1/* ECOFF support on Alpha machines.
2   coff/ecoff.h must be included before this file.
3
4   Copyright (C) 2001-2017 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 3 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,
19   MA 02110-1301, USA.  */
20
21/********************** FILE HEADER **********************/
22
23struct external_filehdr
24{
25  unsigned char f_magic[2];	/* magic number			*/
26  unsigned char f_nscns[2];	/* number of sections		*/
27  unsigned char f_timdat[4];	/* time & date stamp		*/
28  unsigned char f_symptr[8];	/* file pointer to symtab	*/
29  unsigned char f_nsyms[4];	/* number of symtab entries	*/
30  unsigned char f_opthdr[2];	/* sizeof(optional hdr)		*/
31  unsigned char f_flags[2];	/* flags			*/
32};
33
34/* Magic numbers are defined in coff/ecoff.h.  */
35#define ALPHA_ECOFF_BADMAG(x) \
36  ((x).f_magic != ALPHA_MAGIC && (x).f_magic != ALPHA_MAGIC_BSD)
37
38#define ALPHA_ECOFF_COMPRESSEDMAG(x) \
39  ((x).f_magic == ALPHA_MAGIC_COMPRESSED)
40
41/* The object type is encoded in the f_flags.  */
42#define F_ALPHA_OBJECT_TYPE_MASK	0x3000
43#define F_ALPHA_NO_SHARED		0x1000
44#define F_ALPHA_SHARABLE		0x2000
45#define F_ALPHA_CALL_SHARED		0x3000
46
47#define	FILHDR	struct external_filehdr
48#define	FILHSZ	24
49
50/********************** AOUT "OPTIONAL HEADER" **********************/
51
52typedef struct external_aouthdr
53{
54  unsigned char magic[2];	/* type of file				*/
55  unsigned char	vstamp[2];	/* version stamp			*/
56  unsigned char bldrev[2];	/* ?? */
57  unsigned char padding[2];	/* pad to quadword boundary		*/
58  unsigned char	tsize[8];	/* text size in bytes			*/
59  unsigned char	dsize[8];	/* initialized data "  "		*/
60  unsigned char	bsize[8];	/* uninitialized data "   "		*/
61  unsigned char	entry[8];	/* entry pt.				*/
62  unsigned char text_start[8];	/* base of text used for this file */
63  unsigned char data_start[8];	/* base of data used for this file */
64  unsigned char bss_start[8];	/* base of bss used for this file */
65  unsigned char gprmask[4];	/* bitmask of general registers used */
66  unsigned char fprmask[4];	/* bitmask of floating point registers used */
67  unsigned char gp_value[8];	/* value for gp register */
68} AOUTHDR;
69
70/* compute size of a header */
71
72#define AOUTSZ 80
73#define AOUTHDRSZ 80
74
75/********************** SECTION HEADER **********************/
76
77struct external_scnhdr
78{
79  unsigned char	s_name[8];	/* section name			*/
80  unsigned char	s_paddr[8];	/* physical address, aliased s_nlib */
81  unsigned char	s_vaddr[8];	/* virtual address		*/
82  unsigned char	s_size[8];	/* section size			*/
83  unsigned char	s_scnptr[8];	/* file ptr to raw data for section */
84  unsigned char	s_relptr[8];	/* file ptr to relocation	*/
85  unsigned char	s_lnnoptr[8];	/* file ptr to line numbers	*/
86  unsigned char	s_nreloc[2];	/* number of relocation entries	*/
87  unsigned char	s_nlnno[2];	/* number of line number entries*/
88  unsigned char	s_flags[4];	/* flags			*/
89};
90
91#define	SCNHDR	struct external_scnhdr
92#define	SCNHSZ	64
93
94/********************** RELOCATION DIRECTIVES **********************/
95
96struct external_reloc
97{
98  unsigned char r_vaddr[8];
99  unsigned char r_symndx[4];
100  unsigned char r_bits[4];
101};
102
103#define RELOC struct external_reloc
104#define RELSZ 16
105
106/* Constants to unpack the r_bits field.  The Alpha seems to always be
107   little endian, so I haven't bothered to define big endian variants
108   of these.  */
109
110#define RELOC_BITS0_TYPE_LITTLE			0xff
111#define RELOC_BITS0_TYPE_SH_LITTLE		0
112
113#define RELOC_BITS1_EXTERN_LITTLE		0x01
114
115#define RELOC_BITS1_OFFSET_LITTLE		0x7e
116#define RELOC_BITS1_OFFSET_SH_LITTLE		1
117
118#define RELOC_BITS1_RESERVED_LITTLE		0x80
119#define RELOC_BITS1_RESERVED_SH_LITTLE		7
120#define RELOC_BITS2_RESERVED_LITTLE		0xff
121#define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE	1
122#define RELOC_BITS3_RESERVED_LITTLE		0x03
123#define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE	9
124
125#define RELOC_BITS3_SIZE_LITTLE			0xfc
126#define RELOC_BITS3_SIZE_SH_LITTLE		2
127
128/* The r_type field in a reloc is one of the following values.  */
129#define ALPHA_R_IGNORE		0
130#define ALPHA_R_REFLONG		1
131#define ALPHA_R_REFQUAD		2
132#define ALPHA_R_GPREL32		3
133#define ALPHA_R_LITERAL		4
134#define ALPHA_R_LITUSE		5
135#define ALPHA_R_GPDISP		6
136#define ALPHA_R_BRADDR		7
137#define ALPHA_R_HINT		8
138#define ALPHA_R_SREL16		9
139#define ALPHA_R_SREL32	       10
140#define ALPHA_R_SREL64	       11
141#define ALPHA_R_OP_PUSH	       12
142#define ALPHA_R_OP_STORE       13
143#define ALPHA_R_OP_PSUB	       14
144#define ALPHA_R_OP_PRSHIFT     15
145#define ALPHA_R_GPVALUE	       16
146#define ALPHA_R_GPRELHIGH      17
147#define ALPHA_R_GPRELLOW       18
148#define ALPHA_R_IMMED          19
149
150/* Overloaded reloc value used by Net- and OpenBSD.  */
151#define ALPHA_R_LITERALSLEAZY  17
152
153/* With ALPHA_R_LITUSE, the r_size field is one of the following values.  */
154#define ALPHA_R_LU_BASE         1
155#define ALPHA_R_LU_BYTOFF       2
156#define ALPHA_R_LU_JSR          3
157
158/* With ALPHA_R_IMMED, the r_size field is one of the following values.  */
159#define ALPHA_R_IMMED_GP_16     1
160#define ALPHA_R_IMMED_GP_HI32   2
161#define ALPHA_R_IMMED_SCN_HI32  3
162#define ALPHA_R_IMMED_BR_HI32   4
163#define ALPHA_R_IMMED_LO32      5
164
165/********************** SYMBOLIC INFORMATION **********************/
166
167/* Written by John Gilmore.  */
168
169/* ECOFF uses COFF-like section structures, but its own symbol format.
170   This file defines the symbol format in fields whose size and alignment
171   will not vary on different host systems.  */
172
173/* File header as a set of bytes */
174
175struct hdr_ext
176{
177	unsigned char 	h_magic[2];
178	unsigned char	h_vstamp[2];
179	unsigned char	h_ilineMax[4];
180	unsigned char	h_idnMax[4];
181	unsigned char	h_ipdMax[4];
182	unsigned char	h_isymMax[4];
183	unsigned char	h_ioptMax[4];
184	unsigned char	h_iauxMax[4];
185	unsigned char	h_issMax[4];
186	unsigned char	h_issExtMax[4];
187	unsigned char	h_ifdMax[4];
188	unsigned char	h_crfd[4];
189	unsigned char	h_iextMax[4];
190	unsigned char	h_cbLine[8];
191	unsigned char	h_cbLineOffset[8];
192	unsigned char	h_cbDnOffset[8];
193	unsigned char	h_cbPdOffset[8];
194	unsigned char	h_cbSymOffset[8];
195	unsigned char	h_cbOptOffset[8];
196	unsigned char	h_cbAuxOffset[8];
197	unsigned char	h_cbSsOffset[8];
198	unsigned char	h_cbSsExtOffset[8];
199	unsigned char	h_cbFdOffset[8];
200	unsigned char	h_cbRfdOffset[8];
201	unsigned char	h_cbExtOffset[8];
202};
203
204/* File descriptor external record */
205
206struct fdr_ext
207{
208	unsigned char	f_adr[8];
209	unsigned char	f_cbLineOffset[8];
210	unsigned char	f_cbLine[8];
211	unsigned char	f_cbSs[8];
212	unsigned char	f_rss[4];
213	unsigned char	f_issBase[4];
214	unsigned char	f_isymBase[4];
215	unsigned char	f_csym[4];
216	unsigned char	f_ilineBase[4];
217	unsigned char	f_cline[4];
218	unsigned char	f_ioptBase[4];
219	unsigned char	f_copt[4];
220	unsigned char	f_ipdFirst[4];
221	unsigned char	f_cpd[4];
222	unsigned char	f_iauxBase[4];
223	unsigned char	f_caux[4];
224	unsigned char	f_rfdBase[4];
225	unsigned char	f_crfd[4];
226	unsigned char	f_bits1[1];
227	unsigned char	f_bits2[3];
228	unsigned char	f_padding[4];
229};
230
231#define	FDR_BITS1_LANG_BIG		0xF8
232#define	FDR_BITS1_LANG_SH_BIG		3
233#define	FDR_BITS1_LANG_LITTLE		0x1F
234#define	FDR_BITS1_LANG_SH_LITTLE	0
235
236#define	FDR_BITS1_FMERGE_BIG		0x04
237#define	FDR_BITS1_FMERGE_LITTLE		0x20
238
239#define	FDR_BITS1_FREADIN_BIG		0x02
240#define	FDR_BITS1_FREADIN_LITTLE	0x40
241
242#define	FDR_BITS1_FBIGENDIAN_BIG	0x01
243#define	FDR_BITS1_FBIGENDIAN_LITTLE	0x80
244
245#define	FDR_BITS2_GLEVEL_BIG		0xC0
246#define	FDR_BITS2_GLEVEL_SH_BIG		6
247#define	FDR_BITS2_GLEVEL_LITTLE		0x03
248#define	FDR_BITS2_GLEVEL_SH_LITTLE	0
249
250/* We ignore the `reserved' field in bits2. */
251
252/* Procedure descriptor external record */
253
254struct pdr_ext {
255	unsigned char	p_adr[8];
256	unsigned char	p_cbLineOffset[8];
257	unsigned char	p_isym[4];
258	unsigned char	p_iline[4];
259	unsigned char	p_regmask[4];
260	unsigned char	p_regoffset[4];
261	unsigned char	p_iopt[4];
262	unsigned char	p_fregmask[4];
263	unsigned char	p_fregoffset[4];
264	unsigned char	p_frameoffset[4];
265	unsigned char	p_lnLow[4];
266	unsigned char	p_lnHigh[4];
267	unsigned char	p_gp_prologue[1];
268	unsigned char	p_bits1[1];
269	unsigned char	p_bits2[1];
270	unsigned char	p_localoff[1];
271	unsigned char	p_framereg[2];
272	unsigned char	p_pcreg[2];
273};
274
275#define PDR_BITS1_GP_USED_BIG		0x80
276#define PDR_BITS1_REG_FRAME_BIG		0x40
277#define PDR_BITS1_PROF_BIG		0x20
278#define PDR_BITS1_RESERVED_BIG		0x1f
279#define PDR_BITS1_RESERVED_SH_LEFT_BIG	8
280#define PDR_BITS2_RESERVED_BIG		0xff
281#define PDR_BITS2_RESERVED_SH_BIG	0
282
283#define PDR_BITS1_GP_USED_LITTLE	0x01
284#define PDR_BITS1_REG_FRAME_LITTLE	0x02
285#define PDR_BITS1_PROF_LITTLE		0x04
286#define PDR_BITS1_RESERVED_LITTLE	0xf8
287#define PDR_BITS1_RESERVED_SH_LITTLE	3
288#define PDR_BITS2_RESERVED_LITTLE	0xff
289#define PDR_BITS2_RESERVED_SH_LEFT_LITTLE 5
290
291/* Line numbers */
292
293struct line_ext {
294	unsigned char	l_line[4];
295};
296
297/* Symbol external record */
298
299struct sym_ext {
300	unsigned char	s_value[8];
301	unsigned char	s_iss[4];
302	unsigned char	s_bits1[1];
303	unsigned char	s_bits2[1];
304	unsigned char	s_bits3[1];
305	unsigned char	s_bits4[1];
306};
307
308#define	SYM_BITS1_ST_BIG		0xFC
309#define	SYM_BITS1_ST_SH_BIG		2
310#define	SYM_BITS1_ST_LITTLE		0x3F
311#define	SYM_BITS1_ST_SH_LITTLE		0
312
313#define	SYM_BITS1_SC_BIG		0x03
314#define	SYM_BITS1_SC_SH_LEFT_BIG	3
315#define	SYM_BITS1_SC_LITTLE		0xC0
316#define	SYM_BITS1_SC_SH_LITTLE		6
317
318#define	SYM_BITS2_SC_BIG		0xE0
319#define	SYM_BITS2_SC_SH_BIG		5
320#define	SYM_BITS2_SC_LITTLE		0x07
321#define	SYM_BITS2_SC_SH_LEFT_LITTLE	2
322
323#define	SYM_BITS2_RESERVED_BIG		0x10
324#define	SYM_BITS2_RESERVED_LITTLE	0x08
325
326#define	SYM_BITS2_INDEX_BIG		0x0F
327#define	SYM_BITS2_INDEX_SH_LEFT_BIG	16
328#define	SYM_BITS2_INDEX_LITTLE		0xF0
329#define	SYM_BITS2_INDEX_SH_LITTLE	4
330
331#define	SYM_BITS3_INDEX_SH_LEFT_BIG	8
332#define	SYM_BITS3_INDEX_SH_LEFT_LITTLE	4
333
334#define	SYM_BITS4_INDEX_SH_LEFT_BIG	0
335#define	SYM_BITS4_INDEX_SH_LEFT_LITTLE	12
336
337/* External symbol external record */
338
339struct ext_ext {
340	struct	sym_ext es_asym;
341	unsigned char	es_bits1[1];
342	unsigned char	es_bits2[3];
343	unsigned char	es_ifd[4];
344};
345
346#define	EXT_BITS1_JMPTBL_BIG		0x80
347#define	EXT_BITS1_JMPTBL_LITTLE		0x01
348
349#define	EXT_BITS1_COBOL_MAIN_BIG	0x40
350#define	EXT_BITS1_COBOL_MAIN_LITTLE	0x02
351
352#define	EXT_BITS1_WEAKEXT_BIG		0x20
353#define	EXT_BITS1_WEAKEXT_LITTLE	0x04
354
355/* Dense numbers external record */
356
357struct dnr_ext {
358	unsigned char	d_rfd[4];
359	unsigned char	d_index[4];
360};
361
362/* Relative file descriptor */
363
364struct rfd_ext {
365  unsigned char	rfd[4];
366};
367
368/* Optimizer symbol external record */
369
370struct opt_ext {
371  unsigned char o_bits1[1];
372  unsigned char o_bits2[1];
373  unsigned char o_bits3[1];
374  unsigned char o_bits4[1];
375  struct rndx_ext o_rndx;
376  unsigned char o_offset[4];
377};
378
379#define OPT_BITS2_VALUE_SH_LEFT_BIG	16
380#define OPT_BITS2_VALUE_SH_LEFT_LITTLE	0
381
382#define OPT_BITS3_VALUE_SH_LEFT_BIG	8
383#define OPT_BITS3_VALUE_SH_LEFT_LITTLE	8
384
385#define OPT_BITS4_VALUE_SH_LEFT_BIG	0
386#define OPT_BITS4_VALUE_SH_LEFT_LITTLE	16
387