mirror of
https://github.com/mirror/processhacker
synced 2026-06-08 16:03:24 +00:00
wj32
54c69a6abb
git-svn-id: svn://svn.code.sf.net/p/processhacker/code@1043 21ef857c-d57f-4fe0-8362-d861dc6d29cd
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
|
|
* Sh Hooking Library -
|
|
* Generic hooks
|
|
*
|
|
* Copyright (C) 2009 wj32
|
|
*
|
|
* This file is part of Process Hacker.
|
|
*
|
|
* Process Hacker is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Process Hacker is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Process Hacker. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "hook.h"
|
|
#include "tlhelp32.h"
|
|
|
|
PVOID SHAPI ShGetProcAddress(
|
|
PSTR LibraryName,
|
|
PSTR ProcName
|
|
)
|
|
{
|
|
return (PVOID)GetProcAddress(GetModuleHandleA(LibraryName), ProcName);
|
|
}
|
|
|
|
NTSTATUS SHAPI ShModifyThreads(
|
|
BOOLEAN Suspend
|
|
)
|
|
{
|
|
HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
|
|
THREADENTRY32 thread;
|
|
|
|
if (snapshot == INVALID_HANDLE_VALUE)
|
|
return STATUS_UNSUCCESSFUL;
|
|
|
|
thread.dwSize = sizeof(THREADENTRY32);
|
|
|
|
if (!Thread32First(snapshot, &thread))
|
|
return STATUS_UNSUCCESSFUL;
|
|
|
|
do
|
|
{
|
|
if (thread.th32OwnerProcessID == GetCurrentProcessId() && thread.th32ThreadID != GetCurrentThreadId())
|
|
{
|
|
HANDLE threadHandle = OpenThread(THREAD_SUSPEND_RESUME, FALSE, thread.th32ThreadID);
|
|
|
|
if (threadHandle)
|
|
{
|
|
if (Suspend)
|
|
SuspendThread(threadHandle);
|
|
else
|
|
ResumeThread(threadHandle);
|
|
|
|
CloseHandle(threadHandle);
|
|
}
|
|
}
|
|
} while (Thread32Next(snapshot, &thread));
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
NTSTATUS SHAPI ShUnpatchCall(
|
|
PHOOK Hook
|
|
)
|
|
{
|
|
ULONG oldProtection;
|
|
|
|
if (!Hook->Hooked)
|
|
return STATUS_NOT_SUPPORTED;
|
|
|
|
VirtualProtect(Hook->Address, Hook->ReplacedLength, PAGE_EXECUTE_READWRITE, &oldProtection);
|
|
|
|
__try
|
|
{
|
|
memcpy(Hook->Address, Hook->ReplacedBytes, Hook->ReplacedLength);
|
|
Hook->Hooked = FALSE;
|
|
}
|
|
__except (EXCEPTION_EXECUTE_HANDLER)
|
|
{
|
|
VirtualProtect(Hook->Address, Hook->ReplacedLength, oldProtection, NULL);
|
|
|
|
return GetExceptionCode();
|
|
}
|
|
|
|
VirtualProtect(Hook->Address, Hook->ReplacedLength, oldProtection, NULL);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|