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Diffstat (limited to 'arch/arm64/include/asm/compat.h')
| -rw-r--r-- | arch/arm64/include/asm/compat.h | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h new file mode 100644 index 000000000..23a9fb73c --- /dev/null +++ b/arch/arm64/include/asm/compat.h @@ -0,0 +1,199 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2012 ARM Ltd. + */ +#ifndef __ASM_COMPAT_H +#define __ASM_COMPAT_H + +#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> + +#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; + +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 + +#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 */ |