Path: csiph.com!eternal-september.org!feeder.eternal-september.org!news.unit0.net!news.panservice.it!bofh.it!news.nic.it!robomod From: Greg Kroah-Hartman Newsgroups: linux.kernel Subject: [PATCH 4.9 53/54] ARCv2: save r30 on kernel entry as gcc uses it for code-gen Date: Mon, 01 May 2017 23:40:05 +0200 Message-ID: References: X-Original-To: linux-kernel@vger.kernel.org X-Mailer: git-send-email 2.12.2 User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: robomod@news.nic.it List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Approved: robomod@news.nic.it Lines: 48 Organization: linux.* mail to news gateway X-Original-Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vineet Gupta X-Original-Date: Mon, 1 May 2017 14:32:00 -0700 X-Original-Message-ID: <20170501212633.905464200@linuxfoundation.org> X-Original-References: <20170501212631.798128131@linuxfoundation.org> X-Original-Sender: linux-kernel-owner@vger.kernel.org Xref: csiph.com linux.kernel:1633923 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vineet Gupta commit ecd43afdbe72017aefe48080631eb625e177ef4d upstream. This is not exposed to userspace debugers yet, which can be done independently as a seperate patch ! Signed-off-by: Vineet Gupta Signed-off-by: Greg Kroah-Hartman --- arch/arc/include/asm/entry-arcv2.h | 2 ++ arch/arc/include/asm/ptrace.h | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) --- a/arch/arc/include/asm/entry-arcv2.h +++ b/arch/arc/include/asm/entry-arcv2.h @@ -16,6 +16,7 @@ ; ; Now manually save: r12, sp, fp, gp, r25 + PUSH r30 PUSH r12 ; Saving pt_regs->sp correctly requires some extra work due to the way @@ -72,6 +73,7 @@ POPAX AUX_USER_SP 1: POP r12 + POP r30 .endm --- a/arch/arc/include/asm/ptrace.h +++ b/arch/arc/include/asm/ptrace.h @@ -84,7 +84,7 @@ struct pt_regs { unsigned long fp; unsigned long sp; /* user/kernel sp depending on where we came from */ - unsigned long r12; + unsigned long r12, r30; /*------- Below list auto saved by h/w -----------*/ unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;