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| author | Peter S. Housel <housel@acm.org> | 2021-10-14 13:31:05 -0700 |
|---|---|---|
| committer | Peter S. Housel <housel@acm.org> | 2021-11-18 08:06:46 -0800 |
| commit | bab39816085d715e52c2131fa249ccd10178764b (patch) | |
| tree | 8b6fd0c4817a07ae5617618c4d7bf56cb96e496c /llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | |
| parent | 18ba57a53a818bc155aa7d1f65dca79879aa5683 (diff) | |
| download | llvm-bab39816085d715e52c2131fa249ccd10178764b.zip llvm-bab39816085d715e52c2131fa249ccd10178764b.tar.gz llvm-bab39816085d715e52c2131fa249ccd10178764b.tar.bz2 | |
[libunwind] Add an interface for dynamic .eh_frame registration
The libgcc runtime library provides __register_frame and
__deregister_frame functions, which can be used by dynamic code
generators to register an .eh_frame section, which contains one or
more Call Frame Information records, each consisting of a Common
Information Entry record followed by one or more Frame Description
Entry records. This libunwind library also provides __register_frame
and __deregister_frame functions, but they are aliases for
__unw_add_dynamic_fde and __unw_remove_dynamic_fde and thus can only
take a single FDE.
This patch adds __unw_add_dynamic_eh_frame_section and
__unw_remove_dynamic_eh_frame_section functions which explicitly use
the .eh_frame format. Clients such as the ORCv2 platform and runtime
can check for these functions and use them if unwinding is being
provided by libunwind, or fall back to __register_frame and
__deregister_frame if unwinding is provided by libgcc.
Reviewed By: lhames
Differential Revision: https://reviews.llvm.org/D111863
Diffstat (limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')
0 files changed, 0 insertions, 0 deletions