[PING] [PATCH v4 00/25] Memory Tagging Support + AArch64 Linux implementation
Luis Machado
luis.machado@linaro.org
Tue Jan 26 16:36:52 GMT 2021
Hi Simon,
On 1/26/21 1:26 PM, Simon Marchi wrote:
> Just wondering, do you intend to update the settings as suggested here?
>
Sorry. I've done it already, but it is on a local branch. I wasn't sure
about spamming the list with another 26 e-mails.
But I can do so if it makes life easier, since it will carry all the
updates we discussed recently.
> https://sourceware.org/pipermail/gdb-patches/2021-January/175198.html
>
> Simon
>
> On 2021-01-26 8:03 a.m., Luis Machado via Gdb-patches wrote:
>>
>> On 1/15/21 1:02 PM, Luis Machado wrote:
>>> Ping?
>>>
>>> On 12/30/20 12:38 PM, Luis Machado wrote:
>>>> Memory tagging improves memory safety by tagging various parts of memory and
>>>> raising exceptions when the allocation tag (the one associated with a range of
>>>> memory addresses) does not match the logical tag contained in a pointer that is
>>>> used to access the memory area.
>>>>
>>>> We already have an implementation of such a mechanism for sparc64 (ADI), but
>>>> it is target-specific and not exposed to the rest of GDB. This series aims to
>>>> make the infrastructure available to other targets that may wish to support
>>>> their specific memory tagging approaches. For AArch64 Linux this is called
>>>> MTE (Memory Tagging Extensions).
>>>>
>>>> The series is split into a set that deals with generic changes to GDB's
>>>> infrastructure (target methods, gdbarch hooks and remote packets), a set that
>>>> implements support for AArch64 Linux and one last set that implements new
>>>> commands, updates the documentation and adds tests.
>>>>
>>>> The goal is to make it so the architecture independent parts of GDB don't
>>>> need to interpret tag formats, given the formats are likely different
>>>> for each architecture. For this reason, GDB will handle tags as a sequence of
>>>> bytes and will not assume a particular format.
>>>>
>>>> The architecture-specific code can handle the sequence of bytes appropriately.
>>>>
>>>> Luis Machado (25):
>>>> New target methods for memory tagging support
>>>> New gdbarch memory tagging hooks
>>>> Add GDB-side remote target support for memory tagging
>>>> Unit testing for GDB-side remote memory tagging handling
>>>> GDBserver remote packet support for memory tagging
>>>> Unit tests for gdbserver memory tagging remote packets
>>>> Documentation for memory tagging remote packets
>>>> AArch64: Add MTE CPU feature check support
>>>> AArch64: Add target description/feature for MTE registers
>>>> AArch64: Add MTE register set support for GDB and gdbserver
>>>> AArch64: Add MTE ptrace requests
>>>> AArch64: Implement memory tagging target methods for AArch64
>>>> Convert char array to std::string in linux_find_memory_regions_full
>>>> Refactor parsing of /proc/<pid>/smaps
>>>> AArch64: Implement the memory tagging gdbarch hooks
>>>> AArch64: Add unit testing for logical tag set/get operations
>>>> AArch64: Report tag violation error information
>>>> AArch64: Add gdbserver MTE support
>>>> AArch64: Add MTE register set support for core files
>>>> New memory-tag commands
>>>> Documentation for the new mtag commands
>>>> Extend "x" and "print" commands to support memory tagging
>>>> Document new "x" and "print" memory tagging extensions
>>>> Add NEWS entry.
>>>> Add memory tagging testcases
>>>>
>>>> gdb/Makefile.in | 3 +
>>>> gdb/NEWS | 36 +-
>>>> gdb/aarch64-linux-nat.c | 127 ++++++-
>>>> gdb/aarch64-linux-tdep.c | 336 +++++++++++++++++-
>>>> gdb/aarch64-linux-tdep.h | 3 +
>>>> gdb/aarch64-tdep.c | 40 ++-
>>>> gdb/aarch64-tdep.h | 12 +-
>>>> gdb/arch-utils.c | 50 +++
>>>> gdb/arch-utils.h | 23 ++
>>>> gdb/arch/aarch64-mte-linux.c | 73 ++++
>>>> gdb/arch/aarch64-mte-linux.h | 75 ++++
>>>> gdb/arch/aarch64.c | 7 +-
>>>> gdb/arch/aarch64.h | 7 +-
>>>> gdb/configure.nat | 3 +-
>>>> gdb/configure.tgt | 1 +
>>>> gdb/doc/gdb.texinfo | 233 +++++++++++-
>>>> gdb/features/Makefile | 1 +
>>>> gdb/features/aarch64-mte.c | 14 +
>>>> gdb/features/aarch64-mte.xml | 11 +
>>>> gdb/gdbarch.c | 137 ++++++++
>>>> gdb/gdbarch.h | 53 +++
>>>> gdb/gdbarch.sh | 36 ++
>>>> gdb/linux-tdep.c | 378 +++++++++++++-------
>>>> gdb/linux-tdep.h | 4 +
>>>> gdb/nat/aarch64-mte-linux-ptrace.c | 200 +++++++++++
>>>> gdb/nat/aarch64-mte-linux-ptrace.h | 50 +++
>>>> gdb/printcmd.c | 468 ++++++++++++++++++++++++-
>>>> gdb/remote.c | 227 ++++++++++++
>>>> gdb/target-debug.h | 24 ++
>>>> gdb/target-delegates.c | 95 +++++
>>>> gdb/target.h | 41 +++
>>>> gdb/testsuite/gdb.arch/aarch64-mte.c | 107 ++++++
>>>> gdb/testsuite/gdb.arch/aarch64-mte.exp | 369 +++++++++++++++++++
>>>> gdb/testsuite/gdb.base/memtag.c | 22 ++
>>>> gdb/testsuite/gdb.base/memtag.exp | 66 ++++
>>>> gdb/testsuite/lib/gdb.exp | 16 +
>>>> gdb/valprint.h | 1 +
>>>> gdbserver/Makefile.in | 1 +
>>>> gdbserver/configure.srv | 2 +
>>>> gdbserver/linux-aarch64-ipa.cc | 8 +-
>>>> gdbserver/linux-aarch64-low.cc | 97 ++++-
>>>> gdbserver/linux-aarch64-tdesc.cc | 10 +-
>>>> gdbserver/linux-aarch64-tdesc.h | 3 +-
>>>> gdbserver/remote-utils.cc | 43 ++-
>>>> gdbserver/remote-utils.h | 7 +-
>>>> gdbserver/server.cc | 219 ++++++++++++
>>>> gdbserver/server.h | 3 +
>>>> gdbserver/target.cc | 20 ++
>>>> gdbserver/target.h | 21 ++
>>>> gdbsupport/common-utils.cc | 49 +++
>>>> gdbsupport/common-utils.h | 15 +
>>>> gdbsupport/rsp-low.cc | 49 ---
>>>> gdbsupport/rsp-low.h | 19 -
>>>> include/elf/common.h | 3 +
>>>> 54 files changed, 3654 insertions(+), 264 deletions(-)
>>>> create mode 100644 gdb/arch/aarch64-mte-linux.c
>>>> create mode 100644 gdb/arch/aarch64-mte-linux.h
>>>> create mode 100644 gdb/features/aarch64-mte.c
>>>> create mode 100644 gdb/features/aarch64-mte.xml
>>>> create mode 100644 gdb/nat/aarch64-mte-linux-ptrace.c
>>>> create mode 100644 gdb/nat/aarch64-mte-linux-ptrace.h
>>>> create mode 100644 gdb/testsuite/gdb.arch/aarch64-mte.c
>>>> create mode 100644 gdb/testsuite/gdb.arch/aarch64-mte.exp
>>>> create mode 100644 gdb/testsuite/gdb.base/memtag.c
>>>> create mode 100644 gdb/testsuite/gdb.base/memtag.exp
>>>>
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