Date: Tue, 26 Apr 2016 02:48:43 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-ports-bugs@FreeBSD.org Subject: [Bug 209061] devel/gdb: Fix gdb/i386 built on older kernels Message-ID: <bug-209061-13@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209061 Bug ID: 209061 Summary: devel/gdb: Fix gdb/i386 built on older kernels Product: Ports & Packages Version: Latest Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: Individual Port(s) Assignee: freebsd-ports-bugs@FreeBSD.org Reporter: jhb@FreeBSD.org CC: luca.pizzamiglio@gmail.com, trasz@FreeBSD.org Flags: maintainer-feedback?(luca.pizzamiglio@gmail.com) CC: luca.pizzamiglio@gmail.com Created attachment 169704 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D169704&action= =3Dedit kgdb_i386.patch The kgdb targets use runtime assertions on native targets to verify that the helper arrays documenting the layout of things like the PCB and trapframe structures match. Ideally these asserts would be compile time assertions, = but they cannot be checked at compile time. Instead, they are checked at runti= me during gdb startup. However, the layout of the i386 PCB changed when the AVX changes were merge= d to i386. The constants in the i386 target assume the post-AVX layout, but gdb packages on stable branches might be built against pre-AVX worlds. In that case, those gdb binaries will trigger these assertions on every invocation. As a workaround, disable the PCB-related assertions on pre-AVX worlds. If = kgdb is run against a pre-AVX kernel it will not be able to parse the PCB correc= tly, but userland debugging should work fine. kgdb built against a pre-AVX world but against an AVX kernel should work fine. --=20 You are receiving this mail because: You are the assignee for the bug.=
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