Date: Mon, 13 Oct 2008 20:24:04 +0000 (UTC) From: Warner Losh <imp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r183841 - head/libexec/rtld-elf/mips Message-ID: <200810132024.m9DKO4eO085447@svn.freebsd.org>
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Author: imp Date: Mon Oct 13 20:24:03 2008 New Revision: 183841 URL: http://svn.freebsd.org/changeset/base/183841 Log: This code has no copyright. It is fairly obvious to me that we're a derivitive of NetBSD's mips_reloc.c, so pull in the copyright notice from there. Also, a minor tweak to load/store pointers. Other changes from NetBSD likely would be useful too... Obtained from: NetBSD Modified: head/libexec/rtld-elf/mips/reloc.c Modified: head/libexec/rtld-elf/mips/reloc.c ============================================================================== --- head/libexec/rtld-elf/mips/reloc.c Mon Oct 13 20:07:13 2008 (r183840) +++ head/libexec/rtld-elf/mips/reloc.c Mon Oct 13 20:24:03 2008 (r183841) @@ -1,4 +1,33 @@ /* $NetBSD: mdreloc.c,v 1.23 2003/07/26 15:04:38 mrg Exp $ */ +/* $NetBSD: mips_reloc.c,v 1.53 2008/07/24 04:39:25 matt Exp $ */ + +/* + * Copyright 1997 Michael L. Hitch <mhitch@montana.edu> + * Portions copyright 2002 Charles M. Hannum <root@ihack.net> + * 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. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); @@ -35,21 +64,33 @@ void _rtld_relocate_nonplt_self(Elf_Dyn int open(); int _open(); +/* + * It is possible for the compiler to emit relocations for unaligned data. + * We handle this situation with these inlines. + */ +#define RELOC_ALIGNED_P(x) \ + (((uintptr_t)(x) & (sizeof(void *) - 1)) == 0) + static __inline Elf_Addr load_ptr(void *where) { - Elf_Addr res; - - memcpy(&res, where, sizeof(res)); + if (__predict_true(RELOC_ALIGNED_P(where))) + return *(Elf_Addr *)where; + else { + Elf_Addr res; - return (res); + (void)memcpy(&res, where, sizeof(res)); + return res; + } } -void +static __inline void store_ptr(void *where, Elf_Addr val) { - - memcpy(where, &val, sizeof(val)); + if (__predict_true(RELOC_ALIGNED_P(where))) + *(Elf_Addr *)where = val; + else + (void)memcpy(where, &val, sizeof(val)); } void @@ -149,13 +190,6 @@ _mips_rtld_bind(Obj_Entry *obj, Elf_Size } /* - * It is possible for the compiler to emit relocations for unaligned data. - * We handle this situation with these inlines. - */ -#define RELOC_ALIGNED_P(x) \ - (((uintptr_t)(x) & (sizeof(void *) - 1)) == 0) - -/* * Process non-PLT relocations */ int
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