1 #ifndef _ASM_X86_COMPAT_H
2 #define _ASM_X86_COMPAT_H
5 * Architecture specific compatibility types
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>
13 #define COMPAT_USER_HZ 100
14 #define COMPAT_UTS_MACHINE "i686\0\0"
16 typedef u32 compat_size_t;
17 typedef s32 compat_ssize_t;
18 typedef s32 compat_time_t;
19 typedef s32 compat_clock_t;
20 typedef s32 compat_pid_t;
21 typedef u16 __compat_uid_t;
22 typedef u16 __compat_gid_t;
23 typedef u32 __compat_uid32_t;
24 typedef u32 __compat_gid32_t;
25 typedef u16 compat_mode_t;
26 typedef u32 compat_ino_t;
27 typedef u16 compat_dev_t;
28 typedef s32 compat_off_t;
29 typedef s64 compat_loff_t;
30 typedef u16 compat_nlink_t;
31 typedef u16 compat_ipc_pid_t;
32 typedef s32 compat_daddr_t;
33 typedef u32 compat_caddr_t;
34 typedef __kernel_fsid_t compat_fsid_t;
35 typedef s32 compat_timer_t;
36 typedef s32 compat_key_t;
38 typedef s32 compat_int_t;
39 typedef s32 compat_long_t;
40 typedef s64 __attribute__((aligned(4))) compat_s64;
41 typedef u32 compat_uint_t;
42 typedef u32 compat_ulong_t;
43 typedef u64 __attribute__((aligned(4))) compat_u64;
44 typedef u32 compat_uptr_t;
46 struct compat_timespec {
51 struct compat_timeval {
60 compat_mode_t st_mode;
61 compat_nlink_t st_nlink;
62 __compat_uid_t st_uid;
63 __compat_gid_t st_gid;
87 #define F_GETLK64 12 /* using 'struct flock64' */
92 * IA32 uses 4 byte alignment for 64 bit quantities,
93 * so we need to pack this structure.
95 struct compat_flock64 {
98 compat_loff_t l_start;
101 } __attribute__((packed));
103 struct compat_statfs {
111 compat_fsid_t f_fsid;
112 int f_namelen; /* SunOS ignores this field. */
118 #define COMPAT_RLIM_OLD_INFINITY 0x7fffffff
119 #define COMPAT_RLIM_INFINITY 0xffffffff
121 typedef u32 compat_old_sigset_t; /* at least 32 bits */
123 #define _COMPAT_NSIG 64
124 #define _COMPAT_NSIG_BPW 32
126 typedef u32 compat_sigset_word;
128 typedef union compat_sigval {
129 compat_int_t sival_int;
130 compat_uptr_t sival_ptr;
133 typedef struct compat_siginfo {
139 int _pad[128/sizeof(int) - 3];
143 unsigned int _pid; /* sender's pid */
144 unsigned int _uid; /* sender's uid */
147 /* POSIX.1b timers */
149 compat_timer_t _tid; /* timer id */
150 int _overrun; /* overrun count */
151 compat_sigval_t _sigval; /* same as below */
152 int _sys_private; /* not to be passed to user */
153 int _overrun_incr; /* amount to add to overrun */
156 /* POSIX.1b signals */
158 unsigned int _pid; /* sender's pid */
159 unsigned int _uid; /* sender's uid */
160 compat_sigval_t _sigval;
165 unsigned int _pid; /* which child */
166 unsigned int _uid; /* sender's uid */
167 int _status; /* exit code */
168 compat_clock_t _utime;
169 compat_clock_t _stime;
172 /* SIGCHLD (x32 version) */
174 unsigned int _pid; /* which child */
175 unsigned int _uid; /* sender's uid */
176 int _status; /* exit code */
181 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
183 unsigned int _addr; /* faulting insn/memory ref. */
188 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
193 unsigned int _call_addr; /* calling insn */
194 int _syscall; /* triggering system call number */
195 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
200 #define COMPAT_OFF_T_MAX 0x7fffffff
201 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
203 struct compat_ipc64_perm {
205 __compat_uid32_t uid;
206 __compat_gid32_t gid;
207 __compat_uid32_t cuid;
208 __compat_gid32_t cgid;
210 unsigned short __pad1;
212 unsigned short __pad2;
213 compat_ulong_t unused1;
214 compat_ulong_t unused2;
217 struct compat_semid64_ds {
218 struct compat_ipc64_perm sem_perm;
219 compat_time_t sem_otime;
220 compat_ulong_t __unused1;
221 compat_time_t sem_ctime;
222 compat_ulong_t __unused2;
223 compat_ulong_t sem_nsems;
224 compat_ulong_t __unused3;
225 compat_ulong_t __unused4;
228 struct compat_msqid64_ds {
229 struct compat_ipc64_perm msg_perm;
230 compat_time_t msg_stime;
231 compat_ulong_t __unused1;
232 compat_time_t msg_rtime;
233 compat_ulong_t __unused2;
234 compat_time_t msg_ctime;
235 compat_ulong_t __unused3;
236 compat_ulong_t msg_cbytes;
237 compat_ulong_t msg_qnum;
238 compat_ulong_t msg_qbytes;
239 compat_pid_t msg_lspid;
240 compat_pid_t msg_lrpid;
241 compat_ulong_t __unused4;
242 compat_ulong_t __unused5;
245 struct compat_shmid64_ds {
246 struct compat_ipc64_perm shm_perm;
247 compat_size_t shm_segsz;
248 compat_time_t shm_atime;
249 compat_ulong_t __unused1;
250 compat_time_t shm_dtime;
251 compat_ulong_t __unused2;
252 compat_time_t shm_ctime;
253 compat_ulong_t __unused3;
254 compat_pid_t shm_cpid;
255 compat_pid_t shm_lpid;
256 compat_ulong_t shm_nattch;
257 compat_ulong_t __unused4;
258 compat_ulong_t __unused5;
262 * The type of struct elf_prstatus.pr_reg in compatible core dumps.
264 #ifdef CONFIG_X86_X32_ABI
265 typedef struct user_regs_struct compat_elf_gregset_t;
267 #define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)
268 #define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)
269 #define SET_PR_FPVALID(S,V) \
270 do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
273 #define COMPAT_USE_64BIT_TIME \
274 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
276 typedef struct user_regs_struct32 compat_elf_gregset_t;
280 * A pointer passed in from user mode. This should not
281 * be used for syscall parameters, just declare them
282 * as pointers because the syscall entry code will have
283 * appropriately converted them already.
286 static inline void __user *compat_ptr(compat_uptr_t uptr)
288 return (void __user *)(unsigned long)uptr;
291 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
293 return (u32)(unsigned long)uptr;
296 static inline void __user *arch_compat_alloc_user_space(long len)
300 if (test_thread_flag(TIF_IA32)) {
301 sp = task_pt_regs(current)->sp;
303 /* -128 for the x32 ABI redzone */
304 sp = this_cpu_read(old_rsp) - 128;
307 return (void __user *)round_down(sp - len, 16);
310 static inline bool is_x32_task(void)
312 #ifdef CONFIG_X86_X32_ABI
313 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
319 static inline bool is_compat_task(void)
321 return is_ia32_task() || is_x32_task();
324 #endif /* _ASM_X86_COMPAT_H */