Various updates.

* Removed some variants of the SYS_GETINFO calls from the kernel;
  replaced them with new PM and utils libary functionality. Fixed
  bugs in utils library that used old get_kenv() variant.
* Implemented a buffer in the kernel to gather random data.
  Memory driver periodically checks this for /dev/random.
  A better random algorithm can now be implemented in the driver.
  Removed SYS_RANDOM; the SYS_GETINFO call is used instead.
* Remove SYS_KMALLOC from the kernel. Memory allocation can now
  be done at the process manager with new 'other' library functions.

lib/syscall/Makefile

@@ -9,6 +9,8 @@ OBJECTS	= \
 	$(LIBRARY)(_exit.o) \
 	$(LIBRARY)(access.o) \
 	$(LIBRARY)(alarm.o) \
+	$(LIBRARY)(allocmem.o) \
+	$(LIBRARY)(freemem.o) \
 	$(LIBRARY)(brk.o) \
 	$(LIBRARY)(cfgetispeed.o) \
 	$(LIBRARY)(cfgetospeed.o) \
@@ -117,6 +119,12 @@ $(LIBRARY)(access.o):	access.s
 $(LIBRARY)(alarm.o):	alarm.s
 	$(CC1) alarm.s
 
+$(LIBRARY)(allocmem.o):	allocmem.s
+	$(CC1) allocmem.s
+
+$(LIBRARY)(freemem.o):	freemem.s
+	$(CC1) freemem.s
+
 $(LIBRARY)(brk.o):	brk.s
 	$(CC1) brk.s
 

lib/syscall/allocmem.s

@@ -0,0 +1,7 @@
+.sect .text
+.extern	__allocmem
+.define	_allocmem
+.align 2
+
+_allocmem:
+	jmp	__allocmem

lib/syscall/freemem.s

@@ -0,0 +1,7 @@
+.sect .text
+.extern	__freemem
+.define	_freemem
+.align 2
+
+_freemem:
+	jmp	__freemem