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| author | Keir Fraser <keir.fraser@citrix.com> | 2007-11-23 16:22:13 +0000 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2007-11-23 16:22:13 +0000 |
| commit | 8d71c3dfb8f23ff68a03e6640cc4a8c40d25ea99 (patch) | |
| tree | 6297d0de7047c4152d16f56c811f7c9028e5cc4c /extras/mini-os/arch/x86/x86_64.S | |
| parent | 255c12e851df35eded674926ee558484587ebff9 (diff) | |
| download | xen-8d71c3dfb8f23ff68a03e6640cc4a8c40d25ea99.tar.gz xen-8d71c3dfb8f23ff68a03e6640cc4a8c40d25ea99.tar.bz2 xen-8d71c3dfb8f23ff68a03e6640cc4a8c40d25ea99.zip | |
[Mini-OS] Fix x86 initial stack alignment
This fixes the initial stack alignment for x86, which is required for
current to return a fine NULL instead of a random value or possibly
crash during initialization.
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
Diffstat (limited to 'extras/mini-os/arch/x86/x86_64.S')
| -rw-r--r-- | extras/mini-os/arch/x86/x86_64.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/extras/mini-os/arch/x86/x86_64.S b/extras/mini-os/arch/x86/x86_64.S index 2b621784ed..1b5e0f7b37 100644 --- a/extras/mini-os/arch/x86/x86_64.S +++ b/extras/mini-os/arch/x86/x86_64.S @@ -18,11 +18,12 @@ _start: cld movq stack_start(%rip),%rsp + andq $(~(8192-1)), %rsp movq %rsi,%rdi call start_kernel stack_start: - .quad stack+8192 + .quad stack+(2*8192) /* Unpleasant -- the PTE that maps this page is actually overwritten */ /* to map the real shared-info page! :-) */ |