mirror of
https://github.com/brain-hackers/linux-brain.git
synced 2024-06-09 23:36:23 +09:00
9afc5eee65
Christoph Hellwig suggested a slightly different path for handling backwards compatibility with the 32-bit time_t based system calls: Rather than simply reusing the compat_sys_* entry points on 32-bit architectures unchanged, we get rid of those entry points and the compat_time types by renaming them to something that makes more sense on 32-bit architectures (which don't have a compat mode otherwise), and then share the entry points under the new name with the 64-bit architectures that use them for implementing the compatibility. The following types and interfaces are renamed here, and moved from linux/compat_time.h to linux/time32.h: old new --- --- compat_time_t old_time32_t struct compat_timeval struct old_timeval32 struct compat_timespec struct old_timespec32 struct compat_itimerspec struct old_itimerspec32 ns_to_compat_timeval() ns_to_old_timeval32() get_compat_itimerspec64() get_old_itimerspec32() put_compat_itimerspec64() put_old_itimerspec32() compat_get_timespec64() get_old_timespec32() compat_put_timespec64() put_old_timespec32() As we already have aliases in place, this patch addresses only the instances that are relevant to the system call interface in particular, not those that occur in device drivers and other modules. Those will get handled separately, while providing the 64-bit version of the respective interfaces. I'm not renaming the timex, rusage and itimerval structures, as we are still debating what the new interface will look like, and whether we will need a replacement at all. This also doesn't change the names of the syscall entry points, which can be done more easily when we actually switch over the 32-bit architectures to use them, at that point we need to change COMPAT_SYSCALL_DEFINEx to SYSCALL_DEFINEx with a new name, e.g. with a _time32 suffix. Suggested-by: Christoph Hellwig <hch@infradead.org> Link: https://lore.kernel.org/lkml/20180705222110.GA5698@infradead.org/ Signed-off-by: Arnd Bergmann <arnd@arndb.de>
252 lines
5.2 KiB
C
252 lines
5.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_SPARC64_COMPAT_H
|
|
#define _ASM_SPARC64_COMPAT_H
|
|
/*
|
|
* Architecture specific compatibility types
|
|
*/
|
|
#include <linux/types.h>
|
|
|
|
#define COMPAT_USER_HZ 100
|
|
#define COMPAT_UTS_MACHINE "sparc\0\0"
|
|
|
|
typedef u32 compat_size_t;
|
|
typedef s32 compat_ssize_t;
|
|
typedef s32 compat_clock_t;
|
|
typedef s32 compat_pid_t;
|
|
typedef u16 __compat_uid_t;
|
|
typedef u16 __compat_gid_t;
|
|
typedef u32 __compat_uid32_t;
|
|
typedef u32 __compat_gid32_t;
|
|
typedef u16 compat_mode_t;
|
|
typedef u32 compat_ino_t;
|
|
typedef u16 compat_dev_t;
|
|
typedef s32 compat_off_t;
|
|
typedef s64 compat_loff_t;
|
|
typedef s16 compat_nlink_t;
|
|
typedef u16 compat_ipc_pid_t;
|
|
typedef s32 compat_daddr_t;
|
|
typedef u32 compat_caddr_t;
|
|
typedef __kernel_fsid_t compat_fsid_t;
|
|
typedef s32 compat_key_t;
|
|
typedef s32 compat_timer_t;
|
|
|
|
typedef s32 compat_int_t;
|
|
typedef s32 compat_long_t;
|
|
typedef s64 compat_s64;
|
|
typedef u32 compat_uint_t;
|
|
typedef u32 compat_ulong_t;
|
|
typedef u64 compat_u64;
|
|
typedef u32 compat_uptr_t;
|
|
|
|
struct compat_stat {
|
|
compat_dev_t st_dev;
|
|
compat_ino_t st_ino;
|
|
compat_mode_t st_mode;
|
|
compat_nlink_t st_nlink;
|
|
__compat_uid_t st_uid;
|
|
__compat_gid_t st_gid;
|
|
compat_dev_t st_rdev;
|
|
compat_off_t st_size;
|
|
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_off_t st_blksize;
|
|
compat_off_t st_blocks;
|
|
u32 __unused4[2];
|
|
};
|
|
|
|
struct compat_stat64 {
|
|
unsigned long long st_dev;
|
|
|
|
unsigned long long st_ino;
|
|
|
|
unsigned int st_mode;
|
|
unsigned int st_nlink;
|
|
|
|
unsigned int st_uid;
|
|
unsigned int st_gid;
|
|
|
|
unsigned long long st_rdev;
|
|
|
|
unsigned char __pad3[8];
|
|
|
|
long long st_size;
|
|
unsigned int st_blksize;
|
|
|
|
unsigned char __pad4[8];
|
|
unsigned int st_blocks;
|
|
|
|
unsigned int st_atime;
|
|
unsigned int st_atime_nsec;
|
|
|
|
unsigned int st_mtime;
|
|
unsigned int st_mtime_nsec;
|
|
|
|
unsigned int st_ctime;
|
|
unsigned int st_ctime_nsec;
|
|
|
|
unsigned int __unused4;
|
|
unsigned int __unused5;
|
|
};
|
|
|
|
struct compat_flock {
|
|
short l_type;
|
|
short l_whence;
|
|
compat_off_t l_start;
|
|
compat_off_t l_len;
|
|
compat_pid_t l_pid;
|
|
short __unused;
|
|
};
|
|
|
|
#define F_GETLK64 12
|
|
#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;
|
|
short __unused;
|
|
};
|
|
|
|
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 0x7fffffff
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static inline void __user *arch_compat_alloc_user_space(long len)
|
|
{
|
|
struct pt_regs *regs = current_thread_info()->kregs;
|
|
unsigned long usp = regs->u_regs[UREG_I6];
|
|
|
|
if (test_thread_64bit_stack(usp))
|
|
usp += STACK_BIAS;
|
|
|
|
if (test_thread_flag(TIF_32BIT))
|
|
usp &= 0xffffffffUL;
|
|
|
|
usp -= len;
|
|
usp &= ~0x7UL;
|
|
|
|
return (void __user *) usp;
|
|
}
|
|
#endif
|
|
|
|
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 __pad1;
|
|
compat_mode_t mode;
|
|
unsigned short __pad2;
|
|
unsigned short seq;
|
|
unsigned long __unused1; /* yes they really are 64bit pads */
|
|
unsigned long __unused2;
|
|
};
|
|
|
|
struct compat_semid64_ds {
|
|
struct compat_ipc64_perm sem_perm;
|
|
unsigned int sem_otime_high;
|
|
unsigned int sem_otime;
|
|
unsigned int sem_ctime_high;
|
|
unsigned int sem_ctime;
|
|
u32 sem_nsems;
|
|
u32 __unused1;
|
|
u32 __unused2;
|
|
};
|
|
|
|
struct compat_msqid64_ds {
|
|
struct compat_ipc64_perm msg_perm;
|
|
unsigned int msg_stime_high;
|
|
unsigned int msg_stime;
|
|
unsigned int msg_rtime_high;
|
|
unsigned int msg_rtime;
|
|
unsigned int msg_ctime_high;
|
|
unsigned int msg_ctime;
|
|
unsigned int msg_cbytes;
|
|
unsigned int msg_qnum;
|
|
unsigned int msg_qbytes;
|
|
compat_pid_t msg_lspid;
|
|
compat_pid_t msg_lrpid;
|
|
unsigned int __unused1;
|
|
unsigned int __unused2;
|
|
};
|
|
|
|
struct compat_shmid64_ds {
|
|
struct compat_ipc64_perm shm_perm;
|
|
unsigned int shm_atime_high;
|
|
unsigned int shm_atime;
|
|
unsigned int shm_dtime_high;
|
|
unsigned int shm_dtime;
|
|
unsigned int shm_ctime_high;
|
|
unsigned int shm_ctime;
|
|
compat_size_t shm_segsz;
|
|
compat_pid_t shm_cpid;
|
|
compat_pid_t shm_lpid;
|
|
unsigned int shm_nattch;
|
|
unsigned int __unused1;
|
|
unsigned int __unused2;
|
|
};
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static inline int is_compat_task(void)
|
|
{
|
|
return test_thread_flag(TIF_32BIT);
|
|
}
|
|
|
|
static inline bool in_compat_syscall(void)
|
|
{
|
|
/* Vector 0x110 is LINUX_32BIT_SYSCALL_TRAP */
|
|
return pt_regs_trap_type(current_pt_regs()) == 0x110;
|
|
}
|
|
#define in_compat_syscall in_compat_syscall
|
|
#endif
|
|
|
|
#endif /* _ASM_SPARC64_COMPAT_H */
|