diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index 858e432ea5e..d9c6963ec03 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,3 +1,11 @@
+2015-04-21  Mike Frysinger  <vapier@gentoo.org>
+
+	* cgen.sh: Add +x permissions.
+	* genmloop.sh: Likewise.
+	* gentvals.sh: Likewise.
+	* gennltvals.sh (newlibroot): New variable to hold the path to newlib.
+	Change all uses of srcroot for newlib to newlibroot.
+
 2015-04-18  Mike Frysinger  <vapier@gentoo.org>
 
 	* sim-base.h (SIM_CPU): New typedef.
diff --git a/sim/common/cgen.sh b/sim/common/cgen.sh
old mode 100644
new mode 100755
diff --git a/sim/common/genmloop.sh b/sim/common/genmloop.sh
old mode 100644
new mode 100755
diff --git a/sim/common/gennltvals.sh b/sim/common/gennltvals.sh
old mode 100644
new mode 100755
index 81df382e48b..1a9e8532e74
--- a/sim/common/gennltvals.sh
+++ b/sim/common/gennltvals.sh
@@ -9,17 +9,24 @@ srcroot=$2
 cpp=$3
 
 srccom=$srcroot/sim/common
+if [ -d "${srcroot}/newlib" ]; then
+  # If newlib is manually in the same source tree, use it.
+  newlibroot=${srcroot}
+else
+  # Else assume it's alongside the gdb/binutils repo.
+  newlibroot=${srcroot}/../newlib
+fi
 
 echo '/* Newlib/libgloss macro values needed by remote target support.  */'
 echo '/* This file is machine generated by gennltvals.sh.  */'
 
-$shell ${srccom}/gentvals.sh "" errno ${srcroot}/newlib/libc/include \
+$shell ${srccom}/gentvals.sh "" errno ${newlibroot}/newlib/libc/include \
 	"errno.h sys/errno.h" 'E[[:upper:][:digit:]]*' "${cpp}"
 
-$shell ${srccom}/gentvals.sh "" signal ${srcroot}/newlib/libc/include \
+$shell ${srccom}/gentvals.sh "" signal ${newlibroot}/newlib/libc/include \
 	"signal.h sys/signal.h" 'SIG[[:upper:][:digit:]]*' "${cpp}"
 
-$shell ${srccom}/gentvals.sh "" open ${srcroot}/newlib/libc/include \
+$shell ${srccom}/gentvals.sh "" open ${newlibroot}/newlib/libc/include \
 	"fcntl.h sys/fcntl.h sys/_default_fcntl.h" 'O_[[:upper:][:digit:]]*' "${cpp}"
 
 # Unfortunately, each newlib/libgloss port has seen fit to define their own
@@ -30,57 +37,57 @@ $shell ${srccom}/gentvals.sh "" open ${srcroot}/newlib/libc/include \
 # hopefully more targets can use.
 
 dir=libgloss target=bfin
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=newlib/libc/sys/d10v/sys target=d10v
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 # OBSOLETE dir=libgloss target=d30v
-# OBSOLETE $shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+# OBSOLETE $shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 # OBSOLETE 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss/cr16/sys target=cr16
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss target=fr30
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss target=frv
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss/i960 target=i960
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss target=m32r
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss target=mn10200
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss target=mn10300
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss target=msp430
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss target=sparc
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss/v850/sys target=v850
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
 
 dir=libgloss target=lm32
-$shell ${srccom}/gentvals.sh $target sys ${srcroot}/$dir \
+$shell ${srccom}/gentvals.sh $target sys ${newlibroot}/$dir \
 	"syscall.h" 'SYS_[_[:alnum:]]*' "${cpp}"
diff --git a/sim/common/gentvals.sh b/sim/common/gentvals.sh
old mode 100644
new mode 100755