1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_S390X_COMPAT_H 3 #define _ASM_S390X_COMPAT_H 4 /* 5 * Architecture specific compatibility types 6 */ 7 #include <linux/types.h> 8 #include <linux/sched.h> 9 #include <linux/sched/task_stack.h> 10 #include <linux/thread_info.h> 11 #include <asm/ptrace.h> 12 13 #define compat_mode_t compat_mode_t 14 typedef u16 compat_mode_t; 15 16 #define __compat_uid_t __compat_uid_t 17 typedef u16 __compat_uid_t; 18 typedef u16 __compat_gid_t; 19 20 #define compat_dev_t compat_dev_t 21 typedef u16 compat_dev_t; 22 23 #define compat_ipc_pid_t compat_ipc_pid_t 24 typedef u16 compat_ipc_pid_t; 25 26 #define compat_statfs compat_statfs 27 28 #include <asm-generic/compat.h> 29 30 #define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p( \ 31 typeof(0?(__force t)0:0ULL), u64)) 32 33 #define __SC_DELOUSE(t,v) ({ \ 34 BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \ 35 (__force t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \ 36 }) 37 38 #define PSW32_MASK_USER 0x0000FF00UL 39 40 #define PSW32_USER_BITS (PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | \ 41 PSW32_DEFAULT_KEY | PSW32_MASK_BASE | \ 42 PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \ 43 PSW32_ASC_PRIMARY) 44 45 #define COMPAT_UTS_MACHINE "s390\0\0\0\0" 46 47 typedef u16 compat_nlink_t; 48 49 typedef struct { 50 u32 mask; 51 u32 addr; 52 } __aligned(8) psw_compat_t; 53 54 typedef struct { 55 psw_compat_t psw; 56 u32 gprs[NUM_GPRS]; 57 u32 acrs[NUM_ACRS]; 58 u32 orig_gpr2; 59 } s390_compat_regs; 60 61 typedef struct { 62 u32 gprs_high[NUM_GPRS]; 63 } s390_compat_regs_high; 64 65 struct compat_stat { 66 compat_dev_t st_dev; 67 u16 __pad1; 68 compat_ino_t st_ino; 69 compat_mode_t st_mode; 70 compat_nlink_t st_nlink; 71 __compat_uid_t st_uid; 72 __compat_gid_t st_gid; 73 compat_dev_t st_rdev; 74 u16 __pad2; 75 u32 st_size; 76 u32 st_blksize; 77 u32 st_blocks; 78 u32 st_atime; 79 u32 st_atime_nsec; 80 u32 st_mtime; 81 u32 st_mtime_nsec; 82 u32 st_ctime; 83 u32 st_ctime_nsec; 84 u32 __unused4; 85 u32 __unused5; 86 }; 87 88 struct compat_statfs { 89 u32 f_type; 90 u32 f_bsize; 91 u32 f_blocks; 92 u32 f_bfree; 93 u32 f_bavail; 94 u32 f_files; 95 u32 f_ffree; 96 compat_fsid_t f_fsid; 97 u32 f_namelen; 98 u32 f_frsize; 99 u32 f_flags; 100 u32 f_spare[4]; 101 }; 102 103 struct compat_statfs64 { 104 u32 f_type; 105 u32 f_bsize; 106 u64 f_blocks; 107 u64 f_bfree; 108 u64 f_bavail; 109 u64 f_files; 110 u64 f_ffree; 111 compat_fsid_t f_fsid; 112 u32 f_namelen; 113 u32 f_frsize; 114 u32 f_flags; 115 u32 f_spare[5]; 116 }; 117 118 /* 119 * A pointer passed in from user mode. This should not 120 * be used for syscall parameters, just declare them 121 * as pointers because the syscall entry code will have 122 * appropriately converted them already. 123 */ 124 125 static inline void __user *compat_ptr(compat_uptr_t uptr) 126 { 127 return (void __user *)(unsigned long)(uptr & 0x7fffffffUL); 128 } 129 #define compat_ptr(uptr) compat_ptr(uptr) 130 131 #ifdef CONFIG_COMPAT 132 133 static inline int is_compat_task(void) 134 { 135 return test_thread_flag(TIF_31BIT); 136 } 137 138 #endif 139 140 #endif /* _ASM_S390X_COMPAT_H */ 141