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-rw-r--r--arch/arm64/include/asm/compat.h109
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 */