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a0d0e21e LW |
1 | /* dl_next.xs |
2 | * | |
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 | |
7 | * | |
8 | */ | |
9 | ||
10 | /* | |
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 | |
14 | praise louder.' | |
15 | */ | |
16 | ||
17 | /* Porting notes: | |
18 | ||
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. | |
22 | ||
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 | |
25 | from Paul's original. | |
26 | ||
27 | The port could use some streamlining. For one, error handling could | |
28 | be simplified. | |
29 | ||
30 | Anno Siegel | |
31 | ||
32 | */ | |
33 | ||
d6bcbf1c | 34 | #if NS_TARGET_MAJOR >= 4 |
35 | #else | |
8e07c86e AD |
36 | /* include these before perl headers */ |
37 | #include <mach-o/rld.h> | |
38 | #include <streams/streams.h> | |
d6bcbf1c | 39 | #endif |
8e07c86e | 40 | |
a0d0e21e LW |
41 | #include "EXTERN.h" |
42 | #include "perl.h" | |
43 | #include "XSUB.h" | |
44 | ||
8e07c86e | 45 | #define DL_LOADONCEONLY |
a0d0e21e | 46 | |
8e07c86e | 47 | #include "dlutils.c" /* SaveError() etc */ |
a0d0e21e | 48 | |
a0d0e21e LW |
49 | |
50 | static char * dl_last_error = (char *) 0; | |
8e07c86e | 51 | static AV *dl_resolve_using = Nullav; |
a0d0e21e | 52 | |
d6bcbf1c | 53 | static char *dlerror() |
54 | { | |
55 | return dl_last_error; | |
56 | } | |
57 | ||
58 | int dlclose(handle) /* stub only */ | |
59 | void *handle; | |
60 | { | |
61 | return 0; | |
62 | } | |
63 | ||
64 | #if NS_TARGET_MAJOR >= 4 | |
65 | #import <mach-o/dyld.h> | |
66 | ||
67 | enum dyldErrorSource | |
68 | { | |
69 | OFImage, | |
70 | }; | |
71 | ||
72 | static void TranslateError | |
73 | (const char *path, enum dyldErrorSource type, int number) | |
74 | { | |
5b877257 | 75 | dTHX; |
46fc3d4c | 76 | char *error; |
d6bcbf1c | 77 | unsigned int index; |
78 | static char *OFIErrorStrings[] = | |
79 | { | |
80 | "%s(%d): Object Image Load Failure\n", | |
81 | "%s(%d): Object Image Load Success\n", | |
82 | "%s(%d): Not an recognisable object file\n", | |
83 | "%s(%d): No valid architecture\n", | |
84 | "%s(%d): Object image has an invalid format\n", | |
85 | "%s(%d): Invalid access (permissions?)\n", | |
86 | "%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n", | |
87 | }; | |
88 | #define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0])) | |
89 | ||
d6bcbf1c | 90 | switch (type) |
91 | { | |
92 | case OFImage: | |
93 | index = number; | |
94 | if (index > NUM_OFI_ERRORS - 1) | |
95 | index = NUM_OFI_ERRORS - 1; | |
46fc3d4c | 96 | error = form(OFIErrorStrings[index], path, number); |
d6bcbf1c | 97 | break; |
98 | ||
99 | default: | |
46fc3d4c | 100 | error = form("%s(%d): Totally unknown error type %d\n", |
101 | path, number, type); | |
d6bcbf1c | 102 | break; |
103 | } | |
8c52afec | 104 | Safefree(dl_last_error); |
46fc3d4c | 105 | dl_last_error = savepv(error); |
d6bcbf1c | 106 | } |
107 | ||
108 | static char *dlopen(char *path, int mode /* mode is ignored */) | |
109 | { | |
110 | int dyld_result; | |
111 | NSObjectFileImage ofile; | |
112 | NSModule handle = NULL; | |
113 | ||
114 | dyld_result = NSCreateObjectFileImageFromFile(path, &ofile); | |
115 | if (dyld_result != NSObjectFileImageSuccess) | |
116 | TranslateError(path, OFImage, dyld_result); | |
117 | else | |
118 | { | |
119 | // NSLinkModule will cause the run to abort on any link error's | |
120 | // not very friendly but the error recovery functionality is limited. | |
121 | handle = NSLinkModule(ofile, path, TRUE); | |
122 | } | |
123 | ||
124 | return handle; | |
125 | } | |
126 | ||
127 | void * | |
128 | dlsym(handle, symbol) | |
129 | void *handle; | |
130 | char *symbol; | |
131 | { | |
132 | void *addr; | |
133 | ||
134 | if (NSIsSymbolNameDefined(symbol)) | |
135 | addr = NSAddressOfSymbol(NSLookupAndBindSymbol(symbol)); | |
136 | else | |
137 | addr = NULL; | |
138 | ||
139 | return addr; | |
140 | } | |
141 | ||
142 | #else /* NS_TARGET_MAJOR <= 3 */ | |
143 | ||
144 | static NXStream *OpenError(void) | |
a0d0e21e LW |
145 | { |
146 | return NXOpenMemory( (char *) 0, 0, NX_WRITEONLY); | |
147 | } | |
148 | ||
d6bcbf1c | 149 | static void TransferError(NXStream *s) |
a0d0e21e LW |
150 | { |
151 | char *buffer; | |
152 | int len, maxlen; | |
153 | ||
154 | if ( dl_last_error ) { | |
8c52afec | 155 | Safefree(dl_last_error); |
a0d0e21e LW |
156 | } |
157 | NXGetMemoryBuffer(s, &buffer, &len, &maxlen); | |
8c52afec | 158 | New(1097, dl_last_error, len, char); |
a0d0e21e LW |
159 | strcpy(dl_last_error, buffer); |
160 | } | |
161 | ||
d6bcbf1c | 162 | static void CloseError(NXStream *s) |
a0d0e21e LW |
163 | { |
164 | if ( s ) { | |
165 | NXCloseMemory( s, NX_FREEBUFFER); | |
166 | } | |
167 | } | |
168 | ||
d6bcbf1c | 169 | static char *dlopen(char *path, int mode /* mode is ignored */) |
a0d0e21e LW |
170 | { |
171 | int rld_success; | |
8e07c86e | 172 | NXStream *nxerr; |
a0d0e21e LW |
173 | I32 i, psize; |
174 | char *result; | |
175 | char **p; | |
2d8e6c8d | 176 | STRLEN n_a; |
8e07c86e AD |
177 | |
178 | /* Do not load what is already loaded into this process */ | |
179 | if (hv_fetch(dl_loaded_files, path, strlen(path), 0)) | |
180 | return path; | |
a0d0e21e | 181 | |
8e07c86e AD |
182 | nxerr = OpenError(); |
183 | psize = AvFILL(dl_resolve_using) + 3; | |
a0d0e21e LW |
184 | p = (char **) safemalloc(psize * sizeof(char*)); |
185 | p[0] = path; | |
186 | for(i=1; i<psize-1; i++) { | |
2d8e6c8d | 187 | p[i] = SvPVx(*av_fetch(dl_resolve_using, i-1, TRUE), n_a); |
a0d0e21e LW |
188 | } |
189 | p[psize-1] = 0; | |
190 | rld_success = rld_load(nxerr, (struct mach_header **)0, p, | |
191 | (const char *) 0); | |
192 | safefree((char*) p); | |
193 | if (rld_success) { | |
194 | result = path; | |
8e07c86e | 195 | /* prevent multiple loads of same file into same process */ |
3280af22 | 196 | hv_store(dl_loaded_files, path, strlen(path), &PL_sv_yes, 0); |
a0d0e21e LW |
197 | } else { |
198 | TransferError(nxerr); | |
199 | result = (char*) 0; | |
200 | } | |
201 | CloseError(nxerr); | |
202 | return result; | |
203 | } | |
204 | ||
a0d0e21e LW |
205 | void * |
206 | dlsym(handle, symbol) | |
207 | void *handle; | |
208 | char *symbol; | |
209 | { | |
210 | NXStream *nxerr = OpenError(); | |
a0d0e21e LW |
211 | unsigned long symref = 0; |
212 | ||
89475926 | 213 | if (!rld_lookup(nxerr, form("_%s", symbol), &symref)) |
a0d0e21e | 214 | TransferError(nxerr); |
a0d0e21e LW |
215 | CloseError(nxerr); |
216 | return (void*) symref; | |
217 | } | |
218 | ||
d6bcbf1c | 219 | #endif /* NS_TARGET_MAJOR >= 4 */ |
220 | ||
a0d0e21e LW |
221 | |
222 | /* ----- code from dl_dlopen.xs below here ----- */ | |
223 | ||
224 | ||
225 | static void | |
cea2e8a9 | 226 | dl_private_init(pTHX) |
a0d0e21e | 227 | { |
cea2e8a9 GS |
228 | (void)dl_generic_private_init(aTHX); |
229 | dl_resolve_using = get_av("DynaLoader::dl_resolve_using", 0x4); | |
a0d0e21e LW |
230 | } |
231 | ||
232 | MODULE = DynaLoader PACKAGE = DynaLoader | |
233 | ||
234 | BOOT: | |
cea2e8a9 | 235 | (void)dl_private_init(aTHX); |
a0d0e21e LW |
236 | |
237 | ||
238 | ||
239 | void * | |
ff7f3c60 | 240 | dl_load_file(filename, flags=0) |
a0d0e21e | 241 | char * filename |
ff7f3c60 NIS |
242 | int flags |
243 | PREINIT: | |
a0d0e21e | 244 | int mode = 1; |
ff7f3c60 NIS |
245 | CODE: |
246 | DLDEBUG(1,PerlIO_printf(PerlIO_stderr(), "dl_load_file(%s,%x):\n", filename,flags)); | |
247 | if (flags & 0x01) | |
cea2e8a9 | 248 | Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); |
a0d0e21e | 249 | RETVAL = dlopen(filename, mode) ; |
760ac839 | 250 | DLDEBUG(2,PerlIO_printf(PerlIO_stderr(), " libref=%x\n", RETVAL)); |
a0d0e21e LW |
251 | ST(0) = sv_newmortal() ; |
252 | if (RETVAL == NULL) | |
cea2e8a9 | 253 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e LW |
254 | else |
255 | sv_setiv( ST(0), (IV)RETVAL); | |
256 | ||
257 | ||
258 | void * | |
259 | dl_find_symbol(libhandle, symbolname) | |
260 | void * libhandle | |
261 | char * symbolname | |
262 | CODE: | |
d6bcbf1c | 263 | #if NS_TARGET_MAJOR >= 4 |
46fc3d4c | 264 | symbolname = form("_%s", symbolname); |
d6bcbf1c | 265 | #endif |
46fc3d4c | 266 | DLDEBUG(2, PerlIO_printf(PerlIO_stderr(), |
267 | "dl_find_symbol(handle=%lx, symbol=%s)\n", | |
268 | (unsigned long) libhandle, symbolname)); | |
a0d0e21e | 269 | RETVAL = dlsym(libhandle, symbolname); |
46fc3d4c | 270 | DLDEBUG(2, PerlIO_printf(PerlIO_stderr(), |
271 | " symbolref = %lx\n", (unsigned long) RETVAL)); | |
a0d0e21e LW |
272 | ST(0) = sv_newmortal() ; |
273 | if (RETVAL == NULL) | |
cea2e8a9 | 274 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e LW |
275 | else |
276 | sv_setiv( ST(0), (IV)RETVAL); | |
277 | ||
278 | ||
279 | void | |
280 | dl_undef_symbols() | |
281 | PPCODE: | |
282 | ||
283 | ||
284 | ||
285 | # These functions should not need changing on any platform: | |
286 | ||
287 | void | |
288 | dl_install_xsub(perl_name, symref, filename="$Package") | |
289 | char * perl_name | |
290 | void * symref | |
291 | char * filename | |
292 | CODE: | |
760ac839 | 293 | DLDEBUG(2,PerlIO_printf(PerlIO_stderr(), "dl_install_xsub(name=%s, symref=%x)\n", |
a0d0e21e | 294 | perl_name, symref)); |
cea2e8a9 GS |
295 | ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, |
296 | (void(*)(pTHX_ CV *))symref, | |
297 | filename))); | |
a0d0e21e LW |
298 | |
299 | ||
300 | char * | |
301 | dl_error() | |
302 | CODE: | |
303 | RETVAL = LastError ; | |
304 | OUTPUT: | |
305 | RETVAL | |
306 | ||
307 | # end. |