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feat(libcpu): initialize static TLS for C++ threads - #11961

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feat(libcpu): initialize static TLS for C++ threads#11961
GuEe-GUI wants to merge 2 commits into
RT-Thread:masterfrom
GuEe-GUI:cpp_tls

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@GuEe-GUI

@GuEe-GUI GuEe-GUI commented Oct 31, 2026

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拉取/合并请求描述：(PR description)

[
Preserve the linked .tdata/.tbss image and instantiate it for each native RT-Thread thread. Restore the AArch64 TPIDR_EL0 base on every context switch.

Enable the RISC-V path only for MMU-enabled S-mode configurations and seed tp in a thread's initial switch frame, retaining existing M-mode and non-MMU tp behavior.

]

当前拉取/合并请求的状态 Intent for your PR

必须选择一项 Choose one (Mandatory):

  • 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
  • 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

  • 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
  • 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
  • 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
  • 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
  • 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
  • 代码是高质量的 Code in this PR is of high quality
  • 已经使用clang-format 源码格式化工具确保格式符合RT-Thread代码规范 This PR has been formatted with clang-format and complies with RT-Thread code specification
  • 如果是新增bsp, 已经添加ci检查到.github/ALL_BSP_COMPILE.json 详细请参考链接BSP自查

@GuEe-GUI
feat(libcpu): initialize static TLS for C++ threads
cc882a1 
Preserve the linked .tdata/.tbss image and instantiate it for each native RT-Thread thread. Restore the AArch64 TPIDR_EL0 base on every context switch.

Enable the RISC-V path only for MMU-enabled S-mode configurations and seed tp in a thread's initial switch frame, retaining existing M-mode and non-MMU tp behavior.

Signed-off-by: GuEe-GUI <2991707448@qq.com>
@github-actions

github-actions Bot commented Oct 31, 2026

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👋 感谢您对 RT-Thread 的贡献！Thank you for your contribution to RT-Thread!

为确保代码符合 RT-Thread 的编码规范，请在你的仓库中执行以下步骤运行代码格式化工作流（如果格式化CI运行失败）。
To ensure your code complies with RT-Thread's coding style, please run the code formatting workflow by following the steps below (If the formatting of CI fails to run).

🛠 操作步骤 | Steps

  1. 前往 Actions 页面 | Go to the Actions page
    点击进入工作流 → | Click to open workflow →

  2. 点击 Run workflow | Click Run workflow

  • Use workflow from 保持默认分支（通常为 master）
    Keep the default branch (usually master) in Use workflow from
  • 在 branch 输入框填写 PR 分支 cpp_tls
    Enter PR branch cpp_tls in the branch field
  • 设置需排除的文件/目录（目录请以"/"结尾）
    Set files/directories to exclude (directories should end with "/")
  1. 等待工作流完成 | Wait for the workflow to complete
    格式化后的代码将作为独立提交推送至你的分支。
    The formatting changes will be pushed to your branch as a separate commit.

完成后，提交将自动更新至 cpp_tls 分支，关联的 Pull Request 也会同步更新。
Once completed, commits will be pushed to the cpp_tls branch automatically, and the related Pull Request will be updated.

如有问题欢迎联系我们，再次感谢您的贡献！💐
If you have any questions, feel free to reach out. Thanks again for your contribution!

@github-actions github-actions Bot added Arch: RISC-V BSP related with risc-v Arch: ARM/AArch64 BSP related with arm libcpu labels Oct 31, 2026
@github-actions

github-actions Bot commented Oct 31, 2026 •
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📌 Code Review Assignment

🏷️ Tag: components

Reviewers: @Maihuanyi

Changed Files (Click to expand)
  • components/libc/compilers/common/clocale.c

🏷️ Tag: components_libc

Reviewers: @GorrayLi @mysterywolf

Changed Files (Click to expand)
  • components/libc/compilers/common/clocale.c

🏷️ Tag: libcpu_riscv

Reviewers: @Yaochenger

Changed Files (Click to expand)
  • libcpu/risc-v/common/stack.c
  • libcpu/risc-v/link.lds.S

📊 Current Review Status (Last Updated: 2026-10-31 16:32 CST)

📝 Review Instructions

  1. 维护者可以通过单击此处来刷新审查状态: 🔄 刷新状态
    Maintainers can refresh the review status by clicking here: 🔄 Refresh Status

  2. 确认审核通过后评论 LGTM/lgtm
    Comment LGTM/lgtm after confirming approval

  3. PR合并前需至少一位维护者确认
    PR must be confirmed by at least one maintainer before merging

ℹ️ 刷新CI状态操作需要具备仓库写入权限。
ℹ️ Refresh CI status operation requires repository Write permission.

@github-actions

github-actions Bot commented Oct 31, 2026 •
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MemBrowse Memory Report · Explore what changed →

simulator

  • Code: .eh_frame +32 B, .eh_frame_hdr +8 B, .rela.dyn +24 B, .text +20 B (+0.0%, 2,672,874 B)
  • Data: .init_array +8 B (+0.0%, 1,609,036 B)

No memory changes detected for:

Catch memory regressions in CI with MemBrowse. Free for open source.

@GuEe-GUI
fix(libc): provide kernel-mode musl locale subset
42f639a 
Native RT-Thread kernel threads do not provide musl's Linux pthread locale object at the architecture thread pointer. Provide UTF-8 nl_langinfo(CODESET) and btowc() for kernel-mode musl, while leaving RT-Smart on its normal musl implementation.
@GuEe-GUI
GuEe-GUI requested a review from mysterywolf as a code owner October 31, 2026 08:31

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@mysterywolf mysterywolf Awaiting requested review from mysterywolf mysterywolf is a code owner

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