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Allocate a tem buffer for the module names in LdrpQueryModuleInformation, because it isn't possible to call RtlUnicodeStringToAnsiString if the irql is raised to DPC_LEVEL.

Browse Source 
svn path=/trunk/; revision=20067
This commit is contained in:
Hartmut Birr
2005-12-11 17:02:07 +00:00
parent e58e498be4
commit fa63ad2bee
1 changed files with 31 additions and 8 deletions
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reactos/ntoskrnl/ldr/loader.c
+31 -8
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@@ -394,6 +394,9 @@ LdrpQueryModuleInformation (
ANSI_STRING AnsiName;
PCHAR p;
KIRQL Irql;
PUNICODE_STRING UnicodeName;
ULONG tmpBufferSize = 0;
PWCHAR tmpNameBuffer;
KeAcquireSpinLock(&ModuleListLock,&Irql);
@@ -402,6 +405,8 @@ LdrpQueryModuleInformation (
while (current_entry != (&ModuleListHead))
{
ModuleCount++;
current = CONTAINING_RECORD(current_entry,LDR_DATA_TABLE_ENTRY,InLoadOrderModuleList);
tmpBufferSize += current->FullDllName.Length + sizeof(WCHAR) + sizeof(UNICODE_STRING);
current_entry = current_entry->Flink;
}
@@ -414,6 +419,15 @@ LdrpQueryModuleInformation (
return(STATUS_INFO_LENGTH_MISMATCH);
}
/* allocate a temp buffer to store the module names */
UnicodeName = ExAllocatePool(NonPagedPool, tmpBufferSize);
if (UnicodeName == NULL)
{
KeReleaseSpinLock(&ModuleListLock, Irql);
return STATUS_INSUFFICIENT_RESOURCES;
}
tmpNameBuffer = (PWCHAR)((ULONG_PTR)UnicodeName + ModuleCount * sizeof(UNICODE_STRING));
/* fill the buffer */
memset(Buffer, '=', Size);
@@ -434,13 +448,25 @@ LdrpQueryModuleInformation (
Smi->Module[ModuleCount].Index = (USHORT)ModuleCount;
Smi->Module[ModuleCount].NameLength = 0;
Smi->Module[ModuleCount].LoadCount = 0; /* FIXME */
UnicodeName[ModuleCount].Buffer = tmpNameBuffer;
UnicodeName[ModuleCount].MaximumLength = current->FullDllName.Length + sizeof(WCHAR);
tmpNameBuffer += UnicodeName[ModuleCount].MaximumLength / sizeof(WCHAR);
RtlCopyUnicodeString(&UnicodeName[ModuleCount], &current->FullDllName);
ModuleCount++;
current_entry = current_entry->Flink;
}
KeReleaseSpinLock(&ModuleListLock, Irql);
for (ModuleCount = 0; ModuleCount < Smi->Count; ModuleCount++)
{
AnsiName.Length = 0;
AnsiName.MaximumLength = 256;
AnsiName.MaximumLength = 255;
AnsiName.Buffer = Smi->Module[ModuleCount].ImageName;
RtlUnicodeStringToAnsiString(&AnsiName,
&current->FullDllName,
FALSE);
RtlUnicodeStringToAnsiString(&AnsiName, &UnicodeName[ModuleCount], FALSE);
AnsiName.Buffer[AnsiName.Length] = 0;
Smi->Module[ModuleCount].NameLength = AnsiName.Length;
p = strrchr(AnsiName.Buffer, '\\');
if (p == NULL)
@@ -452,12 +478,9 @@ LdrpQueryModuleInformation (
p++;
Smi->Module[ModuleCount].PathLength = p - AnsiName.Buffer;
}
ModuleCount++;
current_entry = current_entry->Flink;
}
KeReleaseSpinLock(&ModuleListLock, Irql);
ExFreePool(UnicodeName);
return(STATUS_SUCCESS);
}