Date: Fri, 22 Dec 2017 21:26:22 -0800 From: Mark Millard <markmi@dsl-only.net> To: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>, FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: TARGET_ARCH=powerpc64 jump from head -r326192 to -r327075: g_event crashes with "instruction storage interrupt" Message-ID: <39C042C5-9800-464C-84AC-677DB45DA1C1@dsl-only.net>
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[Note: I experiment with using clang as the build and system compiler for TARGET_ARCH=3Dpowerpc64 .] I attempted to update a old so-called PowerMac "Quad Core" from head -r326192 to -r328075, noting special instructions that have been published. (This was a non-debug kernel build.) Unfortunately around the: . . . cd0: 66.700MB/s transfers (UDMA4, ATPI 12bytes, PIO 65534bytes) cd0: Attempt Trying to mount from ufs:/dev/ufs/FBSDG5Lrootfs [rw,noatime]. . . There ends up being a repeatable kernel trap: (transcribed from pictures, but with notes added) fatal kernel trap: (NOTE: The above can be the line before the "Trying to mount" line, after the "cd0: Attempt" line.) exception =3D 0x400 (instruction storage interrupt) virtual address =3D 0x3c4c009438427518 srr0 =3D 0x3c4c009438427518 srr1 =3D 0x9000000040009032 lr =3D 0x14234e8 curthread =3D 0x3d52a80 pid =3D 13, comm =3D g_event [ thread pid 13 tid 100019 ] Stopped at 0x3c4c009438427518 It reports: Tracing command geom pid 13 tid 100019 td 0x3d52a80 (CPU 0) 0xC0000000032966b0: at g_new_provider_event+0x144 0xC0000000032966f0: at g_run_events+0x530 0xC000000003296830: at g_event_procbody+0x94 0xC000000003296860: at fork_exit+0xd8 0xC0000000032968f0: at fork_trampoline+0x18 0xC000000003296920: at blocked_loop+0x38 These details do not vary between attempts. =46rom what I gather the code jumped to 0x3c4c009438427518 but that is not from an executable page for the context at the time. On the -r326192 powerpc system /dev/ufs/FBSDG5Lrootfs mounts just fine. =3D=3D=3D Mark Millard markmi at dsl-only.net
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