Sweden-Number/loader/elfdll.c

379 lines
8.7 KiB
C

/*
* 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 "debug.h"
#include "winerror.h"
DECLARE_DEBUG_CHANNEL(elfdll)
#if defined(HAVE_LIBDL) && defined(HAVE_DLFCN_H)
#include <dlfcn.h>
/*------------------ HACKS -----------------*/
extern DWORD fixup_imports(WINE_MODREF *wm);
/*---------------- 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(elfdll, "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(elfdll, "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+1;
else
cptr++;
}
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_PE; /* 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->modname = HEAP_strdupA(procheap, 0, (char *)RVA(hModule, wm->binfmt.pe.pe_export->Name));
len = GetLongPathNameA(path, NULL, 0);
wm->longname = (char *)HeapAlloc(procheap, 0, len+1);
GetLongPathNameA(path, wm->longname, len+1);
wm->shortname = HEAP_strdupA(procheap, 0, path);
/* Link MODREF into process list */
wm->next = PROCESS_Current()->modref_list;
PROCESS_Current()->modref_list = wm;
if(!(nt->FileHeader.Characteristics & IMAGE_FILE_DLL))
{
if(PROCESS_Current()->exe_modref)
FIXME(elfdll, "overwriting old exe_modref... arrgh\n");
PROCESS_Current()->exe_modref = wm;
}
/* Fixup Imports */
if(pe_import && fixup_imports(wm))
{
/* Error in this module or its dependencies
* remove entry from modref chain
*/
WINE_MODREF **xwm;
for(xwm = &(PROCESS_Current()->modref_list); *xwm; xwm = &((*xwm)->next))
{
if ( *xwm == wm )
{
*xwm = wm->next;
break;
}
}
if(wm == PROCESS_Current()->exe_modref)
ERR(elfdll, "Have to delete current exe_modref. Expect crash now\n");
HeapFree(procheap, 0, wm->shortname);
HeapFree(procheap, 0, wm->longname);
HeapFree(procheap, 0, wm->modname);
HeapFree(procheap, 0, wm);
return NULL;
/* FIXME: We should traverse back in the recursion
* with an error to unload everything that got loaded
* before this error occurred.
* Too dificult for now though and we don't care at the
* moment. But, it *MUST* be implemented someday because
* we won't be able to map the elf-dll twice in this
* address-space which can cause some unexpected and
* weird problems later on.
*/
}
return wm;
}
/***********************************************************************
* ELFDLL_CreateNEModule
*
* Create a dummy NE module for the win32 elf-dll based on the supplied
* NE header in the elf-dll.
*/
static HMODULE16 ELFDLL_CreateNEModule(NE_MODULE *ne_image, DWORD size)
{
HMODULE16 hModule = GLOBAL_CreateBlock(GMEM_MOVEABLE, ne_image, size, 0,
FALSE, FALSE, FALSE, NULL);
if(!hModule)
return (HMODULE16)0;
FarSetOwner16(hModule, hModule);
NE_RegisterModule(ne_image);
return hModule;
}
/****************************************************************************
* ELFDLL_LoadLibraryExA (internal)
*
* Implementation of elf-dll loading for PE modules
*/
WINE_MODREF *ELFDLL_LoadLibraryExA(LPCSTR path, DWORD flags, DWORD *err)
{
LPVOID dlhandle;
struct elfdll_image *image;
char name[129];
char soname[129];
HMODULE16 hmod16;
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(elfdll, "Could not load %s (%s)\n", soname, dlerror());
*err = 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(elfdll, "Could not get elfdll image descriptor %s (%s)\n", soname, dlerror());
dlclose(dlhandle);
*err = ERROR_BAD_FORMAT;
return NULL;
}
/* Create a win16 dummy module */
hmod16 = ELFDLL_CreateNEModule(image->ne_module_start, image->ne_module_size);
if(!hmod16)
{
ERR(elfdll, "Could not create win16 dummy module for %s\n", path);
dlclose(dlhandle);
*err = ERROR_OUTOFMEMORY;
return NULL;
}
image->ne_module_start->module32 = image->pe_module_start;
wm = ELFDLL_CreateModref(image->pe_module_start, path);
if(!wm)
{
ERR(elfdll, "Could not create WINE_MODREF for %s\n", path);
GLOBAL_FreeBlock((HGLOBAL16)hmod16);
dlclose(dlhandle);
*err = ERROR_OUTOFMEMORY;
return NULL;
}
*err = 0;
return wm;
}
/****************************************************************************
* ELFDLL_UnloadLibrary (internal)
*
* Unload an elf-dll completely from memory and deallocate the modref
*/
void ELFDLL_UnloadLibrary(WINE_MODREF *wm)
{
}
/****************************************************************************
* ELFDLL_LoadModule16 (internal)
*
* Implementation of elf-dll loading for NE modules
*/
HINSTANCE16 ELFDLL_LoadModule16(LPCSTR libname, BOOL implicit)
{
return (HINSTANCE16)ERROR_FILE_NOT_FOUND;
}
#else
/*
* No elfdlls possible
* Just put stubs in here.
*/
WINE_MODREF *ELFDLL_LoadLibraryExA(LPCSTR libname, DWORD flags, DWORD *err)
{
*err = ERROR_FILE_NOT_FOUND;
return NULL;
}
void ELFDLL_UnloadLibrary(WINE_MODREF *wm)
{
}
HINSTANCE16 ELFDLL_LoadModule16(LPCSTR libname, BOOL implicit)
{
return (HINSTANCE16)ERROR_FILE_NOT_FOUND;
}
#endif