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[Qemu-devel] QEMU TCG issue when executing UEFI


From: Ard Biesheuvel
Subject: [Qemu-devel] QEMU TCG issue when executing UEFI
Date: Tue, 16 Aug 2016 14:08:51 +0200

Hello all,

I am hitting this strange issue when executing the UEFI firmware for
QEMU mach-virt/AArch64. This only occurs when building the firmware
with GCC5 in RELEASE mode, but the failure mode suggests that this may
not be relevant.

Running a aarch64-softmmu QEMU built from today's master, I get

$ qemu-system-aarch64 -M virt -nographic -cpu cortex-a53 -bios QEMU_EFI.fd

add-symbol-file
/home/ard/build/edk2/Build/ArmVirtQemu-AARCH64/RELEASE_GCC5/AARCH64/ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore/DEBUG/ArmPlatformPrePeiCore.dll
0x1800
add-symbol-file
/home/ard/build/edk2/Build/ArmVirtQemu-AARCH64/RELEASE_GCC5/AARCH64/MdeModulePkg/Core/Pei/PeiMain/DEBUG/PeiCore.dll
0x7980
Register PPI Notify: DCD0BE23-9586-40F4-B643-06522CED4EDE
Install PPI: 8C8CE578-8A3D-4F1C-9935-896185C32DD3
Install PPI: 5473C07A-3DCB-4DCA-BD6F-1E9689E7349A
The 0th FV start address is 0x00000001000, size is 0x001FF000, handle is 0x1000
Register PPI Notify: 49EDB1C1-BF21-4761-BB12-EB0031AABB39
Register PPI Notify: EA7CA24B-DED5-4DAD-A389-BF827E8F9B38
Install PPI: B9E0ABFE-5979-4914-977F-6DEE78C278A6
Install PPI: DBE23AA9-A345-4B97-85B6-B226F1617389
add-symbol-file
/home/ard/build/edk2/Build/ArmVirtQemu-AARCH64/RELEASE_GCC5/AARCH64/MdeModulePkg/Universal/PCD/Pei/Pcd/DEBUG/PcdPeim.dll
0x16B80
Loading PEIM at 0x00000016AA0 EntryPoint=0x0000001789C PcdPeim.efi
Install PPI: 06E81C58-4AD7-44BC-8390-F10265F72480
Install PPI: 01F34D25-4DE2-23AD-3FF3-36353FF323F1
Install PPI: 4D8B155B-C059-4C8F-8926-06FD4331DB8A
Install PPI: A60C6B59-E459-425D-9C69-0BCC9CB27D81
Bad ram pointer 0x54
Aborted (core dumped)

UEFI build is here
http://people.linaro.org/~ard.biesheuvel/QEMU_EFI.fd.xz

Thanks,
Ard.



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