Date: Tue, 13 Nov 2012 22:34:33 GMT From: Robert Watson <rwatson@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 219774 for review Message-ID: <201211132234.qADMYXrq044129@skunkworks.freebsd.org>
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http://p4web.freebsd.org/@@219774?ac=10 Change 219774 by rwatson@rwatson_zenith_cl_cam_ac_uk on 2012/11/13 22:34:24 In a cheritest sandbox, invoke getpid() to make sure that the kernel's syscall blocking counter is incremented properly. Affected files ... .. //depot/projects/ctsrd/cheribsd/src/libexec/cheritest-helper/cheritest-helper.c#5 edit Differences ... ==== //depot/projects/ctsrd/cheribsd/src/libexec/cheritest-helper/cheritest-helper.c#5 (text+ko) ==== @@ -58,5 +58,12 @@ } MD5End(&md5context, buf); memcpy_tocap(2, buf, 0, sizeof(buf)); + + /* + * Invoke getpid() to trigger kernel protection features. Should + * mostly be a nop. + */ + __asm__ __volatile__ ("syscall 20"); + return (123456); }
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