diff options
author | Florian Mayer <fmayer@google.com> | 2022-01-19 14:03:44 -0800 |
---|---|---|
committer | Florian Mayer <fmayer@google.com> | 2022-01-19 16:35:40 -0800 |
commit | 6e129a45bc8e0ddca3f29cd07e8dabcd1b3fec6e (patch) | |
tree | d69e7264f4b56c6877f184dc7ac303bff8e8a1cd | |
parent | 2f5dc1b054f03c9a54fa3de59f7a282993040e85 (diff) | |
download | extras-6e129a45bc8e0ddca3f29cd07e8dabcd1b3fec6e.tar.gz |
Add command line tool to control MTE boot state.
Change-Id: I24271eb642a2a908fe6053a14b48d0780d5ad3a0
-rw-r--r-- | mtectrl/Android.bp | 23 | ||||
-rw-r--r-- | mtectrl/OWNERS | 5 | ||||
-rw-r--r-- | mtectrl/mtectrl.cc | 56 | ||||
-rw-r--r-- | mtectrl/mtectrl.rc | 16 |
4 files changed, 100 insertions, 0 deletions
diff --git a/mtectrl/Android.bp b/mtectrl/Android.bp new file mode 100644 index 00000000..642f9f4a --- /dev/null +++ b/mtectrl/Android.bp @@ -0,0 +1,23 @@ +// Copyright (C) 2022 The Android Open Source Project +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +cc_binary { + name: "mtectrl", + srcs: ["mtectrl.cc"], + shared_libs: [ + "libbootloader_message", + "libbase", + ], + init_rc: ["mtectrl.rc"], +} diff --git a/mtectrl/OWNERS b/mtectrl/OWNERS new file mode 100644 index 00000000..79625dfb --- /dev/null +++ b/mtectrl/OWNERS @@ -0,0 +1,5 @@ +fmayer@google.com + +eugenis@google.com +mitchp@google.com +pcc@google.com diff --git a/mtectrl/mtectrl.cc b/mtectrl/mtectrl.cc new file mode 100644 index 00000000..0738f9ec --- /dev/null +++ b/mtectrl/mtectrl.cc @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2022 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <android-base/logging.h> +#include <android-base/strings.h> +#include <bootloader_message/bootloader_message.h> + +#include <iostream> + +int main(int argc, char** argv) { + if (argc != 2) { + std::cerr + << "Usage: " << argv[0] + << " [none|memtag|memtag_once|memtag_kernel|memtag_kernel_once]\n"; + return 1; + } + std::string value = argv[1]; + misc_memtag_message m = {.version = MISC_MEMTAG_MESSAGE_VERSION, + .magic = MISC_MEMTAG_MAGIC_HEADER}; + for (const auto& field : android::base::Split(value, ",")) { + if (field == "memtag") { + m.memtag_mode |= MISC_MEMTAG_MODE_MEMTAG; + } else if (field == "memtag-once") { + m.memtag_mode |= MISC_MEMTAG_MODE_MEMTAG_ONCE; + } else if (field == "memtag-kernel") { + m.memtag_mode |= MISC_MEMTAG_MODE_MEMTAG_KERNEL; + } else if (field == "memtag-kernel-once") { + m.memtag_mode |= MISC_MEMTAG_MODE_MEMTAG_KERNEL_ONCE; + } else if (field != "none") { + LOG(ERROR) << "Unknown value for arm64.memtag.bootctl: " << field; + return 1; + } + } + std::string err; + if (!WriteMiscMemtagMessage(m, &err)) { + LOG(ERROR) << "Failed to apply arm64.memtag.bootctl: " << value << ". " + << err; + return 1; + } else { + LOG(INFO) << "Applied arm64.memtag.bootctl: " << value; + return 0; + } +} diff --git a/mtectrl/mtectrl.rc b/mtectrl/mtectrl.rc new file mode 100644 index 00000000..de042376 --- /dev/null +++ b/mtectrl/mtectrl.rc @@ -0,0 +1,16 @@ +# Copyright (C) 2022 The Android Open Source Project +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +on property:arm64.memtag.bootctl=* + exec -- /system/bin/mtectrl ${arm64.memtag.bootctl} |