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[NTOSKRNL]

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KDB: print more useful backtrace after double fault or NMI.

svn path=/trunk/; revision=54503
This commit is contained in:
Dmitry Gorbachev 2011-11-26 22:23:00 +00:00
parent 4b474cce59
commit 6c5c7809dd
1 changed files with 94 additions and 0 deletions
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94
reactos/ntoskrnl/kdbg/kdb_cli.c
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@ -948,6 +948,86 @@ KdbpCmdRegs(
return TRUE;
}
static BOOLEAN
KdbpTrapFrameFromPrevTss(
PKTRAP_FRAME TrapFrame)
{
ULONG_PTR Eip, Ebp;
KDESCRIPTOR Gdtr;
KGDTENTRY Desc;
USHORT Sel;
PKTSS Tss;
Ke386GetGlobalDescriptorTable(&Gdtr.Limit);
Sel = Ke386GetTr();
if ((Sel & (sizeof(KGDTENTRY) - 1)) ||
(Sel < sizeof(KGDTENTRY)) ||
(Sel + sizeof(KGDTENTRY) - 1 > Gdtr.Limit))
return FALSE;
if (!NT_SUCCESS(KdbpSafeReadMemory(&Desc,
(PVOID)(Gdtr.Base + Sel),
sizeof(KGDTENTRY))))
return FALSE;
if (Desc.HighWord.Bits.Type != 0xB)
return FALSE;
Tss = (PKTSS)(ULONG_PTR)(Desc.BaseLow |
Desc.HighWord.Bytes.BaseMid << 16 |
Desc.HighWord.Bytes.BaseHi << 24);
if (!NT_SUCCESS(KdbpSafeReadMemory(&Sel,
(PVOID)&Tss->Backlink,
sizeof(USHORT))))
return FALSE;
if ((Sel & (sizeof(KGDTENTRY) - 1)) ||
(Sel < sizeof(KGDTENTRY)) ||
(Sel + sizeof(KGDTENTRY) - 1 > Gdtr.Limit))
return FALSE;
if (!NT_SUCCESS(KdbpSafeReadMemory(&Desc,
(PVOID)(Gdtr.Base + Sel),
sizeof(KGDTENTRY))))
return FALSE;
if (Desc.HighWord.Bits.Type != 0xB)
return FALSE;
Tss = (PKTSS)(ULONG_PTR)(Desc.BaseLow |
Desc.HighWord.Bytes.BaseMid << 16 |
Desc.HighWord.Bytes.BaseHi << 24);
if (!NT_SUCCESS(KdbpSafeReadMemory(&Eip,
(PVOID)&Tss->Eip,
sizeof(ULONG_PTR))))
return FALSE;
if (!NT_SUCCESS(KdbpSafeReadMemory(&Ebp,
(PVOID)&Tss->Ebp,
sizeof(ULONG_PTR))))
return FALSE;
TrapFrame->Eip = Eip;
TrapFrame->Ebp = Ebp;
return TRUE;
}
VOID __cdecl KiTrap02(VOID);
VOID FASTCALL KiTrap03Handler(IN PKTRAP_FRAME);
VOID __cdecl KiTrap08(VOID);
VOID __cdecl KiTrap09(VOID);
static BOOLEAN
KdbpInNmiOrDoubleFaultHandler(
ULONG_PTR Address)
{
return (Address > (ULONG_PTR)KiTrap02 && Address < (ULONG_PTR)KiTrap03Handler) ||
(Address > (ULONG_PTR)KiTrap08 && Address < (ULONG_PTR)KiTrap09);
}
/*!\brief Displays a backtrace.
*/
static BOOLEAN
@ -1055,6 +1135,20 @@ KdbpCmdBackTrace(
if (Address == 0)
break;
if (KdbpInNmiOrDoubleFaultHandler(Address))
{
if ((GotNextFrame = KdbpTrapFrameFromPrevTss(&TrapFrame)))
{
Address = TrapFrame.Eip;
Frame = TrapFrame.Ebp;
if (!KdbSymPrintAddress((PVOID)Address, &TrapFrame))
KdbpPrint("<%08x>\n", Address);
else
KdbpPrint("\n");
}
}
if (!GotNextFrame)
{
KdbpPrint("Couldn't access memory at 0x%p!\n", Frame);