1*53005Sbostic /*- 2*53005Sbostic * Copyright (c) 1992 The Regents of the University of California. 3*53005Sbostic * All rights reserved. 4*53005Sbostic * 5*53005Sbostic * %sccs.include.redist.c% 6*53005Sbostic * 7*53005Sbostic * @(#)exec.h 7.1 (Berkeley) 03/18/92 8*53005Sbostic */ 9*53005Sbostic 10*53005Sbostic /* Size of a page in an object file. */ 11*53005Sbostic #define __LDPGSZ 4096 12*53005Sbostic 13*53005Sbostic /* Valid magic number check. */ 14*53005Sbostic #define N_BADMAG(ex) \ 15*53005Sbostic ((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \ 16*53005Sbostic (ex).a_magic != ZMAGIC) 17*53005Sbostic 18*53005Sbostic /* Address of the bottom of the text segment. */ 19*53005Sbostic #define N_TXTADDR(X) 0 20*53005Sbostic 21*53005Sbostic /* Address of the bottom of the data segment. */ 22*53005Sbostic #define N_DATADDR(ex) \ 23*53005Sbostic (N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \ 24*53005Sbostic : __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1)))) 25*53005Sbostic 26*53005Sbostic /* Text segment offset. */ 27*53005Sbostic #define N_TXTOFF(ex) \ 28*53005Sbostic ((ex).a_magic == ZMAGIC ? __LDPGSZ : sizeof(struct exec)) 29*53005Sbostic 30*53005Sbostic /* Data segment offset. */ 31*53005Sbostic #define N_DATOFF(ex) \ 32*53005Sbostic (N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \ 33*53005Sbostic __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1)))) 34*53005Sbostic 35*53005Sbostic /* Symbol table offset. */ 36*53005Sbostic #define N_SYMOFF(ex) \ 37*53005Sbostic (N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \ 38*53005Sbostic (ex).a_drsize) 39*53005Sbostic 40*53005Sbostic /* String table offset. */ 41*53005Sbostic #define N_STROFF(ex) (N_SYMOFF(ex) + (ex).a_syms) 42*53005Sbostic 43*53005Sbostic /* Description of the object file header (a.out format). */ 44*53005Sbostic struct exec { 45*53005Sbostic #define MID_ZERO 0 /* unknown - implementation dependent */ 46*53005Sbostic #define MID_SUN010 1 /* sun 68010/68020 binary */ 47*53005Sbostic #define MID_SUN020 2 /* sun 68020-only binary */ 48*53005Sbostic #define MID_SUN_SPARC 3 /* sparc binary */ 49*53005Sbostic #define MID_HP200 200 /* hp200 (68010) BSD binary */ 50*53005Sbostic #define MID_HP300 300 /* hp300 (68020+68881) BSD binary */ 51*53005Sbostic #define MID_HPUX 0x20C /* hp200/300 HP-UX binary */ 52*53005Sbostic #define MID_HPUX800 0x20B /* hp800 HP-UX binary */ 53*53005Sbostic u_short a_mid; /* machine ID */ 54*53005Sbostic 55*53005Sbostic #define OMAGIC 0407 /* old impure format */ 56*53005Sbostic #define NMAGIC 0410 /* read-only text */ 57*53005Sbostic #define ZMAGIC 0413 /* demand load format */ 58*53005Sbostic u_short a_magic; /* magic number */ 59*53005Sbostic 60*53005Sbostic u_long a_text; /* text segment size */ 61*53005Sbostic u_long a_data; /* initialized data size */ 62*53005Sbostic u_long a_bss; /* uninitialized data size */ 63*53005Sbostic u_long a_syms; /* symbol table size */ 64*53005Sbostic u_long a_entry; /* entry point */ 65*53005Sbostic u_long a_trsize; /* text relocation size */ 66*53005Sbostic u_long a_drsize; /* data relocation size */ 67*53005Sbostic }; 68*53005Sbostic #define a_machtype a_mid /* SUN compatibility */ 69