symbols.cpp

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#include <common/symbols.h>
 
 
namespace MaxOS::common {
 
    const char* resolve_symbol(uintptr_t rip, uintptr_t link_base, uintptr_t load_base) {
 
        // No symbols
        if(KERNEL_SYMBOLS_COUNT == 0)
            return nullptr;
 
        // Convert load to linked
        uintptr_t offset = 0;
        if(load_base >= link_base)
            offset = load_base - link_base;
 
        // Get the adjusted address
        uintptr_t adjusted_address = rip;
        if(rip >= offset)
            adjusted_address = rip - offset;
 
        // Binary Search for symbol
        size_t left = 0;
        size_t right = KERNEL_SYMBOLS_COUNT;
        while(left < right) {
            size_t middle = (left + right) >> 1;
            if(kernel_symbols[middle].address <= adjusted_address)
                left = middle + 1;
            else
                right = middle;
        }
 
        return left == 0 ? nullptr : kernel_symbols[left - 1].name;
    }
}