This patchset makes handle_q_memtag, handle_q_isaddresstagged, and handle_Q_memtag stubs build for system mode, allowing all GDB 'memory-tag' subcommands to work with QEMU gdbstub on aarch64 system mode.
It also extends the MTE gdbstub tests to run in system mode, sharing the tests between user mode and system mode. For running the tests, a GDB that supports MTE for baremetal targets is necessary. The patch for this support is currently under review [0]. For convenience, this patch is available in this GDB branch [1], and GDB can be built and installed into a /tmp directory in a straightforward way. After cloning [1], in a 'build' directory, configure GDB to build: $ git clone --depth 1 https://github.com/gromero/binutils-gdb.git --branch mte_baremetal mte_baremetal && cd mte_baremetal $ mkdir build && cd build $ ../configure --disable-binutils --disable-ld --disable-gold --disable-gas --disable-sim --disable-gprof --disable-gprofng --with-python=python3 --enable-libctf --enable-unit-tests --prefix=/tmp/gdb --with-additional-debug-dirs=/usr/lib/debug --enable-targets=all $ make -j 32 $ make install Configure QEMU, specifying where GDB is installed. For example: $ cd build $ ../configure --target-list=aarch64-linux-user,aarch64-softmmu --disable-docs --gdb=/tmp/gdb/bin/gdb $ make -j 32 $ cd.. And, finally, run the MTE gdbstub tests for system mode: $ make -C build -j 32 run-tcg-tests-aarch64-softmmu Cheers, Gustavo [0] https://sourceware.org/pipermail/gdb-patches/2024-July/210584.html [1] https://github.com/gromero/binutils-gdb/tree/mte_baremetal Gustavo Romero (4): gdbstub: Use specific MMU index when probing MTE addresses gdbstub: Add support for MTE in system mode tests/guest-debug: Support passing arguments to the GDB test script tests/tcg/aarch64: Extend MTE gdbstub tests to system mode target/arm/gdbstub64.c | 21 +++++++---- tests/guest-debug/run-test.py | 4 +++ tests/tcg/aarch64/Makefile.softmmu-target | 36 +++++++++++++++++-- tests/tcg/aarch64/Makefile.target | 3 +- tests/tcg/aarch64/gdbstub/test-mte.py | 44 +++++++++++++++-------- tests/tcg/aarch64/system/boot.S | 26 ++++++++++++-- tests/tcg/aarch64/system/kernel.ld | 5 +++ tests/tcg/aarch64/system/mte.c | 40 +++++++++++++++++++++ 8 files changed, 151 insertions(+), 28 deletions(-) create mode 100644 tests/tcg/aarch64/system/mte.c -- 2.34.1
