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To: will.deacon@arm.com, mark.rutland@arm.com, catalin.marinas@arm.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <1588132911-64901-1-git-send-email-jiping.ma2@windriver.com> From: Jiping Ma Message-ID: <32a473bb-2760-b967-5d54-a22677b8018d@windriver.com> Date: Wed, 29 Apr 2020 12:51:55 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 In-Reply-To: <1588132911-64901-1-git-send-email-jiping.ma2@windriver.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-ClientProxiedBy: HKAPR04CA0016.apcprd04.prod.outlook.com (2603:1096:203:d0::26) To CH2PR11MB4215.namprd11.prod.outlook.com (2603:10b6:610:3b::26) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [128.224.162.195] (60.247.85.82) by HKAPR04CA0016.apcprd04.prod.outlook.com (2603:1096:203:d0::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2937.13 via Frontend Transport; Wed, 29 Apr 2020 04:52:00 +0000 X-Originating-IP: [60.247.85.82] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 653e200b-cb5e-4da3-9ef5-08d7ebf90ec6 X-MS-TrafficTypeDiagnostic: CH2PR11MB4392: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3383; X-Forefront-PRVS: 03883BD916 X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CH2PR11MB4215.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFTY:;SFS:(136003)(366004)(39850400004)(396003)(376002)(346002)(5660300002)(31686004)(66946007)(66556008)(16576012)(66476007)(316002)(4744005)(8676002)(36756003)(26005)(2616005)(31696002)(2906002)(6486002)(52116002)(16526019)(186003)(8936002)(4326008)(86362001)(53546011)(6666004)(956004)(478600001)(6706004)(78286006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: windriver.com X-MS-Exchange-CrossTenant-Network-Message-Id: 653e200b-cb5e-4da3-9ef5-08d7ebf90ec6 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Apr 2020 04:52:02.8293 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 8ddb2873-a1ad-4a18-ae4e-4644631433be X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: DCrqYddevwHvwG1AujpCHFEbRurnMbG8SqYkR99b0LBtt9cN6bbmCSufVK6le8M87u54qFf88eK18hlxuC2hFQTKwr+Phwfs0KvTBvc+2/Q= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR11MB4392 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We test it as the following steps. # gcc -g -mthumb -gdwarf -o test test.c # export CALLGRAPH=dwarf #(./perftest ./test profiling 1; cd ./profiling/; perf script) Thanks, Jiping On 04/29/2020 12:01 PM, Jiping Ma wrote: > Record PC value from regs[15], it should be regs[32], which cause perf > parser the backtrace failed. > > Signed-off-by: Jiping Ma > --- > arch/arm64/kernel/perf_regs.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/arm64/kernel/perf_regs.c b/arch/arm64/kernel/perf_regs.c > index 0bbac61..04088e6 100644 > --- a/arch/arm64/kernel/perf_regs.c > +++ b/arch/arm64/kernel/perf_regs.c > @@ -32,6 +32,10 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) > if ((u32)idx == PERF_REG_ARM64_PC) > return regs->pc; > > + if (perf_reg_abi(current) == PERF_SAMPLE_REGS_ABI_32 > + && idx == 15) > + return regs->regs[PERF_REG_ARM64_PC]; > + > return regs->regs[idx]; > } >