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On 03/31/2014 06:27 PM, Peter Maydell wrote: > On 31 March 2014 23:07, Michael Casadevall > <michael.casadev...@linaro.org> wrote: >> On 03/28/2014 07:40 PM, Peter Maydell wrote: >>> There's a bug in QEMU's AArch64 KVM support which means we >>> don't do the right thing with SP on syncing state to/from the >>> kernel, so don't trust that.... (Fixed either in master or in >>> my a64-system patchset, I forget which). > >> My initial attempts at getting ASSERT to give me useful >> information failed; is this patchset for KVM or the kernel, and >> where can I find it? > > It's for QEMU. > https://lists.nongnu.org/archive/html/qemu-devel/2014-03/msg05588.html > > Patch 16 is the one I'm talking about, though it probably depends > on some of the preceding ones (mostly textual conflicts if you try > to apply it on its own I suspect). You can also find that in > git://git.linaro.org/people/peter.maydell/qemu-arm.git branch > a64-system but beware: that is my work-in-progress branch and it > may rebase, break arbitrarily, etc etc. > > thanks -- PMM > I took your branch, added the UEFI patch to it, and then with some fiddling: (gdb) reload-uefi -o GdbSyms.dll EFI_SYSTEM_TABLE @ 0xff7cff18 Connected to KVM EFI Mar 31 2014 17:46:10 (Rev. 0x0) ConfigurationTable @ 0xff7b7e18, 0x6 entries DebugImageInfoTable @ 0xc007e018, 0x1b entries Loading new symbols... add-symbol-file /home/mcasadevall/uefi/Build/AArch64Virtualization-KVM/DEBUG_ARMLINUXGCC/AARCH64/MdeModulePkg/Core/Dxe/DxeMain/DEBUG/DxeCore.dll 0xff7f1260 add symbol table from file "/home/mcasadevall/uefi/Build/AArch64Virtualization-KVM/DEBUG_ARMLINUXGCC/AARCH64/MdeModulePkg/Core/Dxe/DxeMain/DEBUG/DxeCore.dll" at (sip a LOT of output) Program received signal SIGINT, Interrupt. (gdb) bt 0x00000000ff80bba8 in SetMemN (Buffer=0x0, Length=0, Value=0) at /home/mcasadevall/uefi/ArmPkg/Library/BaseMemoryLibStm/SetMemWrapper.c:87 87 return SetMem64 (Buffer, Length, (UINT64)Value); (gdb) bt #0 0x00000000ff80bba8 in SetMemN (Buffer=0x0, Length=0, Value=0) at /home/mcasadevall/uefi/ArmPkg/Library/BaseMemoryLibStm/SetMemWrapper.c:87 #1 0x0000000000000000 in ?? () (gdb) Its a fairly major improvement, and I managed to use GdbSyms.dll to load ALL the symbol files in a single go, but I'm still having issues with the stack. At least now i can get the frame we're currently in reliably, but the backtrace remains busted. reload-uefi also is incredibly slow, probably because its going through three SSH proxies to dump out the DebugImageInfoTable. I can combine this though with printing points out and get a reasonable idea of where stuff is breaking. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTOgnlAAoJEGKVRgSEnX1QvpgIAMo5p5CN5SUCzw9PVqg3hiBE MHINVC9jlh5dZ0vMcLdfXM05oEHdaDO+DR5ZpsAUHw/GDRiBLiktoA7Wp5c3/HYZ l291B/jsmwSC2xZL9On7fQ9PRfwdeuguOOEqwzBgjFdXIIloWYy/M8jwmh4SNTXg FZLGQrKUT+E5nH70bf1AQH+8YMAndCfLlPoI9BENDURSrLLxn44OEFWpn2j41AD6 daU4CWAPXckDlMPwAi6n2uo+Ib7dSdkpv+STV1e2HDsfSqNhBRwhGWTLYATczidD 8uG/WtaNCMwNC7eepSkUS9L/7yJoL8s35U03mtfTgTuSesNeVUBTDdrTQ7pr/mc= =W4Zk -----END PGP SIGNATURE----- _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
