385 lines
9.0 KiB
C
385 lines
9.0 KiB
C
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#include <windows.h>
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#include <stdio.h>
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#include "apimon.h"
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HANDLE ApiMonMutex;
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PVOID MemPtr;
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PDLL_INFO DllList;
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LPDWORD ApiCounter;
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LPDWORD ApiTraceEnabled;
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LPDWORD ApiTimingEnabled;
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LPDWORD FastCounterAvail;
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LPDWORD ApiOffset;
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LPDWORD ApiStrings;
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LPDWORD ApiCount;
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LPSTR TraceFileName;
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PDLL_INFO
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AddDllToList(
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HANDLE hProcess,
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ULONG DllAddr,
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LPSTR DllName,
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ULONG DllSize
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);
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ULONG
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AddApisForDll(
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HANDLE hProcess,
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PDLL_INFO DllInfo
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);
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int _cdecl
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main(
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int argc,
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char *argv[]
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)
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{
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HANDLE hMap;
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PDLL_INFO DllInfo;
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hMap = CreateFileMapping(
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(HANDLE)0xffffffff,
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NULL,
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PAGE_READWRITE | SEC_COMMIT,
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0,
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MAX_MEM_ALLOC,
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"ApiWatch"
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);
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if (!hMap) {
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return 1;
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}
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MemPtr = (PUCHAR)MapViewOfFile(
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hMap,
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FILE_MAP_WRITE,
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0,
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0,
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0
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);
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if (!MemPtr) {
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return 1;
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}
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ApiMonMutex = CreateMutex( NULL, FALSE, "ApiMonMutex" );
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if (!ApiMonMutex) {
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return FALSE;
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}
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ApiCounter = (LPDWORD)MemPtr + 0;
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ApiTraceEnabled = (LPDWORD)MemPtr + 1;
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ApiTimingEnabled = (LPDWORD)MemPtr + 2;
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FastCounterAvail = (LPDWORD)MemPtr + 3;
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ApiOffset = (LPDWORD)MemPtr + 4;
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ApiStrings = (LPDWORD)MemPtr + 5;
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ApiCount = (LPDWORD)MemPtr + 6;
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TraceFileName = (LPSTR)((LPDWORD)MemPtr + 7);
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DllList = (PDLL_INFO)((LPDWORD)MemPtr + 8 + MAX_PATH);
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*ApiOffset = (MAX_DLLS * sizeof(DLL_INFO)) + ((ULONG)DllList - (ULONG)MemPtr);
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*ApiStrings = (MAX_APIS * sizeof(API_INFO)) + *ApiOffset;
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#if 0
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DllInfo = AddDllToList( NULL,
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HANDLE hProcess,
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ULONG DllAddr,
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LPSTR DllName,
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ULONG DllSize
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);
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#endif
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LoadLibrary( "apidll.dll" );
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return 0;
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}
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BOOL
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ReadMemory(
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HANDLE hProcess,
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PVOID Address,
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PVOID Buffer,
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ULONG Length
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)
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{
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CopyMemory( Buffer, Address, Length );
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return TRUE;
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}
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PDLL_INFO
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FindDllByAddress(
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ULONG DllAddr
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)
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{
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ULONG i;
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for (i=0; i<MAX_DLLS; i++) {
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if (DllList[i].BaseAddress == DllAddr) {
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return &DllList[i];
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}
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}
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return NULL;
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}
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PDLL_INFO
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FindDllByName(
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LPSTR DllName
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)
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{
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ULONG i;
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for (i=0; i<MAX_DLLS; i++) {
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if (DllList[i].Name[0] &&
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_stricmp( DllList[i].Name, DllName ) == 0) {
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return &DllList[i];
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}
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}
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return NULL;
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}
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PDLL_INFO
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FindAvailDll(
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VOID
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)
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{
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ULONG i;
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for (i=0; i<MAX_DLLS; i++) {
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if (!DllList[i].BaseAddress) {
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return &DllList[i];
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}
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}
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return NULL;
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}
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PDLL_INFO
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AddDllToList(
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HANDLE hProcess,
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ULONG DllAddr,
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LPSTR DllName,
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ULONG DllSize
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)
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{
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IMAGE_DOS_HEADER dh;
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IMAGE_NT_HEADERS nh;
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ULONG i;
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PDLL_INFO DllInfo;
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//
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// first look to see if the dll is already in the list
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//
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DllInfo = FindDllByAddress( DllAddr );
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if (!DllSize) {
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//
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// read the pe image headers to get the image size
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//
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if (!ReadMemory(
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hProcess,
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(PVOID) DllAddr,
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&dh,
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sizeof(dh)
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)) {
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return NULL;
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}
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if (dh.e_magic == IMAGE_DOS_SIGNATURE) {
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if (!ReadMemory(
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hProcess,
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(PVOID)(DllAddr + dh.e_lfanew),
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&nh,
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sizeof(nh)
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)) {
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return NULL;
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}
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DllSize = nh.OptionalHeader.SizeOfImage;
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} else {
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DllSize = 0;
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}
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}
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DllInfo = FindAvailDll();
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if (!DllInfo) {
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return NULL;
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}
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DllInfo->Size = DllSize;
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strncat( DllInfo->Name, DllName, MAX_NAME_SZ-1 );
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DllInfo->BaseAddress = DllAddr;
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DllInfo->InList = FALSE;
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DllInfo->Enabled = TRUE;
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return DllInfo;
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}
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ULONG
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AddApisForDll(
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HANDLE hProcess,
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PDLL_INFO DllInfo
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)
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{
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IMAGE_DOS_HEADER dh;
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IMAGE_NT_HEADERS nh;
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IMAGE_EXPORT_DIRECTORY expdir;
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PULONG names = NULL;
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PULONG addrs = NULL;
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PUSHORT ordinals = NULL;
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PUSHORT ordidx = NULL;
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PAPI_INFO ApiInfo = NULL;
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ULONG cnt = 0;
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ULONG idx = 0;
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ULONG i;
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ULONG j;
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LPSTR p;
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if (*ApiCount == MAX_APIS) {
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goto exit;
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}
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if (!ReadMemory(
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hProcess,
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(PVOID)DllInfo->BaseAddress,
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&dh,
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sizeof(dh)
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)) {
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goto exit;
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}
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if (dh.e_magic != IMAGE_DOS_SIGNATURE) {
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goto exit;
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}
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if (!ReadMemory(
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hProcess,
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(PVOID)(DllInfo->BaseAddress + dh.e_lfanew),
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&nh,
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sizeof(nh)
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)) {
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goto exit;
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}
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if (!nh.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress) {
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goto exit;
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}
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if (!ReadMemory(
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hProcess,
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(PVOID)(DllInfo->BaseAddress +
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nh.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress),
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&expdir,
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sizeof(expdir)
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)) {
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goto exit;
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}
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names = (PULONG) LocalAlloc( LPTR, expdir.NumberOfNames * sizeof(ULONG) );
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addrs = (PULONG) LocalAlloc( LPTR, expdir.NumberOfFunctions * sizeof(ULONG) );
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ordinals = (PUSHORT) LocalAlloc( LPTR, expdir.NumberOfNames * sizeof(USHORT) );
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ordidx = (PUSHORT) LocalAlloc( LPTR, expdir.NumberOfFunctions * sizeof(USHORT) );
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if ((!names) || (!addrs) || (!ordinals) || (!ordidx)) {
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goto exit;
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}
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if (!ReadMemory(
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hProcess,
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(PVOID)(DllInfo->BaseAddress + (ULONG)expdir.AddressOfNames),
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names,
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expdir.NumberOfNames * sizeof(ULONG)
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)) {
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goto exit;
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}
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if (!ReadMemory(
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hProcess,
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(PVOID)(DllInfo->BaseAddress + (ULONG)expdir.AddressOfFunctions),
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addrs,
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expdir.NumberOfFunctions * sizeof(ULONG)
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)) {
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goto exit;
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}
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if (!ReadMemory(
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hProcess,
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(PVOID)(DllInfo->BaseAddress + (ULONG)expdir.AddressOfNameOrdinals),
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ordinals,
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expdir.NumberOfNames * sizeof(USHORT)
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)) {
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goto exit;
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}
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DllInfo->ApiCount = expdir.NumberOfFunctions;
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DllInfo->ApiOffset = *ApiOffset;
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*ApiOffset += (DllInfo->ApiCount * sizeof(API_INFO));
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ApiInfo = (PAPI_INFO)(DllInfo->ApiOffset + (ULONG)DllList);
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if (*ApiCount < MAX_APIS) {
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for (i=0; i<expdir.NumberOfNames; i++) {
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idx = ordinals[i];
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ordidx[idx] = TRUE;
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ApiInfo[i].Count = 0;
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ApiInfo[i].ThunkAddress = 0;
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ApiInfo[i].Address = addrs[idx] + DllInfo->BaseAddress;
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j = 0;
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p = (LPSTR)((LPSTR)MemPtr+*ApiStrings);
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do {
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ReadMemory(
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hProcess,
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(PVOID)(DllInfo->BaseAddress + names[i] + j),
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&p[j],
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1
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);
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j += 1;
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} while(p[j-1]);
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ApiInfo[i].Name = *ApiStrings;
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*ApiStrings += (strlen((LPSTR)((LPSTR)MemPtr+*ApiStrings)) + 1);
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*ApiCount += 1;
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if (*ApiCount == MAX_APIS) {
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break;
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}
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}
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}
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if (*ApiCount < MAX_APIS) {
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for (i=0,idx=expdir.NumberOfNames; i<expdir.NumberOfFunctions; i++) {
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if (!ordidx[i]) {
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ApiInfo[idx].Count = 0;
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ApiInfo[idx].ThunkAddress = 0;
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ApiInfo[idx].Address = addrs[i] + DllInfo->BaseAddress;
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sprintf(
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(LPSTR)((LPSTR)MemPtr+*ApiStrings),
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"Ordinal%d",
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i
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);
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ApiInfo[idx].Name = *ApiStrings;
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*ApiStrings += (strlen((LPSTR)((LPSTR)MemPtr+*ApiStrings)) + 1);
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*ApiCount += 1;
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if (*ApiCount == MAX_APIS) {
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break;
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}
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idx += 1;
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}
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}
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}
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cnt = DllInfo->ApiCount;
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exit:
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LocalFree( names );
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LocalFree( addrs );
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LocalFree( ordinals );
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LocalFree( ordidx );
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return cnt;
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}
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