fixed assembly code to compile with gcc 4.0.3. the original code was invalid, as there is no mov instruction to

move a 16 bit segment register into 32 bit memory location, and movzx (called movzwl within gcc) doesn't work with 
segement registers.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18864 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/arch/x86/arch_x86.S

@@ -222,10 +222,15 @@ FUNCTION(arch_debug_save_registers):
 	popl	%eax
 	movl	%eax, 36(%esi)
 
-	movl	%cs, 40(%esi)
-	movl	%ss, 44(%esi)
-	movl	%ds, 48(%esi)
-	movl	%es, 52(%esi)
+	xor	%eax, %eax
+	movw	%cs, %ax
+	movl	%eax, 40(%esi)
+	movw	%ss, %ax
+	movl	%eax, 44(%esi)
+	movw	%ds, %ax
+	movl	%eax, 48(%esi)
+	movw	%es, %ax
+	movl	%eax, 52(%esi)
 
 	popl	%eax
 	popl	%esi