a.out is no longer the commonly encountered binary file format, the world has moved to ELF.

Move the a.out specific defines and macros, but the MID_xxx values, from
<sys/exec.h> to <a.out.h>, and update the few userland binaries which really
need these defines (i.e. boot-related tools for old architectures) to
explicitly include <a.out.h> when needed.

"Fine" deraadt@

distrib/special/more/more.c

···
-/*	$OpenBSD: more.c,v 1.41 2019/06/28 13:32:52 deraadt Exp $	*/
+/*	$OpenBSD: more.c,v 1.42 2024/10/16 18:47:47 miod Exp $	*/
 
 /*
  * Copyright (c) 2003 Todd C. Miller <[e-mail]>
···
  */
 
 #include <sys/types.h>
-#include <sys/exec.h>
 #include <sys/ioctl.h>
 #include <sys/stat.h>
 
+#include <a.out.h>
 #include <ctype.h>
 #include <curses.h>
 #include <errno.h>

include/a.out.h

···
-/*	$OpenBSD: a.out.h,v 1.3 2003/06/02 19:34:12 millert Exp $	*/
+/*	$OpenBSD: a.out.h,v 1.4 2024/10/16 18:47:48 miod Exp $	*/
 /*	$NetBSD: a.out.h,v 1.15 1994/10/26 00:55:42 cgd Exp $	*/
 
 /*-
···
 
 #ifndef	_AOUT_H_
 #define	_AOUT_H_
+
+/*
+ * Legacy a.out structures and defines.
+ */
+
+/*
+ * Header prepended to each a.out file.
+ * only manipulate the a_midmag field via the
+ * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below.
+ */
+struct exec {
+	u_int32_t	a_midmag;	/* htonl(flags<<26|mid<<16|magic) */
+	u_int32_t	a_text;		/* text segment size */
+	u_int32_t	a_data;		/* initialized data size */
+	u_int32_t	a_bss;		/* uninitialized data size */
+	u_int32_t	a_syms;		/* symbol table size */
+	u_int32_t	a_entry;	/* entry point */
+	u_int32_t	a_trsize;	/* text relocation size */
+	u_int32_t	a_drsize;	/* data relocation size */
+};
+
+/* a_magic */
+#define	OMAGIC		0407	/* old impure format */
+#define	NMAGIC		0410	/* read-only text */
+#define	ZMAGIC		0413	/* demand load format */
+#define	QMAGIC		0314	/* "compact" demand load format; deprecated */
+
+/*
+ * a_flags
+ */
+#define EX_DYNAMIC	0x20
+#define EX_PIC		0x10
+#define EX_DPMASK	0x30
+/*
+ * Interpretation of the (a_flags & EX_DPMASK) bits:
+ *
+ *	00		traditional executable or object file
+ *	01		object file contains PIC code (set by `as -k')
+ *	10		dynamic executable
+ *	11		position independent executable image
+ * 			(eg. a shared library)
+ *
+ */
+
+/*
+ * The a.out structure's a_midmag field is a network-byteorder encoding
+ * of this int
+ *	FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
+ * Where `F' is 6 bits of flag like EX_DYNAMIC,
+ *       `m' is 10 bits of machine-id like MID_I386, and
+ *       `M' is 16 bits worth of magic number, ie. ZMAGIC.
+ * The macros below will set/get the needed fields.
+ */
+#define	N_GETMAGIC(ex) \
+    ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : ((ex).a_midmag))
+#define	N_GETMAGIC2(ex) \
+    ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : \
+    (((ex).a_midmag) | 0x10000) )
+#define	N_GETMID(ex) \
+    ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>16)&0x03ff) : MID_ZERO )
+#define	N_GETFLAG(ex) \
+    ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>26)&0x3f) : 0 )
+#define	N_SETMAGIC(ex,mag,mid,flag) \
+    ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
+    (((mag)&0xffff)) ) )
+
+#define	N_ALIGN(ex,x) \
+	(N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \
+	((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x))
+
+/* Valid magic number check. */
+#define	N_BADMAG(ex) \
+	(N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
+	N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC)
+
+/* Address of the bottom of the text segment. */
+#define	N_TXTADDR(ex)	(N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : __LDPGSZ)
+
+/* Address of the bottom of the data segment. */
+#define	N_DATADDR(ex) \
+	(N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \
+	(N_TXTADDR(ex) + (ex).a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1))
+
+/* Address of the bottom of the bss segment. */
+#define	N_BSSADDR(ex) \
+	(N_DATADDR(ex) + (ex).a_data)
+
+/* Text segment offset. */
+#define	N_TXTOFF(ex) \
+	( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
+	0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? __LDPGSZ : \
+	sizeof(struct exec)) )
+
+/* Data segment offset. */
+#define	N_DATOFF(ex) \
+	N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
+
+/* Text relocation table offset. */
+#define	N_TRELOFF(ex) \
+	(N_DATOFF(ex) + (ex).a_data)
+
+/* Data relocation table offset. */
+#define	N_DRELOFF(ex) \
+	(N_TRELOFF(ex) + (ex).a_trsize)
+
+/* Symbol table offset. */
+#define	N_SYMOFF(ex) \
+	(N_DRELOFF(ex) + (ex).a_drsize)
+
+/* String table offset. */
+#define	N_STROFF(ex) \
+	(N_SYMOFF(ex) + (ex).a_syms)
 
 #include <sys/exec.h>
 

sys/arch/hppa/stand/mkboot/mkboot.c

···
-/*	$OpenBSD: mkboot.c,v 1.21 2017/12/30 23:08:29 guenther Exp $	*/
+/*	$OpenBSD: mkboot.c,v 1.22 2024/10/16 18:47:48 miod Exp $	*/
 
 /*
  * Copyright (c) 1990, 1993
···
  */
 
 #include <sys/param.h>
-#include <sys/exec.h>
-#include <sys/exec_elf.h>
 #include <sys/stat.h>
 
+#include <a.out.h>
 #include <ctype.h>
+#include <elf.h>
 #include <err.h>
 #include <fcntl.h>
 #include <stdlib.h>

sys/sys/exec.h

···
-/*	$OpenBSD: exec.h,v 1.54 2024/04/02 08:39:16 deraadt Exp $	*/
+/*	$OpenBSD: exec.h,v 1.55 2024/10/16 18:47:48 miod Exp $	*/
 /*	$NetBSD: exec.h,v 1.59 1996/02/09 18:25:09 christos Exp $	*/
 
 /*-
···
 
 #endif /* _KERNEL */
 
-#ifndef N_PAGSIZ
-#define	N_PAGSIZ(ex)	(__LDPGSZ)
-#endif
-
-/*
- * Legacy a.out structures and defines; start deleting these when
- * external use no longer exist.
- */
-
-
-/*
- * Header prepended to each a.out file.
- * only manipulate the a_midmag field via the
- * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below.
- */
-struct exec {
-	u_int32_t	a_midmag;	/* htonl(flags<<26|mid<<16|magic) */
-	u_int32_t	a_text;		/* text segment size */
-	u_int32_t	a_data;		/* initialized data size */
-	u_int32_t	a_bss;		/* uninitialized data size */
-	u_int32_t	a_syms;		/* symbol table size */
-	u_int32_t	a_entry;	/* entry point */
-	u_int32_t	a_trsize;	/* text relocation size */
-	u_int32_t	a_drsize;	/* data relocation size */
-};
-
-/* a_magic */
-#define	OMAGIC		0407	/* old impure format */
-#define	NMAGIC		0410	/* read-only text */
-#define	ZMAGIC		0413	/* demand load format */
-#define	QMAGIC		0314	/* "compact" demand load format; deprecated */
-
 /*
  * a_mid - keep sorted in numerical order for sanity's sake
  * ensure that: 0 < mid < 0x3ff
···
 #define	MID_HPUX800	0x20B	/* hp800 HP-UX binary pa1.0 */
 #define	MID_HPPA11	0x210	/* hp700 HP-UX binary pa1.1 */
 #define	MID_HPPA20	0x214	/* hp700 HP-UX binary pa2.0 */
-
-/*
- * a_flags
- */
-#define EX_DYNAMIC	0x20
-#define EX_PIC		0x10
-#define EX_DPMASK	0x30
-/*
- * Interpretation of the (a_flags & EX_DPMASK) bits:
- *
- *	00		traditional executable or object file
- *	01		object file contains PIC code (set by `as -k')
- *	10		dynamic executable
- *	11		position independent executable image
- * 			(eg. a shared library)
- *
- */
-
-/*
- * The a.out structure's a_midmag field is a network-byteorder encoding
- * of this int
- *	FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
- * Where `F' is 6 bits of flag like EX_DYNAMIC,
- *       `m' is 10 bits of machine-id like MID_I386, and
- *       `M' is 16 bits worth of magic number, ie. ZMAGIC.
- * The macros below will set/get the needed fields.
- */
-#define	N_GETMAGIC(ex) \
-    ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : ((ex).a_midmag))
-#define	N_GETMAGIC2(ex) \
-    ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : \
-    (((ex).a_midmag) | 0x10000) )
-#define	N_GETMID(ex) \
-    ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>16)&0x03ff) : MID_ZERO )
-#define	N_GETFLAG(ex) \
-    ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>26)&0x3f) : 0 )
-#define	N_SETMAGIC(ex,mag,mid,flag) \
-    ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
-    (((mag)&0xffff)) ) )
-
-#define	N_ALIGN(ex,x) \
-	(N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \
-	((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x))
-
-/* Valid magic number check. */
-#define	N_BADMAG(ex) \
-	(N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
-	N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC)
-
-/* Address of the bottom of the text segment. */
-#define	N_TXTADDR(ex)	(N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : __LDPGSZ)
-
-/* Address of the bottom of the data segment. */
-#define	N_DATADDR(ex) \
-	(N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \
-	(N_TXTADDR(ex) + (ex).a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1))
-
-/* Address of the bottom of the bss segment. */
-#define	N_BSSADDR(ex) \
-	(N_DATADDR(ex) + (ex).a_data)
-
-/* Text segment offset. */
-#define	N_TXTOFF(ex) \
-	( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
-	0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? __LDPGSZ : \
-	sizeof(struct exec)) )
-
-/* Data segment offset. */
-#define	N_DATOFF(ex) \
-	N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
-
-/* Text relocation table offset. */
-#define	N_TRELOFF(ex) \
-	(N_DATOFF(ex) + (ex).a_data)
-
-/* Data relocation table offset. */
-#define	N_DRELOFF(ex) \
-	(N_TRELOFF(ex) + (ex).a_trsize)
-
-/* Symbol table offset. */
-#define	N_SYMOFF(ex) \
-	(N_DRELOFF(ex) + (ex).a_drsize)
-
-/* String table offset. */
-#define	N_STROFF(ex) \
-	(N_SYMOFF(ex) + (ex).a_syms)
 
 #include <machine/exec.h>
 

usr.sbin/mopd/common/file.c

···
-/*	$OpenBSD: file.c,v 1.19 2017/10/29 08:45:53 mpi Exp $ */
+/*	$OpenBSD: file.c,v 1.20 2024/10/16 18:47:48 miod Exp $ */
 
 /*
  * Copyright (c) 1995-96 Mats O Jansson.  All rights reserved.
···
 
 #ifndef NOAOUT
 #if defined(__OpenBSD__)
-#include <sys/exec.h>
+#include <a.out.h>
 #endif
 #if defined(__bsdi__)
 #define NOAOUT

usr.sbin/mopd/mopa.out/mopa.out.c

···
-/*	$OpenBSD: mopa.out.c,v 1.18 2022/12/28 21:30:17 jmc Exp $ */
+/*	$OpenBSD: mopa.out.c,v 1.19 2024/10/16 18:47:48 miod Exp $ */
 
 /*
  * mopa.out - Convert a Unix format kernel into something that
···
 #include "common/mopdef.h"
 #include "common/file.h"
 #if defined(__OpenBSD__)
-#include <sys/exec.h>
+#include <a.out.h>
 #endif
 #if defined(__FreeBSD__)
 #include <sys/imgact_aout.h>