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1.1 root 1: /* sccs id @(#)oaout.h 34.1 10/3/80 */
2:
3: /*
4: * Format of an a.out header
5: */
6:
7: struct exec { /* a.out header */
8: int a_magic; /* magic number */
9: unsigned a_text; /* size of text segment */
10: unsigned a_data; /* size of initialized data */
11: unsigned a_bss; /* size of uninitialized data */
12: unsigned a_syms; /* size of symbol table */
13: unsigned a_entry; /* entry point */
14: unsigned a_trsize; /* size of text relocation */
15: unsigned a_drsize; /* size of data relocation */
16: };
17:
18: #define A_MAGIC1 0407 /* normal */
19: #define A_MAGIC2 0410 /* read-only text */
20: #define A_MAGIC3 0411 /* separated I&D (not on VAX) */
21: #define A_MAGIC4 0405 /* overlay */
22: #define A_MAGIC5 0413 /* demand page read-only text */
23:
24: struct relocation_info {
25: long r_address; /* relative to current segment */
26: long r_symbolnum:24,
27: /* if extern then symbol table */
28: /* ordinal (0, 1, 2, ...) else */
29: /* segment number (same as symbol types) */
30: r_pcrel:1, /* if so, segment offset has already */
31: /* been subtracted */
32: r_length:2, /* 0=byte, 1=word, 2=long */
33: r_extern:1, /* does not include value */
34: /* of symbol referenced */
35: r_offset:1, /* already includes origin */
36: /* of this segment (?) */
37: r_pad:3; /* nothing, yet */
38: };
39: #ifndef NCPS
40: #define NCPS 8
41: #endif
42: struct nlist { /* symbol table entry */
43: char n_name[NCPS]; /* symbol name */
44: char n_type; /* type flag */
45: char n_other;
46: short n_desc;
47: unsigned n_value; /* value */
48: };
49:
50: /* values for type flag */
51: #define N_UNDF 0 /* undefined */
52: #define N_ABS 02 /* absolute */
53: #define N_TEXT 04 /* text */
54: #define N_DATA 06 /* data */
55: #define N_BSS 08
56: #define N_TYPE 037
57: #define N_FN 037 /* file name symbol */
58:
59: #define N_GSYM 0040 /* global sym: name,,type,0 */
60: #define N_FNAME 0042 /* procedure name (f77 kludge): name,,,0 */
61: #define N_FUN 0044 /* procedure: name,,linenumber,address */
62: #define N_STSYM 0046 /* static symbol: name,,type,address */
63: #define N_LCSYM 0048 /* .lcomm symbol: name,,type,address */
64: #define N_RSYM 0100 /* register sym: name,,register,offset */
65: #define N_SLINE 0104 /* src line: ,,linenumber,address */
66: #define N_SSYM 0140 /* structure elt: name,,type,struct_offset */
67: #define N_SO 0144 /* source file name: name,,,address */
68: #define N_LSYM 0200 /* local sym: name,,type,offset */
69: #define N_SOL 0204 /* #line source filename: name,,,address */
70: #define N_PSYM 0240 /* parameter: name,,type,offset */
71: #define N_ENTRY 0244 /* alternate entry: name,,linenumber,address */
72: #define N_LBRAC 0300 /* left bracket: ,,nesting level,address */
73: #define N_RBRAC 0340 /* right bracket: ,,nesting level,address */
74: #define N_BCOMM 0342 /* begin common: name,,, */
75: #define N_ECOMM 0344 /* end common: name,,, */
76: #define N_ECOML 0348 /* end common (local name): ,,,address */
77: #define N_LENG 0376 /* second stab entry with length information */
78:
79: #define N_EXT 01 /* external bit, or'ed in */
80:
81: #define FORMAT "%08x"
82:
83: #define STABTYPES 0340
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