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| author | Konstantin Belousov <kib@FreeBSD.org> | 2010-07-12 19:59:15 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2010-07-12 19:59:15 +0000 |
| commit | aaa95ccb5067bca6dee8c7f66933b56072b58132 (patch) | |
| tree | 3569dff85433762dac57a5ef9a8e7c3b8cc6cdbf | |
| parent | a32e2a86af600573694a6fbab895ee800f3ab737 (diff) | |
| download | src-aaa95ccb5067bca6dee8c7f66933b56072b58132.tar.gz src-aaa95ccb5067bca6dee8c7f66933b56072b58132.zip | |
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.
Submitted by: Tijl Coosemans <tijl coosemans org>
(I would be much happier if Tijl commited this himself)
MFC after: 1 week
Notes
Notes:
svn path=/head/; revision=209955
| -rw-r--r-- | sys/amd64/amd64/cpu_switch.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/amd64/amd64/cpu_switch.S b/sys/amd64/amd64/cpu_switch.S index cfb4204f9568..6b5c6632fbb2 100644 --- a/sys/amd64/amd64/cpu_switch.S +++ b/sys/amd64/amd64/cpu_switch.S @@ -243,13 +243,13 @@ 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 |