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markom |
/*
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* tclLoadOSF.c --
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*
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* This procedure provides a version of the TclLoadFile that works
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* under OSF/1 1.0/1.1/1.2 and related systems, utilizing the old OSF/1
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* /sbin/loader and /usr/include/loader.h. OSF/1 versions from 1.3 and
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* on use ELF, rtld, and dlopen()[/usr/include/ldfcn.h].
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*
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* This is useful for:
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* OSF/1 1.0, 1.1, 1.2 (from OSF)
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* includes: MK4 and AD1 (from OSF RI)
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* OSF/1 1.3 (from OSF) using ROSE
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* HP OSF/1 1.0 ("Acorn") using COFF
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*
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* This is likely to be useful for:
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* Paragon OSF/1 (from Intel)
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* HI-OSF/1 (from Hitachi)
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*
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* This is NOT to be used on:
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* Digitial Alpha OSF/1 systems
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* OSF/1 1.3 or later (from OSF) using ELF
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* includes: MK6, MK7, AD2, AD3 (from OSF RI)
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*
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* This approach to things was utter @&^#; thankfully,
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* OSF/1 eventually supported dlopen().
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*
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* John Robert LoVerso <loverso@freebsd.osf.org>
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*
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* Copyright (c) 1995 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tclLoadOSF.c,v 1.1.1.1 2002-01-16 10:25:37 markom Exp $
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*/
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#include "tclInt.h"
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#include <sys/types.h>
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#include <loader.h>
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/*
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*----------------------------------------------------------------------
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*
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* TclLoadFile --
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*
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* Dynamically loads a binary code file into memory and returns
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* the addresses of two procedures within that file, if they
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* are defined.
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*
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* Results:
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* A standard Tcl completion code. If an error occurs, an error
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* message is left in interp->result. *proc1Ptr and *proc2Ptr
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* are filled in with the addresses of the symbols given by
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* *sym1 and *sym2, or NULL if those symbols can't be found.
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*
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* Side effects:
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* New code suddenly appears in memory.
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*
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*----------------------------------------------------------------------
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*/
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int
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TclLoadFile(interp, fileName, sym1, sym2, proc1Ptr, proc2Ptr)
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Tcl_Interp *interp; /* Used for error reporting. */
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char *fileName; /* Name of the file containing the desired
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* code. */
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char *sym1, *sym2; /* Names of two procedures to look up in
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* the file's symbol table. */
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Tcl_PackageInitProc **proc1Ptr, **proc2Ptr;
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/* Where to return the addresses corresponding
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* to sym1 and sym2. */
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{
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ldr_module_t lm;
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char *pkg;
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lm = (Tcl_PackageInitProc *) load(fileName, LDR_NOFLAGS);
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if (lm == LDR_NULL_MODULE) {
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Tcl_AppendResult(interp, "couldn't load file \"", fileName,
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"\": ", Tcl_PosixError (interp), (char *) NULL);
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return TCL_ERROR;
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}
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/*
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* My convention is to use a [OSF loader] package name the same as shlib,
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* since the idiots never implemented ldr_lookup() and it is otherwise
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* impossible to get a package name given a module.
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*
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* I build loadable modules with a makefile rule like
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* ld ... -export $@: -o $@ $(OBJS)
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*/
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if ((pkg = strrchr(fileName, '/')) == NULL)
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pkg = fileName;
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else
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pkg++;
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*proc1Ptr = ldr_lookup_package(pkg, sym1);
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*proc2Ptr = ldr_lookup_package(pkg, sym2);
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return TCL_OK;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TclGuessPackageName --
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*
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* If the "load" command is invoked without providing a package
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* name, this procedure is invoked to try to figure it out.
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*
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* Results:
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* Always returns 0 to indicate that we couldn't figure out a
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* package name; generic code will then try to guess the package
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* from the file name. A return value of 1 would have meant that
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* we figured out the package name and put it in bufPtr.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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int
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TclGuessPackageName(fileName, bufPtr)
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char *fileName; /* Name of file containing package (already
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* translated to local form if needed). */
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Tcl_DString *bufPtr; /* Initialized empty dstring. Append
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* package name to this if possible. */
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{
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return 0;
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}
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