include/asm/compat.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _ASM_X86_COMPAT_H
0003 #define _ASM_X86_COMPAT_H
0004
0005 /*
0006  * Architecture specific compatibility types
0007  */
0008 #include <linux/types.h>
0009 #include <linux/sched.h>
0010 #include <linux/sched/task_stack.h>
0011 #include <asm/processor.h>
0012 #include <asm/user32.h>
0013 #include <asm/unistd.h>
0014
0015 #define compat_mode_t   compat_mode_t
0016 typedef u16     compat_mode_t;
0017
0018 #define __compat_uid_t  __compat_uid_t
0019 typedef u16     __compat_uid_t;
0020 typedef u16     __compat_gid_t;
0021
0022 #define compat_dev_t    compat_dev_t
0023 typedef u16     compat_dev_t;
0024
0025 #define compat_ipc_pid_t compat_ipc_pid_t
0026 typedef u16      compat_ipc_pid_t;
0027
0028 #define compat_statfs   compat_statfs
0029
0030 #include <asm-generic/compat.h>
0031
0032 #define COMPAT_UTS_MACHINE  "i686\0\0"
0033
0034 typedef u16     compat_nlink_t;
0035
0036 struct compat_stat {
0037     u32     st_dev;
0038     compat_ino_t    st_ino;
0039     compat_mode_t   st_mode;
0040     compat_nlink_t  st_nlink;
0041     __compat_uid_t  st_uid;
0042     __compat_gid_t  st_gid;
0043     u32     st_rdev;
0044     u32     st_size;
0045     u32     st_blksize;
0046     u32     st_blocks;
0047     u32     st_atime;
0048     u32     st_atime_nsec;
0049     u32     st_mtime;
0050     u32     st_mtime_nsec;
0051     u32     st_ctime;
0052     u32     st_ctime_nsec;
0053     u32     __unused4;
0054     u32     __unused5;
0055 };
0056
0057 /*
0058  * IA32 uses 4 byte alignment for 64 bit quantities, so we need to pack the
0059  * compat flock64 structure.
0060  */
0061 #define __ARCH_NEED_COMPAT_FLOCK64_PACKED
0062
0063 struct compat_statfs {
0064     int     f_type;
0065     int     f_bsize;
0066     int     f_blocks;
0067     int     f_bfree;
0068     int     f_bavail;
0069     int     f_files;
0070     int     f_ffree;
0071     compat_fsid_t   f_fsid;
0072     int     f_namelen;  /* SunOS ignores this field. */
0073     int     f_frsize;
0074     int     f_flags;
0075     int     f_spare[4];
0076 };
0077
0078 #ifdef CONFIG_X86_X32_ABI
0079 #define COMPAT_USE_64BIT_TIME \
0080     (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
0081 #endif
0082
0083 static inline bool in_x32_syscall(void)
0084 {
0085 #ifdef CONFIG_X86_X32_ABI
0086     if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
0087         return true;
0088 #endif
0089     return false;
0090 }
0091
0092 static inline bool in_32bit_syscall(void)
0093 {
0094     return in_ia32_syscall() || in_x32_syscall();
0095 }
0096
0097 #ifdef CONFIG_COMPAT
0098 static inline bool in_compat_syscall(void)
0099 {
0100     return in_32bit_syscall();
0101 }
0102 #define in_compat_syscall in_compat_syscall /* override the generic impl */
0103 #define compat_need_64bit_alignment_fixup in_ia32_syscall
0104 #endif
0105
0106 struct compat_siginfo;
0107
0108 #ifdef CONFIG_X86_X32_ABI
0109 int copy_siginfo_to_user32(struct compat_siginfo __user *to,
0110         const kernel_siginfo_t *from);
0111 #define copy_siginfo_to_user32 copy_siginfo_to_user32
0112 #endif /* CONFIG_X86_X32_ABI */
0113
0114 #endif /* _ASM_X86_COMPAT_H */