Commit | Line | Data |
---|---|---|
7f6d05e8 CP |
1 | /* IBM RS/6000 "XCOFF64" file definitions for BFD. |
2 | Copyright (C) 2000 Free Software Foundation, Inc. */ | |
3 | ||
4 | /********************** FILE HEADER **********************/ | |
5 | ||
6 | struct external_filehdr { | |
7 | char f_magic[2]; /* magic number */ | |
8 | char f_nscns[2]; /* number of sections */ | |
9 | char f_timdat[4]; /* time & date stamp */ | |
10 | char f_symptr[8];/* file pointer to symtab */ | |
11 | char f_opthdr[2]; /* sizeof(optional hdr) */ | |
12 | char f_flags[2]; /* flags */ | |
13 | char f_nsyms[4]; /* number of symtab entries */ | |
14 | }; | |
15 | ||
16 | /* IBM RS/6000 */ | |
c6664dfb | 17 | #define U803XTOCMAGIC 0757 /* readonly text segments and TOC, XCOFF64 */ |
7f6d05e8 | 18 | |
c6664dfb | 19 | #define BADMAG(x) ((x).f_magic != U803XTOCMAGIC) |
7f6d05e8 CP |
20 | |
21 | #define FILHDR struct external_filehdr | |
22 | #define FILHSZ 24 | |
23 | ||
24 | /********************** AOUT "OPTIONAL HEADER" **********************/ | |
25 | ||
26 | ||
27 | typedef struct | |
28 | { | |
29 | unsigned char magic[2]; /* type of file */ | |
30 | unsigned char vstamp[2]; /* version stamp */ | |
31 | unsigned char o_debugger[4]; /* reserved */ | |
32 | unsigned char text_start[8]; /* base of text used for this file */ | |
33 | unsigned char data_start[8]; /* base of data used for this file */ | |
34 | unsigned char o_toc[8]; /* address of TOC */ | |
35 | unsigned char o_snentry[2]; /* section number of entry point */ | |
36 | unsigned char o_sntext[2]; /* section number of .text section */ | |
37 | unsigned char o_sndata[2]; /* section number of .data section */ | |
38 | unsigned char o_sntoc[2]; /* section number of TOC */ | |
39 | unsigned char o_snloader[2]; /* section number of .loader section */ | |
40 | unsigned char o_snbss[2]; /* section number of .bss section */ | |
41 | unsigned char o_algntext[2]; /* .text alignment */ | |
42 | unsigned char o_algndata[2]; /* .data alignment */ | |
43 | unsigned char o_modtype[2]; /* module type (??) */ | |
44 | unsigned char o_cputype[2]; /* cpu type */ | |
45 | unsigned char o_resv2[4]; /* reserved */ | |
46 | unsigned char tsize[8]; /* text size bytes, padded to FW bdry */ | |
47 | unsigned char dsize[8]; /* initialized data " " */ | |
48 | unsigned char bsize[8]; /* uninitialized data " " */ | |
49 | unsigned char entry[8]; /* entry pt. */ | |
50 | unsigned char o_maxstack[8]; /* max stack size (??) */ | |
51 | unsigned char o_maxdata[8]; /* max data size (??) */ | |
c6664dfb | 52 | unsigned char o_resv3[16]; /* reserved */ |
7f6d05e8 CP |
53 | } |
54 | AOUTHDR; | |
55 | ||
c6664dfb | 56 | #define AOUTSZ 120 |
7f6d05e8 CP |
57 | #define SMALL_AOUTSZ (0) |
58 | #define AOUTHDRSZ 72 | |
59 | ||
60 | #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */ | |
61 | #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */ | |
62 | #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */ | |
63 | ||
64 | ||
65 | /********************** SECTION HEADER **********************/ | |
66 | ||
67 | ||
68 | struct external_scnhdr { | |
69 | char s_name[8]; /* section name */ | |
70 | char s_paddr[8]; /* physical address, aliased s_nlib */ | |
71 | char s_vaddr[8]; /* virtual address */ | |
72 | char s_size[8]; /* section size */ | |
73 | char s_scnptr[8]; /* file ptr to raw data for section */ | |
74 | char s_relptr[8]; /* file ptr to relocation */ | |
75 | char s_lnnoptr[8]; /* file ptr to line numbers */ | |
76 | char s_nreloc[4]; /* number of relocation entries */ | |
77 | char s_nlnno[4]; /* number of line number entries*/ | |
78 | char s_flags[4]; /* flags */ | |
79 | char s_pad[4]; /* padding */ | |
80 | }; | |
81 | ||
82 | /* | |
83 | * names of "special" sections | |
84 | */ | |
85 | #define _TEXT ".text" | |
86 | #define _DATA ".data" | |
87 | #define _BSS ".bss" | |
88 | #define _PAD ".pad" | |
89 | #define _LOADER ".loader" | |
90 | ||
91 | #define SCNHDR struct external_scnhdr | |
92 | ||
93 | #define SCNHSZ 72 | |
94 | ||
95 | /* XCOFF uses a special .loader section with type STYP_LOADER. */ | |
96 | #define STYP_LOADER 0x1000 | |
97 | ||
98 | /* XCOFF uses a special .debug section with type STYP_DEBUG. */ | |
99 | #define STYP_DEBUG 0x2000 | |
100 | ||
101 | /* XCOFF handles line number or relocation overflow by creating | |
102 | another section header with STYP_OVRFLO set. */ | |
103 | #define STYP_OVRFLO 0x8000 | |
104 | ||
105 | /********************** LINE NUMBERS **********************/ | |
106 | ||
107 | /* 1 line number entry for every "breakpointable" source line in a section. | |
108 | * Line numbers are grouped on a per function basis; first entry in a function | |
109 | * grouping will have l_lnno = 0 and in place of physical address will be the | |
110 | * symbol table index of the function name. | |
111 | */ | |
112 | struct external_lineno { | |
113 | union { | |
114 | char l_symndx[8];/* function name symbol index, iff l_lnno == 0*/ | |
115 | char l_paddr[8]; /* (physical) address of line number */ | |
116 | } l_addr; | |
117 | char l_lnno[4]; /* line number */ | |
118 | }; | |
119 | ||
120 | ||
121 | #define LINENO struct external_lineno | |
122 | ||
123 | #define LINESZ 12 | |
124 | ||
125 | ||
126 | /********************** SYMBOLS **********************/ | |
127 | ||
128 | #define E_SYMNMLEN 8 /* # characters in a symbol name */ | |
129 | #define E_FILNMLEN 14 /* # characters in a file name */ | |
130 | #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ | |
131 | ||
132 | struct external_syment | |
133 | { | |
134 | union { | |
135 | char e_value[8]; | |
136 | } e; | |
137 | char e_offset[4]; | |
138 | char e_scnum[2]; | |
139 | char e_type[2]; | |
140 | char e_sclass[1]; | |
141 | char e_numaux[1]; | |
142 | }; | |
143 | ||
144 | ||
145 | ||
146 | #define N_BTMASK (017) | |
147 | #define N_TMASK (060) | |
148 | #define N_BTSHFT (4) | |
149 | #define N_TSHIFT (2) | |
150 | ||
151 | ||
152 | union external_auxent { | |
153 | ||
154 | struct { | |
155 | union { | |
156 | struct { | |
157 | char x_lnno[4]; /* declaration line number */ | |
158 | char x_size[2]; /* str/union/array size */ | |
159 | } x_lnsz; | |
160 | struct { | |
161 | char x_lnnoptr[8];/* ptr to fcn line */ | |
162 | char x_fsize[4]; /* size of function */ | |
163 | char x_endndx[4]; /* entry ndx past block end */ | |
164 | } x_fcn; | |
165 | } x_fcnary; | |
166 | } x_sym; | |
167 | ||
168 | union { | |
169 | char x_fname[E_FILNMLEN]; | |
170 | struct { | |
171 | char x_zeroes[4]; | |
172 | char x_offset[4]; | |
173 | char x_pad[6]; | |
174 | unsigned char x_ftype[1]; | |
175 | unsigned char x_resv[2]; | |
176 | } x_n; | |
177 | } x_file; | |
178 | ||
179 | struct { | |
180 | char x_exptr[8]; | |
181 | char x_fsize[4]; | |
182 | char x_endndx[4]; | |
183 | char x_pad[1]; | |
184 | } x_except; | |
185 | ||
186 | struct { | |
187 | unsigned char x_scnlen_lo[4]; | |
188 | unsigned char x_parmhash[4]; | |
189 | unsigned char x_snhash[2]; | |
190 | unsigned char x_smtyp[1]; | |
191 | unsigned char x_smclas[1]; | |
192 | unsigned char x_scnlen_hi[4]; | |
193 | unsigned char x_pad[1]; | |
194 | } x_csect; | |
195 | ||
196 | struct { | |
197 | char x_pad[17]; | |
198 | char x_auxtype[1]; | |
199 | } x_auxtype; | |
200 | }; | |
201 | ||
202 | #define SYMENT struct external_syment | |
203 | #define SYMESZ 18 | |
204 | #define AUXENT union external_auxent | |
205 | #define AUXESZ 18 | |
206 | #define DBXMASK 0x80 /* for dbx storage mask */ | |
207 | #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) | |
208 | ||
209 | /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h */ | |
210 | #define _AUX_EXCEPT 255 | |
211 | #define _AUX_FCN 254 | |
212 | #define _AUX_SYM 253 | |
213 | #define _AUX_FILE 252 | |
214 | #define _AUX_CSECT 251 | |
215 | ||
216 | ||
217 | ||
218 | /********************** RELOCATION DIRECTIVES **********************/ | |
219 | ||
220 | ||
221 | struct external_reloc { | |
222 | char r_vaddr[8]; | |
223 | char r_symndx[4]; | |
224 | char r_size[1]; | |
225 | char r_type[1]; | |
226 | }; | |
227 | ||
228 | ||
229 | #define RELOC struct external_reloc | |
230 | #define RELSZ 14 | |
231 | ||
232 | #define DEFAULT_DATA_SECTION_ALIGNMENT 4 | |
233 | #define DEFAULT_BSS_SECTION_ALIGNMENT 4 | |
234 | #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 | |
235 | /* For new sections we havn't heard of before */ | |
236 | #define DEFAULT_SECTION_ALIGNMENT 4 |