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| author | Laszlo Ersek <lersek@redhat.com> | 2018-02-02 04:46:26 +0100 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2018-04-04 16:44:23 +0200 |
| commit | 5830d2c399f82f09853fac81956495f06c3a4064 (patch) | |
| tree | 8737a186edf6069004cfcd52566755a06a12e00d /UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c | |
| parent | 456c4ccab27b79f1b9c8d13ddcb5ed5453c09c53 (diff) | |
| download | edk2-5830d2c399f82f09853fac81956495f06c3a4064.tar.gz edk2-5830d2c399f82f09853fac81956495f06c3a4064.tar.bz2 edk2-5830d2c399f82f09853fac81956495f06c3a4064.zip | |
UefiCpuPkg/PiSmmCpuDxeSmm: patch "gSmmInitStack" with PatchInstructionX86()
Rename the variable to "gPatchSmmInitStack" so that its association with
PatchInstructionX86() is clear from the declaration, change its type to
X86_ASSEMBLY_PATCH_LABEL, and patch it with PatchInstructionX86(). This
lets us remove the binary (DB) encoding of some instructions in
"SmmInit.nasm".
The size of the patched source operand is (sizeof (UINTN)).
Cc: Eric Dong <eric.dong@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=866
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Diffstat (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c')
| -rwxr-xr-x | UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c index 0c8a4543d8..fbf74e8d90 100755 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c @@ -848,7 +848,11 @@ PiCpuSmmEntry ( //
// Set SMI stack for SMM base relocation
//
- gSmmInitStack = (UINTN) (Stacks + mSmmStackSize - sizeof (UINTN));
+ PatchInstructionX86 (
+ gPatchSmmInitStack,
+ (UINTN) (Stacks + mSmmStackSize - sizeof (UINTN)),
+ sizeof (UINTN)
+ );
//
// Initialize IDT
|