Eliminate ARCH_NUM_REGS.
[deliverable/binutils-gdb.git] / include / coff / rs6k64.h
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1/* IBM RS/6000 "XCOFF64" file definitions for BFD.
2 Copyright (C) 2000 Free Software Foundation, Inc. */
3
4/********************** FILE HEADER **********************/
5
6struct 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)
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20
21#define FILHDR struct external_filehdr
22#define FILHSZ 24
23
24/********************** AOUT "OPTIONAL HEADER" **********************/
25
26
27typedef 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 */
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53}
54AOUTHDR;
55
c6664dfb 56#define AOUTSZ 120
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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
68struct 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 */
112struct 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
132struct 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
152union 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
221struct 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
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