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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 | |
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34 | #if NS_TARGET_MAJOR >= 4 |
35 | #else |
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36 | /* include these before perl headers */ |
37 | #include <mach-o/rld.h> |
38 | #include <streams/streams.h> |
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39 | #endif |
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40 | |
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41 | #include "EXTERN.h" |
42 | #include "perl.h" |
43 | #include "XSUB.h" |
44 | |
8e07c86e |
45 | #define DL_LOADONCEONLY |
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46 | |
8e07c86e |
47 | #include "dlutils.c" /* SaveError() etc */ |
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48 | |
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49 | |
50 | static char * dl_last_error = (char *) 0; |
8e07c86e |
51 | static AV *dl_resolve_using = Nullav; |
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52 | |
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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 | { |
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75 | char *error; |
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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 | |
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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 | } |
46fc3d4c |
103 | safefree(dl_last_error); |
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) |
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144 | { |
145 | return NXOpenMemory( (char *) 0, 0, NX_WRITEONLY); |
146 | } |
147 | |
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148 | static void TransferError(NXStream *s) |
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149 | { |
150 | char *buffer; |
151 | int len, maxlen; |
152 | |
153 | if ( dl_last_error ) { |
154 | safefree(dl_last_error); |
155 | } |
156 | NXGetMemoryBuffer(s, &buffer, &len, &maxlen); |
157 | dl_last_error = safemalloc(len); |
158 | strcpy(dl_last_error, buffer); |
159 | } |
160 | |
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161 | static void CloseError(NXStream *s) |
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162 | { |
163 | if ( s ) { |
164 | NXCloseMemory( s, NX_FREEBUFFER); |
165 | } |
166 | } |
167 | |
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168 | static char *dlopen(char *path, int mode /* mode is ignored */) |
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169 | { |
170 | int rld_success; |
8e07c86e |
171 | NXStream *nxerr; |
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172 | I32 i, psize; |
173 | char *result; |
174 | char **p; |
8e07c86e |
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; |
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179 | |
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180 | nxerr = OpenError(); |
181 | psize = AvFILL(dl_resolve_using) + 3; |
a0d0e21e |
182 | p = (char **) safemalloc(psize * sizeof(char*)); |
183 | p[0] = path; |
184 | for(i=1; i<psize-1; i++) { |
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185 | p[i] = SvPVx(*av_fetch(dl_resolve_using, i-1, TRUE), na); |
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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; |
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193 | /* prevent multiple loads of same file into same process */ |
194 | hv_store(dl_loaded_files, path, strlen(path), &sv_yes, 0); |
a0d0e21e |
195 | } else { |
196 | TransferError(nxerr); |
197 | result = (char*) 0; |
198 | } |
199 | CloseError(nxerr); |
200 | return result; |
201 | } |
202 | |
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203 | void * |
204 | dlsym(handle, symbol) |
205 | void *handle; |
206 | char *symbol; |
207 | { |
208 | NXStream *nxerr = OpenError(); |
a0d0e21e |
209 | unsigned long symref = 0; |
210 | |
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211 | if (!rld_lookup(nxerr, form("_%s", symbuf), &symref)) |
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212 | TransferError(nxerr); |
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213 | CloseError(nxerr); |
214 | return (void*) symref; |
215 | } |
216 | |
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217 | #endif /* NS_TARGET_MAJOR >= 4 */ |
218 | |
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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(); |
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227 | dl_resolve_using = perl_get_av("DynaLoader::dl_resolve_using", 0x4); |
a0d0e21e |
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) |
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239 | char * filename |
ff7f3c60 |
240 | int flags |
241 | PREINIT: |
a0d0e21e |
242 | int mode = 1; |
ff7f3c60 |
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); |
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247 | RETVAL = dlopen(filename, mode) ; |
760ac839 |
248 | DLDEBUG(2,PerlIO_printf(PerlIO_stderr(), " libref=%x\n", RETVAL)); |
a0d0e21e |
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); |
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263 | #endif |
46fc3d4c |
264 | DLDEBUG(2, PerlIO_printf(PerlIO_stderr(), |
265 | "dl_find_symbol(handle=%lx, symbol=%s)\n", |
266 | (unsigned long) libhandle, symbolname)); |
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267 | RETVAL = dlsym(libhandle, symbolname); |
46fc3d4c |
268 | DLDEBUG(2, PerlIO_printf(PerlIO_stderr(), |
269 | " symbolref = %lx\n", (unsigned long) RETVAL)); |
a0d0e21e |
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", |
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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. |