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