1 /*** coff information for the ARM */
5 /********************** FILE HEADER **********************/
7 struct external_filehdr
{
8 char f_magic
[2]; /* magic number */
9 char f_nscns
[2]; /* number of sections */
10 char f_timdat
[4]; /* time & date stamp */
11 char f_symptr
[4]; /* file pointer to symtab */
12 char f_nsyms
[4]; /* number of symtab entries */
13 char f_opthdr
[2]; /* sizeof(optional hdr) */
14 char f_flags
[2]; /* flags */
18 * F_RELFLG relocation info stripped from file
19 * F_EXEC file is executable (no unresolved external references)
20 * F_LNNO line numbers stripped from file
21 * F_LSYMS local symbols stripped from file
22 * F_INTERWORK file supports switching between ARM and Thumb instruction sets
23 * F_INTERWORK_SET the F_INTERWORK bit is valid
24 * F_APCS_FLOAT code passes float arguments in float registers
25 * F_PIC code is reentrant/position-independent
26 * F_AR32WR file has byte ordering of an AR32WR machine (e.g. vax)
27 * F_APCS_26 file uses 26 bit ARM Procedure Calling Standard
28 * F_APCS_SET the F_APCS_26, F_APCS_FLOAT and F_PIC bits have been initialised
31 #define F_RELFLG (0x0001)
32 #define F_EXEC (0x0002)
33 #define F_LNNO (0x0004)
34 #define F_LSYMS (0x0008)
35 #define F_INTERWORK (0x0010)
36 #define F_INTERWORK_SET (0x0020)
37 #define F_APCS_FLOAT (0x0040)
39 #define F_PIC (0x0080)
40 #define F_AR32WR (0x0100)
41 #define F_APCS_26 (0x0400)
42 #define F_APCS_SET (0x0800)
44 /* Bits stored in flags field of the internal_f structure */
46 #define F_INTERWORK (0x0010)
47 #define F_APCS_FLOAT (0x0040)
48 #define F_PIC (0x0080)
49 #define F_APCS26 (0x1000)
50 #define F_ARM_ARCHITECTURE_MASK (0x4000+0x0800+0x0400)
51 #define F_ARM_2 (0x0400)
52 #define F_ARM_2a (0x0800)
53 #define F_ARM_3 (0x0c00)
54 #define F_ARM_3M (0x4000)
55 #define F_ARM_4 (0x4400)
56 #define F_ARM_4T (0x4800)
57 #define F_ARM_5 (0x4c00)
60 * ARMMAGIC ought to encoded the procesor type,
61 * but it is too late to change it now, instead
62 * the flags field of the internal_f structure
63 * is used as shown above.
68 #define ARMMAGIC 0xa00 /* I just made this up */
70 #define ARMBADMAG(x) (((x).f_magic != ARMMAGIC))
72 #define FILHDR struct external_filehdr
76 /********************** AOUT "OPTIONAL HEADER" **********************/
81 char magic
[2]; /* type of file */
82 char vstamp
[2]; /* version stamp */
83 char tsize
[4]; /* text size in bytes, padded to FW bdry*/
84 char dsize
[4]; /* initialized data " " */
85 char bsize
[4]; /* uninitialized data " " */
86 char entry
[4]; /* entry pt. */
87 char text_start
[4]; /* base of text used for this file */
88 char data_start
[4]; /* base of data used for this file */
98 #define OMAGIC 0404 /* object files, eg as output */
99 #define ZMAGIC 0413 /* demand load format, eg normal ld output */
100 #define STMAGIC 0401 /* target shlib */
101 #define SHMAGIC 0443 /* host shlib */
104 /* define some NT default values */
105 /* #define NT_IMAGE_BASE 0x400000 moved to internal.h */
106 #define NT_SECTION_ALIGNMENT 0x1000
107 #define NT_FILE_ALIGNMENT 0x200
108 #define NT_DEF_RESERVE 0x100000
109 #define NT_DEF_COMMIT 0x1000
111 /********************** SECTION HEADER **********************/
114 struct external_scnhdr
{
115 char s_name
[8]; /* section name */
116 char s_paddr
[4]; /* physical address, aliased s_nlib */
117 char s_vaddr
[4]; /* virtual address */
118 char s_size
[4]; /* section size */
119 char s_scnptr
[4]; /* file ptr to raw data for section */
120 char s_relptr
[4]; /* file ptr to relocation */
121 char s_lnnoptr
[4]; /* file ptr to line numbers */
122 char s_nreloc
[2]; /* number of relocation entries */
123 char s_nlnno
[2]; /* number of line number entries*/
124 char s_flags
[4]; /* flags */
127 #define SCNHDR struct external_scnhdr
131 * names of "special" sections
133 #define _TEXT ".text"
134 #define _DATA ".data"
136 #define _COMMENT ".comment"
139 /* We use the .rdata section to hold read only data. */
140 #define _LIT ".rdata"
142 /********************** LINE NUMBERS **********************/
144 /* 1 line number entry for every "breakpointable" source line in a section.
145 * Line numbers are grouped on a per function basis; first entry in a function
146 * grouping will have l_lnno = 0 and in place of physical address will be the
147 * symbol table index of the function name.
149 struct external_lineno
{
151 char l_symndx
[4]; /* function name symbol index, iff l_lnno == 0*/
152 char l_paddr
[4]; /* (physical) address of line number */
154 char l_lnno
[2]; /* line number */
158 #define LINENO struct external_lineno
162 /********************** SYMBOLS **********************/
164 #define E_SYMNMLEN 8 /* # characters in a symbol name */
165 #define E_FILNMLEN 14 /* # characters in a file name */
166 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
168 struct external_syment
171 char e_name
[E_SYMNMLEN
];
184 #define N_BTMASK (0xf)
185 #define N_TMASK (0x30)
189 union external_auxent
{
191 char x_tagndx
[4]; /* str, un, or enum tag indx */
194 char x_lnno
[2]; /* declaration line number */
195 char x_size
[2]; /* str/union/array size */
197 char x_fsize
[4]; /* size of function */
200 struct { /* if ISFCN, tag, or .bb */
201 char x_lnnoptr
[4]; /* ptr to fcn line # */
202 char x_endndx
[4]; /* entry ndx past block end */
204 struct { /* if ISARY, up to 4 dimen. */
205 char x_dimen
[E_DIMNUM
][2];
208 char x_tvndx
[2]; /* tv index */
212 char x_fname
[E_FILNMLEN
];
220 char x_scnlen
[4]; /* section length */
221 char x_nreloc
[2]; /* # relocation entries */
222 char x_nlinno
[2]; /* # line numbers */
223 char x_checksum
[4]; /* section COMDAT checksum */
224 char x_associated
[2]; /* COMDAT associated section index */
225 char x_comdat
[1]; /* COMDAT selection number */
229 char x_tvfill
[4]; /* tv fill value */
230 char x_tvlen
[2]; /* length of .tv */
231 char x_tvran
[2][2]; /* tv range */
232 } x_tv
; /* info about .tv section (in auxent of symbol .tv)) */
237 #define SYMENT struct external_syment
239 #define AUXENT union external_auxent
243 # define _ETEXT "etext"
246 /********************** RELOCATION DIRECTIVES **********************/
250 struct external_reloc
{
258 #define RELOC struct external_reloc
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