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0c1a135ada
Summary: This allows unwinding to work across signal handler frames where the IP of the previous frame is not the same as the current value of the RA register. This is particularly useful for acquiring backtraces from signal handlers. I kept the size of the context structure the same to avoid ABI breakage; the PC is stored in the previously unused slot for register 0. Reviewers: #libunwind, mhorne, lenary, luismarques, arichardson, compnerd Reviewed By: #libunwind, mhorne, lenary, compnerd Subscribers: kamleshbhalui, jrtc27, bsdjhb, arichardson, compnerd, simoncook, kito-cheng, shiva0217, rogfer01, rkruppe, psnobl, benna, Jim, s.egerton, sameer.abuasal, evandro, llvm-commits, libcxx-commits Tags: #libunwind, #llvm Differential Revision: https://reviews.llvm.org/D78931