[all-commits] [llvm/llvm-project] 43ad52: [lldb][AArch64] Add reading of TLS tpidr register ...

[David Spickett via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 43ad521f2fa9a50e6b30425a3b9fb3025b42587a
      https://github.com/llvm/llvm-project/commit/43ad521f2fa9a50e6b30425a3b9fb3025b42587a
  Author: David Spickett <david.spickett at linaro.org>
  Date:   2023-08-03 (Thu, 03 Aug 2023)

  Changed paths:
    M lldb/include/lldb/Host/linux/Ptrace.h
    M lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.cpp
    M lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.h
    M lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h
    M lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp
    M lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.h
    M lldb/source/Plugins/Process/elf-core/RegisterUtilities.h
    M lldb/test/API/functionalities/postmortem/elf-core/TestLinuxCore.py
    M lldb/test/API/functionalities/postmortem/elf-core/linux-aarch64-neon.c
    M lldb/test/API/functionalities/postmortem/elf-core/linux-aarch64-neon.core
    M llvm/docs/ReleaseNotes.rst

  Log Message:
  -----------
  [lldb][AArch64] Add reading of TLS tpidr register from core files

7e229217f4215b519b886e7881bae4da3742a7d2 did live processes, this does
core files. Pretty simple, there is an NT_ARM_TLS note that contains
at least tpidr, and on systems with the Scalable Matrix Extension (SME), tpidr2
as well.

tpidr2 will be handled in future patches for SME support.

This NT_ARM_TLS note has always been present but it seems convenient to
handle it as "optional" inside of LLDB. We'll probably want the flexibility
when supporting tpidr2.

Normally the C library would set tpidr but all our test sources build
without it. So I've updated the neon test program to write to tpidr
and regenerated the corefile.

I've removed the LLDB_PTRACE_NT_ARM_TLS that was unused, we get
what we need from llvm's defs instead.

Reviewed By: omjavaid

Differential Revision: https://reviews.llvm.org/D156118