arch/powerpc/include/asm/syscall_wrapper.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * syscall_wrapper.h - powerpc specific wrappers to syscall definitions
   4  *
   5  * Based on arch/{x86,arm64}/include/asm/syscall_wrapper.h
   6  */
   7
   8 #ifndef __ASM_POWERPC_SYSCALL_WRAPPER_H
   9 #define __ASM_POWERPC_SYSCALL_WRAPPER_H
  10
  11 struct pt_regs;
  12
  13 #define SC_POWERPC_REGS_TO_ARGS(x, ...)                         \
  14         __MAP(x,__SC_ARGS                                       \
  15               ,,regs->gpr[3],,regs->gpr[4],,regs->gpr[5]        \
  16               ,,regs->gpr[6],,regs->gpr[7],,regs->gpr[8])
  17
  18 #define __SYSCALL_DEFINEx(x, name, ...)                                         \
  19         long sys##name(const struct pt_regs *regs);                     \
  20         ALLOW_ERROR_INJECTION(sys##name, ERRNO);                        \
  21         static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));             \
  22         static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));      \
  23         long sys##name(const struct pt_regs *regs)                      \
  24         {                                                                       \
  25                 return __se_sys##name(SC_POWERPC_REGS_TO_ARGS(x,__VA_ARGS__));  \
  26         }                                                                       \
  27         static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))              \
  28         {                                                                       \
  29                 long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));      \
  30                 __MAP(x,__SC_TEST,__VA_ARGS__);                                 \
  31                 __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__));               \
  32                 return ret;                                                     \
  33         }                                                                       \
  34         static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
  35
  36 #define SYSCALL_DEFINE0(sname)                                                  \
  37         SYSCALL_METADATA(_##sname, 0);                                          \
  38         long sys_##sname(const struct pt_regs *__unused);               \
  39         ALLOW_ERROR_INJECTION(sys_##sname, ERRNO);                      \
  40         long sys_##sname(const struct pt_regs *__unused)
  41
  42 #define COND_SYSCALL(name)                                                      \
  43         long sys_##name(const struct pt_regs *regs);                    \
  44         long __weak sys_##name(const struct pt_regs *regs)              \
  45         {                                                                       \
  46                 return sys_ni_syscall();                                        \
  47         }
  48
  49 #endif // __ASM_POWERPC_SYSCALL_WRAPPER_H