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