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From: David Laight <David.Laight@ACULAB.COM>
To: "'Willy Tarreau'" <w@1wt.eu>, "Thomas Weißschuh" <linux@weissschuh.net>
Cc: Rodrigo Campos <rodrigo@sdfg.com.ar>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH 0/1] tools/nolibc/string: export strlen()
Date: Sat, 27 Jan 2024 21:23:01 +0000	[thread overview]
Message-ID: <512849f3c22e4f4688c20fabe017c903@AcuMS.aculab.com> (raw)
In-Reply-To: <20240127162400.GA14079@1wt.eu>

..
> Yes, once we have the proof that the compiler may produce such a call, it
> can also happen in whatever user code so we need to export the function,
> there's no other solution.

Does that mean that it you try to implement strlen() in C
gcc will generate a recursive call?

I guess an 'asm volatile("");' in the loop fix it.
Although, IIRC, you need a comment in the asm - and there
isn't a portable comment.

	David

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


  parent reply	other threads:[~2024-01-27 21:23 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-26 14:24 Rodrigo Campos
2024-01-26 14:24 ` [PATCH 1/1] " Rodrigo Campos
2024-01-27 14:53 ` [PATCH 0/1] " Thomas Weißschuh
2024-01-27 16:24   ` Willy Tarreau
2024-01-27 17:28     ` Rodrigo Campos
2024-01-27 21:23     ` David Laight [this message]
2024-01-27 21:27       ` Willy Tarreau

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