linux-kernel - [PATCH 0/4] arm64: kgdb/kdb: Fix single-step debugging issues

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Date:   Sun, 10 May 2020 05:41:55 +0800
From:   Wei Li <liwei391@...wei.com>
To:     <daniel.thompson@...aro.org>, <jason.wessel@...driver.com>,
        <dianders@...omium.org>, <maz@...nel.org>, <mark.rutland@....com>,
        <mhiramat@...nel.org>, <davem@...emloft.net>, <will@...nel.org>,
        <catalin.marinas@....com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <liwei1412@....com>
Subject: [PATCH 0/4] arm64: kgdb/kdb: Fix single-step debugging issues

This patch set is to fix several issues of single-step debugging
in kgdb/kdb on arm64.

It seems that these issues have been shelved a very long time,
but i still hope to solve them, as the single-step debugging
is an useful feature.

Note:
Based on patch "arm64: cacheflush: Fix KGDB trap detection",
https://www.spinics.net/lists/arm-kernel/msg803741.html

Wei Li (4):
  arm64: kgdb: Fix single-step exception handling oops
  arm64: Extract kprobes_save_local_irqflag() and
    kprobes_restore_local_irqflag()
  arm64: kgdb: Fix single-stepping into the irq handler wrongly
  arm64: kgdb: Set PSTATE.SS to 1 to reenable single-step

 arch/arm64/include/asm/debug-monitors.h |  6 ++++++
 arch/arm64/kernel/debug-monitors.c      | 28 ++++++++++++++++++++++++-
 arch/arm64/kernel/kgdb.c                | 16 +++++++++++---
 arch/arm64/kernel/probes/kprobes.c      | 28 ++-----------------------
 4 files changed, 48 insertions(+), 30 deletions(-)

-- 
2.17.1