_relocate.c revision 5aefb6555731130ca4fd295960123d71f2d21fe8
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * CDDL HEADER START
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * The contents of this file are subject to the terms of the
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * Common Development and Distribution License (the "License").
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * You may not use this file except in compliance with the License.
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * or http://www.opensolaris.org/os/licensing.
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * See the License for the specific language governing permissions
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * and limitations under the License.
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * When distributing Covered Code, include this CDDL HEADER in each
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * information: Portions Copyright [yyyy] [name of copyright owner]
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * Use is subject to license terms.
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems#pragma ident "%Z%%M% %I% %E% SMI"
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems#include "_librtld.h"
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * Undo relocations that have been applied to a memory image. Basically this
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * involves copying the original files relocation offset into the new image
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystemsundo_reloc(void *vrel, uchar_t *oaddr, uchar_t *iaddr, Reloc *reloc)
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems const Rel_entry *rep;
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems Xword rtype = ELF_R_TYPE(rel->r_info);
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems (void) memset((void *)oaddr, 0, (size_t)reloc->r_size);
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems case R_AMD64_JUMP_SLOT:
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems _oaddr = (unsigned long *)oaddr;
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems _iaddr = (unsigned long *)iaddr;
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems *_oaddr++ = *_iaddr++;
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems *_oaddr++ = *_iaddr++;
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems rep = &reloc_table[rtype];
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems (void) memcpy(oaddr, iaddr, rep->re_fsize);
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems (void) memset(oaddr, 0, rep->re_fsize);
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * Copy a relocation record and increment its value. The record must reflect
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * the new address to which this image is fixed.
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystemsinc_reloc(void *vnrel, void *vorel, Reloc *reloc, uchar_t *oaddr,
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems nrel->r_offset += reloc->r_value;
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * Clear a relocation record. The relocation has been applied to the image and
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * thus the relocation must not occur again.
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystemsclear_reloc(void *vrel)
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems rel->r_info = ELF_R_INFO(0, R_AMD64_NONE);
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * Apply a relocation to an image being built from an input file. Use the
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems * runtime linkers routines to do the necessary magic.
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystemsapply_reloc(void *vrel, Reloc *reloc, const char *name, uchar_t *oaddr,
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems Xword type = ELF_R_TYPE(rel->r_info);
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems Xword value = reloc->r_value + rel->r_addend;
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems if (type == R_AMD64_JUMP_SLOT) {
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems uintptr_t addr, vaddr;
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems if (FLAGS(lmp) & FLG_RT_FIXED)
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems addr = (uintptr_t)oaddr - rel->r_offset;
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems elf_plt_write((uintptr_t)addr, vaddr, rel,
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems (uintptr_t)value, reloc->r_pltndx);
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems } else if (type == R_AMD64_COPY) {
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems (void) memcpy((void *)oaddr, (void *)value,
15db28971f91c98efb449aebf46024ac72779fa3Krishnendu Sadhukhan - Sun Microsystems (size_t)reloc->r_size);