Date: Mon, 19 Jul 2010 12:16:41 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r210231 - stable/8/sys/amd64/amd64 Message-ID: <201007191216.o6JCGfU9062674@svn.freebsd.org>
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Author: kib Date: Mon Jul 19 12:16:41 2010 New Revision: 210231 URL: http://svn.freebsd.org/changeset/base/210231 Log: MFC r209955: When switching the thread from the processor, store %dr7 content into the pcb before disabling watchpoints. Otherwise, when the thread is restored on a processor, watchpoints are still disabled. Modified: stable/8/sys/amd64/amd64/cpu_switch.S Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) stable/8/sys/dev/xen/xenpci/ (props changed) Modified: stable/8/sys/amd64/amd64/cpu_switch.S ============================================================================== --- stable/8/sys/amd64/amd64/cpu_switch.S Mon Jul 19 10:55:44 2010 (r210230) +++ stable/8/sys/amd64/amd64/cpu_switch.S Mon Jul 19 12:16:41 2010 (r210231) @@ -245,13 +245,13 @@ store_dr: movq %dr2,%r13 movq %dr3,%r12 movq %dr6,%r11 - andq $0x0000fc00, %rax /* disable all watchpoints */ movq %r15,PCB_DR0(%r8) movq %r14,PCB_DR1(%r8) movq %r13,PCB_DR2(%r8) movq %r12,PCB_DR3(%r8) movq %r11,PCB_DR6(%r8) movq %rax,PCB_DR7(%r8) + andq $0x0000fc00, %rax /* disable all watchpoints */ movq %rax,%dr7 jmp done_store_dr
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