1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <string.h> 30 #include "machdep.h" 31 #include "reloc.h" 32 #include "_librtld.h" 33 #include "_elf.h" 34 35 36 /* 37 * Undo relocations that have been applied to a memory image. Basically this 38 * involves copying the original files relocation offset into the new image 39 * being created. 40 */ 41 void 42 undo_reloc(void *vrel, unsigned char *oaddr, unsigned char *iaddr, 43 Reloc *reloc) 44 { 45 #if 0 /* XX64 -- fix me */ 46 Rel *rel = vrel; 47 /* LINTED */ 48 unsigned long *_oaddr = (unsigned long *)oaddr; 49 /* LINTED */ 50 unsigned long *_iaddr = (unsigned long *)iaddr; 51 52 switch (ELF_R_TYPE(rel->r_info)) { 53 case R_386_NONE: 54 break; 55 56 case R_386_COPY: 57 (void) memset((void *)oaddr, 0, (size_t)reloc->r_size); 58 break; 59 60 case R_386_JMP_SLOT: 61 if (_iaddr) 62 *_oaddr = *_iaddr + reloc->r_value; 63 else 64 *_oaddr = reloc->r_value; 65 break; 66 67 default: 68 if (_iaddr) 69 *_oaddr = *_iaddr; 70 else 71 *_oaddr = 0; 72 break; 73 } 74 #endif /* XX64 -- fix me */ 75 } 76 77 78 /* 79 * Copy a relocation record and increment its value. The record must reflect 80 * the new address to which this image is fixed. Note that .got entries 81 * associated with .plt's must be fixed to the new base address. 82 */ 83 void 84 inc_reloc(void *vnrel, void *vorel, Reloc *reloc, unsigned char *oaddr, 85 unsigned char *iaddr) 86 { 87 #if 0 /* XX64 -- fix me */ 88 Rel *nrel = vnrel; 89 Rel *orel = vorel; 90 /* LINTED */ 91 unsigned long *_oaddr = (unsigned long *)oaddr; 92 /* LINTED */ 93 unsigned long *_iaddr = (unsigned long *)iaddr; 94 95 if (ELF_R_TYPE(nrel->r_info) == R_386_JMP_SLOT) { 96 if (_iaddr) 97 *_oaddr = *_iaddr + reloc->r_value; 98 else 99 *_oaddr = reloc->r_value; 100 } 101 102 *nrel = *orel; 103 nrel->r_offset += reloc->r_value; 104 #endif /* XX64 -- fix me */ 105 } 106 107 108 /* 109 * Clear a relocation record. The relocation has been applied to the image and 110 * thus the relocation must not occur again. 111 */ 112 void 113 clear_reloc(void * vrel) 114 { 115 #if 0 /* XX64 -- fix me */ 116 Rel * rel = vrel; 117 118 rel->r_offset = 0; 119 rel->r_info = ELF_R_INFO(0, R_386_NONE); 120 #endif /* XX64 -- fix me */ 121 } 122 123 124 /* 125 * Apply a relocation to an image being built from an input file. Use the 126 * runtime linkers routines to do the necessary magic. 127 */ 128 void 129 apply_reloc(void *vrel, Reloc *reloc, const char *name, 130 unsigned char *oaddr, Rt_map *lmp) 131 { 132 #if 0 /* XX64 -- fix me */ 133 Rel *rel = vrel; 134 Byte type = ELF_R_TYPE(rel->r_info); 135 Word value = reloc->r_value; 136 137 if (type == R_386_JMP_SLOT) { 138 uintptr_t addr, vaddr; 139 140 if (FLAGS(lmp) & FLG_RT_FIXED) 141 vaddr = 0; 142 else 143 vaddr = ADDR(lmp); 144 addr = (uintptr_t)oaddr - rel->r_offset; 145 /* LINTED */ 146 elf_plt_write((uintptr_t)addr, vaddr, rel, 147 (uintptr_t)value, reloc->r_pltndx); 148 } else if (type == R_386_COPY) { 149 (void) memcpy((void *)oaddr, (void *)value, 150 (size_t)reloc->r_size); 151 152 } else { 153 (void) do_reloc(type, oaddr, &value, reloc->r_name, name); 154 } 155 #endif /* XX64 -- fix me */ 156 } 157