2937b28218
This reverts commit 0df522969a7a0128052bd79182c8d58e00556e2f. Additional checks are added to fix the detection of the last memory region in GetMemoryRegions or repeating the "memory region" command when the target has non-address bits. Normally you keep reading from address 0, looking up each region's end address until you get LLDB_INVALID_ADDR as the region end address. (0xffffffffffffffff) This is what the remote will return once you go beyond the last mapped region: [0x0000fffffffdf000-0x0001000000000000) rw- [stack] [0x0001000000000000-0xffffffffffffffff) --- Problem is that when we "fix" the lookup address, we remove some bits from it. On an AArch64 system we have 48 bit virtual addresses, so when we fix the end address of the [stack] region the result is 0. So we loop back to the start. [0x0000fffffffdf000-0x0001000000000000) rw- [stack] [0x0000000000000000-0x0000000000400000) --- To fix this I added an additional check for the last range. If the end address of the region is different once you apply FixDataAddress, we are at the last region. Since the end of the last region will be the last valid mappable address, plus 1. That 1 will be removed by the ABI plugin. The only side effect is that on systems with non-address bits, you won't get that last catch all unmapped region from the max virtual address up to 0xf...f. [0x0000fffff8000000-0x0000fffffffdf000) --- [0x0000fffffffdf000-0x0001000000000000) rw- [stack] <ends here> Though in some way this is more correct because that region is not just unmapped, it's not mappable at all. No extra testing is needed because this is already covered by TestMemoryRegion.py, I simply forgot to run it on system that had both top byte ignore and pointer authentication. This change has been tested on a qemu VM with top byte ignore, memory tagging and pointer authentication enabled. Reviewed By: omjavaid Differential Revision: https://reviews.llvm.org/D115508
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============================
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LLVM |release| Release Notes
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============================
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.. contents::
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:local:
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.. only:: PreRelease
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.. warning::
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These are in-progress notes for the upcoming LLVM |version| release.
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Release notes for previous releases can be found on
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`the Download Page <https://releases.llvm.org/download.html>`_.
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Introduction
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============
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This document contains the release notes for the LLVM Compiler Infrastructure,
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release |release|. Here we describe the status of LLVM, including major improvements
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from the previous release, improvements in various subprojects of LLVM, and
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some of the current users of the code. All LLVM releases may be downloaded
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from the `LLVM releases web site <https://llvm.org/releases/>`_.
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For more information about LLVM, including information about the latest
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release, please check out the `main LLVM web site <https://llvm.org/>`_. If you
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have questions or comments, the `LLVM Developer's Mailing List
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<https://lists.llvm.org/mailman/listinfo/llvm-dev>`_ is a good place to send
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them.
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Note that if you are reading this file from a Git checkout or the main
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LLVM web page, this document applies to the *next* release, not the current
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one. To see the release notes for a specific release, please see the `releases
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page <https://llvm.org/releases/>`_.
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Non-comprehensive list of changes in this release
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=================================================
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.. NOTE
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For small 1-3 sentence descriptions, just add an entry at the end of
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point (e.g. maybe you would like to give an example of the
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functionality, or simply have a lot to talk about), see the `NOTE` below
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for adding a new subsection.
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.. NOTE
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If you would like to document a larger change, then you can add a
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subsection about it right here. You can copy the following boilerplate
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and un-indent it (the indentation causes it to be inside this comment).
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Special New Feature
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-------------------
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Makes programs 10x faster by doing Special New Thing.
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* ...
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Changes to the LLVM IR
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----------------------
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Changes to building LLVM
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------------------------
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Changes to TableGen
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-------------------
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Changes to the AArch64 Backend
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------------------------------
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Changes to the ARM Backend
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--------------------------
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* Added support for the Armv9-A, Armv9.1-A and Armv9.2-A architectures.
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* Added support for the Armv8.1-M PACBTI-M extension.
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* Added support for the Armv9-A, Armv9.1-A and Armv9.2-A architectures.
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* Added support for the Armv8.1-M PACBTI-M extension.
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* Removed the deprecation of ARMv8-A T32 Complex IT blocks. No deprecation
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warnings will be generated and -mrestrict-it is now always off by default.
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Previously it was on by default for Armv8 and off for all other architecture
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versions.
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Changes to the MIPS Target
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--------------------------
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During this release ...
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Changes to the Hexagon Target
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Changes to the PowerPC Target
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During this release ...
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Changes to the X86 Target
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During this release ...
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Changes to the AMDGPU Target
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During this release ...
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Changes to the AVR Target
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During this release ...
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Changes to the WebAssembly Target
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---------------------------------
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During this release ...
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Changes to the OCaml bindings
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Changes to the C API
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--------------------
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Changes to the Go bindings
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--------------------------
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Changes to the FastISel infrastructure
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--------------------------------------
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* ...
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Changes to the DAG infrastructure
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---------------------------------
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Changes to the Debug Info
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---------------------------------
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During this release ...
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Changes to the LLVM tools
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---------------------------------
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Changes to LLDB
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---------------------------------
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* The ``memory region`` command and ``GetMemoryRegionInfo`` API method now
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ignore non-address bits in the address parameter. This also means that on
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systems with non-address bits the last (usually unmapped) memory region
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will not extend to 0xF...F. Instead it will end at the end of the mappable
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range that the virtual address size allows.
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Changes to Sanitizers
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---------------------
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External Open Source Projects Using LLVM 15
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===========================================
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* A project...
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Additional Information
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======================
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A wide variety of additional information is available on the `LLVM web page
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<https://llvm.org/>`_, in particular in the `documentation
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<https://llvm.org/docs/>`_ section. The web page also contains versions of the
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code. You can access versions of these documents specific to this release by
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going into the ``llvm/docs/`` directory in the LLVM tree.
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If you have any questions or comments about LLVM, please feel free to contact
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