1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)exec.h 7.1 (Berkeley) 06/04/86 7 */ 8 9 /* 10 * Header prepended to each a.out file. 11 */ 12 struct exec { 13 long a_magic; /* magic number */ 14 unsigned long a_text; /* size of text segment */ 15 unsigned long a_data; /* size of initialized data */ 16 unsigned long a_bss; /* size of uninitialized data */ 17 unsigned long a_syms; /* size of symbol table */ 18 unsigned long a_entry; /* entry point */ 19 unsigned long a_trsize; /* size of text relocation */ 20 unsigned long a_drsize; /* size of data relocation */ 21 }; 22 23 #define OMAGIC 0407 /* old impure format */ 24 #define NMAGIC 0410 /* read-only text */ 25 #define ZMAGIC 0413 /* demand load format */ 26