38 lines
817 B
C
38 lines
817 B
C
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#include <dlfcn.h>
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#include <stddef.h>
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#include <stdio.h>
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extern int foo(void)
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{
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return 42;
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}
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int (*func_ptr)(void) = foo;
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int main(void)
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{
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void* lib = dlopen(NULL, RTLD_NOW | RTLD_GLOBAL);
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void* symbol;
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#if 0
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/* The Gold linker will garbage-collect unused global functions
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* even if --Wl,--export-dynamic is used. So use a dummy global
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* variable reference here to prevent this.
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*/
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if (foo() != 42)
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return 3;
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#endif
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if (lib == NULL) {
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fprintf(stderr, "Could not open self-executable with dlopen(NULL) !!: %s\n", dlerror());
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return 1;
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}
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symbol = dlsym(lib, "foo");
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if (symbol == NULL) {
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fprintf(stderr, "Could not lookup symbol inside executable !!: %s\n", dlerror());
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return 2;
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}
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dlclose(lib);
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return 0;
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}
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