379 lines
8.7 KiB
C
379 lines
8.7 KiB
C
/*
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* Elf-dll loader functions
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*
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* Copyright 1999 Bertho A. Stultiens
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*/
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#include <string.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include "config.h"
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#include "windef.h"
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#include "global.h"
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#include "process.h"
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#include "module.h"
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#include "neexe.h"
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#include "heap.h"
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#include "wine/winbase16.h"
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#include "elfdll.h"
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#include "debug.h"
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#include "winerror.h"
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DECLARE_DEBUG_CHANNEL(elfdll)
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#if defined(HAVE_LIBDL) && defined(HAVE_DLFCN_H)
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#include <dlfcn.h>
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/*------------------ HACKS -----------------*/
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extern DWORD fixup_imports(WINE_MODREF *wm);
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/*---------------- END HACKS ---------------*/
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char *extra_ld_library_path = NULL; /* The extra search-path set in wine.conf */
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struct elfdll_image
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{
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HMODULE pe_module_start;
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DWORD pe_module_size;
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NE_MODULE *ne_module_start;
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DWORD ne_module_size;
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};
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/****************************************************************************
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* ELFDLL_dlopen
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*
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* Wrapper for dlopen to search the EXTRA_LD_LIBRARY_PATH from wine.conf
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* manually because libdl.so caches the environment and does not accept our
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* changes.
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*/
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void *ELFDLL_dlopen(const char *libname, int flags)
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{
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char buffer[256];
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int namelen;
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void *handle;
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char *ldpath;
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/* First try the default path search of dlopen() */
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handle = dlopen(libname, flags);
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if(handle)
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return handle;
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/* Now try to construct searches through our extra search-path */
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namelen = strlen(libname);
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ldpath = extra_ld_library_path;
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while(ldpath && *ldpath)
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{
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int len;
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char *cptr;
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char *from;
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from = ldpath;
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cptr = strchr(ldpath, ':');
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if(!cptr)
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{
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len = strlen(ldpath);
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ldpath = NULL;
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}
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else
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{
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len = cptr - ldpath;
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ldpath = cptr + 1;
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}
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if(len + namelen + 1 >= sizeof(buffer))
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{
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ERR(elfdll, "Buffer overflow! Check EXTRA_LD_LIBRARY_PATH or increase buffer size.\n");
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return NULL;
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}
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strncpy(buffer, from, len);
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if(len)
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{
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buffer[len] = '/';
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strcpy(buffer + len + 1, libname);
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}
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else
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strcpy(buffer + len, libname);
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TRACE(elfdll, "Trying dlopen('%s', %d)\n", buffer, flags);
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handle = dlopen(buffer, flags);
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if(handle)
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return handle;
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}
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return NULL;
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}
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/****************************************************************************
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* get_sobasename (internal)
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*
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*/
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static LPSTR get_sobasename(LPCSTR path, LPSTR name)
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{
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char *cptr;
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/* Strip the path from the library name */
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if((cptr = strrchr(path, '/')))
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{
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char *cp = strrchr(cptr+1, '\\');
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if(cp && cp > cptr)
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cptr = cp+1;
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else
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cptr++;
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}
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else
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cptr = strrchr(path, '\\');
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if(!cptr)
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cptr = (char *)path; /* No '/' nor '\\' in path */
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else
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cptr++;
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strcpy(name, cptr);
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cptr = strrchr(name, '.');
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if(cptr)
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*cptr = '\0'; /* Strip extension */
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/* Convert to lower case.
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* This must be done manually because it is not sure that
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* other modules are accessible.
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*/
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for(cptr = name; *cptr; cptr++)
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*cptr = tolower(*cptr);
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return name;
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}
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/****************************************************************************
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* ELFDLL_CreateModref (internal)
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*
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* INPUT
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* hModule - the header from the elf-dll's data-segment
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* path - requested path from original call
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*
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* OUTPUT
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* A WINE_MODREF pointer to the new object
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*
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* BUGS
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* - Does not handle errors due to dependencies correctly
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* - path can be wrong
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*/
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#define RVA(base, va) (((DWORD)base) + ((DWORD)va))
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static WINE_MODREF *ELFDLL_CreateModref(HMODULE hModule, LPCSTR path)
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{
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IMAGE_NT_HEADERS *nt = PE_HEADER(hModule);
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IMAGE_DATA_DIRECTORY *dir;
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IMAGE_IMPORT_DESCRIPTOR *pe_import = NULL;
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WINE_MODREF *wm;
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int len;
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HANDLE procheap = GetProcessHeap();
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wm = (WINE_MODREF *)HeapAlloc(procheap, HEAP_ZERO_MEMORY, sizeof(*wm));
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if(!wm)
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return NULL;
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wm->module = hModule;
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wm->type = MODULE32_PE; /* FIXME */
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dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXPORT;
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if(dir->Size)
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wm->binfmt.pe.pe_export = (PIMAGE_EXPORT_DIRECTORY)RVA(hModule, dir->VirtualAddress);
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dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IMPORT;
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if(dir->Size)
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pe_import = wm->binfmt.pe.pe_import = (PIMAGE_IMPORT_DESCRIPTOR)RVA(hModule, dir->VirtualAddress);
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dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_RESOURCE;
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if(dir->Size)
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wm->binfmt.pe.pe_resource = (PIMAGE_RESOURCE_DIRECTORY)RVA(hModule, dir->VirtualAddress);
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wm->modname = HEAP_strdupA(procheap, 0, (char *)RVA(hModule, wm->binfmt.pe.pe_export->Name));
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len = GetLongPathNameA(path, NULL, 0);
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wm->longname = (char *)HeapAlloc(procheap, 0, len+1);
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GetLongPathNameA(path, wm->longname, len+1);
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wm->shortname = HEAP_strdupA(procheap, 0, path);
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/* Link MODREF into process list */
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wm->next = PROCESS_Current()->modref_list;
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PROCESS_Current()->modref_list = wm;
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if(!(nt->FileHeader.Characteristics & IMAGE_FILE_DLL))
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{
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if(PROCESS_Current()->exe_modref)
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FIXME(elfdll, "overwriting old exe_modref... arrgh\n");
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PROCESS_Current()->exe_modref = wm;
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}
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/* Fixup Imports */
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if(pe_import && fixup_imports(wm))
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{
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/* Error in this module or its dependencies
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* remove entry from modref chain
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*/
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WINE_MODREF **xwm;
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for(xwm = &(PROCESS_Current()->modref_list); *xwm; xwm = &((*xwm)->next))
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{
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if ( *xwm == wm )
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{
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*xwm = wm->next;
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break;
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}
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}
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if(wm == PROCESS_Current()->exe_modref)
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ERR(elfdll, "Have to delete current exe_modref. Expect crash now\n");
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HeapFree(procheap, 0, wm->shortname);
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HeapFree(procheap, 0, wm->longname);
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HeapFree(procheap, 0, wm->modname);
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HeapFree(procheap, 0, wm);
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return NULL;
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/* FIXME: We should traverse back in the recursion
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* with an error to unload everything that got loaded
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* before this error occurred.
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* Too dificult for now though and we don't care at the
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* moment. But, it *MUST* be implemented someday because
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* we won't be able to map the elf-dll twice in this
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* address-space which can cause some unexpected and
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* weird problems later on.
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*/
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}
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return wm;
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}
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/***********************************************************************
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* ELFDLL_CreateNEModule
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*
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* Create a dummy NE module for the win32 elf-dll based on the supplied
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* NE header in the elf-dll.
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*/
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static HMODULE16 ELFDLL_CreateNEModule(NE_MODULE *ne_image, DWORD size)
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{
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HMODULE16 hModule = GLOBAL_CreateBlock(GMEM_MOVEABLE, ne_image, size, 0,
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FALSE, FALSE, FALSE, NULL);
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if(!hModule)
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return (HMODULE16)0;
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FarSetOwner16(hModule, hModule);
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NE_RegisterModule(ne_image);
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return hModule;
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}
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/****************************************************************************
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* ELFDLL_LoadLibraryExA (internal)
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*
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* Implementation of elf-dll loading for PE modules
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*/
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WINE_MODREF *ELFDLL_LoadLibraryExA(LPCSTR path, DWORD flags, DWORD *err)
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{
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LPVOID dlhandle;
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struct elfdll_image *image;
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char name[129];
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char soname[129];
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HMODULE16 hmod16;
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WINE_MODREF *wm;
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get_sobasename(path, name);
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strcpy(soname, name);
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strcat(soname, ".so");
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/* Try to open the elf-dll */
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dlhandle = ELFDLL_dlopen(soname, RTLD_LAZY);
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if(!dlhandle)
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{
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WARN(elfdll, "Could not load %s (%s)\n", soname, dlerror());
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*err = ERROR_FILE_NOT_FOUND;
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return NULL;
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}
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/* Get the 'dllname_elfdll_image' variable */
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strcpy(soname, name);
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strcat(soname, "_elfdll_image");
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image = (struct elfdll_image *)dlsym(dlhandle, soname);
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if(!image)
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{
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ERR(elfdll, "Could not get elfdll image descriptor %s (%s)\n", soname, dlerror());
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dlclose(dlhandle);
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*err = ERROR_BAD_FORMAT;
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return NULL;
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}
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/* Create a win16 dummy module */
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hmod16 = ELFDLL_CreateNEModule(image->ne_module_start, image->ne_module_size);
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if(!hmod16)
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{
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ERR(elfdll, "Could not create win16 dummy module for %s\n", path);
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dlclose(dlhandle);
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*err = ERROR_OUTOFMEMORY;
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return NULL;
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}
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image->ne_module_start->module32 = image->pe_module_start;
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wm = ELFDLL_CreateModref(image->pe_module_start, path);
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if(!wm)
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{
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ERR(elfdll, "Could not create WINE_MODREF for %s\n", path);
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GLOBAL_FreeBlock((HGLOBAL16)hmod16);
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dlclose(dlhandle);
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*err = ERROR_OUTOFMEMORY;
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return NULL;
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}
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*err = 0;
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return wm;
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}
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/****************************************************************************
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* ELFDLL_UnloadLibrary (internal)
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*
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* Unload an elf-dll completely from memory and deallocate the modref
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*/
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void ELFDLL_UnloadLibrary(WINE_MODREF *wm)
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{
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}
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/****************************************************************************
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* ELFDLL_LoadModule16 (internal)
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*
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* Implementation of elf-dll loading for NE modules
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*/
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HINSTANCE16 ELFDLL_LoadModule16(LPCSTR libname, BOOL implicit)
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{
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return (HINSTANCE16)ERROR_FILE_NOT_FOUND;
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}
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#else
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/*
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* No elfdlls possible
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* Just put stubs in here.
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*/
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WINE_MODREF *ELFDLL_LoadLibraryExA(LPCSTR libname, DWORD flags, DWORD *err)
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{
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*err = ERROR_FILE_NOT_FOUND;
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return NULL;
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}
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void ELFDLL_UnloadLibrary(WINE_MODREF *wm)
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{
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}
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HINSTANCE16 ELFDLL_LoadModule16(LPCSTR libname, BOOL implicit)
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{
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return (HINSTANCE16)ERROR_FILE_NOT_FOUND;
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}
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#endif
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