dnl Process this file with autoconf to produce a configure script.
AC_PREREQ(2.59)
AC_INIT([usbip-utils], [2.0], [linux-usb@vger.kernel.org])
AC_DEFINE([USBIP_VERSION], [0x00000111], [binary-coded decimal version number])
CURRENT=0
REVISION=1
AGE=0
AC_SUBST([LIBUSBIP_VERSION], [$CURRENT:$REVISION:$AGE], [library version])
AC_CONFIG_SRCDIR([src/usbipd.c])
AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE([foreign])
LT_INIT
# Silent build for automake >= 1.11
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AC_SUBST([EXTRA_CFLAGS], ["-Wall -Werror -Wextra -std=gnu99"])
# Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_MAKE_SET
# Checks for header files.
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h stdint.h stdlib.h dnl
string.h sys/socket.h syslog.h unistd.h])
# Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_INT32_T
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T
AC_TYPE_UINT16_T
AC_TYPE_UINT32_T
AC_TYPE_UINT8_T
# Checks for library functions.
AC_FUNC_REALLOC
AC_CHECK_FUNCS([memset mkdir regcomp socket strchr strerror strstr dnl
strtoul])
AC_CHECK_HEADER([libudev.h],
[AC_CHECK_LIB([udev], [udev_new],
[LIBS="$LIBS -ludev"],
[AC_MSG_ERROR([Missing udev library!])])],
[AC_MSG_ERROR([Missing /usr/include/libudev.h])])
# Checks for libwrap library.
AC_MSG_CHECKING([whether to use the libwrap (TCP wrappers) library])
AC_ARG_WITH([tcp-wrappers],
[AS_HELP_STRING([--with-tcp-wrappers],
[use the libwrap (TCP wrappers) library])],
dnl [ACTION-IF-GIVEN]
[if test "$withval" = "yes"; then
AC_MSG_RESULT([yes])
AC_MSG_CHECKING([for hosts_access in -lwrap])
saved_LIBS="$LIBS"
LIBS="-lwrap $saved_LIBS"
AC_TRY_LINK(
[int hosts_access(); int allow_severity, deny_severity;],
[hosts_access()],
[AC_MSG_RESULT([yes]);
AC_DEFINE([HAVE_LIBWRAP], [1],
[use tcp wrapper]) wrap_LIB="-lwrap"],
[AC_MSG_RESULT([not found]); exit 1])
else
AC_MSG_RESULT([no]);
fi],
dnl [ACTION-IF-NOT-GIVEN]
[AC_MSG_RESULT([(default)])
AC_MSG_CHECKING([for hosts_access in -lwrap])
saved_LIBS="$LIBS"
LIBS="-lwrap $saved_LIBS"
AC_TRY_LINK(
[int hosts_access(); int allow_severity, deny_severity;],
[hosts_access()],
[AC_MSG_RESULT([yes]);
AC_DEFINE([HAVE_LIBWRAP], [1], [use tcp wrapper])],
[AC_MSG_RESULT([no]); LIBS="$saved_LIBS"])])
# Sets directory containing usb.ids.
AC_ARG_WITH([usbids-dir],
[AS_HELP_STRING([--with-usbids-dir=DIR],
[where usb.ids is found (default /usr/share/hwdata/)])],
[USBIDS_DIR=$withval], [USBIDS_DIR="/usr/share/hwdata/"])
AC_SUBST([USBIDS_DIR])
# use _FORTIFY_SOURCE
AC_MSG_CHECKING([whether to use fortify])
AC_ARG_WITH([fortify],
[AS_HELP_STRING([--with-fortify],
[use _FORTIFY_SROUCE option when compiling)])],
dnl [ACTION-IF-GIVEN]
[if test "$withval" = "yes"; then
AC_MSG_RESULT([yes])
CFLAGS="$CFLAGS -D_FORTIFY_SOURCE -O"
else
AC_MSG_RESULT([no])
CFLAGS="$CFLAGS -U_FORTIFY_SOURCE"
fi
],
dnl [ACTION-IF-NOT-GIVEN]
[AC_MSG_RESULT([default])])
AC_CONFIG_FILES([Makefile libsrc/Makefile src/Makefile])
AC_OUTPUT
25e92'/>
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(),
after which unaligned accesses to RAM are no longer supported.
Commit:
abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")
fixed an issue in the memory map handling of the stub FDT code, but
inadvertently created an issue with such firmware, by moving some
of the FDT manipulation to after the invocation of ExitBootServices().
Given that the stub's libfdt implementation uses the ordinary, accelerated
string functions, which rely on hardware handling of unaligned accesses,
manipulating the FDT with the MMU off may result in alignment faults.
So fix the situation by moving the update_fdt_memmap() call into the
callback function invoked by efi_exit_boot_services() right before it
calls the ExitBootServices() UEFI service (which is arguably a better
place for it anyway)
Note that disabling the MMU in ExitBootServices() is not compliant with
the UEFI spec, and carries great risk due to the fact that switching from
cached to uncached memory accesses halfway through compiler generated code
(i.e., involving a stack) can never be done in a way that is architecturally
safe.
Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Riku Voipio <riku.voipio@linaro.org>
Cc: <stable@vger.kernel.org>
Cc: mark.rutland@arm.com
Cc: linux-efi@vger.kernel.org
Cc: matt@codeblueprint.co.uk
Cc: leif.lindholm@linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>