1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_COMPAT_H
3 #define _ASM_X86_COMPAT_H
6 * Architecture specific compatibility types
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>
15 #define COMPAT_USER_HZ 100
16 #define COMPAT_UTS_MACHINE "i686\0\0"
18 typedef u32 compat_size_t;
19 typedef s32 compat_ssize_t;
20 typedef s32 compat_time_t;
21 typedef s32 compat_clock_t;
22 typedef s32 compat_pid_t;
23 typedef u16 __compat_uid_t;
24 typedef u16 __compat_gid_t;
25 typedef u32 __compat_uid32_t;
26 typedef u32 __compat_gid32_t;
27 typedef u16 compat_mode_t;
28 typedef u32 compat_ino_t;
29 typedef u16 compat_dev_t;
30 typedef s32 compat_off_t;
31 typedef s64 compat_loff_t;
32 typedef u16 compat_nlink_t;
33 typedef u16 compat_ipc_pid_t;
34 typedef s32 compat_daddr_t;
35 typedef u32 compat_caddr_t;
36 typedef __kernel_fsid_t compat_fsid_t;
37 typedef s32 compat_timer_t;
38 typedef s32 compat_key_t;
40 typedef s32 compat_int_t;
41 typedef s32 compat_long_t;
42 typedef s64 __attribute__((aligned(4))) compat_s64;
43 typedef u32 compat_uint_t;
44 typedef u32 compat_ulong_t;
45 typedef u32 compat_u32;
46 typedef u64 __attribute__((aligned(4))) compat_u64;
47 typedef u32 compat_uptr_t;
49 struct compat_timespec {
54 struct compat_timeval {
63 compat_mode_t st_mode;
64 compat_nlink_t st_nlink;
65 __compat_uid_t st_uid;
66 __compat_gid_t st_gid;
90 #define F_GETLK64 12 /* using 'struct flock64' */
95 * IA32 uses 4 byte alignment for 64 bit quantities,
96 * so we need to pack this structure.
98 struct compat_flock64 {
101 compat_loff_t l_start;
104 } __attribute__((packed));
106 struct compat_statfs {
114 compat_fsid_t f_fsid;
115 int f_namelen; /* SunOS ignores this field. */
121 #define COMPAT_RLIM_INFINITY 0xffffffff
123 typedef u32 compat_old_sigset_t; /* at least 32 bits */
125 #define _COMPAT_NSIG 64
126 #define _COMPAT_NSIG_BPW 32
128 typedef u32 compat_sigset_word;
130 typedef union compat_sigval {
131 compat_int_t sival_int;
132 compat_uptr_t sival_ptr;
135 typedef struct compat_siginfo {
141 int _pad[128/sizeof(int) - 3];
145 unsigned int _pid; /* sender's pid */
146 unsigned int _uid; /* sender's uid */
149 /* POSIX.1b timers */
151 compat_timer_t _tid; /* timer id */
152 int _overrun; /* overrun count */
153 compat_sigval_t _sigval; /* same as below */
154 int _sys_private; /* not to be passed to user */
155 int _overrun_incr; /* amount to add to overrun */
158 /* POSIX.1b signals */
160 unsigned int _pid; /* sender's pid */
161 unsigned int _uid; /* sender's uid */
162 compat_sigval_t _sigval;
167 unsigned int _pid; /* which child */
168 unsigned int _uid; /* sender's uid */
169 int _status; /* exit code */
170 compat_clock_t _utime;
171 compat_clock_t _stime;
174 /* SIGCHLD (x32 version) */
176 unsigned int _pid; /* which child */
177 unsigned int _uid; /* sender's uid */
178 int _status; /* exit code */
183 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
185 unsigned int _addr; /* faulting insn/memory ref. */
186 short int _addr_lsb; /* Valid LSB of the reported address. */
188 /* used when si_code=SEGV_BNDERR */
190 compat_uptr_t _lower;
191 compat_uptr_t _upper;
193 /* used when si_code=SEGV_PKUERR */
200 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
205 unsigned int _call_addr; /* calling insn */
206 int _syscall; /* triggering system call number */
207 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
212 #define COMPAT_OFF_T_MAX 0x7fffffff
213 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
215 struct compat_ipc64_perm {
217 __compat_uid32_t uid;
218 __compat_gid32_t gid;
219 __compat_uid32_t cuid;
220 __compat_gid32_t cgid;
222 unsigned short __pad1;
224 unsigned short __pad2;
225 compat_ulong_t unused1;
226 compat_ulong_t unused2;
229 struct compat_semid64_ds {
230 struct compat_ipc64_perm sem_perm;
231 compat_time_t sem_otime;
232 compat_ulong_t __unused1;
233 compat_time_t sem_ctime;
234 compat_ulong_t __unused2;
235 compat_ulong_t sem_nsems;
236 compat_ulong_t __unused3;
237 compat_ulong_t __unused4;
240 struct compat_msqid64_ds {
241 struct compat_ipc64_perm msg_perm;
242 compat_time_t msg_stime;
243 compat_ulong_t __unused1;
244 compat_time_t msg_rtime;
245 compat_ulong_t __unused2;
246 compat_time_t msg_ctime;
247 compat_ulong_t __unused3;
248 compat_ulong_t msg_cbytes;
249 compat_ulong_t msg_qnum;
250 compat_ulong_t msg_qbytes;
251 compat_pid_t msg_lspid;
252 compat_pid_t msg_lrpid;
253 compat_ulong_t __unused4;
254 compat_ulong_t __unused5;
257 struct compat_shmid64_ds {
258 struct compat_ipc64_perm shm_perm;
259 compat_size_t shm_segsz;
260 compat_time_t shm_atime;
261 compat_ulong_t __unused1;
262 compat_time_t shm_dtime;
263 compat_ulong_t __unused2;
264 compat_time_t shm_ctime;
265 compat_ulong_t __unused3;
266 compat_pid_t shm_cpid;
267 compat_pid_t shm_lpid;
268 compat_ulong_t shm_nattch;
269 compat_ulong_t __unused4;
270 compat_ulong_t __unused5;
274 * The type of struct elf_prstatus.pr_reg in compatible core dumps.
276 typedef struct user_regs_struct compat_elf_gregset_t;
278 /* Full regset -- prstatus on x32, otherwise on ia32 */
279 #define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296)
280 #define SET_PR_FPVALID(S, V, R) \
281 do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \
284 #ifdef CONFIG_X86_X32_ABI
285 #define COMPAT_USE_64BIT_TIME \
286 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
290 * A pointer passed in from user mode. This should not
291 * be used for syscall parameters, just declare them
292 * as pointers because the syscall entry code will have
293 * appropriately converted them already.
296 static inline void __user *compat_ptr(compat_uptr_t uptr)
298 return (void __user *)(unsigned long)uptr;
301 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
303 return (u32)(unsigned long)uptr;
306 static inline void __user *arch_compat_alloc_user_space(long len)
310 if (test_thread_flag(TIF_IA32)) {
311 sp = task_pt_regs(current)->sp;
313 /* -128 for the x32 ABI redzone */
314 sp = task_pt_regs(current)->sp - 128;
317 return (void __user *)round_down(sp - len, 16);
320 static inline bool in_x32_syscall(void)
322 #ifdef CONFIG_X86_X32_ABI
323 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
329 static inline bool in_compat_syscall(void)
331 return in_ia32_syscall() || in_x32_syscall();
333 #define in_compat_syscall in_compat_syscall /* override the generic impl */
335 #endif /* _ASM_X86_COMPAT_H */