Commit | Line | Data |
a0d0e21e |
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 |
36 | /* include these before perl headers */ |
37 | #include <mach-o/rld.h> |
38 | #include <streams/streams.h> |
d6bcbf1c |
39 | #endif |
8e07c86e |
40 | |
a0d0e21e |
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 |
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 |
145 | { |
146 | return NXOpenMemory( (char *) 0, 0, NX_WRITEONLY); |
147 | } |
148 | |
d6bcbf1c |
149 | static void TransferError(NXStream *s) |
a0d0e21e |
150 | { |
151 | char *buffer; |
152 | int len, maxlen; |
153 | |
154 | if ( dl_last_error ) { |
8c52afec |
155 | Safefree(dl_last_error); |
a0d0e21e |
156 | } |
157 | NXGetMemoryBuffer(s, &buffer, &len, &maxlen); |
8c52afec |
158 | New(1097, dl_last_error, len, char); |
a0d0e21e |
159 | strcpy(dl_last_error, buffer); |
160 | } |
161 | |
d6bcbf1c |
162 | static void CloseError(NXStream *s) |
a0d0e21e |
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 |
170 | { |
171 | int rld_success; |
8e07c86e |
172 | NXStream *nxerr; |
a0d0e21e |
173 | I32 i, psize; |
174 | char *result; |
175 | char **p; |
2d8e6c8d |
176 | STRLEN n_a; |
8e07c86e |
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 |
182 | nxerr = OpenError(); |
183 | psize = AvFILL(dl_resolve_using) + 3; |
a0d0e21e |
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 |
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 |
197 | } else { |
198 | TransferError(nxerr); |
199 | result = (char*) 0; |
200 | } |
201 | CloseError(nxerr); |
202 | return result; |
203 | } |
204 | |
a0d0e21e |
205 | void * |
206 | dlsym(handle, symbol) |
207 | void *handle; |
208 | char *symbol; |
209 | { |
210 | NXStream *nxerr = OpenError(); |
a0d0e21e |
211 | unsigned long symref = 0; |
212 | |
89475926 |
213 | if (!rld_lookup(nxerr, form("_%s", symbol), &symref)) |
a0d0e21e |
214 | TransferError(nxerr); |
a0d0e21e |
215 | CloseError(nxerr); |
216 | return (void*) symref; |
217 | } |
218 | |
d6bcbf1c |
219 | #endif /* NS_TARGET_MAJOR >= 4 */ |
220 | |
a0d0e21e |
221 | |
222 | /* ----- code from dl_dlopen.xs below here ----- */ |
223 | |
224 | |
225 | static void |
cea2e8a9 |
226 | dl_private_init(pTHX) |
a0d0e21e |
227 | { |
cea2e8a9 |
228 | (void)dl_generic_private_init(aTHX); |
229 | dl_resolve_using = get_av("DynaLoader::dl_resolve_using", 0x4); |
a0d0e21e |
230 | } |
231 | |
232 | MODULE = DynaLoader PACKAGE = DynaLoader |
233 | |
234 | BOOT: |
cea2e8a9 |
235 | (void)dl_private_init(aTHX); |
a0d0e21e |
236 | |
237 | |
238 | |
239 | void * |
ff7f3c60 |
240 | dl_load_file(filename, flags=0) |
a0d0e21e |
241 | char * filename |
ff7f3c60 |
242 | int flags |
243 | PREINIT: |
a0d0e21e |
244 | int mode = 1; |
ff7f3c60 |
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 |
251 | ST(0) = sv_newmortal() ; |
252 | if (RETVAL == NULL) |
cea2e8a9 |
253 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e |
254 | else |
3175b8cd |
255 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
a0d0e21e |
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 |
272 | ST(0) = sv_newmortal() ; |
273 | if (RETVAL == NULL) |
cea2e8a9 |
274 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e |
275 | else |
3175b8cd |
276 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
a0d0e21e |
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 |
295 | ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, |
296 | (void(*)(pTHX_ CV *))symref, |
297 | filename))); |
a0d0e21e |
298 | |
299 | |
300 | char * |
301 | dl_error() |
302 | CODE: |
303 | RETVAL = LastError ; |
304 | OUTPUT: |
305 | RETVAL |
306 | |
307 | # end. |