sys/arch/sparc/include/reloc.h

   1 /*      $NetBSD: reloc.h,v 1.4.22.4 2005/01/17 19:30:19 skrll 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 };