tclLoadOSF.c Go to the documentation of this file. /* * tclLoadOSF.c -- * * 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) * includes: MK4 and AD1 (from OSF RI) * OSF/1 1.3 (from OSF) using ROSE * 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) * * 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(). * * 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 1.13 2005/11/11 23:46:34 dkf Exp $ */ #include "tclInt.h" #include <sys/types.h> #include <loader.h>  /* *---------------------------------------------------------------------- * * TclpDlopen -- * * 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. * * Side effects: * New code suddenly appears in memory. * *---------------------------------------------------------------------- */ int 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. */ { 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); if (lm == LDR_NULL_MODULE) { /* * 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_AppendResult(interp, "couldn't load file \"", fileName, "\": ", Tcl_PosixError(interp), NULL); 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 * ld ... -export $@: -o $@ $(OBJS) */ if ((pkg = strrchr(fileName, '/')) == NULL) { pkg = fileName; } else { pkg++; } *loadHandle = pkg; *unloadProcPtr = &TclpUnloadFile; return TCL_OK; }  /* *---------------------------------------------------------------------- * * TclpFindSymbol -- * * 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. * *---------------------------------------------------------------------- */ Tcl_PackageInitProc * TclpFindSymbol( Tcl_Interp *interp, Tcl_LoadHandle loadHandle, CONST char *symbol) { return ldr_lookup_package((char *)loadHandle, symbol); }  /* *---------------------------------------------------------------------- * * TclpUnloadFile -- * * 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. * * Side effects: * Does nothing. Can anything be done? * *---------------------------------------------------------------------- */ void TclpUnloadFile( Tcl_LoadHandle loadHandle) /* loadHandle returned by a previous call to * TclpDlopen(). The loadHandle is a token * that represents the loaded file. */ { }  /* *---------------------------------------------------------------------- * * TclGuessPackageName -- * * 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. * * Side effects: * None. * *---------------------------------------------------------------------- */ int 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. */ { return 0; }  /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */

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