236 lines
6.3 KiB
C
236 lines
6.3 KiB
C
|
/*
|
|||
|
|
* 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:
|
|||
|
|
*/
|