI32   4
162#define ALPHA_R_IMMED_LO32      5
163
164/********************** SYMBOLIC INFORMATION **********************/
165
166/* Written by John Gilmore.  */
167
168/* ECOFF uses COFF-like section structures, but its own symbol format.
169   This file defines the symbol format in fields whose size and alignment
170   will not vary on different host systems.  */
171
172/* File header as a set of bytes */
173
174struct hdr_ext
175{
176	unsigned char 	h_magic[2];
177	unsigned char	h_vstamp[2];
178	unsigned char	h_ilineMax[4];
179	unsigned char	h_idnMax[4];
180	unsigned char	h_ipdMax[4];
181	unsigned char	h_isymMax[4];
182	unsigned char	h_ioptMax[4];
183	unsigned char	h_iauxMax[4];
184	unsigned char	h_issMax[4];
185	unsigned char	h_issExtMax[4];
186	unsigned char	h_ifdMax[4];
187	unsigned char	h_crfd[4];
188	unsigned char	h_iextMax[4];
189	unsigned char	h_cbLine[8];
190	unsigned char	h_cbLineOffset[8];
191	unsigned char	h_cbDnOffset[8];
192	unsigned char	h_cbPdOffset[8];
193	unsigned char	h_cbSymOffset[8];
194	unsigned char	h_cbOptOffset[8];
195	unsigned char	h_cbAuxOffset[8];
196	unsigned char	h_cbSsOffset[8];
197	unsigned char	h_cbSsExtOffset[8];
198	unsigned char	h_cbFdOffset[8];
199	unsigned char	h_cbRfdOffset[8];
200	unsigned char	h_cbExtOffset[8];
201};
202
203/* File descriptor external record */
204
205struct fdr_ext
206{
207	unsigned char	f_adr[8];
208	unsigned char	f_cbLineOffset[8];
209	unsigned char	f_cbLine[8];
210	unsigned char	f_cbSs[8];
211	unsigned char	f_rss[4];
212	unsigned char	f_issBase[4];
213	unsigned char	f_isymBase[4];
214	unsigned char	f_csym[4];
215	unsigned char	f_ilineBase[4];
216	unsigned char	f_cline[4];
217	unsigned char	f_ioptBase[4];
218	unsigned char	f_copt[4];
219	unsigned char	f_ipdFirst[4];
220	unsigned char	f_cpd[4];
221	unsigned char	f_iauxBase[4];
222	unsigned char	f_caux[4];
223	unsigned char	f_rfdBase[4];
224	unsigned char	f_crfd[4];
225	unsigned char	f_bits1[1];
226	unsigned char	f_bits2[3];
227	unsigned char	f_padding[4];
228};
229
230#define	FDR_BITS1_LANG_BIG		0xF8
231#define	FDR_BITS1_LANG_SH_BIG		3
232#define	FDR_BITS1_LANG_LITTLE		0x1F
233#define	FDR_BITS1_LANG_SH_LITTLE	0
234
235#define	FDR_BITS1_FMERGE_BIG		0x04
236#define	FDR_BITS1_FMERGE_LITTLE		0x20
237
238#define	FDR_BITS1_FREADIN_BIG		0x02
239#define	FDR_BITS1_FREADIN_LITTLE	0x40
240
241#define	FDR_BITS1_FBIGENDIAN_BIG	0x01
242#define	FDR_BITS1_FBIGENDIAN_LITTLE	0x80
243
244#define	FDR_BITS2_GLEVEL_BIG		0xC0
245#define	FDR_BITS2_GLEVEL_SH_BIG		6
246#define	FDR_BITS2_GLEVEL_LITTLE		0x03
247#define	FDR_BITS2_GLEVEL_SH_LITTLE	0
248
249/* We ignore the `reserved' field in bits2. */
250
251/* Procedure descriptor external record */
252
253struct pdr_ext {
254	unsigned char	p_adr[8];
255	unsigned char	p_cbLineOffset[8];
256	unsigned char	p_isym[4];
257	unsigned char	p_iline[4];
258	unsigned char	p_regmask[4];
259	unsigned char	p_regoffset[4];
260	unsigned char	p_iopt[4];
261	unsigned char	p_fregmask[4];
262	unsigned char	p_fregoffset[4];
263	unsigned char	p_frameoffset[4];
264	unsigned char	p_lnLow[4];
265	unsigned char	p_lnHigh[4];
266	unsigned char	p_gp_prologue[1];
267	unsigned char	p_bits1[1];
268	unsigned char	p_bits2[1];
269	unsigned char	p_localoff[1];
270	unsigned char	p_framereg[2];
271	unsigned char	p_pcreg[2];
272};
273
274#define PDR_BITS1_GP_USED_BIG		0x80
275#define PDR_BITS1_REG_FRAME_BIG		0x40
276#define PDR_BITS1_PROF_BIG		0x20
277#define PDR_BITS1_RESERVED_BIG		0x1f
278#define PDR_BITS1_RESERVED_SH_LEFT_BIG	8
279#define PDR_BITS2_RESERVED_BIG		0xff
280#define PDR_BITS2_RESERVED_SH_BIG	0
281
282#define PDR_BITS1_GP_USED_LITTLE	0x01
283#define PDR_BITS1_REG_FRAME_LITTLE	0x02
284#define PDR_BITS1_PROF_LITTLE		0x04
285#define PDR_BITS1_RESERVED_LITTLE	0xf8
286#define PDR_BITS1_RESERVED_SH_LITTLE	3
287#define PDR_BITS2_RESERVED_LITTLE	0xff
288#define PDR_BITS2_RESERVED_SH_LEFT_LITTLE 5
289
290/* Line numbers */
291
292struct line_ext {
293	unsigned char	l_line[4];
294};
295
296/* Symbol external record */
297
298struct sym_ext {
299	unsigned char	s_value[8];
300	unsigned char	s_iss[4];
301	unsigned char	s_bits1[1];
302	unsigned char	s_bits2[1];
303	unsigned char	s_bits3[1];
304	unsigned char	s_bits4[1];
305};
306
307#define	SYM_BITS1_ST_BIG		0xFC
308#define	SYM_BITS1_ST_SH_BIG		2
309#define	SYM_BITS1_ST_LITTLE		0x3F
310#define	SYM_BITS1_ST_SH_LITTLE		0
311
312#define	SYM_BITS1_SC_BIG		0x03
313#define	SYM_BITS1_SC_SH_LEFT_BIG	3
314#define	SYM_BITS1_SC_LITTLE		0xC0
315#define	SYM_BITS1_SC_SH_LITTLE		6
316
317#define	SYM_BITS2_SC_BIG		0xE0
318#define	SYM_BITS2_SC_SH_BIG		5
319#define	SYM_BITS2_SC_LITTLE		0x07
320#define	SYM_BITS2_SC_SH_LEFT_LITTLE	2
321
322#define	SYM_BITS2_RESERVED_BIG		0x10
323#define	SYM_BITS2_RESERVED_LITTLE	0x08
324
325#define	SYM_BITS2_INDEX_BIG		0x0F
326#define	SYM_BITS2_INDEX_SH_LEFT_BIG	16
327#define	SYM_BITS2_INDEX_LITTLE		0xF0
328#define	SYM_BITS2_INDEX_SH_LITTLE	4
329
330#define	SYM_BITS3_INDEX_SH_LEFT_BIG	8
331#define	SYM_BITS3_INDEX_SH_LEFT_LITTLE	4
332
333#define	SYM_BITS4_INDEX_SH_LEFT_BIG	0
334#define	SYM_BITS4_INDEX_SH_LEFT_LITTLE	12
335
336/* External symbol external record */
337
338struct ext_ext {
339	struct	sym_ext es_asym;
340	unsigned char	es_bits1[1];
341	unsigned char	es_bits2[3];
342	unsigned char	es_ifd[4];
343};
344
345#define	EXT_BITS1_JMPTBL_BIG		0x80
346#define	EXT_BITS1_JMPTBL_LITTLE		0x01
347
348#define	EXT_BITS1_COBOL_MAIN_BIG	0x40
349#define	EXT_BITS1_COBOL_MAIN_LITTLE	0x02
350
351#define	EXT_BITS1_WEAKEXT_BIG		0x20
352#define	EXT_BITS1_WEAKEXT_LITTLE	0x04
353
354/* Dense numbers external record */
355
356struct dnr_ext {
357	unsigned char	d_rfd[4];
358	unsigned char	d_index[4];
359};
360
361/* Relative file descriptor */
362
363struct rfd_ext {
364  unsigned char	rfd[4];
365};
366
367/* Optimizer symbol external record */
368
369struct opt_ext {
370  unsigned char o_bits1[1];
371  unsigned char o_bits2[1];
372  unsigned char o_bits3[1];
373  unsigned char o_bits4[1];
374  struct rndx_ext o_rndx;
375  unsigned char o_offset[4];
376};
377
378#define OPT_BITS2_VALUE_SH_LEFT_BIG	16
379#define OPT_BITS2_VALUE_SH_LEFT_LITTLE	0
380
381#define OPT_BITS3_VALUE_SH_LEFT_BIG	8
382#define OPT_BITS3_VALUE_SH_LEFT_LITTLE	8
383
384#define OPT_BITS4_VALUE_SH_LEFT_BIG	0
385#define OPT_BITS4_VALUE_SH_LEFT_LITTLE	16
386