pe_image.c

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/* 
 *  Copyright	1994	Eric Youndale & Erik Bos
 *  Copyright	1995	Martin von Löwis
 *  Copyright   1996-98 Marcus Meissner
 *
 *	based on Eric Youndale's pe-test and:
 *
 *	ftp.microsoft.com:/pub/developer/MSDN/CD8/PEFILE.ZIP
 * make that:
 *	ftp.microsoft.com:/developr/MSDN/OctCD/PEFILE.ZIP
 *
 * Modified for use with MPlayer, detailed changelog at
 * http://svn.mplayerhq.hu/mplayer/trunk/
 * $Id: pe_image.c,v 1.3 2008/04/12 07:14:45 dsqiu Exp $
 *
 */
/* Notes:
 * Before you start changing something in this file be aware of the following:
 *
 * - There are several functions called recursively. In a very subtle and 
 *   obscure way. DLLs can reference each other recursively etc.
 * - If you want to enhance, speed up or clean up something in here, think
 *   twice WHY it is implemented in that strange way. There is usually a reason.
 *   Though sometimes it might just be lazyness ;)
 * - In PE_MapImage, right before fixup_imports() all external and internal 
 *   state MUST be correct since this function can be called with the SAME image
 *   AGAIN. (Thats recursion for you.) That means MODREF.module and
 *   NE_MODULE.module32.
 * - Sometimes, we can't use Linux mmap() to mmap() the images directly.
 *
 *   The problem is, that there is not direct 1:1 mapping from a diskimage and
 *   a memoryimage. The headers at the start are mapped linear, but the sections
 *   are not. Older x86 pe binaries are 512 byte aligned in file and 4096 byte
 *   aligned in memory. Linux likes them 4096 byte aligned in memory (due to
 *   x86 pagesize, this cannot be fixed without a rather large kernel rewrite)
 *   and 'blocksize' file-aligned (offsets). Since we have 512/1024/2048 (CDROM)
 *   and other byte blocksizes, we can't always do this.  We *can* do this for
 *   newer pe binaries produced by MSVC 5 and later, since they are also aligned
 *   to 4096 byte boundaries on disk.
 */
#include "config.h"
#include "debug.h"

#include <errno.h>
#include <assert.h>
#include <mplaylib.h>
#include <mplaylib.h>
#include <mplaylib.h>
#include <mplaylib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#include "wine/windef.h"
#include "wine/winbase.h"
#include "wine/winerror.h"
#include "wine/heap.h"
#include "wine/pe_image.h"
#include "wine/module.h"
#include "wine/debugtools.h"
#include "ext.h"
#include "win32.h"
#undef memcpy
#define memcpy uc_memcpy
#define RVA(x) ((void *)((char *)load_addr+(unsigned int)(x)))

#define AdjustPtr(ptr,delta) ((char *)(ptr) + (delta))

static void dump_exports( HMODULE hModule )
{ 
  char		*Module;
  unsigned int i, j;
  u_short	*ordinal;
  u_long	*function,*functions;
  u_char	**name;
  unsigned int load_addr = hModule;

  DWORD rva_start = PE_HEADER(hModule)->OptionalHeader
                   .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
  DWORD rva_end = rva_start + PE_HEADER(hModule)->OptionalHeader
                   .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
  IMAGE_EXPORT_DIRECTORY *pe_exports = (IMAGE_EXPORT_DIRECTORY*)RVA(rva_start);

  Module = (char*)RVA(pe_exports->Name);
  TRACE("*******EXPORT DATA*******\n");
  TRACE("Module name is %s, %ld functions, %ld names\n", 
        Module, pe_exports->NumberOfFunctions, pe_exports->NumberOfNames);

  ordinal=(u_short*) RVA(pe_exports->AddressOfNameOrdinals);
  functions=function=(u_long*) RVA(pe_exports->AddressOfFunctions);
  name=(u_char**) RVA(pe_exports->AddressOfNames);

  TRACE(" Ord    RVA     Addr   Name\n" );
  for (i=0;i<pe_exports->NumberOfFunctions;i++, function++)
  {
      if (!*function) continue;  
      if (TRACE_ON(win32))
      {
	DPRINTF( "%4ld %08lx %p", i + pe_exports->Base, *function, RVA(*function) );
	
	for (j = 0; j < pe_exports->NumberOfNames; j++)
          if (ordinal[j] == i)
          {
              DPRINTF( "  %s", (char*)RVA(name[j]) );
              break;
          }
	if ((*function >= rva_start) && (*function <= rva_end))
	  DPRINTF(" (forwarded -> %s)", (char *)RVA(*function));
	DPRINTF("\n");
      }
  }
}

/* Look up the specified function or ordinal in the exportlist:
 * If it is a string:
 * 	- look up the name in the Name list. 
 *	- look up the ordinal with that index.
 *	- use the ordinal as offset into the functionlist
 * If it is a ordinal:
 *	- use ordinal-pe_export->Base as offset into the functionlist
 */
FARPROC PE_FindExportedFunction( 
	WINE_MODREF *wm,	
	LPCSTR funcName,	
        WIN_BOOL snoop )
{
	u_short				* ordinals;
	u_long				* function;
	u_char				** name;
	const char *ename = NULL;
	int				i, ordinal;
	PE_MODREF			*pem = &(wm->binfmt.pe);
	IMAGE_EXPORT_DIRECTORY 		*exports = pem->pe_export;
	unsigned int			load_addr = wm->module;
	u_long				rva_start, rva_end, addr;
	char				* forward;

	if (HIWORD(funcName))
		TRACE("(%s)\n",funcName);
	else
		TRACE("(%d)\n",(int)funcName);
	if (!exports) {
		/* Not a fatal problem, some apps do
		 * GetProcAddress(0,"RegisterPenApp") which triggers this
		 * case.
		 */
		WARN("Module %08x(%s)/MODREF %p doesn't have a exports table.\n",wm->module,wm->modname,pem);
		return NULL;
	}
	ordinals= (u_short*)  RVA(exports->AddressOfNameOrdinals);
	function= (u_long*)   RVA(exports->AddressOfFunctions);
	name	= (u_char **) RVA(exports->AddressOfNames);
	forward = NULL;
	rva_start = PE_HEADER(wm->module)->OptionalHeader
		.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
	rva_end = rva_start + PE_HEADER(wm->module)->OptionalHeader
		.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;

	if (HIWORD(funcName))
        {
            
            int min = 0, max = exports->NumberOfNames - 1;
            while (min <= max)
            {
                int res, pos = (min + max) / 2;
		ename = (const char*) RVA(name[pos]);
		if (!(res = strcmp( ename, funcName )))
                {
                    ordinal = ordinals[pos];
                    goto found;
                }
                if (res > 0) max = pos - 1;
                else min = pos + 1;
            }
            
	    for (i = 0; i < exports->NumberOfNames; i++)
            {
		ename = (const char*) RVA(name[i]);
                if (!strcmp( ename, funcName ))
                {
		    ERR( "%s.%s required a linear search\n", wm->modname, funcName );
                    ordinal = ordinals[i];
                    goto found;
                }
            }
            return NULL;
	}
        else  
        {
            ordinal = LOWORD(funcName) - exports->Base;
            if (snoop && name)  
            {
                for (i = 0; i < exports->NumberOfNames; i++)
                    if (ordinals[i] == ordinal)
                    {
                        ename = RVA(name[i]);
                        break;
                    }
            }
	}

 found:
        if (ordinal >= exports->NumberOfFunctions)
        {
            TRACE("	ordinal %ld out of range!\n", ordinal + exports->Base );
            return NULL;
        }
        addr = function[ordinal];
        if (!addr) return NULL;
        if ((addr < rva_start) || (addr >= rva_end))
        {
            FARPROC proc = RVA(addr);
            if (snoop)
            {
                if (!ename) ename = "@";
//                proc = SNOOP_GetProcAddress(wm->module,ename,ordinal,proc);
		TRACE("SNOOP_GetProcAddress n/a\n");
		
            }
            return proc;
        }
        else  
        {
                WINE_MODREF *wm;
                char *forward = RVA(addr);
		char module[256];
		char *end = strchr(forward, '.');

		if (!end) return NULL;
                if (end - forward >= sizeof(module)) return NULL;
                memcpy( module, forward, end - forward );
		module[end-forward] = 0;
                if (!(wm = MODULE_FindModule( module )))
                {
                    ERR("module not found for forward '%s'\n", forward );
                    return NULL;
                }
		return MODULE_GetProcAddress( wm->module, end + 1, snoop );
	}
}

static DWORD fixup_imports( WINE_MODREF *wm )
{
    IMAGE_IMPORT_DESCRIPTOR	*pe_imp;
    PE_MODREF			*pem;
    unsigned int load_addr	= wm->module;
    int				i,characteristics_detection=1;
    char			*modname;
    
    assert(wm->type==MODULE32_PE);
    pem = &(wm->binfmt.pe);
    if (pem->pe_export)
    	modname = (char*) RVA(pem->pe_export->Name);
    else
        modname = "<unknown>";

    
    TRACE("Dumping imports list\n");

    
    pe_imp = pem->pe_import;
    if (!pe_imp) return 0;

    /* We assume that we have at least one import with !0 characteristics and
     * detect broken imports with all characteristsics 0 (notably Borland) and
     * switch the detection off for them.
     */
    for (i = 0; pe_imp->Name ; pe_imp++) {
	if (!i && !pe_imp->u.Characteristics)
		characteristics_detection = 0;
	if (characteristics_detection && !pe_imp->u.Characteristics)
		break;
	i++;
    }
    if (!i) return 0;  

    
    wm->nDeps = i;
    wm->deps  = HeapAlloc( GetProcessHeap(), 0, i*sizeof(WINE_MODREF *) );

    /* load the imported modules. They are automatically 
     * added to the modref list of the process.
     */
 
    for (i = 0, pe_imp = pem->pe_import; pe_imp->Name ; pe_imp++) {
	IMAGE_IMPORT_BY_NAME	*pe_name;
	PIMAGE_THUNK_DATA	import_list,thunk_list;
 	char			*name = (char *) RVA(pe_imp->Name);

	if (characteristics_detection && !pe_imp->u.Characteristics)
		break;

//#warning FIXME: here we should fill imports
        TRACE("Loading imports for %s.dll\n", name);
    
	if (pe_imp->u.OriginalFirstThunk != 0) { 
	    TRACE("Microsoft style imports used\n");
	    import_list =(PIMAGE_THUNK_DATA) RVA(pe_imp->u.OriginalFirstThunk);
	    thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);

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

//		    TRACE("--- Ordinal %s,%d\n", name, ordinal);
		    
		    thunk_list->u1.Function=LookupExternal(name, ordinal);
		} else {		
		    pe_name = (PIMAGE_IMPORT_BY_NAME)RVA(import_list->u1.AddressOfData);
//		    TRACE("--- %s %s.%d\n", pe_name->Name, name, pe_name->Hint);
		    thunk_list->u1.Function=LookupExternalByName(name, pe_name->Name);
		}
		import_list++;
		thunk_list++;
	    }
	} else {	
	    TRACE("Borland style imports used\n");
	    thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);
	    while (thunk_list->u1.Ordinal) {
		if (IMAGE_SNAP_BY_ORDINAL(thunk_list->u1.Ordinal)) {