mpv/loader/elfdll.c

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/*
* Elf-dll loader functions
*
* Copyright 1999 Bertho A. Stultiens
*/
#include <config.h>
#ifdef HAVE_LIBDL
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <wine/windef.h>
//#include <wine/global.h>
//#include <wine/process.h>
#include <wine/module.h>
#include <wine/heap.h>
#include <wine/elfdll.h>
#include <wine/debugtools.h>
#include <wine/winerror.h>
//DEFAULT_DEBUG_CHANNEL(elfdll)
#include <dlfcn.h>
struct modref_list_t;
typedef struct modref_list_t
{
WINE_MODREF* wm;
struct modref_list_t *next;
struct modref_list_t *prev;
}
modref_list;
//WINE_MODREF *local_wm=NULL;
extern modref_list* local_wm;
/*------------------ HACKS -----------------*/
extern DWORD fixup_imports(WINE_MODREF *wm);
extern void dump_exports(HMODULE hModule);
/*---------------- END HACKS ---------------*/
//char *extra_ld_library_path = "/usr/lib/win32";
extern char* def_path;
struct elfdll_image
{
HMODULE pe_module_start;
DWORD pe_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 = def_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;
}
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_CreateModref (internal)
*
* INPUT
* hModule - the header from the elf-dll's data-segment
* path - requested path from original call
*
* OUTPUT
* A WINE_MODREF pointer to the new object
*
* BUGS
* - Does not handle errors due to dependencies correctly
* - path can be wrong
*/
#define RVA(base, va) (((DWORD)base) + ((DWORD)va))
static WINE_MODREF *ELFDLL_CreateModref(HMODULE hModule, LPCSTR path)
{
// IMAGE_NT_HEADERS *nt = PE_HEADER(hModule);
IMAGE_DATA_DIRECTORY *dir;
IMAGE_IMPORT_DESCRIPTOR *pe_import = NULL;
WINE_MODREF *wm;
int len;
HANDLE procheap = GetProcessHeap();
wm = (WINE_MODREF *)HeapAlloc(procheap, HEAP_ZERO_MEMORY, sizeof(*wm));
if(!wm)
return NULL;
wm->module = hModule;
wm->type = MODULE32_ELF; /* FIXME */
// dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXPORT;
// if(dir->Size)
// wm->binfmt.pe.pe_export = (PIMAGE_EXPORT_DIRECTORY)RVA(hModule, dir->VirtualAddress);
// dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IMPORT;
// if(dir->Size)
// pe_import = wm->binfmt.pe.pe_import = (PIMAGE_IMPORT_DESCRIPTOR)RVA(hModule, dir->VirtualAddress);
// dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_RESOURCE;
// if(dir->Size)
// wm->binfmt.pe.pe_resource = (PIMAGE_RESOURCE_DIRECTORY)RVA(hModule, dir->VirtualAddress);
wm->filename = malloc(strlen(path)+1);
strcpy(wm->filename, path);
wm->modname = strrchr( wm->filename, '\\' );
if (!wm->modname) wm->modname = wm->filename;
else wm->modname++;
/*
len = GetShortPathNameA( wm->filename, NULL, 0 );
wm->short_filename = (char *)HeapAlloc( procheap, 0, len+1 );
GetShortPathNameA( wm->filename, wm->short_filename, len+1 );
wm->short_modname = strrchr( wm->short_filename, '\\' );
if (!wm->short_modname) wm->short_modname = wm->short_filename;
else wm->short_modname++;
*/
/* Link MODREF into process list */
// EnterCriticalSection( &PROCESS_Current()->crit_section );
if(local_wm)
{
local_wm->next=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;
}
// LeaveCriticalSection( &PROCESS_Current()->crit_section );
return wm;
}
/****************************************************************************
* 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 = ELFDLL_CreateModref((int)dlhandle, path);
if(!wm)
{
ERR("Could not create WINE_MODREF for %s\n", path);
dlclose(dlhandle);
SetLastError( ERROR_OUTOFMEMORY );
return NULL;
}
return wm;
}
/****************************************************************************
* ELFDLL_UnloadLibrary (internal)
*
* Unload an elf-dll completely from memory and deallocate the modref
*/
void ELFDLL_UnloadLibrary(WINE_MODREF *wm)
{
}
#endif /*HAVE_LIBDL*/