Re: [RFC v2 0/3] Stack trace support in X64 exception handling

["Paulo Alcantara" <pcacjr@zytor.com>]

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Hi Andrew,

On Thu, November 16, 2017 3:01 am, Andrew Fish wrote:
> Paulo,
>
> Those attached stack traces don't look right.

What about the new ones?

Thanks!
Paulo

>
> Thanks,
>
> Andrew Fish
>
>> On Nov 15, 2017, at 5:46 PM, Paulo Alcantara <pcacjr@zytor.com> wrote:
>>
>> Hi,
>>
>> On 11/15/2017 11:18 PM, Paulo Alcantara wrote:
>>> Hi,
>>> This series adds stack trace support during a X64 CPU exception.
>>> Informations like back trace, stack contents and image module names
>>> (that were part of the call stack) will be dumped out.
>>> We already have such support in ARM/AArch64 (IIRC) exception handling
>>> (thanks to Ard), and then I thought we'd also deserve it in X64 and
>>> IA-32 platforms.
>>> What do you think guys?
>>> BTW, I've tested this only with OVMF (X64 only), using:
>>>   - gcc-6.3.0, GCC5, NOOPT
>>> Any other tests  would be really appreciable.
>>> Thanks!
>>> Paulo
>>> Repo:   https://github.com/pcacjr/edk2.git
>>> Branch: stacktrace_v2
>>> Cc: Rick Bramley <richard.bramley@hp.com>
>>> Cc: Andrew Fish <afish@apple.com>
>>> Cc: Eric Dong <eric.dong@intel.com>
>>> Cc: Laszlo Ersek <lersek@redhat.com>
>>> Cc: "Brian J. Johnson" <brian.johnson@hpe.com>
>>> Cc: Jeff Fan <jeff.fan@intel.com>
>>> Contributed-under: TianoCore Contribution Agreement 1.1
>>> Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
>>> ---
>>> v1 -> v2:
>>>   * Add IA32 arch support (GCC toolchain only)
>>>   * Replace hard-coded stack alignment value (16) with
>>>     CPU_STACK_ALIGNMENT.
>>>   * Check for proper stack and frame pointer alignments.
>>>   * Fix initialization of UnwoundStacksCount to 1.
>>>   * Move GetPdbFileName() to common code since it will be used by both
>>>     IA32 and X64 implementations.
>>
>> Sorry for the delay in sending v2. It's holiday here :-)
>>
>> FWIW, I've attached two files which contain stack trace dumps of IA32
>> and X64 exceptions.
>>
>> The new IA32 arch support is still limited to GCC only (that is, relying
>> on frame pointers), but I'll start investing in a new solution that
>> would work on both MSVC and GCC toolchains -- probably this weekend. If
>> I come up with something, I'll let you know.
>>
>> On IA32, I performed the same test as in X64 to trigger an NMI interrupt
>> manually with: asm ("int $0x2") in PartitionDxe driver and watched out
>> the call stack. The difference between the two dumps, regardless the CPU
>> context, etc. is that we don't see the calls from PeiCore.dll. Then I
>> figured out that the EIP gets a value of 0 before jumping to
>> PartitionDxe's entry point.
>>
>> I guess that's related to the "push $0" that Andrew mentioned earlier so
>> the debugger knows when to stop unwinding. Although I can't see a "push
>> 0" equivalent neither in SwitchStack.nasm nor in SwitchStack.asm for X64
>> -- so we're able to see the calls within PeiCore.dll.
>>
>> Thanks!
>> Paulo
>> <x64_dump.txt><ia32_dump.txt>_______________________________________________
>> edk2-devel mailing list
>> edk2-devel@lists.01.org <mailto:edk2-devel@lists.01.org>
>> https://lists.01.org/mailman/listinfo/edk2-devel
>> <https://lists.01.org/mailman/listinfo/edk2-devel>
>


-- 
Paulo Alcantara, HP Inc.
Speaking for myself only.

[-- Attachment #2: ia32_dump.txt --]
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!!!! IA32 Exception Type - 03(#BP - Breakpoint)  CPU Apic ID - 00000000 !!!!
EIP  - 7DBCD580, CS  - 00000010, EFLAGS - 00000206
EAX  - 00000000, ECX - 7EEC8CFF, EDX - 7ED9C220, EBX - 00000000
ESP  - 7EEC8DDC, EBP - 7EEC8DDC, ESI - 00000004, EDI - 00000000
DS   - 00000008, ES  - 00000008, FS  - 00000008, GS  - 00000008, SS - 00000008
CR0  - 00000033, CR2 - 00000000, CR3 - 00000000, CR4 - 00000640
DR0  - 00000000, DR1 - 00000000, DR2 - 00000000, DR3 - 00000000
DR6  - FFFF0FF0, DR7 - 00000400
GDTR - 7EE97A90 00000047, IDTR - 7E65B010 000007FF
LDTR - 00000000, TR - 00000000
FXSAVE_STATE - 7EEC8B20

Call trace:
0 0x7DBCD580 @ 0x7DBCD000+0x57F (0x7EEC8DDC) in PartitionDxe.dll
1 0x7DBD41BE @ 0x7DBCD000+0x71BD (0x7EEC8DFC) in PartitionDxe.dll
2 0x7DBD456C @ 0x7DBCD000+0x756B (0x7EEC8E1C) in PartitionDxe.dll
3 0x7DBCF7F4 @ 0x7DBCD000+0x27F3 (0x7EEC8E4C) in PartitionDxe.dll
4 0x7EED9EA4 @ 0x7EEC9000+0x10EA3 (0x7EEC8E9C) in DxeCore.dll
5 0x7EEF1A8C @ 0x7EEC9000+0x28A8B (0x7EEC8EDC) in DxeCore.dll
6 0x7EEF3DD0 @ 0x7EEC9000+0x2ADCF (0x7EEC8FAC) in DxeCore.dll
7 0x7EEF44A5 @ 0x7EEC9000+0x2B4A4 (0x7EEC8FCC) in DxeCore.dll
8 0x7EECD272 @ 0x7EEC9000+0x4271 (0x7EEC8FEC) in DxeCore.dll

PartitionDxe.dll (ImageBase=0x7DBCD000, EntryPoint=0x7DBCF71B):
/home/pcacjr/src/edk2/Build/OvmfIa32/NOOPT_GCC5/IA32/MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe/DEBUG/PartitionDxe.dll
DxeCore.dll (ImageBase=0x7EEC9000, EntryPoint=0x7EECD259):
/home/pcacjr/src/edk2/Build/OvmfIa32/NOOPT_GCC5/IA32/MdeModulePkg/Core/Dxe/DxeMain/DEBUG/DxeCore.dll

Stack dump:
0x7EEC8DDC: 7EEC8DFC 7DBD41BE
0x7EEC8DE0: 7DBD41BE 7EAA1690
0x7EEC8DE4: 7EAA1690 7EEFC520
0x7EEC8DE8: 7EEFC520 7EEC8E1C
0x7EEC8DEC: 7EEC8E1C 7DBD44EA
0x7EEC8DF0: 7DBD44EA 7E10E010
0x7EEC8DF4: 7E10E010 7EE97010
0x7EEC8DF8: 7EE97010 7EEC8E1C
0x7EEC8DFC: 7EEC8E1C 7DBD456C

[-- Attachment #3: x64_dump.txt --]
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!!!! X64 Exception Type - 03(#BP - Breakpoint)  CPU Apic ID - 00000000 !!!!
RIP  - 000000007EC28791, CS  - 0000000000000038, RFLAGS - 0000000000000202
RAX  - 000000007FE71018, RCX - 000000007F34F498, RDX - 000000007FE71018
RBX  - 0000000000810248, RSP - 000000007FEE4C60, RBP - 000000007FEE4C60
RSI  - 0000000000000007, RDI - 000000007F34E018
R8   - 000000007EC32DC8, R9  - 000000007F34E298, R10 - 0000000000000036
R11  - 00000000000000D7, R12 - 0000000000000000, R13 - 0000000000000000
R14  - 0000000000000000, R15 - 0000000000000000
DS   - 0000000000000030, ES  - 0000000000000030, FS  - 0000000000000030
GS   - 0000000000000030, SS  - 0000000000000030
CR0  - 0000000080010033, CR2 - 0000000000000000, CR3 - 000000007FE83000
CR4  - 0000000000000668, CR8 - 0000000000000000
DR0  - 0000000000000000, DR1 - 0000000000000000, DR2 - 0000000000000000
DR3  - 0000000000000000, DR6 - 00000000FFFF0FF0, DR7 - 0000000000000400
GDTR - 000000007FE71A98 0000000000000047, LDTR - 0000000000000000
IDTR - 000000007F7AB018 0000000000000FFF,   TR - 0000000000000000
FXSAVE_STATE - 000000007FEE48C0

Call trace:
0 0x000000007EC28791 @ 0x000000007EC28000+0x790 (0x000000007FEE4C60) in PartitionDxe.dll
1 0x000000007EC30269 @ 0x000000007EC28000+0x8268 (0x000000007FEE4CB0) in PartitionDxe.dll
2 0x000000007EC30640 @ 0x000000007EC28000+0x863F (0x000000007FEE4CE0) in PartitionDxe.dll
3 0x000000007EC2B116 @ 0x000000007EC28000+0x3115 (0x000000007FEE4D20) in PartitionDxe.dll
4 0x000000007FEF8A1B @ 0x000000007FEE5000+0x13A1A (0x000000007FEE4DB0) in DxeCore.dll
5 0x000000007FF10F10 @ 0x000000007FEE5000+0x2BF0F (0x000000007FEE4E30) in DxeCore.dll
6 0x000000007FF1344B @ 0x000000007FEE5000+0x2E44A (0x000000007FEE4F60) in DxeCore.dll
7 0x000000007FF13BCF @ 0x000000007FEE5000+0x2EBCE (0x000000007FEE4F90) in DxeCore.dll
8 0x000000007FEE9DDE @ 0x000000007FEE5000+0x4DDD (0x000000007FEE4FC0) in DxeCore.dll
9 0x000000007FF5B75F @ 0x000000007FF5B000+0x75E (0x000000007BFDC840) in DxeIpl.dll
10 0x000000007FF61551 @ 0x000000007FF5B000+0x6550 (0x000000007BFDC8C0) in DxeIpl.dll
11 0x000000007FF6031D @ 0x000000007FF5B000+0x531C (0x000000007BFDCA30) in DxeIpl.dll
12 0x000000007FF6CDCB @ 0x000000007FF64000+0x8DCA (0x000000007BFDCF80) in PeiCore.dll
13 0x00000000008286F4 @ 0x0000000000820140+0x85B3 (0x000000007BFDD4D0) in PeiCore.dll
14 0x0000000000830940 @ 0x0000000000820140+0x107FF (0x0000000000817600) in PeiCore.dll
15 0x0000000000831585 @ 0x0000000000820140+0x11444 (0x00000000008176D0) in PeiCore.dll
16 0x0000000000828DAD @ 0x0000000000820140+0x8C6C (0x0000000000817C20) in PeiCore.dll
17 0x0000000000832392 @ 0x0000000000820140+0x12251 (0x0000000000817C50) in PeiCore.dll
18 0x0000000000824313 @ 0x0000000000820140+0x41D2 (0x0000000000817C80) in PeiCore.dll
19 0x00000000FFFD42F1 @ 0x00000000FFFCC094+0x825C (0x0000000000817CE0) in SecMain.dll
20 0x00000000FFFCF578 @ 0x00000000FFFCC094+0x34E3 (0x0000000000817D10) in SecMain.dll
21 0x00000000FFFD428C @ 0x00000000FFFCC094+0x81F7 (0x0000000000817FD0) in SecMain.dll
22 0x00000000FFFD44E9 @ 0x00000000FFFCC094+0x8454 (0x00000000FFFCC000) in SecMain.dll

PartitionDxe.dll (ImageBase=0x000000007EC28000, EntryPoint=0x000000007EC2B01F):
/home/pcacjr/src/edk2/Build/OvmfX64/NOOPT_GCC5/X64/MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe/DEBUG/PartitionDxe.dll
DxeCore.dll (ImageBase=0x000000007FEE5000, EntryPoint=0x000000007FEE9DBE):
/home/pcacjr/src/edk2/Build/OvmfX64/NOOPT_GCC5/X64/MdeModulePkg/Core/Dxe/DxeMain/DEBUG/DxeCore.dll
DxeIpl.dll (ImageBase=0x000000007FF5B000, EntryPoint=0x000000007FF5F87F):
/home/pcacjr/src/edk2/Build/OvmfX64/NOOPT_GCC5/X64/MdeModulePkg/Core/DxeIplPeim/DxeIpl/DEBUG/DxeIpl.dll
PeiCore.dll (ImageBase=0x000000007FF64000, EntryPoint=0x000000007FF681AD):
/home/pcacjr/src/edk2/Build/OvmfX64/NOOPT_GCC5/X64/MdeModulePkg/Core/Pei/PeiMain/DEBUG/PeiCore.dll
PeiCore.dll (ImageBase=0x0000000000820140, EntryPoint=0x00000000008242ED):
/home/pcacjr/src/edk2/Build/OvmfX64/NOOPT_GCC5/X64/MdeModulePkg/Core/Pei/PeiMain/DEBUG/PeiCore.dll
SecMain.dll (ImageBase=0x00000000FFFCC094, EntryPoint=0x00000000FFFD44D4):
/home/pcacjr/src/edk2/Build/OvmfX64/NOOPT_GCC5/X64/OvmfPkg/Sec/SecMain/DEBUG/SecMain.dll

Stack dump:
0x000000007FEE4C60: 000000007FEE4CB0 000000007EC30269
0x000000007FEE4C70: 000000007EC32B20 0000000000000000
0x000000007FEE4C80: 000000007EC32DC8 0000000000000100
0x000000007FEE4C90: 000000007FEE4CB0 0000000000000000
0x000000007FEE4CA0: 000000007FEE4CE0 000000007EC305BA
0x000000007FEE4CB0: 000000007FEE4CE0 000000007EC30640
0x000000007FEE4CC0: 000000007F34F498 000000007FE71018
0x000000007FEE4CD0: 000000077FEF88FB 0000000000000000
0x000000007FEE4CE0: 000000007FEE4D20 000000007EC2B116
0x000000007FEE4CF0: 000000007F34F498 000000007FE71018
0x000000007FEE4D00: 0000000000000000 0000000000000000
0x000000007FEE4D10: 0000000000000000 0000000000000000
0x000000007FEE4D20: 000000007FEE4DB0 000000007FEF8A1B
0x000000007FEE4D30: 000000007F34F498 000000007FE71018
0x000000007FEE4D40: 0000000000000000 0000000000000004
0x000000007FEE4D50: 000000007FF1C1A8 000000007FF1CF90
0x000000007FEE4D60: 000000007FEE4DB0 0000000000000000
0x000000007FEE4D70: 000000007FF1C180 00000000000000B0
0x000000007FEE4D80: 0000000000000000 000000007F34E018
0x000000007FEE4D90: 000000007F34F498 0000000000000000
0x000000007FEE4DA0: 000000007FF1C1A8 000000007FF1CF90
0x000000007FEE4DB0: 000000007FEE4E30 000000007FF10F10
0x000000007FEE4DC0: 000000007F34F498 0000000000000000