[PATCH] aaa

[Yury Norov]

Signed-off-by: Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx>
---
 arch/arm64/include/asm/signal32.h        |  3 ++
 arch/arm64/include/asm/signal32_common.h |  3 ++
 arch/arm64/include/asm/signal_ilp32.h    |  4 +++
 arch/arm64/kernel/ptrace.c               | 47 ++++++++++++++++++++++++++++++--
 arch/arm64/kernel/signal32.c             | 22 ---------------
 arch/arm64/kernel/signal32_common.c      | 21 ++++++++++++++
 arch/arm64/kernel/signal_ilp32.c         | 25 +----------------
 7 files changed, 76 insertions(+), 49 deletions(-)

diff --git a/arch/arm64/include/asm/signal32.h b/arch/arm64/include/asm/signal32.h
index e68fcce..1c4ede7 100644
--- a/arch/arm64/include/asm/signal32.h
+++ b/arch/arm64/include/asm/signal32.h
@@ -13,6 +13,9 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+
+#include <asm/signal32_common.h>
+
 #ifndef __ASM_SIGNAL32_H
 #define __ASM_SIGNAL32_H
 
diff --git a/arch/arm64/include/asm/signal32_common.h b/arch/arm64/include/asm/signal32_common.h
index b4f2099..e3e2d01 100644
--- a/arch/arm64/include/asm/signal32_common.h
+++ b/arch/arm64/include/asm/signal32_common.h
@@ -19,6 +19,9 @@
 int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from);
 int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from);
 
+int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set);
+int get_sigset_t(sigset_t *set, const compat_sigset_t __user *uset);
+
 #endif /* CONFIG_COMPAT*/
 
 #endif /* __ASM_SIGNAL32_COMMON_H */
diff --git a/arch/arm64/include/asm/signal_ilp32.h b/arch/arm64/include/asm/signal_ilp32.h
index 30eff23..3c6d737 100644
--- a/arch/arm64/include/asm/signal_ilp32.h
+++ b/arch/arm64/include/asm/signal_ilp32.h
@@ -11,6 +11,10 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+
+#include <asm/signal32_common.h>
+#include <asm/signal_common.h>
+
 #ifndef __ASM_SIGNAL_ILP32_H
 #define __ASM_SIGNAL_ILP32_H
 
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index e69c79a..4f0df07 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -41,6 +41,7 @@
 
 #include <asm/debug-monitors.h>
 #include <asm/pgtable.h>
+#include <asm/signal32_common.h>
 #include <asm/syscall.h>
 #include <asm/traps.h>
 #include <asm/system_misc.h>
@@ -1332,15 +1333,55 @@ COMPAT_SYSCALL_DEFINE4(aarch32_ptrace, compat_long_t, request, compat_long_t, pi
 
 #endif /* CONFIG_AARCH32_EL0 */
 
-#ifdef CONFIG_COMPAT
+#ifdef CONFIG_ARM64_ILP32
 
 long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 			compat_ulong_t caddr, compat_ulong_t cdata)
 {
-	return compat_ptrace_request(child, request, caddr, cdata);
+	sigset_t new_set;
+
+	switch (request) {
+	case PTRACE_GETSIGMASK:
+		if (caddr != sizeof(compat_sigset_t))
+			return -EINVAL;
+
+		return put_sigset_t((compat_sigset_t __user *) (u64) cdata,
+					&child->blocked);
+
+	case PTRACE_SETSIGMASK:
+		if (caddr != sizeof(compat_sigset_t))
+			return -EINVAL;
+
+		if (get_sigset_t(&new_set, (compat_sigset_t __user *) (u64) cdata))
+			return -EFAULT;
+
+		sigdelsetmask(&new_set, sigmask(SIGKILL)|sigmask(SIGSTOP));
+
+		/*
+		 * Every thread does recalc_sigpending() after resume, so
+		 * retarget_shared_pending() and recalc_sigpending() are not
+		 * called here.
+		 */
+		spin_lock_irq(&child->sighand->siglock);
+		child->blocked = new_set;
+		spin_unlock_irq(&child->sighand->siglock);
+
+		return 0;
+
+	default:
+		return compat_ptrace_request(child, request, caddr, cdata);
+	}
 }
 
-#endif /* CONFIG_COMPAT */
+#elif defined (CONFIG_COMPAT)
+
+long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+		compat_ulong_t caddr, compat_ulong_t cdata)
+{
+	return 0;
+}
+
+#endif
 
 const struct user_regset_view *task_user_regset_view(struct task_struct *task)
 {
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
index b103af3..f2c1a38 100644
--- a/arch/arm64/kernel/signal32.c
+++ b/arch/arm64/kernel/signal32.c
@@ -103,28 +103,6 @@ struct compat_rt_sigframe {
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
-static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
-{
-	compat_sigset_t	cset;
-
-	cset.sig[0] = set->sig[0] & 0xffffffffull;
-	cset.sig[1] = set->sig[0] >> 32;
-
-	return copy_to_user(uset, &cset, sizeof(*uset));
-}
-
-static inline int get_sigset_t(sigset_t *set,
-			       const compat_sigset_t __user *uset)
-{
-	compat_sigset_t s32;
-
-	if (copy_from_user(&s32, uset, sizeof(*uset)))
-		return -EFAULT;
-
-	set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
-	return 0;
-}
-
 /*
  * VFP save/restore code.
  *
diff --git a/arch/arm64/kernel/signal32_common.c b/arch/arm64/kernel/signal32_common.c
index 8fbb609..4a45aa6 100644
--- a/arch/arm64/kernel/signal32_common.c
+++ b/arch/arm64/kernel/signal32_common.c
@@ -28,6 +28,27 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 
+int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
+{
+	compat_sigset_t	cset;
+
+	cset.sig[0] = set->sig[0] & 0xffffffffull;
+	cset.sig[1] = set->sig[0] >> 32;
+
+	return copy_to_user(uset, &cset, sizeof(*uset));
+}
+
+int get_sigset_t(sigset_t *set, const compat_sigset_t __user *uset)
+{
+	compat_sigset_t s32;
+
+	if (copy_from_user(&s32, uset, sizeof(*uset)))
+		return -EFAULT;
+
+	set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
+	return 0;
+}
+
 int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from)
 {
 	int err;
diff --git a/arch/arm64/kernel/signal_ilp32.c b/arch/arm64/kernel/signal_ilp32.c
index 8ca64b9..7cc9122 100644
--- a/arch/arm64/kernel/signal_ilp32.c
+++ b/arch/arm64/kernel/signal_ilp32.c
@@ -26,8 +26,7 @@
 
 #include <asm/esr.h>
 #include <asm/fpsimd.h>
-#include <asm/signal32_common.h>
-#include <asm/signal_common.h>
+#include <asm/signal_ilp32.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include <asm/ucontext.h>
@@ -58,28 +57,6 @@ struct ilp32_rt_sigframe {
 	struct ilp32_sigframe sig;
 };
 
-static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
-{
-	compat_sigset_t cset;
-
-	cset.sig[0] = set->sig[0] & 0xffffffffull;
-	cset.sig[1] = set->sig[0] >> 32;
-
-	return copy_to_user(uset, &cset, sizeof(*uset));
-}
-
-static inline int get_sigset_t(sigset_t *set,
-                               const compat_sigset_t __user *uset)
-{
-	compat_sigset_t s32;
-
-	if (copy_from_user(&s32, uset, sizeof(*uset)))
-		return -EFAULT;
-
-	set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
-	return 0;
-}
-
 static int restore_ilp32_sigframe(struct pt_regs *regs,
                             struct ilp32_sigframe __user *sf)
 {
-- 
2.7.4