arch/x86/um/sys_call_table_32.c

   1 /*
   2  * System call table for UML/i386, copied from arch/x86/kernel/syscall_*.c
   3  * with some changes for UML.
   4  */
   5
   6 #include <linux/linkage.h>
   7 #include <linux/sys.h>
   8 #include <linux/cache.h>
   9 #include <generated/user_constants.h>
  10
  11 #define __NO_STUBS
  12
  13 /*
  14  * Below you can see, in terms of #define's, the differences between the x86-64
  15  * and the UML syscall table.
  16  */
  17
  18 /* Not going to be implemented by UML, since we have no hardware. */
  19 #define sys_iopl sys_ni_syscall
  20 #define sys_ioperm sys_ni_syscall
  21
  22 #define sys_vm86old sys_ni_syscall
  23 #define sys_vm86 sys_ni_syscall
  24
  25 #define old_mmap sys_old_mmap
  26
  27 #define ptregs_iopl sys_iopl
  28 #define ptregs_vm86old sys_vm86old
  29 #define ptregs_vm86 sys_vm86
  30
  31 #define __SYSCALL_I386(nr, sym, compat) extern asmlinkage void sym(void) ;
  32 #include <asm/syscalls_32.h>
  33
  34 #undef __SYSCALL_I386
  35 #define __SYSCALL_I386(nr, sym, compat) [ nr ] = sym,
  36
  37 typedef asmlinkage void (*sys_call_ptr_t)(void);
  38
  39 extern asmlinkage void sys_ni_syscall(void);
  40
  41 const sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
  42         /*
  43          * Smells like a compiler bug -- it doesn't work
  44          * when the & below is removed.
  45          */
  46         [0 ... __NR_syscall_max] = &sys_ni_syscall,
  47 #include <asm/syscalls_32.h>
  48 };
  49
  50 int syscall_table_size = sizeof(sys_call_table);