1/* external.h  -- External COFF structures
2
3   Copyright 2001, 2006 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  } ATTRIBUTE_PACKED
54AOUTHDR;
55
56#define AOUTHDRSZ 28
57#define AOUTSZ 28
58
59typedef struct external_aouthdr64
60{
61  char magic[2];	/* Type of file.			*/
62  char vstamp[2];	/* Version stamp.			*/
63  char tsize[4];	/* Text size in bytes, padded to FW bdry*/
64  char dsize[4];	/* Initialized data "  ".		*/
65  char bsize[4];	/* Uninitialized data "   ".		*/
66  char entry[4];	/* Entry pt.				*/
67  char text_start[4];	/* Base of text used for this file. 	*/
68}
69AOUTHDR64;
70#define AOUTHDRSZ64	24
71
72#endif /* not DO_NOT_DEFINE_AOUTHDR */
73
74#ifndef DO_NOT_DEFINE_SCNHDR
75/********************** SECTION HEADER **********************/
76
77struct external_scnhdr
78  {
79    char s_name[8];	/* section name				*/
80    char s_paddr[4];	/* physical address, aliased s_nlib 	*/
81    char s_vaddr[4];	/* virtual address			*/
82    char s_size[4];	/* section size				*/
83    char s_scnptr[4];	/* file ptr to raw data for section 	*/
84    char s_relptr[4];	/* file ptr to relocation		*/
85    char s_lnnoptr[4];	/* file ptr to line numbers		*/
86    char s_nreloc[2];	/* number of relocation entries		*/
87    char s_nlnno[2];	/* number of line number entries	*/
88    char s_flags[4];	/* flags				*/
89  };
90
91#define	SCNHDR	struct external_scnhdr
92#define	SCNHSZ	40
93
94/* Names of "special" sections.  */
95
96#define _TEXT	 ".text"
97#define _DATA	 ".data"
98#define _BSS	 ".bss"
99#define _COMMENT ".comment"
100#define _LIB     ".lib"
101#endif /* not DO_NOT_DEFINE_SCNHDR */
102
103#ifndef DO_NOT_DEFINE_LINENO
104
105/********************** LINE NUMBERS **********************/
106
107#ifndef L_LNNO_SIZE
108#error  L_LNNO_SIZE needs to be defined
109#endif
110
111/* 1 line number entry for every "breakpointable" source line in a section.
112   Line numbers are grouped on a per function basis; first entry in a function
113   grouping will have l_lnno = 0 and in place of physical address will be the
114   symbol table index of the function name.  */
115struct external_lineno
116{
117  union
118  {
119    char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
120    char l_paddr[4];	/* (physical) address of line number	*/
121  } l_addr;
122
123  char l_lnno[L_LNNO_SIZE];	/* line number		*/
124};
125
126#define	LINENO	struct external_lineno
127#define	LINESZ	(4 + L_LNNO_SIZE)
128
129#if L_LNNO_SIZE == 4
130#define GET_LINENO_LNNO(abfd, ext)      H_GET_32 (abfd,      (ext->l_lnno))
131#define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_32 (abfd, val, (ext->l_lnno))
132#endif
133#if L_LNNO_SIZE == 2
134#define GET_LINENO_LNNO(abfd, ext)      H_GET_16 (abfd,      (ext->l_lnno))
135#define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_16 (abfd, val, (ext->l_lnno))
136#endif
137
138#endif /* not DO_NOT_DEFINE_LINENO */
139
140#ifndef DO_NOT_DEFINE_SYMENT
141/********************** SYMBOLS **********************/
142
143#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
144#ifndef E_FILNMLEN
145#define E_FILNMLEN	14
146#endif
147#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
148
149struct external_syment
150{
151  union
152  {
153    char e_name[E_SYMNMLEN];
154
155    struct
156    {
157      char e_zeroes[4];
158      char e_offset[4];
159    } e;
160  } e;
161
162  char e_value[4];
163  char e_scnum[2];
164  char e_type[2];
165  char e_sclass[1];
166  char e_numaux[1];
167} ATTRIBUTE_PACKED ;
168
169#define	SYMENT	struct external_syment
170#define	SYMESZ	18
171
172#ifndef N_BTMASK
173#define N_BTMASK	0xf
174#endif
175
176#ifndef N_TMASK
177#define N_TMASK		0x30
178#endif
179
180#ifndef N_BTSHFT
181#define N_BTSHFT	4
182#endif
183
184#ifndef N_TSHIFT
185#define N_TSHIFT	2
186#endif
187
188#endif /* not DO_NOT_DEFINE_SYMENT */
189
190#ifndef DO_NOT_DEFINE_AUXENT
191
192union external_auxent
193{
194  struct
195  {
196    char x_tagndx[4];		/* str, un, or enum tag indx */
197
198    union
199    {
200      struct
201      {
202	char  x_lnno[2]; /* declaration line number */
203	char  x_size[2]; /* str/union/array size */
204      } x_lnsz;
205
206      char x_fsize[4];	/* size of function */
207
208    } x_misc;
209
210    union
211    {
212      struct 		/* if ISFCN, tag, or .bb */
213      {
214	char x_lnnoptr[4];	/* ptr to fcn line # */
215	char x_endndx[4];	/* entry ndx past block end */
216      } x_fcn;
217
218      struct 		/* if ISARY, up to 4 dimen. */
219      {
220	char x_dimen[E_DIMNUM][2];
221      } x_ary;
222
223    } x_fcnary;
224
225    char x_tvndx[2];	/* tv index */
226
227  } x_sym;
228
229  union
230  {
231    char x_fname[E_FILNMLEN];
232
233    struct
234    {
235      char x_zeroes[4];
236      char x_offset[4];
237    } x_n;
238
239  } x_file;
240
241  struct
242  {
243    char x_scnlen[4];	/* section length */
244    char x_nreloc[2];	/* # relocation entries */
245    char x_nlinno[2];	/* # line numbers */
246#ifdef INCLUDE_COMDAT_FIELDS_IN_AUXENT
247    char x_checksum[4];		   /* section COMDAT checksum	      */
248    char x_associated[2];	   /* COMDAT associated section index */
249    char x_comdat[1];		   /* COMDAT selection number	      */
250#endif
251  } x_scn;
252
253  struct
254  {
255    char x_tvfill[4];	/* tv fill value */
256    char x_tvlen[2];	/* length of .tv */
257    char x_tvran[2][2];	/* tv range */
258  } x_tv;		/* info about .tv section (in auxent of symbol .tv)) */
259} ATTRIBUTE_PACKED ;
260
261#define	AUXENT	union external_auxent
262#define	AUXESZ	18
263
264#define _ETEXT	"etext"
265
266#endif /* not DO_NOT_DEFINE_AUXENT */
267
268#endif /* COFF_EXTERNAL_H */
269