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libunwind: Simplify _unw_{get,set}context under c18n #740

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libunwind: Simplify _unw_{get,set}context under c18n #740

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Commits on Aug 29, 2024

  1. libunwind: Use APIs exposed by RTLD to unwind the trusted stack 

    Assembly stubs for _rtld_unw_{get,set}context are no longer needed.

Due to the significantly simplified implementation, the
LIBUNWIND_CHERI_C18N_SUPPORT option has been removed and c18n support is
now included by default for supported architectures (currently Morello
only).
    @dpgao
    dpgao committed Aug 29, 2024
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