source: trunk/libs/newlib/src/include/coff/i960.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: 8.4 KB
Line 
1/* coff information for 80960.  Origins: Intel corp, natch.
2   
3   Copyright 2001, 2010 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9   
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14   
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software
17   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
18   MA 02110-1301, USA.  */
19
20/* NOTE: Tagentries (cf TAGBITS) are no longer used by the 960 */
21
22/********************** FILE HEADER **********************/
23
24struct external_filehdr
25{
26  char f_magic[2];      /* magic number                 */
27  char f_nscns[2];      /* number of sections           */
28  char f_timdat[4];     /* time & date stamp            */
29  char f_symptr[4];     /* file pointer to symtab       */
30  char f_nsyms[4];      /* number of symtab entries     */
31  char f_opthdr[2];     /* sizeof(optional hdr)         */
32  char f_flags[2];      /* flags                        */
33};
34
35#define OMAGIC      (0407)      /* old impure format. data immediately
36                                   follows text. both sections are rw. */
37#define NMAGIC      (0410)      /* split i&d, read-only text */
38
39/*
40*       Intel 80960 (I960) processor flags.
41*       F_I960TYPE == mask for processor type field.
42*/
43
44#define F_I960TYPE      (0xf000)
45#define F_I960CORE      (0x1000)
46#define F_I960KB        (0x2000)
47#define F_I960SB        (0x2000)
48#define F_I960MC        (0x3000)
49#define F_I960XA        (0x4000)
50#define F_I960CA        (0x5000)
51#define F_I960KA        (0x6000)
52#define F_I960SA        (0x6000)
53#define F_I960JX        (0x7000)
54#define F_I960HX        (0x8000)
55
56
57/** i80960 Magic Numbers
58*/
59
60#define I960ROMAGIC     (0x160) /* read-only text segments */
61#define I960RWMAGIC     (0x161) /* read-write text segments */
62
63#define I960BADMAG(x) (((x).f_magic!=I960ROMAGIC) && ((x).f_magic!=I960RWMAGIC))
64
65#define FILHDR  struct external_filehdr
66#define FILHSZ  20
67
68/********************** AOUT "OPTIONAL HEADER" **********************/
69
70typedef struct
71{
72  unsigned long phys_addr;
73  unsigned long bitarray;
74} TAGBITS;
75
76typedef struct 
77{
78  char  magic[2];               /* type of file                         */
79  char  vstamp[2];              /* version stamp                        */
80  char  tsize[4];               /* text size in bytes, padded to FW bdry*/
81  char  dsize[4];               /* initialized data "  "                */
82  char  bsize[4];               /* uninitialized data "   "             */
83  char  entry[4];               /* entry pt.                            */
84  char  text_start[4];          /* base of text used for this file */
85  char  data_start[4];          /* base of data used for this file */
86  char  tagentries[4];          /* number of tag entries to follow */
87}
88AOUTHDR;
89
90/* return a pointer to the tag bits array */
91
92#define TAGPTR(aout) ((TAGBITS *) (&(aout.tagentries)+1))
93
94/* compute size of a header */
95
96/*#define AOUTSZ(aout) (sizeof(AOUTHDR)+(aout.tagentries*sizeof(TAGBITS)))*/
97#define AOUTSZ 32
98#define AOUTHDRSZ 32
99
100
101/********************** SECTION HEADER **********************/
102
103struct external_scnhdr
104{
105  char          s_name[8];      /* section name                 */
106  char          s_paddr[4];     /* physical address, aliased s_nlib */
107  char          s_vaddr[4];     /* virtual address              */
108  char          s_size[4];      /* section size                 */
109  char          s_scnptr[4];    /* file ptr to raw data for section */
110  char          s_relptr[4];    /* file ptr to relocation       */
111  char          s_lnnoptr[4];   /* file ptr to line numbers     */
112  char          s_nreloc[2];    /* number of relocation entries */
113  char          s_nlnno[2];     /* number of line number entries*/
114  char          s_flags[4];     /* flags                        */
115  char          s_align[4];     /* section alignment            */
116};
117
118
119#define SCNHDR  struct external_scnhdr
120#define SCNHSZ  44
121
122/*
123 * names of "special" sections
124 */
125#define _TEXT   ".text"
126#define _DATA   ".data"
127#define _BSS    ".bss"
128
129/********************** LINE NUMBERS **********************/
130
131/* 1 line number entry for every "breakpointable" source line in a section.
132 * Line numbers are grouped on a per function basis; first entry in a function
133 * grouping will have l_lnno = 0 and in place of physical address will be the
134 * symbol table index of the function name.
135 */
136struct external_lineno
137{
138  union
139  {
140    char l_symndx[4];   /* function name symbol index, iff l_lnno == 0*/
141    char l_paddr[4];    /* (physical) address of line number    */
142  } l_addr;
143
144  char l_lnno[2];               /* line number          */
145  char padding[2];      /* force alignment      */
146};
147
148
149#define LINENO  struct external_lineno
150#define LINESZ  8
151
152/********************** SYMBOLS **********************/
153
154#define E_SYMNMLEN      8       /* # characters in a symbol name        */
155#define E_FILNMLEN      14      /* # characters in a file name          */
156#define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
157
158struct external_syment
159{
160  union
161  {
162    char e_name[E_SYMNMLEN];
163
164    struct
165    {
166      char e_zeroes[4];
167      char e_offset[4];
168    } e;
169  } e;
170
171  char e_value[4];
172  char e_scnum[2];
173  char e_flags[2];
174  char e_type[4];
175  char e_sclass[1];
176  char e_numaux[1];
177  char pad2[2];
178};
179
180#define N_BTMASK        (0x1f)
181#define N_TMASK         (0x60)
182#define N_BTSHFT        (5)
183#define N_TSHIFT        (2)
184 
185union external_auxent
186{
187  struct
188  {
189    char x_tagndx[4];   /* str, un, or enum tag indx */
190
191    union
192    {
193      struct
194      {
195        char  x_lnno[2]; /* declaration line number */
196        char  x_size[2]; /* str/union/array size */
197      } x_lnsz;
198
199      char x_fsize[4];  /* size of function */
200
201    } x_misc;
202
203    union
204    {
205      struct            /* if ISFCN, tag, or .bb */
206      {
207        char x_lnnoptr[4];      /* ptr to fcn line # */
208        char x_endndx[4];       /* entry ndx past block end */
209      } x_fcn;
210
211      struct            /* if ISARY, up to 4 dimen. */
212      {
213        char x_dimen[E_DIMNUM][2];
214      } x_ary;
215
216    } x_fcnary;
217
218    char x_tvndx[2];            /* tv index */
219
220  } x_sym;
221
222  union
223  {
224    char x_fname[E_FILNMLEN];
225
226    struct
227    {
228      char x_zeroes[4];
229      char x_offset[4];
230    } x_n;
231
232  } x_file;
233
234  struct
235  {
236    char x_scnlen[4];                   /* section length */
237    char x_nreloc[2];   /* # relocation entries */
238    char x_nlinno[2];   /* # line numbers */
239
240  } x_scn;
241
242  struct
243  {
244    char x_tvfill[4];   /* tv fill value */
245    char x_tvlen[2];    /* length of .tv */
246    char x_tvran[2][2]; /* tv range */
247
248  } x_tv;               /* info about .tv section (in auxent of symbol .tv)) */
249
250  /******************************************
251   *  I960-specific *2nd* aux. entry formats
252   ******************************************/
253  struct
254  {
255    /* This is a very old typo that keeps getting propagated. */
256#define x_stdindx x_stindx
257    char x_stindx[4];   /* sys. table entry */
258  } x_sc;       /* system call entry */
259
260  struct
261  {
262    char x_balntry[4]; /* BAL entry point */
263  } x_bal; /* BAL-callable function */
264
265  struct
266  {
267    char x_timestamp[4];                /* time stamp */
268    char        x_idstring[20];         /* producer identity string */
269
270  } x_ident;                            /* Producer ident info */
271};
272
273#define SYMENT  struct external_syment
274#define SYMESZ  24
275#define AUXENT  union external_auxent
276#define AUXESZ  24
277
278#       define _ETEXT   "_etext"
279
280/********************** RELOCATION DIRECTIVES **********************/
281
282struct external_reloc
283{
284  char r_vaddr[4];
285  char r_symndx[4];
286  char r_type[2];
287  char pad[2];
288};
289
290/* r_type values for the i960.  */
291
292/* The i960 uses R_RELLONG, which is defined in internal.h as 0x11.
293   It is an absolute 32 bit relocation.  */
294
295#define R_IPRMED        (0x19)  /* 24-bit ip-relative relocation */
296#define R_OPTCALL       (0x1b)  /* 32-bit optimizable call (leafproc/sysproc) */
297#define R_OPTCALLX      (0x1c)  /* 64-bit optimizable call (leafproc/sysproc) */
298
299/* The following relocation types are defined use by relaxing linkers,
300   which convert 32 bit calls (which require a 64 bit instruction)
301   into 24 bit calls (which require a 32 bit instruction) when
302   possible.  It will be possible whenever the target of the call is
303   within a 24 bit range of the call instruction.
304
305   It is always safe to ignore these relocations.  They only serve to
306   mark points which the relaxing linker will have to consider.  The
307   assembler must ensure that the correct code is generated even if
308   the relocations are ignored.  In particular, this means that the
309   R_IPR13 relocation may not appear with an external symbol.  */
310
311#define R_IPR13         (0x1d)  /* 13 bit ip-relative branch */
312#define R_ALIGN         (0x1e)  /* alignment marker.  This has no
313                                   associated symbol.  Instead, the
314                                   r_symndx field indicates the
315                                   require alignment at this point in
316                                   the file.  It must be a power of 2.  */
317
318#define RELOC struct external_reloc
319#define RELSZ 12
320
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