Date: Sat, 07 Feb 2026 21:24:56 +0000 From: bugzilla-noreply@freebsd.org To: ppc@FreeBSD.org Subject: [Bug 293035] [powerpc64] [power8] [hwpmc] [panic] when capturing userland trace in kernel mode Message-ID: <bug-293035-21@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293035 Bug ID: 293035 Summary: [powerpc64] [power8] [hwpmc] [panic] when capturing userland trace in kernel mode Product: Base System Version: 16.0-CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: powerpc Assignee: ppc@FreeBSD.org Reporter: adrian@freebsd.org ``` 0xc00800000ac3f170: at panic+0x40 0xc00800000ac3f1a0: at pmc_capture_user_callchain+0x48c 0xc00800000ac3f2d0: at pmc_hook_handler+0xd10 0xc00800000ac3f460: at userret+0x1f0 0xc00800000ac3f500: at trap+0xf70 0xc00800000ac3f610: at trap+0x618 0xc00800000ac3f740: at powerpc_interrupt+0x1cc 0xc00800000ac3f7d0: user SC trap by 0x8019e49a0: srr1=0x900000000280f933 r1=0xfffffbfffdd10 cr=0x44420c28 xer=0 ctr=0x8019e4990 r2=0x801a054a0 frame=0xc00800000ac3f800 KDB: enter: panic [ thread pid 72434 tid 102861 ] Stopped at kdb_enter+0x70: ori r0, r0, 0x0 db> db> ``` This is on FreeBSD-HEAD, 7-Feb-2026 To reproduce: * fire up a POWER8 box * kldload hwpmc * pmcstat -U -S pm_cyc -l 2 -O sample.out -- You are receiving this mail because: You are the assignee for the bug.home | help
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