| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef _ASM_X86_COMPAT_H |
| 3 | #define _ASM_X86_COMPAT_H |
| 4 | |
| 5 | /* |
| 6 | * Architecture specific compatibility types |
| 7 | */ |
| 8 | #include <linux/types.h> |
| 9 | #include <linux/sched.h> |
| 10 | #include <linux/sched/task_stack.h> |
| 11 | #include <asm/processor.h> |
| 12 | #include <asm/user32.h> |
| 13 | #include <asm/unistd.h> |
| 14 | |
| 15 | #define compat_mode_t compat_mode_t |
| 16 | typedef u16 compat_mode_t; |
| 17 | |
| 18 | #define __compat_uid_t __compat_uid_t |
| 19 | typedef u16 __compat_uid_t; |
| 20 | typedef u16 __compat_gid_t; |
| 21 | |
| 22 | #define compat_dev_t compat_dev_t |
| 23 | typedef u16 compat_dev_t; |
| 24 | |
| 25 | #define compat_ipc_pid_t compat_ipc_pid_t |
| 26 | typedef u16 compat_ipc_pid_t; |
| 27 | |
| 28 | #define compat_statfs compat_statfs |
| 29 | |
| 30 | #include <asm-generic/compat.h> |
| 31 | |
| 32 | #define COMPAT_UTS_MACHINE "i686\0\0" |
| 33 | |
| 34 | typedef u16 compat_nlink_t; |
| 35 | |
| 36 | struct compat_stat { |
| 37 | u32 st_dev; |
| 38 | compat_ino_t st_ino; |
| 39 | compat_mode_t st_mode; |
| 40 | compat_nlink_t st_nlink; |
| 41 | __compat_uid_t st_uid; |
| 42 | __compat_gid_t st_gid; |
| 43 | u32 st_rdev; |
| 44 | u32 st_size; |
| 45 | u32 st_blksize; |
| 46 | u32 st_blocks; |
| 47 | u32 st_atime; |
| 48 | u32 st_atime_nsec; |
| 49 | u32 st_mtime; |
| 50 | u32 st_mtime_nsec; |
| 51 | u32 st_ctime; |
| 52 | u32 st_ctime_nsec; |
| 53 | u32 __unused4; |
| 54 | u32 __unused5; |
| 55 | }; |
| 56 | |
| 57 | /* |
| 58 | * IA32 uses 4 byte alignment for 64 bit quantities, so we need to pack the |
| 59 | * compat flock64 structure. |
| 60 | */ |
| 61 | #define __ARCH_NEED_COMPAT_FLOCK64_PACKED |
| 62 | |
| 63 | struct compat_statfs { |
| 64 | int f_type; |
| 65 | int f_bsize; |
| 66 | int f_blocks; |
| 67 | int f_bfree; |
| 68 | int f_bavail; |
| 69 | int f_files; |
| 70 | int f_ffree; |
| 71 | compat_fsid_t f_fsid; |
| 72 | int f_namelen; /* SunOS ignores this field. */ |
| 73 | int f_frsize; |
| 74 | int f_flags; |
| 75 | int f_spare[4]; |
| 76 | }; |
| 77 | |
| 78 | #ifdef CONFIG_X86_X32_ABI |
| 79 | #define COMPAT_USE_64BIT_TIME \ |
| 80 | (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) |
| 81 | #endif |
| 82 | |
| 83 | static inline bool in_x32_syscall(void) |
| 84 | { |
| 85 | #ifdef CONFIG_X86_X32_ABI |
| 86 | if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) |
| 87 | return true; |
| 88 | #endif |
| 89 | return false; |
| 90 | } |
| 91 | |
| 92 | static inline bool in_32bit_syscall(void) |
| 93 | { |
| 94 | return in_ia32_syscall() || in_x32_syscall(); |
| 95 | } |
| 96 | |
| 97 | #ifdef CONFIG_COMPAT |
| 98 | static inline bool in_compat_syscall(void) |
| 99 | { |
| 100 | return in_32bit_syscall(); |
| 101 | } |
| 102 | #define in_compat_syscall in_compat_syscall /* override the generic impl */ |
| 103 | #define compat_need_64bit_alignment_fixup in_ia32_syscall |
| 104 | #endif |
| 105 | |
| 106 | struct compat_siginfo; |
| 107 | |
| 108 | #ifdef CONFIG_X86_X32_ABI |
| 109 | int copy_siginfo_to_user32(struct compat_siginfo __user *to, |
| 110 | const kernel_siginfo_t *from); |
| 111 | #define copy_siginfo_to_user32 copy_siginfo_to_user32 |
| 112 | #endif /* CONFIG_X86_X32_ABI */ |
| 113 | |
| 114 | #endif /* _ASM_X86_COMPAT_H */ |
| 115 |