arch/x86/entry/syscall_64.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* System call table for x86-64. */
   3
   4 #include <linux/linkage.h>
   5 #include <linux/sys.h>
   6 #include <linux/cache.h>
   7 #include <linux/syscalls.h>
   8 #include <asm/syscall.h>
   9
  10 #define __SYSCALL(nr, sym) extern long __x64_##sym(const struct pt_regs *);
  11 #define __SYSCALL_NORETURN(nr, sym) extern long __noreturn __x64_##sym(const struct pt_regs *);
  12 #include <asm/syscalls_64.h>
  13 #undef  __SYSCALL
  14
  15 #undef  __SYSCALL_NORETURN
  16 #define __SYSCALL_NORETURN __SYSCALL
  17
  18 /*
  19  * The sys_call_table[] is no longer used for system calls, but
  20  * kernel/trace/trace_syscalls.c still wants to know the system
  21  * call address.
  22  */
  23 #define __SYSCALL(nr, sym) __x64_##sym,
  24 const sys_call_ptr_t sys_call_table[] = {
  25 #include <asm/syscalls_64.h>
  26 };
  27 #undef  __SYSCALL
  28
  29 #define __SYSCALL(nr, sym) case nr: return __x64_##sym(regs);
  30 long x64_sys_call(const struct pt_regs *regs, unsigned int nr)
  31 {
  32         switch (nr) {
  33         #include <asm/syscalls_64.h>
  34         default: return __x64_sys_ni_syscall(regs);
  35         }
  36 };