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/*
* 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) 1995-1997 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 1.1 2000/08/14 19:44:24 jgdavidson Exp $
*/
#include "tclInt.h"
#include <sys/types.h>
#include <loader.h>
/*
*----------------------------------------------------------------------
*
* TclpLoadFile --
*
* 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 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.
*
* Side effects:
* New code suddenly appears in memory.
*
*----------------------------------------------------------------------
*/
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. */
{
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;
}
*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++;
*proc1Ptr = ldr_lookup_package(pkg, sym1);
*proc2Ptr = ldr_lookup_package(pkg, sym2);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* 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(clientData)
ClientData clientData; /* ClientData returned by a previous call
* to TclpLoadFile(). The clientData is
* a token that represents the loaded
* file. */
{
}
/*
*----------------------------------------------------------------------
*
* 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;
}
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