1 /* IBM RS/6000 "XCOFF" file definitions for BFD.
2 Copyright (C) 1990, 1991 Free Software Foundation, Inc.
3 Written by Mimi Phûông-Thåo Võ and John Gilmore.
4 Contributed by IBM Corporation and 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
28 #define FILHSZ sizeof(FILHDR)
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];
45 unsigned char o_snentry
[2];
46 unsigned char o_sntext
[2];
47 unsigned char o_sndata
[2];
48 unsigned char o_sntoc
[2];
49 unsigned char o_snloader
[2];
50 unsigned char o_snbss
[2];
51 unsigned char o_algntext
[2];
52 unsigned char o_algndata
[2];
53 unsigned char o_modtype
[2];
54 unsigned char o_resv1
[2];
55 unsigned char o_maxstack
[4];
56 unsigned char o_resv2
[16];
60 #define AOUTSZ (sizeof(AOUTHDR))
62 #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */
63 #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */
64 #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */
67 /********************** SECTION HEADER **********************/
70 struct external_scnhdr
{
71 char s_name
[8]; /* section name */
72 char s_paddr
[4]; /* physical address, aliased s_nlib */
73 char s_vaddr
[4]; /* virtual address */
74 char s_size
[4]; /* section size */
75 char s_scnptr
[4]; /* file ptr to raw data for section */
76 char s_relptr
[4]; /* file ptr to relocation */
77 char s_lnnoptr
[4]; /* file ptr to line numbers */
78 char s_nreloc
[2]; /* number of relocation entries */
79 char s_nlnno
[2]; /* number of line number entries*/
80 char s_flags
[4]; /* flags */
84 * names of "special" sections
91 #define SCNHDR struct external_scnhdr
92 #define SCNHSZ sizeof(SCNHDR)
95 /********************** LINE NUMBERS **********************/
97 /* 1 line number entry for every "breakpointable" source line in a section.
98 * Line numbers are grouped on a per function basis; first entry in a function
99 * grouping will have l_lnno = 0 and in place of physical address will be the
100 * symbol table index of the function name.
102 struct external_lineno
{
104 char l_symndx
[4]; /* function name symbol index, iff l_lnno == 0*/
105 char l_paddr
[4]; /* (physical) address of line number */
107 char l_lnno
[2]; /* line number */
111 #define LINENO struct external_lineno
112 #define LINESZ sizeof(LINENO)
115 /********************** SYMBOLS **********************/
117 #define E_SYMNMLEN 8 /* # characters in a symbol name */
118 #define E_FILNMLEN 14 /* # characters in a file name */
119 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
121 struct external_syment
124 char e_name
[E_SYMNMLEN
];
139 #define N_BTMASK (017)
140 #define N_TMASK (060)
145 union external_auxent
{
147 char x_tagndx
[4]; /* str, un, or enum tag indx */
150 char x_lnno
[2]; /* declaration line number */
151 char x_size
[2]; /* str/union/array size */
153 char x_fsize
[4]; /* size of function */
156 struct { /* if ISFCN, tag, or .bb */
157 char x_lnnoptr
[4]; /* ptr to fcn line # */
158 char x_endndx
[4]; /* entry ndx past block end */
160 struct { /* if ISARY, up to 4 dimen. */
161 char x_dimen
[E_DIMNUM
][2];
164 char x_tvndx
[2]; /* tv index */
168 char x_fname
[E_FILNMLEN
];
176 char x_scnlen
[4]; /* section length */
177 char x_nreloc
[2]; /* # relocation entries */
178 char x_nlinno
[2]; /* # line numbers */
182 char x_tvfill
[4]; /* tv fill value */
183 char x_tvlen
[2]; /* length of .tv */
184 char x_tvran
[2][2]; /* tv range */
185 } x_tv
; /* info about .tv section (in auxent of symbol .tv)) */
188 unsigned char x_scnlen
[4];
189 unsigned char x_parmhash
[4];
190 unsigned char x_snhash
[2];
191 unsigned char x_smtyp
[1];
192 unsigned char x_smclas
[1];
193 unsigned char x_stab
[4];
194 unsigned char x_snstab
[2];
199 #define SYMENT struct external_syment
201 #define AUXENT union external_auxent
203 #define DBXMASK 0x80 /* for dbx storage mask */
204 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
208 /********************** RELOCATION DIRECTIVES **********************/
211 struct external_reloc
{
219 #define RELOC struct external_reloc
222 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
223 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
224 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
225 /* For new sections we havn't heard of before */
226 #define DEFAULT_SECTION_ALIGNMENT 4
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