hidden.h 966 B

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * When building position independent code with GCC using the -fPIC option,
  4. * (or even the -fPIE one on older versions), it will assume that we are
  5. * building a dynamic object (either a shared library or an executable) that
  6. * may have symbol references that can only be resolved at load time. For a
  7. * variety of reasons (ELF symbol preemption, the CoW footprint of the section
  8. * that is modified by the loader), this results in all references to symbols
  9. * with external linkage to go via entries in the Global Offset Table (GOT),
  10. * which carries absolute addresses which need to be fixed up when the
  11. * executable image is loaded at an offset which is different from its link
  12. * time offset.
  13. *
  14. * Fortunately, there is a way to inform the compiler that such symbol
  15. * references will be satisfied at link time rather than at load time, by
  16. * giving them 'hidden' visibility.
  17. */
  18. #pragma GCC visibility push(hidden)