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Diffstat (limited to 'arch/s390/include/asm/syscall_wrapper.h')
-rw-r--r--arch/s390/include/asm/syscall_wrapper.h174
1 files changed, 29 insertions, 145 deletions
diff --git a/arch/s390/include/asm/syscall_wrapper.h b/arch/s390/include/asm/syscall_wrapper.h
index fde7e6b1df48..9eb58d5348d8 100644
--- a/arch/s390/include/asm/syscall_wrapper.h
+++ b/arch/s390/include/asm/syscall_wrapper.h
@@ -7,159 +7,43 @@
#ifndef _ASM_S390_SYSCALL_WRAPPER_H
#define _ASM_S390_SYSCALL_WRAPPER_H
-#define __SC_TYPE(t, a) t
-
-#define SYSCALL_PT_ARG6(regs, m, t1, t2, t3, t4, t5, t6)\
- SYSCALL_PT_ARG5(regs, m, t1, t2, t3, t4, t5), \
- m(t6, (regs->gprs[7]))
-
-#define SYSCALL_PT_ARG5(regs, m, t1, t2, t3, t4, t5) \
- SYSCALL_PT_ARG4(regs, m, t1, t2, t3, t4), \
- m(t5, (regs->gprs[6]))
-
-#define SYSCALL_PT_ARG4(regs, m, t1, t2, t3, t4) \
- SYSCALL_PT_ARG3(regs, m, t1, t2, t3), \
- m(t4, (regs->gprs[5]))
-
-#define SYSCALL_PT_ARG3(regs, m, t1, t2, t3) \
- SYSCALL_PT_ARG2(regs, m, t1, t2), \
- m(t3, (regs->gprs[4]))
-
-#define SYSCALL_PT_ARG2(regs, m, t1, t2) \
- SYSCALL_PT_ARG1(regs, m, t1), \
- m(t2, (regs->gprs[3]))
-
-#define SYSCALL_PT_ARG1(regs, m, t1) \
- m(t1, (regs->orig_gpr2))
-
-#define SYSCALL_PT_ARGS(x, ...) SYSCALL_PT_ARG##x(__VA_ARGS__)
-
-#ifdef CONFIG_COMPAT
-#define __SC_COMPAT_TYPE(t, a) \
- __typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
-
-#define __SC_COMPAT_CAST(t, a) \
-({ \
- long __ReS = a; \
- \
- BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \
- !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t) && \
- !__TYPE_IS_LL(t)); \
- if (__TYPE_IS_L(t)) \
- __ReS = (s32)a; \
- if (__TYPE_IS_UL(t)) \
- __ReS = (u32)a; \
- if (__TYPE_IS_PTR(t)) \
- __ReS = a & 0x7fffffff; \
- if (__TYPE_IS_LL(t)) \
- return -ENOSYS; \
- (t)__ReS; \
-})
-
-#define __S390_SYS_STUBx(x, name, ...) \
- long __s390_sys##name(struct pt_regs *regs); \
- ALLOW_ERROR_INJECTION(__s390_sys##name, ERRNO); \
- long __s390_sys##name(struct pt_regs *regs) \
- { \
- long ret = __do_sys##name(SYSCALL_PT_ARGS(x, regs, \
- __SC_COMPAT_CAST, __MAP(x, __SC_TYPE, __VA_ARGS__))); \
- __MAP(x,__SC_TEST,__VA_ARGS__); \
- return ret; \
- }
-
-/*
- * To keep the naming coherent, re-define SYSCALL_DEFINE0 to create an alias
- * named __s390x_sys_*()
- */
-#define COMPAT_SYSCALL_DEFINE0(sname) \
- SYSCALL_METADATA(_##sname, 0); \
- long __s390_compat_sys_##sname(void); \
- ALLOW_ERROR_INJECTION(__s390_compat_sys_##sname, ERRNO); \
- long __s390_compat_sys_##sname(void)
-
-#define SYSCALL_DEFINE0(sname) \
- SYSCALL_METADATA(_##sname, 0); \
- long __s390x_sys_##sname(void); \
- ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO); \
- long __s390_sys_##sname(void) \
- __attribute__((alias(__stringify(__s390x_sys_##sname)))); \
- long __s390x_sys_##sname(void)
-
-#define COND_SYSCALL(name) \
- cond_syscall(__s390x_sys_##name); \
- cond_syscall(__s390_sys_##name)
-
-#define SYS_NI(name) \
- SYSCALL_ALIAS(__s390x_sys_##name, sys_ni_posix_timers); \
- SYSCALL_ALIAS(__s390_sys_##name, sys_ni_posix_timers)
-
-#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
- __diag_push(); \
- __diag_ignore(GCC, 8, "-Wattribute-alias", \
- "Type aliasing is used to sanitize syscall arguments"); \
- long __s390_compat_sys##name(struct pt_regs *regs); \
- long __s390_compat_sys##name(struct pt_regs *regs) \
- __attribute__((alias(__stringify(__se_compat_sys##name)))); \
- ALLOW_ERROR_INJECTION(__s390_compat_sys##name, ERRNO); \
- static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
- long __se_compat_sys##name(struct pt_regs *regs); \
- long __se_compat_sys##name(struct pt_regs *regs) \
- { \
- long ret = __do_compat_sys##name(SYSCALL_PT_ARGS(x, regs, __SC_DELOUSE, \
- __MAP(x, __SC_TYPE, __VA_ARGS__))); \
- __MAP(x,__SC_TEST,__VA_ARGS__); \
- return ret; \
- } \
- __diag_pop(); \
- static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
-
-/*
- * As some compat syscalls may not be implemented, we need to expand
- * COND_SYSCALL_COMPAT in kernel/sys_ni.c and COMPAT_SYS_NI in
- * kernel/time/posix-stubs.c to cover this case as well.
- */
-#define COND_SYSCALL_COMPAT(name) \
- cond_syscall(__s390_compat_sys_##name)
-
-#define COMPAT_SYS_NI(name) \
- SYSCALL_ALIAS(__s390_compat_sys_##name, sys_ni_posix_timers)
-
-#else /* CONFIG_COMPAT */
-
-#define __S390_SYS_STUBx(x, fullname, name, ...)
+/* Mapping of registers to parameters for syscalls */
+#define SC_S390_REGS_TO_ARGS(x, ...) \
+ __MAP(x, __SC_ARGS \
+ ,, regs->orig_gpr2,, regs->gprs[3],, regs->gprs[4] \
+ ,, regs->gprs[5],, regs->gprs[6],, regs->gprs[7])
#define SYSCALL_DEFINE0(sname) \
SYSCALL_METADATA(_##sname, 0); \
- long __s390x_sys_##sname(void); \
+ long __s390x_sys_##sname(struct pt_regs *__unused); \
ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO); \
- long __s390x_sys_##sname(void)
+ static inline long __do_sys_##sname(void); \
+ long __s390x_sys_##sname(struct pt_regs *__unused) \
+ { \
+ return __do_sys_##sname(); \
+ } \
+ static inline long __do_sys_##sname(void)
#define COND_SYSCALL(name) \
cond_syscall(__s390x_sys_##name)
-#define SYS_NI(name) \
- SYSCALL_ALIAS(__s390x_sys_##name, sys_ni_posix_timers);
-
-#endif /* CONFIG_COMPAT */
+#define __S390_SYS_STUBx(x, fullname, name, ...)
-#define __SYSCALL_DEFINEx(x, name, ...) \
- __diag_push(); \
- __diag_ignore(GCC, 8, "-Wattribute-alias", \
- "Type aliasing is used to sanitize syscall arguments"); \
- long __s390x_sys##name(struct pt_regs *regs) \
- __attribute__((alias(__stringify(__se_sys##name)))); \
- ALLOW_ERROR_INJECTION(__s390x_sys##name, ERRNO); \
- static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
- long __se_sys##name(struct pt_regs *regs); \
- __S390_SYS_STUBx(x, name, __VA_ARGS__) \
- long __se_sys##name(struct pt_regs *regs) \
- { \
- long ret = __do_sys##name(SYSCALL_PT_ARGS(x, regs, \
- __SC_CAST, __MAP(x, __SC_TYPE, __VA_ARGS__))); \
- __MAP(x,__SC_TEST,__VA_ARGS__); \
- return ret; \
- } \
- __diag_pop(); \
- static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
+#define __SYSCALL_DEFINEx(x, name, ...) \
+ long __s390x_sys##name(struct pt_regs *regs); \
+ ALLOW_ERROR_INJECTION(__s390x_sys##name, ERRNO); \
+ static inline long __se_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__)); \
+ static inline long __do_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__)); \
+ __S390_SYS_STUBx(x, name, __VA_ARGS__); \
+ long __s390x_sys##name(struct pt_regs *regs) \
+ { \
+ return __se_sys##name(SC_S390_REGS_TO_ARGS(x, __VA_ARGS__)); \
+ } \
+ static inline long __se_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__)) \
+ { \
+ __MAP(x, __SC_TEST, __VA_ARGS__); \
+ return __do_sys##name(__MAP(x, __SC_CAST, __VA_ARGS__)); \
+ } \
+ static inline long __do_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__))
#endif /* _ASM_S390_SYSCALL_WRAPPER_H */
generated by cgit (git 2.34.1) at 2025-12-24 20:04:26 +0000