mirror of
https://github.com/reactos/reactos.git
synced 2024-08-21 02:43:48 +00:00
145 lines
3.2 KiB
C
145 lines
3.2 KiB
C
/*
|
|
* PROJECT: ReactOS 'General' Shim library
|
|
* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
|
|
* PURPOSE: Ignore FreeLibrary calls
|
|
* COPYRIGHT: Copyright 2018 Mark Jansen (mark.jansen@reactos.org)
|
|
*/
|
|
|
|
#define WIN32_NO_STATUS
|
|
#include <windef.h>
|
|
#include <winbase.h>
|
|
#include <shimlib.h>
|
|
#include <strsafe.h>
|
|
|
|
|
|
#define SHIM_NS IgnoreFreeLibrary
|
|
#include <setup_shim.inl>
|
|
|
|
typedef BOOL(WINAPI* FREELIBRARYPROC)(HMODULE);
|
|
|
|
const char** g_Names;
|
|
static int g_NameCount;
|
|
|
|
BOOL WINAPI SHIM_OBJ_NAME(FreeLibrary)(HMODULE hModule)
|
|
{
|
|
char Buffer[MAX_PATH], *Ptr = Buffer;
|
|
DWORD len, wanted = ARRAYSIZE(Buffer);
|
|
for (;;)
|
|
{
|
|
len = GetModuleFileNameA(hModule, Ptr, wanted);
|
|
if (len < wanted)
|
|
break;
|
|
|
|
wanted *= 2;
|
|
if (Ptr != Buffer)
|
|
ShimLib_ShimFree(Ptr);
|
|
|
|
Ptr = ShimLib_ShimMalloc(wanted);
|
|
if (!Ptr)
|
|
break;
|
|
}
|
|
|
|
if (Ptr && len)
|
|
{
|
|
char* ModuleName = NULL;
|
|
int n;
|
|
for (; len; len--)
|
|
{
|
|
ModuleName = Ptr + len;
|
|
if (ModuleName[-1] == '/' || ModuleName[-1] == '\\')
|
|
break;
|
|
}
|
|
for (n = 0; n < g_NameCount; ++n)
|
|
{
|
|
if (!stricmp(g_Names[n], ModuleName))
|
|
{
|
|
SHIM_INFO("Prevented unload of %s\n", ModuleName);
|
|
if (Ptr && Ptr != Buffer)
|
|
ShimLib_ShimFree(Ptr);
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Ptr && Ptr != Buffer)
|
|
ShimLib_ShimFree(Ptr);
|
|
|
|
return CALL_SHIM(0, FREELIBRARYPROC)(hModule);
|
|
}
|
|
|
|
static VOID InitIgnoreFreeLibrary(PCSTR CommandLine)
|
|
{
|
|
PCSTR prev, cur;
|
|
int count = 1, n = 0;
|
|
const char** names;
|
|
|
|
if (!CommandLine || !*CommandLine)
|
|
return;
|
|
|
|
prev = CommandLine;
|
|
while ((cur = strchr(prev, ';')))
|
|
{
|
|
count++;
|
|
prev = cur + 1;
|
|
}
|
|
|
|
names = ShimLib_ShimMalloc(sizeof(char*) * count);
|
|
if (!names)
|
|
{
|
|
SHIM_WARN("Unable to allocate %u bytes\n", sizeof(char*) * count);
|
|
return;
|
|
}
|
|
|
|
prev = CommandLine;
|
|
while ((cur = strchr(prev, ';')))
|
|
{
|
|
names[n] = ShimLib_StringNDuplicateA(prev, cur - prev + 1);
|
|
if (!names[n])
|
|
{
|
|
SHIM_WARN("Unable to allocate %u bytes\n", cur - prev + 2);
|
|
goto fail;
|
|
}
|
|
n++;
|
|
prev = cur + 1;
|
|
}
|
|
names[n] = ShimLib_StringDuplicateA(prev);
|
|
if (!names[n])
|
|
{
|
|
SHIM_WARN("Unable to allocate last string\n");
|
|
goto fail;
|
|
}
|
|
|
|
g_Names = names;
|
|
g_NameCount = count;
|
|
return;
|
|
|
|
fail:
|
|
--n;
|
|
while (n >= 0)
|
|
{
|
|
if (names[n])
|
|
ShimLib_ShimFree((PVOID)names[n]);
|
|
|
|
--n;
|
|
}
|
|
ShimLib_ShimFree(names);
|
|
}
|
|
|
|
BOOL WINAPI SHIM_OBJ_NAME(Notify)(DWORD fdwReason, PVOID ptr)
|
|
{
|
|
if (fdwReason == SHIM_NOTIFY_ATTACH)
|
|
{
|
|
SHIM_MSG("IgnoreFreeLibrary(%s)\n", SHIM_OBJ_NAME(g_szCommandLine));
|
|
InitIgnoreFreeLibrary(SHIM_OBJ_NAME(g_szCommandLine));
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
#define SHIM_NOTIFY_FN SHIM_OBJ_NAME(Notify)
|
|
#define SHIM_NUM_HOOKS 1
|
|
#define SHIM_SETUP_HOOKS \
|
|
SHIM_HOOK(0, "KERNEL32.DLL", "FreeLibrary", SHIM_OBJ_NAME(FreeLibrary))
|
|
|
|
#include <implement_shim.inl>
|