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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 | { | |
46fc3d4c | 75 | char *error; |
d6bcbf1c | 76 | unsigned int index; |
77 | static char *OFIErrorStrings[] = | |
78 | { | |
79 | "%s(%d): Object Image Load Failure\n", | |
80 | "%s(%d): Object Image Load Success\n", | |
81 | "%s(%d): Not an recognisable object file\n", | |
82 | "%s(%d): No valid architecture\n", | |
83 | "%s(%d): Object image has an invalid format\n", | |
84 | "%s(%d): Invalid access (permissions?)\n", | |
85 | "%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n", | |
86 | }; | |
87 | #define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0])) | |
88 | ||
d6bcbf1c | 89 | switch (type) |
90 | { | |
91 | case OFImage: | |
92 | index = number; | |
93 | if (index > NUM_OFI_ERRORS - 1) | |
94 | index = NUM_OFI_ERRORS - 1; | |
46fc3d4c | 95 | error = form(OFIErrorStrings[index], path, number); |
d6bcbf1c | 96 | break; |
97 | ||
98 | default: | |
46fc3d4c | 99 | error = form("%s(%d): Totally unknown error type %d\n", |
100 | path, number, type); | |
d6bcbf1c | 101 | break; |
102 | } | |
8c52afec | 103 | Safefree(dl_last_error); |
46fc3d4c | 104 | dl_last_error = savepv(error); |
d6bcbf1c | 105 | } |
106 | ||
107 | static char *dlopen(char *path, int mode /* mode is ignored */) | |
108 | { | |
109 | int dyld_result; | |
110 | NSObjectFileImage ofile; | |
111 | NSModule handle = NULL; | |
112 | ||
113 | dyld_result = NSCreateObjectFileImageFromFile(path, &ofile); | |
114 | if (dyld_result != NSObjectFileImageSuccess) | |
115 | TranslateError(path, OFImage, dyld_result); | |
116 | else | |
117 | { | |
118 | // NSLinkModule will cause the run to abort on any link error's | |
119 | // not very friendly but the error recovery functionality is limited. | |
120 | handle = NSLinkModule(ofile, path, TRUE); | |
121 | } | |
122 | ||
123 | return handle; | |
124 | } | |
125 | ||
126 | void * | |
127 | dlsym(handle, symbol) | |
128 | void *handle; | |
129 | char *symbol; | |
130 | { | |
131 | void *addr; | |
132 | ||
133 | if (NSIsSymbolNameDefined(symbol)) | |
134 | addr = NSAddressOfSymbol(NSLookupAndBindSymbol(symbol)); | |
135 | else | |
136 | addr = NULL; | |
137 | ||
138 | return addr; | |
139 | } | |
140 | ||
141 | #else /* NS_TARGET_MAJOR <= 3 */ | |
142 | ||
143 | static NXStream *OpenError(void) | |
a0d0e21e LW |
144 | { |
145 | return NXOpenMemory( (char *) 0, 0, NX_WRITEONLY); | |
146 | } | |
147 | ||
d6bcbf1c | 148 | static void TransferError(NXStream *s) |
a0d0e21e LW |
149 | { |
150 | char *buffer; | |
151 | int len, maxlen; | |
152 | ||
153 | if ( dl_last_error ) { | |
8c52afec | 154 | Safefree(dl_last_error); |
a0d0e21e LW |
155 | } |
156 | NXGetMemoryBuffer(s, &buffer, &len, &maxlen); | |
8c52afec | 157 | New(1097, dl_last_error, len, char); |
a0d0e21e LW |
158 | strcpy(dl_last_error, buffer); |
159 | } | |
160 | ||
d6bcbf1c | 161 | static void CloseError(NXStream *s) |
a0d0e21e LW |
162 | { |
163 | if ( s ) { | |
164 | NXCloseMemory( s, NX_FREEBUFFER); | |
165 | } | |
166 | } | |
167 | ||
d6bcbf1c | 168 | static char *dlopen(char *path, int mode /* mode is ignored */) |
a0d0e21e LW |
169 | { |
170 | int rld_success; | |
8e07c86e | 171 | NXStream *nxerr; |
a0d0e21e LW |
172 | I32 i, psize; |
173 | char *result; | |
174 | char **p; | |
8e07c86e AD |
175 | |
176 | /* Do not load what is already loaded into this process */ | |
177 | if (hv_fetch(dl_loaded_files, path, strlen(path), 0)) | |
178 | return path; | |
a0d0e21e | 179 | |
8e07c86e AD |
180 | nxerr = OpenError(); |
181 | psize = AvFILL(dl_resolve_using) + 3; | |
a0d0e21e LW |
182 | p = (char **) safemalloc(psize * sizeof(char*)); |
183 | p[0] = path; | |
184 | for(i=1; i<psize-1; i++) { | |
6b88bc9c | 185 | p[i] = SvPVx(*av_fetch(dl_resolve_using, i-1, TRUE), PL_na); |
a0d0e21e LW |
186 | } |
187 | p[psize-1] = 0; | |
188 | rld_success = rld_load(nxerr, (struct mach_header **)0, p, | |
189 | (const char *) 0); | |
190 | safefree((char*) p); | |
191 | if (rld_success) { | |
192 | result = path; | |
8e07c86e | 193 | /* prevent multiple loads of same file into same process */ |
3280af22 | 194 | hv_store(dl_loaded_files, path, strlen(path), &PL_sv_yes, 0); |
a0d0e21e LW |
195 | } else { |
196 | TransferError(nxerr); | |
197 | result = (char*) 0; | |
198 | } | |
199 | CloseError(nxerr); | |
200 | return result; | |
201 | } | |
202 | ||
a0d0e21e LW |
203 | void * |
204 | dlsym(handle, symbol) | |
205 | void *handle; | |
206 | char *symbol; | |
207 | { | |
208 | NXStream *nxerr = OpenError(); | |
a0d0e21e LW |
209 | unsigned long symref = 0; |
210 | ||
89475926 | 211 | if (!rld_lookup(nxerr, form("_%s", symbol), &symref)) |
a0d0e21e | 212 | TransferError(nxerr); |
a0d0e21e LW |
213 | CloseError(nxerr); |
214 | return (void*) symref; | |
215 | } | |
216 | ||
d6bcbf1c | 217 | #endif /* NS_TARGET_MAJOR >= 4 */ |
218 | ||
a0d0e21e LW |
219 | |
220 | /* ----- code from dl_dlopen.xs below here ----- */ | |
221 | ||
222 | ||
223 | static void | |
224 | dl_private_init() | |
225 | { | |
226 | (void)dl_generic_private_init(); | |
8e07c86e | 227 | dl_resolve_using = perl_get_av("DynaLoader::dl_resolve_using", 0x4); |
a0d0e21e LW |
228 | } |
229 | ||
230 | MODULE = DynaLoader PACKAGE = DynaLoader | |
231 | ||
232 | BOOT: | |
233 | (void)dl_private_init(); | |
234 | ||
235 | ||
236 | ||
237 | void * | |
ff7f3c60 | 238 | dl_load_file(filename, flags=0) |
a0d0e21e | 239 | char * filename |
ff7f3c60 NIS |
240 | int flags |
241 | PREINIT: | |
a0d0e21e | 242 | int mode = 1; |
ff7f3c60 NIS |
243 | CODE: |
244 | DLDEBUG(1,PerlIO_printf(PerlIO_stderr(), "dl_load_file(%s,%x):\n", filename,flags)); | |
245 | if (flags & 0x01) | |
246 | warn("Can't make loaded symbols global on this platform while loading %s",filename); | |
a0d0e21e | 247 | RETVAL = dlopen(filename, mode) ; |
760ac839 | 248 | DLDEBUG(2,PerlIO_printf(PerlIO_stderr(), " libref=%x\n", RETVAL)); |
a0d0e21e LW |
249 | ST(0) = sv_newmortal() ; |
250 | if (RETVAL == NULL) | |
251 | SaveError("%s",dlerror()) ; | |
252 | else | |
253 | sv_setiv( ST(0), (IV)RETVAL); | |
254 | ||
255 | ||
256 | void * | |
257 | dl_find_symbol(libhandle, symbolname) | |
258 | void * libhandle | |
259 | char * symbolname | |
260 | CODE: | |
d6bcbf1c | 261 | #if NS_TARGET_MAJOR >= 4 |
46fc3d4c | 262 | symbolname = form("_%s", symbolname); |
d6bcbf1c | 263 | #endif |
46fc3d4c | 264 | DLDEBUG(2, PerlIO_printf(PerlIO_stderr(), |
265 | "dl_find_symbol(handle=%lx, symbol=%s)\n", | |
266 | (unsigned long) libhandle, symbolname)); | |
a0d0e21e | 267 | RETVAL = dlsym(libhandle, symbolname); |
46fc3d4c | 268 | DLDEBUG(2, PerlIO_printf(PerlIO_stderr(), |
269 | " symbolref = %lx\n", (unsigned long) RETVAL)); | |
a0d0e21e LW |
270 | ST(0) = sv_newmortal() ; |
271 | if (RETVAL == NULL) | |
272 | SaveError("%s",dlerror()) ; | |
273 | else | |
274 | sv_setiv( ST(0), (IV)RETVAL); | |
275 | ||
276 | ||
277 | void | |
278 | dl_undef_symbols() | |
279 | PPCODE: | |
280 | ||
281 | ||
282 | ||
283 | # These functions should not need changing on any platform: | |
284 | ||
285 | void | |
286 | dl_install_xsub(perl_name, symref, filename="$Package") | |
287 | char * perl_name | |
288 | void * symref | |
289 | char * filename | |
290 | CODE: | |
760ac839 | 291 | DLDEBUG(2,PerlIO_printf(PerlIO_stderr(), "dl_install_xsub(name=%s, symref=%x)\n", |
a0d0e21e LW |
292 | perl_name, symref)); |
293 | ST(0)=sv_2mortal(newRV((SV*)newXS(perl_name, (void(*)())symref, filename))); | |
294 | ||
295 | ||
296 | char * | |
297 | dl_error() | |
298 | CODE: | |
299 | RETVAL = LastError ; | |
300 | OUTPUT: | |
301 | RETVAL | |
302 | ||
303 | # end. |