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* Reland "[DebugInfo] Support DWARF expressions in eh_frame"Rafael Auler2018-03-081-0/+170
| | | | | | | | | | Summary: Original change was D43313 (r326932) and reverted by r326953 because it broke an LLD test and a windows build. The LLD test was already fixed in lld commit r326944 (thanks maskray). This is the original change with the windows build fixed. llvm-svn: 326970
* Revert r326932: [DebugInfo] Support DWARF expressions in eh_frameRui Ueyama2018-03-071-170/+0
| | | | | | This reverts commit rr326932 because it broke lld/test/ELF/eh-frame-hdr-augmentation.s. llvm-svn: 326953
* [DebugInfo] Support DWARF expressions in eh_frameRafael Auler2018-03-071-0/+170
This patch enhances DWARFDebugFrame with the capability of parsing and printing DWARF expressions in CFI instructions. It also makes FDEs and CIEs accessible to lib users, so they can process them in client tools that rely on LLVM. To make it self-contained with a test case, it teaches llvm-readobj to be able to dump EH frames and checks they are correct in a unit test. The llvm-readobj code is Maksim Panchenko's work (maksfb). Reviewers: JDevlieghere, espindola Reviewed By: JDevlieghere Differential Revision: https://reviews.llvm.org/D43313 llvm-svn: 326932
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