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authorWilliam Joye <wjoye@cfa.harvard.edu>2017-10-17 19:50:58 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2017-10-17 19:50:58 (GMT)
commit9b7a6c3507ea3383c60aaecb29f873c9b590ccca (patch)
tree82ce31ebd8f46803d969034f5aa3db8d7974493c /tcl8.6/unix/tclLoadOSF.c
parent87fca7325b97005eb44dcf3e198277640af66115 (diff)
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diff --git a/tcl8.6/unix/tclLoadOSF.c b/tcl8.6/unix/tclLoadOSF.c
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-/*
- * 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.
- */
-
-#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);
-
-/*
- *----------------------------------------------------------------------
- *
- * 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. */
- 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);
-
- 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_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
- * ld ... -export $@: -o $@ $(OBJS)
- */
-
- if ((pkg = strrchr(fileName, '/')) == NULL) {
- pkg = fileName;
- } else {
- pkg++;
- }
- newHandle = ckalloc(sizeof(*newHandle));
- newHandle->clientData = pkg;
- newHandle->findSymbolProcPtr = &FindSymbol;
- newHandle->unloadFileProcPtr = &UnloadFile;
- *loadHandle = newHandle;
- *unloadProcPtr = &UnloadFile;
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * FindSymbol --
- *
- * 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.
- *
- * Side effects:
- * Does nothing. Can anything be done?
- *
- *----------------------------------------------------------------------
- */
-
-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);
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * 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:
- */