mirror_zfs/config/kernel-objtool.m4
Brian Behlendorf 96951e0327
Fix objtool configure check
The m4 objtool configure check can incorrectly fail because of a
missing header in the test.  This appears to be the result of a
recent kernel change and was observed on the Fedora 5.8.11-200
kernel.

  In file included from /home/fedora/zfs/build/objtool/objtool.c:75:
  ./arch/x86/include/asm/frame.h💯57: error: 'struct pt_regs'
      declared inside parameter list will not be visible outside
      of this definition or declaration [-Werror]

The consequence of this is that the "stack_frame_non_standard"
check is never run and HAVE_STACK_FRAME_NON_STANDARD is set
incorrectly which results in a build failure.  This change adds
the appropriate header to the "objtool" check so it now behaves
as intended.

Reviewed-by: Kjeld Schouten <kjeld@schouten-lebbing.nl>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #10990
2020-09-28 16:40:50 -07:00

47 lines
1.1 KiB
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dnl #
dnl # Check for objtool support.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_OBJTOOL], [
dnl # 4.6 API for compile-time stack validation
ZFS_LINUX_TEST_SRC([objtool], [
#undef __ASSEMBLY__
#include <asm/ptrace.h>
#include <asm/frame.h>
],[
#if !defined(FRAME_BEGIN)
#error "FRAME_BEGIN is not defined"
#endif
])
dnl # 4.6 API added STACK_FRAME_NON_STANDARD macro
ZFS_LINUX_TEST_SRC([stack_frame_non_standard], [
#include <linux/frame.h>
],[
#if !defined(STACK_FRAME_NON_STANDARD)
#error "STACK_FRAME_NON_STANDARD is not defined."
#endif
])
])
AC_DEFUN([ZFS_AC_KERNEL_OBJTOOL], [
AC_MSG_CHECKING(
[whether compile-time stack validation (objtool) is available])
ZFS_LINUX_TEST_RESULT([objtool], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_OBJTOOL, 1,
[kernel does stack verification])
AC_MSG_CHECKING([whether STACK_FRAME_NON_STANDARD is defined])
ZFS_LINUX_TEST_RESULT([stack_frame_non_standard], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_STACK_FRAME_NON_STANDARD, 1,
[STACK_FRAME_NON_STANDARD is defined])
],[
AC_MSG_RESULT(no)
])
],[
AC_MSG_RESULT(no)
])
])