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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=xL7tn5bk8rd7QhzERnW5XDCxrWNQLuaGbP7lLdALs6Y=; b=TNuY8oXtT9YFkOJDJYC5N2dXDLXoyIAhw4u7K+N5XmkTrqY4n5ac/Er0Y8YpYUvshn F6j0ODDQjiBx2HGbfKaJoi9d5FsQri0HerbWLp4ZJpYqibPKzDIRbPd+8EeDxyTYt9XI xHBx7UIHauM5osfkWWygSkZTtO3qPU1wimZ1zaR8OidTsZMqqcwIXS81QK2djw0zFbdg UYgqIDGnRdgUDuknF+R1G8+jtWjRUQEu3ag4v8FDjXPHnwUTgyxgaclk3rGy1YWEy20A vKRAAAMGy5BHoFP5wBpMSR3eIdLR+zg4yRRMEIpdnNSDKmnqDT3t0oYwfBgUuo/ZS6q3 8IjQ== X-Gm-Message-State: AOAM530nrPy5rN5i99Qm7NqlkOWmVSNkOT+gNDcAUSFLWwNcMVon/mxB k76FkxF7jluLXat8sVT3zJ3ZZFq2j5CCmLSVwzo= X-Google-Smtp-Source: ABdhPJzJNs9VefAdVXIx8sE3q7uXvK82feETKtZCmngvw33KH61VeZxl20uF5X/PWOLcLy230cxOgVWyuUcI+4L/D/I= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:ad4:5747:: with SMTP id q7mr1648297qvx.0.1602260033580; Fri, 09 Oct 2020 09:13:53 -0700 (PDT) Date: Fri, 9 Oct 2020 09:13:15 -0700 In-Reply-To: <20201009161338.657380-1-samitolvanen@google.com> Message-Id: <20201009161338.657380-7-samitolvanen@google.com> Mime-Version: 1.0 References: <20201009161338.657380-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog Subject: [PATCH v5 06/29] x86, build: use objtool mcount From: Sami Tolvanen To: Masahiro Yamada , Will Deacon , Steven Rostedt X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201009_121357_436620_986B06C8 X-CRM114-Status: GOOD ( 12.07 ) X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-7.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:f49 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.0 DKIMWL_WL_MED DKIMwl.org - Medium trust sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, x86@kernel.org, Kees Cook , "Paul E. McKenney" , kernel-hardening@lists.openwall.com, Peter Zijlstra , Greg Kroah-Hartman , linux-kbuild@vger.kernel.org, Nick Desaulniers , linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Select HAVE_OBJTOOL_MCOUNT if STACK_VALIDATION is selected to use objtool to generate __mcount_loc sections for dynamic ftrace with Clang and gcc <5 (later versions of gcc use -mrecord-mcount). Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 5e832fd520b5..6d67646153bc 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -163,6 +163,7 @@ config X86 select HAVE_CMPXCHG_LOCAL select HAVE_CONTEXT_TRACKING if X86_64 select HAVE_C_RECORDMCOUNT + select HAVE_OBJTOOL_MCOUNT if STACK_VALIDATION select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS select HAVE_DYNAMIC_FTRACE