REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3790
Replace Opcode with the corresponding instructions.
The code changes have been verified with CompareBuild.py tool, which
can be used to compare the results of two different EDK II builds to
determine if they generate the same binaries.
(tool link: https://github.com/mdkinney/edk2/tree/sandbox/CompareBuild)
Signed-off-by: Jason Lou <yun.lou@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084
When DXE drivers are dispatched above 4GB memory in 64bit
mode, the address setCodeSelectorLongJump in stack will
be override by parameter. Jump to Qword is not supported
by some processors. So use "o64 retf" instead.
Signed-off-by: Guo Dong <guo.dong@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Tested-by: James Bottomley <jejb@linux.ibm.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
This reverts commit cee5b0441af39dd6f76cc4e0447a1c7f788cbb00.
Commit cee5b0441af3 ("UefiCpuPkg/CpuDxe: Fix boot error", 2020-12-08)
breaks CpuDxe (and with it, OVMF boot) on AMD processors. AMD processors
cannot do far jumps to 64-bit targets, as documented in the AMD64
Architecture Programmer's Manual.
Revert the patch until a RETFQ-based substitute is posted.
Cc: Eric Dong <eric.dong@intel.com>
Cc: Guo Dong <guo.dong@intel.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Thomas Lendacky <thomas.lendacky@amd.com>
Ref: https://edk2.groups.io/g/devel/message/68597
Ref: https://www.redhat.com/archives/edk2-devel-archive/2020-December/msg00493.html
Reported-by: Thomas Lendacky <thomas.lendacky@amd.com>
Ref: https://edk2.groups.io/g/devel/message/68832
Ref: https://www.redhat.com/archives/edk2-devel-archive/2020-December/msg00737.html
Reported-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20201217085055.15131-1-lersek@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3121
[lersek@redhat.com: add BZ link]
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084
When DXE drivers are dispatched above 4GB memory and
the system is already in 64bit mode, the address
setCodeSelectorLongJump in stack will be override
by parameter. so change to use 64bit address and
jump to qword address.
Signed-off-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
