FreeBSD src
The MIPS ABI does not require the second GOT entry to be reserved for use by the runtime linker as on other architectures. Instead, static linkers use a special value in the second GOT entry to indicate if the entry is reserved. This value is supposed to consist of an address with the MSB set and the rest of the bits all zero which is an invalid user address. However, the old binutils currently in the tree uses the 32-bit mask value (2^31) on 64-bit MIPS instead of 2^63. This was fixed in upstream binutils in 2008 to use 2^63 on 64-bit MIPS. The first part of this change changes the runtime check in init_pltgot() to check for both values (2^31 and 2^63) when deciding whether to store the current object pointer in GOT[1] which fixes dynamic N64 binaries compiled with modern binutils. However, the initial version of this fix exposed another related bug in that _rtld_relocate_nonplt_self() was only checking for the new value (2^63) in GOT[1] and incorrectly treated GOT[1] as a local GOT entry (and did not relocate the final local GOT entry). To handle this, fix all of the places that check for GOT[1]'s status to use the same macro that checks for both values on N64. Reviewed by: kan, imp Sponsored by: DARPA / AFRL Differential Revision: https://reviews.freebsd.org/D9708 |
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bin | ||
cddl | ||
contrib | ||
crypto | ||
etc | ||
gnu | ||
include | ||
kerberos5 | ||
lib | ||
libexec | ||
release | ||
rescue | ||
sbin | ||
secure | ||
share | ||
sys | ||
targets | ||
tests | ||
tools | ||
usr.bin | ||
usr.sbin | ||
.arcconfig | ||
.arclint | ||
COPYRIGHT | ||
LOCKS | ||
MAINTAINERS | ||
Makefile | ||
Makefile.inc1 | ||
Makefile.libcompat | ||
ObsoleteFiles.inc | ||
README | ||
UPDATING |
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7) and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The `buildkernel` and `installkernel` targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process. See build(7), config(8), and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information. Note: If you want to build and install the kernel with the `buildkernel` and `installkernel` targets, you might need to build world before. More information is available in the handbook. The kernel configuration files reside in the sys/<arch>/conf sub-directory. GENERIC is the default configuration used in release builds. NOTES contains entries and documentation for all possible devices, not just those commonly used. Source Roadmap: --------------- bin System/user commands. cddl Various commands and libraries under the Common Development and Distribution License. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tests Regression tests which can be run by Kyua. See tests/README for additional information. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html