config/kernel-objtool.m4

   1 dnl #
   2 dnl # 4.6 API for compile-time stack validation
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_OBJTOOL], [
   5         AC_MSG_CHECKING([for compile-time stack validation (objtool)])
   6         ZFS_LINUX_TRY_COMPILE([
   7                 #undef __ASSEMBLY__
   8                 #include <asm/frame.h>
   9         ],[
  10                 #if !defined(FRAME_BEGIN)
  11                 CTASSERT(1);
  12                 #endif
  13         ],[
  14                 AC_MSG_RESULT(yes)
  15                 AC_DEFINE(HAVE_KERNEL_OBJTOOL, 1,
  16                     [kernel does stack verification])
  17
  18                 ZFS_AC_KERNEL_STACK_FRAME_NON_STANDARD
  19         ],[
  20                 AC_MSG_RESULT(no)
  21         ])
  22 ])
  23
  24 dnl #
  25 dnl # 4.6 API added STACK_FRAME_NON_STANDARD macro
  26 dnl #
  27 AC_DEFUN([ZFS_AC_KERNEL_STACK_FRAME_NON_STANDARD], [
  28         AC_MSG_CHECKING([whether STACK_FRAME_NON_STANDARD is defined])
  29         ZFS_LINUX_TRY_COMPILE([
  30                 #include <linux/frame.h>
  31         ],[
  32                 #if !defined(STACK_FRAME_NON_STANDARD)
  33                 CTASSERT(1);
  34                 #endif
  35         ],[
  36                 AC_MSG_RESULT(yes)
  37                 AC_DEFINE(HAVE_STACK_FRAME_NON_STANDARD, 1,
  38                    [STACK_FRAME_NON_STANDARD is defined])
  39         ],[
  40                 AC_MSG_RESULT(no)
  41         ])
  42 ])