move the kernel to 0x80000000

bootmain.c

@@ -43,7 +43,7 @@ bootmain(void)
 
   // Call the entry point from the ELF header.
   // Does not return!
-  entry = (void(*)(void))(elf->entry & 0xFFFFFF);
+  entry = (void(*)(void))(elf->entry - KERNBASE);
   entry();
 }
 

kernel.ld

@@ -8,7 +8,8 @@ ENTRY(_start)
 SECTIONS
 {
 	/* Load the kernel at this address: "." means the current address */
-	. = 0xF0100000;
+        /* Must be equal to KERNLINK */
+	. = 0x80100000;
 
 	.text : AT(0x100000) {
 		*(.text .stub .text.* .gnu.linkonce.t.*)

memlayout.h

@@ -5,7 +5,7 @@
 #define DEVSPACE 0xFE000000         // Other devices are at high addresses
 
 // Key addresses for address space layout (see kmap in vm.c for the layout)
-#define KERNBASE 0xF0000000         // First kernel virtual address
+#define KERNBASE 0x80000000         // First kernel virtual address
 #define KERNLINK (KERNBASE+EXTMEM)  // Address where kernel is linked
 
 #ifndef __ASSEMBLER__