[Bug 251083] WITH_INIT_ALL_ZERO results in exception in UEFI during boot

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251083

            Bug ID: 251083
           Summary: WITH_INIT_ALL_ZERO results in exception in UEFI during
                    boot
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: bugs at FreeBSD.org
          Reporter: emaste at freebsd.org

Building world/kernel on amd64 with WITH_INIT_ALL_ZERO set and booting in QEMU
results in this failure to boot:

/boot/entropy size=0x1000
Start @ 0xffffffff80377000 ...
!!!! X64 Exception Type - 06(#UD - Invalid Opcode)  CPU Apic ID - 00000000 !!!!
RIP  - FFFFFFFF819BCAFA, CS  - 0000000000000038, RFLAGS - 0000000000000002
RAX  - FFFFFFFF80376020, RCX - 0000000000000000, RDX - 00000000000018AA
RBX  - 0000000000000000, RSP - FFFFFFFF819BC658, RBP - FFFFFFFF82118000
RSI  - 00000000000058B8, RDI - FFFFFFFF819BC428
R8   - 0000000000000000, R9  - FFFFFFFF80C40A50, R10 - 0000000000005A30
R11  - 0000000000000CF0, R12 - 0000000002122000, R13 - 0211800000000000
R14  - 0000000002122000, R15 - 000F000000000000
DS   - 0000000000000030, ES  - 0000000000000030, FS  - 0000000000000030
GS   - 0000000000000030, SS  - 0000000000000030
CR0  - 0000000080010033, CR2 - 0000000000000000, CR3 - 000000000EA4F000
CR4  - 0000000000000668, CR8 - 0000000000000000
DR0  - 0000000000000000, DR1 - 0000000000000000, DR2 - 0000000000000000
DR3  - 0000000000000000, DR6 - 00000000FFFF0FF0, DR7 - 0000000000000400
GDTR - 000000000FBEEA98 0000000000000047, LDTR - 0000000000000000
IDTR - 000000000F819018 0000000000000FFF,   TR - 0000000000000000
FXSAVE_STATE - FFFFFFFF819BC2B0
!!!! Find image based on IP(0x819BCAFA)
/wrkdirs/usr/ports/sysutils/uefi-edk2-qemu/work-x86_64/edk2-edk2-stable201911/Build/OvmfX64/RELEASE_GCC5/X64/MdeModulePkg/Core/Pei/PeiMain/DEBUG/PeiCore.dll
(ImageBase=FFFFFFFF4FEED000, EntryPoint=FFFFFFFF4FEF29F8) !!!!
qemu-system-x86_64: terminating on signal 15 from pid 12144 (timeout)

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