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[binutils.git] / include / coff / rs6000.h
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1 /* IBM RS/6000 "XCOFF" file definitions for BFD.
2 Copyright (C) 1990, 1991 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. */
10 /********************** FILE HEADER **********************/
12 struct 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 */
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 */
27 #define BADMAG(x) \
28 ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \
29 (x).f_magic != U802TOCMAGIC)
31 #define FILHDR struct external_filehdr
32 #define FILHSZ 20
35 /********************** AOUT "OPTIONAL HEADER" **********************/
38 typedef struct
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 */
63 AOUTHDR;
65 #define AOUTSZ 72
66 #define SMALL_AOUTSZ (28)
67 #define AOUTHDRSZ 72
69 /********************** SECTION HEADER **********************/
72 struct 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 */
85 #define SCNHDR struct external_scnhdr
86 #define SCNHSZ 40
88 /********************** LINE NUMBERS **********************/
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.
95 struct 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 */
104 #define LINENO struct external_lineno
105 #define LINESZ 6
108 /********************** SYMBOLS **********************/
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 */
114 struct external_syment
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];
132 #define N_BTMASK (017)
133 #define N_TMASK (060)
134 #define N_BTSHFT (4)
135 #define N_TSHIFT (2)
138 union 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;
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;
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;
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)) */
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;
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)
201 /********************** RELOCATION DIRECTIVES **********************/
204 struct external_reloc {
205 char r_vaddr[4];
206 char r_symndx[4];
207 char r_size[1];
208 char r_type[1];
212 #define RELOC struct external_reloc
213 #define RELSZ 10
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
221 /* The ldhdr structure. This appears at the start of the .loader
222 section. */
224 struct external_ldhdr
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];
236 #define LDHDRSZ (8 * 4)
238 struct external_ldsym
240 union
242 bfd_byte _l_name[SYMNMLEN];
243 struct
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];
257 #define LDSYMSZ (8 + 3 * 4 + 2 + 2)
259 struct external_ldrel
261 bfd_byte l_vaddr[4];
262 bfd_byte l_symndx[4];
263 bfd_byte l_rtype[2];
264 bfd_byte l_rsecnm[2];
267 #define LDRELSZ (2 * 4 + 2 * 2)