From: Nam Cao <namcao@linutronix.de>
To: Xiaofeng Yuan <xiaofengmian@163.com>, pjw@kernel.org
Cc: palmer@dabbelt.com, aou@eecs.berkeley.edu,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
Xiaofeng Yuan <xiaofengmian@163.com>
Subject: Re: [PATCH v4] riscv: probes: simulate c.jal instruction
Date: Sat, 27 Jun 2026 13:04:05 +0200 [thread overview]
Message-ID: <875x345joa.fsf@yellow.woof> (raw)
In-Reply-To: <20260627001939.3847-1-xiaofengmian@163.com>
Xiaofeng Yuan <xiaofengmian@163.com> writes:
> The c.jal instruction is currently marked REJECTED in kprobes
> instruction decoding, but it should be SIMULATED like other
> compressed jump instructions.
>
> Add simulate_c_jal() which saves the return address to RA and
> sets the program counter to the target offset, reusing
> simulate_c_j for the common jump logic.
>
> Signed-off-by: Xiaofeng Yuan <xiaofengmian@163.com>
Reviewed-by: Nam Cao <namcao@linutronix.de>
Tested-by: Nam Cao <namcao@linutronix.de>
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WARNING: multiple messages have this Message-ID (diff)
From: Nam Cao <namcao@linutronix.de>
To: Xiaofeng Yuan <xiaofengmian@163.com>, pjw@kernel.org
Cc: palmer@dabbelt.com, aou@eecs.berkeley.edu,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
Xiaofeng Yuan <xiaofengmian@163.com>
Subject: Re: [PATCH v4] riscv: probes: simulate c.jal instruction
Date: Sat, 27 Jun 2026 13:04:05 +0200 [thread overview]
Message-ID: <875x345joa.fsf@yellow.woof> (raw)
In-Reply-To: <20260627001939.3847-1-xiaofengmian@163.com>
Xiaofeng Yuan <xiaofengmian@163.com> writes:
> The c.jal instruction is currently marked REJECTED in kprobes
> instruction decoding, but it should be SIMULATED like other
> compressed jump instructions.
>
> Add simulate_c_jal() which saves the return address to RA and
> sets the program counter to the target offset, reusing
> simulate_c_j for the common jump logic.
>
> Signed-off-by: Xiaofeng Yuan <xiaofengmian@163.com>
Reviewed-by: Nam Cao <namcao@linutronix.de>
Tested-by: Nam Cao <namcao@linutronix.de>
next prev parent reply other threads:[~2026-06-27 11:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-27 0:19 [PATCH v4] riscv: probes: simulate c.jal instruction Xiaofeng Yuan
2026-06-27 0:19 ` Xiaofeng Yuan
2026-06-27 4:21 ` Charlie Jenkins
2026-06-27 4:21 ` Charlie Jenkins
2026-06-27 10:59 ` Nam Cao
2026-06-27 10:59 ` Nam Cao
2026-06-27 11:52 ` Nam Cao
2026-06-27 11:52 ` Nam Cao
2026-06-27 11:04 ` Nam Cao [this message]
2026-06-27 11:04 ` Nam Cao
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