patches/glibc/2.5.1/140-i386-preferred-stack-boundary.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Mon Feb 21 23:39:46 2011 +0100 (2011-02-21)
changeset 2312 8b9938edd3d8
parent 744 4bf8448536d5
permissions -rw-r--r--
libc/glibc: add fortify option

By default, recent versions of glibc and eglibc will build some
functions that take format strings (eg. printf, syslog...) with
run-time checks against some format string attacks. This is
called a fortified build.

Unfortunately, this fails somehow while building the instrumented
version of syslog, with some kind of circular dependency...

Disable fortified builds by default, and hide the enabling option
behind EXPERIMENTAL for daring users...

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
yann@402
     1
(C) 2007 Yann E. MORIN <yann.morin.1998@anciens.enib.fr>
yann@402
     2
License: LGPL v2.1
yann@402
     3
yann@402
     4
Shut off a stupid warning: preffered-stack-boundary must be between 4 ad 12,
yann@402
     5
and 2 is not.
yann@402
     6
yann@402
     7
diff -dur glibc-2.5.orig/sysdeps/i386/Makefile glibc-2.5/sysdeps/i386/Makefile
yann@402
     8
--- glibc-2.5.orig/sysdeps/i386/Makefile	2005-03-06 01:18:16.000000000 +0100
yann@402
     9
+++ glibc-2.5/sysdeps/i386/Makefile	2007-05-27 17:49:37.000000000 +0200
yann@402
    10
@@ -36,7 +36,7 @@
yann@402
    11
 ifeq ($(subdir),csu)
yann@402
    12
 sysdep-CFLAGS += -mpreferred-stack-boundary=4
yann@402
    13
 else
yann@402
    14
-sysdep-CFLAGS += -mpreferred-stack-boundary=2
yann@402
    15
+sysdep-CFLAGS += -mpreferred-stack-boundary=4
yann@402
    16
 # Likewise, any function which calls user callbacks
yann@402
    17
 uses-callbacks += -mpreferred-stack-boundary=4
yann@402
    18
 # Likewise, any stack alignment tests