75 lines
3.1 KiB
C
75 lines
3.1 KiB
C
/* $NetBSD: reloc.h,v 1.4 1994/10/26 21:09:59 cgd Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)reloc.h 8.1 (Berkeley) 6/10/93
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*
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* from: Header: reloc.h,v 1.6 92/06/20 09:59:37 torek Exp
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*/
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/*
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* MIPS relocation types.
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*/
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enum reloc_type {
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MIPS_RELOC_32, /* 32-bit absolute */
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MIPS_RELOC_JMP, /* 26-bit absolute << 2 | high 4 bits of pc */
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MIPS_RELOC_WDISP16, /* 16-bit signed pc-relative << 2 */
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MIPS_RELOC_HI16, /* 16-bit absolute << 16 */
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MIPS_RELOC_HI16_S, /* 16-bit absolute << 16 (+1 if needed) */
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MIPS_RELOC_LO16, /* 16-bit absolute */
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};
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/*
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* MIPS relocation info.
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*
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* Symbol-relative relocation is done by:
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* 1. start with the value r_addend,
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* 2. locate the appropriate symbol and if defined, add symbol value,
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* 3. if pc relative, subtract pc,
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* 4. if the reloc_type is MIPS_RELOC_HI16_S and the result bit 15 is set,
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* add 0x00010000,
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* 5. shift down 2 or 16 if necessary.
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* The resulting value is then to be stuffed into the appropriate bits
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* in the object (the low 16, or the low 26 bits).
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*/
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struct reloc_info_pmax {
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u_long r_address; /* relocation addr (offset in segment) */
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u_int r_index:24, /* segment (r_extern==0) or symbol index */
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r_extern:1, /* if set, r_index is symbol index */
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:2; /* unused */
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enum reloc_type r_type:5; /* relocation type, from above */
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long r_addend; /* value to add to symbol value */
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};
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#define relocation_info reloc_info_pmax
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