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OvmfPkg: disable no-exec DXE stack by default 

(PcdSetNxForStack == TRUE) breaks a number of GRUB versions that, it turns
out, are still widely in use. Disable PcdSetNxForStack by default for now.
QEMU users can enable it dynamically using the micro-feature added in the
previous patch.

Reported-by: Anthony Perard <anthony.perard@citrix.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Ian Campbell <Ian.Campbell@citrix.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18472 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Laszlo Ersek 2015-09-15 08:35:19 +00:00 committed by lersek
parent ab081a50e5
commit d20b06a3af
3 changed files with 3 additions and 3 deletions
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2
OvmfPkg/OvmfPkgIa32.dsc
View File

@ -373,7 +373,7 @@
gUefiOvmfPkgTokenSpaceGuid.PcdQemuSmbiosValidated|FALSE
# Noexec settings for DXE.
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|TRUE
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|FALSE
gEfiMdeModulePkgTokenSpaceGuid.PcdPropertiesTableEnable|FALSE
################################################################################

2
OvmfPkg/OvmfPkgIa32X64.dsc
View File

@ -379,7 +379,7 @@
gUefiOvmfPkgTokenSpaceGuid.PcdQemuSmbiosValidated|FALSE
# Noexec settings for DXE.
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|TRUE
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|FALSE
gEfiMdeModulePkgTokenSpaceGuid.PcdPropertiesTableEnable|FALSE
################################################################################

2
OvmfPkg/OvmfPkgX64.dsc
View File

@ -378,7 +378,7 @@
gUefiOvmfPkgTokenSpaceGuid.PcdQemuSmbiosValidated|FALSE
# Noexec settings for DXE.
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|TRUE
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|FALSE
gEfiMdeModulePkgTokenSpaceGuid.PcdPropertiesTableEnable|FALSE
################################################################################