Home | History | Annotate | Line # | Download | only in include 
      1 /*	$NetBSD: reloc.h,v 1.7 2005/12/11 12:19:06 christos 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. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  *	@(#)reloc.h	8.1 (Berkeley) 6/11/93
     41  */
     42 
     43 /*
     44  * SPARC relocations.  The linker has, unfortunately, a large number
     45  * of link types.
     46  */
     47 enum reloc_type {
     48 		/* architecturally-required types */
     49 	RELOC_8,		/*  8-bit absolute */
     50 	RELOC_16,		/* 16-bit absolute */
     51 	RELOC_32,		/* 32-bit absolute */
     52 	RELOC_DISP8,		/*  8-bit pc-relative */
     53 	RELOC_DISP16,		/* 16-bit pc-relative */
     54 	RELOC_DISP32,		/* 32-bit pc-relative */
     55 	RELOC_WDISP30,		/* 30-bit pc-relative signed word */
     56 	RELOC_WDISP22,		/* 22-bit pc-relative signed word */
     57 	RELOC_HI22,		/* 22-bit `%hi' (ie, sethi %hi(X),%l0) */
     58 	RELOC_22,		/* 22-bit non-%hi (i.e., sethi X,%l0) */
     59 	RELOC_13,		/* 13-bit absolute */
     60 	RELOC_LO10,		/* 10-bit `%lo' */
     61 
     62 		/* gnu ld understands some of these, but I do not */
     63 	RELOC_SFA_BASE,		/* ? */
     64 	RELOC_SFA_OFF13,	/* ? */
     65 	RELOC_BASE10,		/* ? */
     66 	RELOC_BASE13,		/* ? */
     67 	RELOC_BASE22,		/* ? */
     68 
     69 		/* gnu ld does not use these but Sun linker does */
     70 		/* we define them anyway (note that they are included
     71 		   in the freely-available gas sources!) */
     72 		/* actually, newer gnu ld does generate some of these. */
     73 	RELOC_PC10,		/* ? */
     74 	RELOC_PC22,		/* ? */
     75 	RELOC_JMP_TBL,		/* ? */
     76 	RELOC_SEGOFF16,		/* ? */
     77 	RELOC_GLOB_DAT,		/* ? */
     78 	RELOC_JMP_SLOT,		/* ? */
     79 	RELOC_RELATIVE,		/* ? */
     80 	RELOC_UA_32,		/* unaligned 32bit relocation */
     81 
     82 		/* The following are LP64 relocations */
     83 
     84 	RELOC_PLT32,
     85 	RELOC_HIPLT22,
     86 	RELOC_LOPLT10,
     87 	RELOC_PCPLT32,
     88 	RELOC_PCPLT22,
     89 	RELOC_PCPLT10,
     90 
     91 	RELOC_10,
     92 	RELOC_11,
     93 	RELOC_64,
     94 	RELOC_OLO10,
     95 	RELOC_HH22,
     96 
     97 	RELOC_HM10,
     98 	RELOC_LM22,
     99 	RELOC_PC_HH22,
    100 	RELOC_PC_HM10,
    101 	RELOC_PC_LM22,
    102 
    103 	RELOC_WDISP16,
    104 	RELOC_WDISP19,
    105 	RELOC_GLOB_JMP,
    106 	RELOC_7,
    107 	RELOC_5,
    108 	RELOC_6
    109 };
    110 
    111 /*
    112  * SPARC relocation info.
    113  *
    114  * Symbol-relative relocation is done by:
    115  *	1. locating the appropriate symbol
    116  *	2. if defined, adding (value + r_addend), subtracting pc if pc-rel,
    117  *	   and then shifting down 2 or 10 or 13 if necessary.
    118  * The resulting value is then to be stuffed into the appropriate bits
    119  * in the object (the low 22, or the high 30, or ..., etc).
    120  */
    121 struct reloc_info_sparc {
    122 	u_long	r_address;	/* relocation addr (offset in segment) */
    123 	u_int	r_index:24,	/* segment (r_extern==0) or symbol index */
    124 		r_extern:1,	/* if set, r_index is symbol index */
    125 		:2;		/* unused */
    126 	enum reloc_type r_type:5; /* relocation type, from above */
    127 	long	r_addend;	/* value to add to symbol value */
    128 };
    129