mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-26 11:47:31 +00:00
Code Issues Releases Activity

Add support for relocating AArch64 modules to kldxref. This fixes an error

Browse Source 
message where it fails to read the module as the unrelocated addresses
are zero.

Sponsored by:	ABT Systems Ltd
This commit is contained in:
Andrew Turner 2016-01-13 21:34:15 +00:00
parent fe8e65ae3d
commit f5e45e53f9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=293852
1 changed files with 77 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
usr.sbin/kldxref/ef_aarch64.c Normal file
View File

@ -0,0 +1,77 @@
/*-
* 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, addend;
Elf_Size 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_AARCH64_RELATIVE:
*where = relbase + addend;
break;
case R_AARCH64_ABS64:
break;
default:
warnx("unhandled relocation type %lu", rtype);
break;
}
return (0);
}