Sweden-Number/loader/elfdll.c

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/*
* Elf-dll loader functions
*
* Copyright 1999 Bertho A. Stultiens
*/
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include "config.h"
#include "windef.h"
#include "global.h"
#include "process.h"
#include "module.h"
#include "neexe.h"
#include "heap.h"
#include "wine/winbase16.h"
#include "elfdll.h"
#include "debugtools.h"
#include "winerror.h"
DEFAULT_DEBUG_CHANNEL(elfdll)
#if defined(HAVE_DL_API)
#include <dlfcn.h>
/*------------------ HACKS -----------------*/
extern DWORD fixup_imports(WINE_MODREF *wm);
extern void dump_exports(HMODULE hModule);
/*---------------- END HACKS ---------------*/
char *extra_ld_library_path = NULL; /* The extra search-path set in wine.conf */
struct elfdll_image
{
HMODULE pe_module_start;
DWORD pe_module_size;
NE_MODULE *ne_module_start;
DWORD ne_module_size;
};
/****************************************************************************
* ELFDLL_dlopen
*
* Wrapper for dlopen to search the EXTRA_LD_LIBRARY_PATH from wine.conf
* manually because libdl.so caches the environment and does not accept our
* changes.
*/
void *ELFDLL_dlopen(const char *libname, int flags)
{
char buffer[256];
int namelen;
void *handle;
char *ldpath;
/* First try the default path search of dlopen() */
handle = dlopen(libname, flags);
if(handle)
return handle;
/* Now try to construct searches through our extra search-path */
namelen = strlen(libname);
ldpath = extra_ld_library_path;
while(ldpath && *ldpath)
{
int len;
char *cptr;
char *from;
from = ldpath;
cptr = strchr(ldpath, ':');
if(!cptr)
{
len = strlen(ldpath);
ldpath = NULL;
}
else
{
len = cptr - ldpath;
ldpath = cptr + 1;
}
if(len + namelen + 1 >= sizeof(buffer))
{
ERR("Buffer overflow! Check EXTRA_LD_LIBRARY_PATH or increase buffer size.\n");
return NULL;
}
strncpy(buffer, from, len);
if(len)
{
buffer[len] = '/';
strcpy(buffer + len + 1, libname);
}
else
strcpy(buffer + len, libname);
TRACE("Trying dlopen('%s', %d)\n", buffer, flags);
handle = dlopen(buffer, flags);
if(handle)
return handle;
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else
TRACE("possible dlopen() error: %s\n", dlerror());
}
return NULL;
}
/****************************************************************************
* get_sobasename (internal)
*
*/
static LPSTR get_sobasename(LPCSTR path, LPSTR name)
{
char *cptr;
/* Strip the path from the library name */
if((cptr = strrchr(path, '/')))
{
char *cp = strrchr(cptr+1, '\\');
if(cp && cp > cptr)
cptr = cp;
}
else
cptr = strrchr(path, '\\');
if(!cptr)
cptr = (char *)path; /* No '/' nor '\\' in path */
else
cptr++;
strcpy(name, cptr);
cptr = strrchr(name, '.');
if(cptr)
*cptr = '\0'; /* Strip extension */
/* Convert to lower case.
* This must be done manually because it is not sure that
* other modules are accessible.
*/
for(cptr = name; *cptr; cptr++)
*cptr = tolower(*cptr);
return name;
}
/****************************************************************************
* ELFDLL_LoadLibraryExA (internal)
*
* Implementation of elf-dll loading for PE modules
*/
WINE_MODREF *ELFDLL_LoadLibraryExA(LPCSTR path, DWORD flags)
{
LPVOID dlhandle;
struct elfdll_image *image;
char name[129];
char soname[129];
WINE_MODREF *wm;
get_sobasename(path, name);
strcpy(soname, name);
strcat(soname, ".so");
/* Try to open the elf-dll */
dlhandle = ELFDLL_dlopen(soname, RTLD_LAZY);
if(!dlhandle)
{
WARN("Could not load %s (%s)\n", soname, dlerror());
SetLastError( ERROR_FILE_NOT_FOUND );
return NULL;
}
/* Get the 'dllname_elfdll_image' variable */
strcpy(soname, name);
strcat(soname, "_elfdll_image");
image = (struct elfdll_image *)dlsym(dlhandle, soname);
if(!image)
{
ERR("Could not get elfdll image descriptor %s (%s)\n", soname, dlerror());
dlclose(dlhandle);
SetLastError( ERROR_BAD_FORMAT );
return NULL;
}
wm = PE_CreateModule( image->pe_module_start, path, 0, -1, FALSE );
if(!wm)
{
ERR("Could not create WINE_MODREF for %s\n", path);
dlclose(dlhandle);
SetLastError( ERROR_OUTOFMEMORY );
return NULL;
}
wm->dlhandle = dlhandle;
dump_exports(image->pe_module_start);
return wm;
}
#else
/*
* No elfdlls possible
* Just put stubs in here.
*/
WINE_MODREF *ELFDLL_LoadLibraryExA(LPCSTR libname, DWORD flags)
{
SetLastError( ERROR_FILE_NOT_FOUND );
return NULL;
}
#endif