[all-commits] [llvm/llvm-project] 58b33d: [libunwind] fix dynamic .eh_frame registration (#...

[SihangZhu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 58b33d0301a36900fc641b4b0e110b683064bab8
      https://github.com/llvm/llvm-project/commit/58b33d0301a36900fc641b4b0e110b683064bab8
  Author: SihangZhu <zhusihang at huawei.com>
  Date:   2024-01-16 (Tue, 16 Jan 2024)

  Changed paths:
    M libunwind/src/libunwind.cpp

  Log Message:
  -----------
  [libunwind]  fix dynamic .eh_frame registration (#77185)

Fix this issue
[#76957](https://github.com/llvm/llvm-project/issues/76957)
Libgcc provides __register_frame to register a dynamic .eh_frame
section, while __unw_add_dynamic_eh_frame_section can be used to do the
same in libunwind. However, the address after dynamic .eh_frame are
padding with 0 value, it will be identified as
legal CIE. And __unw_add_dynamic_eh_frame_section will continue to parse
subsequent addresses until illegal memory or other sections are
accessed.
This patch adds length formal parameter for dynamic registration.