1 /* $NetBSD: reloc.h,v 1.10 2020/07/26 08:08:41 simonb Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)reloc.h 8.1 (Berkeley) 6/10/93 32 * 33 * from: Header: reloc.h,v 1.6 92/06/20 09:59:37 torek Exp 34 */ 35 36 #ifndef __MIPS_RELOC_H__ 37 #define __MIPS_RELOC_H__ 38 /* 39 * MIPS relocation types. 40 */ 41 enum reloc_type { 42 MIPS_RELOC_32, /* 32-bit absolute */ 43 MIPS_RELOC_JMP, /* 26-bit absolute << 2 | high 4 bits of pc */ 44 MIPS_RELOC_WDISP16, /* 16-bit signed pc-relative << 2 */ 45 MIPS_RELOC_HI16, /* 16-bit absolute << 16 */ 46 MIPS_RELOC_HI16_S, /* 16-bit absolute << 16 (+1 if needed) */ 47 MIPS_RELOC_LO16 /* 16-bit absolute */ 48 }; 49 50 /* 51 * MIPS relocation info. 52 * 53 * Symbol-relative relocation is done by: 54 * 1. start with the value r_addend, 55 * 2. locate the appropriate symbol and if defined, add symbol value, 56 * 3. if pc relative, subtract pc, 57 * 4. if the reloc_type is MIPS_RELOC_HI16_S and the result bit 15 is set, 58 * add 0x00010000, 59 * 5. shift down 2 or 16 if necessary. 60 * The resulting value is then to be stuffed into the appropriate bits 61 * in the object (the low 16, or the low 26 bits). 62 */ 63 struct reloc_info_mips { 64 u_long r_address; /* relocation addr (offset in segment) */ 65 u_int r_index:24, /* segment (r_extern==0) or symbol index */ 66 r_extern:1, /* if set, r_index is symbol index */ 67 :2; /* unused */ 68 enum reloc_type r_type:5; /* relocation type, from above */ 69 long r_addend; /* value to add to symbol value */ 70 }; 71 72 #define relocation_info reloc_info_mips 73 #endif /* __MIPS_RELOC_H__ */ 74