linux-kernel - Re: [PATCH v4 0/5] Powerpc/Watchpoint: Few important fixes

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Date:   Wed, 9 Oct 2019 15:37:44 +0200
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>, mpe@...erman.id.au,
        mikey@...ling.org
Cc:     npiggin@...il.com, benh@...nel.crashing.org, paulus@...ba.org,
        naveen.n.rao@...ux.vnet.ibm.com, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/5] Powerpc/Watchpoint: Few important fixes



Le 07/10/2019 à 08:35, Ravi Bangoria a écrit :
> 
> 
> On 9/25/19 9:36 AM, Ravi Bangoria wrote:
>> v3: https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-July/193339.html
>>
>> v3->v4:
>>   - Instead of considering exception as extraneous when dar is outside of
>>     user specified range, analyse the instruction and check for overlap
>>     between user specified range and actual load/store range.
>>   - Add selftest for the same in perf-hwbreak.c
>>   - Make ptrace-hwbreak.c selftest more strict by checking address in
>>     check_success.
>>   - Support for 8xx in ptrace-hwbreak.c selftest (Build tested only)
>>   - Rebase to powerpc/next
>>
>> @Christope, Can you please check Patch 5. I've just build-tested it
>> with ep88xc_defconfig.
> 
> @mpe, @mikey, Any feedback?
> 
> @Christophe, Is patch5 works for you on 8xx?
> 

Getting the following :

root@...ip:~# ./ptrace-hwbreak
test: ptrace-hwbreak
tags: git_version:v5.4-rc2-710-gf0082e173fe4-dirty
PTRACE_SET_DEBUGREG, WO, len: 1: Ok
PTRACE_SET_DEBUGREG, WO, len: 2: Ok
PTRACE_SET_DEBUGREG, WO, len: 4: Ok
PTRACE_SET_DEBUGREG, WO, len: 8: Ok
PTRACE_SET_DEBUGREG, RO, len: 1: Ok
PTRACE_SET_DEBUGREG, RO, len: 2: Ok
PTRACE_SET_DEBUGREG, RO, len: 4: Ok
PTRACE_SET_DEBUGREG, RO, len: 8: Ok
PTRACE_SET_DEBUGREG, RW, len: 1: Ok
PTRACE_SET_DEBUGREG, RW, len: 2: Ok
PTRACE_SET_DEBUGREG, RW, len: 4: Ok
PTRACE_SET_DEBUGREG, RW, len: 8: Ok
PPC_PTRACE_SETHWDEBUG, MODE_EXACT, WO, len: 1: Ok
PPC_PTRACE_SETHWDEBUG, MODE_EXACT, RO, len: 1: Ok
PPC_PTRACE_SETHWDEBUG, MODE_EXACT, RW, len: 1: Ok
PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED, WO, len: 6: Ok
PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED, RO, len: 6: Fail
failure: ptrace-hwbreak

Christophe