11965aae3SH. Peter Anvin #ifndef _ASM_X86_COMPAT_H 21965aae3SH. Peter Anvin #define _ASM_X86_COMPAT_H 3bb898558SAl Viro 4bb898558SAl Viro /* 5bb898558SAl Viro * Architecture specific compatibility types 6bb898558SAl Viro */ 7bb898558SAl Viro #include <linux/types.h> 8bb898558SAl Viro #include <linux/sched.h> 9d1a797f3SH. Peter Anvin #include <asm/processor.h> 10bb898558SAl Viro #include <asm/user32.h> 11fca460f9SH. Peter Anvin #include <asm/unistd.h> 12bb898558SAl Viro 13bb898558SAl Viro #define COMPAT_USER_HZ 100 14e28cbf22SChristoph Hellwig #define COMPAT_UTS_MACHINE "i686\0\0" 15bb898558SAl Viro 16bb898558SAl Viro typedef u32 compat_size_t; 17bb898558SAl Viro typedef s32 compat_ssize_t; 18bb898558SAl Viro typedef s32 compat_time_t; 19bb898558SAl Viro typedef s32 compat_clock_t; 20bb898558SAl Viro typedef s32 compat_pid_t; 21bb898558SAl Viro typedef u16 __compat_uid_t; 22bb898558SAl Viro typedef u16 __compat_gid_t; 23bb898558SAl Viro typedef u32 __compat_uid32_t; 24bb898558SAl Viro typedef u32 __compat_gid32_t; 25bb898558SAl Viro typedef u16 compat_mode_t; 26bb898558SAl Viro typedef u32 compat_ino_t; 27bb898558SAl Viro typedef u16 compat_dev_t; 28bb898558SAl Viro typedef s32 compat_off_t; 29bb898558SAl Viro typedef s64 compat_loff_t; 30bb898558SAl Viro typedef u16 compat_nlink_t; 31bb898558SAl Viro typedef u16 compat_ipc_pid_t; 32bb898558SAl Viro typedef s32 compat_daddr_t; 33bb898558SAl Viro typedef u32 compat_caddr_t; 34bb898558SAl Viro typedef __kernel_fsid_t compat_fsid_t; 35bb898558SAl Viro typedef s32 compat_timer_t; 36bb898558SAl Viro typedef s32 compat_key_t; 37bb898558SAl Viro 38bb898558SAl Viro typedef s32 compat_int_t; 39bb898558SAl Viro typedef s32 compat_long_t; 40bb898558SAl Viro typedef s64 __attribute__((aligned(4))) compat_s64; 41bb898558SAl Viro typedef u32 compat_uint_t; 42bb898558SAl Viro typedef u32 compat_ulong_t; 43bb898558SAl Viro typedef u64 __attribute__((aligned(4))) compat_u64; 44751f409dSDenys Vlasenko typedef u32 compat_uptr_t; 45bb898558SAl Viro 46bb898558SAl Viro struct compat_timespec { 47bb898558SAl Viro compat_time_t tv_sec; 48bb898558SAl Viro s32 tv_nsec; 49bb898558SAl Viro }; 50bb898558SAl Viro 51bb898558SAl Viro struct compat_timeval { 52bb898558SAl Viro compat_time_t tv_sec; 53bb898558SAl Viro s32 tv_usec; 54bb898558SAl Viro }; 55bb898558SAl Viro 56bb898558SAl Viro struct compat_stat { 57bb898558SAl Viro compat_dev_t st_dev; 58bb898558SAl Viro u16 __pad1; 59bb898558SAl Viro compat_ino_t st_ino; 60bb898558SAl Viro compat_mode_t st_mode; 61bb898558SAl Viro compat_nlink_t st_nlink; 62bb898558SAl Viro __compat_uid_t st_uid; 63bb898558SAl Viro __compat_gid_t st_gid; 64bb898558SAl Viro compat_dev_t st_rdev; 65bb898558SAl Viro u16 __pad2; 66bb898558SAl Viro u32 st_size; 67bb898558SAl Viro u32 st_blksize; 68bb898558SAl Viro u32 st_blocks; 69bb898558SAl Viro u32 st_atime; 70bb898558SAl Viro u32 st_atime_nsec; 71bb898558SAl Viro u32 st_mtime; 72bb898558SAl Viro u32 st_mtime_nsec; 73bb898558SAl Viro u32 st_ctime; 74bb898558SAl Viro u32 st_ctime_nsec; 75bb898558SAl Viro u32 __unused4; 76bb898558SAl Viro u32 __unused5; 77bb898558SAl Viro }; 78bb898558SAl Viro 79bb898558SAl Viro struct compat_flock { 80bb898558SAl Viro short l_type; 81bb898558SAl Viro short l_whence; 82bb898558SAl Viro compat_off_t l_start; 83bb898558SAl Viro compat_off_t l_len; 84bb898558SAl Viro compat_pid_t l_pid; 85bb898558SAl Viro }; 86bb898558SAl Viro 87bb898558SAl Viro #define F_GETLK64 12 /* using 'struct flock64' */ 88bb898558SAl Viro #define F_SETLK64 13 89bb898558SAl Viro #define F_SETLKW64 14 90bb898558SAl Viro 91bb898558SAl Viro /* 92bb898558SAl Viro * IA32 uses 4 byte alignment for 64 bit quantities, 93bb898558SAl Viro * so we need to pack this structure. 94bb898558SAl Viro */ 95bb898558SAl Viro struct compat_flock64 { 96bb898558SAl Viro short l_type; 97bb898558SAl Viro short l_whence; 98bb898558SAl Viro compat_loff_t l_start; 99bb898558SAl Viro compat_loff_t l_len; 100bb898558SAl Viro compat_pid_t l_pid; 101bb898558SAl Viro } __attribute__((packed)); 102bb898558SAl Viro 103bb898558SAl Viro struct compat_statfs { 104bb898558SAl Viro int f_type; 105bb898558SAl Viro int f_bsize; 106bb898558SAl Viro int f_blocks; 107bb898558SAl Viro int f_bfree; 108bb898558SAl Viro int f_bavail; 109bb898558SAl Viro int f_files; 110bb898558SAl Viro int f_ffree; 111bb898558SAl Viro compat_fsid_t f_fsid; 112bb898558SAl Viro int f_namelen; /* SunOS ignores this field. */ 113bb898558SAl Viro int f_frsize; 1141448c721SEric W. Biederman int f_flags; 1151448c721SEric W. Biederman int f_spare[4]; 116bb898558SAl Viro }; 117bb898558SAl Viro 118bb898558SAl Viro #define COMPAT_RLIM_OLD_INFINITY 0x7fffffff 119bb898558SAl Viro #define COMPAT_RLIM_INFINITY 0xffffffff 120bb898558SAl Viro 121bb898558SAl Viro typedef u32 compat_old_sigset_t; /* at least 32 bits */ 122bb898558SAl Viro 123bb898558SAl Viro #define _COMPAT_NSIG 64 124bb898558SAl Viro #define _COMPAT_NSIG_BPW 32 125bb898558SAl Viro 126bb898558SAl Viro typedef u32 compat_sigset_word; 127bb898558SAl Viro 128751f409dSDenys Vlasenko typedef union compat_sigval { 129751f409dSDenys Vlasenko compat_int_t sival_int; 130751f409dSDenys Vlasenko compat_uptr_t sival_ptr; 131751f409dSDenys Vlasenko } compat_sigval_t; 132751f409dSDenys Vlasenko 133751f409dSDenys Vlasenko typedef struct compat_siginfo { 134751f409dSDenys Vlasenko int si_signo; 135751f409dSDenys Vlasenko int si_errno; 136751f409dSDenys Vlasenko int si_code; 137751f409dSDenys Vlasenko 138751f409dSDenys Vlasenko union { 139751f409dSDenys Vlasenko int _pad[128/sizeof(int) - 3]; 140751f409dSDenys Vlasenko 141751f409dSDenys Vlasenko /* kill() */ 142751f409dSDenys Vlasenko struct { 143751f409dSDenys Vlasenko unsigned int _pid; /* sender's pid */ 144751f409dSDenys Vlasenko unsigned int _uid; /* sender's uid */ 145751f409dSDenys Vlasenko } _kill; 146751f409dSDenys Vlasenko 147751f409dSDenys Vlasenko /* POSIX.1b timers */ 148751f409dSDenys Vlasenko struct { 149751f409dSDenys Vlasenko compat_timer_t _tid; /* timer id */ 150751f409dSDenys Vlasenko int _overrun; /* overrun count */ 151751f409dSDenys Vlasenko compat_sigval_t _sigval; /* same as below */ 152751f409dSDenys Vlasenko int _sys_private; /* not to be passed to user */ 153751f409dSDenys Vlasenko int _overrun_incr; /* amount to add to overrun */ 154751f409dSDenys Vlasenko } _timer; 155751f409dSDenys Vlasenko 156751f409dSDenys Vlasenko /* POSIX.1b signals */ 157751f409dSDenys Vlasenko struct { 158751f409dSDenys Vlasenko unsigned int _pid; /* sender's pid */ 159751f409dSDenys Vlasenko unsigned int _uid; /* sender's uid */ 160751f409dSDenys Vlasenko compat_sigval_t _sigval; 161751f409dSDenys Vlasenko } _rt; 162751f409dSDenys Vlasenko 163751f409dSDenys Vlasenko /* SIGCHLD */ 164751f409dSDenys Vlasenko struct { 165751f409dSDenys Vlasenko unsigned int _pid; /* which child */ 166751f409dSDenys Vlasenko unsigned int _uid; /* sender's uid */ 167751f409dSDenys Vlasenko int _status; /* exit code */ 168751f409dSDenys Vlasenko compat_clock_t _utime; 169751f409dSDenys Vlasenko compat_clock_t _stime; 170751f409dSDenys Vlasenko } _sigchld; 171751f409dSDenys Vlasenko 172751f409dSDenys Vlasenko /* SIGCHLD (x32 version) */ 173751f409dSDenys Vlasenko struct { 174751f409dSDenys Vlasenko unsigned int _pid; /* which child */ 175751f409dSDenys Vlasenko unsigned int _uid; /* sender's uid */ 176751f409dSDenys Vlasenko int _status; /* exit code */ 177751f409dSDenys Vlasenko compat_s64 _utime; 178751f409dSDenys Vlasenko compat_s64 _stime; 179751f409dSDenys Vlasenko } _sigchld_x32; 180751f409dSDenys Vlasenko 181751f409dSDenys Vlasenko /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 182751f409dSDenys Vlasenko struct { 183751f409dSDenys Vlasenko unsigned int _addr; /* faulting insn/memory ref. */ 184751f409dSDenys Vlasenko } _sigfault; 185751f409dSDenys Vlasenko 186751f409dSDenys Vlasenko /* SIGPOLL */ 187751f409dSDenys Vlasenko struct { 188751f409dSDenys Vlasenko int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 189751f409dSDenys Vlasenko int _fd; 190751f409dSDenys Vlasenko } _sigpoll; 191751f409dSDenys Vlasenko 192751f409dSDenys Vlasenko struct { 193751f409dSDenys Vlasenko unsigned int _call_addr; /* calling insn */ 194751f409dSDenys Vlasenko int _syscall; /* triggering system call number */ 195751f409dSDenys Vlasenko unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 196751f409dSDenys Vlasenko } _sigsys; 197751f409dSDenys Vlasenko } _sifields; 198751f409dSDenys Vlasenko } compat_siginfo_t; 199751f409dSDenys Vlasenko 200bb898558SAl Viro #define COMPAT_OFF_T_MAX 0x7fffffff 201bb898558SAl Viro #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL 202bb898558SAl Viro 203bb898558SAl Viro struct compat_ipc64_perm { 204bb898558SAl Viro compat_key_t key; 205bb898558SAl Viro __compat_uid32_t uid; 206bb898558SAl Viro __compat_gid32_t gid; 207bb898558SAl Viro __compat_uid32_t cuid; 208bb898558SAl Viro __compat_gid32_t cgid; 209bb898558SAl Viro unsigned short mode; 210bb898558SAl Viro unsigned short __pad1; 211bb898558SAl Viro unsigned short seq; 212bb898558SAl Viro unsigned short __pad2; 213bb898558SAl Viro compat_ulong_t unused1; 214bb898558SAl Viro compat_ulong_t unused2; 215bb898558SAl Viro }; 216bb898558SAl Viro 217bb898558SAl Viro struct compat_semid64_ds { 218bb898558SAl Viro struct compat_ipc64_perm sem_perm; 219bb898558SAl Viro compat_time_t sem_otime; 220bb898558SAl Viro compat_ulong_t __unused1; 221bb898558SAl Viro compat_time_t sem_ctime; 222bb898558SAl Viro compat_ulong_t __unused2; 223bb898558SAl Viro compat_ulong_t sem_nsems; 224bb898558SAl Viro compat_ulong_t __unused3; 225bb898558SAl Viro compat_ulong_t __unused4; 226bb898558SAl Viro }; 227bb898558SAl Viro 228bb898558SAl Viro struct compat_msqid64_ds { 229bb898558SAl Viro struct compat_ipc64_perm msg_perm; 230bb898558SAl Viro compat_time_t msg_stime; 231bb898558SAl Viro compat_ulong_t __unused1; 232bb898558SAl Viro compat_time_t msg_rtime; 233bb898558SAl Viro compat_ulong_t __unused2; 234bb898558SAl Viro compat_time_t msg_ctime; 235bb898558SAl Viro compat_ulong_t __unused3; 236bb898558SAl Viro compat_ulong_t msg_cbytes; 237bb898558SAl Viro compat_ulong_t msg_qnum; 238bb898558SAl Viro compat_ulong_t msg_qbytes; 239bb898558SAl Viro compat_pid_t msg_lspid; 240bb898558SAl Viro compat_pid_t msg_lrpid; 241bb898558SAl Viro compat_ulong_t __unused4; 242bb898558SAl Viro compat_ulong_t __unused5; 243bb898558SAl Viro }; 244bb898558SAl Viro 245bb898558SAl Viro struct compat_shmid64_ds { 246bb898558SAl Viro struct compat_ipc64_perm shm_perm; 247bb898558SAl Viro compat_size_t shm_segsz; 248bb898558SAl Viro compat_time_t shm_atime; 249bb898558SAl Viro compat_ulong_t __unused1; 250bb898558SAl Viro compat_time_t shm_dtime; 251bb898558SAl Viro compat_ulong_t __unused2; 252bb898558SAl Viro compat_time_t shm_ctime; 253bb898558SAl Viro compat_ulong_t __unused3; 254bb898558SAl Viro compat_pid_t shm_cpid; 255bb898558SAl Viro compat_pid_t shm_lpid; 256bb898558SAl Viro compat_ulong_t shm_nattch; 257bb898558SAl Viro compat_ulong_t __unused4; 258bb898558SAl Viro compat_ulong_t __unused5; 259bb898558SAl Viro }; 260bb898558SAl Viro 261bb898558SAl Viro /* 262bb898558SAl Viro * The type of struct elf_prstatus.pr_reg in compatible core dumps. 263bb898558SAl Viro */ 264d1a797f3SH. Peter Anvin #ifdef CONFIG_X86_X32_ABI 265d1a797f3SH. Peter Anvin typedef struct user_regs_struct compat_elf_gregset_t; 266d1a797f3SH. Peter Anvin 267d1a797f3SH. Peter Anvin #define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216) 268d1a797f3SH. Peter Anvin #define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296) 269d1a797f3SH. Peter Anvin #define SET_PR_FPVALID(S,V) \ 270d1a797f3SH. Peter Anvin do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \ 271d1a797f3SH. Peter Anvin while (0) 272d1a797f3SH. Peter Anvin 273d1a797f3SH. Peter Anvin #define COMPAT_USE_64BIT_TIME \ 274d1a797f3SH. Peter Anvin (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 275d1a797f3SH. Peter Anvin #else 276bb898558SAl Viro typedef struct user_regs_struct32 compat_elf_gregset_t; 277d1a797f3SH. Peter Anvin #endif 278bb898558SAl Viro 279bb898558SAl Viro /* 280bb898558SAl Viro * A pointer passed in from user mode. This should not 281bb898558SAl Viro * be used for syscall parameters, just declare them 282bb898558SAl Viro * as pointers because the syscall entry code will have 283bb898558SAl Viro * appropriately converted them already. 284bb898558SAl Viro */ 285bb898558SAl Viro 286bb898558SAl Viro static inline void __user *compat_ptr(compat_uptr_t uptr) 287bb898558SAl Viro { 288bb898558SAl Viro return (void __user *)(unsigned long)uptr; 289bb898558SAl Viro } 290bb898558SAl Viro 291bb898558SAl Viro static inline compat_uptr_t ptr_to_compat(void __user *uptr) 292bb898558SAl Viro { 293bb898558SAl Viro return (u32)(unsigned long)uptr; 294bb898558SAl Viro } 295bb898558SAl Viro 296c41d68a5SH. Peter Anvin static inline void __user *arch_compat_alloc_user_space(long len) 297bb898558SAl Viro { 298d1a797f3SH. Peter Anvin compat_uptr_t sp; 299d1a797f3SH. Peter Anvin 300d1a797f3SH. Peter Anvin if (test_thread_flag(TIF_IA32)) { 301d1a797f3SH. Peter Anvin sp = task_pt_regs(current)->sp; 302d1a797f3SH. Peter Anvin } else { 303d1a797f3SH. Peter Anvin /* -128 for the x32 ABI redzone */ 304263042e4SDenys Vlasenko sp = task_pt_regs(current)->sp - 128; 305d1a797f3SH. Peter Anvin } 306d1a797f3SH. Peter Anvin 307d1a797f3SH. Peter Anvin return (void __user *)round_down(sp - len, 16); 308bb898558SAl Viro } 309bb898558SAl Viro 310abfb9498SDmitry Safonov static inline bool in_x32_syscall(void) 311a628b684SH. Peter Anvin { 312fca460f9SH. Peter Anvin #ifdef CONFIG_X86_X32_ABI 313fca460f9SH. Peter Anvin if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 314fca460f9SH. Peter Anvin return true; 315fca460f9SH. Peter Anvin #endif 316fca460f9SH. Peter Anvin return false; 317bb898558SAl Viro } 318bb898558SAl Viro 319f970165bSAndy Lutomirski static inline bool in_compat_syscall(void) 320a628b684SH. Peter Anvin { 321abfb9498SDmitry Safonov return in_ia32_syscall() || in_x32_syscall(); 322a628b684SH. Peter Anvin } 323f970165bSAndy Lutomirski #define in_compat_syscall in_compat_syscall /* override the generic impl */ 324a628b684SH. Peter Anvin 3251965aae3SH. Peter Anvin #endif /* _ASM_X86_COMPAT_H */ 326