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
  14 /* this is a lie, but it does not hurt as sys_ni_syscall just returns -EINVAL */
  15 extern asmlinkage long sys_ni_syscall(const struct pt_regs *);
  16
  17 #else /* CONFIG_IA32_EMULATION */
  18 #define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
  19 extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
  20 #endif /* CONFIG_IA32_EMULATION */
  21
  22 #include <asm/syscalls_32.h>
  23 #undef __SYSCALL_I386
  24
  25 #define __SYSCALL_I386(nr, sym, qual) [nr] = sym,
  26
  27 __visible const sys_call_ptr_t ia32_sys_call_table[__NR_syscall_compat_max+1] = {
  28         /*
  29          * Smells like a compiler bug -- it doesn't work
  30          * when the & below is removed.
  31          */
  32         [0 ... __NR_syscall_compat_max] = &sys_ni_syscall,
  33 #include <asm/syscalls_32.h>
  34 };