root/arch/x86/entry/syscall_32.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* System call table for i386. */
   3 
   4 #include <linux/linkage.h>
   5 #include <linux/sys.h>
   6 #include <linux/cache.h>
   7 #include <asm/asm-offsets.h>
   8 #include <asm/syscall.h>
   9 
  10 #ifdef CONFIG_IA32_EMULATION
  11 /* On X86_64, we use struct pt_regs * to pass parameters to syscalls */
  12 #define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *);
  13 #define __sys_ni_syscall __ia32_sys_ni_syscall
  14 #else /* CONFIG_IA32_EMULATION */
  15 #define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
  16 extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
  17 #define __sys_ni_syscall sys_ni_syscall
  18 #endif /* CONFIG_IA32_EMULATION */
  19 
  20 #include <asm/syscalls_32.h>
  21 #undef __SYSCALL_I386
  22 
  23 #define __SYSCALL_I386(nr, sym, qual) [nr] = sym,
  24 
  25 __visible const sys_call_ptr_t ia32_sys_call_table[__NR_syscall_compat_max+1] = {
  26         /*
  27          * Smells like a compiler bug -- it doesn't work
  28          * when the & below is removed.
  29          */
  30         [0 ... __NR_syscall_compat_max] = &__sys_ni_syscall,
  31 #include <asm/syscalls_32.h>
  32 };