3 * Platform: NeXT NS 3.2
4 * Author: Anno Siegel (siegel@zrz.TU-Berlin.DE)
5 * Based on: dl_dlopen.xs by Paul Marquess
6 * Created: Aug 15th, 1994
11 And Gandalf said: 'Many folk like to know beforehand what is to
12 be set on the table; but those who have laboured to prepare the
13 feast like to keep their secret; for wonder makes the words of
19 dl_next.xs is itself a port from dl_dlopen.xs by Paul Marquess. It
20 should not be used as a base for further ports though it may be used
21 as an example for how dl_dlopen.xs can be ported to other platforms.
23 The method used here is just to supply the sun style dlopen etc.
24 functions in terms of NeXTs rld_*. The xs code proper is unchanged
27 The port could use some streamlining. For one, error handling could
34 #if NS_TARGET_MAJOR >= 4
36 /* include these before perl headers */
37 #include <mach-o/rld.h>
38 #include <streams/streams.h>
45 #define DL_LOADONCEONLY
49 } my_cxtx_t; /* this *must* be named my_cxtx_t */
51 #define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */
52 #include "dlutils.c" /* SaveError() etc */
54 #define dl_resolve_using (dl_cxtx.x_resolve_using)
56 static char *dlerror()
63 int dlclose(handle) /* stub only */
69 #if NS_TARGET_MAJOR >= 4
70 #import <mach-o/dyld.h>
77 static void TranslateError
78 (const char *path, enum dyldErrorSource type, int number)
84 static char *OFIErrorStrings[] =
86 "%s(%d): Object Image Load Failure\n",
87 "%s(%d): Object Image Load Success\n",
88 "%s(%d): Not an recognisable object file\n",
89 "%s(%d): No valid architecture\n",
90 "%s(%d): Object image has an invalid format\n",
91 "%s(%d): Invalid access (permissions?)\n",
92 "%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n",
94 #define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0]))
100 if (index > NUM_OFI_ERRORS - 1)
101 index = NUM_OFI_ERRORS - 1;
102 error = Perl_form_nocontext(OFIErrorStrings[index], path, number);
106 error = Perl_form_nocontext("%s(%d): Totally unknown error type %d\n",
110 Safefree(dl_last_error);
111 dl_last_error = savepv(error);
114 static char *dlopen(char *path, int mode /* mode is ignored */)
117 NSObjectFileImage ofile;
118 NSModule handle = NULL;
120 dyld_result = NSCreateObjectFileImageFromFile(path, &ofile);
121 if (dyld_result != NSObjectFileImageSuccess)
122 TranslateError(path, OFImage, dyld_result);
125 // NSLinkModule will cause the run to abort on any link error's
126 // not very friendly but the error recovery functionality is limited.
127 handle = NSLinkModule(ofile, path, TRUE);
134 dlsym(handle, symbol)
140 if (NSIsSymbolNameDefined(symbol))
141 addr = NSAddressOfSymbol(NSLookupAndBindSymbol(symbol));
148 #else /* NS_TARGET_MAJOR <= 3 */
150 static NXStream *OpenError(void)
152 return NXOpenMemory( (char *) 0, 0, NX_WRITEONLY);
155 static void TransferError(NXStream *s)
161 if ( dl_last_error ) {
162 Safefree(dl_last_error);
164 NXGetMemoryBuffer(s, &buffer, &len, &maxlen);
165 New(1097, dl_last_error, len, char);
166 strcpy(dl_last_error, buffer);
169 static void CloseError(NXStream *s)
172 NXCloseMemory( s, NX_FREEBUFFER);
176 static char *dlopen(char *path, int mode /* mode is ignored */)
186 /* Do not load what is already loaded into this process */
187 if (hv_fetch(dl_loaded_files, path, strlen(path), 0))
191 psize = AvFILL(dl_resolve_using) + 3;
192 p = (char **) safemalloc(psize * sizeof(char*));
194 for(i=1; i<psize-1; i++) {
195 p[i] = SvPVx(*av_fetch(dl_resolve_using, i-1, TRUE), n_a);
198 rld_success = rld_load(nxerr, (struct mach_header **)0, p,
203 /* prevent multiple loads of same file into same process */
204 hv_store(dl_loaded_files, path, strlen(path), &PL_sv_yes, 0);
206 TransferError(nxerr);
214 dlsym(handle, symbol)
218 NXStream *nxerr = OpenError();
219 unsigned long symref = 0;
221 if (!rld_lookup(nxerr, Perl_form_nocontext("_%s", symbol), &symref))
222 TransferError(nxerr);
224 return (void*) symref;
227 #endif /* NS_TARGET_MAJOR >= 4 */
230 /* ----- code from dl_dlopen.xs below here ----- */
234 dl_private_init(pTHX)
236 (void)dl_generic_private_init(aTHX);
239 dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI);
243 MODULE = DynaLoader PACKAGE = DynaLoader
246 (void)dl_private_init(aTHX);
251 dl_load_file(filename, flags=0)
257 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags));
259 Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename);
260 RETVAL = dlopen(filename, mode) ;
261 DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL));
262 ST(0) = sv_newmortal() ;
264 SaveError(aTHX_ "%s",dlerror()) ;
266 sv_setiv( ST(0), PTR2IV(RETVAL) );
270 dl_find_symbol(libhandle, symbolname)
274 #if NS_TARGET_MAJOR >= 4
275 symbolname = Perl_form_nocontext("_%s", symbolname);
277 DLDEBUG(2, PerlIO_printf(Perl_debug_log,
278 "dl_find_symbol(handle=%lx, symbol=%s)\n",
279 (unsigned long) libhandle, symbolname));
280 RETVAL = dlsym(libhandle, symbolname);
281 DLDEBUG(2, PerlIO_printf(Perl_debug_log,
282 " symbolref = %lx\n", (unsigned long) RETVAL));
283 ST(0) = sv_newmortal() ;
285 SaveError(aTHX_ "%s",dlerror()) ;
287 sv_setiv( ST(0), PTR2IV(RETVAL) );
296 # These functions should not need changing on any platform:
299 dl_install_xsub(perl_name, symref, filename="$Package")
304 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n",
306 ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name,
307 (void(*)(pTHX_ CV *))symref,
315 RETVAL = dl_last_error ;