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;
45 struct compat_timespec {
50 struct compat_timeval {
59 compat_mode_t st_mode;
60 compat_nlink_t st_nlink;
61 __compat_uid_t st_uid;
62 __compat_gid_t st_gid;
86 #define F_GETLK64 12 /* using 'struct flock64' */
91 * IA32 uses 4 byte alignment for 64 bit quantities,
92 * so we need to pack this structure.
94 struct compat_flock64 {
97 compat_loff_t l_start;
100 } __attribute__((packed));
102 struct compat_statfs {
110 compat_fsid_t f_fsid;
111 int f_namelen; /* SunOS ignores this field. */
117 #define COMPAT_RLIM_OLD_INFINITY 0x7fffffff
118 #define COMPAT_RLIM_INFINITY 0xffffffff
120 typedef u32 compat_old_sigset_t; /* at least 32 bits */
122 #define _COMPAT_NSIG 64
123 #define _COMPAT_NSIG_BPW 32
125 typedef u32 compat_sigset_word;
127 #define COMPAT_OFF_T_MAX 0x7fffffff
128 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
130 struct compat_ipc64_perm {
132 __compat_uid32_t uid;
133 __compat_gid32_t gid;
134 __compat_uid32_t cuid;
135 __compat_gid32_t cgid;
137 unsigned short __pad1;
139 unsigned short __pad2;
140 compat_ulong_t unused1;
141 compat_ulong_t unused2;
144 struct compat_semid64_ds {
145 struct compat_ipc64_perm sem_perm;
146 compat_time_t sem_otime;
147 compat_ulong_t __unused1;
148 compat_time_t sem_ctime;
149 compat_ulong_t __unused2;
150 compat_ulong_t sem_nsems;
151 compat_ulong_t __unused3;
152 compat_ulong_t __unused4;
155 struct compat_msqid64_ds {
156 struct compat_ipc64_perm msg_perm;
157 compat_time_t msg_stime;
158 compat_ulong_t __unused1;
159 compat_time_t msg_rtime;
160 compat_ulong_t __unused2;
161 compat_time_t msg_ctime;
162 compat_ulong_t __unused3;
163 compat_ulong_t msg_cbytes;
164 compat_ulong_t msg_qnum;
165 compat_ulong_t msg_qbytes;
166 compat_pid_t msg_lspid;
167 compat_pid_t msg_lrpid;
168 compat_ulong_t __unused4;
169 compat_ulong_t __unused5;
172 struct compat_shmid64_ds {
173 struct compat_ipc64_perm shm_perm;
174 compat_size_t shm_segsz;
175 compat_time_t shm_atime;
176 compat_ulong_t __unused1;
177 compat_time_t shm_dtime;
178 compat_ulong_t __unused2;
179 compat_time_t shm_ctime;
180 compat_ulong_t __unused3;
181 compat_pid_t shm_cpid;
182 compat_pid_t shm_lpid;
183 compat_ulong_t shm_nattch;
184 compat_ulong_t __unused4;
185 compat_ulong_t __unused5;
189 * The type of struct elf_prstatus.pr_reg in compatible core dumps.
191 #ifdef CONFIG_X86_X32_ABI
192 typedef struct user_regs_struct compat_elf_gregset_t;
194 #define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)
195 #define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)
196 #define SET_PR_FPVALID(S,V) \
197 do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
200 #define COMPAT_USE_64BIT_TIME \
201 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
203 typedef struct user_regs_struct32 compat_elf_gregset_t;
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.
212 typedef u32 compat_uptr_t;
214 static inline void __user *compat_ptr(compat_uptr_t uptr)
216 return (void __user *)(unsigned long)uptr;
219 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
221 return (u32)(unsigned long)uptr;
224 static inline void __user *arch_compat_alloc_user_space(long len)
228 if (test_thread_flag(TIF_IA32)) {
229 sp = task_pt_regs(current)->sp;
231 /* -128 for the x32 ABI redzone */
232 sp = this_cpu_read(old_rsp) - 128;
235 return (void __user *)round_down(sp - len, 16);
238 static inline bool is_x32_task(void)
240 #ifdef CONFIG_X86_X32_ABI
241 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
247 static inline bool is_compat_task(void)
249 return is_ia32_task() || is_x32_task();
252 #endif /* _ASM_X86_COMPAT_H */