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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 ARM Ltd.
*/
#ifndef __ASM_COMPAT_H
#define __ASM_COMPAT_H
#ifdef CONFIG_COMPAT
/*
* Architecture specific compatibility types
*/
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
#include <asm-generic/compat.h>
#define COMPAT_USER_HZ 100
#ifdef __AARCH64EB__
#define COMPAT_UTS_MACHINE "armv8b\0\0"
#else
#define COMPAT_UTS_MACHINE "armv8l\0\0"
#endif
typedef u16 __compat_uid_t;
typedef u16 __compat_gid_t;
typedef u16 __compat_uid16_t;
typedef u16 __compat_gid16_t;
typedef u32 __compat_uid32_t;
typedef u32 __compat_gid32_t;
typedef u16 compat_mode_t;
typedef u32 compat_dev_t;
typedef s32 compat_nlink_t;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
typedef s64 compat_s64;
typedef u64 compat_u64;
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_flock {
short l_type;
short l_whence;
compat_off_t l_start;
compat_off_t l_len;
compat_pid_t l_pid;
};
#define F_GETLK64 12 /* using 'struct flock64' */
#define F_SETLK64 13
#define F_SETLKW64 14
struct compat_flock64 {
short l_type;
short l_whence;
compat_loff_t l_start;
compat_loff_t l_len;
compat_pid_t l_pid;
};
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_RLIM_INFINITY 0xffffffff
typedef u32 compat_old_sigset_t;
#define _COMPAT_NSIG 64
#define _COMPAT_NSIG_BPW 32
typedef u32 compat_sigset_word;
#define COMPAT_OFF_T_MAX 0x7fffffff
/*
* A pointer passed in from user mode. This should not
* be used for syscall parameters, just declare them
* as pointers because the syscall entry code will have
* appropriately converted them already.
*/
static inline void __user *compat_ptr(compat_uptr_t uptr)
{
return (void __user *)(unsigned long)uptr;
}
static inline compat_uptr_t ptr_to_compat(void __user *uptr)
{
return (u32)(unsigned long)uptr;
}
#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
#define COMPAT_MINSIGSTKSZ 2048
static inline void __user *arch_compat_alloc_user_space(long len)
{
return (void __user *)compat_user_stack_pointer() - len;
}
struct compat_ipc64_perm {
compat_key_t key;
__compat_uid32_t uid;
__compat_gid32_t gid;
__compat_uid32_t cuid;
__compat_gid32_t cgid;
unsigned short mode;
unsigned short __pad1;
unsigned short seq;
unsigned short __pad2;
compat_ulong_t unused1;
compat_ulong_t unused2;
};
struct compat_semid64_ds {
struct compat_ipc64_perm sem_perm;
compat_ulong_t sem_otime;
compat_ulong_t sem_otime_high;
compat_ulong_t sem_ctime;
compat_ulong_t sem_ctime_high;
compat_ulong_t sem_nsems;
compat_ulong_t __unused3;
compat_ulong_t __unused4;
};
struct compat_msqid64_ds {
struct compat_ipc64_perm msg_perm;
compat_ulong_t msg_stime;
compat_ulong_t msg_stime_high;
compat_ulong_t msg_rtime;
compat_ulong_t msg_rtime_high;
compat_ulong_t msg_ctime;
compat_ulong_t msg_ctime_high;
compat_ulong_t msg_cbytes;
compat_ulong_t msg_qnum;
compat_ulong_t msg_qbytes;
compat_pid_t msg_lspid;
compat_pid_t msg_lrpid;
compat_ulong_t __unused4;
compat_ulong_t __unused5;
};
struct compat_shmid64_ds {
struct compat_ipc64_perm shm_perm;
compat_size_t shm_segsz;
compat_ulong_t shm_atime;
compat_ulong_t shm_atime_high;
compat_ulong_t shm_dtime;
compat_ulong_t shm_dtime_high;
compat_ulong_t shm_ctime;
compat_ulong_t shm_ctime_high;
compat_pid_t shm_cpid;
compat_pid_t shm_lpid;
compat_ulong_t shm_nattch;
compat_ulong_t __unused4;
compat_ulong_t __unused5;
};
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);
}
#else /* !CONFIG_COMPAT */
static inline int is_compat_thread(struct thread_info *thread)
{
return 0;
}
#endif /* CONFIG_COMPAT */
#endif /* __ASM_COMPAT_H */
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