Annotation of src/external/gpl3/binutils.old/dist/include/coff/mips.h, Revision 1.1.1.1.2.1
1.1 christos 1: /* ECOFF support on MIPS machines.
2: coff/ecoff.h must be included before this file.
3:
1.1.1.1.2.1! pgoyette 4: Copyright (C) 1999-2015 Free Software Foundation, Inc.
1.1 christos 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: #define DO_NOT_DEFINE_AOUTHDR
22: #define L_LNNO_SIZE 4
23: #include "coff/external.h"
24:
25: /* Magic numbers are defined in coff/ecoff.h. */
26: #define MIPS_ECOFF_BADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \
27: ((x).f_magic!=MIPS_MAGIC_LITTLE) &&\
28: ((x).f_magic!=MIPS_MAGIC_BIG) && \
29: ((x).f_magic!=MIPS_MAGIC_LITTLE2) && \
30: ((x).f_magic!=MIPS_MAGIC_BIG2) && \
31: ((x).f_magic!=MIPS_MAGIC_LITTLE3) && \
32: ((x).f_magic!=MIPS_MAGIC_BIG3))
33:
34:
35: /********************** AOUT "OPTIONAL HEADER" **********************/
36:
37: typedef struct external_aouthdr
38: {
39: unsigned char magic[2]; /* type of file */
40: unsigned char vstamp[2]; /* version stamp */
41: unsigned char tsize[4]; /* text size in bytes, padded to FW bdry*/
42: unsigned char dsize[4]; /* initialized data " " */
43: unsigned char bsize[4]; /* uninitialized data " " */
44: unsigned char entry[4]; /* entry pt. */
45: unsigned char text_start[4]; /* base of text used for this file */
46: unsigned char data_start[4]; /* base of data used for this file */
47: unsigned char bss_start[4]; /* base of bss used for this file */
48: unsigned char gprmask[4]; /* ?? */
49: unsigned char cprmask[4][4]; /* ?? */
50: unsigned char gp_value[4]; /* value for gp register */
51: } AOUTHDR;
52:
53: /* compute size of a header */
54:
55: #define AOUTSZ 56
56: #define AOUTHDRSZ 56
57:
58: /********************** RELOCATION DIRECTIVES **********************/
59:
60: struct external_reloc
61: {
62: unsigned char r_vaddr[4];
63: unsigned char r_bits[4];
64: };
65:
66: #define RELOC struct external_reloc
67: #define RELSZ 8
68:
69: /* MIPS ECOFF uses a packed 8 byte format for relocs. These constants
70: are used to unpack the r_bits field. */
71:
72: #define RELOC_BITS0_SYMNDX_SH_LEFT_BIG 16
73: #define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE 0
74:
75: #define RELOC_BITS1_SYMNDX_SH_LEFT_BIG 8
76: #define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE 8
77:
78: #define RELOC_BITS2_SYMNDX_SH_LEFT_BIG 0
79: #define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE 16
80:
81: /* Originally, ECOFF used four bits for the reloc type and had three
82: reserved bits. Irix 4 added another bit for the reloc type, which
83: was easy because it was big endian and one of the spare bits became
84: the new most significant bit. To make this also work for little
85: endian ECOFF, we need to wrap one of the reserved bits around to
86: become the most significant bit of the reloc type. */
87: #define RELOC_BITS3_TYPE_BIG 0x3E
88: #define RELOC_BITS3_TYPE_SH_BIG 1
89: #define RELOC_BITS3_TYPE_LITTLE 0x78
90: #define RELOC_BITS3_TYPE_SH_LITTLE 3
91: #define RELOC_BITS3_TYPEHI_LITTLE 0x04
92: #define RELOC_BITS3_TYPEHI_SH_LITTLE 2
93:
94: #define RELOC_BITS3_EXTERN_BIG 0x01
95: #define RELOC_BITS3_EXTERN_LITTLE 0x80
96:
97: /* The r_type field in a reloc is one of the following values. I
98: don't know if any other values can appear. These seem to be all
99: that occur in the Ultrix 4.2 libraries. */
100: #define MIPS_R_IGNORE 0
101: #define MIPS_R_REFHALF 1
102: #define MIPS_R_REFWORD 2
103: #define MIPS_R_JMPADDR 3
104: #define MIPS_R_REFHI 4
105: #define MIPS_R_REFLO 5
106: #define MIPS_R_GPREL 6
107: #define MIPS_R_LITERAL 7
108:
109: /* FIXME: This relocation is used (internally only) to represent branches
110: when assembling. It should never appear in output files, and
111: be removed. (It used to be used for embedded-PIC support.) */
112: #define MIPS_R_PCREL16 12
113:
114: /********************** STABS **********************/
115:
116: #define MIPS_IS_STAB ECOFF_IS_STAB
117: #define MIPS_MARK_STAB ECOFF_MARK_STAB
118: #define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB
119:
120: /********************** SYMBOLIC INFORMATION **********************/
121:
122: /* Written by John Gilmore. */
123:
124: /* ECOFF uses COFF-like section structures, but its own symbol format.
125: This file defines the symbol format in fields whose size and alignment
126: will not vary on different host systems. */
127:
128: /* File header as a set of bytes */
129:
130: struct hdr_ext
131: {
132: unsigned char h_magic[2];
133: unsigned char h_vstamp[2];
134: unsigned char h_ilineMax[4];
135: unsigned char h_cbLine[4];
136: unsigned char h_cbLineOffset[4];
137: unsigned char h_idnMax[4];
138: unsigned char h_cbDnOffset[4];
139: unsigned char h_ipdMax[4];
140: unsigned char h_cbPdOffset[4];
141: unsigned char h_isymMax[4];
142: unsigned char h_cbSymOffset[4];
143: unsigned char h_ioptMax[4];
144: unsigned char h_cbOptOffset[4];
145: unsigned char h_iauxMax[4];
146: unsigned char h_cbAuxOffset[4];
147: unsigned char h_issMax[4];
148: unsigned char h_cbSsOffset[4];
149: unsigned char h_issExtMax[4];
150: unsigned char h_cbSsExtOffset[4];
151: unsigned char h_ifdMax[4];
152: unsigned char h_cbFdOffset[4];
153: unsigned char h_crfd[4];
154: unsigned char h_cbRfdOffset[4];
155: unsigned char h_iextMax[4];
156: unsigned char h_cbExtOffset[4];
157: };
158:
159: /* File descriptor external record */
160:
161: struct fdr_ext
162: {
163: unsigned char f_adr[4];
164: unsigned char f_rss[4];
165: unsigned char f_issBase[4];
166: unsigned char f_cbSs[4];
167: unsigned char f_isymBase[4];
168: unsigned char f_csym[4];
169: unsigned char f_ilineBase[4];
170: unsigned char f_cline[4];
171: unsigned char f_ioptBase[4];
172: unsigned char f_copt[4];
173: unsigned char f_ipdFirst[2];
174: unsigned char f_cpd[2];
175: unsigned char f_iauxBase[4];
176: unsigned char f_caux[4];
177: unsigned char f_rfdBase[4];
178: unsigned char f_crfd[4];
179: unsigned char f_bits1[1];
180: unsigned char f_bits2[3];
181: unsigned char f_cbLineOffset[4];
182: unsigned char f_cbLine[4];
183: };
184:
185: #define FDR_BITS1_LANG_BIG 0xF8
186: #define FDR_BITS1_LANG_SH_BIG 3
187: #define FDR_BITS1_LANG_LITTLE 0x1F
188: #define FDR_BITS1_LANG_SH_LITTLE 0
189:
190: #define FDR_BITS1_FMERGE_BIG 0x04
191: #define FDR_BITS1_FMERGE_LITTLE 0x20
192:
193: #define FDR_BITS1_FREADIN_BIG 0x02
194: #define FDR_BITS1_FREADIN_LITTLE 0x40
195:
196: #define FDR_BITS1_FBIGENDIAN_BIG 0x01
197: #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80
198:
199: #define FDR_BITS2_GLEVEL_BIG 0xC0
200: #define FDR_BITS2_GLEVEL_SH_BIG 6
201: #define FDR_BITS2_GLEVEL_LITTLE 0x03
202: #define FDR_BITS2_GLEVEL_SH_LITTLE 0
203:
204: /* We ignore the `reserved' field in bits2. */
205:
206: /* Procedure descriptor external record */
207:
208: struct pdr_ext
209: {
210: unsigned char p_adr[4];
211: unsigned char p_isym[4];
212: unsigned char p_iline[4];
213: unsigned char p_regmask[4];
214: unsigned char p_regoffset[4];
215: unsigned char p_iopt[4];
216: unsigned char p_fregmask[4];
217: unsigned char p_fregoffset[4];
218: unsigned char p_frameoffset[4];
219: unsigned char p_framereg[2];
220: unsigned char p_pcreg[2];
221: unsigned char p_lnLow[4];
222: unsigned char p_lnHigh[4];
223: unsigned char p_cbLineOffset[4];
224: };
225:
226: /* Runtime procedure table */
227:
228: struct rpdr_ext
229: {
230: unsigned char p_adr[4];
231: unsigned char p_regmask[4];
232: unsigned char p_regoffset[4];
233: unsigned char p_fregmask[4];
234: unsigned char p_fregoffset[4];
235: unsigned char p_frameoffset[4];
236: unsigned char p_framereg[2];
237: unsigned char p_pcreg[2];
238: unsigned char p_irpss[4];
239: unsigned char p_reserved[4];
240: unsigned char p_exception_info[4];
241: };
242:
243: /* Line numbers */
244:
245: struct line_ext
246: {
247: unsigned char l_line[4];
248: };
249:
250: /* Symbol external record */
251:
252: struct sym_ext
253: {
254: unsigned char s_iss[4];
255: unsigned char s_value[4];
256: unsigned char s_bits1[1];
257: unsigned char s_bits2[1];
258: unsigned char s_bits3[1];
259: unsigned char s_bits4[1];
260: };
261:
262: #define SYM_BITS1_ST_BIG 0xFC
263: #define SYM_BITS1_ST_SH_BIG 2
264: #define SYM_BITS1_ST_LITTLE 0x3F
265: #define SYM_BITS1_ST_SH_LITTLE 0
266:
267: #define SYM_BITS1_SC_BIG 0x03
268: #define SYM_BITS1_SC_SH_LEFT_BIG 3
269: #define SYM_BITS1_SC_LITTLE 0xC0
270: #define SYM_BITS1_SC_SH_LITTLE 6
271:
272: #define SYM_BITS2_SC_BIG 0xE0
273: #define SYM_BITS2_SC_SH_BIG 5
274: #define SYM_BITS2_SC_LITTLE 0x07
275: #define SYM_BITS2_SC_SH_LEFT_LITTLE 2
276:
277: #define SYM_BITS2_RESERVED_BIG 0x10
278: #define SYM_BITS2_RESERVED_LITTLE 0x08
279:
280: #define SYM_BITS2_INDEX_BIG 0x0F
281: #define SYM_BITS2_INDEX_SH_LEFT_BIG 16
282: #define SYM_BITS2_INDEX_LITTLE 0xF0
283: #define SYM_BITS2_INDEX_SH_LITTLE 4
284:
285: #define SYM_BITS3_INDEX_SH_LEFT_BIG 8
286: #define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4
287:
288: #define SYM_BITS4_INDEX_SH_LEFT_BIG 0
289: #define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12
290:
291: /* External symbol external record */
292:
293: struct ext_ext
294: {
295: unsigned char es_bits1[1];
296: unsigned char es_bits2[1];
297: unsigned char es_ifd[2];
298: struct sym_ext es_asym;
299: };
300:
301: #define EXT_BITS1_JMPTBL_BIG 0x80
302: #define EXT_BITS1_JMPTBL_LITTLE 0x01
303:
304: #define EXT_BITS1_COBOL_MAIN_BIG 0x40
305: #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02
306:
307: #define EXT_BITS1_WEAKEXT_BIG 0x20
308: #define EXT_BITS1_WEAKEXT_LITTLE 0x04
309:
310: /* Dense numbers external record */
311:
312: struct dnr_ext
313: {
314: unsigned char d_rfd[4];
315: unsigned char d_index[4];
316: };
317:
318: /* Relative file descriptor */
319:
320: struct rfd_ext
321: {
322: unsigned char rfd[4];
323: };
324:
325: /* Optimizer symbol external record */
326:
327: struct opt_ext
328: {
329: unsigned char o_bits1[1];
330: unsigned char o_bits2[1];
331: unsigned char o_bits3[1];
332: unsigned char o_bits4[1];
333: struct rndx_ext o_rndx;
334: unsigned char o_offset[4];
335: };
336:
337: #define OPT_BITS2_VALUE_SH_LEFT_BIG 16
338: #define OPT_BITS2_VALUE_SH_LEFT_LITTLE 0
339:
340: #define OPT_BITS3_VALUE_SH_LEFT_BIG 8
341: #define OPT_BITS3_VALUE_SH_LEFT_LITTLE 8
342:
343: #define OPT_BITS4_VALUE_SH_LEFT_BIG 0
344: #define OPT_BITS4_VALUE_SH_LEFT_LITTLE 16
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