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* MFC r311647: libunwind: add noexec stack annotationemaste2017-01-202-0/+4
| | | | Sponsored by: The FreeBSD Foundation
* MFC r310365: libunwind: make __{de,}register_frame compatible with libgcc APIemaste2017-01-201-0/+42
| | | | | | | | | | | | | | | | | | The libgcc __register_frame and __deregister_frame functions take a pointer to a set of FDE/CIEs, terminated by an entry where length is 0. In Apple's libunwind implementation the pointer is taken to be to a single FDE. I suspect this was just an Apple bug, compensated by Apple- specific code in LLVM. See lib/ExecutionEngine/RuntimeDyld/RTDyldMemoryManager.cpp and http://lists.llvm.org/pipermail/llvm-dev/2013-April/061737.html for more detail. This change is based on the LLVM RTDyldMemoryManager.cpp. It should later be changed to be alignment-safe. Sponsored by: The FreeBSD Foundation
* MFC r308006: libunwind: consistently add \n to log and trace messagesemaste2017-01-2010-147/+147
| | | | | | | | | | | | Previously most messages included a newline in the string, but a few of them were missing. Fix these and simplify by just adding the newline in the _LIBUNWIND_LOG macro itself. While here correct 'libuwind' typo (missing 'n'). Upstream LLVM libunwind commits r280086 and r280103. Sponsored by: The FreeBSD Foundation
* MFC r303521: libunwind: correct return code in unwinding trace log messageemaste2016-08-011-1/+1
| | | | Approved by: re (gjb)
* Merge LLVM libunwind fixesemaste2016-07-251-1/+1
| | | | | | | | | | | | | | | | | r302475: libunwind: limit stack usage in unwind cursor This may be reworked upstream but in the interim should address the stack usage issue reported in the PR. r303061: libunwind: Properly align _Unwind_Exception. _Unwind_Exception is required to be double word aligned. GCC has interpreted this to mean "use the maximum useful alignment for the target" so follow that lead. PR: 206384 (r302475) Obtained from: LLVM review D22543 (r303061) Approved by: re (gjb)
* MFC libunwind improvementsemaste2016-07-2210-433/+464
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | r302450: libunwind: update to upstream snapshot r272680 The key improvement is that it may be built without cross-unwinding support, which significantly reduces the stack space requirement. r302456: libunwind: enable only the native unwinder by default This significantly reduces stack space requirements, and runtimes require only native unwinding. r302475: libunwind: limit stack usage in unwind cursor This may be reworked upstream but in the interim should address the stack usage issue reported in the PR. r303016: llvm-libunwind: use conventional (non-Darwin) X86 register numbers For historical reasons Darwin/i386 has ebp and esp swapped in the eh_frame register numbering. That is: Darwin Other Reg # eh_frame eh_frame DWARF ===== ======== ======== ===== 4 ebp esp esp 5 esp ebp ebp Although the UNW_X86_* constants are not supposed to be coupled to DWARF / eh_frame numbering they are currently conflated in LLVM libunwind, and thus we require the non-Darwin numbering. PR: 206384 Approved by: re (kib) Sponsored by: The FreeBSD Foundation
* Add stubs for RISC-V ISA so libunwind can be compiled.br2016-01-226-1/+276
| | | | | | | Reviewed by: emaste Sponsored by: DARPA, AFRL Sponsored by: HEIF5 Differential Revision: https://reviews.freebsd.org/D5035
* libunwind: Include header for dl_unwind_find_exidx for ARM EHABIemaste2016-01-061-0/+1
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* Merge LLVM libunwind revision 256779emaste2016-01-046-2/+24
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* Bring LLVM libunwind snapshot into contrib/llvm/projectsemaste2015-09-2321-0/+10562
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