source: trunk/libs/newlib/src/include/coff/rs6k64.h @ 666

Last change on this file since 666 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
File size: 7.5 KB
Line 
1/* IBM RS/6000 "XCOFF64" file definitions for BFD.
2   Copyright (C) 2000, 2001, 2002, 2010 Free Software Foundation, Inc. 
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 3 of the License, or
7   (at your option) any later version.
8   
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13   
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software
16   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
17   MA 02110-1301, USA.  */
18
19/********************** FILE HEADER **********************/
20
21struct external_filehdr
22{
23  char f_magic[2];      /* magic number                 */
24  char f_nscns[2];      /* number of sections           */
25  char f_timdat[4];     /* time & date stamp            */
26  char f_symptr[8];     /* file pointer to symtab       */
27  char f_opthdr[2];     /* sizeof(optional hdr)         */
28  char f_flags[2];      /* flags                        */
29  char f_nsyms[4];      /* number of symtab entries     */
30};
31
32/* IBM RS/6000.  */
33#define U803XTOCMAGIC 0757      /* Aix 4.3 64-bit XCOFF */
34#define U64_TOCMAGIC  0767      /* AIX 5+ 64-bit XCOFF */
35#define BADMAG(x) ((x).f_magic != U803XTOCMAGIC && (x).f_magic != U64_TOCMAGIC)
36
37#define FILHDR  struct external_filehdr
38#define FILHSZ  24
39
40/********************** AOUT "OPTIONAL HEADER" **********************/
41
42typedef struct 
43{
44  unsigned char magic[2];               /* type of file                 */
45  unsigned char vstamp[2];              /* version stamp                */
46  unsigned char o_debugger[4];          /* reserved                     */
47  unsigned char text_start[8];          /* base of text used for this file */
48  unsigned char data_start[8];          /* base of data used for this file */
49  unsigned char o_toc[8];               /* address of TOC */
50  unsigned char o_snentry[2];           /* section number of entry point */
51  unsigned char o_sntext[2];            /* section number of .text section */
52  unsigned char o_sndata[2];            /* section number of .data section */
53  unsigned char o_sntoc[2];             /* section number of TOC */
54  unsigned char o_snloader[2];          /* section number of .loader section */
55  unsigned char o_snbss[2];             /* section number of .bss section */
56  unsigned char o_algntext[2];          /* .text alignment */
57  unsigned char o_algndata[2];          /* .data alignment */
58  unsigned char o_modtype[2];           /* module type (??) */
59  unsigned char o_cputype[2];           /* cpu type */
60  unsigned char o_resv2[4];             /* reserved                     */
61  unsigned char tsize[8];               /* text size bytes, padded to FW bdry */
62  unsigned char dsize[8];               /* initialized data "  "        */
63  unsigned char bsize[8];               /* uninitialized data "   "     */
64  unsigned char entry[8];               /* entry pt.                    */
65  unsigned char o_maxstack[8];          /* max stack size (??)          */
66  unsigned char o_maxdata[8];           /* max data size (??)           */
67  unsigned char o_resv3[16];            /* reserved                     */
68}
69AOUTHDR;
70
71#define AOUTSZ 120
72#define SMALL_AOUTSZ (0)
73#define AOUTHDRSZ 72
74
75/********************** SECTION HEADER **********************/
76
77struct external_scnhdr
78{
79  char  s_name[8];      /* section name                 */
80  char  s_paddr[8];     /* physical address, aliased s_nlib */
81  char  s_vaddr[8];     /* virtual address              */
82  char  s_size[8];      /* section size                 */
83  char  s_scnptr[8];    /* file ptr to raw data for section */
84  char  s_relptr[8];    /* file ptr to relocation       */
85  char  s_lnnoptr[8];   /* file ptr to line numbers     */
86  char  s_nreloc[4];    /* number of relocation entries */
87  char  s_nlnno[4];     /* number of line number entries*/
88  char  s_flags[4];     /* flags                        */
89  char  s_pad[4];       /* padding */ 
90};
91
92#define SCNHDR  struct external_scnhdr
93
94#define SCNHSZ  72
95
96/********************** LINE NUMBERS **********************/
97
98/* 1 line number entry for every "breakpointable" source line in a section.
99   Line numbers are grouped on a per function basis; first entry in a function
100   grouping will have l_lnno = 0 and in place of physical address will be the
101   symbol table index of the function name.  */
102
103struct external_lineno
104{
105  union
106  {
107    char l_symndx[4];   /* function name symbol index, iff l_lnno == 0*/
108    char l_paddr[8];    /* (physical) address of line number    */
109  } l_addr;
110
111  char l_lnno[4];       /* line number          */
112};
113
114#define LINENO  struct external_lineno
115
116#define LINESZ  12
117
118/********************** SYMBOLS **********************/
119
120#define E_SYMNMLEN      8       /* # characters in a symbol name        */
121#define E_FILNMLEN      14      /* # characters in a file name          */
122#define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
123
124struct external_syment
125{
126  char e_value[8];
127  char e_offset[4];
128  char e_scnum[2];
129  char e_type[2];
130  char e_sclass[1];
131  char e_numaux[1];
132};
133
134#define N_BTMASK        (017)
135#define N_TMASK         (060)
136#define N_BTSHFT        (4)
137#define N_TSHIFT        (2)
138
139union external_auxent
140{
141    struct {
142        union {
143            struct {
144                char x_lnno[4];         /* declaration line number */
145                char x_size[2];         /* str/union/array size */
146            } x_lnsz;
147            struct {
148                char x_lnnoptr[8];/* ptr to fcn line */
149                char x_fsize[4];         /* size of function */
150                char x_endndx[4];        /* entry ndx past block end */
151            } x_fcn;
152        } x_fcnary;
153    } x_sym;
154         
155    struct {
156        union {
157            char x_fname[E_FILNMLEN];
158            struct {
159                char x_zeroes[4];
160                char x_offset[4];
161                char x_pad[6];
162            } x_n;
163        } x_n;
164        unsigned char x_ftype[1];
165        unsigned char x_resv[2];
166    } x_file;
167
168    struct {
169        char x_exptr[8];
170        char x_fsize[4];
171        char x_endndx[4];
172        char x_pad[1];
173    } x_except;
174
175    struct {
176            unsigned char x_scnlen_lo[4];
177            unsigned char x_parmhash[4];
178            unsigned char x_snhash[2];
179            unsigned char x_smtyp[1];
180            unsigned char x_smclas[1];
181            unsigned char x_scnlen_hi[4];
182            unsigned char x_pad[1];
183    } x_csect; 
184
185    struct {
186        char x_pad[17];
187        char x_auxtype[1];
188    } x_auxtype;
189};
190
191#define SYMENT  struct external_syment
192#define SYMESZ  18     
193#define AUXENT  union external_auxent
194#define AUXESZ  18
195#define DBXMASK 0x80            /* for dbx storage mask */
196#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
197
198/* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h.  */
199#define _AUX_EXCEPT     255
200#define _AUX_FCN        254
201#define _AUX_SYM        253
202#define _AUX_FILE       252
203#define _AUX_CSECT      251
204
205/********************** RELOCATION DIRECTIVES **********************/
206
207struct external_reloc
208{
209  char r_vaddr[8];
210  char r_symndx[4];
211  char r_size[1];
212  char r_type[1];
213};
214
215#define RELOC struct external_reloc
216#define RELSZ 14
217
218#define DEFAULT_DATA_SECTION_ALIGNMENT 4
219#define DEFAULT_BSS_SECTION_ALIGNMENT 4
220#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
221/* For new sections we havn't heard of before */
222#define DEFAULT_SECTION_ALIGNMENT 4
223
224/* The ldhdr structure.  This appears at the start of the .loader
225   section.  */
226
227struct external_ldhdr
228{
229  bfd_byte l_version[4];
230  bfd_byte l_nsyms[4];
231  bfd_byte l_nreloc[4];
232  bfd_byte l_istlen[4];
233  bfd_byte l_nimpid[4];
234  bfd_byte l_stlen[4];
235  bfd_byte l_impoff[8];
236  bfd_byte l_stoff[8];
237  bfd_byte l_symoff[8];
238  bfd_byte l_rldoff[8];
239};
240#define LDHDRSZ (56)
241
242struct external_ldsym
243{
244  bfd_byte l_value[8];
245  bfd_byte l_offset[4];
246  bfd_byte l_scnum[2];
247  bfd_byte l_smtype[1];
248  bfd_byte l_smclas[1];
249  bfd_byte l_ifile[4];
250  bfd_byte l_parm[4];
251};
252
253#define LDSYMSZ (24)
254
255struct external_ldrel
256{
257  bfd_byte l_vaddr[8];
258  bfd_byte l_rtype[2];
259  bfd_byte l_rsecnm[2];
260  bfd_byte l_symndx[4];
261};
262
263#define LDRELSZ (16)
264
265struct external_exceptab
266{
267  union {
268    bfd_byte e_symndx[4];
269    bfd_byte e_paddr[8];
270  } e_addr;
271  bfd_byte e_lang[1];
272  bfd_byte e_reason[1];
273};
274
275#define EXCEPTSZ (10)
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