linux-kernel - [PATCH v2 0/5] LoongArch: ftrace: Add direct call support and code simplification

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1682561552-32324-1-git-send-email-tangyouling@loongson.cn>
Date:   Thu, 27 Apr 2023 10:12:27 +0800
From:   Youling Tang <tangyouling@...ngson.cn>
To:     Huacai Chen <chenhuacai@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     WANG Xuerui <kernel@...0n.name>, linux-kernel@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
        loongson-kernel@...ts.loongnix.cn
Subject: [PATCH v2 0/5] LoongArch: ftrace: Add direct call support and code simplification

[Patch 1-2]: Fix build errors and simplify code.

[Patch 3-4]:
This series adds DYNAMIC_FTRACE_WITH_DIRECT_CALLS support for LoongArch.
SAMPLE_FTRACE_DIRECT and SAMPLE_FTRACE_DIRECT_MULTI are also included
here as the samples for testing DIRECT_CALLS related interface.

Part of the code refers to arm64 and riscv.

The following tests have been passed in my local 3A5000 machine.
 - ftrace*.ko
 - tools/testing/selftests/ftrace/

eg:
[loongson@...ux linux]$ sudo insmod samples/ftrace/ftrace-direct-too.ko
[root@...ux linux]# cat /sys/kernel/debug/tracing/trace | tail
           rmmod-4552    [001] .....  3166.654540: 0xffff800002094040: handle mm fault vma=00000000d0dbdb16 address=7ffff2a793e8 flags=254
           rmmod-4552    [001] .....  3166.654550: 0xffff800002094040: handle mm fault vma=0000000047694d8b address=555570700008 flags=255
           rmmod-4552    [001] .....  3166.654557: 0xffff800002094040: handle mm fault vma=00000000d0dbdb16 address=7ffff29e6eb0 flags=254
           rmmod-4552    [001] .....  3166.654561: 0xffff800002094040: handle mm fault vma=00000000d0dbdb16 address=7ffff297d480 flags=254

[Patch 5]: Abstract DYNAMIC_FTRACE_WITH_ARGS accesses.
Note: This patch depends on regs_set_return_value() in the patch
"LoongArch: Add support for function error injection".


Changes in v2:
 - Rewrite commit message.

Qing Zhang (1):
  LoongArch: Abstract DYNAMIC_FTRACE_WITH_ARGS accesses

Youling Tang (4):
  LoongArch: Fix build error if CONFIG_DYNAMIC_FTRACE_WITH_REGS is not
    set
  LoongArch: ftrace: Implement ftrace_find_callable_addr() to simplify
    code
  LoongArch: ftrace: Add direct call support
  LoongArch: ftrace: Add direct call trampoline samples support

 arch/loongarch/Kconfig                      |   3 +
 arch/loongarch/include/asm/ftrace.h         |  37 ++++++
 arch/loongarch/kernel/ftrace_dyn.c          | 132 +++++++++++---------
 arch/loongarch/kernel/mcount_dyn.S          |   7 +-
 samples/ftrace/ftrace-direct-modify.c       |  34 +++++
 samples/ftrace/ftrace-direct-multi-modify.c |  41 ++++++
 samples/ftrace/ftrace-direct-multi.c        |  25 ++++
 samples/ftrace/ftrace-direct-too.c          |  27 ++++
 samples/ftrace/ftrace-direct.c              |  23 ++++
 9 files changed, 266 insertions(+), 63 deletions(-)

-- 
2.37.1