i386.h revision 33965 
1/*** coff information for Intel 386/486.  */
2
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[4];	/* file pointer to symtab	*/
11	char f_nsyms[4];	/* number of symtab entries	*/
12	char f_opthdr[2];	/* sizeof(optional hdr)		*/
13	char f_flags[2];	/* flags			*/
14};
15
16/* Bits for f_flags:
17 *	F_RELFLG	relocation info stripped from file
18 *	F_EXEC		file is executable (no unresolved external references)
19 *	F_LNNO		line numbers stripped from file
20 *	F_LSYMS		local symbols stripped from file
21 *	F_AR32WR	file has byte ordering of an AR32WR machine (e.g. vax)
22 */
23
24#define F_RELFLG	(0x0001)
25#define F_EXEC		(0x0002)
26#define F_LNNO		(0x0004)
27#define F_LSYMS		(0x0008)
28
29
30
31#define	I386MAGIC	0x14c
32#define I386PTXMAGIC	0x154
33#define I386AIXMAGIC	0x175
34
35/* This is Lynx's all-platform magic number for executables. */
36
37#define LYNXCOFFMAGIC	0415
38
39#define I386BADMAG(x) (((x).f_magic != I386MAGIC) \
40		       && (x).f_magic != I386AIXMAGIC \
41		       && (x).f_magic != I386PTXMAGIC \
42		       && (x).f_magic != LYNXCOFFMAGIC)
43
44#define	FILHDR	struct external_filehdr
45#define	FILHSZ	20
46
47
48/********************** AOUT "OPTIONAL HEADER" **********************/
49
50
51typedef struct
52{
53  char 	magic[2];		/* type of file				*/
54  char	vstamp[2];		/* version stamp			*/
55  char	tsize[4];		/* text size in bytes, padded to FW bdry*/
56  char	dsize[4];		/* initialized data "  "		*/
57  char	bsize[4];		/* uninitialized data "   "		*/
58  char	entry[4];		/* entry pt.				*/
59  char 	text_start[4];		/* base of text used for this file */
60  char 	data_start[4];		/* base of data used for this file */
61
62
63}
64AOUTHDR;
65
66
67#define AOUTSZ 28
68#define AOUTHDRSZ 28
69
70#define OMAGIC          0404    /* object files, eg as output */
71#define ZMAGIC          0413    /* demand load format, eg normal ld output */
72#define STMAGIC		0401	/* target shlib */
73#define SHMAGIC		0443	/* host   shlib */
74
75
76/* define some NT default values */
77/*  #define NT_IMAGE_BASE        0x400000 moved to internal.h */
78#define NT_SECTION_ALIGNMENT 0x1000
79#define NT_FILE_ALIGNMENT    0x200
80#define NT_DEF_RESERVE       0x100000
81#define NT_DEF_COMMIT        0x1000
82
83/********************** SECTION HEADER **********************/
84
85
86struct external_scnhdr {
87	char		s_name[8];	/* section name			*/
88	char		s_paddr[4];	/* physical address, aliased s_nlib */
89	char		s_vaddr[4];	/* virtual address		*/
90	char		s_size[4];	/* section size			*/
91	char		s_scnptr[4];	/* file ptr to raw data for section */
92	char		s_relptr[4];	/* file ptr to relocation	*/
93	char		s_lnnoptr[4];	/* file ptr to line numbers	*/
94	char		s_nreloc[2];	/* number of relocation entries	*/
95	char		s_nlnno[2];	/* number of line number entries*/
96	char		s_flags[4];	/* flags			*/
97};
98
99#define	SCNHDR	struct external_scnhdr
100#define	SCNHSZ	40
101
102/*
103 * names of "special" sections
104 */
105#define _TEXT	".text"
106#define _DATA	".data"
107#define _BSS	".bss"
108#define _COMMENT ".comment"
109#define _LIB ".lib"
110
111/********************** LINE NUMBERS **********************/
112
113/* 1 line number entry for every "breakpointable" source line in a section.
114 * Line numbers are grouped on a per function basis; first entry in a function
115 * grouping will have l_lnno = 0 and in place of physical address will be the
116 * symbol table index of the function name.
117 */
118struct external_lineno {
119	union {
120		char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
121		char l_paddr[4];	/* (physical) address of line number	*/
122	} l_addr;
123	char l_lnno[2];	/* line number		*/
124};
125
126
127#define	LINENO	struct external_lineno
128#define	LINESZ	6
129
130
131/********************** SYMBOLS **********************/
132
133#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
134#define E_FILNMLEN	14	/* # characters in a file name		*/
135#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
136
137struct external_syment
138{
139  union {
140    char e_name[E_SYMNMLEN];
141    struct {
142      char e_zeroes[4];
143      char e_offset[4];
144    } e;
145  } e;
146  char e_value[4];
147  char e_scnum[2];
148  char e_type[2];
149  char e_sclass[1];
150  char e_numaux[1];
151};
152
153#define N_BTMASK	(0xf)
154#define N_TMASK		(0x30)
155#define N_BTSHFT	(4)
156#define N_TSHIFT	(2)
157
158union external_auxent {
159	struct {
160		char x_tagndx[4];	/* str, un, or enum tag indx */
161		union {
162			struct {
163			    char  x_lnno[2]; /* declaration line number */
164			    char  x_size[2]; /* str/union/array size */
165			} x_lnsz;
166			char x_fsize[4];	/* size of function */
167		} x_misc;
168		union {
169			struct {		/* if ISFCN, tag, or .bb */
170			    char x_lnnoptr[4];	/* ptr to fcn line # */
171			    char x_endndx[4];	/* entry ndx past block end */
172			} x_fcn;
173			struct {		/* if ISARY, up to 4 dimen. */
174			    char x_dimen[E_DIMNUM][2];
175			} x_ary;
176		} x_fcnary;
177		char x_tvndx[2];		/* tv index */
178	} x_sym;
179
180	union {
181		char x_fname[E_FILNMLEN];
182		struct {
183			char x_zeroes[4];
184			char x_offset[4];
185		} x_n;
186	} x_file;
187
188	struct {
189		char x_scnlen[4];	/* section length */
190		char x_nreloc[2];	/* # relocation entries */
191		char x_nlinno[2];	/* # line numbers */
192		char x_checksum[4];	/* section COMDAT checksum */
193		char x_associated[2];	/* COMDAT associated section index */
194		char x_comdat[1];	/* COMDAT selection number */
195	} x_scn;
196
197        struct {
198		char x_tvfill[4];	/* tv fill value */
199		char x_tvlen[2];	/* length of .tv */
200		char x_tvran[2][2];	/* tv range */
201	} x_tv;		/* info about .tv section (in auxent of symbol .tv)) */
202
203
204};
205
206#define	SYMENT	struct external_syment
207#define	SYMESZ	18
208#define	AUXENT	union external_auxent
209#define	AUXESZ	18
210
211
212#	define _ETEXT	"etext"
213
214
215/********************** RELOCATION DIRECTIVES **********************/
216
217
218
219struct external_reloc {
220  char r_vaddr[4];
221  char r_symndx[4];
222  char r_type[2];
223};
224
225
226#define RELOC struct external_reloc
227#define RELSZ 10
228
229