arch/um/kernel/skas/syscall.c

   1 /*
   2  * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/ptrace.h>
   8 #include <kern_util.h>
   9 #include <sysdep/ptrace.h>
  10 #include <sysdep/syscalls.h>
  11 #include <os.h>
  12
  13 void handle_syscall(struct uml_pt_regs *r)
  14 {
  15         struct pt_regs *regs = container_of(r, struct pt_regs, regs);
  16         long result;
  17         int syscall;
  18
  19         if (syscall_trace_enter(regs)) {
  20                 result = -ENOSYS;
  21                 goto out;
  22         }
  23
  24         syscall = get_syscall(r);
  25
  26         if ((syscall > __NR_syscall_max) || syscall < 0)
  27                 result = -ENOSYS;
  28         else
  29                 result = EXECUTE_SYSCALL(syscall, regs);
  30
  31 out:
  32         PT_REGS_SET_SYSCALL_RETURN(regs, result);
  33
  34         syscall_trace_leave(regs);
  35 }