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211 lines
4.5 KiB
211 lines
4.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_COMPAT_H |
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#define _ASM_X86_COMPAT_H |
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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 <linux/sched/task_stack.h> |
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#include <asm/processor.h> |
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#include <asm/user32.h> |
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#include <asm/unistd.h> |
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#include <asm-generic/compat.h> |
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#define COMPAT_USER_HZ 100 |
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#define COMPAT_UTS_MACHINE "i686\0\0" |
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typedef u16 __compat_uid_t; |
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typedef u16 __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 u16 compat_mode_t; |
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typedef u16 compat_dev_t; |
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typedef u16 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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struct compat_stat { |
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compat_dev_t st_dev; |
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u16 __pad1; |
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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_uid_t st_uid; |
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__compat_gid_t st_gid; |
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compat_dev_t st_rdev; |
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u16 __pad2; |
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u32 st_size; |
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u32 st_blksize; |
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u32 st_blocks; |
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u32 st_atime; |
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u32 st_atime_nsec; |
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u32 st_mtime; |
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u32 st_mtime_nsec; |
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u32 st_ctime; |
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u32 st_ctime_nsec; |
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u32 __unused4; |
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u32 __unused5; |
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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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/* |
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* IA32 uses 4 byte alignment for 64 bit quantities, |
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* so we need to pack this structure. |
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*/ |
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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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} __attribute__((packed)); |
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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; /* at least 32 bits */ |
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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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struct compat_ipc64_perm { |
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compat_key_t key; |
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__compat_uid32_t uid; |
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__compat_gid32_t gid; |
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__compat_uid32_t cuid; |
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__compat_gid32_t cgid; |
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unsigned short mode; |
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unsigned short __pad1; |
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unsigned short seq; |
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unsigned short __pad2; |
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compat_ulong_t unused1; |
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compat_ulong_t 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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compat_ulong_t sem_otime; |
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compat_ulong_t sem_otime_high; |
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compat_ulong_t sem_ctime; |
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compat_ulong_t sem_ctime_high; |
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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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compat_ulong_t msg_stime; |
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compat_ulong_t msg_stime_high; |
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compat_ulong_t msg_rtime; |
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compat_ulong_t msg_rtime_high; |
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compat_ulong_t msg_ctime; |
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compat_ulong_t msg_ctime_high; |
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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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compat_size_t shm_segsz; |
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compat_ulong_t shm_atime; |
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compat_ulong_t shm_atime_high; |
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compat_ulong_t shm_dtime; |
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compat_ulong_t shm_dtime_high; |
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compat_ulong_t shm_ctime; |
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compat_ulong_t shm_ctime_high; |
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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 __unused4; |
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compat_ulong_t __unused5; |
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}; |
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#ifdef CONFIG_X86_X32_ABI |
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#define COMPAT_USE_64BIT_TIME \ |
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(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) |
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#endif |
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static inline void __user *arch_compat_alloc_user_space(long len) |
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{ |
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compat_uptr_t sp = task_pt_regs(current)->sp; |
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/* |
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* -128 for the x32 ABI redzone. For IA32, it is not strictly |
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* necessary, but not harmful. |
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*/ |
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sp -= 128; |
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return (void __user *)round_down(sp - len, 16); |
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} |
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static inline bool in_x32_syscall(void) |
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{ |
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#ifdef CONFIG_X86_X32_ABI |
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if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) |
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return true; |
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#endif |
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return false; |
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} |
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static inline bool in_32bit_syscall(void) |
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{ |
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return in_ia32_syscall() || in_x32_syscall(); |
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} |
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#ifdef CONFIG_COMPAT |
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static inline bool in_compat_syscall(void) |
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{ |
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return in_32bit_syscall(); |
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} |
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#define in_compat_syscall in_compat_syscall /* override the generic impl */ |
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#define compat_need_64bit_alignment_fixup in_ia32_syscall |
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#endif |
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struct compat_siginfo; |
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#ifdef CONFIG_X86_X32_ABI |
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int copy_siginfo_to_user32(struct compat_siginfo __user *to, |
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const kernel_siginfo_t *from); |
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#define copy_siginfo_to_user32 copy_siginfo_to_user32 |
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#endif /* CONFIG_X86_X32_ABI */ |
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#endif /* _ASM_X86_COMPAT_H */
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