1 #ifndef __ASM_COMPAT_SIGNAL_H
2 #define __ASM_COMPAT_SIGNAL_H
3 
4 #include <linux/bug.h>
5 #include <linux/compat.h>
6 #include <linux/compiler.h>
7 
8 #include <asm/signal.h>
9 #include <asm/siginfo.h>
10 
11 #include <asm/uaccess.h>
12 
13 #define SI_PAD_SIZE32   ((SI_MAX_SIZE/sizeof(int)) - 3)
14 
15 typedef struct compat_siginfo {
16 	int si_signo;
17 	int si_code;
18 	int si_errno;
19 
20 	union {
21 		int _pad[SI_PAD_SIZE32];
22 
23 		/* kill() */
24 		struct {
25 			compat_pid_t _pid;	/* sender's pid */
26 			compat_uid_t _uid;	/* sender's uid */
27 		} _kill;
28 
29 		/* SIGCHLD */
30 		struct {
31 			compat_pid_t _pid;	/* which child */
32 			compat_uid_t _uid;	/* sender's uid */
33 			int _status;		/* exit code */
34 			compat_clock_t _utime;
35 			compat_clock_t _stime;
36 		} _sigchld;
37 
38 		/* IRIX SIGCHLD */
39 		struct {
40 			compat_pid_t _pid;	/* which child */
41 			compat_clock_t _utime;
42 			int _status;		/* exit code */
43 			compat_clock_t _stime;
44 		} _irix_sigchld;
45 
46 		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
47 		struct {
48 			s32 _addr; /* faulting insn/memory ref. */
49 		} _sigfault;
50 
51 		/* SIGPOLL, SIGXFSZ (To do ...)  */
52 		struct {
53 			int _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
54 			int _fd;
55 		} _sigpoll;
56 
57 		/* POSIX.1b timers */
58 		struct {
59 			timer_t _tid;		/* timer id */
60 			int _overrun;		/* overrun count */
61 			compat_sigval_t _sigval;/* same as below */
62 			int _sys_private;       /* not to be passed to user */
63 		} _timer;
64 
65 		/* POSIX.1b signals */
66 		struct {
67 			compat_pid_t _pid;	/* sender's pid */
68 			compat_uid_t _uid;	/* sender's uid */
69 			compat_sigval_t _sigval;
70 		} _rt;
71 
72 	} _sifields;
73 } compat_siginfo_t;
74 
75 static inline int __copy_conv_sigset_to_user(compat_sigset_t __user *d,
76 	const sigset_t *s)
77 {
78 	int err;
79 
80 	BUG_ON(sizeof(*d) != sizeof(*s));
81 	BUG_ON(_NSIG_WORDS != 2);
82 
83 	err  = __put_user(s->sig[0],       &d->sig[0]);
84 	err |= __put_user(s->sig[0] >> 32, &d->sig[1]);
85 	err |= __put_user(s->sig[1],       &d->sig[2]);
86 	err |= __put_user(s->sig[1] >> 32, &d->sig[3]);
87 
88 	return err;
89 }
90 
91 static inline int __copy_conv_sigset_from_user(sigset_t *d,
92 	const compat_sigset_t __user *s)
93 {
94 	int err;
95 	union sigset_u {
96 		sigset_t	s;
97 		compat_sigset_t c;
98 	} *u = (union sigset_u *) d;
99 
100 	BUG_ON(sizeof(*d) != sizeof(*s));
101 	BUG_ON(_NSIG_WORDS != 2);
102 
103 #ifdef CONFIG_CPU_BIG_ENDIAN
104 	err  = __get_user(u->c.sig[1], &s->sig[0]);
105 	err |= __get_user(u->c.sig[0], &s->sig[1]);
106 	err |= __get_user(u->c.sig[3], &s->sig[2]);
107 	err |= __get_user(u->c.sig[2], &s->sig[3]);
108 #endif
109 #ifdef CONFIG_CPU_LITTLE_ENDIAN
110 	err  = __get_user(u->c.sig[0], &s->sig[0]);
111 	err |= __get_user(u->c.sig[1], &s->sig[1]);
112 	err |= __get_user(u->c.sig[2], &s->sig[2]);
113 	err |= __get_user(u->c.sig[3], &s->sig[3]);
114 #endif
115 
116 	return err;
117 }
118 
119 #endif /* __ASM_COMPAT_SIGNAL_H */
120