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reloc.h revision 1.2 
      1 /*	$NetBSD: reloc.h,v 1.2 1994/11/20 20:53:30 deraadt Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This software was developed by the Computer Systems Engineering group
      8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9  * contributed to Berkeley.
     10  *
     11  * All advertising materials mentioning features or use of this software
     12  * must display the following acknowledgement:
     13  *	This product includes software developed by the University of
     14  *	California, Lawrence Berkeley Laboratory.
     15  *
     16  * Redistribution and use in source and binary forms, with or without
     17  * modification, are permitted provided that the following conditions
     18  * are met:
     19  * 1. Redistributions of source code must retain the above copyright
     20  *    notice, this list of conditions and the following disclaimer.
     21  * 2. Redistributions in binary form must reproduce the above copyright
     22  *    notice, this list of conditions and the following disclaimer in the
     23  *    documentation and/or other materials provided with the distribution.
     24  * 3. All advertising materials mentioning features or use of this software
     25  *    must display the following acknowledgement:
     26  *	This product includes software developed by the University of
     27  *	California, Berkeley and its contributors.
     28  * 4. Neither the name of the University nor the names of its contributors
     29  *    may be used to endorse or promote products derived from this software
     30  *    without specific prior written permission.
     31  *
     32  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     33  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     34  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     35  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     36  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     40  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     41  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     42  * SUCH DAMAGE.
     43  *
     44  *	@(#)reloc.h	8.1 (Berkeley) 6/11/93
     45  */
     46 
     47 /*
     48  * SPARC relocations.  The linker has, unfortunately, a large number
     49  * of link types.  We do not do dynamic linking (yet?) but we define
     50  * the dynamic link types.
     51  */
     52 enum reloc_type {
     53 		/* architecturally-required types */
     54 	RELOC_8,		/*  8-bit absolute */
     55 	RELOC_16,		/* 16-bit absolute */
     56 	RELOC_32,		/* 32-bit absolute */
     57 	RELOC_DISP8,		/*  8-bit pc-relative */
     58 	RELOC_DISP16,		/* 16-bit pc-relative */
     59 	RELOC_DISP32,		/* 32-bit pc-relative */
     60 	RELOC_WDISP30,		/* 30-bit pc-relative signed word */
     61 	RELOC_WDISP22,		/* 22-bit pc-relative signed word */
     62 	RELOC_HI22,		/* 22-bit `%hi' (ie, sethi %hi(X),%l0) */
     63 	RELOC_22,		/* 22-bit non-%hi (i.e., sethi X,%l0) */
     64 	RELOC_13,		/* 13-bit absolute */
     65 	RELOC_LO10,		/* 10-bit `%lo' */
     66 
     67 		/* gnu ld understands some of these, but I do not */
     68 	RELOC_SFA_BASE,		/* ? */
     69 	RELOC_SFA_OFF13,	/* ? */
     70 	RELOC_BASE10,		/* ? */
     71 	RELOC_BASE13,		/* ? */
     72 	RELOC_BASE22,		/* ? */
     73 
     74 		/* gnu ld does not use these but Sun linker does */
     75 		/* we define them anyway (note that they are included
     76 		   in the freely-available gas sources!) */
     77 	RELOC_PC10,		/* ? */
     78 	RELOC_PC22,		/* ? */
     79 	RELOC_JMP_TBL,		/* ? */
     80 	RELOC_SEGOFF16,		/* ? */
     81 	RELOC_GLOB_DAT,		/* ? */
     82 	RELOC_JMP_SLOT,		/* ? */
     83 	RELOC_RELATIVE,		/* ? */
     84 };
     85 
     86 /*
     87  * SPARC relocation info.
     88  *
     89  * Symbol-relative relocation is done by:
     90  *	1. locating the appropriate symbol
     91  *	2. if defined, adding (value + r_addend), subtracting pc if pc-rel,
     92  *	   and then shifting down 2 or 10 or 13 if necessary.
     93  * The resulting value is then to be stuffed into the appropriate bits
     94  * in the object (the low 22, or the high 30, or ..., etc).
     95  */
     96 struct reloc_info_sparc {
     97 	u_long	r_address;	/* relocation addr (offset in segment) */
     98 	u_int	r_index:24,	/* segment (r_extern==0) or symbol index */
     99 		r_extern:1,	/* if set, r_index is symbol index */
    100 		:2;		/* unused */
    101 	enum reloc_type r_type:5; /* relocation type, from above */
    102 	long	r_addend;	/* value to add to symbol value */
    103 };
    104