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1 | /* dl_dyld.xs |
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2 | * |
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3 | * Platform: Darwin (Mac OS) |
4 | * Author: Wilfredo Sanchez <wsanchez@apple.com> |
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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 | |
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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 |
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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. |
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27 | functions in terms of NeXT's/Apple's dyld. The xs code proper is |
28 | unchanged from Paul's original. |
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29 | |
30 | The port could use some streamlining. For one, error handling could |
31 | be simplified. |
32 | |
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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 |
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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 |
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49 | #undef bool |
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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 | { |
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74 | dTHX; |
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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; |
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95 | error = Perl_form_nocontext(OFIErrorStrings[index], path, number); |
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96 | break; |
97 | |
98 | default: |
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99 | error = Perl_form_nocontext("%s(%d): Totally unknown error type %d\n", |
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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 |
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147 | dl_private_init(pTHX) |
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148 | { |
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149 | (void)dl_generic_private_init(aTHX); |
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150 | dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI); |
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151 | } |
152 | |
153 | MODULE = DynaLoader PACKAGE = DynaLoader |
154 | |
155 | BOOT: |
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156 | (void)dl_private_init(aTHX); |
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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: |
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167 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); |
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168 | if (flags & 0x01) |
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169 | Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); |
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170 | RETVAL = dlopen(filename, mode) ; |
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171 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL)); |
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172 | ST(0) = sv_newmortal() ; |
173 | if (RETVAL == NULL) |
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174 | SaveError(aTHX_ "%s",dlerror()) ; |
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175 | else |
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176 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
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177 | |
178 | |
179 | void * |
180 | dl_find_symbol(libhandle, symbolname) |
181 | void * libhandle |
182 | char * symbolname |
183 | CODE: |
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184 | symbolname = Perl_form_nocontext("_%s", symbolname); |
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185 | DLDEBUG(2, PerlIO_printf(Perl_debug_log, |
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186 | "dl_find_symbol(handle=%lx, symbol=%s)\n", |
187 | (unsigned long) libhandle, symbolname)); |
188 | RETVAL = dlsym(libhandle, symbolname); |
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189 | DLDEBUG(2, PerlIO_printf(Perl_debug_log, |
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190 | " symbolref = %lx\n", (unsigned long) RETVAL)); |
191 | ST(0) = sv_newmortal() ; |
192 | if (RETVAL == NULL) |
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193 | SaveError(aTHX_ "%s",dlerror()) ; |
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194 | else |
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195 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
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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: |
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212 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", |
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213 | perl_name, symref)); |
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214 | ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, |
215 | (void(*)(pTHX_ CV *))symref, |
216 | filename))); |
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217 | |
218 | |
219 | char * |
220 | dl_error() |
221 | CODE: |
222 | RETVAL = LastError ; |
223 | OUTPUT: |
224 | RETVAL |
225 | |
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226 | # end. |