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[182.249.87.116]) by mx.google.com with ESMTPSA id cf12sm36225005pdb.77.2014.11.17.17.11.56 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 17 Nov 2014 17:12:00 -0800 (PST) From: AKASHI Takahiro To: keescook@chromium.org, catalin.marinas@arm.com, will.deacon@arm.com Subject: [PATCH v8 5/6] arm64: add SIGSYS siginfo for compat task Date: Tue, 18 Nov 2014 10:10:37 +0900 Message-Id: <1416273038-15590-6-git-send-email-takahiro.akashi@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1416273038-15590-1-git-send-email-takahiro.akashi@linaro.org> References: <1416273038-15590-1-git-send-email-takahiro.akashi@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141117_171217_447160_36AB4507 X-CRM114-Status: GOOD ( 11.40 ) X-Spam-Score: -0.7 (/) Cc: linaro-kernel@lists.linaro.org, arndb@arndb.de, linux-kernel@vger.kernel.org, AKASHI Takahiro , dsaxena@linaro.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP SIGSYS is primarily used in secure computing to notify tracer of syscall events. This patch allows signal handler on compat task to get correct information with SA_SIGINFO specified when this signal is delivered. Reviewed-by: Kees Cook Signed-off-by: AKASHI Takahiro --- arch/arm64/include/asm/compat.h | 7 +++++++ arch/arm64/kernel/signal32.c | 6 ++++++ 2 files changed, 13 insertions(+) diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h index 56de5aa..3fb053f 100644 --- a/arch/arm64/include/asm/compat.h +++ b/arch/arm64/include/asm/compat.h @@ -205,6 +205,13 @@ typedef struct compat_siginfo { compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ int _fd; } _sigpoll; + + /* SIGSYS */ + struct { + compat_uptr_t _call_addr; /* calling user insn */ + int _syscall; /* triggering system call number */ + compat_uint_t _arch; /* AUDIT_ARCH_* of syscall */ + } _sigsys; } _sifields; } compat_siginfo_t; diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c index 1b9ad02..5a1ba6e 100644 --- a/arch/arm64/kernel/signal32.c +++ b/arch/arm64/kernel/signal32.c @@ -186,6 +186,12 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from) err |= __put_user(from->si_uid, &to->si_uid); err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr, &to->si_ptr); break; + case __SI_SYS: + err |= __put_user((compat_uptr_t)(unsigned long) + from->si_call_addr, &to->si_call_addr); + err |= __put_user(from->si_syscall, &to->si_syscall); + err |= __put_user(from->si_arch, &to->si_arch); + break; default: /* this is just in case for now ... */ err |= __put_user(from->si_pid, &to->si_pid); err |= __put_user(from->si_uid, &to->si_uid);