1/* IBM RS/6000 "XCOFF" file definitions for BFD.
2   Copyright (C) 1990, 1991, 2001 Free Software Foundation, Inc.
3   Written by Mimi Phuong-Thao Vo of IBM
4   and John Gilmore of Cygnus Support.  */
5
6/********************** FILE HEADER **********************/
7
8struct external_filehdr {
9	char f_magic[2];	/* magic number			*/
10	char f_nscns[2];	/* number of sections		*/
11	char f_timdat[4];	/* time & date stamp		*/
12	char f_symptr[4];	/* file pointer to symtab	*/
13	char f_nsyms[4];	/* number of symtab entries	*/
14	char f_opthdr[2];	/* sizeof(optional hdr)		*/
15	char f_flags[2];	/* flags			*/
16};
17
18        /* IBM RS/6000 */
19#define U802WRMAGIC     0730    /* writeable text segments **chh**      */
20#define U802ROMAGIC     0735    /* readonly sharable text segments      */
21#define U802TOCMAGIC    0737    /* readonly text segments and TOC       */
22
23#define BADMAG(x)	\
24	((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \
25	 (x).f_magic != U802TOCMAGIC)
26
27#define	FILHDR	struct external_filehdr
28#define	FILHSZ	20
29
30
31/********************** AOUT "OPTIONAL HEADER" **********************/
32
33
34typedef struct
35{
36  unsigned char	magic[2];	/* type of file			*/
37  unsigned char	vstamp[2];	/* version stamp		*/
38  unsigned char	tsize[4];	/* text size in bytes, padded to FW bdry */
39  unsigned char	dsize[4];	/* initialized data "  "	*/
40  unsigned char	bsize[4];	/* uninitialized data "   "	*/
41  unsigned char	entry[4];	/* entry pt.			*/
42  unsigned char	text_start[4];	/* base of text used for this file */
43  unsigned char	data_start[4];	/* base of data used for this file */
44  unsigned char	o_toc[4];	/* address of TOC */
45  unsigned char	o_snentry[2];	/* section number of entry point */
46  unsigned char	o_sntext[2];	/* section number of .text section */
47  unsigned char	o_sndata[2];	/* section number of .data section */
48  unsigned char	o_sntoc[2];	/* section number of TOC */
49  unsigned char	o_snloader[2];	/* section number of .loader section */
50  unsigned char	o_snbss[2];	/* section number of .bss section */
51  unsigned char	o_algntext[2];	/* .text alignment */
52  unsigned char	o_algndata[2];	/* .data alignment */
53  unsigned char	o_modtype[2];	/* module type (??) */
54  unsigned char o_cputype[2];	/* cpu type */
55  unsigned char	o_maxstack[4];	/* max stack size (??) */
56  unsigned char o_maxdata[4];	/* max data size (??) */
57  unsigned char	o_resv2[12];	/* reserved */
58}
59AOUTHDR;
60
61#define AOUTSZ 72
62#define SMALL_AOUTSZ (28)
63#define AOUTHDRSZ 72
64
65/********************** SECTION HEADER **********************/
66
67
68struct external_scnhdr {
69	char		s_name[8];	/* section name			*/
70	char		s_paddr[4];	/* physical address, aliased s_nlib */
71	char		s_vaddr[4];	/* virtual address		*/
72	char		s_size[4];	/* section size			*/
73	char		s_scnptr[4];	/* file ptr to raw data for section */
74	char		s_relptr[4];	/* file ptr to relocation	*/
75	char		s_lnnoptr[4];	/* file ptr to line numbers	*/
76	char		s_nreloc[2];	/* number of relocation entries	*/
77	char		s_nlnno[2];	/* number of line number entries*/
78	char		s_flags[4];	/* flags			*/
79};
80
81#define	SCNHDR	struct external_scnhdr
82#define	SCNHSZ	40
83
84/********************** LINE NUMBERS **********************/
85
86/* 1 line number entry for every "breakpointable" source line in a section.
87 * Line numbers are grouped on a per function basis; first entry in a function
88 * grouping will have l_lnno = 0 and in place of physical address will be the
89 * symbol table index of the function name.
90 */
91struct external_lineno {
92	union {
93		char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
94		char l_paddr[4];	/* (physical) address of line number	*/
95	} l_addr;
96	char l_lnno[2];	/* line number		*/
97};
98
99
100#define	LINENO	struct external_lineno
101#define	LINESZ	6
102
103
104/********************** SYMBOLS **********************/
105
106#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
107#define E_FILNMLEN	14	/* # characters in a file name		*/
108#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
109
110struct external_syment
111{
112  union {
113    char e_name[E_SYMNMLEN];
114    struct {
115      char e_zeroes[4];
116      char e_offset[4];
117    } e;
118  } e;
119  char e_value[4];
120  char e_scnum[2];
121  char e_type[2];
122  char e_sclass[1];
123  char e_numaux[1];
124};
125
126
127
128#define N_BTMASK	(017)
129#define N_TMASK		(060)
130#define N_BTSHFT	(4)
131#define N_TSHIFT	(2)
132
133
134union external_auxent {
135	struct {
136		char x_tagndx[4];	/* str, un, or enum tag indx */
137		union {
138			struct {
139			    char  x_lnno[2]; /* declaration line number */
140			    char  x_size[2]; /* str/union/array size */
141			} x_lnsz;
142			char x_fsize[4];	/* size of function */
143		} x_misc;
144		union {
145			struct {		/* if ISFCN, tag, or .bb */
146			    char x_lnnoptr[4];	/* ptr to fcn line # */
147			    char x_endndx[4];	/* entry ndx past block end */
148			} x_fcn;
149			struct {		/* if ISARY, up to 4 dimen. */
150			    char x_dimen[E_DIMNUM][2];
151			} x_ary;
152		} x_fcnary;
153		char x_tvndx[2];		/* tv index */
154	} x_sym;
155
156	union {
157		char x_fname[E_FILNMLEN];
158		struct {
159			char x_zeroes[4];
160			char x_offset[4];
161		} x_n;
162	} x_file;
163
164	struct {
165		char x_scnlen[4];			/* section length */
166		char x_nreloc[2];	/* # relocation entries */
167		char x_nlinno[2];	/* # line numbers */
168	} x_scn;
169
170        struct {
171		char x_tvfill[4];	/* tv fill value */
172		char x_tvlen[2];	/* length of .tv */
173		char x_tvran[2][2];	/* tv range */
174	} x_tv;		/* info about .tv section (in auxent of symbol .tv)) */
175
176	struct {
177		unsigned char x_scnlen[4];
178		unsigned char x_parmhash[4];
179		unsigned char x_snhash[2];
180		unsigned char x_smtyp[1];
181		unsigned char x_smclas[1];
182		unsigned char x_stab[4];
183		unsigned char x_snstab[2];
184	} x_csect;
185
186};
187
188#define	SYMENT	struct external_syment
189#define	SYMESZ	18
190#define	AUXENT	union external_auxent
191#define	AUXESZ	18
192#define DBXMASK 0x80		/* for dbx storage mask */
193#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
194
195
196
197/********************** RELOCATION DIRECTIVES **********************/
198
199
200struct external_reloc {
201  char r_vaddr[4];
202  char r_symndx[4];
203  char r_size[1];
204  char r_type[1];
205};
206
207
208#define RELOC struct external_reloc
209#define RELSZ 10
210
211#define DEFAULT_DATA_SECTION_ALIGNMENT 4
212#define DEFAULT_BSS_SECTION_ALIGNMENT 4
213#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
214/* For new sections we havn't heard of before */
215#define DEFAULT_SECTION_ALIGNMENT 4
216
217/* The ldhdr structure.  This appears at the start of the .loader
218   section.  */
219
220struct external_ldhdr
221{
222  bfd_byte l_version[4];
223  bfd_byte l_nsyms[4];
224  bfd_byte l_nreloc[4];
225  bfd_byte l_istlen[4];
226  bfd_byte l_nimpid[4];
227  bfd_byte l_impoff[4];
228  bfd_byte l_stlen[4];
229  bfd_byte l_stoff[4];
230};
231
232#define LDHDRSZ (8 * 4)
233
234struct external_ldsym
235{
236  union
237    {
238      bfd_byte _l_name[SYMNMLEN];
239      struct
240	{
241	  bfd_byte _l_zeroes[4];
242	  bfd_byte _l_offset[4];
243	} _l_l;
244    } _l;
245  bfd_byte l_value[4];
246  bfd_byte l_scnum[2];
247  bfd_byte l_smtype[1];
248  bfd_byte l_smclas[1];
249  bfd_byte l_ifile[4];
250  bfd_byte l_parm[4];
251};
252
253#define LDSYMSZ (8 + 3 * 4 + 2 + 2)
254
255struct external_ldrel
256{
257  bfd_byte l_vaddr[4];
258  bfd_byte l_symndx[4];
259  bfd_byte l_rtype[2];
260  bfd_byte l_rsecnm[2];
261};
262
263#define LDRELSZ (2 * 4 + 2 * 2)
264