Moved some more definitions out of undocshell.h into the exported

[wine/multimedia.git] / dlls / ntdll / loader.c

/*
 * Loader functions
 *
 * Copyright 1995, 2003 Alexandre Julliard
 * 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 "config.h"
#include "wine/port.h"

#include <assert.h>
#include <stdarg.h>

#include "windef.h"
#include "winbase.h"
#include "winnt.h"
#include "winreg.h"
#include "winternl.h"

#include "module.h"
#include "wine/exception.h"
#include "excpt.h"
#include "wine/unicode.h"
#include "wine/debug.h"
#include "wine/server.h"
#include "ntdll_misc.h"

WINE_DEFAULT_DEBUG_CHANNEL(module);
WINE_DECLARE_DEBUG_CHANNEL(relay);
WINE_DECLARE_DEBUG_CHANNEL(snoop);
WINE_DECLARE_DEBUG_CHANNEL(loaddll);

typedef DWORD (CALLBACK *DLLENTRYPROC)(HMODULE,DWORD,LPVOID);

static int process_detaching = 0;  /* set on process detach to avoid deadlocks with thread detach */
static int free_lib_count;   /* recursion depth of LdrUnloadDll calls */

/* filter for page-fault exceptions */
static WINE_EXCEPTION_FILTER(page_fault)
{
    if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
        return EXCEPTION_EXECUTE_HANDLER;
    return EXCEPTION_CONTINUE_SEARCH;
}

static const char * const reason_names[] =
{
    "PROCESS_DETACH",
    "PROCESS_ATTACH",
    "THREAD_ATTACH",
    "THREAD_DETACH"
};

static const WCHAR dllW[] = {'.','d','l','l',0};

/* internal representation of 32bit modules. per process. */
typedef struct _wine_modref
{
    LDR_MODULE            ldr;
    int                   nDeps;
    struct _wine_modref **deps;
} WINE_MODREF;

/* info about the current builtin dll load */
/* used to keep track of things across the register_dll constructor call */
struct builtin_load_info
{
    const WCHAR *load_path;
    NTSTATUS     status;
    WINE_MODREF *wm;
};

static struct builtin_load_info default_load_info;
static struct builtin_load_info *builtin_load_info = &default_load_info;

static UINT tls_module_count;      /* number of modules with TLS directory */
static UINT tls_total_size;        /* total size of TLS storage */
static const IMAGE_TLS_DIRECTORY **tls_dirs;  /* array of TLS directories */

static UNICODE_STRING system_dir;  /* system directory */

static CRITICAL_SECTION loader_section;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
    0, 0, &loader_section,
    { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
      0, 0, { 0, (DWORD)(__FILE__ ": loader_section") }
};
static CRITICAL_SECTION loader_section = { &critsect_debug, -1, 0, 0, 0, 0 };

static WINE_MODREF *cached_modref;
static WINE_MODREF *current_modref;

static NTSTATUS load_dll( LPCWSTR load_path, LPCWSTR libname, DWORD flags, WINE_MODREF** pwm );
static FARPROC find_named_export( HMODULE module, IMAGE_EXPORT_DIRECTORY *exports,
                                  DWORD exp_size, const char *name, int hint );

/* convert PE image VirtualAddress to Real Address */
inline static void *get_rva( HMODULE module, DWORD va )
{
    return (void *)((char *)module + va);
}

/* check whether the file name contains a path */
inline static int contains_path( LPCWSTR name )
{
    return ((*name && (name[1] == ':')) || strchrW(name, '/') || strchrW(name, '\\'));
}

/* convert from straight ASCII to Unicode without depending on the current codepage */
inline static void ascii_to_unicode( WCHAR *dst, const char *src, size_t len )
{
    while (len--) *dst++ = (unsigned char)*src++;
}

/*************************************************************************
 *              get_modref
 *
 * Looks for the referenced HMODULE in the current process
 * The loader_section must be locked while calling this function.
 */
static WINE_MODREF *get_modref( HMODULE hmod )
{
    PLIST_ENTRY mark, entry;
    PLDR_MODULE mod;

    if (cached_modref && cached_modref->ldr.BaseAddress == hmod) return cached_modref;

    mark = &NtCurrentTeb()->Peb->LdrData->InMemoryOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        mod = CONTAINING_RECORD(entry, LDR_MODULE, InMemoryOrderModuleList);
        if (mod->BaseAddress == hmod)
            return cached_modref = CONTAINING_RECORD(mod, WINE_MODREF, ldr);
        if (mod->BaseAddress > (void*)hmod) break;
    }
    return NULL;
}


/**********************************************************************
 *          find_basename_module
 *
 * Find a module from its base name.
 * The loader_section must be locked while calling this function
 */
static WINE_MODREF *find_basename_module( LPCWSTR name )
{
    PLIST_ENTRY mark, entry;

    if (cached_modref && !strcmpiW( name, cached_modref->ldr.BaseDllName.Buffer ))
        return cached_modref;

    mark = &NtCurrentTeb()->Peb->LdrData->InLoadOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        LDR_MODULE *mod = CONTAINING_RECORD(entry, LDR_MODULE, InLoadOrderModuleList);
        if (!strcmpiW( name, mod->BaseDllName.Buffer ))
        {
            cached_modref = CONTAINING_RECORD(mod, WINE_MODREF, ldr);
            return cached_modref;
        }
    }
    return NULL;
}


/**********************************************************************
 *          find_fullname_module
 *
 * Find a module from its full path name.
 * The loader_section must be locked while calling this function
 */
static WINE_MODREF *find_fullname_module( LPCWSTR name )
{
    PLIST_ENTRY mark, entry;

    if (cached_modref && !strcmpiW( name, cached_modref->ldr.FullDllName.Buffer ))
        return cached_modref;

    mark = &NtCurrentTeb()->Peb->LdrData->InLoadOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        LDR_MODULE *mod = CONTAINING_RECORD(entry, LDR_MODULE, InLoadOrderModuleList);
        if (!strcmpiW( name, mod->FullDllName.Buffer ))
        {
            cached_modref = CONTAINING_RECORD(mod, WINE_MODREF, ldr);
            return cached_modref;
        }
    }
    return NULL;
}


/*************************************************************************
 *              find_forwarded_export
 *
 * Find the final function pointer for a forwarded function.
 * The loader_section must be locked while calling this function.
 */
static FARPROC find_forwarded_export( HMODULE module, const char *forward )
{
    IMAGE_EXPORT_DIRECTORY *exports;
    DWORD exp_size;
    WINE_MODREF *wm;
    WCHAR mod_name[32];
    char *end = strchr(forward, '.');
    FARPROC proc = NULL;

    if (!end) return NULL;
    if ((end - forward) * sizeof(WCHAR) >= sizeof(mod_name) - sizeof(dllW)) return NULL;
    ascii_to_unicode( mod_name, forward, end - forward );
    memcpy( mod_name + (end - forward), dllW, sizeof(dllW) );

    if (!(wm = find_basename_module( mod_name )))
    {
        ERR("module not found for forward '%s' used by %s\n",
            forward, debugstr_w(get_modref(module)->ldr.FullDllName.Buffer) );
        return NULL;
    }
    if ((exports = RtlImageDirectoryEntryToData( wm->ldr.BaseAddress, TRUE,
                                                 IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
        proc = find_named_export( wm->ldr.BaseAddress, exports, exp_size, end + 1, -1 );

    if (!proc)
    {
        ERR("function not found for forward '%s' used by %s."
            " If you are using builtin %s, try using the native one instead.\n",
            forward, debugstr_w(get_modref(module)->ldr.FullDllName.Buffer),
            debugstr_w(get_modref(module)->ldr.BaseDllName.Buffer) );
    }
    return proc;
}


/*************************************************************************
 *              find_ordinal_export
 *
 * Find an exported function by ordinal.
 * The exports base must have been subtracted from the ordinal already.
 * The loader_section must be locked while calling this function.
 */
static FARPROC find_ordinal_export( HMODULE module, IMAGE_EXPORT_DIRECTORY *exports,
                                    DWORD exp_size, int ordinal )
{
    FARPROC proc;
    DWORD *functions = get_rva( module, exports->AddressOfFunctions );

    if (ordinal >= exports->NumberOfFunctions)
    {
        TRACE(" ordinal %ld out of range!\n", ordinal + exports->Base );
        return NULL;
    }
    if (!functions[ordinal]) return NULL;

    proc = get_rva( module, functions[ordinal] );

    /* if the address falls into the export dir, it's a forward */
    if (((char *)proc >= (char *)exports) && ((char *)proc < (char *)exports + exp_size))
        return find_forwarded_export( module, (char *)proc );

    if (TRACE_ON(snoop))
    {
        proc = SNOOP_GetProcAddress( module, exports, exp_size, proc, ordinal );
    }
    if (TRACE_ON(relay) && current_modref)
    {
        proc = RELAY_GetProcAddress( module, exports, exp_size, proc,
                                     current_modref->ldr.BaseDllName.Buffer );
    }
    return proc;
}


/*************************************************************************
 *              find_named_export
 *
 * Find an exported function by name.
 * The loader_section must be locked while calling this function.
 */
static FARPROC find_named_export( HMODULE module, IMAGE_EXPORT_DIRECTORY *exports,
                                  DWORD exp_size, const char *name, int hint )
{
    WORD *ordinals = get_rva( module, exports->AddressOfNameOrdinals );
    DWORD *names = get_rva( module, exports->AddressOfNames );
    int min = 0, max = exports->NumberOfNames - 1;

    /* first check the hint */
    if (hint >= 0 && hint <= max)
    {
        char *ename = get_rva( module, names[hint] );
        if (!strcmp( ename, name ))
            return find_ordinal_export( module, exports, exp_size, ordinals[hint] );
    }

    /* then do a binary search */
    while (min <= max)
    {
        int res, pos = (min + max) / 2;
        char *ename = get_rva( module, names[pos] );
        if (!(res = strcmp( ename, name )))
            return find_ordinal_export( module, exports, exp_size, ordinals[pos] );
        if (res > 0) max = pos - 1;
        else min = pos + 1;
    }
    return NULL;

}


/*************************************************************************
 *              import_dll
 *
 * Import the dll specified by the given import descriptor.
 * The loader_section must be locked while calling this function.
 */
static WINE_MODREF *import_dll( HMODULE module, IMAGE_IMPORT_DESCRIPTOR *descr, LPCWSTR load_path )
{
    NTSTATUS status;
    WINE_MODREF *wmImp;
    HMODULE imp_mod;
    IMAGE_EXPORT_DIRECTORY *exports;
    DWORD exp_size;
    IMAGE_THUNK_DATA *import_list, *thunk_list;
    WCHAR buffer[32];
    char *name = get_rva( module, descr->Name );
    DWORD len = strlen(name) + 1;

    thunk_list = get_rva( module, (DWORD)descr->FirstThunk );
    if (descr->u.OriginalFirstThunk)
        import_list = get_rva( module, (DWORD)descr->u.OriginalFirstThunk );
    else
        import_list = thunk_list;

    if (len * sizeof(WCHAR) <= sizeof(buffer))
    {
        ascii_to_unicode( buffer, name, len );
        status = load_dll( load_path, buffer, 0, &wmImp );
    }
    else  /* need to allocate a larger buffer */
    {
        WCHAR *ptr = RtlAllocateHeap( GetProcessHeap(), 0, len * sizeof(WCHAR) );
        if (!ptr) return NULL;
        ascii_to_unicode( ptr, name, len );
        status = load_dll( load_path, ptr, 0, &wmImp );
        RtlFreeHeap( GetProcessHeap(), 0, ptr );
    }

    if (status)
    {
        if (status == STATUS_DLL_NOT_FOUND)
            ERR("Module (file) %s (which is needed by %s) not found\n",
                name, debugstr_w(current_modref->ldr.FullDllName.Buffer));
        else
            ERR("Loading module (file) %s (which is needed by %s) failed (error %lx).\n",
                name, debugstr_w(current_modref->ldr.FullDllName.Buffer), status);
        imp_mod = NULL;
        exports = NULL;
    }
    else
    {
        imp_mod = wmImp->ldr.BaseAddress;
        exports = RtlImageDirectoryEntryToData( imp_mod, TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size );
    }

    if (!exports)
    {
        /* set all imported function to deadbeef */
        while (import_list->u1.Ordinal)
        {
            if (IMAGE_SNAP_BY_ORDINAL(import_list->u1.Ordinal))
            {
                ERR("No implementation for %s.%ld", name, IMAGE_ORDINAL(import_list->u1.Ordinal));
            }
            else
            {
                IMAGE_IMPORT_BY_NAME *pe_name = get_rva( module, (DWORD)import_list->u1.AddressOfData );
                ERR("No implementation for %s.%s", name, pe_name->Name );
            }
            ERR(" imported from %s, setting to 0xdeadbeef\n",
                debugstr_w(current_modref->ldr.FullDllName.Buffer) );
            thunk_list->u1.Function = (PDWORD)0xdeadbeef;

            import_list++;
            thunk_list++;
        }
        return wmImp;
    }

    while (import_list->u1.Ordinal)
    {
        if (IMAGE_SNAP_BY_ORDINAL(import_list->u1.Ordinal))
        {
            int ordinal = IMAGE_ORDINAL(import_list->u1.Ordinal);

            thunk_list->u1.Function = (PDWORD)find_ordinal_export( imp_mod, exports, exp_size,
                                                                   ordinal - exports->Base );
            if (!thunk_list->u1.Function)
            {
                ERR("No implementation for %s.%d imported from %s, setting to 0xdeadbeef\n",
                    name, ordinal, debugstr_w(current_modref->ldr.FullDllName.Buffer) );
                thunk_list->u1.Function = (PDWORD)0xdeadbeef;
            }
            TRACE("--- Ordinal %s.%d = %p\n", name, ordinal, thunk_list->u1.Function );
        }
        else  /* import by name */
        {
            IMAGE_IMPORT_BY_NAME *pe_name;
            pe_name = get_rva( module, (DWORD)import_list->u1.AddressOfData );
            thunk_list->u1.Function = (PDWORD)find_named_export( imp_mod, exports, exp_size,
                                                                 pe_name->Name, pe_name->Hint );
            if (!thunk_list->u1.Function)
            {
                ERR("No implementation for %s.%s imported from %s, setting to 0xdeadbeef\n",
                    name, pe_name->Name, debugstr_w(current_modref->ldr.FullDllName.Buffer) );
                thunk_list->u1.Function = (PDWORD)0xdeadbeef;
            }
            TRACE("--- %s %s.%d = %p\n", pe_name->Name, name, pe_name->Hint, thunk_list->u1.Function);
        }
        import_list++;
        thunk_list++;
    }
    return wmImp;
}


/****************************************************************
 *       fixup_imports
 *
 * Fixup all imports of a given module.
 * The loader_section must be locked while calling this function.
 */
static NTSTATUS fixup_imports( WINE_MODREF *wm, LPCWSTR load_path )
{
    int i, nb_imports;
    IMAGE_IMPORT_DESCRIPTOR *imports;
    WINE_MODREF *prev;
    DWORD size;
    NTSTATUS status;

    if (!(imports = RtlImageDirectoryEntryToData( wm->ldr.BaseAddress, TRUE,
                                                  IMAGE_DIRECTORY_ENTRY_IMPORT, &size )))
        return STATUS_SUCCESS;

    nb_imports = size / sizeof(*imports);
    for (i = 0; i < nb_imports; i++)
    {
        if (!imports[i].Name)
        {
            nb_imports = i;
            break;
        }
    }
    if (!nb_imports) return STATUS_SUCCESS;  /* no imports */

    /* Allocate module dependency list */
    wm->nDeps = nb_imports;
    wm->deps  = RtlAllocateHeap( ntdll_get_process_heap(), 0, nb_imports*sizeof(WINE_MODREF *) );

    /* load the imported modules. They are automatically
     * added to the modref list of the process.
     */
    prev = current_modref;
    current_modref = wm;
    status = STATUS_SUCCESS;
    for (i = 0; i < nb_imports; i++)
    {
        if (!(wm->deps[i] = import_dll( wm->ldr.BaseAddress, &imports[i], load_path )))
            status = STATUS_DLL_NOT_FOUND;
    }
    current_modref = prev;
    return status;
}


/*************************************************************************
 *              alloc_module
 *
 * Allocate a WINE_MODREF structure and add it to the process list
 * The loader_section must be locked while calling this function.
 */
static WINE_MODREF *alloc_module( HMODULE hModule, LPCWSTR filename )
{
    WINE_MODREF *wm;
    WCHAR *p;
    IMAGE_NT_HEADERS *nt = RtlImageNtHeader(hModule);
    PLIST_ENTRY entry, mark;

    if (!(wm = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*wm) ))) return NULL;

    wm->nDeps    = 0;
    wm->deps     = NULL;

    wm->ldr.BaseAddress   = hModule;
    wm->ldr.EntryPoint    = NULL;
    wm->ldr.SizeOfImage   = nt->OptionalHeader.SizeOfImage;
    wm->ldr.Flags         = 0;
    wm->ldr.LoadCount     = 0;
    wm->ldr.TlsIndex      = -1;
    wm->ldr.SectionHandle = NULL;
    wm->ldr.CheckSum      = 0;
    wm->ldr.TimeDateStamp = 0;

    RtlCreateUnicodeString( &wm->ldr.FullDllName, filename );
    if ((p = strrchrW( wm->ldr.FullDllName.Buffer, '\\' ))) p++;
    else p = wm->ldr.FullDllName.Buffer;
    RtlInitUnicodeString( &wm->ldr.BaseDllName, p );

    if (nt->FileHeader.Characteristics & IMAGE_FILE_DLL)
    {
        wm->ldr.Flags |= LDR_IMAGE_IS_DLL;
        if (nt->OptionalHeader.AddressOfEntryPoint)
            wm->ldr.EntryPoint = (char *)hModule + nt->OptionalHeader.AddressOfEntryPoint;
    }

    InsertTailList(&NtCurrentTeb()->Peb->LdrData->InLoadOrderModuleList,
                   &wm->ldr.InLoadOrderModuleList);

    /* insert module in MemoryList, sorted in increasing base addresses */
    mark = &NtCurrentTeb()->Peb->LdrData->InMemoryOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        if (CONTAINING_RECORD(entry, LDR_MODULE, InMemoryOrderModuleList)->BaseAddress > wm->ldr.BaseAddress)
            break;
    }
    entry->Blink->Flink = &wm->ldr.InMemoryOrderModuleList;
    wm->ldr.InMemoryOrderModuleList.Blink = entry->Blink;
    wm->ldr.InMemoryOrderModuleList.Flink = entry;
    entry->Blink = &wm->ldr.InMemoryOrderModuleList;

    /* wait until init is called for inserting into this list */
    wm->ldr.InInitializationOrderModuleList.Flink = NULL;
    wm->ldr.InInitializationOrderModuleList.Blink = NULL;
    return wm;
}


/*************************************************************************
 *              alloc_process_tls
 *
 * Allocate the process-wide structure for module TLS storage.
 */
static NTSTATUS alloc_process_tls(void)
{
    PLIST_ENTRY mark, entry;
    PLDR_MODULE mod;
    IMAGE_TLS_DIRECTORY *dir;
    ULONG size, i;

    mark = &NtCurrentTeb()->Peb->LdrData->InMemoryOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        mod = CONTAINING_RECORD(entry, LDR_MODULE, InMemoryOrderModuleList);
        if (!(dir = RtlImageDirectoryEntryToData( mod->BaseAddress, TRUE,
                                                  IMAGE_DIRECTORY_ENTRY_TLS, &size )))
            continue;
        size = (dir->EndAddressOfRawData - dir->StartAddressOfRawData) + dir->SizeOfZeroFill;
        if (!size) continue;
        tls_total_size += size;
        tls_module_count++;
    }
    if (!tls_module_count) return STATUS_SUCCESS;

    TRACE( "count %u size %u\n", tls_module_count, tls_total_size );

    tls_dirs = RtlAllocateHeap( ntdll_get_process_heap(), 0, tls_module_count * sizeof(*tls_dirs) );
    if (!tls_dirs) return STATUS_NO_MEMORY;

    for (i = 0, entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        mod = CONTAINING_RECORD(entry, LDR_MODULE, InMemoryOrderModuleList);
        if (!(dir = RtlImageDirectoryEntryToData( mod->BaseAddress, TRUE,
                                                  IMAGE_DIRECTORY_ENTRY_TLS, &size )))
            continue;
        tls_dirs[i] = dir;
        *dir->AddressOfIndex = i;
        mod->TlsIndex = i;
        mod->LoadCount = -1;  /* can't unload it */
        i++;
    }
    return STATUS_SUCCESS;
}


/*************************************************************************
 *              alloc_thread_tls
 *
 * Allocate the per-thread structure for module TLS storage.
 */
static NTSTATUS alloc_thread_tls(void)
{
    void **pointers;
    char *data;
    UINT i;

    if (!tls_module_count) return STATUS_SUCCESS;

    if (!(pointers = RtlAllocateHeap( ntdll_get_process_heap(), 0,
                                      tls_module_count * sizeof(*pointers) )))
        return STATUS_NO_MEMORY;

    if (!(data = RtlAllocateHeap( ntdll_get_process_heap(), 0, tls_total_size )))
    {
        RtlFreeHeap( ntdll_get_process_heap(), 0, pointers );
        return STATUS_NO_MEMORY;
    }

    for (i = 0; i < tls_module_count; i++)
    {
        const IMAGE_TLS_DIRECTORY *dir = tls_dirs[i];
        ULONG size = dir->EndAddressOfRawData - dir->StartAddressOfRawData;

        TRACE( "thread %04lx idx %d: %ld/%ld bytes from %p to %p\n",
               GetCurrentThreadId(), i, size, dir->SizeOfZeroFill,
               (void *)dir->StartAddressOfRawData, data );

        pointers[i] = data;
        memcpy( data, (void *)dir->StartAddressOfRawData, size );
        data += size;
        memset( data, 0, dir->SizeOfZeroFill );
        data += dir->SizeOfZeroFill;
    }
    NtCurrentTeb()->ThreadLocalStoragePointer = pointers;
    return STATUS_SUCCESS;
}


/*************************************************************************
 *              call_tls_callbacks
 */
static void call_tls_callbacks( HMODULE module, UINT reason )
{
    const IMAGE_TLS_DIRECTORY *dir;
    const PIMAGE_TLS_CALLBACK *callback;
    ULONG dirsize;

    dir = RtlImageDirectoryEntryToData( module, TRUE, IMAGE_DIRECTORY_ENTRY_TLS, &dirsize );
    if (!dir || !dir->AddressOfCallBacks) return;

    for (callback = dir->AddressOfCallBacks; *callback; callback++)
    {
        if (TRACE_ON(relay))
            DPRINTF("%04lx:Call TLS callback (proc=%p,module=%p,reason=%s,reserved=0)\n",
                    GetCurrentThreadId(), *callback, module, reason_names[reason] );
        (*callback)( module, reason, NULL );
        if (TRACE_ON(relay))
            DPRINTF("%04lx:Ret  TLS callback (proc=%p,module=%p,reason=%s,reserved=0)\n",
                    GetCurrentThreadId(), *callback, module, reason_names[reason] );
    }
}


/*************************************************************************
 *              MODULE_InitDLL
 */
static BOOL MODULE_InitDLL( WINE_MODREF *wm, UINT reason, LPVOID lpReserved )
{
    WCHAR mod_name[32];
    BOOL retv = TRUE;
    DLLENTRYPROC entry = wm->ldr.EntryPoint;
    void *module = wm->ldr.BaseAddress;

    /* Skip calls for modules loaded with special load flags */

    if (wm->ldr.Flags & LDR_DONT_RESOLVE_REFS) return TRUE;
    if (wm->ldr.TlsIndex != -1) call_tls_callbacks( wm->ldr.BaseAddress, reason );
    if (!entry) return TRUE;

    if (TRACE_ON(relay))
    {
        size_t len = min( wm->ldr.BaseDllName.Length, sizeof(mod_name)-sizeof(WCHAR) );
        memcpy( mod_name, wm->ldr.BaseDllName.Buffer, len );
        mod_name[len / sizeof(WCHAR)] = 0;
        DPRINTF("%04lx:Call PE DLL (proc=%p,module=%p %s,reason=%s,res=%p)\n",
                GetCurrentThreadId(), entry, module, debugstr_w(mod_name),
                reason_names[reason], lpReserved );
    }
    else TRACE("(%p %s,%s,%p) - CALL\n", module, debugstr_w(wm->ldr.BaseDllName.Buffer),
               reason_names[reason], lpReserved );

    retv = entry( module, reason, lpReserved );

    /* The state of the module list may have changed due to the call
       to the dll. We cannot assume that this module has not been
       deleted.  */
    if (TRACE_ON(relay))
        DPRINTF("%04lx:Ret  PE DLL (proc=%p,module=%p %s,reason=%s,res=%p) retval=%x\n",
                GetCurrentThreadId(), entry, module, debugstr_w(mod_name),
                reason_names[reason], lpReserved, retv );
    else TRACE("(%p,%s,%p) - RETURN %d\n", module, reason_names[reason], lpReserved, retv );

    return retv;
}


/*************************************************************************
 *              process_attach
 *
 * Send the process attach notification to all DLLs the given module
 * depends on (recursively). This is somewhat complicated due to the fact that
 *
 * - we have to respect the module dependencies, i.e. modules implicitly
 *   referenced by another module have to be initialized before the module
 *   itself can be initialized
 *
 * - the initialization routine of a DLL can itself call LoadLibrary,
 *   thereby introducing a whole new set of dependencies (even involving
 *   the 'old' modules) at any time during the whole process
 *
 * (Note that this routine can be recursively entered not only directly
 *  from itself, but also via LoadLibrary from one of the called initialization
 *  routines.)
 *
 * Furthermore, we need to rearrange the main WINE_MODREF list to allow
 * the process *detach* notifications to be sent in the correct order.
 * This must not only take into account module dependencies, but also
 * 'hidden' dependencies created by modules calling LoadLibrary in their
 * attach notification routine.
 *
 * The strategy is rather simple: we move a WINE_MODREF to the head of the
 * list after the attach notification has returned.  This implies that the
 * detach notifications are called in the reverse of the sequence the attach
 * notifications *returned*.
 *
 * The loader_section must be locked while calling this function.
 */
static NTSTATUS process_attach( WINE_MODREF *wm, LPVOID lpReserved )
{
    NTSTATUS status = STATUS_SUCCESS;
    int i;

    /* prevent infinite recursion in case of cyclical dependencies */
    if (    ( wm->ldr.Flags & LDR_LOAD_IN_PROGRESS )
         || ( wm->ldr.Flags & LDR_PROCESS_ATTACHED ) )
        return status;

    TRACE("(%s,%p) - START\n", debugstr_w(wm->ldr.BaseDllName.Buffer), lpReserved );

    /* Tag current MODREF to prevent recursive loop */
    wm->ldr.Flags |= LDR_LOAD_IN_PROGRESS;

    /* Recursively attach all DLLs this one depends on */
    for ( i = 0; i < wm->nDeps; i++ )
    {
        if (!wm->deps[i]) continue;
        if ((status = process_attach( wm->deps[i], lpReserved )) != STATUS_SUCCESS) break;
    }

    /* Call DLL entry point */
    if (status == STATUS_SUCCESS)
    {
        WINE_MODREF *prev = current_modref;
        current_modref = wm;
        if (MODULE_InitDLL( wm, DLL_PROCESS_ATTACH, lpReserved ))
            wm->ldr.Flags |= LDR_PROCESS_ATTACHED;
        else
            status = STATUS_DLL_INIT_FAILED;
        current_modref = prev;
    }

    InsertTailList(&NtCurrentTeb()->Peb->LdrData->InInitializationOrderModuleList, 
                   &wm->ldr.InInitializationOrderModuleList);

    /* Remove recursion flag */
    wm->ldr.Flags &= ~LDR_LOAD_IN_PROGRESS;

    TRACE("(%s,%p) - END\n", debugstr_w(wm->ldr.BaseDllName.Buffer), lpReserved );
    return status;
}

/*************************************************************************
 *              process_detach
 *
 * Send DLL process detach notifications.  See the comment about calling
 * sequence at process_attach.  Unless the bForceDetach flag
 * is set, only DLLs with zero refcount are notified.
 */
static void process_detach( BOOL bForceDetach, LPVOID lpReserved )
{
    PLIST_ENTRY mark, entry;
    PLDR_MODULE mod;

    RtlEnterCriticalSection( &loader_section );
    if (bForceDetach) process_detaching = 1;
    mark = &NtCurrentTeb()->Peb->LdrData->InInitializationOrderModuleList;
    do
    {
        for (entry = mark->Blink; entry != mark; entry = entry->Blink)
        {
            mod = CONTAINING_RECORD(entry, LDR_MODULE, 
                                    InInitializationOrderModuleList);
            /* Check whether to detach this DLL */
            if ( !(mod->Flags & LDR_PROCESS_ATTACHED) )
                continue;
            if ( mod->LoadCount && !bForceDetach )
                continue;

            /* Call detach notification */
            mod->Flags &= ~LDR_PROCESS_ATTACHED;
            MODULE_InitDLL( CONTAINING_RECORD(mod, WINE_MODREF, ldr), 
                            DLL_PROCESS_DETACH, lpReserved );

            /* Restart at head of WINE_MODREF list, as entries might have
               been added and/or removed while performing the call ... */
            break;
        }
    } while (entry != mark);

    RtlLeaveCriticalSection( &loader_section );
}

/*************************************************************************
 *              MODULE_DllThreadAttach
 *
 * Send DLL thread attach notifications. These are sent in the
 * reverse sequence of process detach notification.
 *
 */
NTSTATUS MODULE_DllThreadAttach( LPVOID lpReserved )
{
    PLIST_ENTRY mark, entry;
    PLDR_MODULE mod;
    NTSTATUS    status;

    /* don't do any attach calls if process is exiting */
    if (process_detaching) return STATUS_SUCCESS;
    /* FIXME: there is still a race here */

    RtlEnterCriticalSection( &loader_section );

    if ((status = alloc_thread_tls()) != STATUS_SUCCESS) goto done;

    mark = &NtCurrentTeb()->Peb->LdrData->InInitializationOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        mod = CONTAINING_RECORD(entry, LDR_MODULE, 
                                InInitializationOrderModuleList);
        if ( !(mod->Flags & LDR_PROCESS_ATTACHED) )
            continue;
        if ( mod->Flags & LDR_NO_DLL_CALLS )
            continue;

        MODULE_InitDLL( CONTAINING_RECORD(mod, WINE_MODREF, ldr),
                        DLL_THREAD_ATTACH, lpReserved );
    }

done:
    RtlLeaveCriticalSection( &loader_section );
    return status;
}

/******************************************************************
 *              LdrDisableThreadCalloutsForDll (NTDLL.@)
 *
 */
NTSTATUS WINAPI LdrDisableThreadCalloutsForDll(HMODULE hModule)
{
    WINE_MODREF *wm;
    NTSTATUS    ret = STATUS_SUCCESS;

    RtlEnterCriticalSection( &loader_section );

    wm = get_modref( hModule );
    if (!wm || wm->ldr.TlsIndex != -1)
        ret = STATUS_DLL_NOT_FOUND;
    else
        wm->ldr.Flags |= LDR_NO_DLL_CALLS;

    RtlLeaveCriticalSection( &loader_section );

    return ret;
}

/******************************************************************
 *              LdrFindEntryForAddress (NTDLL.@)
 *
 * The loader_section must be locked while calling this function
 */
NTSTATUS WINAPI LdrFindEntryForAddress(const void* addr, PLDR_MODULE* pmod)
{
    PLIST_ENTRY mark, entry;
    PLDR_MODULE mod;

    mark = &NtCurrentTeb()->Peb->LdrData->InMemoryOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        mod = CONTAINING_RECORD(entry, LDR_MODULE, InMemoryOrderModuleList);
        if ((const void *)mod->BaseAddress <= addr &&
            (char *)addr < (char*)mod->BaseAddress + mod->SizeOfImage)
        {
            *pmod = mod;
            return STATUS_SUCCESS;
        }
        if ((const void *)mod->BaseAddress > addr) break;
    }
    return STATUS_NO_MORE_ENTRIES;
}

/******************************************************************
 *              LdrLockLoaderLock  (NTDLL.@)
 *
 * Note: flags are not implemented.
 * Flag 0x01 is used to raise exceptions on errors.
 * Flag 0x02 is used to avoid waiting on the section (does RtlTryEnterCriticalSection instead).
 */
NTSTATUS WINAPI LdrLockLoaderLock( ULONG flags, ULONG *result, ULONG *magic )
{
    if (flags) FIXME( "flags %lx not supported\n", flags );

    if (result) *result = 1;
    if (!magic) return STATUS_INVALID_PARAMETER_3;
    RtlEnterCriticalSection( &loader_section );
    *magic = GetCurrentThreadId();
    return STATUS_SUCCESS;
}


/******************************************************************
 *              LdrUnlockLoaderUnlock  (NTDLL.@)
 */
NTSTATUS WINAPI LdrUnlockLoaderLock( ULONG flags, ULONG magic )
{
    if (magic)
    {
        if (magic != GetCurrentThreadId()) return STATUS_INVALID_PARAMETER_2;
        RtlLeaveCriticalSection( &loader_section );
    }
    return STATUS_SUCCESS;
}


/******************************************************************
 *              LdrGetDllHandle (NTDLL.@)
 */
NTSTATUS WINAPI LdrGetDllHandle(ULONG x, ULONG y, const UNICODE_STRING *name, HMODULE *base)
{
    NTSTATUS status = STATUS_DLL_NOT_FOUND;
    WCHAR dllname[MAX_PATH+4], *p;
    UNICODE_STRING str;
    PLIST_ENTRY mark, entry;
    PLDR_MODULE mod;

    if (x != 0 || y != 0)
        FIXME("Unknown behavior, please report\n");

    /* Append .DLL to name if no extension present */
    if (!(p = strrchrW( name->Buffer, '.')) || strchrW( p, '/' ) || strchrW( p, '\\'))
    {
        if (name->Length >= MAX_PATH) return STATUS_NAME_TOO_LONG;
        strcpyW( dllname, name->Buffer );
        strcatW( dllname, dllW );
        RtlInitUnicodeString( &str, dllname );
        name = &str;
    }

    RtlEnterCriticalSection( &loader_section );

    if (cached_modref)
    {
        if (RtlEqualUnicodeString( name, &cached_modref->ldr.FullDllName, TRUE ) ||
            RtlEqualUnicodeString( name, &cached_modref->ldr.BaseDllName, TRUE ))
        {
            *base = cached_modref->ldr.BaseAddress;
            status = STATUS_SUCCESS;
            goto done;
        }
    }

    mark = &NtCurrentTeb()->Peb->LdrData->InLoadOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        mod = CONTAINING_RECORD(entry, LDR_MODULE, InLoadOrderModuleList);

        if (RtlEqualUnicodeString( name, &mod->FullDllName, TRUE ) ||
            RtlEqualUnicodeString( name, &mod->BaseDllName, TRUE ))
        {
            cached_modref = CONTAINING_RECORD(mod, WINE_MODREF, ldr);
            *base = mod->BaseAddress;
            status = STATUS_SUCCESS;
            break;
        }
    }
done:
    RtlLeaveCriticalSection( &loader_section );
    TRACE("%lx %lx %s -> %p\n", x, y, debugstr_us(name), status ? NULL : *base);
    return status;
}


/******************************************************************
 *              LdrGetProcedureAddress  (NTDLL.@)
 */
NTSTATUS WINAPI LdrGetProcedureAddress(HMODULE module, const ANSI_STRING *name,
                                       ULONG ord, PVOID *address)
{
    IMAGE_EXPORT_DIRECTORY *exports;
    DWORD exp_size;
    NTSTATUS ret = STATUS_PROCEDURE_NOT_FOUND;

    RtlEnterCriticalSection( &loader_section );

    if ((exports = RtlImageDirectoryEntryToData( module, TRUE,
                                                 IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
    {
        void *proc = name ? find_named_export( module, exports, exp_size, name->Buffer, -1 )
                          : find_ordinal_export( module, exports, exp_size, ord - exports->Base );
        if (proc)
        {
            *address = proc;
            ret = STATUS_SUCCESS;
        }
    }
    else
    {
        /* check if the module itself is invalid to return the proper error */
        if (!get_modref( module )) ret = STATUS_DLL_NOT_FOUND;
    }

    RtlLeaveCriticalSection( &loader_section );
    return ret;
}


/***********************************************************************
 *           load_builtin_callback
 *
 * Load a library in memory; callback function for wine_dll_register
 */
static void load_builtin_callback( void *module, const char *filename )
{
    static const WCHAR emptyW[1];
    void *addr;
    IMAGE_NT_HEADERS *nt;
    WINE_MODREF *wm;
    WCHAR *fullname, *p;
    const WCHAR *load_path;

    if (!module)
    {
        ERR("could not map image for %s\n", filename ? filename : "main exe" );
        return;
    }
    if (!(nt = RtlImageNtHeader( module )))
    {
        ERR( "bad module for %s\n", filename ? filename : "main exe" );
        builtin_load_info->status = STATUS_INVALID_IMAGE_FORMAT;
        return;
    }
    if (!(nt->FileHeader.Characteristics & IMAGE_FILE_DLL))
    {
        /* if we already have an executable, ignore this one */
        if (!NtCurrentTeb()->Peb->ImageBaseAddress)
        {
            NtCurrentTeb()->Peb->ImageBaseAddress = module;
            return; /* don't create the modref here, will be done later on */
        }
    }

    /* create the MODREF */

    if (!(fullname = RtlAllocateHeap( GetProcessHeap(), 0,
                                      system_dir.MaximumLength + (strlen(filename) + 1) * sizeof(WCHAR) )))
    {
        ERR( "can't load %s\n", filename );
        builtin_load_info->status = STATUS_NO_MEMORY;
        return;
    }
    memcpy( fullname, system_dir.Buffer, system_dir.Length );
    p = fullname + system_dir.Length / sizeof(WCHAR);
    if (p > fullname && p[-1] != '\\') *p++ = '\\';
    ascii_to_unicode( p, filename, strlen(filename) + 1 );

    wm = alloc_module( module, fullname );
    RtlFreeHeap( GetProcessHeap(), 0, fullname );
    if (!wm)
    {
        ERR( "can't load %s\n", filename );
        builtin_load_info->status = STATUS_NO_MEMORY;
        return;
    }
    wm->ldr.Flags |= LDR_WINE_INTERNAL;
    NtAllocateVirtualMemory( GetCurrentProcess(), &addr, module, &nt->OptionalHeader.SizeOfImage,
                             MEM_SYSTEM | MEM_IMAGE, PAGE_EXECUTE_WRITECOPY );

    /* fixup imports */

    load_path = builtin_load_info->load_path;
    if (!load_path) load_path = NtCurrentTeb()->Peb->ProcessParameters->DllPath.Buffer;
    if (!load_path) load_path = emptyW;
    if (fixup_imports( wm, load_path ) != STATUS_SUCCESS)
    {
        /* the module has only be inserted in the load & memory order lists */
        RemoveEntryList(&wm->ldr.InLoadOrderModuleList);
        RemoveEntryList(&wm->ldr.InMemoryOrderModuleList);
        /* FIXME: free the modref */
        builtin_load_info->status = STATUS_DLL_NOT_FOUND;
        return;
    }
    builtin_load_info->wm = wm;
    TRACE( "loaded %s %p %p\n", filename, wm, module );

    /* send the DLL load event */

    SERVER_START_REQ( load_dll )
    {
        req->handle     = 0;
        req->base       = module;
        req->size       = nt->OptionalHeader.SizeOfImage;
        req->dbg_offset = nt->FileHeader.PointerToSymbolTable;
        req->dbg_size   = nt->FileHeader.NumberOfSymbols;
        req->name       = &wm->ldr.FullDllName.Buffer;
        wine_server_add_data( req, wm->ldr.FullDllName.Buffer, wm->ldr.FullDllName.Length );
        wine_server_call( req );
    }
    SERVER_END_REQ;

    /* setup relay debugging entry points */
    if (TRACE_ON(relay)) RELAY_SetupDLL( module );
}


/******************************************************************************
 *      load_native_dll  (internal)
 */
static NTSTATUS load_native_dll( LPCWSTR load_path, LPCWSTR name, HANDLE file,
                                 DWORD flags, WINE_MODREF** pwm )
{
    void *module;
    HANDLE mapping;
    OBJECT_ATTRIBUTES attr;
    LARGE_INTEGER size;
    IMAGE_NT_HEADERS *nt;
    DWORD len = 0;
    WINE_MODREF *wm;
    NTSTATUS status;

    TRACE( "loading %s\n", debugstr_w(name) );

    attr.Length                   = sizeof(attr);
    attr.RootDirectory            = 0;
    attr.ObjectName               = NULL;
    attr.Attributes               = 0;
    attr.SecurityDescriptor       = NULL;
    attr.SecurityQualityOfService = NULL;
    size.QuadPart = 0;

    status = NtCreateSection( &mapping, STANDARD_RIGHTS_REQUIRED | SECTION_QUERY | SECTION_MAP_READ,
                              &attr, &size, 0, SEC_IMAGE, file );
    if (status != STATUS_SUCCESS) return status;

    module = NULL;
    status = NtMapViewOfSection( mapping, GetCurrentProcess(),
                                 &module, 0, 0, &size, &len, ViewShare, 0, PAGE_READONLY );
    NtClose( mapping );
    if (status != STATUS_SUCCESS) return status;

    /* create the MODREF */

    if (!(wm = alloc_module( module, name ))) return STATUS_NO_MEMORY;

    /* fixup imports */

    if (!(flags & DONT_RESOLVE_DLL_REFERENCES))
    {
        if ((status = fixup_imports( wm, load_path )) != STATUS_SUCCESS)
        {
            /* the module has only be inserted in the load & memory order lists */
            RemoveEntryList(&wm->ldr.InLoadOrderModuleList);
            RemoveEntryList(&wm->ldr.InMemoryOrderModuleList);

            /* FIXME: there are several more dangling references
             * left. Including dlls loaded by this dll before the
             * failed one. Unrolling is rather difficult with the
             * current structure and we can leave them lying
             * around with no problems, so we don't care.
             * As these might reference our wm, we don't free it.
             */
            return status;
        }
    }
    else wm->ldr.Flags |= LDR_DONT_RESOLVE_REFS;

    /* send DLL load event */

    nt = RtlImageNtHeader( module );

    SERVER_START_REQ( load_dll )
    {
        req->handle     = file;
        req->base       = module;
        req->size       = nt->OptionalHeader.SizeOfImage;
        req->dbg_offset = nt->FileHeader.PointerToSymbolTable;
        req->dbg_size   = nt->FileHeader.NumberOfSymbols;
        req->name       = &wm->ldr.FullDllName.Buffer;
        wine_server_add_data( req, wm->ldr.FullDllName.Buffer, wm->ldr.FullDllName.Length );
        wine_server_call( req );
    }
    SERVER_END_REQ;

    if (TRACE_ON(snoop)) SNOOP_SetupDLL( module );

    *pwm = wm;
    return STATUS_SUCCESS;
}


/***********************************************************************
 *           load_builtin_dll
 */
static NTSTATUS load_builtin_dll( LPCWSTR load_path, LPCWSTR path, DWORD flags, WINE_MODREF** pwm )
{
    char error[256], dllname[MAX_PATH];
    int file_exists;
    const WCHAR *name, *p;
    DWORD len, i;
    void *handle;
    struct builtin_load_info info, *prev_info;

    /* Fix the name in case we have a full path and extension */
    name = path;
    if ((p = strrchrW( name, '\\' ))) name = p + 1;
    if ((p = strrchrW( name, '/' ))) name = p + 1;

    /* we don't want to depend on the current codepage here */
    len = strlenW( name ) + 1;
    if (len >= sizeof(dllname)) return STATUS_NAME_TOO_LONG;
    for (i = 0; i < len; i++)
    {
        if (name[i] > 127) return STATUS_DLL_NOT_FOUND;
        dllname[i] = (char)name[i];
        if (dllname[i] >= 'A' && dllname[i] <= 'Z') dllname[i] += 'a' - 'A';
    }

    /* load_library will modify info.status. Note also that load_library can be
     * called several times, if the .so file we're loading has dependencies.
     * info.status will gather all the errors we may get while loading all these
     * libraries
     */
    info.load_path = load_path;
    info.status    = STATUS_SUCCESS;
    info.wm        = NULL;
    prev_info = builtin_load_info;
    builtin_load_info = &info;
    handle = wine_dll_load( dllname, error, sizeof(error), &file_exists );
    builtin_load_info = prev_info;

    if (!handle)
    {
        if (!file_exists)
        {
            /* The file does not exist -> WARN() */
            WARN("cannot open .so lib for builtin %s: %s\n", debugstr_w(name), error);
            return STATUS_DLL_NOT_FOUND;
        }
        /* ERR() for all other errors (missing functions, ...) */
        ERR("failed to load .so lib for builtin %s: %s\n", debugstr_w(name), error );
        return STATUS_PROCEDURE_NOT_FOUND;
    }
    if (info.status != STATUS_SUCCESS) return info.status;

    if (!info.wm)
    {
        /* The constructor wasn't called, this means the .so is already
         * loaded under a different name. We can't support multiple names
         * for the same module, so return an error. */
        return STATUS_INVALID_IMAGE_FORMAT;
    }

    info.wm->ldr.SectionHandle = handle;
    if (strcmpiW( info.wm->ldr.BaseDllName.Buffer, name ))
    {
        ERR( "loaded .so for %s but got %s instead - probably 16-bit dll\n",
             debugstr_w(name), debugstr_w(info.wm->ldr.BaseDllName.Buffer) );
        /* wine_dll_unload( handle );*/
        return STATUS_INVALID_IMAGE_FORMAT;
    }
    *pwm = info.wm;
    return STATUS_SUCCESS;
}


/***********************************************************************
 *      find_dll_file
 *
 * Find the file (or already loaded module) for a given dll name.
 */
static NTSTATUS find_dll_file( const WCHAR *load_path, const WCHAR *libname,
                               WCHAR *filename, ULONG *size, WINE_MODREF **pwm, HANDLE *handle )
{
    WCHAR *file_part, *ext;
    ULONG len;

    if (RtlDetermineDosPathNameType_U( libname ) == RELATIVE_PATH)
    {
        /* we need to search for it */
        /* but first append .dll because RtlDosSearchPath extension handling is broken */
        if (!(ext = strrchrW( libname, '.')) || strchrW( ext, '/' ) || strchrW( ext, '\\'))
        {
            WCHAR *dllname;

            if (!(dllname = RtlAllocateHeap( GetProcessHeap(), 0,
                                             (strlenW(libname) * sizeof(WCHAR)) + sizeof(dllW) )))
                return STATUS_NO_MEMORY;
            strcpyW( dllname, libname );
            strcatW( dllname, dllW );
            len = RtlDosSearchPath_U( load_path, dllname, NULL, *size, filename, &file_part );
            RtlFreeHeap( GetProcessHeap(), 0, dllname );
        }
        else len = RtlDosSearchPath_U( load_path, libname, NULL, *size, filename, &file_part );

        if (len)
        {
            if (len >= *size)
            {
                *size = len + sizeof(WCHAR);
                return STATUS_BUFFER_TOO_SMALL;
            }
            if ((*pwm = find_fullname_module( filename )) != NULL) return STATUS_SUCCESS;

            /* check for already loaded module in a different path */
            if (!contains_path( libname ))
            {
                if ((*pwm = find_basename_module( file_part )) != NULL) return STATUS_SUCCESS;
            }
            *handle = pCreateFileW( filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0 );
            return STATUS_SUCCESS;
        }

        /* not found */

        if (!contains_path( libname ))
        {
            /* if libname doesn't contain a path at all, we simply return the name as is,
             * to be loaded as builtin */
            len = strlenW(libname) * sizeof(WCHAR);
            if (len >= *size) goto overflow;
            strcpyW( filename, libname );
            if (!strchrW( filename, '.' ))
            {
                len += sizeof(dllW) - sizeof(WCHAR);
                if (len >= *size) goto overflow;
                strcatW( filename, dllW );
            }
            *pwm = find_basename_module( filename );
            return STATUS_SUCCESS;
        }
    }

    /* absolute path name, or relative path name but not found above */

    len = RtlGetFullPathName_U( libname, *size, filename, &file_part );
    if (len >= *size) goto overflow;
    if (file_part && !strchrW( file_part, '.' ))
    {
        len += sizeof(dllW) - sizeof(WCHAR);
        if (len >= *size) goto overflow;
        strcatW( file_part, dllW );
    }
    if ((*pwm = find_fullname_module( filename )) != NULL) return STATUS_SUCCESS;
    *handle = pCreateFileW( filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0 );
    return STATUS_SUCCESS;

overflow:
    *size = len + sizeof(WCHAR);
    return STATUS_BUFFER_TOO_SMALL;
}


/***********************************************************************
 *      load_dll  (internal)
 *
 * Load a PE style module according to the load order.
 * The loader_section must be locked while calling this function.
 */
static NTSTATUS load_dll( LPCWSTR load_path, LPCWSTR libname, DWORD flags, WINE_MODREF** pwm )
{
    int i;
    enum loadorder_type loadorder[LOADORDER_NTYPES];
    WCHAR buffer[32];
    WCHAR *filename;
    ULONG size;
    const char *filetype = "";
    WINE_MODREF *main_exe;
    HANDLE handle = INVALID_HANDLE_VALUE;
    NTSTATUS nts;

    TRACE( "looking for %s in %s\n", debugstr_w(libname), debugstr_w(load_path) );

    filename = buffer;
    size = sizeof(buffer);
    for (;;)
    {
        nts = find_dll_file( load_path, libname, filename, &size, pwm, &handle );
        if (nts == STATUS_SUCCESS) break;
        if (filename != buffer) RtlFreeHeap( GetProcessHeap(), 0, filename );
        if (nts != STATUS_BUFFER_TOO_SMALL) return nts;
        /* grow the buffer and retry */
        if (!(filename = RtlAllocateHeap( GetProcessHeap(), 0, size ))) return STATUS_NO_MEMORY;
    }

    if (*pwm)  /* found already loaded module */
    {
        if ((*pwm)->ldr.LoadCount != -1) (*pwm)->ldr.LoadCount++;

        if (((*pwm)->ldr.Flags & LDR_DONT_RESOLVE_REFS) &&
            !(flags & DONT_RESOLVE_DLL_REFERENCES))
        {
            (*pwm)->ldr.Flags &= ~LDR_DONT_RESOLVE_REFS;
            fixup_imports( *pwm, load_path );
        }
        TRACE("Found loaded module %s for %s at %p, count=%d\n",
              debugstr_w((*pwm)->ldr.FullDllName.Buffer), debugstr_w(libname),
              (*pwm)->ldr.BaseAddress, (*pwm)->ldr.LoadCount);
        if (filename != buffer) RtlFreeHeap( GetProcessHeap(), 0, filename );
        return STATUS_SUCCESS;
    }

    main_exe = get_modref( NtCurrentTeb()->Peb->ImageBaseAddress );
    MODULE_GetLoadOrderW( loadorder, main_exe ? main_exe->ldr.BaseDllName.Buffer : NULL, filename );

    nts = STATUS_DLL_NOT_FOUND;
    for (i = 0; i < LOADORDER_NTYPES; i++)
    {
        if (loadorder[i] == LOADORDER_INVALID) break;

        switch (loadorder[i])
        {
        case LOADORDER_DLL:
            TRACE("Trying native dll %s\n", debugstr_w(filename));
            if (handle == INVALID_HANDLE_VALUE) continue;  /* it cannot possibly be loaded */
            nts = load_native_dll( load_path, filename, handle, flags, pwm );
            filetype = "native";
            break;
        case LOADORDER_BI:
            TRACE("Trying built-in %s\n", debugstr_w(filename));
            nts = load_builtin_dll( load_path, filename, flags, pwm );
            filetype = "builtin";
            break;
        default:
            nts = STATUS_INTERNAL_ERROR;
            break;
        }

        if (nts == STATUS_SUCCESS)
        {
            /* Initialize DLL just loaded */
            TRACE("Loaded module %s (%s) at %p\n",
                  debugstr_w(filename), filetype, (*pwm)->ldr.BaseAddress);
            if (!TRACE_ON(module))
                TRACE_(loaddll)("Loaded module %s : %s\n", debugstr_w(filename), filetype);
            /* Set the ldr.LoadCount here so that an attach failure will */
            /* decrement the dependencies through the MODULE_FreeLibrary call. */
            (*pwm)->ldr.LoadCount = 1;
            if (handle != INVALID_HANDLE_VALUE) NtClose( handle );
            if (filename != buffer) RtlFreeHeap( GetProcessHeap(), 0, filename );
            return nts;
        }
        if (nts != STATUS_DLL_NOT_FOUND) break;
    }

    WARN("Failed to load module %s; status=%lx\n", debugstr_w(libname), nts);
    if (handle != INVALID_HANDLE_VALUE) NtClose( handle );
    if (filename != buffer) RtlFreeHeap( GetProcessHeap(), 0, filename );
    return nts;
}

/******************************************************************
 *              LdrLoadDll (NTDLL.@)
 */
NTSTATUS WINAPI LdrLoadDll(LPCWSTR path_name, DWORD flags,
                           const UNICODE_STRING *libname, HMODULE* hModule)
{
    WINE_MODREF *wm;
    NTSTATUS nts;

    RtlEnterCriticalSection( &loader_section );

    if (!path_name) path_name = NtCurrentTeb()->Peb->ProcessParameters->DllPath.Buffer;
    nts = load_dll( path_name, libname->Buffer, flags, &wm );

    if (nts == STATUS_SUCCESS && !(wm->ldr.Flags & LDR_DONT_RESOLVE_REFS))
    {
        nts = process_attach( wm, NULL );
        if (nts != STATUS_SUCCESS)
        {
            WARN("Attach failed for module %s\n", debugstr_w(libname->Buffer));
            LdrUnloadDll(wm->ldr.BaseAddress);
            wm = NULL;
        }
    }
    *hModule = (wm) ? wm->ldr.BaseAddress : NULL;

    RtlLeaveCriticalSection( &loader_section );
    return nts;
}

/******************************************************************
 *              LdrQueryProcessModuleInformation
 *
 */
NTSTATUS WINAPI LdrQueryProcessModuleInformation(PSYSTEM_MODULE_INFORMATION smi, 
                                                 ULONG buf_size, ULONG* req_size)
{
    SYSTEM_MODULE*      sm = &smi->Modules[0];
    ULONG               size = sizeof(ULONG);
    NTSTATUS            nts = STATUS_SUCCESS;
    ANSI_STRING         str;
    char*               ptr;
    PLIST_ENTRY         mark, entry;
    PLDR_MODULE         mod;

    smi->ModulesCount = 0;

    RtlEnterCriticalSection( &loader_section );
    mark = &NtCurrentTeb()->Peb->LdrData->InLoadOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        mod = CONTAINING_RECORD(entry, LDR_MODULE, InLoadOrderModuleList);
        size += sizeof(*sm);
        if (size <= buf_size)
        {
            sm->Reserved1 = 0; /* FIXME */
            sm->Reserved2 = 0; /* FIXME */
            sm->ImageBaseAddress = mod->BaseAddress;
            sm->ImageSize = mod->SizeOfImage;
            sm->Flags = mod->Flags;
            sm->Id = 0; /* FIXME */
            sm->Rank = 0; /* FIXME */
            sm->Unknown = 0; /* FIXME */
            str.Length = 0;
            str.MaximumLength = MAXIMUM_FILENAME_LENGTH;
            str.Buffer = sm->Name;
            RtlUnicodeStringToAnsiString(&str, &mod->FullDllName, FALSE);
            ptr = strrchr(sm->Name, '\\');
            sm->NameOffset = (ptr != NULL) ? (ptr - (char*)sm->Name + 1) : 0;

            smi->ModulesCount++;
            sm++;
        }
        else nts = STATUS_INFO_LENGTH_MISMATCH;
    }
    RtlLeaveCriticalSection( &loader_section );

    if (req_size) *req_size = size;

    return nts;
}

/******************************************************************
 *              LdrShutdownProcess (NTDLL.@)
 *
 */
void WINAPI LdrShutdownProcess(void)
{
    TRACE("()\n");
    process_detach( TRUE, (LPVOID)1 );
}

/******************************************************************
 *              LdrShutdownThread (NTDLL.@)
 *
 */
void WINAPI LdrShutdownThread(void)
{
    PLIST_ENTRY mark, entry;
    PLDR_MODULE mod;

    TRACE("()\n");

    /* don't do any detach calls if process is exiting */
    if (process_detaching) return;
    /* FIXME: there is still a race here */

    RtlEnterCriticalSection( &loader_section );

    mark = &NtCurrentTeb()->Peb->LdrData->InInitializationOrderModuleList;
    for (entry = mark->Blink; entry != mark; entry = entry->Blink)
    {
        mod = CONTAINING_RECORD(entry, LDR_MODULE, 
                                InInitializationOrderModuleList);
        if ( !(mod->Flags & LDR_PROCESS_ATTACHED) )
            continue;
        if ( mod->Flags & LDR_NO_DLL_CALLS )
            continue;

        MODULE_InitDLL( CONTAINING_RECORD(mod, WINE_MODREF, ldr), 
                        DLL_THREAD_DETACH, NULL );
    }

    RtlLeaveCriticalSection( &loader_section );
}

/***********************************************************************
 *           MODULE_FlushModrefs
 *
 * Remove all unused modrefs and call the internal unloading routines
 * for the library type.
 *
 * The loader_section must be locked while calling this function.
 */
static void MODULE_FlushModrefs(void)
{
    PLIST_ENTRY mark, entry, prev;
    PLDR_MODULE mod;
    WINE_MODREF*wm;

    mark = &NtCurrentTeb()->Peb->LdrData->InInitializationOrderModuleList;
    for (entry = mark->Blink; entry != mark; entry = prev)
    {
        mod = CONTAINING_RECORD(entry, LDR_MODULE, 
                                InInitializationOrderModuleList);
        wm = CONTAINING_RECORD(mod, WINE_MODREF, ldr);

        prev = entry->Blink;
        if (mod->LoadCount) continue;

        RemoveEntryList(&mod->InLoadOrderModuleList);
        RemoveEntryList(&mod->InMemoryOrderModuleList);
        RemoveEntryList(&mod->InInitializationOrderModuleList);

        TRACE(" unloading %s\n", debugstr_w(mod->FullDllName.Buffer));
        if (!TRACE_ON(module))
            TRACE_(loaddll)("Unloaded module %s : %s\n",
                            debugstr_w(mod->FullDllName.Buffer),
                            (wm->ldr.Flags & LDR_WINE_INTERNAL) ? "builtin" : "native" );

        SERVER_START_REQ( unload_dll )
        {
            req->base = mod->BaseAddress;
            wine_server_call( req );
        }
        SERVER_END_REQ;

        if (wm->ldr.Flags & LDR_WINE_INTERNAL) wine_dll_unload( wm->ldr.SectionHandle );
        NtUnmapViewOfSection( GetCurrentProcess(), mod->BaseAddress );
        if (cached_modref == wm) cached_modref = NULL;
        RtlFreeUnicodeString( &mod->FullDllName );
        RtlFreeHeap( ntdll_get_process_heap(), 0, wm->deps );
        RtlFreeHeap( ntdll_get_process_heap(), 0, wm );
    }
}

/***********************************************************************
 *           MODULE_DecRefCount
 *
 * The loader_section must be locked while calling this function.
 */
static void MODULE_DecRefCount( WINE_MODREF *wm )
{
    int i;

    if ( wm->ldr.Flags & LDR_UNLOAD_IN_PROGRESS )
        return;

    if ( wm->ldr.LoadCount <= 0 )
        return;

    --wm->ldr.LoadCount;
    TRACE("(%s) ldr.LoadCount: %d\n", debugstr_w(wm->ldr.BaseDllName.Buffer), wm->ldr.LoadCount );

    if ( wm->ldr.LoadCount == 0 )
    {
        wm->ldr.Flags |= LDR_UNLOAD_IN_PROGRESS;

        for ( i = 0; i < wm->nDeps; i++ )
            if ( wm->deps[i] )
                MODULE_DecRefCount( wm->deps[i] );

        wm->ldr.Flags &= ~LDR_UNLOAD_IN_PROGRESS;
    }
}

/******************************************************************
 *              LdrUnloadDll (NTDLL.@)
 *
 *
 */
NTSTATUS WINAPI LdrUnloadDll( HMODULE hModule )
{
    NTSTATUS retv = STATUS_SUCCESS;

    TRACE("(%p)\n", hModule);

    RtlEnterCriticalSection( &loader_section );

    /* if we're stopping the whole process (and forcing the removal of all
     * DLLs) the library will be freed anyway
     */
    if (!process_detaching)
    {
        WINE_MODREF *wm;

        free_lib_count++;
        if ((wm = get_modref( hModule )) != NULL)
        {
            TRACE("(%s) - START\n", debugstr_w(wm->ldr.BaseDllName.Buffer));

            /* Recursively decrement reference counts */
            MODULE_DecRefCount( wm );

            /* Call process detach notifications */
            if ( free_lib_count <= 1 )
            {
                process_detach( FALSE, NULL );
                MODULE_FlushModrefs();
            }

            TRACE("END\n");
        }
        else
            retv = STATUS_DLL_NOT_FOUND;

        free_lib_count--;
    }

    RtlLeaveCriticalSection( &loader_section );

    return retv;
}

/***********************************************************************
 *           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;
}


/******************************************************************
 *              init_system_dir
 *
 * System dir initialization once kernel32 has been loaded.
 */
static inline void init_system_dir(void)
{
    PLIST_ENTRY mark, entry;
    LPWSTR buffer, p;

    if (!MODULE_GetSystemDirectory( &system_dir ))
    {
        ERR( "Couldn't get system dir\n");
        exit(1);
    }

    /* prepend the system dir to the name of the already created modules */
    mark = &NtCurrentTeb()->Peb->LdrData->InLoadOrderModuleList;
    for (entry = mark->Flink; entry != mark; entry = entry->Flink)
    {
        LDR_MODULE *mod = CONTAINING_RECORD( entry, LDR_MODULE, InLoadOrderModuleList );

        assert( mod->Flags & LDR_WINE_INTERNAL );

        buffer = RtlAllocateHeap( GetProcessHeap(), 0,
                                  system_dir.Length + mod->FullDllName.Length + 2*sizeof(WCHAR) );
        if (!buffer) continue;
        strcpyW( buffer, system_dir.Buffer );
        p = buffer + strlenW( buffer );
        if (p > buffer && p[-1] != '\\') *p++ = '\\';
        strcpyW( p, mod->FullDllName.Buffer );
        RtlInitUnicodeString( &mod->FullDllName, buffer );
        RtlInitUnicodeString( &mod->BaseDllName, p );
    }
}


/******************************************************************
 *              LdrInitializeThunk (NTDLL.@)
 *
 * FIXME: the arguments are not correct, main_file is a Wine invention.
 */
void WINAPI LdrInitializeThunk( HANDLE main_file, ULONG unknown2, ULONG unknown3, ULONG unknown4 )
{
    NTSTATUS status;
    WINE_MODREF *wm;
    LPCWSTR load_path;
    PEB *peb = NtCurrentTeb()->Peb;
    UNICODE_STRING *main_exe_name = &peb->ProcessParameters->ImagePathName;
    IMAGE_NT_HEADERS *nt = RtlImageNtHeader( peb->ImageBaseAddress );

    init_system_dir();

    /* allocate the modref for the main exe */
    if (!(wm = alloc_module( peb->ImageBaseAddress, main_exe_name->Buffer )))
    {
        status = STATUS_NO_MEMORY;
        goto error;
    }
    wm->ldr.LoadCount = -1;  /* can't unload main exe */

    /* the main exe needs to be the first in the load order list */
    RemoveEntryList( &wm->ldr.InLoadOrderModuleList );
    InsertHeadList( &peb->LdrData->InLoadOrderModuleList, &wm->ldr.InLoadOrderModuleList );

    /* Install signal handlers; this cannot be done before, since we cannot
     * send exceptions to the debugger before the create process event that
     * is sent by REQ_INIT_PROCESS_DONE.
     * We do need the handlers in place by the time the request is over, so
     * we set them up here. If we segfault between here and the server call
     * something is very wrong... */
    if (!SIGNAL_Init()) exit(1);

    /* Signal the parent process to continue */
    SERVER_START_REQ( init_process_done )
    {
        req->module      = peb->ImageBaseAddress;
        req->module_size = wm->ldr.SizeOfImage;
        req->entry       = (char *)peb->ImageBaseAddress + nt->OptionalHeader.AddressOfEntryPoint;
        /* API requires a double indirection */
        req->name        = &main_exe_name->Buffer;
        req->exe_file    = main_file;
        req->gui         = (nt->OptionalHeader.Subsystem != IMAGE_SUBSYSTEM_WINDOWS_CUI);
        wine_server_add_data( req, main_exe_name->Buffer, main_exe_name->Length );
        wine_server_call( req );
    }
    SERVER_END_REQ;

    if (main_file) NtClose( main_file ); /* we no longer need it */

    if (TRACE_ON(relay) || TRACE_ON(snoop))
    {
        RELAY_InitDebugLists();

        if (TRACE_ON(relay))  /* setup relay for already loaded dlls */
        {
            LIST_ENTRY *entry, *mark = &peb->LdrData->InLoadOrderModuleList;
            for (entry = mark->Flink; entry != mark; entry = entry->Flink)
            {
                LDR_MODULE *mod = CONTAINING_RECORD(entry, LDR_MODULE, InLoadOrderModuleList);
                if (mod->Flags & LDR_WINE_INTERNAL) RELAY_SetupDLL( mod->BaseAddress );
            }
        }
    }

    RtlEnterCriticalSection( &loader_section );

    load_path = NtCurrentTeb()->Peb->ProcessParameters->DllPath.Buffer;
    if ((status = fixup_imports( wm, load_path )) != STATUS_SUCCESS) goto error;
    if ((status = alloc_process_tls()) != STATUS_SUCCESS) goto error;
    if ((status = alloc_thread_tls()) != STATUS_SUCCESS) goto error;
    if ((status = process_attach( wm, (LPVOID)1 )) != STATUS_SUCCESS) goto error;

    RtlLeaveCriticalSection( &loader_section );
    return;

error:
    ERR( "Main exe initialization for %s failed, status %lx\n", debugstr_w(main_exe_name->Buffer), status );
    exit(1);
}


/***********************************************************************
 *           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);
}


/***********************************************************************
 *           __wine_process_init
 */
void __wine_process_init( int argc, char *argv[] )
{
    static const WCHAR kernel32W[] = {'k','e','r','n','e','l','3','2','.','d','l','l',0};

    WINE_MODREF *wm;
    NTSTATUS status;
    ANSI_STRING func_name;
    void (* DECLSPEC_NORETURN init_func)();
    extern void __wine_dbg_ntdll_init(void);

    thread_init();
    __wine_dbg_ntdll_init();  /* hack: register debug channels early */

    /* setup the load callback and create ntdll modref */
    wine_dll_set_callback( load_builtin_callback );

    if ((status = load_builtin_dll( NULL, kernel32W, 0, &wm )) != STATUS_SUCCESS)
    {
        MESSAGE( "wine: could not load kernel32.dll, status %lx\n", status );
        exit(1);
    }
    RtlInitAnsiString( &func_name, "__wine_kernel_init" );
    if ((status = LdrGetProcedureAddress( wm->ldr.BaseAddress, &func_name,
                                          0, (void **)&init_func )) != STATUS_SUCCESS)
    {
        MESSAGE( "wine: could not find __wine_kernel_init in kernel32.dll, status %lx\n", status );
        exit(1);
    }
    RtlInitAnsiString( &func_name, "CreateFileW" );
    if ((status = LdrGetProcedureAddress( wm->ldr.BaseAddress, &func_name,
                                          0, (void **)&pCreateFileW )) != STATUS_SUCCESS)
    {
        MESSAGE( "wine: could not find CreateFileW in kernel32.dll, status %lx\n", status );
        exit(1);
    }
    init_func();
}