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("¤t_task")
+- var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
- return per_cpu(var_ptr, cpu).dereference()
-+ var_ptr = gdb.parse_and_eval("¤t_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("$SP_EL0")
2: 93fc6584ea16 ! 2: b839d611e290 scripts/gdb: Support getting current task struct in UML
@@ scripts/gdb/linux/cpus.py: def get_current_task(cpu):
task_ptr_type = task_type.get_type().pointer()
if utils.is_target_arch("x86"):
-- var_ptr = gdb.parse_and_eval("¤t_task")
+- var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
- return per_cpu(var_ptr, cpu).dereference()
+ if gdb.lookup_global_symbol("cpu_tasks"):
+ # This is a UML kernel, which stores the current task
@@ scripts/gdb/linux/cpus.py: def get_current_task(cpu):
+ var_ptr = gdb.parse_and_eval("(struct task_struct *)cpu_tasks[0].task")
+ return var_ptr.dereference()
+ else:
-+ var_ptr = gdb.parse_and_eval("¤t_task")
++ var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
+ return per_cpu(var_ptr, cpu).dereference()
elif utils.is_target_arch("aarch64"):
current_task_addr = gdb.parse_and_eval("$SP_EL0")
--
2.30.2
next reply other threads:[~2023-02-27 4:06 UTC|newest]
Thread overview: 3+ 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 1/2] scripts/gdb: Correct indentation in get_current_task Glenn Washburn
2023-02-27 4:06 ` [PATCH v3 2/2] scripts/gdb: Support getting current task struct in UML Glenn Washburn
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=cover.1677469905.git.development@efficientek.com \
--to=development@efficientek.com \
--cc=akpm@linux-foundation.org \
--cc=anton.ivanov@kot-begemot.co.uk \
--cc=jan.kiszka@siemens.com \
--cc=johannes@sipsolutions.net \
--cc=kbingham@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-um@lists.infradead.org \
--cc=richard@nod.at \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox