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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 | |
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44 | #include "dlutils.c" /* for SaveError() etc */ |
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45 | |
46 | #undef environ |
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47 | #undef bool |
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48 | #import <mach-o/dyld.h> |
49 | |
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50 | static char *dlerror() |
51 | { |
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52 | dTHX; |
53 | dMY_CXT; |
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54 | return dl_last_error; |
55 | } |
56 | |
57 | int dlclose(handle) /* stub only */ |
58 | void *handle; |
59 | { |
60 | return 0; |
61 | } |
62 | |
63 | enum dyldErrorSource |
64 | { |
65 | OFImage, |
66 | }; |
67 | |
68 | static void TranslateError |
69 | (const char *path, enum dyldErrorSource type, int number) |
70 | { |
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71 | dTHX; |
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72 | dMY_CXT; |
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73 | char *error; |
74 | unsigned int index; |
75 | static char *OFIErrorStrings[] = |
76 | { |
77 | "%s(%d): Object Image Load Failure\n", |
78 | "%s(%d): Object Image Load Success\n", |
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79 | "%s(%d): Not a recognisable object file\n", |
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80 | "%s(%d): No valid architecture\n", |
81 | "%s(%d): Object image has an invalid format\n", |
82 | "%s(%d): Invalid access (permissions?)\n", |
83 | "%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n", |
84 | }; |
85 | #define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0])) |
86 | |
87 | switch (type) |
88 | { |
89 | case OFImage: |
90 | index = number; |
91 | if (index > NUM_OFI_ERRORS - 1) |
92 | index = NUM_OFI_ERRORS - 1; |
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93 | error = Perl_form_nocontext(OFIErrorStrings[index], path, number); |
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94 | break; |
95 | |
96 | default: |
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97 | error = Perl_form_nocontext("%s(%d): Totally unknown error type %d\n", |
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98 | path, number, type); |
99 | break; |
100 | } |
101 | safefree(dl_last_error); |
102 | dl_last_error = savepv(error); |
103 | } |
104 | |
105 | static char *dlopen(char *path, int mode /* mode is ignored */) |
106 | { |
107 | int dyld_result; |
108 | NSObjectFileImage ofile; |
109 | NSModule handle = NULL; |
110 | |
111 | dyld_result = NSCreateObjectFileImageFromFile(path, &ofile); |
112 | if (dyld_result != NSObjectFileImageSuccess) |
113 | TranslateError(path, OFImage, dyld_result); |
114 | else |
115 | { |
116 | // NSLinkModule will cause the run to abort on any link error's |
117 | // not very friendly but the error recovery functionality is limited. |
118 | handle = NSLinkModule(ofile, path, TRUE); |
119 | } |
120 | |
121 | return handle; |
122 | } |
123 | |
124 | void * |
125 | dlsym(handle, symbol) |
126 | void *handle; |
127 | char *symbol; |
128 | { |
129 | void *addr; |
130 | |
131 | if (NSIsSymbolNameDefined(symbol)) |
132 | addr = NSAddressOfSymbol(NSLookupAndBindSymbol(symbol)); |
133 | else |
134 | addr = NULL; |
135 | |
136 | return addr; |
137 | } |
138 | |
139 | |
140 | |
141 | /* ----- code from dl_dlopen.xs below here ----- */ |
142 | |
143 | |
144 | static void |
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145 | dl_private_init(pTHX) |
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146 | { |
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147 | (void)dl_generic_private_init(aTHX); |
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148 | } |
149 | |
150 | MODULE = DynaLoader PACKAGE = DynaLoader |
151 | |
152 | BOOT: |
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153 | (void)dl_private_init(aTHX); |
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154 | |
155 | |
156 | |
157 | void * |
158 | dl_load_file(filename, flags=0) |
159 | char * filename |
160 | int flags |
161 | PREINIT: |
162 | int mode = 1; |
163 | CODE: |
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164 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); |
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165 | if (flags & 0x01) |
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166 | Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); |
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167 | RETVAL = dlopen(filename, mode) ; |
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168 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL)); |
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169 | ST(0) = sv_newmortal() ; |
170 | if (RETVAL == NULL) |
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171 | SaveError(aTHX_ "%s",dlerror()) ; |
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172 | else |
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173 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
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174 | |
175 | |
176 | void * |
177 | dl_find_symbol(libhandle, symbolname) |
178 | void * libhandle |
179 | char * symbolname |
180 | CODE: |
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181 | symbolname = Perl_form_nocontext("_%s", symbolname); |
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182 | DLDEBUG(2, PerlIO_printf(Perl_debug_log, |
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183 | "dl_find_symbol(handle=%lx, symbol=%s)\n", |
184 | (unsigned long) libhandle, symbolname)); |
185 | RETVAL = dlsym(libhandle, symbolname); |
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186 | DLDEBUG(2, PerlIO_printf(Perl_debug_log, |
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187 | " symbolref = %lx\n", (unsigned long) RETVAL)); |
188 | ST(0) = sv_newmortal() ; |
189 | if (RETVAL == NULL) |
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190 | SaveError(aTHX_ "%s",dlerror()) ; |
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191 | else |
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192 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
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193 | |
194 | |
195 | void |
196 | dl_undef_symbols() |
197 | PPCODE: |
198 | |
199 | |
200 | |
201 | # These functions should not need changing on any platform: |
202 | |
203 | void |
204 | dl_install_xsub(perl_name, symref, filename="$Package") |
205 | char * perl_name |
206 | void * symref |
207 | char * filename |
208 | CODE: |
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209 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", |
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210 | perl_name, symref)); |
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211 | ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, |
212 | (void(*)(pTHX_ CV *))symref, |
213 | filename))); |
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214 | |
215 | |
216 | char * |
217 | dl_error() |
218 | CODE: |
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219 | dMY_CXT; |
220 | RETVAL = dl_last_error ; |
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221 | OUTPUT: |
222 | RETVAL |
223 | |
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224 | # end. |