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From: Glenn Washburn <development@efficientek.com>
To: Jan Kiszka <jan.kiszka@siemens.com>,
	Kieran Bingham <kbingham@kernel.org>
Cc: linux-um <linux-um@lists.infradead.org>,
	Richard Weinberger <richard@nod.at>,
	Johannes Berg <johannes@sipsolutions.net>,
	Anton Ivanov <anton.ivanov@kot-begemot.co.uk>,
	linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Glenn Washburn <development@efficientek.com>
Subject: [PATCH v3 0/2] GDB: Support getting current task struct in UML
Date: Sun, 26 Feb 2023 22:05:58 -0600	[thread overview]
Message-ID: <cover.1677469905.git.development@efficientek.com> (raw)

Changes in v3:
  - Rebase onto tip.

Changes in v2:
  - Use cpu_tasks symbols instead of uml_kmalloc when determining if the
    kernel is a UML kernel.
  - Improve formatting.

Glenn

Glenn Washburn (2):
  scripts/gdb: Correct indentation in get_current_task
  scripts/gdb: Support getting current task struct in UML

 scripts/gdb/linux/cpus.py | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

Range-diff against v2:
1:  918bc1299bdb ! 1:  2e117b82240d scripts/gdb: Correct indentation in get_current_task
    @@ scripts/gdb/linux/cpus.py: def get_current_task(cpu):
          task_ptr_type = task_type.get_type().pointer()
      
          if utils.is_target_arch("x86"):
    --         var_ptr = gdb.parse_and_eval("&current_task")
    +-         var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
     -         return per_cpu(var_ptr, cpu).dereference()
    -+        var_ptr = gdb.parse_and_eval("&current_task")
    ++        var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
     +        return per_cpu(var_ptr, cpu).dereference()
          elif utils.is_target_arch("aarch64"):
     -         current_task_addr = gdb.parse_and_eval("$SP_EL0")
2:  93fc6584ea16 ! 2:  b839d611e290 scripts/gdb: Support getting current task struct in UML
    @@ scripts/gdb/linux/cpus.py: def get_current_task(cpu):
          task_ptr_type = task_type.get_type().pointer()
      
          if utils.is_target_arch("x86"):
    --        var_ptr = gdb.parse_and_eval("&current_task")
    +-        var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
     -        return per_cpu(var_ptr, cpu).dereference()
     +        if gdb.lookup_global_symbol("cpu_tasks"):
     +            # This is a UML kernel, which stores the current task
    @@ scripts/gdb/linux/cpus.py: def get_current_task(cpu):
     +            var_ptr = gdb.parse_and_eval("(struct task_struct *)cpu_tasks[0].task")
     +            return var_ptr.dereference()
     +        else:
    -+            var_ptr = gdb.parse_and_eval("&current_task")
    ++            var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
     +            return per_cpu(var_ptr, cpu).dereference()
          elif utils.is_target_arch("aarch64"):
              current_task_addr = gdb.parse_and_eval("$SP_EL0")
-- 
2.30.2


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WARNING: multiple messages have this Message-ID (diff)
From: Glenn Washburn <development@efficientek.com>
To: Jan Kiszka <jan.kiszka@siemens.com>,
	Kieran Bingham <kbingham@kernel.org>
Cc: linux-um <linux-um@lists.infradead.org>,
	Richard Weinberger <richard@nod.at>,
	Johannes Berg <johannes@sipsolutions.net>,
	Anton Ivanov <anton.ivanov@kot-begemot.co.uk>,
	linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Glenn Washburn <development@efficientek.com>
Subject: [PATCH v3 0/2] GDB: Support getting current task struct in UML
Date: Sun, 26 Feb 2023 22:05:58 -0600	[thread overview]
Message-ID: <cover.1677469905.git.development@efficientek.com> (raw)

Changes in v3:
  - Rebase onto tip.

Changes in v2:
  - Use cpu_tasks symbols instead of uml_kmalloc when determining if the
    kernel is a UML kernel.
  - Improve formatting.

Glenn

Glenn Washburn (2):
  scripts/gdb: Correct indentation in get_current_task
  scripts/gdb: Support getting current task struct in UML

 scripts/gdb/linux/cpus.py | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

Range-diff against v2:
1:  918bc1299bdb ! 1:  2e117b82240d scripts/gdb: Correct indentation in get_current_task
    @@ scripts/gdb/linux/cpus.py: def get_current_task(cpu):
          task_ptr_type = task_type.get_type().pointer()
      
          if utils.is_target_arch("x86"):
    --         var_ptr = gdb.parse_and_eval("&current_task")
    +-         var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
     -         return per_cpu(var_ptr, cpu).dereference()
    -+        var_ptr = gdb.parse_and_eval("&current_task")
    ++        var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
     +        return per_cpu(var_ptr, cpu).dereference()
          elif utils.is_target_arch("aarch64"):
     -         current_task_addr = gdb.parse_and_eval("$SP_EL0")
2:  93fc6584ea16 ! 2:  b839d611e290 scripts/gdb: Support getting current task struct in UML
    @@ scripts/gdb/linux/cpus.py: def get_current_task(cpu):
          task_ptr_type = task_type.get_type().pointer()
      
          if utils.is_target_arch("x86"):
    --        var_ptr = gdb.parse_and_eval("&current_task")
    +-        var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
     -        return per_cpu(var_ptr, cpu).dereference()
     +        if gdb.lookup_global_symbol("cpu_tasks"):
     +            # This is a UML kernel, which stores the current task
    @@ scripts/gdb/linux/cpus.py: def get_current_task(cpu):
     +            var_ptr = gdb.parse_and_eval("(struct task_struct *)cpu_tasks[0].task")
     +            return var_ptr.dereference()
     +        else:
    -+            var_ptr = gdb.parse_and_eval("&current_task")
    ++            var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
     +            return per_cpu(var_ptr, cpu).dereference()
          elif utils.is_target_arch("aarch64"):
              current_task_addr = gdb.parse_and_eval("$SP_EL0")
-- 
2.30.2


             reply	other threads:[~2023-02-27  4:06 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-27  4:05 Glenn Washburn [this message]
2023-02-27  4:05 ` [PATCH v3 0/2] GDB: Support getting current task struct in UML Glenn Washburn
2023-02-27  4:05 ` [PATCH v3 1/2] scripts/gdb: Correct indentation in get_current_task Glenn Washburn
2023-02-27  4:05   ` Glenn Washburn
2023-02-27  4:06 ` [PATCH v3 2/2] scripts/gdb: Support getting current task struct in UML Glenn Washburn
2023-02-27  4:06   ` Glenn Washburn

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