root/arch/x86/um/sys_call_table_32.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * System call table for UML/i386, copied from arch/x86/kernel/syscall_*.c
   4  * with some changes for UML.
   5  */
   6 
   7 #include <linux/linkage.h>
   8 #include <linux/sys.h>
   9 #include <linux/cache.h>
  10 #include <generated/user_constants.h>
  11 #include <asm/syscall.h>
  12 
  13 #define __NO_STUBS
  14 
  15 /*
  16  * Below you can see, in terms of #define's, the differences between the x86-64
  17  * and the UML syscall table.
  18  */
  19 
  20 /* Not going to be implemented by UML, since we have no hardware. */
  21 #define sys_iopl sys_ni_syscall
  22 #define sys_ioperm sys_ni_syscall
  23 
  24 #define sys_vm86old sys_ni_syscall
  25 #define sys_vm86 sys_ni_syscall
  26 
  27 #define old_mmap sys_old_mmap
  28 
  29 #define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
  30 #include <asm/syscalls_32.h>
  31 
  32 #undef __SYSCALL_I386
  33 #define __SYSCALL_I386(nr, sym, qual) [ nr ] = sym,
  34 
  35 extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
  36 
  37 const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = {
  38         /*
  39          * Smells like a compiler bug -- it doesn't work
  40          * when the & below is removed.
  41          */
  42         [0 ... __NR_syscall_max] = &sys_ni_syscall,
  43 #include <asm/syscalls_32.h>
  44 };
  45 
  46 int syscall_table_size = sizeof(sys_call_table);