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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <string.h>
#include "machdep.h"
#include "reloc.h"
#include "_librtld.h"
#include "_elf.h"
/*
* Undo relocations that have been applied to a memory image. Basically this
* involves copying the original files relocation offset into the new image
* being created.
*/
/* ARGSUSED3 */
void
undo_reloc(void *vrel, uchar_t *oaddr, uchar_t *iaddr, Reloc *reloc)
{
Rela *rel = vrel;
const Rel_entry *rep;
Xword rtype = ELF_R_TYPE(rel->r_info, M_MACH);
ulong_t *_oaddr;
ulong_t *_iaddr;
switch (rtype) {
case R_SPARC_NONE:
break;
case R_SPARC_COPY:
(void) memset((void *)oaddr, 0, (size_t)reloc->r_size);
break;
case R_SPARC_JMP_SLOT:
/* LINTED */
_oaddr = (unsigned long *)oaddr;
/* LINTED */
_iaddr = (unsigned long *)iaddr;
if (_iaddr) {
*_oaddr++ = *_iaddr++;
*_oaddr++ = *_iaddr++;
*_oaddr = *_iaddr;
} else {
*_oaddr++ = 0;
*_oaddr++ = 0;
*_oaddr = 0;
}
break;
default:
rep = &reloc_table[rtype];
if (iaddr)
(void) memcpy(oaddr, iaddr, rep->re_fsize);
else
(void) memset(oaddr, 0, rep->re_fsize);
}
}
/*
* Copy a relocation record and increment its value. The record must reflect
* the new address to which this image is fixed.
*/
/* ARGSUSED3 */
void
inc_reloc(void *vnrel, void *vorel, Reloc *reloc, uchar_t *oaddr,
uchar_t *iaddr)
{
Rela *nrel = vnrel;
Rela *orel = vorel;
*nrel = *orel;
nrel->r_offset += reloc->r_value;
}
/*
* Clear a relocation record. The relocation has been applied to the image and
* thus the relocation must not occur again.
*/
void
clear_reloc(void *vrel)
{
Rela *rel = vrel;
rel->r_offset = 0;
rel->r_info = ELF_R_INFO(0, R_SPARC_NONE);
rel->r_addend = 0;
}
/*
* Apply a relocation to an image being built from an input file. Use the
* runtime linkers routines to do the necessary magic.
*/
void
apply_reloc(void *vrel, Reloc *reloc, const char *name, uchar_t *oaddr,
Rt_map *lmp)
{
Rela *rel = vrel;
Xword type = ELF_R_TYPE(rel->r_info, M_MACH);
Xword value = reloc->r_value + rel->r_addend;
if (type == R_SPARC_JMP_SLOT) {
uintptr_t addr, vaddr;
if (FLAGS(lmp) & FLG_RT_FIXED)
vaddr = 0;
else
vaddr = ADDR(lmp);
addr = (uintptr_t)oaddr - rel->r_offset;
/* LINTED */
(void) elf_plt_write((uintptr_t)addr, vaddr, rel,
(uintptr_t)value, reloc->r_pltndx);
} else if (type == R_SPARC_COPY) {
(void) memcpy((void *)oaddr, (void *)value,
(size_t)reloc->r_size);
} else {
if (IS_EXTOFFSET(type))
value += ELF_R_TYPE_DATA(rel->r_info);
(void) do_reloc_rtld(type, oaddr, &value, reloc->r_name, name,
LIST(lmp));
}
}
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