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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
commitd635711daa98be86d4c7fd01499c34f566b54ccb (patch)
treeaa5cc3760a27c3d57146498cb82fa549547de06c /arch/x86/xen/xen-head.S
parentc91265cd0efb83778f015b4d4b1129bd2cfd075e (diff)
Linux-libre 4.6.2-gnu
Diffstat (limited to 'arch/x86/xen/xen-head.S')
-rw-r--r--arch/x86/xen/xen-head.S21
1 files changed, 13 insertions, 8 deletions
diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index b65f59a35..7f8d8abf4 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