From: Song Shuai <suagrfillet@gmail.com>
To: jan.kiszka@siemens.com, kbingham@kernel.org,
paul.walmsley@sifive.com, palmer@dabbelt.com,
aou@eecs.berkeley.edu
Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
Song Shuai <suagrfillet@gmail.com>
Subject: [PATCH RESEND] scripts/gdb: add lx_current support for riscv
Date: Wed, 22 Feb 2023 17:37:30 +0800 [thread overview]
Message-ID: <20230222093730.1826523-1-suagrfillet@gmail.com> (raw)
RISC-V uses the tp register to save the current task_struct address
as its current() defines. So lx_current() of riscv just returns the
dereference of the address cast via task_ptr_type.
Signed-off-by: Song Shuai <suagrfillet@gmail.com>
---
scripts/gdb/linux/cpus.py | 3 +++
1 file changed, 3 insertions(+)
diff --git a/scripts/gdb/linux/cpus.py b/scripts/gdb/linux/cpus.py
index 15fc4626d236..6825a9834394 100644
--- a/scripts/gdb/linux/cpus.py
+++ b/scripts/gdb/linux/cpus.py
@@ -173,6 +173,9 @@ def get_current_task(cpu):
else:
raise gdb.GdbError("Sorry, obtaining the current task is not allowed "
"while running in userspace(EL0)")
+ elif utils.is_target_arch("riscv"):
+ current_task_addr = gdb.parse_and_eval("$tp")
+ return current_task_addr.cast(task_ptr_type).dereference()
else:
raise gdb.GdbError("Sorry, obtaining the current task is not yet "
"supported with this arch")
--
2.20.1
next reply other threads:[~2023-02-22 9:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-22 9:37 Song Shuai [this message]
2023-02-22 9:52 ` Conor Dooley
2023-02-22 10:13 ` Song Shuai
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