1 /* Internal format of COFF object file data structures, for GNU BFD.
2 This file is part of BFD, the Binary File Descriptor library. */
4 /* First, make "signed char" work, even on old compilers. */
11 /********************** FILE HEADER **********************/
12 struct internal_filehdr
14 unsigned short f_magic
; /* magic number */
15 unsigned short f_nscns
; /* number of sections */
16 long f_timdat
; /* time & date stamp */
17 long f_symptr
; /* file pointer to symtab */
18 long f_nsyms
; /* number of symtab entries */
19 unsigned short f_opthdr
; /* sizeof(optional hdr) */
20 unsigned short f_flags
; /* flags */
24 * F_RELFLG relocation info stripped from file
25 * F_EXEC file is executable (no unresolved external references)
26 * F_LNNO line numbers stripped from file
27 * F_LSYMS local symbols stripped from file
28 * F_AR16WR file is 16-bit little-endian
29 * F_AR32WR file is 32-bit little-endian
30 * F_AR32W file is 32-bit big-endian
31 * F_DYNLOAD rs/6000 aix: dynamically loadable w/imports & exports
32 * F_SHROBJ rs/6000 aix: file is a shared object
35 #define F_RELFLG (0x0001)
36 #define F_EXEC (0x0002)
37 #define F_LNNO (0x0004)
38 #define F_LSYMS (0x0008)
39 #define F_AR16WR (0x0080)
40 #define F_AR32WR (0x0100)
41 #define F_AR32W (0x0200)
42 #define F_DYNLOAD (0x1000)
43 #define F_SHROBJ (0x2000)
45 /********************** AOUT "OPTIONAL HEADER" **********************/
46 struct internal_aouthdr
{
47 short magic
; /* type of file */
48 short vstamp
; /* version stamp */
49 unsigned long tsize
; /* text size in bytes, padded to FW bdry*/
50 unsigned long dsize
; /* initialized data " " */
51 unsigned long bsize
; /* uninitialized data " " */
52 unsigned long entry
; /* entry pt. */
53 unsigned long text_start
; /* base of text used for this file */
54 unsigned long data_start
; /* base of data used for this file */
57 unsigned long tagentries
; /* number of tag entries to follow */
60 unsigned long o_toc
; /* address of TOC */
61 short o_snentry
; /* section number for entry point */
62 short o_sntext
; /* section number for text */
63 short o_sndata
; /* section number for data */
64 short o_sntoc
; /* section number for toc */
65 short o_snloader
; /* section number for loader section */
66 short o_snbss
; /* section number for bss */
67 short o_algntext
; /* max alignment for text */
68 short o_algndata
; /* max alignment for data */
69 short o_modtype
; /* Module type field, 1R,RE,RO */
70 unsigned long o_maxstack
; /* max stack size allowed. */
73 /********************** STORAGE CLASSES **********************/
75 #define C_EFCN -1 /* physical end of function */
77 #define C_AUTO 1 /* automatic variable */
78 #define C_EXT 2 /* external symbol */
79 #define C_STAT 3 /* static */
80 #define C_REG 4 /* register variable */
81 #define C_EXTDEF 5 /* external definition */
82 #define C_LABEL 6 /* label */
83 #define C_ULABEL 7 /* undefined label */
84 #define C_MOS 8 /* member of structure */
85 #define C_ARG 9 /* function argument */
86 #define C_STRTAG 10 /* structure tag */
87 #define C_MOU 11 /* member of union */
88 #define C_UNTAG 12 /* union tag */
89 #define C_TPDEF 13 /* type definition */
90 #define C_USTATIC 14 /* undefined static */
91 #define C_ENTAG 15 /* enumeration tag */
92 #define C_MOE 16 /* member of enumeration */
93 #define C_REGPARM 17 /* register parameter */
94 #define C_FIELD 18 /* bit field */
95 #define C_AUTOARG 19 /* auto argument */
96 #define C_LASTENT 20 /* dummy entry (end of block) */
97 #define C_BLOCK 100 /* ".bb" or ".eb" */
98 #define C_FCN 101 /* ".bf" or ".ef" */
99 #define C_EOS 102 /* end of structure */
100 #define C_FILE 103 /* file name */
101 #define C_LINE 104 /* line # reformatted as symbol table entry */
102 #define C_ALIAS 105 /* duplicate tag */
103 #define C_HIDDEN 106 /* ext symbol in dmert public lib */
105 /* New storage classes for 80960 */
107 /* C_LEAFPROC is obsolete. Use C_LEAFEXT or C_LEAFSTAT */
108 #define C_LEAFPROC 108 /* Leaf procedure, "call" via BAL */
110 #define C_SCALL 107 /* Procedure reachable via system call */
111 #define C_LEAFEXT 108 /* External leaf */
112 #define C_LEAFSTAT 113 /* Static leaf */
113 #define C_OPTVAR 109 /* Optimized variable */
114 #define C_DEFINE 110 /* Preprocessor #define */
115 #define C_PRAGMA 111 /* Advice to compiler or linker */
116 #define C_SEGMENT 112 /* 80960 segment name */
118 /* New storage classes for RS/6000 */
119 #define C_HIDEXT 107 /* Un-named external symbol */
120 #define C_BINCL 108 /* Marks beginning of include file */
121 #define C_EINCL 109 /* Marks ending of include file */
123 /* storage classes for stab symbols for RS/6000 */
124 #define C_GSYM ((signed char)0x80)
125 #define C_LSYM ((signed char)0x81)
126 #define C_PSYM ((signed char)0x82)
127 #define C_RSYM ((signed char)0x83)
128 #define C_RPSYM ((signed char)0x84)
129 #define C_STSYM ((signed char)0x85)
130 #define C_TCSYM ((signed char)0x86)
131 #define C_BCOMM ((signed char)0x87)
132 #define C_ECOML ((signed char)0x88)
133 #define C_ECOMM ((signed char)0x89)
134 #define C_DECL ((signed char)0x8c)
135 #define C_ENTRY ((signed char)0x8d)
136 #define C_FUN ((signed char)0x8e)
137 #define C_BSTAT ((signed char)0x8f)
138 #define C_ESTAT ((signed char)0x90)
140 /********************** SECTION HEADER **********************/
141 struct internal_scnhdr
{
142 char s_name
[8]; /* section name */
143 long s_paddr
; /* physical address, aliased s_nlib */
144 long s_vaddr
; /* virtual address */
145 long s_size
; /* section size */
146 long s_scnptr
; /* file ptr to raw data for section */
147 long s_relptr
; /* file ptr to relocation */
148 long s_lnnoptr
; /* file ptr to line numbers */
149 unsigned long s_nreloc
; /* number of relocation entries */
150 unsigned long s_nlnno
; /* number of line number entries*/
151 long s_flags
; /* flags */
161 #define STYP_REG (0x0000) /* "regular": allocated, relocated, loaded */
162 #define STYP_DSECT (0x0001) /* "dummy": relocated only*/
163 #define STYP_NOLOAD (0x0002) /* "noload": allocated, relocated, not loaded */
164 #define STYP_GROUP (0x0004) /* "grouped": formed of input sections */
165 #define STYP_PAD (0x0008) /* "padding": not allocated, not relocated, loaded */
166 #define STYP_COPY (0x0010) /* "copy": for decision function used by field update; not allocated, not relocated,
167 loaded; reloc & lineno entries processed normally */
168 #define STYP_TEXT (0x0020) /* section contains text only */
169 #define S_SHRSEG (0x0020) /* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile
170 will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will
171 update all process invocations. */
172 #define STYP_DATA (0x0040) /* section contains data only */
173 #define STYP_BSS (0x0080) /* section contains bss only */
174 #define S_NEWFCN (0x0100) /* In a minimal file or an update file, a new function (as compared with a replaced function) */
175 #define STYP_INFO (0x0200) /* comment: not allocated not relocated, not loaded */
176 #define STYP_OVER (0x0400) /* overlay: relocated not allocated or loaded */
177 #define STYP_LIB (0x0800) /* for .lib: same as INFO */
178 #define STYP_MERGE (0x2000) /* merge section -- combines with text, data or bss sections only */
179 #define STYP_REVERSE_PAD (0x4000) /* section will be padded with no-op instructions wherever padding is necessary and there is a
180 word of contiguous bytes beginning on a word boundary. */
181 /********************** LINE NUMBERS **********************/
183 /* 1 line number entry for every "breakpointable" source line in a section.
184 * Line numbers are grouped on a per function basis; first entry in a function
185 * grouping will have l_lnno = 0 and in place of physical address will be the
186 * symbol table index of the function name.
189 struct internal_lineno
{
191 long l_symndx
; /* function name symbol index, iff l_lnno == 0*/
192 long l_paddr
; /* (physical) address of line number */
194 unsigned long l_lnno
; /* line number */
198 /********************** SYMBOLS **********************/
200 #define SYMNMLEN 8 /* # characters in a symbol name */
201 #define FILNMLEN 14 /* # characters in a file name */
202 #define DIMNUM 4 /* # array dimensions in auxiliary entry */
204 struct internal_syment
{
206 char _n_name
[SYMNMLEN
]; /* old COFF version */
208 long _n_zeroes
; /* new == 0 */
209 long _n_offset
; /* offset into string table */
211 char *_n_nptr
[2]; /* allows for overlaying */
213 long n_value
; /* value of symbol */
214 short n_scnum
; /* section number */
215 unsigned short n_flags
; /* copy of flags from filhdr */
216 unsigned short n_type
; /* type and derived type */
217 signed char n_sclass
; /* storage class */
218 char n_numaux
; /* number of aux. entries */
220 #define n_name _n._n_name
221 #define n_zeroes _n._n_n._n_zeroes
222 #define n_offset _n._n_n._n_offset
225 /* Relocatable symbols have number of the section in which they are defined,
226 or one of the following: */
228 #define N_UNDEF ((short)0) /* undefined symbol */
229 #define N_ABS ((short)-1) /* value of symbol is absolute */
230 #define N_DEBUG ((short)-2) /* debugging symbol -- value is meaningless */
231 #define N_TV ((short)-3) /* indicates symbol needs preload transfer vector */
232 #define P_TV ((short)-4) /* indicates symbol needs postload transfer vector*/
235 * Type of a symbol, in low N bits of the word
238 #define T_VOID 1 /* function argument (only used by compiler) */
239 #define T_CHAR 2 /* character */
240 #define T_SHORT 3 /* short integer */
241 #define T_INT 4 /* integer */
242 #define T_LONG 5 /* long integer */
243 #define T_FLOAT 6 /* floating point */
244 #define T_DOUBLE 7 /* double word */
245 #define T_STRUCT 8 /* structure */
246 #define T_UNION 9 /* union */
247 #define T_ENUM 10 /* enumeration */
248 #define T_MOE 11 /* member of enumeration*/
249 #define T_UCHAR 12 /* unsigned character */
250 #define T_USHORT 13 /* unsigned short */
251 #define T_UINT 14 /* unsigned integer */
252 #define T_ULONG 15 /* unsigned long */
253 #define T_LNGDBL 16 /* long double */
256 * derived types, in n_type
258 #define DT_NON (0) /* no derived type */
259 #define DT_PTR (1) /* pointer */
260 #define DT_FCN (2) /* function */
261 #define DT_ARY (3) /* array */
263 #define BTYPE(x) ((x) & N_BTMASK)
265 #define ISPTR(x) (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
266 #define ISFCN(x) (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
267 #define ISARY(x) (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
268 #define ISTAG(x) ((x)==C_STRTAG||(x)==C_UNTAG||(x)==C_ENTAG)
269 #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
272 union internal_auxent
277 long l
; /* str, un, or enum tag indx */
278 struct coff_ptr_struct
*p
;
283 unsigned short x_lnno
; /* declaration line number */
284 unsigned short x_size
; /* str/union/array size */
286 long x_fsize
; /* size of function */
290 struct { /* if ISFCN, tag, or .bb */
291 long x_lnnoptr
; /* ptr to fcn line # */
292 union { /* entry ndx past block end */
294 struct coff_ptr_struct
*p
;
298 struct { /* if ISARY, up to 4 dimen. */
299 unsigned short x_dimen
[DIMNUM
];
303 unsigned short x_tvndx
; /* tv index */
307 char x_fname
[FILNMLEN
];
315 long x_scnlen
; /* section length */
316 unsigned short x_nreloc
; /* # relocation entries */
317 unsigned short x_nlinno
; /* # line numbers */
321 long x_tvfill
; /* tv fill value */
322 unsigned short x_tvlen
; /* length of .tv */
323 unsigned short x_tvran
[2]; /* tv range */
324 } x_tv
; /* info about .tv section (in auxent of symbol .tv)) */
326 /******************************************
327 * RS/6000-specific auxent - last auxent for every external symbol
328 ******************************************/
330 long x_scnlen
; /* csect length */
331 long x_parmhash
; /* parm type hash index */
332 unsigned short x_snhash
; /* sect num with parm hash */
333 unsigned char x_smtyp
; /* symbol align and type */
334 /* 0-4 - Log 2 of alignment */
335 /* 5-7 - symbol type */
336 unsigned char x_smclas
; /* storage mapping class */
337 long x_stab
; /* dbx stab info index */
338 unsigned short x_snstab
; /* sect num with dbx stab */
339 } x_csect
; /* csect definition information */
341 /* x_smtyp values: */
343 #define SMTYP_ALIGN(x) ((x) >> 3) /* log2 of alignment */
344 #define SMTYP_SMTYP(x) ((x) & 0x7) /* symbol type */
345 /* Symbol type values: */
346 #define XTY_ER 0 /* External reference */
347 #define XTY_SD 1 /* Csect definition */
348 #define XTY_LD 2 /* Label definition */
349 #define XTY_CM 3 /* .BSS */
350 #define XTY_EM 4 /* Error message */
351 #define XTY_US 5 /* "Reserved for internal use" */
353 /* x_smclas values: */
355 #define XMC_PR 0 /* Read-only program code */
356 #define XMC_RO 1 /* Read-only constant */
357 #define XMC_DB 2 /* Read-only debug dictionary table */
358 #define XMC_TC 3 /* Read-write general TOC entry */
359 #define XMC_UA 4 /* Read-write unclassified */
360 #define XMC_RW 5 /* Read-write data */
361 #define XMC_GL 6 /* Read-only global linkage */
362 #define XMC_XO 7 /* Read-only extended operation (simulated insn) */
363 #define XMC_SV 8 /* Read-only supervisor call */
364 #define XMC_BS 9 /* Read-write BSS */
365 #define XMC_DS 10 /* Read-write descriptor csect */
366 #define XMC_UC 11 /* Read-write unnamed Fortran common */
367 #define XMC_TI 12 /* Read-only traceback index csect */
368 #define XMC_TB 13 /* Read-only traceback table csect */
370 #define XMC_TC0 15 /* Read-write TOC anchor for TOC addressability */
373 /******************************************
374 * I960-specific *2nd* aux. entry formats
375 ******************************************/
377 /* This is a very old typo that keeps getting propagated. */
378 #define x_stdindx x_stindx
379 long x_stindx
; /* sys. table entry */
380 } x_sc
; /* system call entry */
383 unsigned long x_balntry
; /* BAL entry point */
384 } x_bal
; /* BAL-callable function */
387 unsigned long x_timestamp
; /* time stamp */
388 char x_idstring
[20]; /* producer identity string */
389 } x_ident
; /* Producer ident info */
393 /********************** RELOCATION DIRECTIVES **********************/
395 struct internal_reloc
397 long r_vaddr
; /* Virtual address of reference */
398 long r_symndx
; /* Index into symbol table */
399 unsigned short r_type
; /* Relocation type */
402 unsigned char r_size
;
405 unsigned short r_offset
;
409 #define R_RELBYTE 017
410 #define R_RELWORD 020
411 #define R_PCRBYTE 022
412 #define R_PCRWORD 023
413 #define R_PCRLONG 024
417 #define R_RELBYTE 017
418 #define R_RELWORD 020
420 #define R_PCRBYTE 022
421 #define R_PCRWORD 023
422 #define R_PCRLONG 024
430 #define R_RELLONG (0x11) /* Direct 32-bit relocation */
431 #define R_IPRSHORT (0x18)
432 #define R_IPRMED (0x19) /* 24-bit ip-relative relocation */
433 #define R_IPRLONG (0x1a)
434 #define R_OPTCALL (0x1b) /* 32-bit optimizable call (leafproc/sysproc) */
435 #define R_OPTCALLX (0x1c) /* 64-bit optimizable call (leafproc/sysproc) */
436 #define R_GETSEG (0x1d)
437 #define R_GETPA (0x1e)
438 #define R_TAGWORD (0x1f)
439 #define R_JUMPTARG 0x20 /* strange 29k 00xx00xx reloc */
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