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/*
* tclLoadNext.c --
*
* This procedure provides a version of the TclLoadFile that works with
* NeXTs rld_* dynamic loading. This file provided by Pedja Bogdanovich.
*
* 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: tclLoadNext.c,v 1.16 2010/03/11 15:02:33 nijtmans Exp $
*/
#include "tclInt.h"
#include <mach-o/rld.h>
#include <streams/streams.h>
/*
*----------------------------------------------------------------------
*
* TclpDlopen --
*
* Dynamically loads a binary code file into memory and returns a handle
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/*
* tclLoadNext.c --
*
* This procedure provides a version of the TclLoadFile that works with
* NeXTs rld_* dynamic loading. This file provided by Pedja Bogdanovich.
*
* 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: tclLoadNext.c,v 1.16.2.1 2010/06/07 17:36:45 rmax Exp $
*/
#include "tclInt.h"
#include <mach-o/rld.h>
#include <streams/streams.h>
/* Static procedures defined within this file */
static void* FindSymbol(Tcl_Interp* interp, Tcl_LoadHandle loadHandle,
const char* symbol);
static void UnloadFile(Tcl_LoadHandle loadHandle);
/*
*----------------------------------------------------------------------
*
* TclpDlopen --
*
* Dynamically loads a binary code file into memory and returns a handle
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* 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. */
{
struct mach_header *header;
char *fileName;
char *files[2];
const char *native;
int result = 1;
NXStream *errorStream = NXOpenMemory(0,0,NX_READWRITE);
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* 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. */
{
Tcl_LoadHandle newHandle;
struct mach_header *header;
char *fileName;
char *files[2];
const char *native;
int result = 1;
NXStream *errorStream = NXOpenMemory(0,0,NX_READWRITE);
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Tcl_AppendResult(interp, "couldn't load file \"", fileName, "\": ",
data, NULL);
NXCloseMemory(errorStream, NX_FREEBUFFER);
return TCL_ERROR;
}
NXCloseMemory(errorStream, NX_FREEBUFFER);
*loadHandle = (Tcl_LoadHandle)1; /* A dummy non-NULL value */
*unloadProcPtr = &TclpUnloadFile;
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* TclpFindSymbol --
*
* 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.
*
*----------------------------------------------------------------------
*/
Tcl_PackageInitProc *
TclpFindSymbol(
* 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(
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Tcl_AppendResult(interp, "couldn't load file \"", fileName, "\": ",
data, NULL);
NXCloseMemory(errorStream, NX_FREEBUFFER);
return TCL_ERROR;
}
NXCloseMemory(errorStream, NX_FREEBUFFER);
newHandle = (Tcl_LoadHandle) ckalloc(sizeof(*newHandle));
newHandle->clientData = (ClientData) 1;
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)
{
Tcl_PackageInitProc *proc = NULL;
if (symbol) {
char sym[strlen(symbol) + 2];
sym[0] = '_';
sym[1] = 0;
strcat(sym, symbol);
rld_lookup(NULL, sym, (unsigned long *)&proc);
}
if (proc == NULL && interp != NULL) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "cannot find symbol \"", symbol,
"\"", NULL);
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "LOAD_SYMBOL", symbol, NULL);
}
return proc;
}
/*
*----------------------------------------------------------------------
*
* 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?
*
*----------------------------------------------------------------------
*/
void
UnloadFile(
Tcl_LoadHandle loadHandle) /* loadHandle returned by a previous call to
* TclpDlopen(). The loadHandle is a token
* that represents the loaded file. */
{
ckfree((char*) loadHandle);
}
/*
*----------------------------------------------------------------------
*
* TclGuessPackageName --
*
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