Sweden-Number/dlls/ntdll/loader.c

170 lines
5.2 KiB
C

/*
* Copyright 2002 Dmitry Timoshkov for Codeweavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "winbase.h"
#include "winnt.h"
#include "winternl.h"
#include "module.h"
#include "wine/exception.h"
#include "excpt.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
/* filter for page-fault exceptions */
static WINE_EXCEPTION_FILTER(page_fault)
{
if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
return EXCEPTION_EXECUTE_HANDLER;
return EXCEPTION_CONTINUE_SEARCH;
}
NTSTATUS WINAPI LdrDisableThreadCalloutsForDll(HANDLE hModule)
{
if (DisableThreadLibraryCalls(hModule))
return STATUS_SUCCESS;
else
return STATUS_DLL_NOT_FOUND;
}
/* FIXME : MODULE_FindModule should depend on LdrGetDllHandle, not vice-versa */
NTSTATUS WINAPI LdrGetDllHandle(ULONG x, LONG y, PUNICODE_STRING name, PVOID *base)
{
STRING str;
WINE_MODREF *wm;
FIXME("%08lx %08lx %s %p : partial stub\n",x,y,debugstr_wn(name->Buffer,name->Length),base);
*base = 0;
RtlUnicodeStringToAnsiString(&str, name, TRUE);
wm = MODULE_FindModule(str.Buffer);
if(!wm)
return STATUS_DLL_NOT_FOUND;
*base = (PVOID) wm->module;
return STATUS_SUCCESS;
}
/* FIXME : MODULE_GetProcAddress should depend on LdrGetProcedureAddress, not vice-versa */
NTSTATUS WINAPI LdrGetProcedureAddress(PVOID base, PANSI_STRING name, ULONG ord, PVOID *address)
{
WARN("%p %s %ld %p\n",base, debugstr_an(name->Buffer,name->Length), ord, address);
if(name)
*address = MODULE_GetProcAddress( (HMODULE) base, name->Buffer, -1, FALSE);
else
*address = MODULE_GetProcAddress( (HMODULE) base, (LPSTR) ord, -1, FALSE);
return (*address) ? STATUS_SUCCESS : STATUS_DLL_NOT_FOUND;
}
/***********************************************************************
* RtlImageNtHeader (NTDLL.@)
*/
PIMAGE_NT_HEADERS WINAPI RtlImageNtHeader(HMODULE hModule)
{
IMAGE_NT_HEADERS *ret;
__TRY
{
IMAGE_DOS_HEADER *dos = (IMAGE_DOS_HEADER *)hModule;
ret = NULL;
if (dos->e_magic == IMAGE_DOS_SIGNATURE)
{
ret = (IMAGE_NT_HEADERS *)((char *)dos + dos->e_lfanew);
if (ret->Signature != IMAGE_NT_SIGNATURE) ret = NULL;
}
}
__EXCEPT(page_fault)
{
return NULL;
}
__ENDTRY
return ret;
}
/***********************************************************************
* RtlImageDirectoryEntryToData (NTDLL.@)
*/
PVOID WINAPI RtlImageDirectoryEntryToData( HMODULE module, BOOL image, WORD dir, ULONG *size )
{
const IMAGE_NT_HEADERS *nt;
DWORD addr;
if ((ULONG_PTR)module & 1) /* mapped as data file */
{
module = (HMODULE)((ULONG_PTR)module & ~1);
image = FALSE;
}
if (!(nt = RtlImageNtHeader( module ))) return NULL;
if (dir >= nt->OptionalHeader.NumberOfRvaAndSizes) return NULL;
if (!(addr = nt->OptionalHeader.DataDirectory[dir].VirtualAddress)) return NULL;
*size = nt->OptionalHeader.DataDirectory[dir].Size;
if (image || addr < nt->OptionalHeader.SizeOfHeaders) return (char *)module + addr;
/* not mapped as image, need to find the section containing the virtual address */
return RtlImageRvaToVa( nt, module, addr, NULL );
}
/***********************************************************************
* RtlImageRvaToSection (NTDLL.@)
*/
PIMAGE_SECTION_HEADER WINAPI RtlImageRvaToSection( const IMAGE_NT_HEADERS *nt,
HMODULE module, DWORD rva )
{
int i;
IMAGE_SECTION_HEADER *sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader +
nt->FileHeader.SizeOfOptionalHeader);
for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
{
if ((sec->VirtualAddress <= rva) && (sec->VirtualAddress + sec->SizeOfRawData > rva))
return sec;
}
return NULL;
}
/***********************************************************************
* RtlImageRvaToVa (NTDLL.@)
*/
PVOID WINAPI RtlImageRvaToVa( const IMAGE_NT_HEADERS *nt, HMODULE module,
DWORD rva, IMAGE_SECTION_HEADER **section )
{
IMAGE_SECTION_HEADER *sec;
if (section && *section) /* try this section first */
{
sec = *section;
if ((sec->VirtualAddress <= rva) && (sec->VirtualAddress + sec->SizeOfRawData > rva))
goto found;
}
if (!(sec = RtlImageRvaToSection( nt, module, rva ))) return NULL;
found:
if (section) *section = sec;
return (char *)module + sec->PointerToRawData + (rva - sec->VirtualAddress);
}