/* SPDX-License-Identifier: GPL-2.0 */
/*
 * syscall_wrapper.h - arm64 specific wrappers to syscall definitions
 *
 * Based on arch/x86/include/asm_syscall_wrapper.h
 */

#ifndef __ASM_SYSCALL_WRAPPER_H
#define __ASM_SYSCALL_WRAPPER_H

#include <asm/ptrace.h>

#define SC_ARM64_REGS_TO_ARGS(x, ...)                           \
        __MAP(x,__SC_ARGS                                       \
              ,,regs->regs[0],,regs->regs[1],,regs->regs[2]     \
              ,,regs->regs[3],,regs->regs[4],,regs->regs[5])

#ifdef CONFIG_COMPAT

#define COMPAT_SYSCALL_DEFINEx(x, name, ...)                                            \
        asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs);           \
        ALLOW_ERROR_INJECTION(__arm64_compat_sys##name, ERRNO);                         \
        static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));              \
        static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));       \
        asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs)            \
        {                                                                               \
                return __se_compat_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__));     \
        }                                                                               \
        static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))               \
        {                                                                               \
                return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));        \
        }                                                                               \
        static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))

#define COMPAT_SYSCALL_DEFINE0(sname)                                                   \
        asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused);     \
        ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO);                       \
        asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused)

#define COND_SYSCALL_COMPAT(name)                                                       \
        asmlinkage long __arm64_compat_sys_##name(const struct pt_regs *regs);          \
        asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs)    \
        {                                                                               \
                return sys_ni_syscall();                                                \
        }

#endif /* CONFIG_COMPAT */

#define __SYSCALL_DEFINEx(x, name, ...)                                         \
        asmlinkage long __arm64_sys##name(const struct pt_regs *regs);          \
        ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO);                        \
        static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));             \
        static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));      \
        asmlinkage long __arm64_sys##name(const struct pt_regs *regs)           \
        {                                                                       \
                return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__));    \
        }                                                                       \
        static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))              \
        {                                                                       \
                long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));      \
                __MAP(x,__SC_TEST,__VA_ARGS__);                                 \
                __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__));               \
                return ret;                                                     \
        }                                                                       \
        static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))

#define SYSCALL_DEFINE0(sname)                                                  \
        SYSCALL_METADATA(_##sname, 0);                                          \
        asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused);    \
        ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO);                      \
        asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused)

#define COND_SYSCALL(name)                                                      \
        asmlinkage long __arm64_sys_##name(const struct pt_regs *regs);         \
        asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
        {                                                                       \
                return sys_ni_syscall();                                        \
        }

asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused);

#endif /* __ASM_SYSCALL_WRAPPER_H */