1 /* $NetBSD: reloc.h,v 1.4 1994/10/26 21:09:59 cgd 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)reloc.h 8.1 (Berkeley) 6/10/93 36 * 37 * from: Header: reloc.h,v 1.6 92/06/20 09:59:37 torek Exp 38 */ 39 40 /* 41 * MIPS relocation types. 42 */ 43 enum reloc_type { 44 MIPS_RELOC_32, /* 32-bit absolute */ 45 MIPS_RELOC_JMP, /* 26-bit absolute << 2 | high 4 bits of pc */ 46 MIPS_RELOC_WDISP16, /* 16-bit signed pc-relative << 2 */ 47 MIPS_RELOC_HI16, /* 16-bit absolute << 16 */ 48 MIPS_RELOC_HI16_S, /* 16-bit absolute << 16 (+1 if needed) */ 49 MIPS_RELOC_LO16, /* 16-bit absolute */ 50 }; 51 52 /* 53 * MIPS relocation info. 54 * 55 * Symbol-relative relocation is done by: 56 * 1. start with the value r_addend, 57 * 2. locate the appropriate symbol and if defined, add symbol value, 58 * 3. if pc relative, subtract pc, 59 * 4. if the reloc_type is MIPS_RELOC_HI16_S and the result bit 15 is set, 60 * add 0x00010000, 61 * 5. shift down 2 or 16 if necessary. 62 * The resulting value is then to be stuffed into the appropriate bits 63 * in the object (the low 16, or the low 26 bits). 64 */ 65 struct reloc_info_pmax { 66 u_long r_address; /* relocation addr (offset in segment) */ 67 u_int r_index:24, /* segment (r_extern==0) or symbol index */ 68 r_extern:1, /* if set, r_index is symbol index */ 69 :2; /* unused */ 70 enum reloc_type r_type:5; /* relocation type, from above */ 71 long r_addend; /* value to add to symbol value */ 72 }; 73 74 #define relocation_info reloc_info_pmax 75