From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5C455C433EF for ; Thu, 14 Apr 2022 08:17:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=FlFMSotRR8QMwMHyuxdUfaZQz0Zqc2UykjolE7b1uvw=; b=uxsph+gqQxCSJh jhR8cy2o0N9/6wRkgvML64hGBzSJvPNo3dL1VTCTX71wyci60/uhQzrefdu/eo6M63LP32xYMJVOE PYWur1ct1fu1A/3odGMjPGRnM54f+eFUrwtadTtJT4Q1UeAu3Cpj4zKPmfjnvvlJhmg7/6IKoNfnn ULbwi032NwQJjpl1KKzln9gTvu6nokJ65xXuXPRdF8TqNi/LhDcHl0G1dmHwbMSaRx/kfs2ZOP+VU 9IyoF7DrQI1xB+AjTHtkpAk2ALUlQcP30Q6seNVn9ABJtCf1ffOjDND1ofAYu6OWblYaaJzjqwSvE IIyWF1uwjo1kxubbSIhg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1neufY-004VGk-Ea; Thu, 14 Apr 2022 08:17:36 +0000 Received: from mail-lj1-x235.google.com ([2a00:1450:4864:20::235]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1neufU-004VCn-CO for linux-snps-arc@lists.infradead.org; Thu, 14 Apr 2022 08:17:34 +0000 Received: by mail-lj1-x235.google.com with SMTP id 17so5094051lji.1 for ; Thu, 14 Apr 2022 01:17:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Ok57uHtbOiq3OdGSevyQ4O6t5TDKu9QFX6kVIS2Yuvs=; b=NVS4s0Zxdyxod/eLsVWei+rsc/pBTOh2c2GyW5TpBT+qgQyKlwsD2ScoyVaN4sxlu9 bD0t0z6cGn5frgZFuy4NBxbzXBWTHORNFDmq1ruvGZoHFZV1P00W8QwAulNh0cGX05F/ UviTC2TLKcKBtArNYmT0SYn87n7oeGAS9uE+cVFt3Dt0+WXRV+Z+QR6EHShtZs4gNYwM aaiNXFC1WhVhFGVCtbR0xFBpFyALaowcBCVyY+JOmG7rUqckg5LoJkqjVyB/A78BxRIs eSiha33N5WOy0VmNWCCy/Kl32G2v2HyLFRqO64Q79pFrUN2eJ6zwbxLneoOq1apsEH8z T6RA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Ok57uHtbOiq3OdGSevyQ4O6t5TDKu9QFX6kVIS2Yuvs=; b=kvpU9UNKeA2EWvka3RNx4hRYD4YctP/7L+6Nr9tLUi/DYG3H1RVA+6jLLymFIMejIB wWnPmhpfnNdrmgICAilaT0iBrlAASwAuG2aS23R1iT3ROjeTJEvVYdzHB5sXLxej9bMg qvjSN2wtD5TOLKtP/G7KT+dUvIDJVSUF23C3xmvXLh3igN3VFxJzhSya1ulrfqpUfffc DRv1dLP2HvKAQVbGHyD6FXWUVq1KAycIaPWQhqJSfsJuPsyyY9svA6Qq+ZSzSCRf+ziq kQeDmk35XhkrYCMbWtWfjNl3BGVes+q+Jr+Ww5D0qZRKw9REc7K2rkGC76B1/OLDot03 uf7Q== X-Gm-Message-State: AOAM532UzC15R/aMtpwrFS2+Jq8x6JxSuMx9GJIzjZR32ghF+TPdMlbP oRPx/PEX87w2vbZLHoMFPr+QDgqPERaZcH9c X-Google-Smtp-Source: ABdhPJyx5SsrPKKKfmixbuT8k2voaM4JDaDqeclWKwRR5jzK2777wSYny1nMuKCoaZ4ljzGN6mAHEQ== X-Received: by 2002:a2e:82cd:0:b0:24b:4a69:790b with SMTP id n13-20020a2e82cd000000b0024b4a69790bmr943651ljh.326.1649924249662; Thu, 14 Apr 2022 01:17:29 -0700 (PDT) Received: from localhost.localdomain ([5.188.167.245]) by smtp.googlemail.com with ESMTPSA id v20-20020a2e87d4000000b0024b638069b1sm117116ljj.39.2022.04.14.01.17.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Apr 2022 01:17:29 -0700 (PDT) From: Sergey Matyukevich To: linux-snps-arc@lists.infradead.org Cc: Vineet Gupta , Vladimir Isaev , Sergey Matyukevich , Sergey Matyukevich Subject: [PATCH v2 3/4] ARC: implement syscall tracepoints Date: Thu, 14 Apr 2022 11:17:23 +0300 Message-Id: <20220414081724.3177956-4-geomatsi@gmail.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220414081724.3177956-1-geomatsi@gmail.com> References: <20220414081724.3177956-1-geomatsi@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220414_011732_470914_EC28AFCE X-CRM114-Status: GOOD ( 14.31 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org From: Sergey Matyukevich Implement all the bits required to support HAVE_SYSCALL_TRACEPOINTS according to Documentation/trace/ftrace-design.rst. Signed-off-by: Sergey Matyukevich --- arch/arc/Kconfig | 1 + arch/arc/include/asm/syscall.h | 2 ++ arch/arc/include/asm/thread_info.h | 5 ++++- arch/arc/kernel/entry.S | 12 ++++++------ arch/arc/kernel/ptrace.c | 21 ++++++++++++++++++--- 5 files changed, 31 insertions(+), 10 deletions(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 3c850d0f431c..9e3653253ef2 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -39,6 +39,7 @@ config ARC select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_MOD_ARCH_SPECIFIC select HAVE_PERF_EVENTS + select HAVE_SYSCALL_TRACEPOINTS select IRQ_DOMAIN select MODULES_USE_ELF_RELA select OF diff --git a/arch/arc/include/asm/syscall.h b/arch/arc/include/asm/syscall.h index 94529e89dff0..9709256e31c8 100644 --- a/arch/arc/include/asm/syscall.h +++ b/arch/arc/include/asm/syscall.h @@ -12,6 +12,8 @@ #include #include /* in_syscall() */ +extern void *sys_call_table[]; + static inline long syscall_get_nr(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/arc/include/asm/thread_info.h b/arch/arc/include/asm/thread_info.h index 1e0b2e3914d5..6ba7fe417095 100644 --- a/arch/arc/include/asm/thread_info.h +++ b/arch/arc/include/asm/thread_info.h @@ -78,9 +78,9 @@ static inline __attribute_const__ struct thread_info *current_thread_info(void) #define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */ #define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */ #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ - /* true if poll_idle() is polling TIF_NEED_RESCHED */ #define TIF_MEMDIE 16 +#define TIF_SYSCALL_TRACEPOINT 17 /* syscall tracepoint instrumentation */ #define _TIF_SYSCALL_TRACE (1< #include +#define CREATE_TRACE_POINTS +#include + struct pt_regs_offset { const char *name; int offset; @@ -340,15 +343,27 @@ long arch_ptrace(struct task_struct *child, long request, asmlinkage int syscall_trace_entry(struct pt_regs *regs) { - if (ptrace_report_syscall_entry(regs)) - return ULONG_MAX; + if (test_thread_flag(TIF_SYSCALL_TRACE)) + if (ptrace_report_syscall_entry(regs)) + return ULONG_MAX; + +#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_enter(regs, syscall_get_nr(current, regs)); +#endif return regs->r8; } asmlinkage void syscall_trace_exit(struct pt_regs *regs) { - ptrace_report_syscall_exit(regs, 0); + if (test_thread_flag(TIF_SYSCALL_TRACE)) + ptrace_report_syscall_exit(regs, 0); + +#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_exit(regs, regs_return_value(regs)); +#endif } int regs_query_register_offset(const char *name) -- 2.35.1 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc