From patchwork Mon Feb 26 21:03:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella X-Patchwork-Id: 26076 Received: (qmail 73689 invoked by alias); 26 Feb 2018 21:03:48 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 73127 invoked by uid 89); 26 Feb 2018 21:03:47 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-26.0 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, RCVD_IN_DNSWL_NONE, SPF_PASS autolearn=ham version=3.3.2 spammy= X-HELO: mail-qt0-f180.google.com X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references; bh=7rJUZ/2PnzRy3pNlmT8RDxltSHh/W0KAjEtLfwj1ZOA=; b=X5UIt/Q4oqBF2RMniJZbdUccfcP8et/DIZt6fDjYcd+X9LAE9/RIyD/B836LsqYHG1 N37iHQr/MlPh9NlUkE+IIzAhzS+CQdgqURweB9BzMvacqVL8Z2lhQrgiIx0rIuD4jvdT PykF9JgpnxIPki8oaUfPrjhqQBrI/N1rBkr4uxy3DUkzsgxbnEgGtdejda6L45z1HW8u IF1HjzL9rru9iqI16OaZ2u7Q0aPVXVlOBmhCaxLbHA9A2VOdapaxGFvmaUDnxdqWgQm1 vnYXGXaVrnYmP36HaBVn3MIA4G6CcEJ1V+ExCzWkCGVpLTBswYqXI5O2GEhK/XwNGrsh 51xg== X-Gm-Message-State: APf1xPCP2lviNrtXTtGIY/VgLe7cR7L6RLdwnHgYoWTqTrwnR/64FTl/ huummD7RFB0gUxVa/zA6qfKYkoVUQFc= X-Google-Smtp-Source: AG47ELuLE7V2bniCXY6dpstk8msd0lPayYirdRmu0+mZEjWNqPqcGPOOypek6M3oZy3GK8GN5UpogA== X-Received: by 10.200.58.230 with SMTP id x93mr19951005qte.72.1519679024799; Mon, 26 Feb 2018 13:03:44 -0800 (PST) From: Adhemerval Zanella To: libc-alpha@sourceware.org Subject: [PATCH v2 01/21] powerpc: Create stackframe information on syscall Date: Mon, 26 Feb 2018 18:03:16 -0300 Message-Id: <1519679016-12241-2-git-send-email-adhemerval.zanella@linaro.org> In-Reply-To: <1519679016-12241-1-git-send-email-adhemerval.zanella@linaro.org> References: <1519679016-12241-1-git-send-email-adhemerval.zanella@linaro.org> This patch adds a minimal stackframe creation on powerpc syscall implementation so backtrace works correctly on a signal handler. Checked on powerpc64le-linux-gnu. * sysdeps/unix/sysv/linux/powerpc/syscall.S (syscall): Create stack frame. --- ChangeLog | 3 +++ sysdeps/unix/sysv/linux/powerpc/syscall.S | 14 ++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/sysdeps/unix/sysv/linux/powerpc/syscall.S b/sysdeps/unix/sysv/linux/powerpc/syscall.S index 2da9172..fae0fe8 100644 --- a/sysdeps/unix/sysv/linux/powerpc/syscall.S +++ b/sysdeps/unix/sysv/linux/powerpc/syscall.S @@ -19,6 +19,14 @@ ENTRY (syscall) ABORT_TRANSACTION + /* Creates a minimum stack frame so backtrace works. */ +#ifdef __powerpc64__ + stdu r1, -FRAME_MIN_SIZE (r1) + cfi_adjust_cfa_offset (FRAME_MIN_SIZE) +#else + stwu r1,-16(1) + cfi_def_cfa_offset (16) +#endif mr r0,r3 mr r3,r4 mr r4,r5 @@ -26,6 +34,12 @@ ENTRY (syscall) mr r6,r7 mr r7,r8 mr r8,r9 +#ifdef __powerpc64__ + addi r1, r1, FRAME_MIN_SIZE +#else + addi r1,r1,16 +#endif + cfi_def_cfa_offset (0) sc PSEUDO_RET PSEUDO_END (syscall)