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zfs/config/kernel-objtool.m4

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[icp] fpu and asm cleanup for linux Properly annotate functions and data section so that objtool does not complain when CONFIG_STACK_VALIDATION and CONFIG_FRAME_POINTER are enabled. Pass KERNELCPPFLAGS to assembler. Use kfpu_begin()/kfpu_end() to protect SIMD regions in Linux kernel. Reviewed-by: Tom Caputi <tcaputi@datto.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Gvozden Neskovic <neskovic@gmail.com> Closes #5872 Closes #5041
2017-03-07 20:59:31 +00:00
dnl #
dnl # 4.6 API for compile-time stack validation
dnl #
AC_DEFUN([ZFS_AC_KERNEL_OBJTOOL], [
AC_MSG_CHECKING([for compile-time stack validation (objtool)])
ZFS_LINUX_TRY_COMPILE([
#undef __ASSEMBLY__
#include <asm/frame.h>
],[
#if !defined(FRAME_BEGIN)
CTASSERT(1);
#endif
],[
AC_MSG_RESULT(yes)
Suppress incorrect objtool warnings Suppress incorrect warnings from versions of objtool which are not aware of x86 EVEX prefix instructions used for AVX512. module/zfs/vdev_raidz_math_avx512bw.o: warning: objtool: <func+offset>: can't find jump dest instruction at .text Reviewed-by: Don Brady <don.brady@delphix.com> Reviewed-by: George Melikov <mail@gmelikov.ru> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #6928
2017-12-07 18:28:50 +00:00
AC_DEFINE(HAVE_KERNEL_OBJTOOL, 1,
[kernel does stack verification])
ZFS_AC_KERNEL_STACK_FRAME_NON_STANDARD
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.6 API added STACK_FRAME_NON_STANDARD macro
dnl #
AC_DEFUN([ZFS_AC_KERNEL_STACK_FRAME_NON_STANDARD], [
AC_MSG_CHECKING([whether STACK_FRAME_NON_STANDARD is defined])
ZFS_LINUX_TRY_COMPILE([
#include <linux/frame.h>
],[
#if !defined(STACK_FRAME_NON_STANDARD)
CTASSERT(1);
#endif
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_STACK_FRAME_NON_STANDARD, 1,
[STACK_FRAME_NON_STANDARD is defined])
[icp] fpu and asm cleanup for linux Properly annotate functions and data section so that objtool does not complain when CONFIG_STACK_VALIDATION and CONFIG_FRAME_POINTER are enabled. Pass KERNELCPPFLAGS to assembler. Use kfpu_begin()/kfpu_end() to protect SIMD regions in Linux kernel. Reviewed-by: Tom Caputi <tcaputi@datto.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Gvozden Neskovic <neskovic@gmail.com> Closes #5872 Closes #5041
2017-03-07 20:59:31 +00:00
],[
AC_MSG_RESULT(no)
])
])