Date: Wed, 4 Aug 2010 09:56:43 +0000 (UTC) From: Tijl Coosemans <tijl@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org Subject: svn commit: r210840 - stable/7/sys/amd64/amd64 Message-ID: <201008040956.o749uhG9032997@svn.freebsd.org>
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Author: tijl Date: Wed Aug 4 09:56:43 2010 New Revision: 210840 URL: http://svn.freebsd.org/changeset/base/210840 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. Approved by: kib (mentor) Modified: stable/7/sys/amd64/amd64/cpu_switch.S Directory Properties: stable/7/sys/ (props changed) stable/7/sys/cddl/contrib/opensolaris/ (props changed) stable/7/sys/contrib/dev/acpica/ (props changed) stable/7/sys/contrib/pf/ (props changed) Modified: stable/7/sys/amd64/amd64/cpu_switch.S ============================================================================== --- stable/7/sys/amd64/amd64/cpu_switch.S Wed Aug 4 07:49:40 2010 (r210839) +++ stable/7/sys/amd64/amd64/cpu_switch.S Wed Aug 4 09:56:43 2010 (r210840) @@ -296,13 +296,13 @@ 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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