1#ifndef _ASM_X86_COMPAT_H 2#define _ASM_X86_COMPAT_H 3 4/* 5 * Architecture specific compatibility types 6 */ 7#include <linux/types.h> 8#include <linux/sched.h> 9#include <asm/processor.h> 10#include <asm/user32.h> 11#include <asm/unistd.h> 12 13#define COMPAT_USER_HZ 100 14#define COMPAT_UTS_MACHINE "i686\0\0" 15 16typedef u32 compat_size_t; 17typedef s32 compat_ssize_t; 18typedef s32 compat_time_t; 19typedef s32 compat_clock_t; 20typedef s32 compat_pid_t; 21typedef u16 __compat_uid_t; 22typedef u16 __compat_gid_t; 23typedef u32 __compat_uid32_t; 24typedef u32 __compat_gid32_t; 25typedef u16 compat_mode_t; 26typedef u32 compat_ino_t; 27typedef u16 compat_dev_t; 28typedef s32 compat_off_t; 29typedef s64 compat_loff_t; 30typedef u16 compat_nlink_t; 31typedef u16 compat_ipc_pid_t; 32typedef s32 compat_daddr_t; 33typedef u32 compat_caddr_t; 34typedef __kernel_fsid_t compat_fsid_t; 35typedef s32 compat_timer_t; 36typedef s32 compat_key_t; 37 38typedef s32 compat_int_t; 39typedef s32 compat_long_t; 40typedef s64 __attribute__((aligned(4))) compat_s64; 41typedef u32 compat_uint_t; 42typedef u32 compat_ulong_t; 43typedef u32 compat_u32; 44typedef u64 __attribute__((aligned(4))) compat_u64; 45typedef u32 compat_uptr_t; 46 47struct compat_timespec { 48 compat_time_t tv_sec; 49 s32 tv_nsec; 50}; 51 52struct compat_timeval { 53 compat_time_t tv_sec; 54 s32 tv_usec; 55}; 56 57struct compat_stat { 58 compat_dev_t st_dev; 59 u16 __pad1; 60 compat_ino_t st_ino; 61 compat_mode_t st_mode; 62 compat_nlink_t st_nlink; 63 __compat_uid_t st_uid; 64 __compat_gid_t st_gid; 65 compat_dev_t st_rdev; 66 u16 __pad2; 67 u32 st_size; 68 u32 st_blksize; 69 u32 st_blocks; 70 u32 st_atime; 71 u32 st_atime_nsec; 72 u32 st_mtime; 73 u32 st_mtime_nsec; 74 u32 st_ctime; 75 u32 st_ctime_nsec; 76 u32 __unused4; 77 u32 __unused5; 78}; 79 80struct compat_flock { 81 short l_type; 82 short l_whence; 83 compat_off_t l_start; 84 compat_off_t l_len; 85 compat_pid_t l_pid; 86}; 87 88#define F_GETLK64 12 /* using 'struct flock64' */ 89#define F_SETLK64 13 90#define F_SETLKW64 14 91 92/* 93 * IA32 uses 4 byte alignment for 64 bit quantities, 94 * so we need to pack this structure. 95 */ 96struct compat_flock64 { 97 short l_type; 98 short l_whence; 99 compat_loff_t l_start; 100 compat_loff_t l_len; 101 compat_pid_t l_pid; 102} __attribute__((packed)); 103 104struct compat_statfs { 105 int f_type; 106 int f_bsize; 107 int f_blocks; 108 int f_bfree; 109 int f_bavail; 110 int f_files; 111 int f_ffree; 112 compat_fsid_t f_fsid; 113 int f_namelen; /* SunOS ignores this field. */ 114 int f_frsize; 115 int f_flags; 116 int f_spare[4]; 117}; 118 119#define COMPAT_RLIM_OLD_INFINITY 0x7fffffff 120#define COMPAT_RLIM_INFINITY 0xffffffff 121 122typedef u32 compat_old_sigset_t; /* at least 32 bits */ 123 124#define _COMPAT_NSIG 64 125#define _COMPAT_NSIG_BPW 32 126 127typedef u32 compat_sigset_word; 128 129typedef union compat_sigval { 130 compat_int_t sival_int; 131 compat_uptr_t sival_ptr; 132} compat_sigval_t; 133 134typedef struct compat_siginfo { 135 int si_signo; 136 int si_errno; 137 int si_code; 138 139 union { 140 int _pad[128/sizeof(int) - 3]; 141 142 /* kill() */ 143 struct { 144 unsigned int _pid; /* sender's pid */ 145 unsigned int _uid; /* sender's uid */ 146 } _kill; 147 148 /* POSIX.1b timers */ 149 struct { 150 compat_timer_t _tid; /* timer id */ 151 int _overrun; /* overrun count */ 152 compat_sigval_t _sigval; /* same as below */ 153 int _sys_private; /* not to be passed to user */ 154 int _overrun_incr; /* amount to add to overrun */ 155 } _timer; 156 157 /* POSIX.1b signals */ 158 struct { 159 unsigned int _pid; /* sender's pid */ 160 unsigned int _uid; /* sender's uid */ 161 compat_sigval_t _sigval; 162 } _rt; 163 164 /* SIGCHLD */ 165 struct { 166 unsigned int _pid; /* which child */ 167 unsigned int _uid; /* sender's uid */ 168 int _status; /* exit code */ 169 compat_clock_t _utime; 170 compat_clock_t _stime; 171 } _sigchld; 172 173 /* SIGCHLD (x32 version) */ 174 struct { 175 unsigned int _pid; /* which child */ 176 unsigned int _uid; /* sender's uid */ 177 int _status; /* exit code */ 178 compat_s64 _utime; 179 compat_s64 _stime; 180 } _sigchld_x32; 181 182 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 183 struct { 184 unsigned int _addr; /* faulting insn/memory ref. */ 185 short int _addr_lsb; /* Valid LSB of the reported address. */ 186 union { 187 /* used when si_code=SEGV_BNDERR */ 188 struct { 189 compat_uptr_t _lower; 190 compat_uptr_t _upper; 191 } _addr_bnd; 192 /* used when si_code=SEGV_PKUERR */ 193 compat_u32 _pkey; 194 }; 195 } _sigfault; 196 197 /* SIGPOLL */ 198 struct { 199 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 200 int _fd; 201 } _sigpoll; 202 203 struct { 204 unsigned int _call_addr; /* calling insn */ 205 int _syscall; /* triggering system call number */ 206 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 207 } _sigsys; 208 } _sifields; 209} compat_siginfo_t; 210 211#define COMPAT_OFF_T_MAX 0x7fffffff 212#define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL 213 214struct compat_ipc64_perm { 215 compat_key_t key; 216 __compat_uid32_t uid; 217 __compat_gid32_t gid; 218 __compat_uid32_t cuid; 219 __compat_gid32_t cgid; 220 unsigned short mode; 221 unsigned short __pad1; 222 unsigned short seq; 223 unsigned short __pad2; 224 compat_ulong_t unused1; 225 compat_ulong_t unused2; 226}; 227 228struct compat_semid64_ds { 229 struct compat_ipc64_perm sem_perm; 230 compat_time_t sem_otime; 231 compat_ulong_t __unused1; 232 compat_time_t sem_ctime; 233 compat_ulong_t __unused2; 234 compat_ulong_t sem_nsems; 235 compat_ulong_t __unused3; 236 compat_ulong_t __unused4; 237}; 238 239struct compat_msqid64_ds { 240 struct compat_ipc64_perm msg_perm; 241 compat_time_t msg_stime; 242 compat_ulong_t __unused1; 243 compat_time_t msg_rtime; 244 compat_ulong_t __unused2; 245 compat_time_t msg_ctime; 246 compat_ulong_t __unused3; 247 compat_ulong_t msg_cbytes; 248 compat_ulong_t msg_qnum; 249 compat_ulong_t msg_qbytes; 250 compat_pid_t msg_lspid; 251 compat_pid_t msg_lrpid; 252 compat_ulong_t __unused4; 253 compat_ulong_t __unused5; 254}; 255 256struct compat_shmid64_ds { 257 struct compat_ipc64_perm shm_perm; 258 compat_size_t shm_segsz; 259 compat_time_t shm_atime; 260 compat_ulong_t __unused1; 261 compat_time_t shm_dtime; 262 compat_ulong_t __unused2; 263 compat_time_t shm_ctime; 264 compat_ulong_t __unused3; 265 compat_pid_t shm_cpid; 266 compat_pid_t shm_lpid; 267 compat_ulong_t shm_nattch; 268 compat_ulong_t __unused4; 269 compat_ulong_t __unused5; 270}; 271 272/* 273 * The type of struct elf_prstatus.pr_reg in compatible core dumps. 274 */ 275#ifdef CONFIG_X86_X32_ABI 276typedef struct user_regs_struct compat_elf_gregset_t; 277 278#define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216) 279#define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296) 280#define SET_PR_FPVALID(S,V) \ 281 do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \ 282 while (0) 283 284#define COMPAT_USE_64BIT_TIME \ 285 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 286#else 287typedef struct user_regs_struct32 compat_elf_gregset_t; 288#endif 289 290/* 291 * A pointer passed in from user mode. This should not 292 * be used for syscall parameters, just declare them 293 * as pointers because the syscall entry code will have 294 * appropriately converted them already. 295 */ 296 297static inline void __user *compat_ptr(compat_uptr_t uptr) 298{ 299 return (void __user *)(unsigned long)uptr; 300} 301 302static inline compat_uptr_t ptr_to_compat(void __user *uptr) 303{ 304 return (u32)(unsigned long)uptr; 305} 306 307static inline void __user *arch_compat_alloc_user_space(long len) 308{ 309 compat_uptr_t sp; 310 311 if (test_thread_flag(TIF_IA32)) { 312 sp = task_pt_regs(current)->sp; 313 } else { 314 /* -128 for the x32 ABI redzone */ 315 sp = this_cpu_read(old_rsp) - 128; 316 } 317 318 return (void __user *)round_down(sp - len, 16); 319} 320 321static inline bool is_x32_task(void) 322{ 323#ifdef CONFIG_X86_X32_ABI 324 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 325 return true; 326#endif 327 return false; 328} 329 330static inline bool is_compat_task(void) 331{ 332 return is_ia32_task() || is_x32_task(); 333} 334 335#endif /* _ASM_X86_COMPAT_H */ 336