1 files changed, 109 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
new file mode 100644
index 0000000000..ae904a1ad5
--- /dev/null
+++ b/arch/arm64/include/asm/compat.h
@@ -0,0 +1,109 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ */
+#ifndef __ASM_COMPAT_H
+#define __ASM_COMPAT_H
+
+#define compat_mode_t compat_mode_t
+typedef u16		compat_mode_t;
+
+#define __compat_uid_t	__compat_uid_t
+typedef u16		__compat_uid_t;
+typedef u16		__compat_gid_t;
+
+#define compat_ipc_pid_t compat_ipc_pid_t
+typedef u16		compat_ipc_pid_t;
+
+#define compat_statfs	compat_statfs
+
+#include <asm-generic/compat.h>
+
+#ifdef CONFIG_COMPAT
+
+/*
+ * Architecture specific compatibility types
+ */
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/sched/task_stack.h>
+
+#ifdef __AARCH64EB__
+#define COMPAT_UTS_MACHINE	"armv8b\0\0"
+#else
+#define COMPAT_UTS_MACHINE	"armv8l\0\0"
+#endif
+
+typedef u16		__compat_uid16_t;
+typedef u16		__compat_gid16_t;
+typedef s32		compat_nlink_t;
+
+struct compat_stat {
+#ifdef __AARCH64EB__
+	short		st_dev;
+	short		__pad1;
+#else
+	compat_dev_t	st_dev;
+#endif
+	compat_ino_t	st_ino;
+	compat_mode_t	st_mode;
+	compat_ushort_t	st_nlink;
+	__compat_uid16_t	st_uid;
+	__compat_gid16_t	st_gid;
+#ifdef __AARCH64EB__
+	short		st_rdev;
+	short		__pad2;
+#else
+	compat_dev_t	st_rdev;
+#endif
+	compat_off_t	st_size;
+	compat_off_t	st_blksize;
+	compat_off_t	st_blocks;
+	old_time32_t	st_atime;
+	compat_ulong_t	st_atime_nsec;
+	old_time32_t	st_mtime;
+	compat_ulong_t	st_mtime_nsec;
+	old_time32_t	st_ctime;
+	compat_ulong_t	st_ctime_nsec;
+	compat_ulong_t	__unused4[2];
+};
+
+struct compat_statfs {
+	int		f_type;
+	int		f_bsize;
+	int		f_blocks;
+	int		f_bfree;
+	int		f_bavail;
+	int		f_files;
+	int		f_ffree;
+	compat_fsid_t	f_fsid;
+	int		f_namelen;	/* SunOS ignores this field. */
+	int		f_frsize;
+	int		f_flags;
+	int		f_spare[4];
+};
+
+#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
+#define COMPAT_MINSIGSTKSZ	2048
+
+static inline int is_compat_task(void)
+{
+	return test_thread_flag(TIF_32BIT);
+}
+
+static inline int is_compat_thread(struct thread_info *thread)
+{
+	return test_ti_thread_flag(thread, TIF_32BIT);
+}
+
+long compat_arm_syscall(struct pt_regs *regs, int scno);
+
+#else /* !CONFIG_COMPAT */
+
+static inline int is_compat_thread(struct thread_info *thread)
+{
+	return 0;
+}
+
+#endif /* CONFIG_COMPAT */
+#endif /* __ASM_COMPAT_H */