return start - *stextOffset, true
	}
	return 0, false
}

// GetBase determines the base address to subtract from virtual
// address to get symbol table address. For an executable, the base
// is 0. Otherwise, it's a shared library, and the base is the
// address where the mapping starts. The kernel needs special handling.

            variantsByName = Collections.emptyMap();
        }
        for (AdditionalVariant additionalVariant : variantMetadataRules.getAdditionalVariants()) {
            String baseName = additionalVariant.getBase();
            VariantGraphResolveMetadata base = null;
            if (baseName != null) {
                if (variants.isPresent()) {
                    base = variantsByName.get(baseName);

	// value until we have a sample address for this mapping, so that we can
	// correctly identify the associated program segment that is needed to compute
	// the base.
	if _, err := elfexec.GetBase(&ef.FileHeader, elfexec.FindTextProgHeader(ef), kernelOffset, start, limit, offset); err != nil {
		return nil, fmt.Errorf("could not identify base for %s: %v", name, err)
	}