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LdrGetExportByOrdinal was broken

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LdrGetExportByName: fixed bug visible when number of exported functions > number of exported names + check for zero symbol name export table

svn path=/trunk/; revision=4328
This commit is contained in:
Gunnar Dalsnes 2003-03-17 23:05:07 +00:00
parent b41c5aa867
commit 04719148b0
1 changed files with 17 additions and 7 deletions
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22
reactos/lib/ntdll/ldr/utils.c
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@ -1,4 +1,4 @@
/* $Id: utils.c,v 1.59 2003/01/31 21:49:11 hbirr Exp $
/* $Id: utils.c,v 1.60 2003/03/17 23:05:07 gdalsnes Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -659,9 +659,9 @@ LdrGetExportByOrdinal (
DbgPrint(
"LdrGetExportByOrdinal(Ordinal %d) = %x\n",
Ordinal,
ExFunctions[ExOrdinals[Ordinal - ExportDir->Base]]
RVA(BaseAddress, ExFunctions[Ordinal - ExportDir->Base] )
);
return(ExFunctions[ExOrdinals[Ordinal - ExportDir->Base]]);
return(RVA(BaseAddress, ExFunctions[Ordinal - ExportDir->Base] ));
}
@ -678,6 +678,8 @@ LdrGetExportByOrdinal (
* REVISIONS
*
* NOTE
* AddressOfNames and AddressOfNameOrdinals are paralell tables,
* both with NumberOfNames entries.
*
*/
static PVOID
@ -709,6 +711,14 @@ LdrGetExportByName(PVOID BaseAddress,
return NULL;
}
//The symbol names may be missing entirely
if (ExportDir->AddressOfNames == 0)
{
DPRINT("LdrGetExportByName(): symbol names missing entirely\n");
return NULL;
}
/*
* Get header pointers
*/
@ -722,7 +732,7 @@ LdrGetExportByName(PVOID BaseAddress,
/*
* Check the hint first
*/
if (Hint < ExportDir->NumberOfFunctions)
if (Hint < ExportDir->NumberOfNames)
{
ExName = RVA(BaseAddress, ExNames[Hint]);
if (strcmp(ExName, SymbolName) == 0)
@ -744,7 +754,7 @@ LdrGetExportByName(PVOID BaseAddress,
* Try a binary search first
*/
minn = 0;
maxn = ExportDir->NumberOfFunctions;
maxn = ExportDir->NumberOfNames;
while (minn <= maxn)
{
ULONG mid;
@ -786,7 +796,7 @@ LdrGetExportByName(PVOID BaseAddress,
* Fall back on a linear search
*/
DPRINT("LdrGetExportByName(): Falling back on a linear search of export table\n");
for (i = 0; i < ExportDir->NumberOfFunctions; i++)
for (i = 0; i < ExportDir->NumberOfNames; i++)
{
ExName = RVA(BaseAddress, ExNames[i]);
if (strcmp(ExName,SymbolName) == 0)