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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 | |
cdc73a10 |
47 | typedef struct { |
48 | AV * x_resolve_using; |
49 | } my_cxtx_t; /* this *must* be named my_cxtx_t */ |
a0d0e21e |
50 | |
cdc73a10 |
51 | #define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */ |
52 | #include "dlutils.c" /* SaveError() etc */ |
a0d0e21e |
53 | |
cdc73a10 |
54 | #define dl_resolve_using (dl_cxtx.x_resolve_using) |
a0d0e21e |
55 | |
d6bcbf1c |
56 | static char *dlerror() |
57 | { |
cdc73a10 |
58 | dTHX; |
59 | dMY_CXT; |
d6bcbf1c |
60 | return dl_last_error; |
61 | } |
62 | |
63 | int dlclose(handle) /* stub only */ |
64 | void *handle; |
65 | { |
66 | return 0; |
67 | } |
68 | |
69 | #if NS_TARGET_MAJOR >= 4 |
70 | #import <mach-o/dyld.h> |
71 | |
72 | enum dyldErrorSource |
73 | { |
74 | OFImage, |
75 | }; |
76 | |
77 | static void TranslateError |
78 | (const char *path, enum dyldErrorSource type, int number) |
79 | { |
5b877257 |
80 | dTHX; |
cdc73a10 |
81 | dMY_CXT; |
46fc3d4c |
82 | char *error; |
d6bcbf1c |
83 | unsigned int index; |
84 | static char *OFIErrorStrings[] = |
85 | { |
86 | "%s(%d): Object Image Load Failure\n", |
87 | "%s(%d): Object Image Load Success\n", |
d1be9408 |
88 | "%s(%d): Not a recognisable object file\n", |
d6bcbf1c |
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", |
93 | }; |
94 | #define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0])) |
95 | |
d6bcbf1c |
96 | switch (type) |
97 | { |
98 | case OFImage: |
99 | index = number; |
100 | if (index > NUM_OFI_ERRORS - 1) |
101 | index = NUM_OFI_ERRORS - 1; |
7a3f2258 |
102 | error = Perl_form_nocontext(OFIErrorStrings[index], path, number); |
d6bcbf1c |
103 | break; |
104 | |
105 | default: |
7a3f2258 |
106 | error = Perl_form_nocontext("%s(%d): Totally unknown error type %d\n", |
46fc3d4c |
107 | path, number, type); |
d6bcbf1c |
108 | break; |
109 | } |
8c52afec |
110 | Safefree(dl_last_error); |
46fc3d4c |
111 | dl_last_error = savepv(error); |
d6bcbf1c |
112 | } |
113 | |
114 | static char *dlopen(char *path, int mode /* mode is ignored */) |
115 | { |
116 | int dyld_result; |
117 | NSObjectFileImage ofile; |
118 | NSModule handle = NULL; |
119 | |
120 | dyld_result = NSCreateObjectFileImageFromFile(path, &ofile); |
121 | if (dyld_result != NSObjectFileImageSuccess) |
122 | TranslateError(path, OFImage, dyld_result); |
123 | else |
124 | { |
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); |
128 | } |
129 | |
130 | return handle; |
131 | } |
132 | |
133 | void * |
134 | dlsym(handle, symbol) |
135 | void *handle; |
136 | char *symbol; |
137 | { |
138 | void *addr; |
139 | |
140 | if (NSIsSymbolNameDefined(symbol)) |
141 | addr = NSAddressOfSymbol(NSLookupAndBindSymbol(symbol)); |
142 | else |
143 | addr = NULL; |
144 | |
145 | return addr; |
146 | } |
147 | |
148 | #else /* NS_TARGET_MAJOR <= 3 */ |
149 | |
150 | static NXStream *OpenError(void) |
a0d0e21e |
151 | { |
152 | return NXOpenMemory( (char *) 0, 0, NX_WRITEONLY); |
153 | } |
154 | |
d6bcbf1c |
155 | static void TransferError(NXStream *s) |
a0d0e21e |
156 | { |
157 | char *buffer; |
158 | int len, maxlen; |
ecdc15d9 |
159 | dTHX; |
cdc73a10 |
160 | dMY_CXT; |
a0d0e21e |
161 | |
162 | if ( dl_last_error ) { |
8c52afec |
163 | Safefree(dl_last_error); |
a0d0e21e |
164 | } |
165 | NXGetMemoryBuffer(s, &buffer, &len, &maxlen); |
a02a5408 |
166 | Newx(dl_last_error, len, char); |
a0d0e21e |
167 | strcpy(dl_last_error, buffer); |
168 | } |
169 | |
d6bcbf1c |
170 | static void CloseError(NXStream *s) |
a0d0e21e |
171 | { |
172 | if ( s ) { |
173 | NXCloseMemory( s, NX_FREEBUFFER); |
174 | } |
175 | } |
176 | |
d6bcbf1c |
177 | static char *dlopen(char *path, int mode /* mode is ignored */) |
a0d0e21e |
178 | { |
179 | int rld_success; |
8e07c86e |
180 | NXStream *nxerr; |
a0d0e21e |
181 | I32 i, psize; |
182 | char *result; |
183 | char **p; |
2d8e6c8d |
184 | STRLEN n_a; |
ecdc15d9 |
185 | dTHX; |
cdc73a10 |
186 | dMY_CXT; |
8e07c86e |
187 | |
188 | /* Do not load what is already loaded into this process */ |
189 | if (hv_fetch(dl_loaded_files, path, strlen(path), 0)) |
190 | return path; |
a0d0e21e |
191 | |
8e07c86e |
192 | nxerr = OpenError(); |
193 | psize = AvFILL(dl_resolve_using) + 3; |
a0d0e21e |
194 | p = (char **) safemalloc(psize * sizeof(char*)); |
195 | p[0] = path; |
196 | for(i=1; i<psize-1; i++) { |
2d8e6c8d |
197 | p[i] = SvPVx(*av_fetch(dl_resolve_using, i-1, TRUE), n_a); |
a0d0e21e |
198 | } |
199 | p[psize-1] = 0; |
200 | rld_success = rld_load(nxerr, (struct mach_header **)0, p, |
201 | (const char *) 0); |
202 | safefree((char*) p); |
203 | if (rld_success) { |
204 | result = path; |
8e07c86e |
205 | /* prevent multiple loads of same file into same process */ |
3280af22 |
206 | hv_store(dl_loaded_files, path, strlen(path), &PL_sv_yes, 0); |
a0d0e21e |
207 | } else { |
208 | TransferError(nxerr); |
209 | result = (char*) 0; |
210 | } |
211 | CloseError(nxerr); |
212 | return result; |
213 | } |
214 | |
a0d0e21e |
215 | void * |
216 | dlsym(handle, symbol) |
217 | void *handle; |
218 | char *symbol; |
219 | { |
220 | NXStream *nxerr = OpenError(); |
a0d0e21e |
221 | unsigned long symref = 0; |
222 | |
7a3f2258 |
223 | if (!rld_lookup(nxerr, Perl_form_nocontext("_%s", symbol), &symref)) |
a0d0e21e |
224 | TransferError(nxerr); |
a0d0e21e |
225 | CloseError(nxerr); |
226 | return (void*) symref; |
227 | } |
228 | |
d6bcbf1c |
229 | #endif /* NS_TARGET_MAJOR >= 4 */ |
230 | |
a0d0e21e |
231 | |
232 | /* ----- code from dl_dlopen.xs below here ----- */ |
233 | |
234 | |
235 | static void |
cea2e8a9 |
236 | dl_private_init(pTHX) |
a0d0e21e |
237 | { |
cea2e8a9 |
238 | (void)dl_generic_private_init(aTHX); |
cdc73a10 |
239 | { |
240 | dMY_CXT; |
241 | dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI); |
242 | } |
a0d0e21e |
243 | } |
244 | |
245 | MODULE = DynaLoader PACKAGE = DynaLoader |
246 | |
247 | BOOT: |
cea2e8a9 |
248 | (void)dl_private_init(aTHX); |
a0d0e21e |
249 | |
250 | |
251 | |
252 | void * |
ff7f3c60 |
253 | dl_load_file(filename, flags=0) |
a0d0e21e |
254 | char * filename |
ff7f3c60 |
255 | int flags |
256 | PREINIT: |
a0d0e21e |
257 | int mode = 1; |
ff7f3c60 |
258 | CODE: |
bf49b057 |
259 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); |
ff7f3c60 |
260 | if (flags & 0x01) |
cea2e8a9 |
261 | Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); |
a0d0e21e |
262 | RETVAL = dlopen(filename, mode) ; |
bf49b057 |
263 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL)); |
a0d0e21e |
264 | ST(0) = sv_newmortal() ; |
265 | if (RETVAL == NULL) |
cea2e8a9 |
266 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e |
267 | else |
3175b8cd |
268 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
a0d0e21e |
269 | |
270 | |
271 | void * |
272 | dl_find_symbol(libhandle, symbolname) |
273 | void * libhandle |
274 | char * symbolname |
275 | CODE: |
d6bcbf1c |
276 | #if NS_TARGET_MAJOR >= 4 |
7a3f2258 |
277 | symbolname = Perl_form_nocontext("_%s", symbolname); |
d6bcbf1c |
278 | #endif |
bf49b057 |
279 | DLDEBUG(2, PerlIO_printf(Perl_debug_log, |
46fc3d4c |
280 | "dl_find_symbol(handle=%lx, symbol=%s)\n", |
281 | (unsigned long) libhandle, symbolname)); |
a0d0e21e |
282 | RETVAL = dlsym(libhandle, symbolname); |
bf49b057 |
283 | DLDEBUG(2, PerlIO_printf(Perl_debug_log, |
46fc3d4c |
284 | " symbolref = %lx\n", (unsigned long) RETVAL)); |
a0d0e21e |
285 | ST(0) = sv_newmortal() ; |
286 | if (RETVAL == NULL) |
cea2e8a9 |
287 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e |
288 | else |
3175b8cd |
289 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
a0d0e21e |
290 | |
291 | |
292 | void |
293 | dl_undef_symbols() |
294 | PPCODE: |
295 | |
296 | |
297 | |
298 | # These functions should not need changing on any platform: |
299 | |
300 | void |
301 | dl_install_xsub(perl_name, symref, filename="$Package") |
302 | char * perl_name |
303 | void * symref |
304 | char * filename |
305 | CODE: |
bf49b057 |
306 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", |
a0d0e21e |
307 | perl_name, symref)); |
cea2e8a9 |
308 | ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, |
309 | (void(*)(pTHX_ CV *))symref, |
310 | filename))); |
a0d0e21e |
311 | |
312 | |
313 | char * |
314 | dl_error() |
315 | CODE: |
cdc73a10 |
316 | dMY_CXT; |
317 | RETVAL = dl_last_error ; |
a0d0e21e |
318 | OUTPUT: |
319 | RETVAL |
320 | |
321 | # end. |