[unix-history] / usr / src / sys / sparc / include / exec.h

/*
 * Copyright (c) 1992 The Regents of the University of California.
 * All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)exec.h	7.1 (Berkeley) %G%
 *
 * from: $Header: exec.h,v 1.7 92/07/01 23:51:32 torek Exp $
 */

/*
 * __LDPGSZ is the page size used by the linker and by exec().
 * It may be some multiple of the ``normal'' page size, so that, e.g.,
 * the same binaries can be run on hardware with different page sizes
 * that otherwise use the same instruction set.  It must be no larger
 * than CLBYTES (in param.h).
 */
#define	__LDPGSZ	8192

/* Valid magic number check. */
#define	N_BADMAG(ex) \
	((ex).a_magic != ZMAGIC && (ex).a_magic != NMAGIC && \
	    (ex).a_magic != OMAGIC)

/*
 * N_TXTADDR is the address of the first executable instruction: that is,
 * the place the pc could begin after an a.out is loaded, in order to run
 * the instructions in that a.out.  The pc will actually be set to ex.a_entry
 * but this is the first place it could possibly reference.
 *
 * On the SPARC, binaries begin at __LDPGSZ, i.e., page 1.
 */
#define N_TXTADDR(ex)	8192

/* Address of the bottom of the data segment. */
#define N_DATADDR(ex) \
	(N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
	: __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))

/*
 * N_TXTOFF is the offset within an a.out file of the first executable
 * instruction: that is, the offset in the a.out of the byte that winds
 * up at N_TXTADDR.
 *
 * On the SPARC, the a.out header is included in the executable when running
 * a ZMAGIC file (but not for OMAGIC and NMAGIC).
 */
#define	N_TXTOFF(ex)	((ex).a_magic == ZMAGIC ? 0 : sizeof(struct exec))

/* Data segment offset. */
#define	N_DATOFF(ex) \
	(N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
	__LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))

/* Symbol table offset. */
#define N_SYMOFF(ex) \
	(N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
	    (ex).a_drsize)

/* String table offset. */
#define	N_STROFF(ex) 	(N_SYMOFF(ex) + (ex).a_syms)

/* Description of the object file header (a.out format). */
struct exec {
	u_char	a_dynamic:1;	/* dynamically linked */
	u_char	a_toolversion:7;/* Sun toolset version	XXX */

#define	MID_ZERO	0	/* unknown - implementation dependent */
#define	MID_SUN010	1	/* sun 68010/68020 binary */
#define	MID_SUN020	2	/* sun 68020-only binary */
#define	MID_SUN_SPARC	3	/* sparc binary */
#define	MID_HP200	200	/* hp200 (68010) BSD binary */
#define	MID_HP300	300	/* hp300 (68020+68881) BSD binary */
#define	MID_HPUX	0x20C	/* hp200/300 HP-UX binary */
#define	MID_HPUX800     0x20B   /* hp800 HP-UX binary */
	u_char	a_mid;		/* machine ID */

#define	OMAGIC	0407		/* old impure format */
#define	NMAGIC	0410		/* read-only text */
#define	ZMAGIC	0413		/* demand load format */
	u_short	a_magic;	/* magic number */

	u_long	a_text;		/* text segment size */
	u_long	a_data;		/* initialized data size */
	u_long	a_bss;		/* uninitialized data size */
	u_long	a_syms;		/* symbol table size */
	u_long	a_entry;	/* entry point */
	u_long	a_trsize;	/* text relocation size */
	u_long	a_drsize;	/* data relocation size */
};
#define	a_machtype	a_mid	/* SUN compatibility */
Commit	Line	Data
68608c33 CT	1	/*
	2	* Copyright (c) 1992 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This software was developed by the Computer Systems Engineering group
	6	* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
	7	* contributed to Berkeley.
	8	*
	9	* %sccs.include.redist.c%
	10	*
	11	* @(#)exec.h 7.1 (Berkeley) %G%
	12	*
	13	* from: $Header: exec.h,v 1.7 92/07/01 23:51:32 torek Exp $
	14	*/
	15
	16	/*
	17	* __LDPGSZ is the page size used by the linker and by exec().
	18	* It may be some multiple of the ``normal'' page size, so that, e.g.,
	19	* the same binaries can be run on hardware with different page sizes
	20	* that otherwise use the same instruction set. It must be no larger
	21	* than CLBYTES (in param.h).
	22	*/
	23	#define __LDPGSZ 8192
	24
	25	/* Valid magic number check. */
	26	#define N_BADMAG(ex) \
	27	((ex).a_magic != ZMAGIC && (ex).a_magic != NMAGIC && \
	28	(ex).a_magic != OMAGIC)
	29
	30	/*
	31	* N_TXTADDR is the address of the first executable instruction: that is,
	32	* the place the pc could begin after an a.out is loaded, in order to run
	33	* the instructions in that a.out. The pc will actually be set to ex.a_entry
	34	* but this is the first place it could possibly reference.
	35	*
	36	* On the SPARC, binaries begin at __LDPGSZ, i.e., page 1.
	37	*/
	38	#define N_TXTADDR(ex) 8192
	39
	40	/* Address of the bottom of the data segment. */
	41	#define N_DATADDR(ex) \
	42	(N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
	43	: __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
	44
	45	/*
	46	* N_TXTOFF is the offset within an a.out file of the first executable
	47	* instruction: that is, the offset in the a.out of the byte that winds
	48	* up at N_TXTADDR.
	49	*
	50	* On the SPARC, the a.out header is included in the executable when running
	51	* a ZMAGIC file (but not for OMAGIC and NMAGIC).
	52	*/
	53	#define N_TXTOFF(ex) ((ex).a_magic == ZMAGIC ? 0 : sizeof(struct exec))
	54
	55	/* Data segment offset. */
	56	#define N_DATOFF(ex) \
	57	(N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
	58	__LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
	59
	60	/* Symbol table offset. */
	61	#define N_SYMOFF(ex) \
	62	(N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
	63	(ex).a_drsize)
	64
65	/* String table offset. */
66	#define N_STROFF(ex) (N_SYMOFF(ex) + (ex).a_syms)
67
68	/* Description of the object file header (a.out format). */
69	struct exec {
70	u_char a_dynamic:1; /* dynamically linked */
71	u_char a_toolversion:7;/* Sun toolset version XXX */
72
73	#define MID_ZERO 0 /* unknown - implementation dependent */
74	#define MID_SUN010 1 /* sun 68010/68020 binary */
75	#define MID_SUN020 2 /* sun 68020-only binary */
76	#define MID_SUN_SPARC 3 /* sparc binary */
77	#define MID_HP200 200 /* hp200 (68010) BSD binary */
78	#define MID_HP300 300 /* hp300 (68020+68881) BSD binary */
79	#define MID_HPUX 0x20C /* hp200/300 HP-UX binary */
80	#define MID_HPUX800 0x20B /* hp800 HP-UX binary */
81	u_char a_mid; /* machine ID */
82
83	#define OMAGIC 0407 /* old impure format */
84	#define NMAGIC 0410 /* read-only text */
85	#define ZMAGIC 0413 /* demand load format */
86	u_short a_magic; /* magic number */
87
88	u_long a_text; /* text segment size */
89	u_long a_data; /* initialized data size */
90	u_long a_bss; /* uninitialized data size */
91	u_long a_syms; /* symbol table size */
92	u_long a_entry; /* entry point */
93	u_long a_trsize; /* text relocation size */
94	u_long a_drsize; /* data relocation size */
95	};
96	#define a_machtype a_mid /* SUN compatibility */