This series enables the non-exec DXE stack feature for AARCH64. It involves
some refactoring of ArmLib so we can reuse the bulk of the page table
manipulation code (patch #1,#2). Then, it is simply a matter of calling the
newly introduced ArmSetMemoryRegionNoExec () [patch #3] on the stack region
right after it has been allocated (patch #4).
Patch #5 enables the feature for ArmVirtQemu if building for AARCH64.
Changes since v2:
- v2's 1/4 was actually quite but not entirely unrelated to this series, and was
included in error instead of the 1/4 that I intended to send.
- added a patch that cleans up the definitions of UXN vs XN
- added some acks from Leif
Changes since v1:
- fixed some problems spotted by Heyi regarding the use of correct page table
attributes at EL2 or EL3
- fixed a code bug where the function was exited prematurely
- dropped a RETURN_STATUS to EFI_STATUS cast
- added Laszlo's R-b to patch #4
Ard Biesheuvel (5):
ArmPkg/AArch64Mmu: use architecturally correct definitions for XN/UXN
ArmPkg/AArch64Mmu: move page table traversal code to separate function
ArmPkg/ArmLib MMU: add functions to set/clear RO and XN bits on
regions
MdeModulePkg/DxeIplPeim: implement non-exec stack for ARM/AARCH64
ArmVirtPkg/ArmVirtQemu: enable non-exec DXE stack for AARCH64
ArmPkg/Include/Chipset/AArch64Mmu.h | 6 +-
ArmPkg/Include/Library/ArmLib.h | 24 ++++
ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c | 143 +++++++++++++++++---
ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c | 36 +++++
ArmVirtPkg/ArmVirtQemu.dsc | 3 +
MdeModulePkg/Core/DxeIplPeim/Arm/DxeLoadFunc.c | 7 +
MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf | 8 ++
7 files changed, 205 insertions(+), 22 deletions(-)
--
1.9.1
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