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From: Markus Metzger <mmetzger@sourceware.org> To: gdb-cvs@sourceware.org Subject: [binutils-gdb] gdb, btrace: fix family and model computation Date: Fri, 28 Oct 2022 06:47:54 +0000 (GMT) [thread overview] Message-ID: <20221028064801.6DAB43857837@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=d9757bcd43534875d2003962944d3d130289f82c commit d9757bcd43534875d2003962944d3d130289f82c Author: Markus Metzger <markus.t.metzger@intel.com> Date: Thu Oct 20 16:27:34 2022 +0200 gdb, btrace: fix family and model computation In gdb/nat/linux-btrace.c:btrace_this_cpu() we initialize the cpu structure given to the libipt btrace decoder. We only consider the extended model field for family 0x6 and forget about family 0xf and we don't consider the extended family field. Fix it. Diff: --- gdb/nat/linux-btrace.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/gdb/nat/linux-btrace.c b/gdb/nat/linux-btrace.c index 4911630ba5c..a951f3b56aa 100644 --- a/gdb/nat/linux-btrace.c +++ b/gdb/nat/linux-btrace.c @@ -84,9 +84,11 @@ btrace_this_cpu (void) cpu.vendor = CV_INTEL; cpu.family = (cpuid >> 8) & 0xf; - cpu.model = (cpuid >> 4) & 0xf; + if (cpu.family == 0xf) + cpu.family += (cpuid >> 20) & 0xff; - if (cpu.family == 0x6) + cpu.model = (cpuid >> 4) & 0xf; + if ((cpu.family == 0x6) || ((cpu.family & 0xf) == 0xf)) cpu.model += (cpuid >> 12) & 0xf0; } }
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