1
2
3
4
5
6
7#ifndef _ASM_S390_SYSCALL_WRAPPER_H
8#define _ASM_S390_SYSCALL_WRAPPER_H
9
10#define __SC_TYPE(t, a) t
11
12#define SYSCALL_PT_ARG6(regs, m, t1, t2, t3, t4, t5, t6)\
13 SYSCALL_PT_ARG5(regs, m, t1, t2, t3, t4, t5), \
14 m(t6, (regs->gprs[7]))
15
16#define SYSCALL_PT_ARG5(regs, m, t1, t2, t3, t4, t5) \
17 SYSCALL_PT_ARG4(regs, m, t1, t2, t3, t4), \
18 m(t5, (regs->gprs[6]))
19
20#define SYSCALL_PT_ARG4(regs, m, t1, t2, t3, t4) \
21 SYSCALL_PT_ARG3(regs, m, t1, t2, t3), \
22 m(t4, (regs->gprs[5]))
23
24#define SYSCALL_PT_ARG3(regs, m, t1, t2, t3) \
25 SYSCALL_PT_ARG2(regs, m, t1, t2), \
26 m(t3, (regs->gprs[4]))
27
28#define SYSCALL_PT_ARG2(regs, m, t1, t2) \
29 SYSCALL_PT_ARG1(regs, m, t1), \
30 m(t2, (regs->gprs[3]))
31
32#define SYSCALL_PT_ARG1(regs, m, t1) \
33 m(t1, (regs->orig_gpr2))
34
35#define SYSCALL_PT_ARGS(x, ...) SYSCALL_PT_ARG##x(__VA_ARGS__)
36
37#ifdef CONFIG_COMPAT
38#define __SC_COMPAT_TYPE(t, a) \
39 __typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
40
41#define __SC_COMPAT_CAST(t, a) \
42({ \
43 long __ReS = a; \
44 \
45 BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \
46 !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t) && \
47 !__TYPE_IS_LL(t)); \
48 if (__TYPE_IS_L(t)) \
49 __ReS = (s32)a; \
50 if (__TYPE_IS_UL(t)) \
51 __ReS = (u32)a; \
52 if (__TYPE_IS_PTR(t)) \
53 __ReS = a & 0x7fffffff; \
54 if (__TYPE_IS_LL(t)) \
55 return -ENOSYS; \
56 (t)__ReS; \
57})
58
59#define __S390_SYS_STUBx(x, name, ...) \
60 long __s390_sys##name(struct pt_regs *regs); \
61 ALLOW_ERROR_INJECTION(__s390_sys##name, ERRNO); \
62 long __s390_sys##name(struct pt_regs *regs) \
63 { \
64 long ret = __do_sys##name(SYSCALL_PT_ARGS(x, regs, \
65 __SC_COMPAT_CAST, __MAP(x, __SC_TYPE, __VA_ARGS__))); \
66 __MAP(x,__SC_TEST,__VA_ARGS__); \
67 return ret; \
68 }
69
70
71
72
73
74#define COMPAT_SYSCALL_DEFINE0(sname) \
75 SYSCALL_METADATA(_##sname, 0); \
76 long __s390_compat_sys_##sname(void); \
77 ALLOW_ERROR_INJECTION(__s390_compat_sys_##sname, ERRNO); \
78 long __s390_compat_sys_##sname(void)
79
80#define SYSCALL_DEFINE0(sname) \
81 SYSCALL_METADATA(_##sname, 0); \
82 long __s390x_sys_##sname(void); \
83 ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO); \
84 long __s390_sys_##sname(void) \
85 __attribute__((alias(__stringify(__s390x_sys_##sname)))); \
86 long __s390x_sys_##sname(void)
87
88#define COND_SYSCALL(name) \
89 cond_syscall(__s390x_sys_##name); \
90 cond_syscall(__s390_sys_##name)
91
92#define SYS_NI(name) \
93 SYSCALL_ALIAS(__s390x_sys_##name, sys_ni_posix_timers); \
94 SYSCALL_ALIAS(__s390_sys_##name, sys_ni_posix_timers)
95
96#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
97 __diag_push(); \
98 __diag_ignore(GCC, 8, "-Wattribute-alias", \
99 "Type aliasing is used to sanitize syscall arguments"); \
100 long __s390_compat_sys##name(struct pt_regs *regs); \
101 long __s390_compat_sys##name(struct pt_regs *regs) \
102 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
103 ALLOW_ERROR_INJECTION(__s390_compat_sys##name, ERRNO); \
104 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
105 long __se_compat_sys##name(struct pt_regs *regs); \
106 long __se_compat_sys##name(struct pt_regs *regs) \
107 { \
108 long ret = __do_compat_sys##name(SYSCALL_PT_ARGS(x, regs, __SC_DELOUSE, \
109 __MAP(x, __SC_TYPE, __VA_ARGS__))); \
110 __MAP(x,__SC_TEST,__VA_ARGS__); \
111 return ret; \
112 } \
113 __diag_pop(); \
114 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
115
116
117
118
119
120
121#define COND_SYSCALL_COMPAT(name) \
122 cond_syscall(__s390_compat_sys_##name)
123
124#define COMPAT_SYS_NI(name) \
125 SYSCALL_ALIAS(__s390_compat_sys_##name, sys_ni_posix_timers)
126
127#else
128
129#define __S390_SYS_STUBx(x, fullname, name, ...)
130
131#define SYSCALL_DEFINE0(sname) \
132 SYSCALL_METADATA(_##sname, 0); \
133 long __s390x_sys_##sname(void); \
134 ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO); \
135 long __s390x_sys_##sname(void)
136
137#define COND_SYSCALL(name) \
138 cond_syscall(__s390x_sys_##name)
139
140#define SYS_NI(name) \
141 SYSCALL_ALIAS(__s390x_sys_##name, sys_ni_posix_timers);
142
143#endif
144
145#define __SYSCALL_DEFINEx(x, name, ...) \
146 __diag_push(); \
147 __diag_ignore(GCC, 8, "-Wattribute-alias", \
148 "Type aliasing is used to sanitize syscall arguments"); \
149 long __s390x_sys##name(struct pt_regs *regs) \
150 __attribute__((alias(__stringify(__se_sys##name)))); \
151 ALLOW_ERROR_INJECTION(__s390x_sys##name, ERRNO); \
152 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
153 long __se_sys##name(struct pt_regs *regs); \
154 __S390_SYS_STUBx(x, name, __VA_ARGS__) \
155 long __se_sys##name(struct pt_regs *regs) \
156 { \
157 long ret = __do_sys##name(SYSCALL_PT_ARGS(x, regs, \
158 __SC_CAST, __MAP(x, __SC_TYPE, __VA_ARGS__))); \
159 __MAP(x,__SC_TEST,__VA_ARGS__); \
160 return ret; \
161 } \
162 __diag_pop(); \
163 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
164
165#endif
166
