arch/x86/um/sys_call_table_64.c

   1 /*
   2  * System call table for UML/x86-64, 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 #include <asm/syscall.h>
  11
  12 #define __NO_STUBS
  13
  14 /*
  15  * Below you can see, in terms of #define's, the differences between the x86-64
  16  * and the UML syscall table.
  17  */
  18
  19 /* Not going to be implemented by UML, since we have no hardware. */
  20 #define sys_iopl sys_ni_syscall
  21 #define sys_ioperm sys_ni_syscall
  22
  23 /*
  24  * The UML TLS problem. Note that x86_64 does not implement this, so the below
  25  * is needed only for the ia32 compatibility.
  26  */
  27
  28 /* On UML we call it this way ("old" means it's not mmap2) */
  29 #define sys_mmap old_mmap
  30
  31 #define stub_clone sys_clone
  32 #define stub_fork sys_fork
  33 #define stub_vfork sys_vfork
  34 #define stub_execve sys_execve
  35 #define stub_execveat sys_execveat
  36 #define stub_rt_sigreturn sys_rt_sigreturn
  37
  38 #define __SYSCALL_64(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
  39 #include <asm/syscalls_64.h>
  40
  41 #undef __SYSCALL_64
  42 #define __SYSCALL_64(nr, sym, qual) [ nr ] = sym,
  43
  44 extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
  45
  46 const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = {
  47         /*
  48          * Smells like a compiler bug -- it doesn't work
  49          * when the & below is removed.
  50          */
  51         [0 ... __NR_syscall_max] = &sys_ni_syscall,
  52 #include <asm/syscalls_64.h>
  53 };
  54
  55 int syscall_table_size = sizeof(sys_call_table);