#define NDEBUG\r
#include <internal/debug.h>\r
\r
+#define TAG_ATOM TAG('A', 't', 'o', 'm')\r
+\r
/* GLOBALS ****************************************************************/\r
\r
/* \r
return GlobalAtomTable;\r
}\r
\r
-NTSTATUS\r
-NTAPI\r
-RtlpQueryAtomInformation(PRTL_ATOM_TABLE AtomTable,\r
- RTL_ATOM Atom,\r
- PATOM_BASIC_INFORMATION AtomInformation,\r
- ULONG AtomInformationLength,\r
- PULONG ReturnLength)\r
-{\r
- NTSTATUS Status;\r
- ULONG UsageCount;\r
- ULONG Flags;\r
- ULONG NameLength;\r
-\r
- NameLength = AtomInformationLength - sizeof(ATOM_BASIC_INFORMATION) + sizeof(WCHAR);\r
- Status = RtlQueryAtomInAtomTable(AtomTable,\r
- Atom,\r
- &UsageCount,\r
- &Flags,\r
- AtomInformation->Name,\r
- &NameLength);\r
-\r
- if (!NT_SUCCESS(Status)) return Status;\r
- DPRINT("NameLength: %lu\n", NameLength);\r
-\r
- if (ReturnLength != NULL)\r
- {\r
- *ReturnLength = NameLength + sizeof(ATOM_BASIC_INFORMATION);\r
- }\r
-\r
- if (NameLength + sizeof(ATOM_BASIC_INFORMATION) > AtomInformationLength)\r
- {\r
- return STATUS_INFO_LENGTH_MISMATCH;\r
- }\r
-\r
- AtomInformation->UsageCount = (USHORT)UsageCount;\r
- AtomInformation->Flags = (USHORT)Flags;\r
- AtomInformation->NameLength = (USHORT)NameLength;\r
-\r
- return STATUS_SUCCESS;\r
-}\r
-\r
-NTSTATUS\r
-NTAPI\r
-RtlpQueryAtomTableInformation(PRTL_ATOM_TABLE AtomTable,\r
- RTL_ATOM Atom,\r
- PATOM_TABLE_INFORMATION AtomInformation,\r
- ULONG AtomInformationLength,\r
- PULONG ReturnLength)\r
-{\r
- ULONG Length;\r
- NTSTATUS Status;\r
-\r
- Length = sizeof(ATOM_TABLE_INFORMATION);\r
- DPRINT("RequiredLength: %lu\n", Length);\r
-\r
- if (ReturnLength) *ReturnLength = Length;\r
-\r
- if (Length > AtomInformationLength) return STATUS_INFO_LENGTH_MISMATCH;\r
-\r
- Status = RtlQueryAtomListInAtomTable(AtomTable,\r
- (AtomInformationLength - Length) /\r
- sizeof(RTL_ATOM),\r
- &AtomInformation->NumberOfAtoms,\r
- AtomInformation->Atoms);\r
- if (NT_SUCCESS(Status))\r
- {\r
- ReturnLength += AtomInformation->NumberOfAtoms * sizeof(RTL_ATOM);\r
- if (ReturnLength != NULL) *ReturnLength = Length;\r
- }\r
-\r
- return Status;\r
-}\r
-\r
/* FUNCTIONS ****************************************************************/\r
\r
/*\r
OUT PRTL_ATOM Atom)\r
{\r
PRTL_ATOM_TABLE AtomTable = ExpGetGlobalAtomTable();\r
+ NTSTATUS Status = STATUS_SUCCESS;\r
+ KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();\r
+ LPWSTR CapturedName = NULL;\r
+ ULONG CapturedSize;\r
+ RTL_ATOM SafeAtom;\r
+ PAGED_CODE();\r
\r
/* Check for the table */\r
if (AtomTable == NULL) return STATUS_ACCESS_DENIED;\r
\r
- /* FIXME: SEH! */\r
+ /* Check for valid name */\r
+ if (AtomNameLength > (RTL_MAXIMUM_ATOM_LENGTH * sizeof(WCHAR)))\r
+ {\r
+ /* Fail */\r
+ DPRINT1("Atom name too long\n");\r
+ return STATUS_INVALID_PARAMETER;\r
+ }\r
\r
- /* Call the worker function */\r
- return RtlAddAtomToAtomTable(AtomTable, AtomName, Atom);\r
+ /* Check if we're called from user-mode*/\r
+ if (PreviousMode != KernelMode)\r
+ {\r
+ /* Enter SEH */\r
+ _SEH_TRY\r
+ {\r
+ /* Check if we have a name */\r
+ if (AtomName)\r
+ {\r
+ /* Probe the atom */\r
+ ProbeForRead(AtomName, AtomNameLength, sizeof(WCHAR));\r
+\r
+ /* Allocate an aligned buffer + the null char */\r
+ CapturedSize = ((AtomNameLength + sizeof(WCHAR)) &~\r
+ (sizeof(WCHAR) -1));\r
+ CapturedName = ExAllocatePoolWithTag(PagedPool,\r
+ CapturedSize,\r
+ TAG_ATOM);\r
+ if (!CapturedName)\r
+ {\r
+ /* Fail the call */\r
+ Status = STATUS_INSUFFICIENT_RESOURCES;\r
+ }\r
+ else\r
+ {\r
+ /* Copy the name and null-terminate it */\r
+ RtlMoveMemory(CapturedName, AtomName, AtomNameLength);\r
+ CapturedName[AtomNameLength / sizeof(WCHAR)] = UNICODE_NULL;\r
+ }\r
+\r
+ /* Probe the atom too */\r
+ if (Atom) ProbeForWriteUshort(Atom);\r
+ }\r
+ }\r
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)\r
+ {\r
+ Status = _SEH_GetExceptionCode();\r
+ }\r
+ _SEH_END;\r
+ }\r
+ else\r
+ {\r
+ /* Simplify code and re-use one variable */\r
+ if (AtomName) CapturedName = AtomName;\r
+ }\r
+\r
+ /* Make sure probe worked */\r
+ if (NT_SUCCESS(Status))\r
+ {\r
+ /* Call the runtime function */\r
+ Status = RtlAddAtomToAtomTable(AtomTable, CapturedName, &SafeAtom);\r
+ if (NT_SUCCESS(Status) && (Atom))\r
+ {\r
+ /* Success and caller wants the atom back.. .enter SEH */\r
+ _SEH_TRY\r
+ {\r
+ /* Return the atom */\r
+ *Atom = SafeAtom;\r
+ }\r
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)\r
+ {\r
+ Status = _SEH_GetExceptionCode();\r
+ }\r
+ _SEH_END;\r
+ }\r
+ }\r
+\r
+ /* If we captured anything, free it */\r
+ if ((CapturedName) && (CapturedName != AtomName)) ExFreePool(CapturedName);\r
+\r
+ /* Return to caller */\r
+ return Status;\r
}\r
\r
/*\r
NtDeleteAtom(IN RTL_ATOM Atom)\r
{\r
PRTL_ATOM_TABLE AtomTable = ExpGetGlobalAtomTable();\r
+ PAGED_CODE();\r
\r
/* Check for valid table */\r
if (AtomTable == NULL) return STATUS_ACCESS_DENIED;\r
OUT PRTL_ATOM Atom)\r
{\r
PRTL_ATOM_TABLE AtomTable = ExpGetGlobalAtomTable();\r
+ NTSTATUS Status = STATUS_SUCCESS;\r
+ KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();\r
+ LPWSTR CapturedName = NULL;\r
+ ULONG CapturedSize;\r
+ RTL_ATOM SafeAtom;\r
+ PAGED_CODE();\r
\r
- /* Check for valid table */\r
+ /* Check for the table */\r
if (AtomTable == NULL) return STATUS_ACCESS_DENIED;\r
\r
- /* FIXME: SEH!!! */\r
+ /* Check for valid name */\r
+ if (AtomNameLength > (RTL_MAXIMUM_ATOM_LENGTH * sizeof(WCHAR)))\r
+ {\r
+ /* Fail */\r
+ DPRINT1("Atom name too long\n");\r
+ return STATUS_INVALID_PARAMETER;\r
+ }\r
+\r
+ /* Check if we're called from user-mode*/\r
+ if (PreviousMode != KernelMode)\r
+ {\r
+ /* Enter SEH */\r
+ _SEH_TRY\r
+ {\r
+ /* Check if we have a name */\r
+ if (AtomName)\r
+ {\r
+ /* Probe the atom */\r
+ ProbeForRead(AtomName, AtomNameLength, sizeof(WCHAR));\r
+\r
+ /* Allocate an aligned buffer + the null char */\r
+ CapturedSize = ((AtomNameLength + sizeof(WCHAR)) &~\r
+ (sizeof(WCHAR) -1));\r
+ CapturedName = ExAllocatePoolWithTag(PagedPool,\r
+ CapturedSize,\r
+ TAG_ATOM);\r
+ if (!CapturedName)\r
+ {\r
+ /* Fail the call */\r
+ Status = STATUS_INSUFFICIENT_RESOURCES;\r
+ }\r
+ else\r
+ {\r
+ /* Copy the name and null-terminate it */\r
+ RtlMoveMemory(CapturedName, AtomName, AtomNameLength);\r
+ CapturedName[AtomNameLength / sizeof(WCHAR)] = UNICODE_NULL;\r
+ }\r
+\r
+ /* Probe the atom too */\r
+ if (Atom) ProbeForWriteUshort(Atom);\r
+ }\r
+ }\r
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)\r
+ {\r
+ Status = _SEH_GetExceptionCode();\r
+ }\r
+ _SEH_END;\r
+ }\r
+ else\r
+ {\r
+ /* Simplify code and re-use one variable */\r
+ if (AtomName) CapturedName = AtomName;\r
+ }\r
\r
- /* Call worker function */\r
- return RtlLookupAtomInAtomTable(AtomTable, AtomName, Atom);\r
+ /* Make sure probe worked */\r
+ if (NT_SUCCESS(Status))\r
+ {\r
+ /* Call the runtime function */\r
+ Status = RtlLookupAtomInAtomTable(AtomTable, CapturedName, &SafeAtom);\r
+ if (NT_SUCCESS(Status) && (Atom))\r
+ {\r
+ /* Success and caller wants the atom back.. .enter SEH */\r
+ _SEH_TRY\r
+ {\r
+ /* Return the atom */\r
+ *Atom = SafeAtom;\r
+ }\r
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)\r
+ {\r
+ Status = _SEH_GetExceptionCode();\r
+ }\r
+ _SEH_END;\r
+ }\r
+ }\r
+\r
+ /* If we captured anything, free it */\r
+ if ((CapturedName) && (CapturedName != AtomName)) ExFreePool(CapturedName);\r
+\r
+ /* Return to caller */\r
+ return Status;\r
}\r
\r
/*\r
PULONG ReturnLength)\r
{\r
PRTL_ATOM_TABLE AtomTable = ExpGetGlobalAtomTable();\r
+ PATOM_BASIC_INFORMATION BasicInformation = AtomInformation;\r
+ PATOM_TABLE_INFORMATION TableInformation = AtomInformation;\r
NTSTATUS Status;\r
+ ULONG Flags, UsageCount, NameLength;\r
\r
/* Check for valid table */\r
if (AtomTable == NULL) return STATUS_ACCESS_DENIED;\r
/* Choose class */\r
switch (AtomInformationClass)\r
{\r
+ /* Caller requested info about an atom */\r
case AtomBasicInformation:\r
- Status = RtlpQueryAtomInformation(AtomTable,\r
- Atom,\r
- AtomInformation,\r
- AtomInformationLength,\r
- ReturnLength);\r
+\r
+ /* Size check */\r
+ *ReturnLength = FIELD_OFFSET(ATOM_BASIC_INFORMATION, Name);\r
+ if (*ReturnLength > AtomInformationLength)\r
+ {\r
+ /* Fail */\r
+ DPRINT1("Buffer too small\n");\r
+ return STATUS_INFO_LENGTH_MISMATCH;\r
+ }\r
+\r
+ /* Prepare query */\r
+ UsageCount = 0;\r
+ NameLength = AtomInformationLength - *ReturnLength;\r
+ BasicInformation->Name[0] = UNICODE_NULL;\r
+\r
+ /* Query the data */\r
+ Status = RtlQueryAtomInAtomTable(AtomTable,\r
+ Atom,\r
+ &UsageCount,\r
+ &Flags,\r
+ BasicInformation->Name,\r
+ &NameLength);\r
+ if (NT_SUCCESS(Status))\r
+ {\r
+ /* Return data */\r
+ BasicInformation->UsageCount = (USHORT)UsageCount;\r
+ BasicInformation->Flags = (USHORT)Flags;\r
+ BasicInformation->NameLength = (USHORT)NameLength;\r
+ *ReturnLength += NameLength + sizeof(WCHAR);\r
+ }\r
break;\r
\r
+ /* Caller requested info about an Atom Table */\r
case AtomTableInformation:\r
- Status = RtlpQueryAtomTableInformation(AtomTable,\r
- Atom,\r
- AtomInformation,\r
- AtomInformationLength,\r
- ReturnLength);\r
+\r
+ /* Size check */\r
+ *ReturnLength = FIELD_OFFSET(ATOM_TABLE_INFORMATION, Atoms);\r
+ if (*ReturnLength > AtomInformationLength)\r
+ {\r
+ /* Fail */\r
+ DPRINT1("Buffer too small\n");\r
+ return STATUS_INFO_LENGTH_MISMATCH;\r
+ }\r
+\r
+ /* Query the data */\r
+ Status = RtlQueryAtomListInAtomTable(AtomTable,\r
+ (AtomInformationLength - *ReturnLength) /\r
+ sizeof(RTL_ATOM),\r
+ &TableInformation->NumberOfAtoms,\r
+ TableInformation->Atoms);\r
+ if (NT_SUCCESS(Status))\r
+ {\r
+ /* Update the return length */\r
+ *ReturnLength += TableInformation->NumberOfAtoms *\r
+ sizeof(RTL_ATOM);\r
+ }\r
break;\r
\r
+ /* Caller was on crack */\r
default:\r
+\r
+ /* Unrecognized class */\r
Status = STATUS_INVALID_INFO_CLASS;\r
}\r
\r
projects / reactos.git / blobdiff