1eed250ad8
on variables read out of raw kld files. Unlike other platforms the value will be in an Elf_Rela, not in the data section of the elf file. Submitted by: Hartmut Brandt <brandt@fokus.gmd.de> PR: 46730 Tested on: alpha (obrien), i386, sparc64
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/*-
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* Copyright (c) 2003 Jake Burkholder.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <machine/elf.h>
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#include <err.h>
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#include <string.h>
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#include "ef.h"
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/*
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* Apply relocations to the values we got from the file.
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*/
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int
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ef_reloc(elf_file_t ef, Elf_Off offset, size_t len, void *dest)
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{
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const Elf_Rela *a;
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Elf_Word w;
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for (a = ef->ef_rela; a < &ef->ef_rela[ef->ef_relasz]; a++) {
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if (a->r_offset >= offset && a->r_offset < offset + len) {
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switch (ELF_R_TYPE(a->r_info)) {
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case R_SPARC_RELATIVE:
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/* load address is 0 */
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w = a->r_addend;
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memcpy((u_char *)dest + (a->r_offset - offset),
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&w, sizeof(w));
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break;
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default:
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warnx("unhandled relocation type %u",
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ELF_R_TYPE(a->r_info));
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break;
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}
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}
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}
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return (0);
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}
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