I can't build j2se on sparcv9 because of this problem. The diagnostics
printed by the VM are:

Java HotSpot(TM) 64-Bit Server VM warning: Attempt to protect stack guard pages failed.
Java HotSpot(TM) 64-Bit Server VM warning: Attempt to unprotect stack guard pages failed.

These diagnostics are getting placed into a file that is needed as part
of the build, causing the build to fail. Here is the tail end of my build:

/usr/bin/mkdir -p ../../../build/solaris-sparc/tmp/sun/sun.io/reorder
../../../build/solaris-sparc/bin/sparcv9/javac -d ../../../build/solaris-sparc/tmp/sun/sun.io/reorder ../../tools/reorder/JarReorder.java
cd ../../../build/solaris-sparc/tmp/sun/sun.io/classes ; /net/frog/gafter/jdk-launcher/build/solaris-sparc/bin/sparcv9/java -classpath /net/frog/gafter/jdk-launcher/build/solaris-sparc/tmp/sun/sun.io/reorder JarReorder /net/frog/gafter/jdk-launcher/make/tools/reorder/reorder_charsets_jar-solaris - sun > /net/frog/gafter/jdk-launcher/build/solaris-sparc/tmp/sun/sun.io/reorder/file_list
cd ../../../build/solaris-sparc/tmp/sun/sun.io/classes ; /net/frog/gafter/jdk-launcher/build/solaris-sparc/bin/sparcv9/jar cf /net/frog/gafter/jdk-launcher/build/solaris-sparc/lib/charsets.jar @/net/frog/gafter/jdk-launcher/build/solaris-sparc/tmp/sun/sun.io/reorder/file_list
Java : no such file or directory
HotSpot(TM) : no such file or directory
64-Bit : no such file or directory
Server : no such file or directory
VM : no such file or directory
warning: : no such file or directory
Attempt : no such file or directory
to : no such file or directory
protect : no such file or directory
stack : no such file or directory
guard : no such file or directory
pages : no such file or directory
failed. : no such file or directory
Java : no such file or directory
HotSpot(TM) : no such file or directory
64-Bit : no such file or directory
Server : no such file or directory
VM : no such file or directory
warning: : no such file or directory
Attempt : no such file or directory
to : no such file or directory
unprotect : no such file or directory
stack : no such file or directory
guard : no such file or directory
pages : no such file or directory
failed. : no such file or directory
gnumake[3]: *** [../../../build/solaris-sparc/lib/charsets.jar] Error 1
gnumake[3]: Leaving directory `/net/frog/gafter/jdk-launcher/make/sun/io'
gnumake[2]: *** [optimized] Error 2
gnumake[2]: Leaving directory `/net/frog/gafter/jdk-launcher/make/sun/io'
gnumake[1]: *** [all] Error 1
gnumake[1]: Leaving directory `/net/frog/gafter/jdk-launcher/make/sun'
gnumake: *** [all] Error 1