LXR linux/arch/arm64/include/asm/syscall

   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
  11struct pt_regs;
  12
  13#define SC_ARM64_REGS_TO_ARGS(x, ...)                           \
  14        __MAP(x,__SC_ARGS                                       \
  15              ,,regs->regs[0],,regs->regs[1],,regs->regs[2]     \
  16              ,,regs->regs[3],,regs->regs[4],,regs->regs[5])
  17
  18#ifdef CONFIG_COMPAT
  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(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 __weak __arm64_compat_sys_##name(const struct pt_regs *regs)    \
  42        {                                                                               \
  43                return sys_ni_syscall();                                                \
  44        }
  45
  46#define COMPAT_SYS_NI(name) \
  47        SYSCALL_ALIAS(__arm64_compat_sys_##name, sys_ni_posix_timers);
  48
  49#endif /* CONFIG_COMPAT */
  50
  51#define __SYSCALL_DEFINEx(x, name, ...)                                         \
  52        asmlinkage long __arm64_sys##name(const struct pt_regs *regs);          \
  53        ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO);                        \
  54        static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));             \
  55        static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));      \
  56        asmlinkage long __arm64_sys##name(const struct pt_regs *regs)           \
  57        {                                                                       \
  58                return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__));    \
  59        }                                                                       \
  60        static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))              \
  61        {                                                                       \
  62                long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));      \
  63                __MAP(x,__SC_TEST,__VA_ARGS__);                                 \
  64                __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__));               \
  65                return ret;                                                     \
  66        }                                                                       \
  67        static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
  68
  69#define SYSCALL_DEFINE0(sname)                                                  \
  70        SYSCALL_METADATA(_##sname, 0);                                          \
  71        asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused);    \
  72        ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO);                      \
  73        asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused)
  74
  75#define COND_SYSCALL(name)                                                      \
  76        asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
  77        {                                                                       \
  78                return sys_ni_syscall();                                        \
  79        }
  80
  81#define SYS_NI(name) SYSCALL_ALIAS(__arm64_sys_##name, sys_ni_posix_timers);
  82
  83#endif /* __ASM_SYSCALL_WRAPPER_H */
  84