d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

PowerPC support for kldxref by handling the PPC-specific relocations.

Browse Source
This commit is contained in:
Peter Grehan 2005-03-02 12:27:42 +00:00
parent c21044494f
commit d6029e94fa
1 changed files with 74 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

74
usr.sbin/kldxref/ef_powerpc.c Normal file
View File

@ -0,0 +1,74 @@
/*-
* Copyright (c) 2005 Peter Grehan.
* Copyright 1996-1998 John D. Polstra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <machine/elf.h>
#include <err.h>
#include <errno.h>
#include <string.h>
#include "ef.h"
#include <stdio.h>
/*
* Apply relocations to the values obtained from the file. `relbase' is the
* target relocation address of the section, and `dataoff/len' is the region
* that is to be relocated, and has been copied to *dest
*/
int
ef_reloc(struct elf_file *ef, const void *reldata, int reltype, Elf_Off relbase,
Elf_Off dataoff, size_t len, void *dest)
{
Elf_Addr *where, addr, addend;
Elf_Word rtype, symidx;
const Elf_Rela *rela;
if (reltype != EF_RELOC_RELA)
return (EINVAL);
rela = (const Elf_Rela *)reldata;
where = (Elf_Addr *) ((Elf_Off)dest - dataoff + rela->r_offset);
addend = rela->r_addend;
rtype = ELF_R_TYPE(rela->r_info);
symidx = ELF_R_SYM(rela->r_info);
if ((char *)where < (char *)dest || (char *)where >= (char *)dest + len)
return (0);
switch(rtype) {
case R_PPC_RELATIVE: /* word32 B + A */
*where = relbase + addend;
break;
default:
warnx("unhandled relocation type %d", rtype);
}
return (0);
}