Messages in this thread |  | | | From | Roland McGrath <> | | Subject | Re: Regression in ptrace (Wine) starting with 2.6.33-rc1 | | Date | Mon, 15 Feb 2010 11:47:24 -0800 (PST) |
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> - The other one with 'locally'/'globally' enabled breakpoints.
There is no "local/global" enablement. That distinction is meaningless given the way the kernel uses the hardware. Which of those bits you set has no material effect on the watchpoint/trap behavior.
The only regression is in the observed bit pattern read back from dr7. To be 100% compatible, the hw_breakpoint ptrace-compatibility front-end should record the state of the useless bits to report back, so the only differences from the bit pattern written are whatever ones the real hardware would have shown from writing dr7 and reading it back.
Thanks, Roland
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