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. */
6 /********************** FILE HEADER **********************/
8 struct 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 */
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 */
24 ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \
25 (x).f_magic != U802TOCMAGIC)
27 #define FILHDR struct external_filehdr
31 /********************** AOUT "OPTIONAL HEADER" **********************/
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 */
62 #define SMALL_AOUTSZ (28)
65 /********************** SECTION HEADER **********************/
68 struct 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 */
81 #define SCNHDR struct external_scnhdr
84 /********************** LINE NUMBERS **********************/
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.
91 struct external_lineno
{
93 char l_symndx
[4]; /* function name symbol index, iff l_lnno == 0*/
94 char l_paddr
[4]; /* (physical) address of line number */
96 char l_lnno
[2]; /* line number */
100 #define LINENO struct external_lineno
104 /********************** SYMBOLS **********************/
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 */
110 struct external_syment
113 char e_name
[E_SYMNMLEN
];
128 #define N_BTMASK (017)
129 #define N_TMASK (060)
134 union external_auxent
{
136 char x_tagndx
[4]; /* str, un, or enum tag indx */
139 char x_lnno
[2]; /* declaration line number */
140 char x_size
[2]; /* str/union/array size */
142 char x_fsize
[4]; /* size of function */
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 */
149 struct { /* if ISARY, up to 4 dimen. */
150 char x_dimen
[E_DIMNUM
][2];
153 char x_tvndx
[2]; /* tv index */
157 char x_fname
[E_FILNMLEN
];
165 char x_scnlen
[4]; /* section length */
166 char x_nreloc
[2]; /* # relocation entries */
167 char x_nlinno
[2]; /* # line numbers */
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)) */
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];
188 #define SYMENT struct external_syment
190 #define AUXENT union external_auxent
192 #define DBXMASK 0x80 /* for dbx storage mask */
193 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
197 /********************** RELOCATION DIRECTIVES **********************/
200 struct external_reloc
{
208 #define RELOC struct external_reloc
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
217 /* The ldhdr structure. This appears at the start of the .loader
220 struct external_ldhdr
222 bfd_byte l_version
[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];
232 #define LDHDRSZ (8 * 4)
234 struct external_ldsym
238 bfd_byte _l_name
[SYMNMLEN
];
241 bfd_byte _l_zeroes
[4];
242 bfd_byte _l_offset
[4];
247 bfd_byte l_smtype
[1];
248 bfd_byte l_smclas
[1];
253 #define LDSYMSZ (8 + 3 * 4 + 2 + 2)
255 struct external_ldrel
258 bfd_byte l_symndx
[4];
260 bfd_byte l_rsecnm
[2];
263 #define LDRELSZ (2 * 4 + 2 * 2)
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