1 /*- 2 * Copyright (c) 1992 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)reloc.h 7.2 (Berkeley) 2/4/93 34 * from: Header: reloc.h,v 1.6 92/06/20 09:59:37 torek Exp 35 * $Id: reloc.h,v 1.1.1.1 1993/10/12 03:22:41 deraadt Exp $ 36 */ 37 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