forked from mirrors/linux
fb37397594
While converting compat system call handlers to work on 32-bit architectures, I found a number of types used in those handlers that are identical between all architectures. Let's move all the identical ones into asm-generic/compat.h to avoid having to add even more identical definitions of those types. For unknown reasons, mips defines __compat_gid32_t, __compat_uid32_t and compat_caddr_t as signed, while all others have them unsigned. This seems to be a mistake, but I'm leaving it alone here. The other types all differ by size or alignment on at least on architecture. compat_aio_context_t is currently defined in linux/compat.h but also needed for compat_sys_io_getevents(), so let's move it into the same place. While we still have not decided whether the 32-bit time handling will always use the compat syscalls, or in which form, I think this is a useful cleanup that we can merge regardless. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
200 lines
4.3 KiB
C
200 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_COMPAT_H
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#define _ASM_POWERPC_COMPAT_H
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#ifdef __KERNEL__
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/*
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* Architecture specific compatibility types
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*/
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <asm-generic/compat.h>
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#define COMPAT_USER_HZ 100
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#ifdef __BIG_ENDIAN__
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#define COMPAT_UTS_MACHINE "ppc\0\0"
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#else
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#define COMPAT_UTS_MACHINE "ppcle\0\0"
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#endif
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typedef u32 __compat_uid_t;
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typedef u32 __compat_gid_t;
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typedef u32 __compat_uid32_t;
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typedef u32 __compat_gid32_t;
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typedef u32 compat_mode_t;
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typedef u32 compat_dev_t;
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typedef s16 compat_nlink_t;
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typedef u16 compat_ipc_pid_t;
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typedef u32 compat_caddr_t;
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typedef __kernel_fsid_t compat_fsid_t;
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typedef s64 compat_s64;
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typedef u64 compat_u64;
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struct compat_stat {
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compat_dev_t st_dev;
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compat_ino_t st_ino;
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compat_mode_t st_mode;
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compat_nlink_t st_nlink;
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__compat_uid32_t st_uid;
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__compat_gid32_t st_gid;
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compat_dev_t st_rdev;
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compat_off_t st_size;
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compat_off_t st_blksize;
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compat_off_t st_blocks;
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old_time32_t st_atime;
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u32 st_atime_nsec;
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old_time32_t st_mtime;
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u32 st_mtime_nsec;
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old_time32_t st_ctime;
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u32 st_ctime_nsec;
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u32 __unused4[2];
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};
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struct compat_flock {
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short l_type;
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short l_whence;
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compat_off_t l_start;
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compat_off_t l_len;
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compat_pid_t l_pid;
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};
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#define F_GETLK64 12 /* using 'struct flock64' */
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#define F_SETLK64 13
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#define F_SETLKW64 14
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struct compat_flock64 {
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short l_type;
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short l_whence;
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compat_loff_t l_start;
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compat_loff_t l_len;
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compat_pid_t l_pid;
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};
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struct compat_statfs {
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int f_type;
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int f_bsize;
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int f_blocks;
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int f_bfree;
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int f_bavail;
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int f_files;
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int f_ffree;
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compat_fsid_t f_fsid;
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int f_namelen; /* SunOS ignores this field. */
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int f_frsize;
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int f_flags;
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int f_spare[4];
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};
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#define COMPAT_RLIM_INFINITY 0xffffffff
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typedef u32 compat_old_sigset_t;
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#define _COMPAT_NSIG 64
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#define _COMPAT_NSIG_BPW 32
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typedef u32 compat_sigset_word;
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#define COMPAT_OFF_T_MAX 0x7fffffff
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/*
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* A pointer passed in from user mode. This should not
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* be used for syscall parameters, just declare them
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* as pointers because the syscall entry code will have
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* appropriately converted them already.
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*/
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static inline void __user *compat_ptr(compat_uptr_t uptr)
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{
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return (void __user *)(unsigned long)uptr;
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}
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static inline compat_uptr_t ptr_to_compat(void __user *uptr)
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{
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return (u32)(unsigned long)uptr;
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}
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static inline void __user *arch_compat_alloc_user_space(long len)
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{
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struct pt_regs *regs = current->thread.regs;
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unsigned long usp = regs->gpr[1];
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/*
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* We can't access below the stack pointer in the 32bit ABI and
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* can access 288 bytes in the 64bit big-endian ABI,
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* or 512 bytes with the new ELFv2 little-endian ABI.
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*/
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if (!is_32bit_task())
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usp -= USER_REDZONE_SIZE;
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return (void __user *) (usp - len);
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}
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/*
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* ipc64_perm is actually 32/64bit clean but since the compat layer refers to
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* it we may as well define it.
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*/
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struct compat_ipc64_perm {
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compat_key_t key;
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__compat_uid_t uid;
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__compat_gid_t gid;
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__compat_uid_t cuid;
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__compat_gid_t cgid;
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compat_mode_t mode;
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unsigned int seq;
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unsigned int __pad2;
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unsigned long __unused1; /* yes they really are 64bit pads */
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unsigned long __unused2;
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};
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struct compat_semid64_ds {
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struct compat_ipc64_perm sem_perm;
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unsigned int sem_otime_high;
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unsigned int sem_otime;
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unsigned int sem_ctime_high;
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unsigned int sem_ctime;
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compat_ulong_t sem_nsems;
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compat_ulong_t __unused3;
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compat_ulong_t __unused4;
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};
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struct compat_msqid64_ds {
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struct compat_ipc64_perm msg_perm;
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unsigned int msg_stime_high;
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unsigned int msg_stime;
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unsigned int msg_rtime_high;
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unsigned int msg_rtime;
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unsigned int msg_ctime_high;
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unsigned int msg_ctime;
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compat_ulong_t msg_cbytes;
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compat_ulong_t msg_qnum;
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compat_ulong_t msg_qbytes;
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compat_pid_t msg_lspid;
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compat_pid_t msg_lrpid;
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compat_ulong_t __unused4;
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compat_ulong_t __unused5;
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};
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struct compat_shmid64_ds {
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struct compat_ipc64_perm shm_perm;
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unsigned int shm_atime_high;
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unsigned int shm_atime;
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unsigned int shm_dtime_high;
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unsigned int shm_dtime;
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unsigned int shm_ctime_high;
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unsigned int shm_ctime;
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unsigned int __unused4;
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compat_size_t shm_segsz;
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compat_pid_t shm_cpid;
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compat_pid_t shm_lpid;
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compat_ulong_t shm_nattch;
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compat_ulong_t __unused5;
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compat_ulong_t __unused6;
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};
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static inline int is_compat_task(void)
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{
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return is_32bit_task();
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}
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_COMPAT_H */
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