Commit | Line | Data |
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f556e5b9 | 1 | /* dl_dyld.xs |
8f1f23e8 | 2 | * |
f556e5b9 JH |
3 | * Platform: Darwin (Mac OS) |
4 | * Author: Wilfredo Sanchez <wsanchez@apple.com> | |
8f1f23e8 W |
5 | * Based on: dl_next.xs by Paul Marquess |
6 | * Based on: dl_dlopen.xs by Anno Siegel | |
7 | * Created: Aug 15th, 1994 | |
8 | * | |
9 | */ | |
10 | ||
11 | /* | |
12 | And Gandalf said: 'Many folk like to know beforehand what is to | |
13 | be set on the table; but those who have laboured to prepare the | |
14 | feast like to keep their secret; for wonder makes the words of | |
15 | praise louder.' | |
16 | */ | |
17 | ||
18 | /* Porting notes: | |
19 | ||
f556e5b9 JH |
20 | dl_dyld.xs is based on dl_next.xs by Anno Siegel. |
21 | ||
22 | dl_next.xs is in turn a port from dl_dlopen.xs by Paul Marquess. It | |
8f1f23e8 W |
23 | should not be used as a base for further ports though it may be used |
24 | as an example for how dl_dlopen.xs can be ported to other platforms. | |
25 | ||
26 | The method used here is just to supply the sun style dlopen etc. | |
f556e5b9 JH |
27 | functions in terms of NeXT's/Apple's dyld. The xs code proper is |
28 | unchanged from Paul's original. | |
8f1f23e8 W |
29 | |
30 | The port could use some streamlining. For one, error handling could | |
31 | be simplified. | |
32 | ||
f556e5b9 JH |
33 | This should be useable as a replacement for dl_next.xs, but it has not |
34 | been tested on NeXT platforms. | |
35 | ||
36 | Wilfredo Sanchez | |
8f1f23e8 W |
37 | |
38 | */ | |
39 | ||
40 | #include "EXTERN.h" | |
41 | #include "perl.h" | |
42 | #include "XSUB.h" | |
43 | ||
44 | #define DL_LOADONCEONLY | |
45 | ||
46 | #include "dlutils.c" /* SaveError() etc */ | |
47 | ||
48 | #undef environ | |
f556e5b9 | 49 | #undef bool |
8f1f23e8 W |
50 | #import <mach-o/dyld.h> |
51 | ||
52 | static char * dl_last_error = (char *) 0; | |
53 | static AV *dl_resolve_using = Nullav; | |
54 | ||
55 | static char *dlerror() | |
56 | { | |
57 | return dl_last_error; | |
58 | } | |
59 | ||
60 | int dlclose(handle) /* stub only */ | |
61 | void *handle; | |
62 | { | |
63 | return 0; | |
64 | } | |
65 | ||
66 | enum dyldErrorSource | |
67 | { | |
68 | OFImage, | |
69 | }; | |
70 | ||
71 | static void TranslateError | |
72 | (const char *path, enum dyldErrorSource type, int number) | |
73 | { | |
5b877257 | 74 | dTHX; |
8f1f23e8 W |
75 | char *error; |
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 | ||
89 | switch (type) | |
90 | { | |
91 | case OFImage: | |
92 | index = number; | |
93 | if (index > NUM_OFI_ERRORS - 1) | |
94 | index = NUM_OFI_ERRORS - 1; | |
7a3f2258 | 95 | error = Perl_form_nocontext(OFIErrorStrings[index], path, number); |
8f1f23e8 W |
96 | break; |
97 | ||
98 | default: | |
7a3f2258 | 99 | error = Perl_form_nocontext("%s(%d): Totally unknown error type %d\n", |
8f1f23e8 W |
100 | path, number, type); |
101 | break; | |
102 | } | |
103 | safefree(dl_last_error); | |
104 | dl_last_error = savepv(error); | |
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 | ||
142 | ||
143 | /* ----- code from dl_dlopen.xs below here ----- */ | |
144 | ||
145 | ||
146 | static void | |
cea2e8a9 | 147 | dl_private_init(pTHX) |
8f1f23e8 | 148 | { |
cea2e8a9 | 149 | (void)dl_generic_private_init(aTHX); |
a7a8d5a9 | 150 | dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI); |
8f1f23e8 W |
151 | } |
152 | ||
153 | MODULE = DynaLoader PACKAGE = DynaLoader | |
154 | ||
155 | BOOT: | |
cea2e8a9 | 156 | (void)dl_private_init(aTHX); |
8f1f23e8 W |
157 | |
158 | ||
159 | ||
160 | void * | |
161 | dl_load_file(filename, flags=0) | |
162 | char * filename | |
163 | int flags | |
164 | PREINIT: | |
165 | int mode = 1; | |
166 | CODE: | |
bf49b057 | 167 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); |
8f1f23e8 | 168 | if (flags & 0x01) |
cea2e8a9 | 169 | Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); |
8f1f23e8 | 170 | RETVAL = dlopen(filename, mode) ; |
bf49b057 | 171 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL)); |
8f1f23e8 W |
172 | ST(0) = sv_newmortal() ; |
173 | if (RETVAL == NULL) | |
cea2e8a9 | 174 | SaveError(aTHX_ "%s",dlerror()) ; |
8f1f23e8 | 175 | else |
3175b8cd | 176 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
8f1f23e8 W |
177 | |
178 | ||
179 | void * | |
180 | dl_find_symbol(libhandle, symbolname) | |
181 | void * libhandle | |
182 | char * symbolname | |
183 | CODE: | |
7a3f2258 | 184 | symbolname = Perl_form_nocontext("_%s", symbolname); |
bf49b057 | 185 | DLDEBUG(2, PerlIO_printf(Perl_debug_log, |
8f1f23e8 W |
186 | "dl_find_symbol(handle=%lx, symbol=%s)\n", |
187 | (unsigned long) libhandle, symbolname)); | |
188 | RETVAL = dlsym(libhandle, symbolname); | |
bf49b057 | 189 | DLDEBUG(2, PerlIO_printf(Perl_debug_log, |
8f1f23e8 W |
190 | " symbolref = %lx\n", (unsigned long) RETVAL)); |
191 | ST(0) = sv_newmortal() ; | |
192 | if (RETVAL == NULL) | |
cea2e8a9 | 193 | SaveError(aTHX_ "%s",dlerror()) ; |
8f1f23e8 | 194 | else |
3175b8cd | 195 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
8f1f23e8 W |
196 | |
197 | ||
198 | void | |
199 | dl_undef_symbols() | |
200 | PPCODE: | |
201 | ||
202 | ||
203 | ||
204 | # These functions should not need changing on any platform: | |
205 | ||
206 | void | |
207 | dl_install_xsub(perl_name, symref, filename="$Package") | |
208 | char * perl_name | |
209 | void * symref | |
210 | char * filename | |
211 | CODE: | |
bf49b057 | 212 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", |
8f1f23e8 | 213 | perl_name, symref)); |
cea2e8a9 GS |
214 | ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, |
215 | (void(*)(pTHX_ CV *))symref, | |
216 | filename))); | |
8f1f23e8 W |
217 | |
218 | ||
219 | char * | |
220 | dl_error() | |
221 | CODE: | |
222 | RETVAL = LastError ; | |
223 | OUTPUT: | |
224 | RETVAL | |
225 | ||
f556e5b9 | 226 | # end. |