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Suppress incorrect objtool warnings

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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
This commit is contained in:
Brian Behlendorf 2017-12-07 10:28:50 -08:00 committed by GitHub
parent 674b89342e
commit c28a67733c
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 69 additions and 1 deletions
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25
config/kernel-objtool.m4
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@ -12,7 +12,30 @@ AC_DEFUN([ZFS_AC_KERNEL_OBJTOOL], [
#endif
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_OBJTOOL, 1, [kernel does stack verification])
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])
],[
AC_MSG_RESULT(no)
])

1
include/sys/Makefile.am
View File

@ -35,6 +35,7 @@ COMMON_H = \
$(top_srcdir)/include/sys/dsl_userhold.h \
$(top_srcdir)/include/sys/edonr.h \
$(top_srcdir)/include/sys/efi_partition.h \
$(top_srcdir)/include/sys/frame.h \
$(top_srcdir)/include/sys/hkdf.h \
$(top_srcdir)/include/sys/metaslab.h \
$(top_srcdir)/include/sys/metaslab_impl.h \

36
include/sys/frame.h Normal file
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@ -0,0 +1,36 @@
/*
* CDDL HEADER START
*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*
* CDDL HEADER END
*/
/*
* Copyright (C) 2017 by Lawrence Livermore National Security, LLC.
*/
#ifndef _SYS_FRAME_H
#define _SYS_FRAME_H
#ifdef __cplusplus
extern "C" {
#endif
#if defined(__KERNEL__) && defined(HAVE_STACK_FRAME_NON_STANDARD)
#include <linux/frame.h>
#else
#define STACK_FRAME_NON_STANDARD(func)
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_FRAME_H */

3
module/zcommon/zfs_fletcher_avx512.c
View File

@ -26,6 +26,7 @@
#include <linux/simd_x86.h>
#include <sys/byteorder.h>
#include <sys/frame.h>
#include <sys/spa_checksum.h>
#include <zfs_fletcher.h>
#include <strings.h>
@ -107,6 +108,7 @@ fletcher_4_avx512f_native(fletcher_4_ctx_t *ctx, const void *buf, uint64_t size)
kfpu_end();
}
STACK_FRAME_NON_STANDARD(fletcher_4_avx512f_native);
static void
fletcher_4_avx512f_byteswap(fletcher_4_ctx_t *ctx, const void *buf,
@ -150,6 +152,7 @@ fletcher_4_avx512f_byteswap(fletcher_4_ctx_t *ctx, const void *buf,
kfpu_end();
}
STACK_FRAME_NON_STANDARD(fletcher_4_avx512f_byteswap);
static boolean_t
fletcher_4_avx512f_valid(void)

5
module/zfs/Makefile.in
View File

@ -120,6 +120,11 @@ $(MODULE)-objs += dsl_destroy.o
$(MODULE)-objs += dsl_userhold.o
$(MODULE)-objs += qat_compress.o
# Suppress incorrect warnings from versions of objtool which are not
# aware of x86 EVEX prefix instructions used for AVX512.
OBJECT_FILES_NON_STANDARD_vdev_raidz_math_avx512bw.o := y
OBJECT_FILES_NON_STANDARD_vdev_raidz_math_avx512f.o := y
$(MODULE)-$(CONFIG_X86) += vdev_raidz_math_sse2.o
$(MODULE)-$(CONFIG_X86) += vdev_raidz_math_ssse3.o
$(MODULE)-$(CONFIG_X86) += vdev_raidz_math_avx2.o