1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * syscall_wrapper.h - arm64 specific wrappers to syscall definitions 4 * 5 * Based on arch/x86/include/asm_syscall_wrapper.h 6 */ 7 8 #ifndef __ASM_SYSCALL_WRAPPER_H 9 #define __ASM_SYSCALL_WRAPPER_H 10 11 #define SC_ARM64_REGS_TO_ARGS(x, ...) \ 12 __MAP(x,__SC_ARGS \ 13 ,,regs->regs[0],,regs->regs[1],,regs->regs[2] \ 14 ,,regs->regs[3],,regs->regs[4],,regs->regs[5]) 15 16 #ifdef CONFIG_COMPAT 17 18 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ 19 asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs); \ 20 ALLOW_ERROR_INJECTION(__arm64_compat_sys##name, ERRNO); \ 21 static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 22 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ 23 asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs) \ 24 { \ 25 return __se_compat_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \ 26 } \ 27 static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 28 { \ 29 return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \ 30 } \ 31 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 32 33 #define COMPAT_SYSCALL_DEFINE0(sname) \ 34 asmlinkage long __arm64_compat_sys_##sname(void); \ 35 ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \ 36 asmlinkage long __arm64_compat_sys_##sname(void) 37 38 #define COND_SYSCALL_COMPAT(name) \ 39 cond_syscall(__arm64_compat_sys_##name); 40 41 #define COMPAT_SYS_NI(name) \ 42 SYSCALL_ALIAS(__arm64_compat_sys_##name, sys_ni_posix_timers); 43 44 #endif /* CONFIG_COMPAT */ 45 46 #define __SYSCALL_DEFINEx(x, name, ...) \ 47 asmlinkage long __arm64_sys##name(const struct pt_regs *regs); \ 48 ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO); \ 49 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 50 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ 51 asmlinkage long __arm64_sys##name(const struct pt_regs *regs) \ 52 { \ 53 return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \ 54 } \ 55 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 56 { \ 57 long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \ 58 __MAP(x,__SC_TEST,__VA_ARGS__); \ 59 __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \ 60 return ret; \ 61 } \ 62 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 63 64 #ifndef SYSCALL_DEFINE0 65 #define SYSCALL_DEFINE0(sname) \ 66 SYSCALL_METADATA(_##sname, 0); \ 67 asmlinkage long __arm64_sys_##sname(void); \ 68 ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \ 69 asmlinkage long __arm64_sys_##sname(void) 70 #endif 71 72 #ifndef COND_SYSCALL 73 #define COND_SYSCALL(name) cond_syscall(__arm64_sys_##name) 74 #endif 75 76 #ifndef SYS_NI 77 #define SYS_NI(name) SYSCALL_ALIAS(__arm64_sys_##name, sys_ni_posix_timers); 78 #endif 79 80 #endif /* __ASM_SYSCALL_WRAPPER_H */ 81