config/kernel-objtool.m4

   1 dnl #
   2 dnl # Check for objtool support.
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_SRC_OBJTOOL], [
   5
   6         dnl # 4.6 API for compile-time stack validation
   7         ZFS_LINUX_TEST_SRC([objtool], [
   8                 #undef __ASSEMBLY__
   9                 #include <asm/frame.h>
  10         ],[
  11                 #if !defined(FRAME_BEGIN)
  12                 CTASSERT(1);
  13                 #endif
  14         ])
  15
  16         dnl # 4.6 API added STACK_FRAME_NON_STANDARD macro
  17         ZFS_LINUX_TEST_SRC([stack_frame_non_standard], [
  18                 #include <linux/frame.h>
  19         ],[
  20                 #if !defined(STACK_FRAME_NON_STANDARD)
  21                 CTASSERT(1);
  22                 #endif
  23         ])
  24 ])
  25
  26 AC_DEFUN([ZFS_AC_KERNEL_OBJTOOL], [
  27         AC_MSG_CHECKING(
  28             [whether compile-time stack validation (objtool) is available])
  29         ZFS_LINUX_TEST_RESULT([objtool], [
  30                 AC_MSG_RESULT(yes)
  31                 AC_DEFINE(HAVE_KERNEL_OBJTOOL, 1,
  32                     [kernel does stack verification])
  33
  34                 AC_MSG_CHECKING([whether STACK_FRAME_NON_STANDARD is defined])
  35                 ZFS_LINUX_TEST_RESULT([stack_frame_non_standard], [
  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         ],[
  43                 AC_MSG_RESULT(no)
  44         ])
  45 ])