contrib/libs/linuxvdso/interface.cpp


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#include "interface.h" 
#include "original/vdso_support.h" 
 
#ifdef HAVE_VDSO_SUPPORT
 
size_t NVdso::Enumerate(TSymbol* s, size_t len) { 
    if (!len) { 
        return 0; 
    } 
 
    base::VDSOSupport vdso; 
 
    if (!vdso.IsPresent()) { 
        return 0; 
    } 
 
    size_t n = 0; 
 
    for (base::VDSOSupport::SymbolIterator it = vdso.begin(); it != vdso.end(); ++it) { 
        *s++ = TSymbol(it->name, (void*)it->address); 
        ++n; 
 
        if (!--len) { 
            break; 
        } 
    } 
 
    return n; 
} 

void* NVdso::Function(const char* name, const char* version) {
    base::VDSOSupport::SymbolInfo info;
    // Have to cast away the `const` to make this reinterpret_cast-able to a function pointer.
    return base::VDSOSupport().LookupSymbol(name, version, STT_FUNC, &info) ? (void*) info.address : nullptr;
}

#else

size_t NVdso::Enumerate(TSymbol*, size_t) {
    return 0;
}

void* NVdso::Function(const char*, const char*) {
    return nullptr;
}

#endif