scnhdr.h

早期freebsd实现

/*
 * Copyright (c) 1988 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Computer Consoles Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)scnhdr.h	5.3 (Berkeley) 6/1/90
 */

struct scnhdr {
	char		s_name[8];	/* section name */
	long		s_paddr;	/* physical address */
	long		s_vaddr;	/* virtual address */
	long		s_size;		/* section size */
	long		s_scnptr;	/* file ptr to raw data for section */
	long		s_relptr;	/* file ptr to relocation */
	long		s_lnnoptr;	/* file ptr to line numbers */
	unsigned short	s_nreloc;	/* number of relocation entries */
	unsigned short	s_nlnno;	/* number of line number entries */
	long		s_flags;	/* flags */
	};

#define	SCNHDR	struct scnhdr
#define	SCNHSZ	sizeof(SCNHDR)




/*
 * Define constants for names of "special" sections
 */

#define _TEXT ".text"
#define _DATA ".data"
#define _BSS  ".bss"
#define _TV  ".tv"




/*
 * The low 4 bits of s_flags is used as a section "type"
 */

#define STYP_REG	0x00		/* "regular" section:
						allocated, relocated, loaded */
#define STYP_DSECT	0x01		/* "dummy" section:
						not allocated, relocated,
						not loaded */
#define STYP_NOLOAD	0x02		/* "noload" section:
						allocated, relocated,
						 not loaded */
#define STYP_GROUP	0x04		/* "grouped" section:
						formed of input sections */
#define STYP_PAD	0x08		/* "padding" section:
						not allocated, not relocated,
						 loaded */
#define STYP_COPY	0x10		/* "copy" section:
						for decision function used
						by field update;  not
						allocated, not relocated,
						loaded;  reloc & lineno
						entries processed normally */
#define	STYP_TEXT	0x20		/* section contains text only */
#define STYP_DATA	0x40		/* section contains data only */
#define STYP_BSS	0x80		/* section contains bss only */

/*
 *  In a minimal file or an update file, a new function
 *  (as compared with a replaced function) is indicated by S_NEWFCN
 */

#define S_NEWFCN  0x10

/*
 * In 3b Update Files (output of ogen), sections which appear in SHARED
 * segments of the Pfile will have the S_SHRSEG flag set by ogen, to inform
 * dufr that updating 1 copy of the proc. will update all process invocations.
 */

#define S_SHRSEG	0x20