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 #include <asm/ptrace.h> 12 13 #ifdef CONFIG_COMPAT 14 15 #define COMPAT_SC_ARM64_REGS_TO_ARGS(x, ...) \ 16 __MAP(x,__SC_ARGS \ 17 ,,regs->regs[0],,regs->regs[1],,regs->regs[2] \ 18 ,,regs->regs[3],,regs->regs[4],,regs->regs[5]) 19 20 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ 21 asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs); \ 22 ALLOW_ERROR_INJECTION(__arm64_compat_sys##name, ERRNO); \ 23 static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 24 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ 25 asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs) \ 26 { \ 27 return __se_compat_sys##name(COMPAT_SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \ 28 } \ 29 static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 30 { \ 31 return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \ 32 } \ 33 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 34 35 #define COMPAT_SYSCALL_DEFINE0(sname) \ 36 asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused); \ 37 ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \ 38 asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused) 39 40 #define COND_SYSCALL_COMPAT(name) \ 41 asmlinkage long __arm64_compat_sys_##name(const struct pt_regs *regs); \ 42 asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs) \ 43 { \ 44 return sys_ni_syscall(); \ 45 } 46 47 #endif /* CONFIG_COMPAT */ 48 49 #define SC_ARM64_REGS_TO_ARGS(x, ...) \ 50 __MAP(x,__SC_ARGS \ 51 ,,regs->orig_x0,,regs->regs[1],,regs->regs[2] \ 52 ,,regs->regs[3],,regs->regs[4],,regs->regs[5]) 53 54 #define __SYSCALL_DEFINEx(x, name, ...) \ 55 asmlinkage long __arm64_sys##name(const struct pt_regs *regs); \ 56 ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO); \ 57 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 58 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ 59 asmlinkage long __arm64_sys##name(const struct pt_regs *regs) \ 60 { \ 61 return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \ 62 } \ 63 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 64 { \ 65 long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \ 66 __MAP(x,__SC_TEST,__VA_ARGS__); \ 67 __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \ 68 return ret; \ 69 } \ 70 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 71 72 #define SYSCALL_DEFINE0(sname) \ 73 SYSCALL_METADATA(_##sname, 0); \ 74 asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused); \ 75 ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \ 76 asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused) 77 78 #define COND_SYSCALL(name) \ 79 asmlinkage long __arm64_sys_##name(const struct pt_regs *regs); \ 80 asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ 81 { \ 82 return sys_ni_syscall(); \ 83 } 84 85 asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused); 86 87 #endif /* __ASM_SYSCALL_WRAPPER_H */ 88