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1.1 root 1: /*
2: * coff.h
3: * Common Object File Format (COFF) header for COHERENT.
4: */
5:
6: /* File header. */
7: typedef struct filehdr {
8: unsigned short f_magic; /* Magic number */
9: unsigned short f_nscns; /* Number of sections */
10: long f_timdat; /* Time and date */
11: long f_symptr; /* Seek to symbol table */
12: long f_nsyms; /* Number of symbols */
13: unsigned short f_opthdr; /* Optional header size */
14: unsigned short f_flags; /* Flags */
15: } FILHDR;
16:
17: #define FILHSZ sizeof(FILHDR)
18:
19: /* Magic number. */
20: #define I386MAGIC 0x14C /* Intel iAPX 80386 */
21: #define C_386_MAGIC 0x14C /* Intel iAPX 80386 */
22:
23: /*
24: * This is just a short version of this macro. We really ought to define
25: * all the other magic numbers as well.
26: */
27: #define ISCOFF(x) ((x) == C_386_MAGIC)
28:
29: /* Flags for f_flags field. */
30: #define F_RELFLG 0x0001 /* No relocation info */
31: #define F_EXEC 0x0002 /* Executable */
32: #define F_LNNO 0x0004 /* No line numbers */
33: #define F_LSYMS 0x0008 /* No local symbols */
34: #define F_MINMAL 0x0010 /* product of strip */
35: #define F_AR32WR 0x0100 /* i80x86 byte order */
36: #define F_KER 0x0800 /* Loadable driver */
37:
38: /* Optional header. */
39: typedef struct aouthdr {
40: short magic; /* AOUT_MAGIC */
41: short vstamp; /* version stamp */
42: long tsize; /* .text size in bytes */
43: long dsize; /* .data size in bytes */
44: long bsize; /* .bss size in bytes */
45: long entry; /* entry point */
46: long text_start; /* base of .text data */
47: long data_start; /* base of .data data */
48: } AOUTHDR;
49:
50: /* Magic numbers for aouthdr. Coherent only supports Z_MAGIC */
51: #define O_MAGIC 0x107 /* Text and data are contiguous text not shared */
52: #define N_MAGIC 0x108 /* .data starts at seg after .text .text is protected */
53: #define I_MAGIC 0x109 /* sep id */
54: #define Z_MAGIC 0x10B /* Text and data aligned within a.out for direct page */
55:
56: /* Section header. */
57: typedef struct scnhdr {
58: char s_name[8]; /* Section name */
59: long s_paddr; /* Physical address */
60: long s_vaddr; /* Virtual address */
61: long s_size; /* Size */
62: long s_scnptr; /* Data pointer */
63: long s_relptr; /* Reloc pointer */
64: long s_lnnoptr; /* Line number pointer */
65: unsigned short s_nreloc; /* Reloc entries */
66: unsigned short s_nlnno; /* Line number entries */
67: long s_flags; /* Flags */
68: } SCNHDR;
69:
70: #define SCNHSZ sizeof(SCNHDR)
71:
72: /* Names of special sections */
73: #define _TEXT ".text"
74: #define _DATA ".data"
75: #define _BSS ".bss"
76: #define _TV ".tv"
77: #define _INIT ".init"
78: #define _FINI ".fini"
79:
80: /* Flags for s_flags field. */
81: #define STYP_TEXT 0x20L /* Code segment */
82: #define STYP_DATA 0x40L /* Data segment */
83: #define STYP_BSS 0x80L /* BSS segment */
84:
85: /* Relocation items. */
86: typedef struct reloc {
87: long r_vaddr; /* Address (where) */
88: long r_symndx; /* Symbol index (what) */
89: unsigned short r_type; /* Type (how) */
90: } RELOC;
91:
92: #define RELSZ 10 /* sizeof(RELOC) */
93:
94: /* Relocation types. */
95: #define R_DIR8 0x07 /* 8-bit direct */
96: #define R_DIR16 0x01 /* 16-bit direct */
97: #define R_DIR32 0x06 /* 32-bit direct */
98: #define R_RELBYTE 0x0f /* 8 bit direct */
99: #define R_RELWORD 0x10 /* 16 bit direct */
100: #define R_RELLONG 0x11 /* 32 bit direct */
101: #define R_PCRBYTE 0x12 /* 8-bit PC-relative */
102: #define R_PCRWORD 0x13 /* 16-bit PC-relative */
103: #define R_PCRLONG 0x14 /* 32-bit PC-relative */
104: #define R_NONREL 0x00 /* fake record for ld -r */
105:
106: /* Line number. */
107: typedef struct lineno {
108: union {
109: long l_symndx; /* sym table ix of fun name */
110: long l_paddr; /* physical addr */
111: } l_addr;
112: unsigned short l_lnno; /* line number or 0 for fun */
113: } LINENO;
114:
115: #define LINESZ 6 /* sizeof(LINENO) */
116:
117: /* Symbol table. */
118: #define SYMNMLEN 8 /* Symbol name length */
119: #define FILNMLEN 14 /* Characters in a file name */
120: #define DIMNUM 4 /* dimensions in aux entry */
121:
122: typedef struct syment {
123: union {
124: char _n_name[SYMNMLEN]; /* Name */
125: struct {
126: long _n_zeroes; /* If name[0-3] zero, */
127: long _n_offset; /* string table offset */
128: } _n_n;
129: char *_n_nptr[2];
130: } _n;
131: long n_value; /* Value */
132: short n_scnum; /* Section number */
133: unsigned short n_type; /* Type */
134: char n_sclass; /* Storage class */
135: char n_numaux; /* Auxilliary entries */
136: } SYMENT;
137:
138: #define SYMESZ 18 /* sizeof(SYMENT) */
139: #define n_name _n._n_name
140: #define n_zeroes _n._n_n._n_zeroes
141: #define n_offset _n._n_n._n_offset
142:
143: /* Special section numbers */
144: #define N_UNDEF 0 /* undefined symbol */
145: #define N_ABS -1 /* absolute symbol */
146: #define N_DEBUG -2 /* special debugging symbol */
147: #define N_TV -3 /* symbol needs transfer vector (preload) */
148: #define P_TV -4 /* symbol needs transfer vector (postload) */
149:
150: /* Storage classes. */
151: #define C_EFCN -1 /* end of function */
152: #define C_NULL 0 /* none given */
153: #define C_AUTO 1 /* automatic variable */
154: #define C_EXT 2 /* External */
155: #define C_STAT 3 /* Static */
156: #define C_REG 4 /* register variable */
157: #define C_EXTDEF 5 /* External definition */
158: #define C_LABEL 6 /* label */
159: #define C_ULABEL 7 /* undefined label */
160: #define C_MOS 8 /* member of structure */
161: #define C_ARG 9 /* function argument */
162: #define C_STRTAG 10 /* structure tag */
163: #define C_MOU 11 /* member of union */
164: #define C_UNTAG 12 /* union tag */
165: #define C_TPDEF 13 /* typedef */
166: #define C_USTATIC 14 /* undefined static */
167: #define C_ENTAG 15 /* enum tag */
168: #define C_MOE 16 /* member of enum */
169: #define C_REGPARM 17 /* register parm */
170: #define C_FIELD 18 /* bit field */
171: #define C_BLOCK 100 /* .bb or .eb */
172: #define C_FCN 101 /* .bf or .ef */
173: #define C_EOS 102 /* end of structure */
174: #define C_FILE 103 /* file name */
175:
176: /* is x a tag */
177: #define ISTAG(x) (C_STRTAG==(x) || C_UNTAG==(x) || C_ENTAG==(x))
178:
179: /* fundimental type */
180: #define T_NULL 0
181: #define T_ARG 1
182: #define T_CHAR 2
183: #define T_SHORT 3
184: #define T_INT 4
185: #define T_LONG 5
186: #define T_FLOAT 6
187: #define T_DOUBLE 7
188: #define T_STRUCT 8
189: #define T_UNION 9
190: #define T_ENUM 10
191: #define T_MOE 11 /* member of enumeration */
192: #define T_UCHAR 12
193: #define T_USHORT 13
194: #define T_UINT 14
195: #define T_ULONG 15
196:
197: /* Derived Types in n_type */
198: #define DT_NON 0 /* non derived type */
199: #define DT_PTR 0x10 /* pointer */
200: #define DT_FCN 0x20 /* function */
201: #define DT_ARY 0x30 /* array */
202:
203: /* Type packing constants */
204: #define N_BTMASK 0x15 /* Mask for basic type */
205: #define N_TMASK 0x30 /* Derived type mask */
206: #define N_TSHIFT 2 /* Shift to get at more derivations */
207:
208: /* Type processing macros */
209: #define BTYPE(x) ((x) & N_BTMASK) /* Basic type of x */
210: #define ISPTR(x) (DT_PTR == ((x) & N_TMASK)) /* Is x a pointer */
211: #define ISFCN(x) (DT_FCN == ((x) & N_TMASK)) /* Is x a function */
212: #define ISARY(x) (DT_ARY == ((x) & N_TMASK)) /* Is x an array */
213: #define INCREF(x) ((((x)&~N_BTMASK)<<N_TSHIFT)|DT_PTR|((x)&N_BTMASK))
214: #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
215:
216: /* Aux symbols */
217: typedef union auxent {
218: struct {
219: long x_tagndx; /* struct, union or enum tag index */
220: union {
221: struct {
222: unsigned short x_lnno; /* declaration line */
223: unsigned short x_size; /* size */
224: } x_lnsz;
225: long x_fsize; /* size of function */
226: } x_misc;
227: union {
228: struct { /* if ISFCN tag or .bb */
229: long x_lnnoptr; /* ptr to fcn line # */
230: long x_endndx; /* index past block */
231: } x_fcn;
232: struct { /* if ISARY */
233: unsigned short x_dimen[DIMNUM];
234: } x_ary;
235: } x_fcnary;
236: unsigned short x_tvndx; /* tv index */
237: } x_sym;
238: struct {
239: char x_fname[FILNMLEN];
240: } x_file;
241: struct {
242: long x_scnlen; /* section length */
243: unsigned short x_nreloc; /* reloc entrys */
244: unsigned short x_nlinno; /* line number entries */
245: } x_scn;
246: } AUXENT;
247:
248: #define AUXESZ 18 /* sizeof(auxent) */
249: /* end of coff.h */
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