Re: [Crash-utility] [PATCH] Clear ununsed exception stack base

On Nov 22, 2020, at 11:00 PM, samuelliao(廖生苗) <samuelliao(a)tencent.com&gt; wrote: SEV-ES code may fill the 4th ist to VC_stack, but crash-util has no support for #VC frames. It break backtrace due the zero-size stack. So clear all unused stack base to workaround it. Signed-off-by: samuelliao <samuelliao(a)samuelliao.com&gt; --- x86_64.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/x86_64.c b/x86_64.c index 939c8a9..382cff1 100644 --- a/x86_64.c +++ b/x86_64.c @@ -1462,7 +1462,10 @@ x86_64_ist_init(void) for (i = 0; i < MAX_EXCEPTION_STACKS; i++) { if (ms->stkinfo.ebase[c][i] == 0) continue; - ms->stkinfo.ebase[c][i] -= ms->stkinfo.esize[i]; + if(ms->stkinfo.esize[i] == 0) + ms->stkinfo.ebase[c][i] = 0; + else + ms->stkinfo.ebase[c][i] -= ms->stkinfo.esize[i]; } } -- 2.18.4 -- Crash-utility mailing list Crash-utility(a)redhat.com https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.red...