diff options
Diffstat (limited to 'unix/tclLoadOSF.c')
| -rw-r--r-- | unix/tclLoadOSF.c | 201 |
1 files changed, 138 insertions, 63 deletions
diff --git a/unix/tclLoadOSF.c b/unix/tclLoadOSF.c index 9e8b3ad..377ed28 100644 --- a/unix/tclLoadOSF.c +++ b/unix/tclLoadOSF.c @@ -1,10 +1,10 @@ -/* +/* * tclLoadOSF.c -- * - * This procedure provides a version of the TclLoadFile that works - * under OSF/1 1.0/1.1/1.2 and related systems, utilizing the old OSF/1 - * /sbin/loader and /usr/include/loader.h. OSF/1 versions from 1.3 and - * on use ELF, rtld, and dlopen()[/usr/include/ldfcn.h]. + * This function provides a version of the TclLoadFile that works under + * OSF/1 1.0/1.1/1.2 and related systems, utilizing the old OSF/1 + * /sbin/loader and /usr/include/loader.h. OSF/1 versions from 1.3 and on + * use ELF, rtld, and dlopen()[/usr/include/ldfcn.h]. * * This is useful for: * OSF/1 1.0, 1.1, 1.2 (from OSF) @@ -13,45 +13,48 @@ * HP OSF/1 1.0 ("Acorn") using COFF * * This is likely to be useful for: - * Paragon OSF/1 (from Intel) - * HI-OSF/1 (from Hitachi) + * Paragon OSF/1 (from Intel) + * HI-OSF/1 (from Hitachi) * * This is NOT to be used on: * Digitial Alpha OSF/1 systems * OSF/1 1.3 or later (from OSF) using ELF * includes: MK6, MK7, AD2, AD3 (from OSF RI) * - * This approach to things was utter @&^#; thankfully, - * OSF/1 eventually supported dlopen(). + * This approach to things was utter @&^#; thankfully, OSF/1 eventually + * supported dlopen(). * * John Robert LoVerso <loverso@freebsd.osf.org> * * Copyright (c) 1995-1997 Sun Microsystems, Inc. * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclLoadOSF.c,v 1.3 1999/04/16 00:48:04 stanton Exp $ + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #include "tclInt.h" #include <sys/types.h> #include <loader.h> + +/* + * Static functions defined within this file. + */ + +static void * FindSymbol(Tcl_Interp *interp, + Tcl_LoadHandle loadHandle, const char* symbol); +static void UnloadFile(Tcl_LoadHandle handle); /* *---------------------------------------------------------------------- * - * TclpLoadFile -- + * TclpDlopen -- * - * Dynamically loads a binary code file into memory and returns - * the addresses of two procedures within that file, if they - * are defined. + * Dynamically loads a binary code file into memory and returns a handle + * to the new code. * * Results: - * A standard Tcl completion code. If an error occurs, an error - * message is left in the interp's result. *proc1Ptr and *proc2Ptr - * are filled in with the addresses of the symbols given by - * *sym1 and *sym2, or NULL if those symbols can't be found. + * A standard Tcl completion code. If an error occurs, an error message + * is left in the interp's result. * * Side effects: * New code suddenly appears in memory. @@ -60,56 +63,120 @@ */ int -TclpLoadFile(interp, fileName, sym1, sym2, proc1Ptr, proc2Ptr, clientDataPtr) - Tcl_Interp *interp; /* Used for error reporting. */ - char *fileName; /* Name of the file containing the desired - * code. */ - char *sym1, *sym2; /* Names of two procedures to look up in - * the file's symbol table. */ - Tcl_PackageInitProc **proc1Ptr, **proc2Ptr; - /* Where to return the addresses corresponding - * to sym1 and sym2. */ - ClientData *clientDataPtr; /* Filled with token for dynamically loaded - * file which will be passed back to - * TclpUnloadFile() to unload the file. */ +TclpDlopen( + Tcl_Interp *interp, /* Used for error reporting. */ + Tcl_Obj *pathPtr, /* Name of the file containing the desired + * code (UTF-8). */ + Tcl_LoadHandle *loadHandle, /* Filled with token for dynamically loaded + * file which will be passed back to + * (*unloadProcPtr)() to unload the file. */ + Tcl_FSUnloadFileProc **unloadProcPtr, + /* Filled with address of Tcl_FSUnloadFileProc + * function which should be used for this + * file. */ + int flags) { + Tcl_LoadHandle newHandle; ldr_module_t lm; char *pkg; + char *fileName = Tcl_GetString(pathPtr); + const char *native; + + /* + * First try the full path the user gave us. This is particularly + * important if the cwd is inside a vfs, and we are trying to load using a + * relative path. + */ + + native = Tcl_FSGetNativePath(pathPtr); + lm = (Tcl_PackageInitProc *) load(native, LDR_NOFLAGS); - lm = (Tcl_PackageInitProc *) load(fileName, LDR_NOFLAGS); if (lm == LDR_NULL_MODULE) { - Tcl_AppendResult(interp, "couldn't load file \"", fileName, - "\": ", Tcl_PosixError (interp), (char *) NULL); + /* + * Let the OS loader examine the binary search path for whatever + * string the user gave us which hopefully refers to a file on the + * binary path + */ + + Tcl_DString ds; + + native = Tcl_UtfToExternalDString(NULL, fileName, -1, &ds); + lm = (Tcl_PackageInitProc *) load(native, LDR_NOFLAGS); + Tcl_DStringFree(&ds); + } + + if (lm == LDR_NULL_MODULE) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "couldn't load file \"%s\": %s", + fileName, Tcl_PosixError(interp))); return TCL_ERROR; } *clientDataPtr = NULL; - + /* * My convention is to use a [OSF loader] package name the same as shlib, * since the idiots never implemented ldr_lookup() and it is otherwise * impossible to get a package name given a module. * - * I build loadable modules with a makefile rule like + * I build loadable modules with a makefile rule like * ld ... -export $@: -o $@ $(OBJS) */ - if ((pkg = strrchr(fileName, '/')) == NULL) - pkg = fileName; - else + + if ((pkg = strrchr(fileName, '/')) == NULL) { + pkg = fileName; + } else { pkg++; - *proc1Ptr = ldr_lookup_package(pkg, sym1); - *proc2Ptr = ldr_lookup_package(pkg, sym2); + } + newHandle = ckalloc(sizeof(*newHandle)); + newHandle->clientData = pkg; + newHandle->findSymbolProcPtr = &FindSymbol; + newHandle->unloadFileProcPtr = &UnloadFile; + *loadHandle = newHandle; + *unloadProcPtr = &UnloadFile; return TCL_OK; } /* *---------------------------------------------------------------------- * - * TclpUnloadFile -- + * FindSymbol -- * - * Unloads a dynamically loaded binary code file from memory. - * Code pointers in the formerly loaded file are no longer valid - * after calling this function. + * Looks up a symbol, by name, through a handle associated with a + * previously loaded piece of code (shared library). + * + * Results: + * Returns a pointer to the function associated with 'symbol' if it is + * found. Otherwise returns NULL and may leave an error message in the + * interp's result. + * + *---------------------------------------------------------------------- + */ + +static void * +FindSymbol( + Tcl_Interp *interp, + Tcl_LoadHandle loadHandle, + const char *symbol) +{ + void *retval = ldr_lookup_package((char *) loadHandle, symbol); + + if (retval == NULL && interp != NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "cannot find symbol \"%s\"", symbol)); + Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "LOAD_SYMBOL", symbol, NULL); + } + return retval; +} + +/* + *---------------------------------------------------------------------- + * + * UnloadFile -- + * + * Unloads a dynamically loaded binary code file from memory. Code + * pointers in the formerly loaded file are no longer valid after calling + * this function. * * Results: * None. @@ -120,13 +187,13 @@ TclpLoadFile(interp, fileName, sym1, sym2, proc1Ptr, proc2Ptr, clientDataPtr) *---------------------------------------------------------------------- */ -void -TclpUnloadFile(clientData) - ClientData clientData; /* ClientData returned by a previous call - * to TclpLoadFile(). The clientData is - * a token that represents the loaded - * file. */ +static void +UnloadFile( + Tcl_LoadHandle loadHandle) /* loadHandle returned by a previous call to + * TclpDlopen(). The loadHandle is a token + * that represents the loaded file. */ { + ckfree(loadHandle); } /* @@ -134,14 +201,14 @@ TclpUnloadFile(clientData) * * TclGuessPackageName -- * - * If the "load" command is invoked without providing a package - * name, this procedure is invoked to try to figure it out. + * If the "load" command is invoked without providing a package name, + * this function is invoked to try to figure it out. * * Results: - * Always returns 0 to indicate that we couldn't figure out a - * package name; generic code will then try to guess the package - * from the file name. A return value of 1 would have meant that - * we figured out the package name and put it in bufPtr. + * Always returns 0 to indicate that we couldn't figure out a package + * name; generic code will then try to guess the package from the file + * name. A return value of 1 would have meant that we figured out the + * package name and put it in bufPtr. * * Side effects: * None. @@ -150,11 +217,19 @@ TclpUnloadFile(clientData) */ int -TclGuessPackageName(fileName, bufPtr) - char *fileName; /* Name of file containing package (already +TclGuessPackageName( + const char *fileName, /* Name of file containing package (already * translated to local form if needed). */ - Tcl_DString *bufPtr; /* Initialized empty dstring. Append - * package name to this if possible. */ + Tcl_DString *bufPtr) /* Initialized empty dstring. Append package + * name to this if possible. */ { return 0; } + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |