[libcxx-commits] [PATCH] D158655: [libunwind][AIX] Fix problem with stepping up from a leaf function when unwinding started in a signal handler

[Xing Xue via Phabricator via libcxx-commits]

xingxue updated this revision to Diff 554785.
xingxue marked 5 inline comments as done.
xingxue added a comment.

Addressed comments.

- add code to handle the case where a function does not store the back chain (`stores_bc` is `0`)
- swap the order of getting sigcontext from a signal trampoline frame, now trying stack + `STKMINALIGN` first and then stack + `STKMIN`
- remove the condition check when restoring the SP
- add the test case for the case where a function does not store the back chain


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158655/new/

https://reviews.llvm.org/D158655

Files:
  libunwind/src/Registers.hpp
  libunwind/src/UnwindCursor.hpp
  libunwind/src/UnwindRegistersSave.S
  libunwind/test/aix_signal_unwind.pass.sh.S

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