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[FREELDR] peloader.c: Minor code enhancements.

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PeLdrCheckForLoadedDll():
- Use a for-loop to iterate over the linked list.
- Adjust few comments.
- Use SAL2 annotations.

PeLdrpCompareDllName():
- Make its input paramters const.
- Use SAL2 annotations.
This commit is contained in:
Hermès Bélusca-Maïto 2024-11-25 22:43:56 +01:00
parent 4d376dfd64
commit ba342e1d14
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2 changed files with 24 additions and 26 deletions
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6
boot/freeldr/freeldr/include/peloader.h
View file

@ -63,9 +63,9 @@ PeLdrScanImportDescriptorTable(
BOOLEAN BOOLEAN
PeLdrCheckForLoadedDll( PeLdrCheckForLoadedDll(
IN OUT PLIST_ENTRY ModuleListHead, _Inout_ PLIST_ENTRY ModuleListHead,
IN PCH DllName, _In_ PCSTR DllName,
OUT PLDR_DATA_TABLE_ENTRY *LoadedEntry); _Out_ PLDR_DATA_TABLE_ENTRY* LoadedEntry);
PVOID PVOID
PeLdrInitSecurityCookie( PeLdrInitSecurityCookie(

40
boot/freeldr/freeldr/lib/peloader.c
View file

@ -74,11 +74,11 @@ PeLdrpFetchAddressOfSecurityCookie(PVOID BaseAddress, ULONG SizeOfImage)
return Cookie; return Cookie;
} }
/* DllName - physical, UnicodeString->Buffer - virtual */ /* DllName: physical, UnicodeString->Buffer: virtual */
static BOOLEAN static BOOLEAN
PeLdrpCompareDllName( PeLdrpCompareDllName(
IN PCH DllName, _In_ PCSTR DllName,
IN PUNICODE_STRING UnicodeName) _In_ PCUNICODE_STRING UnicodeName)
{ {
PWSTR Buffer; PWSTR Buffer;
SIZE_T i, Length; SIZE_T i, Length;
@ -92,8 +92,8 @@ PeLdrpCompareDllName(
UnicodeNamePA.Length = UnicodeName->Length; UnicodeNamePA.Length = UnicodeName->Length;
UnicodeNamePA.MaximumLength = UnicodeName->MaximumLength; UnicodeNamePA.MaximumLength = UnicodeName->MaximumLength;
UnicodeNamePA.Buffer = VaToPa(UnicodeName->Buffer); UnicodeNamePA.Buffer = VaToPa(UnicodeName->Buffer);
TRACE("PeLdrpCompareDllName: %s and %wZ, Length = %d " TRACE("PeLdrpCompareDllName: %s and %wZ, Length = %d, UN->Length %d\n",
"UN->Length %d\n", DllName, &UnicodeNamePA, Length, UnicodeName->Length); DllName, &UnicodeNamePA, Length, UnicodeName->Length);
} }
#endif #endif
@ -122,7 +122,7 @@ PeLdrpCompareDllName(
return TRUE; return TRUE;
} }
/* Strings don't match, return FALSE */ /* Strings don't match */
return FALSE; return FALSE;
} }
@ -582,24 +582,25 @@ PeLdrInitSecurityCookie(PLDR_DATA_TABLE_ENTRY LdrEntry)
return Cookie; return Cookie;
} }
/* Returns TRUE if DLL has already been loaded - looks in LoadOrderList in LPB */ /* Returns TRUE if the DLL has already been loaded in the module list */
BOOLEAN BOOLEAN
PeLdrCheckForLoadedDll( PeLdrCheckForLoadedDll(
IN OUT PLIST_ENTRY ModuleListHead, _Inout_ PLIST_ENTRY ModuleListHead,
IN PCH DllName, _In_ PCSTR DllName,
OUT PLDR_DATA_TABLE_ENTRY *LoadedEntry) _Out_ PLDR_DATA_TABLE_ENTRY* LoadedEntry)
{ {
PLIST_ENTRY ModuleEntry;
PLDR_DATA_TABLE_ENTRY DataTableEntry; PLDR_DATA_TABLE_ENTRY DataTableEntry;
LIST_ENTRY *ModuleEntry;
TRACE("PeLdrCheckForLoadedDll: DllName %s\n", DllName); TRACE("PeLdrCheckForLoadedDll: DllName %s\n", DllName);
/* Just go through each entry in the LoadOrderList and compare loaded module's /* Go through each entry in the LoadOrderList and
name with a given name */ * compare the module's name with the given name */
ModuleEntry = ModuleListHead->Flink; for (ModuleEntry = ModuleListHead->Flink;
while (ModuleEntry != ModuleListHead) ModuleEntry != ModuleListHead;
ModuleEntry = ModuleEntry->Flink)
{ {
/* Get pointer to the current DTE */ /* Get a pointer to the current DTE */
DataTableEntry = CONTAINING_RECORD(ModuleEntry, DataTableEntry = CONTAINING_RECORD(ModuleEntry,
LDR_DATA_TABLE_ENTRY, LDR_DATA_TABLE_ENTRY,
InLoadOrderLinks); InLoadOrderLinks);
@ -612,16 +613,13 @@ PeLdrCheckForLoadedDll(
/* Compare names */ /* Compare names */
if (PeLdrpCompareDllName(DllName, &DataTableEntry->BaseDllName)) if (PeLdrpCompareDllName(DllName, &DataTableEntry->BaseDllName))
{ {
/* Yes, found it, report pointer to the loaded module's DTE /* Found it, return a pointer to the loaded module's
to the caller and increase load count for it */ * DTE to the caller and increase its load count */
*LoadedEntry = DataTableEntry; *LoadedEntry = DataTableEntry;
DataTableEntry->LoadCount++; DataTableEntry->LoadCount++;
TRACE("PeLdrCheckForLoadedDll: LoadedEntry 0x%p\n", DataTableEntry); TRACE("PeLdrCheckForLoadedDll: LoadedEntry 0x%p\n", DataTableEntry);
return TRUE; return TRUE;
} }
/* Go to the next entry */
ModuleEntry = ModuleEntry->Flink;
} }
/* Nothing found */ /* Nothing found */