Date: Wed, 20 Jan 2021 12:46:39 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 252860] arm64 PT_GETDBREGS does not expose watchpoint registers Message-ID: <bug-252860-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252860 Bug ID: 252860 Summary: arm64 PT_GETDBREGS does not expose watchpoint registers Product: Base System Version: CURRENT Hardware: arm64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: mgorny@gentoo.org We're working on improving arm64/FreeBSD support in LLDB, and we've noticed that -- unless we're mistaken -- the kernel code responsible for PT_GETDBREGS and PT_SETDBREGS handles breakpoint registers only. I'm specifically referring to the fill_dbregs() function at: https://cgit.freebsd.org/src/tree/sys/arm64/arm64/machdep.c?id=5f66d5a313bf2b2254de92b2915e48e5cf528893#n320 It needs to be extended to include watchpoint registers if we're going to use hardware watchpoints on FreeBSD. However, I'm not really sure how to do that without breaking the ABI -- though I'm not sure if anything is actually using it at this point. -- You are receiving this mail because: You are the assignee for the bug.home | help
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