[PATCH v6 15/21] arm64: signal: share lp64 signal routines to ilp32

Yury Norov
2016-01-14T17:23:12Z

After that, it will be possible to reuse it in ilp32.

Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
---
arch/arm64/include/asm/signal_common.h | 39 ++++++++++++++++++++++++++++++++++
arch/arm64/kernel/signal.c | 17 ++++++---------
2 files changed, 45 insertions(+), 11 deletions(-)
create mode 100644 arch/arm64/include/asm/signal_common.h

diff --git a/arch/arm64/include/asm/signal_common.h b/arch/arm64/include/asm/signal_common.h
new file mode 100644
index 0000000..faa82c0
--- /dev/null
+++ b/arch/arm64/include/asm/signal_common.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 1995-2009 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ * Copyright (C) 2016 Cavium Networks.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ASM_SIGNAL_COMMON_H
+#define __ASM_SIGNAL_COMMON_H
+
+#include <linux/uaccess.h>
+#include <asm/ucontext.h>
+#include <asm/fpsimd.h>
+
+struct sigframe {
+ struct ucontext uc;
+ u64 fp;
+ u64 lr;
+};
+
+int preserve_fpsimd_context(struct fpsimd_context __user *ctx);
+int restore_fpsimd_context(struct fpsimd_context __user *ctx);
+int setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set);
+int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf);
+void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
+ void __user *frame, off_t sigframe_off, int usig);
+
+#endif /* __ASM_SIGNAL_COMMON_H */
diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index 20dca65..a742a61 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -34,12 +34,7 @@
#include <asm/fpsimd.h>
#include <asm/signal32.h>
#include <asm/vdso.h>
-
-struct sigframe {
- struct ucontext uc;
- u64 fp;
- u64 lr;
-};
+#include <asm/signal_common.h>

/*
* Do a signal return; undo the signal stack. These are aligned to 128-bit.
@@ -49,7 +44,7 @@ struct rt_sigframe {
struct sigframe sig;
};

-static int preserve_fpsimd_context(struct fpsimd_context __user *ctx)
+int preserve_fpsimd_context(struct fpsimd_context __user *ctx)
{
struct fpsimd_state *fpsimd = &current->thread.fpsimd_state;
int err;
@@ -69,7 +64,7 @@ static int preserve_fpsimd_context(struct fpsimd_context __user *ctx)
return err ? -EFAULT : 0;
}

-static int restore_fpsimd_context(struct fpsimd_context __user *ctx)
+int restore_fpsimd_context(struct fpsimd_context __user *ctx)
{
struct fpsimd_state fpsimd;
__u32 magic, size;
@@ -96,7 +91,7 @@ static int restore_fpsimd_context(struct fpsimd_context __user *ctx)
return err ? -EFAULT : 0;
}

-static int restore_sigframe(struct pt_regs *regs,
+int restore_sigframe(struct pt_regs *regs,
struct sigframe __user *sf)
{
sigset_t set;
@@ -166,7 +161,7 @@ badframe:
return 0;
}

-static int setup_sigframe(struct sigframe __user *sf,
+int setup_sigframe(struct sigframe __user *sf,
struct pt_regs *regs, sigset_t *set)
{
int i, err = 0;
@@ -233,7 +228,7 @@ static struct rt_sigframe __user *get_sigframe(struct ksignal *ksig,
return frame;
}

-static void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
+void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
void __user *frame, off_t sigframe_off, int usig)
{
__sigrestore_t sigtramp;
--
2.5.0