1/* IBM RS/6000 "XCOFF" file definitions for BFD.
2   Copyright (C) 1990, 1991, 2001 Free Software Foundation, Inc.
3   FIXME: Can someone provide a transliteration of this name into ASCII?
4   Using the following chars caused a compiler warning on HIUX (so I replaced
5   them with octal escapes), and isn't useful without an understanding of what
6   character set it is.
7   Written by Mimi Ph\373\364ng-Th\345o V\365 of IBM
8   and John Gilmore of Cygnus Support.  */
9
10/********************** FILE HEADER **********************/
11
12struct external_filehdr {
13	char f_magic[2];	/* magic number			*/
14	char f_nscns[2];	/* number of sections		*/
15	char f_timdat[4];	/* time & date stamp		*/
16	char f_symptr[4];	/* file pointer to symtab	*/
17	char f_nsyms[4];	/* number of symtab entries	*/
18	char f_opthdr[2];	/* sizeof(optional hdr)		*/
19	char f_flags[2];	/* flags			*/
20};
21
22        /* IBM RS/6000 */
23#define U802WRMAGIC     0730    /* writeable text segments **chh**      */
24#define U802ROMAGIC     0735    /* readonly sharable text segments      */
25#define U802TOCMAGIC    0737    /* readonly text segments and TOC       */
26
27#define BADMAG(x)	\
28	((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \
29	 (x).f_magic != U802TOCMAGIC)
30
31#define	FILHDR	struct external_filehdr
32#define	FILHSZ	20
33
34
35/********************** AOUT "OPTIONAL HEADER" **********************/
36
37
38typedef struct
39{
40  unsigned char	magic[2];	/* type of file			*/
41  unsigned char	vstamp[2];	/* version stamp		*/
42  unsigned char	tsize[4];	/* text size in bytes, padded to FW bdry */
43  unsigned char	dsize[4];	/* initialized data "  "	*/
44  unsigned char	bsize[4];	/* uninitialized data "   "	*/
45  unsigned char	entry[4];	/* entry pt.			*/
46  unsigned char	text_start[4];	/* base of text used for this file */
47  unsigned char	data_start[4];	/* base of data used for this file */
48  unsigned char	o_toc[4];	/* address of TOC */
49  unsigned char	o_snentry[2];	/* section number of entry point */
50  unsigned char	o_sntext[2];	/* section number of .text section */
51  unsigned char	o_sndata[2];	/* section number of .data section */
52  unsigned char	o_sntoc[2];	/* section number of TOC */
53  unsigned char	o_snloader[2];	/* section number of .loader section */
54  unsigned char	o_snbss[2];	/* section number of .bss section */
55  unsigned char	o_algntext[2];	/* .text alignment */
56  unsigned char	o_algndata[2];	/* .data alignment */
57  unsigned char	o_modtype[2];	/* module type (??) */
58  unsigned char o_cputype[2];	/* cpu type */
59  unsigned char	o_maxstack[4];	/* max stack size (??) */
60  unsigned char o_maxdata[4];	/* max data size (??) */
61  unsigned char	o_resv2[12];	/* reserved */
62}
63AOUTHDR;
64
65#define AOUTSZ 72
66#define SMALL_AOUTSZ (28)
67#define AOUTHDRSZ 72
68
69/********************** SECTION HEADER **********************/
70
71
72struct external_scnhdr {
73	char		s_name[8];	/* section name			*/
74	char		s_paddr[4];	/* physical address, aliased s_nlib */
75	char		s_vaddr[4];	/* virtual address		*/
76	char		s_size[4];	/* section size			*/
77	char		s_scnptr[4];	/* file ptr to raw data for section */
78	char		s_relptr[4];	/* file ptr to relocation	*/
79	char		s_lnnoptr[4];	/* file ptr to line numbers	*/
80	char		s_nreloc[2];	/* number of relocation entries	*/
81	char		s_nlnno[2];	/* number of line number entries*/
82	char		s_flags[4];	/* flags			*/
83};
84
85#define	SCNHDR	struct external_scnhdr
86#define	SCNHSZ	40
87
88/********************** LINE NUMBERS **********************/
89
90/* 1 line number entry for every "breakpointable" source line in a section.
91 * Line numbers are grouped on a per function basis; first entry in a function
92 * grouping will have l_lnno = 0 and in place of physical address will be the
93 * symbol table index of the function name.
94 */
95struct external_lineno {
96	union {
97		char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
98		char l_paddr[4];	/* (physical) address of line number	*/
99	} l_addr;
100	char l_lnno[2];	/* line number		*/
101};
102
103
104#define	LINENO	struct external_lineno
105#define	LINESZ	6
106
107
108/********************** SYMBOLS **********************/
109
110#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
111#define E_FILNMLEN	14	/* # characters in a file name		*/
112#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
113
114struct external_syment
115{
116  union {
117    char e_name[E_SYMNMLEN];
118    struct {
119      char e_zeroes[4];
120      char e_offset[4];
121    } e;
122  } e;
123  char e_value[4];
124  char e_scnum[2];
125  char e_type[2];
126  char e_sclass[1];
127  char e_numaux[1];
128};
129
130
131
132#define N_BTMASK	(017)
133#define N_TMASK		(060)
134#define N_BTSHFT	(4)
135#define N_TSHIFT	(2)
136
137
138union external_auxent {
139	struct {
140		char x_tagndx[4];	/* str, un, or enum tag indx */
141		union {
142			struct {
143			    char  x_lnno[2]; /* declaration line number */
144			    char  x_size[2]; /* str/union/array size */
145			} x_lnsz;
146			char x_fsize[4];	/* size of function */
147		} x_misc;
148		union {
149			struct {		/* if ISFCN, tag, or .bb */
150			    char x_lnnoptr[4];	/* ptr to fcn line # */
151			    char x_endndx[4];	/* entry ndx past block end */
152			} x_fcn;
153			struct {		/* if ISARY, up to 4 dimen. */
154			    char x_dimen[E_DIMNUM][2];
155			} x_ary;
156		} x_fcnary;
157		char x_tvndx[2];		/* tv index */
158	} x_sym;
159
160	union {
161		char x_fname[E_FILNMLEN];
162		struct {
163			char x_zeroes[4];
164			char x_offset[4];
165		} x_n;
166	} x_file;
167
168	struct {
169		char x_scnlen[4];			/* section length */
170		char x_nreloc[2];	/* # relocation entries */
171		char x_nlinno[2];	/* # line numbers */
172	} x_scn;
173
174        struct {
175		char x_tvfill[4];	/* tv fill value */
176		char x_tvlen[2];	/* length of .tv */
177		char x_tvran[2][2];	/* tv range */
178	} x_tv;		/* info about .tv section (in auxent of symbol .tv)) */
179
180	struct {
181		unsigned char x_scnlen[4];
182		unsigned char x_parmhash[4];
183		unsigned char x_snhash[2];
184		unsigned char x_smtyp[1];
185		unsigned char x_smclas[1];
186		unsigned char x_stab[4];
187		unsigned char x_snstab[2];
188	} x_csect;
189
190};
191
192#define	SYMENT	struct external_syment
193#define	SYMESZ	18
194#define	AUXENT	union external_auxent
195#define	AUXESZ	18
196#define DBXMASK 0x80		/* for dbx storage mask */
197#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
198
199
200
201/********************** RELOCATION DIRECTIVES **********************/
202
203
204struct external_reloc {
205  char r_vaddr[4];
206  char r_symndx[4];
207  char r_size[1];
208  char r_type[1];
209};
210
211
212#define RELOC struct external_reloc
213#define RELSZ 10
214
215#define DEFAULT_DATA_SECTION_ALIGNMENT 4
216#define DEFAULT_BSS_SECTION_ALIGNMENT 4
217#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
218/* For new sections we havn't heard of before */
219#define DEFAULT_SECTION_ALIGNMENT 4
220
221/* The ldhdr structure.  This appears at the start of the .loader
222   section.  */
223
224struct external_ldhdr
225{
226  bfd_byte l_version[4];
227  bfd_byte l_nsyms[4];
228  bfd_byte l_nreloc[4];
229  bfd_byte l_istlen[4];
230  bfd_byte l_nimpid[4];
231  bfd_byte l_impoff[4];
232  bfd_byte l_stlen[4];
233  bfd_byte l_stoff[4];
234};
235
236#define LDHDRSZ (8 * 4)
237
238struct external_ldsym
239{
240  union
241    {
242      bfd_byte _l_name[SYMNMLEN];
243      struct
244	{
245	  bfd_byte _l_zeroes[4];
246	  bfd_byte _l_offset[4];
247	} _l_l;
248    } _l;
249  bfd_byte l_value[4];
250  bfd_byte l_scnum[2];
251  bfd_byte l_smtype[1];
252  bfd_byte l_smclas[1];
253  bfd_byte l_ifile[4];
254  bfd_byte l_parm[4];
255};
256
257#define LDSYMSZ (8 + 3 * 4 + 2 + 2)
258
259struct external_ldrel
260{
261  bfd_byte l_vaddr[4];
262  bfd_byte l_symndx[4];
263  bfd_byte l_rtype[2];
264  bfd_byte l_rsecnm[2];
265};
266
267#define LDRELSZ (2 * 4 + 2 * 2)
268