Date: 28 Apr 1999 11:00:41 +0200 From: Dag-Erling Smorgrav <des@flood.ping.uio.no> To: shocking@prth.pgs.com (Stephen Hocking-Senior Programmer PGS Tensor Perth) Cc: hackers@FreeBSD.ORG Subject: Re: Porting Linux Device drivers Message-ID: <xzplnfd5dc6.fsf@flood.ping.uio.no> In-Reply-To: shocking@prth.pgs.com's message of "Mon, 26 Apr 1999 12:31:27 %2B0800" References: <199904260431.MAA04537@ariadne.tensor.pgs.com>
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shocking@prth.pgs.com (Stephen Hocking-Senior Programmer PGS Tensor Perth) writes: > The problem I'm having is that I'm using the glide Linux > binaries to test the device, and the positive return values are being > trapped somewhere and turned into -1, an obvious failure which the > Linux glide library interprets as an error, spitting the dummy. The userland part of the syscall mechanism stores the returned value in errno and returns ((ret == 0) ? p_retval[0] : -1). Hence, if you want to return a specific value, store it in p_retval[0] and return 0 to indicate success. DES -- Dag-Erling Smorgrav - des@flood.ping.uio.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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