mirror of
https://github.com/reactos/reactos.git
synced 2025-06-25 09:29:45 +00:00
Create a branch for cmake bringup.
svn path=/branches/cmake-bringup/; revision=48236
This commit is contained in:
Amine Khaldi
parent
a28e798006
commit
c424146e2c
20602 changed files with 0 additions and 1140137 deletions
684
lib/rtl/amd64/unwind.c
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684
lib/rtl/amd64/unwind.c
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@ -0,0 +1,684 @@
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/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* PURPOSE: Unwinding related functions
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* PROGRAMMER: Timo Kreuzer (timo.kreuzer@reactos.org)
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*/
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/* INCLUDES *****************************************************************/
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#include <rtl.h>
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#define NDEBUG
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#include <debug.h>
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#define UNWIND_HISTORY_TABLE_NONE 0
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#define UNWIND_HISTORY_TABLE_GLOBAL 1
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#define UNWIND_HISTORY_TABLE_LOCAL 2
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#define UWOP_PUSH_NONVOL 0
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#define UWOP_ALLOC_LARGE 1
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#define UWOP_ALLOC_SMALL 2
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#define UWOP_SET_FPREG 3
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#define UWOP_SAVE_NONVOL 4
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#define UWOP_SAVE_NONVOL_FAR 5
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#define UWOP_SAVE_XMM 6
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#define UWOP_SAVE_XMM_FAR 7
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#define UWOP_SAVE_XMM128 8
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#define UWOP_SAVE_XMM128_FAR 9
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#define UWOP_PUSH_MACHFRAME 10
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|
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#define UNW_FLAG_NHANDLER 0
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#define UNW_FLAG_EHANDLER 1
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#define UNW_FLAG_UHANDLER 2
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#define UNW_FLAG_CHAININFO 4
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typedef unsigned char UBYTE;
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typedef union _UNWIND_CODE
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{
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struct
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{
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UBYTE CodeOffset;
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UBYTE UnwindOp:4;
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UBYTE OpInfo:4;
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};
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USHORT FrameOffset;
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} UNWIND_CODE, *PUNWIND_CODE;
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typedef struct _UNWIND_INFO
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{
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UBYTE Version:3;
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UBYTE Flags:5;
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UBYTE SizeOfProlog;
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UBYTE CountOfCodes;
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UBYTE FrameRegister:4;
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UBYTE FrameOffset:4;
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UNWIND_CODE UnwindCode[1];
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/* union {
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OPTIONAL ULONG ExceptionHandler;
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OPTIONAL ULONG FunctionEntry;
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};
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OPTIONAL ULONG ExceptionData[];
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*/
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} UNWIND_INFO, *PUNWIND_INFO;
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/* FUNCTIONS *****************************************************************/
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/*! RtlLookupFunctionTable
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* \brief Locates the table of RUNTIME_FUNCTION entries for a code address.
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* \param ControlPc
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* Address of the code, for which the table should be searched.
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* \param ImageBase
|
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* Pointer to a DWORD64 that receives the base address of the
|
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* corresponding executable image.
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* \param Length
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* Pointer to an ULONG that receives the number of table entries
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* present in the table.
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*/
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PRUNTIME_FUNCTION
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NTAPI
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RtlLookupFunctionTable(
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IN DWORD64 ControlPc,
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OUT PDWORD64 ImageBase,
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OUT PULONG Length)
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{
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PVOID Table;
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ULONG Size;
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/* Find corresponding file header from code address */
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if (!RtlPcToFileHeader((PVOID)ControlPc, (PVOID*)ImageBase))
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{
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/* Nothing found */
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return NULL;
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}
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/* Locate the exception directory */
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Table = RtlImageDirectoryEntryToData((PVOID)*ImageBase,
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TRUE,
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IMAGE_DIRECTORY_ENTRY_EXCEPTION,
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&Size);
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/* Return the number of entries */
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*Length = Size / sizeof(RUNTIME_FUNCTION);
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/* Return the address of the table */
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return Table;
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}
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/*! RtlLookupFunctionEntry
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* \brief Locates the RUNTIME_FUNCTION entry corresponding to a code address.
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* \ref http://msdn.microsoft.com/en-us/library/ms680597(VS.85).aspx
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* \todo Implement HistoryTable
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*/
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PRUNTIME_FUNCTION
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NTAPI
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RtlLookupFunctionEntry(
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IN DWORD64 ControlPc,
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OUT PDWORD64 ImageBase,
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OUT PUNWIND_HISTORY_TABLE HistoryTable)
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{
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PRUNTIME_FUNCTION FunctionTable, FunctionEntry;
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ULONG TableLength;
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ULONG IndexLo, IndexHi, IndexMid;
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/* Find the corresponding table */
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FunctionTable = RtlLookupFunctionTable(ControlPc, ImageBase, &TableLength);
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/* Fail, if no table is found */
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if (!FunctionTable)
|
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{
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return NULL;
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}
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|
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/* Use relative virtual address */
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ControlPc -= *ImageBase;
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/* Do a binary search */
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IndexLo = 0;
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IndexHi = TableLength;
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while (IndexHi > IndexLo)
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{
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IndexMid = (IndexLo + IndexHi) / 2;
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FunctionEntry = &FunctionTable[IndexMid];
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if (ControlPc < FunctionEntry->BeginAddress)
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{
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/* Continue search in lower half */
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IndexHi = IndexMid;
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}
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else if (ControlPc >= FunctionEntry->EndAddress)
|
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{
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/* Continue search in upper half */
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IndexLo = IndexMid + 1;
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}
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else
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||||
{
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||||
/* ControlPc is within limits, return entry */
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return FunctionEntry;
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}
|
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}
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/* Nothing found, return NULL */
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return NULL;
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}
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BOOLEAN
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NTAPI
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RtlAddFunctionTable(
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IN PRUNTIME_FUNCTION FunctionTable,
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IN DWORD EntryCount,
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IN DWORD64 BaseAddress)
|
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{
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UNIMPLEMENTED;
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return FALSE;
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}
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BOOLEAN
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NTAPI
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RtlDeleteFunctionTable(
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IN PRUNTIME_FUNCTION FunctionTable)
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{
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UNIMPLEMENTED;
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return FALSE;
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}
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BOOLEAN
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NTAPI
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RtlInstallFunctionTableCallback(
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IN DWORD64 TableIdentifier,
|
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IN DWORD64 BaseAddress,
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IN DWORD Length,
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IN PGET_RUNTIME_FUNCTION_CALLBACK Callback,
|
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IN PVOID Context,
|
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IN PCWSTR OutOfProcessCallbackDll)
|
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{
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UNIMPLEMENTED;
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return FALSE;
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}
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void
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FORCEINLINE
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SetReg(PCONTEXT Context, BYTE Reg, DWORD64 Value)
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{
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((DWORD64*)(&Context->Rax))[Reg] = Value;
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}
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DWORD64
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FORCEINLINE
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GetReg(PCONTEXT Context, BYTE Reg)
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{
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return ((DWORD64*)(&Context->Rax))[Reg];
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}
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void
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FORCEINLINE
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PopReg(PCONTEXT Context, BYTE Reg)
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{
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DWORD64 Value = *(DWORD64*)Context->Rsp;
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Context->Rsp += 8;
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SetReg(Context, Reg, Value);
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}
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/*! RtlpTryToUnwindEpilog
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* \brief Helper function that tries to unwind epilog instructions.
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* \return TRUE if we have been in an epilog and it could be unwound.
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* FALSE if the instructions were not allowed for an epilog.
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* \ref
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* http://msdn.microsoft.com/en-us/library/8ydc79k6(VS.80).aspx
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* http://msdn.microsoft.com/en-us/library/tawsa7cb.aspx
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* \todo
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* - Test and compare with Windows behaviour
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*/
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BOOLEAN
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static
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__inline
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RtlpTryToUnwindEpilog(
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PCONTEXT Context,
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ULONG64 ImageBase,
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PRUNTIME_FUNCTION FunctionEntry)
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{
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CONTEXT LocalContext;
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BYTE *InstrPtr;
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DWORD Instr;
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BYTE Reg, Mod;
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ULONG64 EndAddress;
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/* Make a local copy of the context */
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LocalContext = *Context;
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InstrPtr = (BYTE*)LocalContext.Rip;
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/* Check if first instruction of epilog is "add rsp, x" */
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Instr = *(DWORD*)InstrPtr;
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if ( (Instr & 0x00fffdff) == 0x00c48148 )
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{
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if ( (Instr & 0x0000ff00) == 0x8300 )
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{
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/* This is "add rsp, 0x??" */
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LocalContext.Rsp += Instr >> 24;
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InstrPtr += 4;
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}
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else
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{
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/* This is "add rsp, 0x???????? */
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LocalContext.Rsp += *(DWORD*)(InstrPtr + 3);
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InstrPtr += 7;
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}
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}
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/* Check if first instruction of epilog is "lea rsp, ..." */
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else if ( (Instr & 0x38fffe) == 0x208d48 )
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{
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/* Get the register */
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Reg = ((Instr << 8) | (Instr >> 16)) & 0x7;
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LocalContext.Rsp = GetReg(&LocalContext, Reg);
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/* Get adressing mode */
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Mod = (Instr >> 22) & 0x3;
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if (Mod == 0)
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{
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/* No displacement */
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InstrPtr += 3;
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}
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else if (Mod == 1)
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{
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/* 1 byte displacement */
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LocalContext.Rsp += Instr >> 24;
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InstrPtr += 4;
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}
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else if (Mod == 2)
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{
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/* 4 bytes displacement */
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LocalContext.Rsp += *(DWORD*)(InstrPtr + 3);
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InstrPtr += 7;
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}
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}
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||||
|
||||
/* Loop the following instructions */
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EndAddress = FunctionEntry->EndAddress + ImageBase;
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while((DWORD64)InstrPtr < EndAddress)
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{
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Instr = *(DWORD*)InstrPtr;
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|
||||
/* Check for a simple pop */
|
||||
if ( (Instr & 0xf8) == 0x58 )
|
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{
|
||||
/* Opcode pops a basic register from stack */
|
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Reg = Instr & 0x7;
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||||
PopReg(&LocalContext, Reg);
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InstrPtr++;
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continue;
|
||||
}
|
||||
|
||||
/* Check for REX + pop */
|
||||
if ( (Instr & 0xf8fb) == 0x5841 )
|
||||
{
|
||||
/* Opcode is pop r8 .. r15 */
|
||||
Reg = (Instr & 0x7) + 8;
|
||||
PopReg(&LocalContext, Reg);
|
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InstrPtr += 2;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Check for retn / retf */
|
||||
if ( (Instr & 0xf7) == 0xc3 )
|
||||
{
|
||||
/* We are finished */
|
||||
break;
|
||||
}
|
||||
|
||||
/* Opcode not allowed for Epilog */
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* Unwind is finished, pop new Rip from Stack */
|
||||
LocalContext.Rip = *(DWORD64*)LocalContext.Rsp;
|
||||
LocalContext.Rsp += sizeof(DWORD64);
|
||||
|
||||
*Context = LocalContext;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
||||
PEXCEPTION_ROUTINE
|
||||
NTAPI
|
||||
RtlVirtualUnwind(
|
||||
IN ULONG HandlerType,
|
||||
IN ULONG64 ImageBase,
|
||||
IN ULONG64 ControlPc,
|
||||
IN PRUNTIME_FUNCTION FunctionEntry,
|
||||
IN OUT PCONTEXT Context,
|
||||
OUT PVOID *HandlerData,
|
||||
OUT PULONG64 EstablisherFrame,
|
||||
IN OUT PKNONVOLATILE_CONTEXT_POINTERS ContextPointers)
|
||||
{
|
||||
PUNWIND_INFO UnwindInfo;
|
||||
ULONG CodeOffset;
|
||||
ULONG i;
|
||||
UNWIND_CODE UnwindCode;
|
||||
BYTE Reg;
|
||||
|
||||
/* Use relative virtual address */
|
||||
ControlPc -= ImageBase;
|
||||
|
||||
/* Sanity checks */
|
||||
if ( (ControlPc < FunctionEntry->BeginAddress) ||
|
||||
(ControlPc >= FunctionEntry->EndAddress) )
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Get a pointer to the unwind info */
|
||||
UnwindInfo = RVA(ImageBase, FunctionEntry->UnwindData);
|
||||
|
||||
/* Calculate relative offset to function start */
|
||||
CodeOffset = ControlPc - FunctionEntry->BeginAddress;
|
||||
|
||||
/* Check if we are in the function epilog and try to finish it */
|
||||
if (CodeOffset > UnwindInfo->SizeOfProlog)
|
||||
{
|
||||
if (RtlpTryToUnwindEpilog(Context, ImageBase, FunctionEntry))
|
||||
{
|
||||
/* There's no exception routine */
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/* Skip all Ops with an offset greater than the current Offset */
|
||||
i = 0;
|
||||
while (i < UnwindInfo->CountOfCodes &&
|
||||
CodeOffset < UnwindInfo->UnwindCode[i].CodeOffset)
|
||||
{
|
||||
UnwindCode = UnwindInfo->UnwindCode[i];
|
||||
switch (UnwindCode.UnwindOp)
|
||||
{
|
||||
case UWOP_SAVE_NONVOL:
|
||||
case UWOP_SAVE_XMM:
|
||||
case UWOP_SAVE_XMM128:
|
||||
i += 2;
|
||||
break;
|
||||
|
||||
case UWOP_SAVE_NONVOL_FAR:
|
||||
case UWOP_SAVE_XMM_FAR:
|
||||
case UWOP_SAVE_XMM128_FAR:
|
||||
i += 3;
|
||||
break;
|
||||
|
||||
case UWOP_ALLOC_LARGE:
|
||||
i += UnwindCode.OpInfo ? 3 : 2;
|
||||
break;
|
||||
|
||||
default:
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
/* Process the left Ops */
|
||||
while (i < UnwindInfo->CountOfCodes)
|
||||
{
|
||||
UnwindCode = UnwindInfo->UnwindCode[i];
|
||||
switch (UnwindCode.UnwindOp)
|
||||
{
|
||||
case UWOP_PUSH_NONVOL:
|
||||
Reg = UnwindCode.OpInfo;
|
||||
SetReg(Context, Reg, *(DWORD64*)Context->Rsp);
|
||||
Context->Rsp += sizeof(DWORD64);
|
||||
i++;
|
||||
break;
|
||||
|
||||
case UWOP_ALLOC_LARGE:
|
||||
if (UnwindCode.OpInfo)
|
||||
{
|
||||
ULONG Offset = *(ULONG*)(&UnwindInfo->UnwindCode[i+1]);
|
||||
Context->Rsp += Offset;
|
||||
i += 3;
|
||||
}
|
||||
else
|
||||
{
|
||||
USHORT Offset = UnwindInfo->UnwindCode[i+1].FrameOffset;
|
||||
Context->Rsp += Offset * 8;
|
||||
i += 2;
|
||||
}
|
||||
break;
|
||||
|
||||
case UWOP_ALLOC_SMALL:
|
||||
Context->Rsp += (UnwindCode.OpInfo + 1) * 8;
|
||||
i++;
|
||||
break;
|
||||
|
||||
case UWOP_SET_FPREG:
|
||||
i++;
|
||||
break;
|
||||
|
||||
case UWOP_SAVE_NONVOL:
|
||||
i += 2;
|
||||
break;
|
||||
|
||||
case UWOP_SAVE_NONVOL_FAR:
|
||||
i += 3;
|
||||
break;
|
||||
|
||||
case UWOP_SAVE_XMM:
|
||||
i += 2;
|
||||
break;
|
||||
|
||||
case UWOP_SAVE_XMM_FAR:
|
||||
i += 3;
|
||||
break;
|
||||
|
||||
case UWOP_SAVE_XMM128:
|
||||
i += 2;
|
||||
break;
|
||||
|
||||
case UWOP_SAVE_XMM128_FAR:
|
||||
i += 3;
|
||||
break;
|
||||
|
||||
case UWOP_PUSH_MACHFRAME:
|
||||
i += 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Unwind is finished, pop new Rip from Stack */
|
||||
Context->Rip = *(DWORD64*)Context->Rsp;
|
||||
Context->Rsp += sizeof(DWORD64);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
VOID
|
||||
NTAPI
|
||||
RtlUnwindEx(
|
||||
IN ULONG64 TargetFrame,
|
||||
IN ULONG64 TargetIp,
|
||||
IN PEXCEPTION_RECORD ExceptionRecord,
|
||||
IN PVOID ReturnValue,
|
||||
OUT PCONTEXT OriginalContext,
|
||||
IN PUNWIND_HISTORY_TABLE HistoryTable)
|
||||
{
|
||||
UNIMPLEMENTED;
|
||||
return;
|
||||
}
|
||||
|
||||
VOID
|
||||
NTAPI
|
||||
RtlUnwind(
|
||||
IN PVOID TargetFrame,
|
||||
IN PVOID TargetIp,
|
||||
IN PEXCEPTION_RECORD ExceptionRecord,
|
||||
IN PVOID ReturnValue)
|
||||
{
|
||||
UNIMPLEMENTED;
|
||||
return;
|
||||
}
|
||||
|
||||
ULONG
|
||||
NTAPI
|
||||
RtlWalkFrameChain(OUT PVOID *Callers,
|
||||
IN ULONG Count,
|
||||
IN ULONG Flags)
|
||||
{
|
||||
CONTEXT Context;
|
||||
ULONG64 ControlPc, ImageBase, EstablisherFrame;
|
||||
ULONG64 StackLow, StackHigh;
|
||||
PVOID HandlerData;
|
||||
INT i;
|
||||
PRUNTIME_FUNCTION FunctionEntry;
|
||||
|
||||
DPRINT("Enter RtlWalkFrameChain\n");
|
||||
|
||||
/* Capture the current Context */
|
||||
RtlCaptureContext(&Context);
|
||||
ControlPc = Context.Rip;
|
||||
|
||||
/* Get the stack limits */
|
||||
RtlpGetStackLimits(&StackLow, &StackHigh);
|
||||
|
||||
/* Check if we want the user-mode stack frame */
|
||||
if (Flags == 1)
|
||||
{
|
||||
}
|
||||
|
||||
/* Loop the frames */
|
||||
for (i = 0; i < Count; i++)
|
||||
{
|
||||
/* Lookup the FunctionEntry for the current ControlPc */
|
||||
FunctionEntry = RtlLookupFunctionEntry(ControlPc, &ImageBase, NULL);
|
||||
|
||||
/* Is this a leaf function? */
|
||||
if (!FunctionEntry)
|
||||
{
|
||||
Context.Rip = *(DWORD64*)Context.Rsp;
|
||||
Context.Rsp += sizeof(DWORD64);
|
||||
DPRINT("leaf funtion, new Rip = %p, new Rsp = %p\n", (PVOID)Context.Rip, (PVOID)Context.Rsp);
|
||||
}
|
||||
else
|
||||
{
|
||||
RtlVirtualUnwind(0,
|
||||
ImageBase,
|
||||
ControlPc,
|
||||
FunctionEntry,
|
||||
&Context,
|
||||
&HandlerData,
|
||||
&EstablisherFrame,
|
||||
NULL);
|
||||
DPRINT("normal funtion, new Rip = %p, new Rsp = %p\n", (PVOID)Context.Rip, (PVOID)Context.Rsp);
|
||||
}
|
||||
|
||||
/* Check if new Rip is valid */
|
||||
if (!Context.Rip)
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
/* Check, if we have left our stack */
|
||||
if ((Context.Rsp < StackLow) || (Context.Rsp > StackHigh))
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
/* Save this frame and continue with new Rip */
|
||||
ControlPc = Context.Rip;
|
||||
Callers[i] = (PVOID)ControlPc;
|
||||
}
|
||||
|
||||
DPRINT("RtlWalkFrameChain returns %ld\n", i);
|
||||
return i;
|
||||
}
|
||||
|
||||
/*! RtlGetCallersAddress
|
||||
* \ref http://undocumented.ntinternals.net/UserMode/Undocumented%20Functions/Debug/RtlGetCallersAddress.html
|
||||
*/
|
||||
#undef RtlGetCallersAddress
|
||||
VOID
|
||||
NTAPI
|
||||
RtlGetCallersAddress(
|
||||
OUT PVOID *CallersAddress,
|
||||
OUT PVOID *CallersCaller )
|
||||
{
|
||||
PVOID Callers[4];
|
||||
ULONG Number;
|
||||
|
||||
/* Get callers:
|
||||
* RtlWalkFrameChain -> RtlGetCallersAddress -> x -> y */
|
||||
Number = RtlWalkFrameChain(Callers, 4, 0);
|
||||
|
||||
if (CallersAddress)
|
||||
{
|
||||
*CallersAddress = (Number >= 3) ? Callers[2] : NULL;
|
||||
}
|
||||
if (CallersCaller)
|
||||
{
|
||||
*CallersCaller = (Number == 4) ? Callers[3] : NULL;
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
// FIXME: move to different file
|
||||
VOID
|
||||
NTAPI
|
||||
RtlRaiseException(IN PEXCEPTION_RECORD ExceptionRecord)
|
||||
{
|
||||
CONTEXT Context;
|
||||
NTSTATUS Status = STATUS_INVALID_DISPOSITION;
|
||||
ULONG64 ImageBase;
|
||||
PRUNTIME_FUNCTION FunctionEntry;
|
||||
PVOID HandlerData;
|
||||
ULONG64 EstablisherFrame;
|
||||
|
||||
/* Capture the context */
|
||||
RtlCaptureContext(&Context);
|
||||
|
||||
/* Get the function entry for this function */
|
||||
FunctionEntry = RtlLookupFunctionEntry(Context.Rip,
|
||||
&ImageBase,
|
||||
NULL);
|
||||
|
||||
/* Check if we found it */
|
||||
if (FunctionEntry)
|
||||
{
|
||||
/* Unwind to the caller of this function */
|
||||
RtlVirtualUnwind(UNW_FLAG_NHANDLER,
|
||||
ImageBase,
|
||||
Context.Rip,
|
||||
FunctionEntry,
|
||||
&Context,
|
||||
&HandlerData,
|
||||
&EstablisherFrame,
|
||||
NULL);
|
||||
|
||||
/* Save the exception address */
|
||||
ExceptionRecord->ExceptionAddress = (PVOID)Context.Rip;
|
||||
|
||||
/* Write the context flag */
|
||||
Context.ContextFlags = CONTEXT_FULL;
|
||||
|
||||
/* Check if user mode debugger is active */
|
||||
if (RtlpCheckForActiveDebugger())
|
||||
{
|
||||
/* Raise an exception immediately */
|
||||
Status = ZwRaiseException(ExceptionRecord, &Context, TRUE);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Dispatch the exception and check if we should continue */
|
||||
if (!RtlDispatchException(ExceptionRecord, &Context))
|
||||
{
|
||||
/* Raise the exception */
|
||||
Status = ZwRaiseException(ExceptionRecord, &Context, FALSE);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Continue, go back to previous context */
|
||||
Status = ZwContinue(&Context, FALSE);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* If we returned, raise a status */
|
||||
RtlRaiseStatus(Status);
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue