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zld: handle parsing and synthesising unwind info in the MachO linker #14397

Merged
merged 9 commits into from
Jan 21, 2023
Merged

zld: handle parsing and synthesising unwind info in the MachO linker #14397

merged 9 commits into from
Jan 21, 2023

Commits on Jan 20, 2023

  1. zld: parse, synthesise and emit unwind records

    @kubkon
    kubkon committed Jan 20, 2023
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  2. link-tests: test unwind info emitter via c++ exceptions

    @kubkon
    kubkon committed Jan 20, 2023
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  3. link-tests: update uuid test with new uuid values 

    Changes only pertain arm64 as for x86_64 turns out we are
missing one additional feature which is synthesising unwind info
from only eh frame records, or at least this is what it looks like
when I analysed the output of Apple's ld.
    @kubkon
    kubkon committed Jan 20, 2023
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Commits on Jan 21, 2023

  1. std.macho: add OLD = 0 as valid mode for both arm64 and x86_64

    @kubkon
    kubkon committed Jan 21, 2023
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  2. macho: synthesise unwind records in absence of compact unwind section 

    Unlike Apple ld, we will not do any DWARF CFI parsing and simply
output DWARF type unwind records.
    @kubkon
    kubkon committed Jan 21, 2023
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  3. macho: properly relocate target symbol address in __eh_frame

    @kubkon
    kubkon committed Jan 21, 2023
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  4. macho: fix sorting symbols by seniority

    @kubkon
    kubkon committed Jan 21, 2023
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  5. zld: fix 32bit build

    @kubkon
    kubkon committed Jan 21, 2023
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  6. link-tests: do not expect __eh_frame section on x86_64-macos

    @kubkon
    kubkon committed Jan 21, 2023
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