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_USER_HZ 100 16#define COMPAT_UTS_MACHINE "i686\0\0" 17 18typedef u32 compat_size_t; 19typedef s32 compat_ssize_t; 20typedef s32 compat_time_t; 21typedef s32 compat_clock_t; 22typedef s32 compat_pid_t; 23typedef u16 __compat_uid_t; 24typedef u16 __compat_gid_t; 25typedef u32 __compat_uid32_t; 26typedef u32 __compat_gid32_t; 27typedef u16 compat_mode_t; 28typedef u32 compat_ino_t; 29typedef u16 compat_dev_t; 30typedef s32 compat_off_t; 31typedef s64 compat_loff_t; 32typedef u16 compat_nlink_t; 33typedef u16 compat_ipc_pid_t; 34typedef s32 compat_daddr_t; 35typedef u32 compat_caddr_t; 36typedef __kernel_fsid_t compat_fsid_t; 37typedef s32 compat_timer_t; 38typedef s32 compat_key_t; 39 40typedef s32 compat_int_t; 41typedef s32 compat_long_t; 42typedef s64 __attribute__((aligned(4))) compat_s64; 43typedef u32 compat_uint_t; 44typedef u32 compat_ulong_t; 45typedef u32 compat_u32; 46typedef u64 __attribute__((aligned(4))) compat_u64; 47typedef u32 compat_uptr_t; 48 49struct compat_timespec { 50 compat_time_t tv_sec; 51 s32 tv_nsec; 52}; 53 54struct compat_timeval { 55 compat_time_t tv_sec; 56 s32 tv_usec; 57}; 58 59struct compat_stat { 60 compat_dev_t st_dev; 61 u16 __pad1; 62 compat_ino_t st_ino; 63 compat_mode_t st_mode; 64 compat_nlink_t st_nlink; 65 __compat_uid_t st_uid; 66 __compat_gid_t st_gid; 67 compat_dev_t st_rdev; 68 u16 __pad2; 69 u32 st_size; 70 u32 st_blksize; 71 u32 st_blocks; 72 u32 st_atime; 73 u32 st_atime_nsec; 74 u32 st_mtime; 75 u32 st_mtime_nsec; 76 u32 st_ctime; 77 u32 st_ctime_nsec; 78 u32 __unused4; 79 u32 __unused5; 80}; 81 82struct compat_flock { 83 short l_type; 84 short l_whence; 85 compat_off_t l_start; 86 compat_off_t l_len; 87 compat_pid_t l_pid; 88}; 89 90#define F_GETLK64 12 /* using 'struct flock64' */ 91#define F_SETLK64 13 92#define F_SETLKW64 14 93 94/* 95 * IA32 uses 4 byte alignment for 64 bit quantities, 96 * so we need to pack this structure. 97 */ 98struct compat_flock64 { 99 short l_type; 100 short l_whence; 101 compat_loff_t l_start; 102 compat_loff_t l_len; 103 compat_pid_t l_pid; 104} __attribute__((packed)); 105 106struct compat_statfs { 107 int f_type; 108 int f_bsize; 109 int f_blocks; 110 int f_bfree; 111 int f_bavail; 112 int f_files; 113 int f_ffree; 114 compat_fsid_t f_fsid; 115 int f_namelen; /* SunOS ignores this field. */ 116 int f_frsize; 117 int f_flags; 118 int f_spare[4]; 119}; 120 121#define COMPAT_RLIM_INFINITY 0xffffffff 122 123typedef u32 compat_old_sigset_t; /* at least 32 bits */ 124 125#define _COMPAT_NSIG 64 126#define _COMPAT_NSIG_BPW 32 127 128typedef u32 compat_sigset_word; 129 130#define COMPAT_OFF_T_MAX 0x7fffffff 131 132struct compat_ipc64_perm { 133 compat_key_t key; 134 __compat_uid32_t uid; 135 __compat_gid32_t gid; 136 __compat_uid32_t cuid; 137 __compat_gid32_t cgid; 138 unsigned short mode; 139 unsigned short __pad1; 140 unsigned short seq; 141 unsigned short __pad2; 142 compat_ulong_t unused1; 143 compat_ulong_t unused2; 144}; 145 146struct compat_semid64_ds { 147 struct compat_ipc64_perm sem_perm; 148 compat_time_t sem_otime; 149 compat_ulong_t __unused1; 150 compat_time_t sem_ctime; 151 compat_ulong_t __unused2; 152 compat_ulong_t sem_nsems; 153 compat_ulong_t __unused3; 154 compat_ulong_t __unused4; 155}; 156 157struct compat_msqid64_ds { 158 struct compat_ipc64_perm msg_perm; 159 compat_time_t msg_stime; 160 compat_ulong_t __unused1; 161 compat_time_t msg_rtime; 162 compat_ulong_t __unused2; 163 compat_time_t msg_ctime; 164 compat_ulong_t __unused3; 165 compat_ulong_t msg_cbytes; 166 compat_ulong_t msg_qnum; 167 compat_ulong_t msg_qbytes; 168 compat_pid_t msg_lspid; 169 compat_pid_t msg_lrpid; 170 compat_ulong_t __unused4; 171 compat_ulong_t __unused5; 172}; 173 174struct compat_shmid64_ds { 175 struct compat_ipc64_perm shm_perm; 176 compat_size_t shm_segsz; 177 compat_time_t shm_atime; 178 compat_ulong_t __unused1; 179 compat_time_t shm_dtime; 180 compat_ulong_t __unused2; 181 compat_time_t shm_ctime; 182 compat_ulong_t __unused3; 183 compat_pid_t shm_cpid; 184 compat_pid_t shm_lpid; 185 compat_ulong_t shm_nattch; 186 compat_ulong_t __unused4; 187 compat_ulong_t __unused5; 188}; 189 190/* 191 * The type of struct elf_prstatus.pr_reg in compatible core dumps. 192 */ 193typedef struct user_regs_struct compat_elf_gregset_t; 194 195/* Full regset -- prstatus on x32, otherwise on ia32 */ 196#define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296) 197#define SET_PR_FPVALID(S, V, R) \ 198 do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \ 199 while (0) 200 201#ifdef CONFIG_X86_X32_ABI 202#define COMPAT_USE_64BIT_TIME \ 203 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 204#endif 205 206/* 207 * A pointer passed in from user mode. This should not 208 * be used for syscall parameters, just declare them 209 * as pointers because the syscall entry code will have 210 * appropriately converted them already. 211 */ 212 213static inline void __user *compat_ptr(compat_uptr_t uptr) 214{ 215 return (void __user *)(unsigned long)uptr; 216} 217 218static inline compat_uptr_t ptr_to_compat(void __user *uptr) 219{ 220 return (u32)(unsigned long)uptr; 221} 222 223static inline void __user *arch_compat_alloc_user_space(long len) 224{ 225 compat_uptr_t sp; 226 227 if (test_thread_flag(TIF_IA32)) { 228 sp = task_pt_regs(current)->sp; 229 } else { 230 /* -128 for the x32 ABI redzone */ 231 sp = task_pt_regs(current)->sp - 128; 232 } 233 234 return (void __user *)round_down(sp - len, 16); 235} 236 237static inline bool in_x32_syscall(void) 238{ 239#ifdef CONFIG_X86_X32_ABI 240 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 241 return true; 242#endif 243 return false; 244} 245 246static inline bool in_compat_syscall(void) 247{ 248 return in_ia32_syscall() || in_x32_syscall(); 249} 250#define in_compat_syscall in_compat_syscall /* override the generic impl */ 251 252struct compat_siginfo; 253int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 254 const siginfo_t *from, bool x32_ABI); 255 256#endif /* _ASM_X86_COMPAT_H */ 257