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-rw-r--r--compiler/rustc_target/src/spec/aarch64_unknown_teeos.rs16
-rw-r--r--compiler/rustc_target/src/spec/mod.rs3
-rw-r--r--compiler/rustc_target/src/spec/teeos_base.rs29
-rw-r--r--src/bootstrap/lib.rs2
-rw-r--r--src/doc/rustc/src/SUMMARY.md1
-rw-r--r--src/doc/rustc/src/platform-support.md1
-rw-r--r--src/doc/rustc/src/platform-support/aarch64-unknown-teeos.md100
-rw-r--r--tests/ui/check-cfg/values-target-json.stderr2
-rw-r--r--tests/ui/check-cfg/well-known-values.stderr2
9 files changed, 153 insertions, 3 deletions
diff --git a/compiler/rustc_target/src/spec/aarch64_unknown_teeos.rs b/compiler/rustc_target/src/spec/aarch64_unknown_teeos.rs
new file mode 100644
index 00000000000..64a7dc681c8
--- /dev/null
+++ b/compiler/rustc_target/src/spec/aarch64_unknown_teeos.rs
@@ -0,0 +1,16 @@
+use crate::spec::Target;
+
+pub fn target() -> Target {
+    let mut base = super::teeos_base::opts();
+    base.features = "+strict-align,+neon,+fp-armv8".into();
+    base.max_atomic_width = Some(128);
+    base.linker = Some("aarch64-linux-gnu-ld".into());
+
+    Target {
+        llvm_target: "aarch64-unknown-none".into(),
+        pointer_width: 64,
+        data_layout: "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128".into(),
+        arch: "aarch64".into(),
+        options: base,
+    }
+}
diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index 7114c243ea1..0229fa06e85 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -83,6 +83,7 @@ mod openbsd_base;
 mod redox_base;
 mod solaris_base;
 mod solid_base;
+mod teeos_base;
 mod thumb_base;
 mod uefi_msvc_base;
 mod unikraft_linux_musl_base;
@@ -1492,6 +1493,8 @@ supported_targets! {
 
     ("x86_64-unknown-none", x86_64_unknown_none),
 
+    ("aarch64-unknown-teeos", aarch64_unknown_teeos),
+
     ("mips64-openwrt-linux-musl", mips64_openwrt_linux_musl),
 
     ("aarch64-unknown-nto-qnx710", aarch64_unknown_nto_qnx_710),
diff --git a/compiler/rustc_target/src/spec/teeos_base.rs b/compiler/rustc_target/src/spec/teeos_base.rs
new file mode 100644
index 00000000000..1bc71bab016
--- /dev/null
+++ b/compiler/rustc_target/src/spec/teeos_base.rs
@@ -0,0 +1,29 @@
+use super::{Cc, LinkerFlavor, Lld, PanicStrategy};
+use crate::spec::{RelroLevel, TargetOptions};
+
+pub fn opts() -> TargetOptions {
+    let lld_args = &["-zmax-page-size=4096", "-znow", "-ztext", "--execute-only"];
+    let cc_args = &["-Wl,-zmax-page-size=4096", "-Wl,-znow", "-Wl,-ztext", "-mexecute-only"];
+
+    let mut pre_link_args = TargetOptions::link_args(LinkerFlavor::Gnu(Cc::No, Lld::No), lld_args);
+    super::add_link_args(&mut pre_link_args, LinkerFlavor::Gnu(Cc::Yes, Lld::No), cc_args);
+
+    TargetOptions {
+        os: "teeos".into(),
+        vendor: "unknown".into(),
+        dynamic_linking: true,
+        linker_flavor: LinkerFlavor::Gnu(Cc::Yes, Lld::No),
+        // rpath hardcodes -Wl, so it can't be used together with ld.lld.
+        // C TAs also don't support rpath, so this is fine.
+        has_rpath: false,
+        // Note: Setting has_thread_local to true causes an error when
+        // loading / dyn-linking the TA
+        has_thread_local: false,
+        position_independent_executables: true,
+        relro_level: RelroLevel::Full,
+        crt_static_respected: true,
+        pre_link_args,
+        panic_strategy: PanicStrategy::Abort,
+        ..Default::default()
+    }
+}
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 365deb8e155..a00db502e08 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -134,7 +134,7 @@ const EXTRA_CHECK_CFGS: &[(Option<Mode>, &'static str, Option<&[&'static str]>)]
     // #[cfg(bootstrap)]
     (Some(Mode::Std), "target_vendor", Some(&["unikraft"])),
     (Some(Mode::Std), "target_env", Some(&["libnx"])),
-    // (Some(Mode::Std), "target_os", Some(&[])),
+    (Some(Mode::Std), "target_os", Some(&["teeos"])),
     // #[cfg(bootstrap)] mips32r6, mips64r6
     (
         Some(Mode::Std),
diff --git a/src/doc/rustc/src/SUMMARY.md b/src/doc/rustc/src/SUMMARY.md
index f108831138d..00c6ca13334 100644
--- a/src/doc/rustc/src/SUMMARY.md
+++ b/src/doc/rustc/src/SUMMARY.md
@@ -28,6 +28,7 @@
     - [armv7-unknown-linux-uclibceabihf](platform-support/armv7-unknown-linux-uclibceabihf.md)
     - [\*-android and \*-androideabi](platform-support/android.md)
     - [\*-linux-ohos](platform-support/openharmony.md)
+    - [aarch64-unknown-teeos](platform-support/aarch64-unknown-teeos.md)
     - [\*-esp-espidf](platform-support/esp-idf.md)
     - [\*-unknown-fuchsia](platform-support/fuchsia.md)
     - [\*-kmc-solid_\*](platform-support/kmc-solid.md)
diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index 8c5dc11eeef..72c3f153884 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/src/doc/rustc/src/platform-support.md
@@ -221,6 +221,7 @@ target | std | host | notes
 [`aarch64-nintendo-switch-freestanding`](platform-support/aarch64-nintendo-switch-freestanding.md) | * |  | ARM64 Nintendo Switch, Horizon
 [`aarch64-pc-windows-gnullvm`](platform-support/pc-windows-gnullvm.md) | ✓ | ✓ |
 [`aarch64-unknown-linux-ohos`](platform-support/openharmony.md) | ✓ |  | ARM64 OpenHarmony |
+[`aarch64-unknown-teeos`](platform-support/aarch64-unknown-teeos.md) | ? |  | ARM64 TEEOS |
 [`aarch64-unknown-nto-qnx710`](platform-support/nto-qnx.md) | ✓ |  | ARM64 QNX Neutrino 7.1 RTOS |
 `aarch64-unknown-freebsd` | ✓ | ✓ | ARM64 FreeBSD
 [`aarch64-unknown-hermit`](platform-support/hermit.md) | ✓ |  | ARM64 Hermit
diff --git a/src/doc/rustc/src/platform-support/aarch64-unknown-teeos.md b/src/doc/rustc/src/platform-support/aarch64-unknown-teeos.md
new file mode 100644
index 00000000000..8fc5e6dd92b
--- /dev/null
+++ b/src/doc/rustc/src/platform-support/aarch64-unknown-teeos.md
@@ -0,0 +1,100 @@
+# `aarch64-unknown-teeos`
+
+**Tier: 3**
+
+Target for the TEEOS operating system.
+
+TEEOS is a mini os run in TrustZone, for trusted/security apps. The kernel of TEEOS is HongMeng/ChCore micro kernel. The libc for TEEOS is a part of musl.
+It's very small that there is no RwLock, no network, no stdin, and no file system for apps in TEEOS.
+
+Some abbreviation:
+| Abbreviation | The full text | Description |
+|  ----  | ----  | ---- |
+| TEE | Trusted Execution Environment | ARM TrustZone devide the system into two worlds/modes -- the secure world/mode and the normal world/mode. TEE is in the secure world/mode. |
+| REE | Rich Execution Environment | The normal world. for example, Linux for Android phone is in REE side. |
+| TA | Trusted Application | The app run in TEE side system. |
+| CA | Client Application | The progress run in REE side system. |
+
+TEEOS is open source in progress. [MORE about](https://gitee.com/opentrustee-group)
+
+## Target maintainers
+
+- Petrochenkov Vadim
+- Sword-Destiny
+
+## Setup
+We use OpenHarmony SDK for TEEOS.
+
+The OpenHarmony SDK doesn't currently support Rust compilation directly, so
+some setup is required.
+
+First, you must obtain the OpenHarmony SDK from [this page](https://gitee.com/openharmony/docs/tree/master/en/release-notes).
+Select the version of OpenHarmony you are developing for and download the "Public SDK package for the standard system".
+
+Create the following shell scripts that wrap Clang from the OpenHarmony SDK:
+
+`aarch64-unknown-teeos-clang.sh`
+
+```sh
+#!/bin/sh
+exec /path/to/ohos-sdk/linux/native/llvm/bin/clang \
+  --target aarch64-linux-gnu \
+  "$@"
+```
+
+`aarch64-unknown-teeos-clang++.sh`
+
+```sh
+#!/bin/sh
+exec /path/to/ohos-sdk/linux/native/llvm/bin/clang++ \
+  --target aarch64-linux-gnu \
+  "$@"
+```
+
+## Building the target
+
+To build a rust toolchain, create a `config.toml` with the following contents:
+
+```toml
+profile = "compiler"
+changelog-seen = 2
+
+[build]
+sanitizers = true
+profiler = true
+target = ["x86_64-unknown-linux-gnu", "aarch64-unknown-teeos"]
+submodules = false
+compiler-docs = false
+extended = true
+
+[install]
+bindir = "bin"
+libdir = "lib"
+
+[target.aarch64-unknown-teeos]
+cc = "/path/to/scripts/aarch64-unknown-teeos-clang.sh"
+cxx = "/path/to/scripts/aarch64-unknown-teeos-clang.sh"
+linker = "/path/to/scripts/aarch64-unknown-teeos-clang.sh"
+ar = "/path/to/ohos-sdk/linux/native/llvm/bin/llvm-ar"
+ranlib = "/path/to/ohos-sdk/linux/native/llvm/bin/llvm-ranlib"
+llvm-config = "/path/to/ohos-sdk/linux/native/llvm/bin/llvm-config"
+```
+
+## Building Rust programs
+
+Rust does not yet ship pre-compiled artifacts for this target. To compile for
+this target, you will either need to build Rust with the target enabled (see
+"Building the target" above), or build your own copy of `core` by using
+`build-std` or similar.
+
+You will need to configure the linker to use in `~/.cargo/config`:
+```toml
+[target.aarch64-unknown-teeos]
+linker = "/path/to/aarch64-unknown-teeos-clang.sh"
+```
+
+## Testing
+
+Running the Rust testsuite is not possible now.
+
+More information about how to test CA/TA. [See here](https://gitee.com/openharmony-sig/tee_tee_dev_kit/tree/master/docs)
diff --git a/tests/ui/check-cfg/values-target-json.stderr b/tests/ui/check-cfg/values-target-json.stderr
index eb81535e3ed..e773d5d83cc 100644
--- a/tests/ui/check-cfg/values-target-json.stderr
+++ b/tests/ui/check-cfg/values-target-json.stderr
@@ -6,7 +6,7 @@ LL | #[cfg(target_os = "linuz")]
    |                   |
    |                   help: there is a expected value with a similar name: `"linux"`
    |
-   = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `ericos`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `openbsd`, `psp`, `redox`, `solaris`, `solid_asp3`, `tvos`, `uefi`, `unknown`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`
+   = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `ericos`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `openbsd`, `psp`, `redox`, `solaris`, `solid_asp3`, `teeos`, `tvos`, `uefi`, `unknown`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`
    = note: `#[warn(unexpected_cfgs)]` on by default
 
 warning: 1 warning emitted
diff --git a/tests/ui/check-cfg/well-known-values.stderr b/tests/ui/check-cfg/well-known-values.stderr
index 2d18cb82e03..1f775814656 100644
--- a/tests/ui/check-cfg/well-known-values.stderr
+++ b/tests/ui/check-cfg/well-known-values.stderr
@@ -6,7 +6,7 @@ LL | #[cfg(target_os = "linuz")]
    |                   |
    |                   help: there is a expected value with a similar name: `"linux"`
    |
-   = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `openbsd`, `psp`, `redox`, `solaris`, `solid_asp3`, `tvos`, `uefi`, `unknown`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`
+   = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `openbsd`, `psp`, `redox`, `solaris`, `solid_asp3`, `teeos`, `tvos`, `uefi`, `unknown`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`
    = note: `#[warn(unexpected_cfgs)]` on by default
 
 warning: unexpected `cfg` condition value
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2026-04-26 11:21:02 +0000