Index: lib/msun/src/e_powf.c
===================================================================
--- lib/msun/src/e_powf.c
+++ lib/msun/src/e_powf.c
@@ -136,7 +136,7 @@
     /* |y| is huge */
 	if(iy>0x4d000000) { /* if |y| > 2**27 */
 	/* over/underflow if x is not close to one */
-	    if(ix<0x3f7ffff7) return (hy<0)? sn*huge*huge:sn*tiny*tiny;
+	    if(ix<0x3f7ffff6) return (hy<0)? sn*huge*huge:sn*tiny*tiny;
 	    if(ix>0x3f800007) return (hy>0)? sn*huge*huge:sn*tiny*tiny;
 	/* now |1-x| is tiny <= 2**-20, suffice to compute
 	   log(x) by x-x^2/2+x^3/3-x^4/4 */
Index: sys/arm64/conf/std.arm64
===================================================================
--- sys/arm64/conf/std.arm64
+++ sys/arm64/conf/std.arm64
@@ -65,20 +65,20 @@
 options 	INTRNG
 options 	LINUX_BOOT_ABI		# Boot using booti command from U-Boot
 
-# Debugging support.  Always need this:
-options 	KDB			# Enable kernel debugger support.
-options 	KDB_TRACE		# Print a stack trace for a panic.
-# For full debugger support use (turn off in stable branch):
-options 	DDB			# Support DDB.
-options 	GDB			# Support remote GDB.
-options 	DEADLKRES		# Enable the deadlock resolver
-options 	INVARIANTS		# Enable calls of extra sanity checking
-options 	INVARIANT_SUPPORT	# Extra sanity checks of internal structures, required by INVARIANTS
-options 	WITNESS			# Enable checks to detect deadlocks and cycles
-options 	WITNESS_SKIPSPIN	# Don't run witness on spinlocks for speed
-options 	MALLOC_DEBUG_MAXZONES=8	# Separate malloc(9) zones
-options 	ALT_BREAK_TO_DEBUGGER	# Enter debugger on keyboard escape sequence
-options 	VERBOSE_SYSINIT=0	# Support debug.verbose_sysinit, off by default
+## Debugging support.  Always need this:
+#options 	KDB			# Enable kernel debugger support.
+#options 	KDB_TRACE		# Print a stack trace for a panic.
+## For full debugger support use (turn off in stable branch):
+#options 	DDB			# Support DDB.
+#options 	GDB			# Support remote GDB.
+#options 	DEADLKRES		# Enable the deadlock resolver
+#options 	INVARIANTS		# Enable calls of extra sanity checking
+#options 	INVARIANT_SUPPORT	# Extra sanity checks of internal structures, required by INVARIANTS
+#options 	WITNESS			# Enable checks to detect deadlocks and cycles
+#options 	WITNESS_SKIPSPIN	# Don't run witness on spinlocks for speed
+#options 	MALLOC_DEBUG_MAXZONES=8	# Separate malloc(9) zones
+#options 	ALT_BREAK_TO_DEBUGGER	# Enter debugger on keyboard escape sequence
+#options 	VERBOSE_SYSINIT=0	# Support debug.verbose_sysinit, off by default
 
 # Kernel Sanitizers
 #options 	COVERAGE		# Generic kernel coverage. Used by KCOV