Logo Search packages:      
Sourcecode: tcl8.0 version File versions  Download package

tclLoadOSF.c

/* 
 * 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 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 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 1.2 1998/09/14 18:40:17 stanton Exp $
 */

#include "tclInt.h"
#include <sys/types.h>
#include <loader.h>

/*
 *----------------------------------------------------------------------
 *
 * TclLoadFile --
 *
 *    Dynamically loads a binary code file into memory and returns
 *    the addresses of two procedures within that file, if they
 *    are defined.
 *
 * Results:
 *    A standard Tcl completion code.  If an error occurs, an error
 *    message is left in interp->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.
 *
 * Side effects:
 *    New code suddenly appears in memory.
 *
 *----------------------------------------------------------------------
 */

int
TclLoadFile(interp, fileName, sym1, sym2, proc1Ptr, proc2Ptr)
    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. */
{
    ldr_module_t lm;
    char *pkg;

    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);
      return TCL_ERROR;
    }

    /*
     * 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++;
    *proc1Ptr = ldr_lookup_package(pkg, sym1);
    *proc2Ptr = ldr_lookup_package(pkg, sym2);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TclGuessPackageName --
 *
 *    If the "load" command is invoked without providing a package
 *    name, this procedure 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(fileName, bufPtr)
    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;
}

Generated by  Doxygen 1.6.0   Back to index