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- /***********************************************************
- Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
- The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior permission.
-
- STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
- THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
- FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
- OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* Support for dynamic loading of extension modules */
- /* If no dynamic linking is supported, this file still generates some code! */
-
- #include "allobjects.h"
- #include "osdefs.h"
- #include "importdl.h"
-
- extern int verbose; /* Defined in pythonrun.c */
-
- /* Explanation of some of the the various #defines used by dynamic linking...
-
- symbol -- defined for:
-
- DYNAMIC_LINK -- any kind of dynamic linking
- USE_RLD -- NeXT dynamic linking
- USE_DL -- Jack's dl for IRIX 4 or GNU dld with emulation for Jack's dl
- USE_SHLIB -- SunOS or IRIX 5 (SVR4?) shared libraries
- _AIX -- AIX style dynamic linking
- NT -- NT style dynamic linking (using DLLs)
- _DL_FUNCPTR_DEFINED -- if the typedef dl_funcptr has been defined
- USE_MAC_DYNAMIC_LOADING -- Mac CFM shared libraries
- SHORT_EXT -- short extension for dynamic module, e.g. ".so"
- LONG_EXT -- long extension, e.g. "module.so"
- hpux -- HP-UX Dynamic Linking - defined by the compiler
- __NetBSD__ -- NetBSD shared libraries (not quite SVR4 compatible)
-
- (The other WITH_* symbols are used only once, to set the
- appropriate symbols.)
- */
-
- /* Configure dynamic linking */
-
- #ifdef __hpux
- #define hpux
- #endif
-
- #ifdef hpux
- #define DYNAMIC_LINK
- #include <errno.h>
- typedef void (*dl_funcptr)();
- #define _DL_FUNCPTR_DEFINED 1
- #define SHORT_EXT ".sl"
- #define LONG_EXT "module.sl"
- #endif
-
- #ifdef __NetBSD__
- #define DYNAMIC_LINK
- #define USE_SHLIB
-
- #define dlerror() "error in dynamic linking"
- #endif
-
- #ifdef __WIN32__
- #define NT
- #endif
-
- #ifdef NT
- #define DYNAMIC_LINK
- #include <windows.h>
- typedef FARPROC dl_funcptr;
- #define _DL_FUNCPTR_DEFINED
- #define SHORT_EXT ".pyd"
- #define LONG_EXT "module.pyd"
- #endif
-
- #ifdef NeXT
- #define DYNAMIC_LINK
- #define USE_RLD
- #endif
-
- #ifdef WITH_SGI_DL
- #define DYNAMIC_LINK
- #define USE_DL
- #endif
-
- #ifdef WITH_DL_DLD
- #define DYNAMIC_LINK
- #define USE_DL
- #endif
-
- #ifdef __CFM68K__
- #define USE_MAC_DYNAMIC_LOADING
- #endif
-
- #ifdef USE_MAC_DYNAMIC_LOADING
- #define DYNAMIC_LINK
- #define SHORT_EXT ".slb"
- #define LONG_EXT "module.slb"
- #ifndef _DL_FUNCPTR_DEFINED
- typedef void (*dl_funcptr)();
- #endif
- #endif
-
- #if !defined(DYNAMIC_LINK) && defined(HAVE_DLFCN_H) && defined(HAVE_DLOPEN)
- #define DYNAMIC_LINK
- #define USE_SHLIB
- #endif
-
- #ifdef _AIX
- #define DYNAMIC_LINK
- #include <sys/ldr.h>
- typedef void (*dl_funcptr)();
- #define _DL_FUNCPTR_DEFINED
- static void aix_loaderror(char *name);
- #endif
-
- #ifdef DYNAMIC_LINK
-
- #ifdef USE_SHLIB
- #include <sys/types.h>
- #include <sys/stat.h>
- #ifdef __NetBSD__
- #include <nlist.h>
- #include <link.h>
- #else
- #include <dlfcn.h>
- #endif
- #ifndef _DL_FUNCPTR_DEFINED
- typedef void (*dl_funcptr)();
- #endif
- #ifndef RTLD_LAZY
- #define RTLD_LAZY 1
- #endif
- #define SHORT_EXT ".so"
- #define LONG_EXT "module.so"
- #endif /* USE_SHLIB */
-
- #if defined(USE_DL) || defined(hpux)
- #include "dl.h"
- #endif
-
- #ifdef USE_MAC_DYNAMIC_LOADING
- #include <Aliases.h>
- #include <CodeFragments.h>
- #ifdef SYMANTEC__CFM68K__ /* Really just an older version of Universal Headers */
- #define CFragConnectionID ConnectionID
- #define kLoadCFrag 0x01
- #endif
- #include <Files.h>
- #include "macdefs.h"
- #include "macglue.h"
- #endif
-
- #ifdef USE_RLD
- #include <mach-o/rld.h>
- #define FUNCNAME_PATTERN "_init%.200s"
- #ifndef _DL_FUNCPTR_DEFINED
- typedef void (*dl_funcptr)();
- #endif
- #endif /* USE_RLD */
-
- extern char *getprogramname();
-
- #ifndef FUNCNAME_PATTERN
- #if defined(__hp9000s300) || defined(__NetBSD__) || defined(__BORLANDC__)
- #define FUNCNAME_PATTERN "_init%.200s"
- #else
- #define FUNCNAME_PATTERN "init%.200s"
- #endif
- #endif
-
- #if !defined(SHORT_EXT) && !defined(LONG_EXT)
- #define SHORT_EXT ".o"
- #define LONG_EXT "module.o"
- #endif /* !SHORT_EXT && !LONG_EXT */
-
- #endif /* DYNAMIC_LINK */
-
- /* Max length of module suffix searched for -- accommodates "module.slb" */
- #ifndef MAXSUFFIXSIZE
- #define MAXSUFFIXSIZE 12
- #endif
-
- /* Pass it on to import.c */
- int import_maxsuffixsize = MAXSUFFIXSIZE;
-
- struct filedescr import_filetab[] = {
- #ifdef SHORT_EXT
- {SHORT_EXT, "rb", C_EXTENSION},
- #endif /* !SHORT_EXT */
- #ifdef LONG_EXT
- {LONG_EXT, "rb", C_EXTENSION},
- #endif /* !LONG_EXT */
- {".py", "r", PY_SOURCE},
- {".pyc", "rb", PY_COMPILED},
- {0, 0}
- };
-
- object *
- load_dynamic_module(name, pathname, fp)
- char *name;
- char *pathname;
- FILE *fp;
- {
- #ifndef DYNAMIC_LINK
- err_setstr(ImportError, "dynamically linked modules not supported");
- return NULL;
- #else
- object *m;
- char funcname[258];
- dl_funcptr p = NULL;
- #ifdef USE_SHLIB
- static struct {
- dev_t dev;
- ino_t ino;
- void *handle;
- } handles[128];
- static int nhandles = 0;
- #endif
- sprintf(funcname, FUNCNAME_PATTERN, name);
- #ifdef USE_SHLIB
- if (fp != NULL) {
- int i;
- struct stat statb;
- fstat(fileno(fp), &statb);
- for (i = 0; i < nhandles; i++) {
- if (statb.st_dev == handles[i].dev &&
- statb.st_ino == handles[i].ino) {
- p = (dl_funcptr) dlsym(handles[i].handle,
- funcname);
- goto got_it;
- }
- }
- if (nhandles < 128) {
- handles[nhandles].dev = statb.st_dev;
- handles[nhandles].ino = statb.st_ino;
- }
- }
- #endif /* USE_SHLIB */
- #ifdef USE_MAC_DYNAMIC_LOADING
- /*
- ** Dynamic loading of CFM shared libraries on the Mac.
- ** The code has become more convoluted than it was, because we want to be able
- ** to put multiple modules in a single file. For this reason, we have to determine
- ** the fragment name, and we cannot use the library entry point but we have to locate
- ** the correct init routine "by hand".
- */
- {
- FSSpec libspec;
- CFragConnectionID connID;
- Ptr mainAddr;
- Str255 errMessage;
- OSErr err;
- Boolean isfolder, didsomething;
- char buf[512];
- Str63 fragname;
- Ptr symAddr;
- CFragSymbolClass class;
-
- /* First resolve any aliases to find the real file */
- (void)FSMakeFSSpec(0, 0, Pstring(pathname), &libspec);
- err = ResolveAliasFile(&libspec, 1, &isfolder, &didsomething);
- if ( err ) {
- sprintf(buf, "%s: %s", pathname, PyMac_StrError(err));
- err_setstr(ImportError, buf);
- return NULL;
- }
- /* Next, determine the fragment name, by stripping '.slb' and 'module' */
- memcpy(fragname+1, libspec.name+1, libspec.name[0]);
- fragname[0] = libspec.name[0];
- if( strncmp((char *)(fragname+1+fragname[0]-4), ".slb", 4) == 0 )
- fragname[0] -= 4;
- if ( strncmp((char *)(fragname+1+fragname[0]-6), "module", 6) == 0 )
- fragname[0] -= 6;
- /* Load the fragment (or return the connID if it is already loaded */
- err = GetDiskFragment(&libspec, 0, 0, fragname,
- kLoadCFrag, &connID, &mainAddr,
- errMessage);
- if ( err ) {
- sprintf(buf, "%.*s: %s", errMessage[0], errMessage+1, PyMac_StrError(err));
- err_setstr(ImportError, buf);
- return NULL;
- }
- /* Locate the address of the correct init function */
- err = FindSymbol(connID, Pstring(funcname), &symAddr, &class);
- if ( err ) {
- sprintf(buf, "%s: %s", funcname, PyMac_StrError(err));
- err_setstr(ImportError, buf);
- return NULL;
- }
- p = (dl_funcptr)symAddr;
- }
- #endif /* USE_MAC_DYNAMIC_LOADING */
- #ifdef USE_SHLIB
- {
- #ifdef RTLD_NOW
- /* RTLD_NOW: resolve externals now
- (i.e. core dump now if some are missing) */
- void *handle = dlopen(pathname, RTLD_NOW);
- #else
- void *handle;
- if (verbose)
- printf("dlopen(\"%s\", %d);\n", pathname, RTLD_LAZY);
- handle = dlopen(pathname, RTLD_LAZY);
- #endif /* RTLD_NOW */
- if (handle == NULL) {
- err_setstr(ImportError, dlerror());
- return NULL;
- }
- if (fp != NULL && nhandles < 128)
- handles[nhandles++].handle = handle;
- p = (dl_funcptr) dlsym(handle, funcname);
- }
- #endif /* USE_SHLIB */
- #ifdef _AIX
- p = (dl_funcptr) load(pathname, 1, 0);
- if (p == NULL) {
- aix_loaderror(pathname);
- return NULL;
- }
- #endif /* _AIX */
- #ifdef NT
- {
- HINSTANCE hDLL;
- hDLL = LoadLibrary(pathname);
- if (hDLL==NULL){
- char errBuf[256];
- unsigned int errorCode;
-
- /* Get an error string from Win32 error code */
- char theInfo[256]; /* Pointer to error text from system */
- int theLength; /* Length of error text */
-
- errorCode = GetLastError();
-
- theLength = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, /* flags */
- NULL, /* message source */
- errorCode, /* the message (error) ID */
- 0, /* default language environment */
- (LPTSTR) theInfo, /* the buffer */
- sizeof(theInfo), /* the buffer size */
- NULL); /* no additional format args. */
-
- /* Problem: could not get the error message. This should not happen if called correctly. */
- if (theLength == 0) {
- sprintf(errBuf, "DLL load failed with error code %d", errorCode);
- } else {
- int len;
- /* For some reason a \r\n is appended to the text */
- if (theLength >= 2 && theInfo[theLength-2] == '\r' && theInfo[theLength-1] == '\n') {
- theLength -= 2;
- theInfo[theLength] = '\0';
- }
- strcpy(errBuf, "DLL load failed: ");
- len = strlen(errBuf);
- strncpy(errBuf+len, theInfo, sizeof(errBuf)-len);
- errBuf[sizeof(errBuf)-1] = '\0';
- }
- err_setstr(ImportError, errBuf);
- return NULL;
- }
- p = GetProcAddress(hDLL, funcname);
- }
- #endif /* NT */
- #ifdef USE_DL
- p = dl_loadmod(getprogramname(), pathname, funcname);
- #endif /* USE_DL */
- #ifdef USE_RLD
- {
- NXStream *errorStream;
- struct mach_header *new_header;
- const char *filenames[2];
- long ret;
- unsigned long ptr;
-
- errorStream = NXOpenMemory(NULL, 0, NX_WRITEONLY);
- filenames[0] = pathname;
- filenames[1] = NULL;
- ret = rld_load(errorStream, &new_header,
- filenames, NULL);
-
- /* extract the error messages for the exception */
- if(!ret) {
- char *streamBuf;
- int len, maxLen;
-
- NXPutc(errorStream, (char)0);
-
- NXGetMemoryBuffer(errorStream,
- &streamBuf, &len, &maxLen);
- err_setstr(ImportError, streamBuf);
- }
-
- if(ret && rld_lookup(errorStream, funcname, &ptr))
- p = (dl_funcptr) ptr;
-
- NXCloseMemory(errorStream, NX_FREEBUFFER);
-
- if(!ret)
- return NULL;
- }
- #endif /* USE_RLD */
- #ifdef hpux
- {
- shl_t lib;
- int flags;
-
- flags = BIND_DEFERRED;
- if (verbose)
- {
- flags = BIND_IMMEDIATE | BIND_NONFATAL | BIND_VERBOSE;
- printf("shl_load %s\n",pathname);
- }
- lib = shl_load(pathname, flags, 0);
- if (lib == NULL)
- {
- char buf[256];
- if (verbose)
- perror(pathname);
- sprintf(buf, "Failed to load %.200s", pathname);
- err_setstr(ImportError, buf);
- return NULL;
- }
- if (verbose)
- printf("shl_findsym %s\n", funcname);
- shl_findsym(&lib, funcname, TYPE_UNDEFINED, (void *) &p);
- if (p == NULL && verbose)
- perror(funcname);
- }
- #endif /* hpux */
- got_it:
- if (p == NULL) {
- err_setstr(ImportError,
- "dynamic module does not define init function");
- return NULL;
- }
- (*p)();
-
- m = dictlookup(import_modules, name);
- if (m == NULL) {
- if (err_occurred() == NULL)
- err_setstr(SystemError,
- "dynamic module not initialized properly");
- return NULL;
- }
- if (verbose)
- fprintf(stderr,
- "import %s # dynamically loaded from %s\n",
- name, pathname);
- INCREF(m);
- return m;
- #endif /* DYNAMIC_LINK */
- }
-
-
- #ifdef _AIX
-
- #include <ctype.h> /* for isdigit() */
- #include <errno.h> /* for global errno */
- #include <string.h> /* for strerror() */
-
- void aix_loaderror(char *pathname)
- {
-
- char *message[8], errbuf[1024];
- int i,j;
-
- struct errtab {
- int errno;
- char *errstr;
- } load_errtab[] = {
- {L_ERROR_TOOMANY, "too many errors, rest skipped."},
- {L_ERROR_NOLIB, "can't load library:"},
- {L_ERROR_UNDEF, "can't find symbol in library:"},
- {L_ERROR_RLDBAD,
- "RLD index out of range or bad relocation type:"},
- {L_ERROR_FORMAT, "not a valid, executable xcoff file:"},
- {L_ERROR_MEMBER,
- "file not an archive or does not contain requested member:"},
- {L_ERROR_TYPE, "symbol table mismatch:"},
- {L_ERROR_ALIGN, "text allignment in file is wrong."},
- {L_ERROR_SYSTEM, "System error:"},
- {L_ERROR_ERRNO, NULL}
- };
-
- #define LOAD_ERRTAB_LEN (sizeof(load_errtab)/sizeof(load_errtab[0]))
- #define ERRBUF_APPEND(s) strncat(errbuf, s, sizeof(errbuf)-strlen(errbuf)-1)
-
- sprintf(errbuf, " from module %.200s ", pathname);
-
- if (!loadquery(1, &message[0], sizeof(message)))
- ERRBUF_APPEND(strerror(errno));
- for(i = 0; message[i] && *message[i]; i++) {
- int nerr = atoi(message[i]);
- for (j=0; j<LOAD_ERRTAB_LEN ; j++) {
- if (nerr == load_errtab[i].errno && load_errtab[i].errstr)
- ERRBUF_APPEND(load_errtab[i].errstr);
- }
- while (isdigit(*message[i])) message[i]++ ;
- ERRBUF_APPEND(message[i]);
- ERRBUF_APPEND("\n");
- }
- errbuf[strlen(errbuf)-1] = '\0'; /* trim off last newline */
- err_setstr(ImportError, errbuf);
- return;
- }
-
- #endif /* _AIX */
-