Handle IRQs inside the kernel

libsystem/Makefile

@@ -1,7 +1,5 @@
 include ../make/ufuncs.mk
 
-$(eval $(call add_include,liballoc))
-
 libname := libsystem
 
 include ../make/lib.mk

libsystem/init/__premain.c

@@ -1,4 +1,3 @@
-#include <liballoc.h>
 #include <stdint.h>
 #include <system.h>
 
@@ -7,21 +6,22 @@ extern volatile uint8_t __bss_end[];
 
 extern void app_main (void);
 
+static size_t premain_memset (void* dst, uint8_t b, size_t n) {
+  uint8_t* dst1 = dst;
+  size_t i;
+  for (i = 0; i < n; i++)
+    dst1[i] = b;
+  return i;
+}
+
 static void clear_bss (void) {
-  uint8_t* p = (uint8_t*)__bss_start;
-  while (p < __bss_end) {
-    *p++ = 0;
-  }
+  premain_memset ((void*)__bss_start, 0, (uintptr_t)__bss_end - (uintptr_t)__bss_end);
 }
 
 void __premain (void) {
   clear_bss ();
 
-  liballoc_init ();
-
   app_main ();
 
-  liballoc_deinit ();
-
   quit ();
 }