module.c

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/*
 * Modules
 *
 * Copyright 1995 Alexandre Julliard
 *
 * Modified for use with MPlayer, detailed changelog at
 * http://svn.mplayerhq.hu/mplayer/trunk/
 * $Id: module.c,v 1.2 2008/03/03 08:11:38 dsqiu Exp $
 *
 */

// define for quicktime calls debugging and/or MacOS-level emulation:
#ifndef __APPLE__
#define EMU_QTX_API
#endif /* __APPLE__ */

// define for quicktime debugging (verbose logging):
//#define DEBUG_QTX_API

#include "config.h"
#include "debug.h"

#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <mplaylib.h>
#include <mplaylib.h>
#include <mplaylib.h>
#include <mplaylib.h>
#include <sys/mman.h>
#include <inttypes.h>

#include "wine/windef.h"
#include "wine/winerror.h"
#include "wine/heap.h"
#include "wine/module.h"
#include "wine/pe_image.h"
#include "wine/debugtools.h"

#undef HAVE_LIBDL

#ifdef HAVE_LIBDL
#include <dlfcn.h>
#include "wine/elfdll.h"
#endif
#include "win32.h"
#include "driver.h"

#ifdef EMU_QTX_API
#include "wrapper.h"
static int report_func(void *stack_base, int stack_size, reg386_t *reg, uint32_t *flags);
static int report_func_ret(void *stack_base, int stack_size, reg386_t *reg, uint32_t *flags);
#endif

//#undef TRACE
//#define TRACE printf

//WINE_MODREF *local_wm=NULL;
modref_list* local_wm=NULL;

HANDLE SegptrHeap;

WINE_MODREF* MODULE_FindModule(LPCSTR m)
{
    modref_list* list=local_wm;
    TRACE("FindModule: Module %s request\n", m);
    if(list==NULL)
	return NULL;
//    while(strcmp(m, list->wm->filename))
    while(!strstr(list->wm->filename, m))
    {
	TRACE("%s: %x\n", list->wm->filename, list->wm->module);
	list=list->prev;
	if(list==NULL)
	    return NULL;
    }
    TRACE("Resolved to %s\n", list->wm->filename);
    return list->wm;
}

static void MODULE_RemoveFromList(WINE_MODREF *mod)
{
    modref_list* list=local_wm;
    if(list==0)
	return;
    if(mod==0)
	return;
    if((list->prev==NULL)&&(list->next==NULL))
    {
	free(list);
	local_wm=NULL;
//	uninstall_fs();
	return;
    }
    for(;list;list=list->prev)
    {
	if(list->wm==mod)
	{
	    if(list->prev)
		list->prev->next=list->next;
	    if(list->next)
		list->next->prev=list->prev;
	    if(list==local_wm)
		local_wm=list->prev;
	    free(list);
	    return;
	}
    }

}

WINE_MODREF *MODULE32_LookupHMODULE(HMODULE m)
{
    modref_list* list=local_wm;
    TRACE("LookupHMODULE: Module %X request\n", m);
    if(list==NULL)
    {
	TRACE("LookupHMODULE failed\n");
	return NULL;
    }
    while(m!=list->wm->module)
    {
//      printf("Checking list %X wm %X module %X\n",
//	list, list->wm, list->wm->module);
	list=list->prev;
	if(list==NULL)
	{
	    TRACE("LookupHMODULE failed\n");
	    return NULL;
	}
    }
    TRACE("LookupHMODULE hit %p\n", list->wm);
    return list->wm;
}

/*************************************************************************
 *		MODULE_InitDll
 */
static WIN_BOOL MODULE_InitDll( WINE_MODREF *wm, DWORD type, LPVOID lpReserved )
{
    WIN_BOOL retv = TRUE;

    static LPCSTR typeName[] = { "PROCESS_DETACH", "PROCESS_ATTACH",
                                 "THREAD_ATTACH", "THREAD_DETACH" };
    assert( wm );


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

    if (    ( wm->flags & WINE_MODREF_DONT_RESOLVE_REFS )
         || ( wm->flags & WINE_MODREF_LOAD_AS_DATAFILE ) )
        return TRUE;


    TRACE("(%s,%s,%p) - CALL\n", wm->modname, typeName[type], lpReserved );

    /* Call the initialization routine */
    switch ( wm->type )
    {
    case MODULE32_PE:
        retv = PE_InitDLL( wm, type, lpReserved );
        break;

    case MODULE32_ELF:
        /* no need to do that, dlopen() already does */
        break;

    default:
        ERR("wine_modref type %d not handled.\n", wm->type );
        retv = FALSE;
        break;
    }

    /* The state of the module list may have changed due to the call
       to PE_InitDLL. We cannot assume that this module has not been
       deleted.  */
    TRACE("(%p,%s,%p) - RETURN %d\n", wm, typeName[type], lpReserved, retv );

    return retv;
}

/*************************************************************************
 *		MODULE_DllProcessAttach
 *
 * 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*.
 *
 * NOTE: Assumes that the process critical section is held!
 *
 */
static WIN_BOOL MODULE_DllProcessAttach( WINE_MODREF *wm, LPVOID lpReserved )
{
    WIN_BOOL retv = TRUE;
    //int i;
    assert( wm );

    /* prevent infinite recursion in case of cyclical dependencies */
    if (    ( wm->flags & WINE_MODREF_MARKER )
         || ( wm->flags & WINE_MODREF_PROCESS_ATTACHED ) )
        return retv;

    TRACE("(%s,%p) - START\n", wm->modname, lpReserved );

    /* Tag current MODREF to prevent recursive loop */
    wm->flags |= WINE_MODREF_MARKER;

    /* Recursively attach all DLLs this one depends on */
/*    for ( i = 0; retv && i < wm->nDeps; i++ )
        if ( wm->deps[i] )
            retv = MODULE_DllProcessAttach( wm->deps[i], lpReserved );
*/
    /* Call DLL entry point */

    //local_wm=wm;
    if(local_wm)
    {
	local_wm->next = (modref_list*) malloc(sizeof(modref_list));
        local_wm->next->prev=local_wm;
        local_wm->next->next=NULL;
        local_wm->next->wm=wm;
        local_wm=local_wm->next;
    }
    else
    {
	local_wm = malloc(sizeof(modref_list));
	local_wm->next=local_wm->prev=NULL;
	local_wm->wm=wm;
    }
    /* Remove recursion flag */
    wm->flags &= ~WINE_MODREF_MARKER;

    if ( retv )
    {
        retv = MODULE_InitDll( wm, DLL_PROCESS_ATTACH, lpReserved );
        if ( retv )
            wm->flags |= WINE_MODREF_PROCESS_ATTACHED;
    }


    TRACE("(%s,%p) - END\n", wm->modname, lpReserved );

    return retv;
}

/*************************************************************************
 *		MODULE_DllProcessDetach
 *
 * Send DLL process detach notifications.  See the comment about calling
 * sequence at MODULE_DllProcessAttach.  Unless the bForceDetach flag
 * is set, only DLLs with zero refcount are notified.
 */
static void MODULE_DllProcessDetach( WINE_MODREF* wm, WIN_BOOL bForceDetach, LPVOID lpReserved )
{
    //    WINE_MODREF *wm=local_wm;
    //modref_list* l = local_wm;
    wm->flags &= ~WINE_MODREF_PROCESS_ATTACHED;
    MODULE_InitDll( wm, DLL_PROCESS_DETACH, lpReserved );
/*    while (l)
    {
	modref_list* f = l;
	l = l->next;
	free(f);
    }
    local_wm = 0;*/
}

/***********************************************************************
 *	MODULE_LoadLibraryExA	(internal)
 *
 * Load a PE style module according to the load order.
 *
 * The HFILE parameter is not used and marked reserved in the SDK. I can
 * only guess that it should force a file to be mapped, but I rather
 * ignore the parameter because it would be extremely difficult to
 * integrate this with different types of module represenations.
 *
 */
static WINE_MODREF *MODULE_LoadLibraryExA( LPCSTR libname, HFILE hfile, DWORD flags )
{
	DWORD err = GetLastError();
	WINE_MODREF *pwm;
//	module_loadorder_t *plo;

        SetLastError( ERROR_FILE_NOT_FOUND );
	TRACE("Trying native dll '%s'\n", libname);
	pwm = PE_LoadLibraryExA(libname, flags);
#ifdef HAVE_LIBDL
	if(!pwm)
	{
    	    TRACE("Trying ELF dll '%s'\n", libname);
	    pwm=(WINE_MODREF*)ELFDLL_LoadLibraryExA(libname, flags);
	}
#endif
//		printf("0x%08x\n", pwm);
//		break;
	if(pwm)
	{
		/* Initialize DLL just loaded */
		TRACE("Loaded module '%s' at 0x%08x, \n", libname, pwm->module);
		/* Set the refCount here so that an attach failure will */
		/* decrement the dependencies through the MODULE_FreeLibrary call. */
		pwm->refCount++;

                SetLastError( err );  /* restore last error */
		return pwm;
	}


	WARN("Failed to load module '%s'; error=0x%08lx, \n", libname, GetLastError());
	return NULL;
}

/***********************************************************************
 *           MODULE_FreeLibrary
 *
 * NOTE: Assumes that the process critical section is held!
 */
static WIN_BOOL MODULE_FreeLibrary( WINE_MODREF *wm )
{
    TRACE("(%s) - START\n", wm->modname );

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

    /* Call process detach notifications */
    MODULE_DllProcessDetach( wm, FALSE, NULL );

    PE_UnloadLibrary(wm);

    TRACE("END\n");

    return TRUE;
}

/***********************************************************************
 *           LoadLibraryExA   (KERNEL32)
 */
HMODULE WINAPI LoadLibraryExA(LPCSTR libname, HANDLE hfile, DWORD flags)
{
	WINE_MODREF *wm = 0;
	char* listpath[] = { "", "", "/usr/lib/win32", "/usr/local/lib/win32", 0 };
	extern char* def_path;
	char path[512];