[libcxx-commits] [PATCH] D101298: [libc++abi][AIX] Enable calculating addresses with DW_EH_PE_datarel

[Xing Xue via Phabricator via libcxx-commits]

xingxue created this revision.
xingxue added reviewers: MaskRay, phosek, mstorsjo, sfertile, jasonliu, hubert.reinterpretcast, cebowleratibm, libc++abi.
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This patch enables calculating relative addresses with the `DW_EH_PE_datarel` encoding using a base.  For functions invoked by scan_eh_tab() to scan the range table, a new parameter `base` is added to pass the base. For platforms where base is not used, `base` defaults to 0. After setting registers for jumping to the user code in `gxx_personality_v0()`, the `base` is cached in `exception_header` member `catchTemp` for use in `__cxa_call_unexpected` if `ttypeIndex` is less than 0 (exception spec).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101298

Files:
  libcxxabi/src/cxa_personality.cpp

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