1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)exec.h 8.1 (Berkeley) 06/10/93 8 */ 9 10 #include <machine/endian.h> 11 12 /* Size of a page in an object file. */ 13 #define __LDPGSZ 4096 14 15 /* Valid magic number check. */ 16 #define N_BADMAG(ex) \ 17 ((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \ 18 (ex).a_magic != ZMAGIC) 19 20 /* Address of the bottom of the text segment. */ 21 #define N_TXTADDR(X) __LDPGSZ 22 23 /* Address of the bottom of the data segment. */ 24 #define N_DATADDR(ex) \ 25 (N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \ 26 : __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1)))) 27 28 /* Text segment offset. */ 29 #define N_TXTOFF(ex) \ 30 ((ex).a_magic == ZMAGIC ? 0 : sizeof(struct exec)) 31 32 /* Data segment offset. */ 33 #define N_DATOFF(ex) \ 34 (N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \ 35 __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1)))) 36 37 /* Symbol table offset. */ 38 #define N_SYMOFF(ex) \ 39 (N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \ 40 (ex).a_drsize) 41 42 /* String table offset. */ 43 #define N_STROFF(ex) (N_SYMOFF(ex) + (ex).a_syms) 44 45 /* Description of the object file header (a.out format). */ 46 struct exec { 47 #if BYTE_ORDER == BIG_ENDIAN 48 u_short a_mid; /* machine ID */ 49 u_short a_magic; /* magic number */ 50 #else 51 u_short a_magic; /* magic number */ 52 u_short a_mid; /* machine ID */ 53 #endif 54 55 u_long a_text; /* text segment size */ 56 u_long a_data; /* initialized data size */ 57 u_long a_bss; /* uninitialized data size */ 58 u_long a_syms; /* symbol table size */ 59 u_long a_entry; /* entry point */ 60 u_long a_trsize; /* text relocation size */ 61 u_long a_drsize; /* data relocation size */ 62 }; 63 64 #define a_machtype a_mid /* SUN compatibility */ 65 66 #define MID_ZERO 0 /* unknown - implementation dependent */ 67 #define MID_SUN010 1 /* sun 68010/68020 binary */ 68 #define MID_SUN020 2 /* sun 68020-only binary */ 69 #define MID_SUN_SPARC 3 /* sparc binary */ 70 #define MID_386 100 /* Intel 80386 binary */ 71 #define MID_29K 101 /* AMD 29000 binary */ 72 #define MID_MIPSI 151 /* MIPS R2000/R3000 binary */ 73 #define MID_MIPSII 152 /* MIPS R4000 binary */ 74 #define MID_HP200 200 /* hp200 (68010) BSD binary */ 75 #define MID_HP300 300 /* hp300 (68020+68881) BSD binary */ 76 #define MID_HPUX 0x20C /* hp200/300 HP-UX binary */ 77 #define MID_HPUX800 0x20B /* hp800 HP-UX binary */ 78 79 #define OMAGIC 0407 /* old impure format */ 80 #define NMAGIC 0410 /* read-only text */ 81 #define ZMAGIC 0413 /* demand load format */ 82