Fix LLVM build.

Makefile

@@ -26,14 +26,14 @@ ASMFLAGS = -m32 -ffreestanding -c -g -I.
 ifeq ($(LLVM),on)
 
 ifeq ($(OS),Darwin)
-	LD=PATH=/usr/local/opt/llvm/bin:$(PATH) ld.lld
+	LD=PATH=/usr/local/opt/llvm/bin:"$(PATH)" ld.lld
 else
 	LD=ld.lld
 endif
 
 CC=clang
 CFLAGS += -target elf-i386
-ASMFLAGS = -target elf-i386 -ffreestanding -c -g
+ASMFLAGS += -target elf-i386
 LDKERNELFLAGS = --script=script.ld
 endif
 

mbr.S

@@ -3,16 +3,6 @@
     .code16
     .global _start
 _start:
-    mov $banner, %si
-    call print_string
-
-    call switch_to_32bit
-
-    hlt
-    jmp . // loop forever
-
-
-switch_to_32bit:
     mov	$2, %al
     out	%al, $0x92          // enable A20
 
@@ -39,24 +29,6 @@ init_32bit:
     call bootmain           // 7. load and run kernel
     jmp .                   // 8. loop forever
 
-
-.code16
-print_string:
-    mov $0x0e, %ah  // "teletype output"
-repeat:
-    lodsb           // equivalent to mov (%si), %al; inc %si
-
-    test %al, %al
-    je done
-
-    int $0x10       // bios interrupt
-    jmp repeat
-done:
-    ret
-
-banner:
-    .asciz "Loader \n"
-
     .balign 4
 gdt_start:
     .quad 0x0 // null descriptor

proc.c

@@ -23,8 +23,8 @@ struct kstack {
 
 struct task {
     struct taskstate tss;
-    struct kstack stack;
     pde_t *pgdir;
+    struct kstack stack;
 };
 
 struct vm {