LXR linux/arch/x86/um/sys_call_table

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * System call table for UML/x86-64, 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/*
  25 * The UML TLS problem. Note that x86_64 does not implement this, so the below
  26 * is needed only for the ia32 compatibility.
  27 */
  28
  29/* On UML we call it this way ("old" means it's not mmap2) */
  30#define sys_mmap old_mmap
  31
  32#define stub_clone sys_clone
  33#define stub_fork sys_fork
  34#define stub_vfork sys_vfork
  35#define stub_execve sys_execve
  36#define stub_execveat sys_execveat
  37#define stub_rt_sigreturn sys_rt_sigreturn
  38
  39#define __SYSCALL_64(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
  40#include <asm/syscalls_64.h>
  41
  42#undef __SYSCALL_64
  43#define __SYSCALL_64(nr, sym, qual) [ nr ] = sym,
  44
  45extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
  46
  47const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = {
  48        /*
  49         * Smells like a compiler bug -- it doesn't work
  50         * when the & below is removed.
  51         */
  52        [0 ... __NR_syscall_max] = &sys_ni_syscall,
  53#include <asm/syscalls_64.h>
  54};
  55
  56int syscall_table_size = sizeof(sys_call_table);
  57