1/* external.h  -- External COFF structures
2
3   Copyright 2001 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 2 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software
17   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
18
19#ifndef COFF_EXTERNAL_H
20#define COFF_EXTERNAL_H
21
22#ifndef DO_NOT_DEFINE_FILHDR
23/********************** FILE HEADER **********************/
24
25struct external_filehdr
26  {
27    char f_magic[2];	/* magic number			*/
28    char f_nscns[2];	/* number of sections		*/
29    char f_timdat[4];	/* time & date stamp		*/
30    char f_symptr[4];	/* file pointer to symtab	*/
31    char f_nsyms[4];	/* number of symtab entries	*/
32    char f_opthdr[2];	/* sizeof(optional hdr)		*/
33    char f_flags[2];	/* flags			*/
34  };
35
36#define	FILHDR	struct external_filehdr
37#define	FILHSZ	20
38#endif
39
40#ifndef DO_NOT_DEFINE_AOUTHDR
41/********************** AOUT "OPTIONAL HEADER" **********************/
42
43typedef struct external_aouthdr
44  {
45    char magic[2];	/* type of file				*/
46    char vstamp[2];	/* version stamp			*/
47    char tsize[4];	/* text size in bytes, padded to FW bdry*/
48    char dsize[4];	/* initialized data "  "		*/
49    char bsize[4];	/* uninitialized data "   "		*/
50    char entry[4];	/* entry pt.				*/
51    char text_start[4];	/* base of text used for this file 	*/
52    char data_start[4];	/* base of data used for this file 	*/
53  }
54AOUTHDR;
55
56#define AOUTHDRSZ 28
57#define AOUTSZ 28
58#endif
59
60typedef struct external_aouthdr64
61{
62  char magic[2];	/* Type of file.			*/
63  char vstamp[2];	/* Version stamp.			*/
64  char tsize[4];	/* Text size in bytes, padded to FW bdry*/
65  char dsize[4];	/* Initialized data "  ".		*/
66  char bsize[4];	/* Uninitialized data "   ".		*/
67  char entry[4];	/* Entry pt.				*/
68  char text_start[4];	/* Base of text used for this file. 	*/
69}
70AOUTHDR64;
71#define AOUTHDRSZ64	24
72
73#ifndef DO_NOT_DEFINE_SCNHDR
74/********************** SECTION HEADER **********************/
75
76struct external_scnhdr
77  {
78    char s_name[8];	/* section name				*/
79    char s_paddr[4];	/* physical address, aliased s_nlib 	*/
80    char s_vaddr[4];	/* virtual address			*/
81    char s_size[4];	/* section size				*/
82    char s_scnptr[4];	/* file ptr to raw data for section 	*/
83    char s_relptr[4];	/* file ptr to relocation		*/
84    char s_lnnoptr[4];	/* file ptr to line numbers		*/
85    char s_nreloc[2];	/* number of relocation entries		*/
86    char s_nlnno[2];	/* number of line number entries	*/
87    char s_flags[4];	/* flags				*/
88  };
89
90#define	SCNHDR	struct external_scnhdr
91#define	SCNHSZ	40
92
93/* Names of "special" sections.  */
94
95#define _TEXT	 ".text"
96#define _DATA	 ".data"
97#define _BSS	 ".bss"
98#define _COMMENT ".comment"
99#define _LIB     ".lib"
100#endif /* not DO_NOT_DEFINE_SCNHDR */
101
102#ifndef DO_NOT_DEFINE_LINENO
103
104/********************** LINE NUMBERS **********************/
105
106#ifndef L_LNNO_SIZE
107#error  L_LNNO_SIZE needs to be defined
108#endif
109
110/* 1 line number entry for every "breakpointable" source line in a section.
111   Line numbers are grouped on a per function basis; first entry in a function
112   grouping will have l_lnno = 0 and in place of physical address will be the
113   symbol table index of the function name.  */
114struct external_lineno
115{
116  union
117  {
118    char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
119    char l_paddr[4];	/* (physical) address of line number	*/
120  } l_addr;
121
122  char l_lnno[L_LNNO_SIZE];	/* line number		*/
123};
124
125#define	LINENO	struct external_lineno
126#define	LINESZ	(4 + L_LNNO_SIZE)
127
128#if L_LNNO_SIZE == 4
129#define GET_LINENO_LNNO(abfd, ext)      H_GET_32 (abfd,      (ext->l_lnno))
130#define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_32 (abfd, val, (ext->l_lnno))
131#endif
132#if L_LNNO_SIZE == 2
133#define GET_LINENO_LNNO(abfd, ext)      H_GET_16 (abfd,      (ext->l_lnno))
134#define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_16 (abfd, val, (ext->l_lnno))
135#endif
136
137#endif /* not DO_NOT_DEFINE_LINENO */
138
139#ifndef DO_NOT_DEFINE_SYMENT
140/********************** SYMBOLS **********************/
141
142#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
143#ifndef E_FILNMLEN
144#define E_FILNMLEN	14
145#endif
146#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
147
148struct external_syment
149{
150  union
151  {
152    char e_name[E_SYMNMLEN];
153
154    struct
155    {
156      char e_zeroes[4];
157      char e_offset[4];
158    } e;
159  } e;
160
161  char e_value[4];
162  char e_scnum[2];
163  char e_type[2];
164  char e_sclass[1];
165  char e_numaux[1];
166};
167
168#define	SYMENT	struct external_syment
169#define	SYMESZ	18
170
171#ifndef N_BTMASK
172#define N_BTMASK	0xf
173#endif
174
175#ifndef N_TMASK
176#define N_TMASK		0x30
177#endif
178
179#ifndef N_BTSHFT
180#define N_BTSHFT	4
181#endif
182
183#ifndef N_TSHIFT
184#define N_TSHIFT	2
185#endif
186
187#endif /* not DO_NOT_DEFINE_SYMENT */
188
189#ifndef DO_NOT_DEFINE_AUXENT
190
191union external_auxent
192{
193  struct
194  {
195    char x_tagndx[4];		/* str, un, or enum tag indx */
196
197    union
198    {
199      struct
200      {
201	char  x_lnno[2]; /* declaration line number */
202	char  x_size[2]; /* str/union/array size */
203      } x_lnsz;
204
205      char x_fsize[4];	/* size of function */
206
207    } x_misc;
208
209    union
210    {
211      struct 		/* if ISFCN, tag, or .bb */
212      {
213	char x_lnnoptr[4];	/* ptr to fcn line # */
214	char x_endndx[4];	/* entry ndx past block end */
215      } x_fcn;
216
217      struct 		/* if ISARY, up to 4 dimen. */
218      {
219	char x_dimen[E_DIMNUM][2];
220      } x_ary;
221
222    } x_fcnary;
223
224    char x_tvndx[2];	/* tv index */
225
226  } x_sym;
227
228  union
229  {
230    char x_fname[E_FILNMLEN];
231
232    struct
233    {
234      char x_zeroes[4];
235      char x_offset[4];
236    } x_n;
237
238  } x_file;
239
240  struct
241  {
242    char x_scnlen[4];	/* section length */
243    char x_nreloc[2];	/* # relocation entries */
244    char x_nlinno[2];	/* # line numbers */
245#ifdef INCLUDE_COMDAT_FIELDS_IN_AUXENT
246    char x_checksum[4];		   /* section COMDAT checksum	      */
247    char x_associated[2];	   /* COMDAT associated section index */
248    char x_comdat[1];		   /* COMDAT selection number	      */
249#endif
250  } x_scn;
251
252  struct
253  {
254    char x_tvfill[4];	/* tv fill value */
255    char x_tvlen[2];	/* length of .tv */
256    char x_tvran[2][2];	/* tv range */
257  } x_tv;		/* info about .tv section (in auxent of symbol .tv)) */
258};
259
260#define	AUXENT	union external_auxent
261#define	AUXESZ	18
262
263#define _ETEXT	"etext"
264
265#endif /* not DO_NOT_DEFINE_AUXENT */
266
267#endif /* COFF_EXTERNAL_H */
268