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From: David Laight <David.Laight@aculab.com>
To: "'Mark Rutland'" <mark.rutland@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	"will@kernel.org" <will@kernel.org>
Cc: He Zhe <zhe.he@windriver.com>,
	"oleg@redhat.com" <oleg@redhat.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-audit@redhat.com" <linux-audit@redhat.com>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: RE: [PATCH 1/3] arm64: ptrace: Add is_syscall_success to handle compat
Date: Sat, 17 Apr 2021 13:19:02 +0000
Message-ID: <ba281040abc146fca5a2117d5476aa1b@AcuMS.aculab.com> (raw)
In-Reply-To: <20210416133431.GA2303@C02TD0UTHF1T.local>

From: Mark Rutland
> Sent: 16 April 2021 14:35
..
> @@ -51,13 +48,7 @@ static inline void syscall_set_return_value(struct task_struct *task,
>  					    struct pt_regs *regs,
>  					    int error, long val)
>  {
> -	if (error)
> -		val = error;
> -
> -	if (is_compat_thread(task_thread_info(task)))
> -		val = lower_32_bits(val);
> -
> -	regs->regs[0] = val;
> +	regs->regs[0] = (long) error ? error : val;

	= error ? (long)error : rval;

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)


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Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-16  7:55 He Zhe
2021-04-16  7:55 ` [PATCH 2/3] arm64: syscall.h: Add sign extension handling in syscall_get_return_value for compat He Zhe
2021-04-16  9:43   ` Oleg Nesterov
2021-04-20  8:38     ` He Zhe
2021-04-21 17:41   ` Mark Rutland
2021-04-22 16:55     ` Mark Rutland
2021-04-16  7:55 ` [PATCH 3/3] audit: Use syscall_get_return_value to get syscall return code in audit_syscall_exit He Zhe
2021-04-16 12:33 ` [PATCH 1/3] arm64: ptrace: Add is_syscall_success to handle compat Catalin Marinas
2021-04-16 13:34   ` Mark Rutland
2021-04-17 13:19     ` David Laight [this message]
2021-04-19 12:19     ` Will Deacon
2021-04-20  8:54       ` He Zhe
2021-04-21 17:10       ` Mark Rutland
2021-04-22 16:07         ` Will Deacon
2021-04-22 16:42           ` Mark Rutland
2021-04-22 18:57             ` Dmitry V. Levin
2021-04-20  8:42   ` He Zhe
2021-04-21 17:17     ` Mark Rutland

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