X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=arch%2Fx86%2Fxen%2Fxen-head.S;h=7f8d8abf4c1ab8b1ea114fee0365f1505b81aeea;hb=d88f48e12821ab4b2244124d50ac094568f48db5;hp=b65f59a358a220fac788fef178fa3bc2e6dbc8d6;hpb=dc5bc3f1e3d886ce1193281bb2bfb2b44f4aeae4;p=cascardo%2Flinux.git

diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index b65f59a358a2..7f8d8abf4c1a 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -26,7 +26,7 @@
 		      (1 << XENFEAT_auto_translated_physmap) | \
 		      (1 << XENFEAT_supervisor_mode_kernel) | \
 		      (1 << XENFEAT_hvm_callback_vector))
-/* The XENFEAT_writable_page_tables is not stricly neccessary as we set that
+/* The XENFEAT_writable_page_tables is not stricly necessary as we set that
  * up regardless whether this CONFIG option is enabled or not, but it
  * clarifies what the right flags need to be.
  */
@@ -38,13 +38,18 @@
 	__INIT
 ENTRY(startup_xen)
 	cld
-#ifdef CONFIG_X86_32
-	mov %esi,xen_start_info
-	mov $init_thread_union+THREAD_SIZE,%esp
-#else
-	mov %rsi,xen_start_info
-	mov $init_thread_union+THREAD_SIZE,%rsp
-#endif
+
+	/* Clear .bss */
+	xor %eax,%eax
+	mov $__bss_start, %_ASM_DI
+	mov $__bss_stop, %_ASM_CX
+	sub %_ASM_DI, %_ASM_CX
+	shr $__ASM_SEL(2, 3), %_ASM_CX
+	rep __ASM_SIZE(stos)
+
+	mov %_ASM_SI, xen_start_info
+	mov $init_thread_union+THREAD_SIZE, %_ASM_SP
+
 	jmp xen_start_kernel
 
 	__FINIT