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Kbuild updates for v5.8

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- fix warnings in 'make clean' for ARCH=um, hexagon, h8300, unicore32
 
  - ensure to rebuild all objects when the compiler is upgraded
 
  - exclude system headers from dependency tracking and fixdep processing
 
  - fix potential bit-size mismatch between the kernel and BPF user-mode
    helper
 
  - add the new syntax 'userprogs' to build user-space programs for the
    target architecture (the same arch as the kernel)
 
  - compile user-space sample code under samples/ for the target arch
    instead of the host arch
 
  - make headers_install fail if a CONFIG option is leaked to user-space
 
  - sanitize the output format of scripts/checkstack.pl
 
  - handle ARM 'push' instruction in scripts/checkstack.pl
 
  - error out before modpost if a module name conflict is found
 
  - error out when multiple directories are passed to M= because this
    feature is broken for a long time
 
  - add CONFIG_DEBUG_INFO_COMPRESSED to support compressed debug info
 
  - a lot of cleanups of modpost
 
  - dump vmlinux symbols out into vmlinux.symvers, and reuse it in the
    second pass of modpost
 
  - do not run the second pass of modpost if nothing in modules is updated
 
  - install modules.builtin(.modinfo) by 'make install' as well as by
    'make modules_install' because it is useful even when CONFIG_MODULES=n
 
  - add new command line variables, GZIP, BZIP2, LZOP, LZMA, LZ4, and XZ
    to allow users to use alternatives such as pigz, pbzip2, etc.
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Merge tag 'kbuild-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - fix warnings in 'make clean' for ARCH=um, hexagon, h8300, unicore32

 - ensure to rebuild all objects when the compiler is upgraded

 - exclude system headers from dependency tracking and fixdep processing

 - fix potential bit-size mismatch between the kernel and BPF user-mode
   helper

 - add the new syntax 'userprogs' to build user-space programs for the
   target architecture (the same arch as the kernel)

 - compile user-space sample code under samples/ for the target arch
   instead of the host arch

 - make headers_install fail if a CONFIG option is leaked to user-space

 - sanitize the output format of scripts/checkstack.pl

 - handle ARM 'push' instruction in scripts/checkstack.pl

 - error out before modpost if a module name conflict is found

 - error out when multiple directories are passed to M= because this
   feature is broken for a long time

 - add CONFIG_DEBUG_INFO_COMPRESSED to support compressed debug info

 - a lot of cleanups of modpost

 - dump vmlinux symbols out into vmlinux.symvers, and reuse it in the
   second pass of modpost

 - do not run the second pass of modpost if nothing in modules is
   updated

 - install modules.builtin(.modinfo) by 'make install' as well as by
   'make modules_install' because it is useful even when
   CONFIG_MODULES=n

 - add new command line variables, GZIP, BZIP2, LZOP, LZMA, LZ4, and XZ
   to allow users to use alternatives such as pigz, pbzip2, etc.

* tag 'kbuild-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (96 commits)
  kbuild: add variables for compression tools
  Makefile: install modules.builtin even if CONFIG_MODULES=n
  mksysmap: Fix the mismatch of '.L' symbols in System.map
  kbuild: doc: rename LDFLAGS to KBUILD_LDFLAGS
  modpost: change elf_info->size to size_t
  modpost: remove is_vmlinux() helper
  modpost: strip .o from modname before calling new_module()
  modpost: set have_vmlinux in new_module()
  modpost: remove mod->skip struct member
  modpost: add mod->is_vmlinux struct member
  modpost: remove is_vmlinux() call in check_for_{gpl_usage,unused}()
  modpost: remove mod->is_dot_o struct member
  modpost: move -d option in scripts/Makefile.modpost
  modpost: remove -s option
  modpost: remove get_next_text() and make {grab,release_}file static
  modpost: use read_text_file() and get_line() for reading text files
  modpost: avoid false-positive file open error
  modpost: fix potential mmap'ed file overrun in get_src_version()
  modpost: add read_text_file() and get_line() helpers
  modpost: do not call get_modinfo() for vmlinux(.o)
  ...
This commit is contained in:
Linus Torvalds 2020-06-06 12:00:25 -07:00
commit cff11abeca
60 changed files with 883 additions and 757 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.gitignore vendored
View File

@ -56,6 +56,7 @@ modules.order
/linux
/vmlinux
/vmlinux.32
/vmlinux.symvers
/vmlinux-gdb.py
/vmlinuz
/System.map

1
Documentation/dontdiff
View File

@ -251,6 +251,7 @@ vmlinux-*
vmlinux.aout
vmlinux.bin.all
vmlinux.lds
vmlinux.symvers
vmlinuz
voffset.h
vsyscall.lds

181
Documentation/kbuild/makefiles.rst
View File

@ -29,31 +29,37 @@ This document describes the Linux kernel Makefiles.
--- 4.4 Controlling compiler options for host programs
--- 4.5 When host programs are actually built
=== 5 Kbuild clean infrastructure
=== 5 Userspace Program support
--- 5.1 Simple Userspace Program
--- 5.2 Composite Userspace Programs
--- 5.3 Controlling compiler options for userspace programs
--- 5.4 When userspace programs are actually built
=== 6 Architecture Makefiles
--- 6.1 Set variables to tweak the build to the architecture
--- 6.2 Add prerequisites to archheaders:
--- 6.3 Add prerequisites to archprepare:
--- 6.4 List directories to visit when descending
--- 6.5 Architecture-specific boot images
--- 6.6 Building non-kbuild targets
--- 6.7 Commands useful for building a boot image
--- 6.8 Custom kbuild commands
--- 6.9 Preprocessing linker scripts
--- 6.10 Generic header files
--- 6.11 Post-link pass
=== 6 Kbuild clean infrastructure
=== 7 Kbuild syntax for exported headers
--- 7.1 no-export-headers
--- 7.2 generic-y
--- 7.3 generated-y
--- 7.4 mandatory-y
=== 7 Architecture Makefiles
--- 7.1 Set variables to tweak the build to the architecture
--- 7.2 Add prerequisites to archheaders:
--- 7.3 Add prerequisites to archprepare:
--- 7.4 List directories to visit when descending
--- 7.5 Architecture-specific boot images
--- 7.6 Building non-kbuild targets
--- 7.7 Commands useful for building a boot image
--- 7.8 Custom kbuild commands
--- 7.9 Preprocessing linker scripts
--- 7.10 Generic header files
--- 7.11 Post-link pass
=== 8 Kbuild Variables
=== 9 Makefile language
=== 10 Credits
=== 11 TODO
=== 8 Kbuild syntax for exported headers
--- 8.1 no-export-headers
--- 8.2 generic-y
--- 8.3 generated-y
--- 8.4 mandatory-y
=== 9 Kbuild Variables
=== 10 Makefile language
=== 11 Credits
=== 12 TODO
1 Overview
==========
@ -732,7 +738,88 @@ Both possibilities are described in the following.
This will tell kbuild to build lxdialog even if not referenced in
any rule.
5 Kbuild clean infrastructure
5 Userspace Program support
===========================
Just like host programs, Kbuild also supports building userspace executables
for the target architecture (i.e. the same architecture as you are building
the kernel for).
The syntax is quite similar. The difference is to use "userprogs" instead of
"hostprogs".
5.1 Simple Userspace Program
----------------------------
The following line tells kbuild that the program bpf-direct shall be
built for the target architecture.
Example::
userprogs := bpf-direct
Kbuild assumes in the above example that bpf-direct is made from a
single C source file named bpf-direct.c located in the same directory
as the Makefile.
5.2 Composite Userspace Programs
--------------------------------
Userspace programs can be made up based on composite objects.
The syntax used to define composite objects for userspace programs is
similar to the syntax used for kernel objects.
$(<executable>-objs) lists all objects used to link the final
executable.
Example::
#samples/seccomp/Makefile
userprogs := bpf-fancy
bpf-fancy-objs := bpf-fancy.o bpf-helper.o
Objects with extension .o are compiled from the corresponding .c
files. In the above example, bpf-fancy.c is compiled to bpf-fancy.o
and bpf-helper.c is compiled to bpf-helper.o.
Finally, the two .o files are linked to the executable, bpf-fancy.
Note: The syntax <executable>-y is not permitted for userspace programs.
5.3 Controlling compiler options for userspace programs
-------------------------------------------------------
When compiling userspace programs, it is possible to set specific flags.
The programs will always be compiled utilising $(CC) passed
the options specified in $(KBUILD_USERCFLAGS).
To set flags that will take effect for all userspace programs created
in that Makefile, use the variable userccflags.
Example::
# samples/seccomp/Makefile
userccflags += -I usr/include
To set specific flags for a single file the following construction
is used:
Example::
bpf-helper-userccflags += -I user/include
It is also possible to specify additional options to the linker.
Example::
# net/bpfilter/Makefile
bpfilter_umh-userldflags += -static
When linking bpfilter_umh, it will be passed the extra option -static.
5.4 When userspace programs are actually built
----------------------------------------------
Same as "When host programs are actually built".
6 Kbuild clean infrastructure
=============================
"make clean" deletes most generated files in the obj tree where the kernel
@ -790,7 +877,7 @@ is not operational at that point.
Note 2: All directories listed in core-y, libs-y, drivers-y and net-y will
be visited during "make clean".
6 Architecture Makefiles
7 Architecture Makefiles
========================
The top level Makefile sets up the environment and does the preparation,
@ -820,10 +907,10 @@ When kbuild executes, the following steps are followed (roughly):
- Preparing initrd images and the like
6.1 Set variables to tweak the build to the architecture
7.1 Set variables to tweak the build to the architecture
--------------------------------------------------------
LDFLAGS
KBUILD_LDFLAGS
Generic $(LD) options
Flags used for all invocations of the linker.
@ -832,7 +919,7 @@ When kbuild executes, the following steps are followed (roughly):
Example::
#arch/s390/Makefile
LDFLAGS := -m elf_s390
KBUILD_LDFLAGS := -m elf_s390
Note: ldflags-y can be used to further customise
the flags used. See chapter 3.7.
@ -967,7 +1054,7 @@ When kbuild executes, the following steps are followed (roughly):
KBUILD_VMLINUX_LIBS together specify all the object files used to
link vmlinux.
6.2 Add prerequisites to archheaders
7.2 Add prerequisites to archheaders
------------------------------------
The archheaders: rule is used to generate header files that
@ -977,7 +1064,7 @@ When kbuild executes, the following steps are followed (roughly):
architecture itself.
6.3 Add prerequisites to archprepare
7.3 Add prerequisites to archprepare
------------------------------------
The archprepare: rule is used to list prerequisites that need to be
@ -995,7 +1082,7 @@ When kbuild executes, the following steps are followed (roughly):
generating offset header files.
6.4 List directories to visit when descending
7.4 List directories to visit when descending
---------------------------------------------
An arch Makefile cooperates with the top Makefile to define variables
@ -1030,7 +1117,7 @@ When kbuild executes, the following steps are followed (roughly):
drivers-$(CONFIG_OPROFILE) += arch/sparc64/oprofile/
6.5 Architecture-specific boot images
7.5 Architecture-specific boot images
-------------------------------------
An arch Makefile specifies goals that take the vmlinux file, compress
@ -1085,7 +1172,7 @@ When kbuild executes, the following steps are followed (roughly):
When "make" is executed without arguments, bzImage will be built.
6.6 Building non-kbuild targets
7.6 Building non-kbuild targets
-------------------------------
extra-y
@ -1108,7 +1195,7 @@ When kbuild executes, the following steps are followed (roughly):
In this example, extra-y is used to list object files that
shall be built, but shall not be linked as part of built-in.a.
6.7 Commands useful for building a boot image
7.7 Commands useful for building a boot image
---------------------------------------------
Kbuild provides a few macros that are useful when building a
@ -1211,7 +1298,7 @@ When kbuild executes, the following steps are followed (roughly):
targets += $(dtb-y)
DTC_FLAGS ?= -p 1024
6.8 Custom kbuild commands
7.8 Custom kbuild commands
--------------------------
When kbuild is executing with KBUILD_VERBOSE=0, then only a shorthand
@ -1241,7 +1328,7 @@ When kbuild executes, the following steps are followed (roughly):
will be displayed with "make KBUILD_VERBOSE=0".
6.9 Preprocessing linker scripts
7.9 Preprocessing linker scripts
--------------------------------
When the vmlinux image is built, the linker script
@ -1274,7 +1361,7 @@ When kbuild executes, the following steps are followed (roughly):
The kbuild infrastructure for `*lds` files is used in several
architecture-specific files.
6.10 Generic header files
7.10 Generic header files
-------------------------
The directory include/asm-generic contains the header files
@ -1283,7 +1370,7 @@ When kbuild executes, the following steps are followed (roughly):
to list the file in the Kbuild file.
See "7.2 generic-y" for further info on syntax etc.
6.11 Post-link pass
7.11 Post-link pass
-------------------
If the file arch/xxx/Makefile.postlink exists, this makefile
@ -1299,7 +1386,7 @@ When kbuild executes, the following steps are followed (roughly):
For example, powerpc uses this to check relocation sanity of
the linked vmlinux file.
7 Kbuild syntax for exported headers
8 Kbuild syntax for exported headers
------------------------------------
The kernel includes a set of headers that is exported to userspace.
@ -1319,14 +1406,14 @@ A Kbuild file may be defined under arch/<arch>/include/uapi/asm/ and
arch/<arch>/include/asm/ to list asm files coming from asm-generic.
See subsequent chapter for the syntax of the Kbuild file.
7.1 no-export-headers
8.1 no-export-headers
---------------------
no-export-headers is essentially used by include/uapi/linux/Kbuild to
avoid exporting specific headers (e.g. kvm.h) on architectures that do
not support it. It should be avoided as much as possible.
7.2 generic-y
8.2 generic-y
-------------
If an architecture uses a verbatim copy of a header from
@ -1356,7 +1443,7 @@ See subsequent chapter for the syntax of the Kbuild file.
#include <asm-generic/termios.h>
7.3 generated-y
8.3 generated-y
---------------
If an architecture generates other header files alongside generic-y
@ -1370,7 +1457,7 @@ See subsequent chapter for the syntax of the Kbuild file.
#arch/x86/include/asm/Kbuild
generated-y += syscalls_32.h
7.4 mandatory-y
8.4 mandatory-y
---------------
mandatory-y is essentially used by include/(uapi/)asm-generic/Kbuild
@ -1380,7 +1467,7 @@ See subsequent chapter for the syntax of the Kbuild file.
in arch/$(ARCH)/include/(uapi/)/asm, Kbuild will automatically generate
a wrapper of the asm-generic one.
8 Kbuild Variables
9 Kbuild Variables
==================
The top Makefile exports the following variables:
@ -1438,8 +1525,8 @@ The top Makefile exports the following variables:
command.
9 Makefile language
===================
10 Makefile language
====================
The kernel Makefiles are designed to be run with GNU Make. The Makefiles
use only the documented features of GNU Make, but they do use many
@ -1458,7 +1545,7 @@ time the left-hand side is used.
There are some cases where "=" is appropriate. Usually, though, ":="
is the right choice.
10 Credits
11 Credits
==========
- Original version made by Michael Elizabeth Chastain, <mailto:mec@shout.net>
@ -1466,7 +1553,7 @@ is the right choice.
- Updates by Sam Ravnborg <sam@ravnborg.org>
- Language QA by Jan Engelhardt <jengelh@gmx.de>
11 TODO
12 TODO
=======
- Describe how kbuild supports shipped files with _shipped.

12
Documentation/kbuild/modules.rst
View File

@ -528,18 +528,6 @@ build.
will then do the expected and compile both modules with
full knowledge of symbols from either module.
Use an extra Module.symvers file
When an external module is built, a Module.symvers file
is generated containing all exported symbols which are
not defined in the kernel. To get access to symbols
from bar.ko, copy the Module.symvers file from the
compilation of bar.ko to the directory where foo.ko is
built. During the module build, kbuild will read the
Module.symvers file in the directory of the external
module, and when the build is finished, a new
Module.symvers file is created containing the sum of
all symbols defined and not part of the kernel.
Use "make" variable KBUILD_EXTRA_SYMBOLS
If it is impractical to add a top-level kbuild file,
you can assign a space separated list

2
Kconfig
View File

@ -5,8 +5,6 @@
#
mainmenu "Linux/$(ARCH) $(KERNELVERSION) Kernel Configuration"
comment "Compiler: $(CC_VERSION_TEXT)"
source "scripts/Kconfig.include"
source "init/Kconfig"

223
Makefile
View File

@ -11,9 +11,12 @@ NAME = Kleptomaniac Octopus
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.
$(if $(filter __%, $(MAKECMDGOALS)), \
$(error targets prefixed with '__' are only for internal use))
# That's our default target when none is given on the command line
PHONY := _all
_all:
PHONY := __all
__all:
# We are using a recursive build, so we need to do a little thinking
# to get the ordering right.
@ -157,12 +160,14 @@ MAKEFLAGS += --include-dir=$(abs_srctree)
need-sub-make := 1
endif
this-makefile := $(lastword $(MAKEFILE_LIST))
ifneq ($(filter 3.%,$(MAKE_VERSION)),)
# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
# We need to invoke sub-make to avoid implicit rules in the top Makefile.
need-sub-make := 1
# Cancel implicit rules for this Makefile.
$(lastword $(MAKEFILE_LIST)): ;
$(this-makefile): ;
endif
export abs_srctree abs_objtree
@ -170,13 +175,13 @@ export sub_make_done := 1
ifeq ($(need-sub-make),1)
PHONY += $(MAKECMDGOALS) sub-make
PHONY += $(MAKECMDGOALS) __sub-make
$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
@:
# Invoke a second make in the output directory, passing relevant variables
sub-make:
__sub-make:
$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
endif # need-sub-make
@ -213,6 +218,9 @@ ifeq ("$(origin M)", "command line")
KBUILD_EXTMOD := $(M)
endif
$(if $(word 2, $(KBUILD_EXTMOD)), \
$(error building multiple external modules is not supported))
export KBUILD_CHECKSRC KBUILD_EXTMOD
extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
@ -321,7 +329,7 @@ ifdef mixed-build
PHONY += $(MAKECMDGOALS) __build_one_by_one
$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
$(MAKECMDGOALS): __build_one_by_one
@:
__build_one_by_one:
@ -406,9 +414,12 @@ else
HOSTCC = gcc
HOSTCXX = g++
endif
KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
$(HOSTCFLAGS)
export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
-O2 -fomit-frame-pointer -std=gnu89
export KBUILD_USERLDFLAGS :=
KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
@ -447,6 +458,26 @@ PYTHON = python
PYTHON3 = python3
CHECK = sparse
BASH = bash
GZIP = gzip
BZIP2 = bzip2
LZOP = lzop
LZMA = lzma
LZ4 = lz4c
XZ = xz
# GZIP, BZIP2, LZOP env vars are used by the tools. Support them as the command
# line interface, but use _GZIP, _BZIP2, _LZOP internally.
_GZIP := $(GZIP)
_BZIP2 := $(BZIP2)
_LZOP := $(LZOP)
# Reset GZIP, BZIP2, LZOP in this Makefile
override GZIP=
override BZIP2=
override LZOP=
# Reset GZIP, BZIP2, LZOP in recursive invocations
MAKEOVERRIDES += GZIP= BZIP2= LZOP=
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
@ -495,6 +526,7 @@ CLANG_FLAGS :=
export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
export _GZIP _BZIP2 _LZOP LZMA LZ4 XZ
export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
@ -593,12 +625,12 @@ else #!config-build
# targets and others. In general all targets except *config targets.
# If building an external module we do not care about the all: rule
# but instead _all depend on modules
# but instead __all depend on modules
PHONY += all
ifeq ($(KBUILD_EXTMOD),)
_all: all
__all: all
else
_all: modules
__all: modules
endif
# Decide whether to build built-in, modular, or both.
@ -608,19 +640,15 @@ KBUILD_MODULES :=
KBUILD_BUILTIN := 1
# If we have only "make modules", don't compile built-in objects.
# When we're building modules with modversions, we need to consider
# the built-in objects during the descend as well, in order to
# make sure the checksums are up to date before we record them.
ifeq ($(MAKECMDGOALS),modules)
KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
KBUILD_BUILTIN :=
endif
# If we have "make <whatever> modules", compile modules
# in addition to whatever we do anyway.
# Just "make" or "make all" shall build modules as well
ifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
ifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),)
KBUILD_MODULES := 1
endif
@ -636,13 +664,11 @@ endif
ifeq ($(KBUILD_EXTMOD),)
# Objects we will link into vmlinux / subdirs we need to visit
init-y := init/
core-y := init/ usr/
drivers-y := drivers/ sound/
drivers-$(CONFIG_SAMPLES) += samples/
net-y := net/
drivers-y += net/ virt/
libs-y := lib/
core-y := usr/
virt-y := virt/
endif # KBUILD_EXTMOD
# The all: target is the default when no target is given on the
@ -695,7 +721,7 @@ $(KCONFIG_CONFIG):
# This exploits the 'multi-target pattern rule' trick.
# The syncconfig should be executed only once to make all the targets.
# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
%/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG)
%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
else # !may-sync-config
# External modules and some install targets need include/generated/autoconf.h
@ -814,6 +840,12 @@ DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
$(call cc-option,-fno-var-tracking)
endif
ifdef CONFIG_DEBUG_INFO_COMPRESSED
DEBUG_CFLAGS += -gz=zlib
KBUILD_AFLAGS += -Wa,--compress-debug-sections=zlib
KBUILD_LDFLAGS += --compress-debug-sections=zlib
endif
KBUILD_CFLAGS += $(DEBUG_CFLAGS)
export DEBUG_CFLAGS
@ -950,6 +982,10 @@ ifeq ($(CONFIG_RELR),y)
LDFLAGS_vmlinux += --pack-dyn-relocs=relr
endif
# Align the bit size of userspace programs with the kernel
KBUILD_USERCFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS))
KBUILD_USERLDFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS))
# make the checker run with the right architecture
CHECKFLAGS += --arch=$(ARCH)
@ -1011,10 +1047,10 @@ export mod_strip_cmd
mod_compress_cmd = true
ifdef CONFIG_MODULE_COMPRESS
ifdef CONFIG_MODULE_COMPRESS_GZIP
mod_compress_cmd = gzip -n -f
mod_compress_cmd = $(_GZIP) -n -f
endif # CONFIG_MODULE_COMPRESS_GZIP
ifdef CONFIG_MODULE_COMPRESS_XZ
mod_compress_cmd = xz -f
mod_compress_cmd = $(XZ) -f
endif # CONFIG_MODULE_COMPRESS_XZ
endif # CONFIG_MODULE_COMPRESS
export mod_compress_cmd
@ -1049,34 +1085,33 @@ export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
ifeq ($(KBUILD_EXTMOD),)
core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
$(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
$(libs-y) $(libs-m)))
vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
$(patsubst %/,%,$(filter %/, $(init-) $(core-) \
$(drivers-) $(net-) $(libs-) $(virt-))))
$(patsubst %/,%,$(filter %/, $(core-) \
$(drivers-) $(libs-))))
subdir-modorder := $(addsuffix modules.order,$(filter %/, \
$(core-y) $(core-m) $(libs-y) $(libs-m) \
$(drivers-y) $(drivers-m)))
build-dirs := $(vmlinux-dirs)
clean-dirs := $(vmlinux-alldirs)
init-y := $(patsubst %/, %/built-in.a, $(init-y))
core-y := $(patsubst %/, %/built-in.a, $(core-y))
drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y))
net-y := $(patsubst %/, %/built-in.a, $(net-y))
libs-y2 := $(patsubst %/, %/built-in.a, $(filter %/, $(libs-y)))
ifdef CONFIG_MODULES
libs-y1 := $(filter-out %/, $(libs-y))
libs-y2 += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
else
libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
endif
virt-y := $(patsubst %/, %/built-in.a, $(virt-y))
# Externally visible symbols (used by link-vmlinux.sh)
export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
$(drivers-y) $(net-y) $(virt-y)
export KBUILD_VMLINUX_LIBS := $(libs-y1)
KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
ifdef CONFIG_MODULES
KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
else
KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
endif
KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
export LDFLAGS_vmlinux
# used by scripts/Makefile.package
@ -1087,16 +1122,14 @@ vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
# Recurse until adjust_autoksyms.sh is satisfied
PHONY += autoksyms_recursive
ifdef CONFIG_TRIM_UNUSED_KSYMS
autoksyms_recursive: descend modules.order
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
"$(MAKE) -f $(srctree)/Makefile vmlinux"
endif
# For the kernel to actually contain only the needed exported symbols,
# we have to build modules as well to determine what those symbols are.
# (this can be evaluated only once include/config/auto.conf has been included)
ifdef CONFIG_TRIM_UNUSED_KSYMS
KBUILD_MODULES := 1
KBUILD_MODULES := 1
autoksyms_recursive: descend modules.order
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
"$(MAKE) -f $(srctree)/Makefile vmlinux"
endif
autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
@ -1122,7 +1155,7 @@ targets := vmlinux
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
$(sort $(vmlinux-deps)): descend ;
$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
filechk_kernel.release = \
echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
@ -1147,7 +1180,8 @@ scripts: scripts_basic scripts_dtc
PHONY += prepare archprepare
archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
include/generated/autoconf.h
prepare0: archprepare
$(Q)$(MAKE) $(build)=scripts/mod
@ -1315,12 +1349,29 @@ dt_binding_check: scripts_dtc
# ---------------------------------------------------------------------------
# Modules
# install modules.builtin regardless of CONFIG_MODULES
PHONY += _builtin_inst_
_builtin_inst_:
@mkdir -p $(MODLIB)/
@cp -f modules.builtin $(MODLIB)/
@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
PHONY += install
install: _builtin_inst_
ifdef CONFIG_MODULES
# By default, build modules as well
all: modules
# When we're building modules with modversions, we need to consider
# the built-in objects during the descend as well, in order to
# make sure the checksums are up to date before we record them.
ifdef CONFIG_MODVERSIONS
KBUILD_BUILTIN := 1
endif
# Build modules
#
# A module can be listed more than once in obj-m resulting in
@ -1328,12 +1379,19 @@ all: modules
# using awk while concatenating to the final file.
PHONY += modules
modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order
modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
modules.order: descend
$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
PHONY += modules_check
modules_check: modules.order
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
modules.order: $(subdir-modorder) FORCE
$(call if_changed,modules_order)
targets += modules.order
# Target to prepare building external modules
PHONY += modules_prepare
@ -1344,7 +1402,7 @@ PHONY += modules_install
modules_install: _modinst_ _modinst_post
PHONY += _modinst_
_modinst_:
_modinst_: _builtin_inst_
@rm -rf $(MODLIB)/kernel
@rm -f $(MODLIB)/source
@mkdir -p $(MODLIB)/kernel
@ -1354,8 +1412,6 @@ _modinst_:
ln -s $(CURDIR) $(MODLIB)/build ; \
fi
@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
@cp -f modules.builtin $(MODLIB)/
@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
# This depmod is only for convenience to give the initial
@ -1395,14 +1451,14 @@ endif # CONFIG_MODULES
# make distclean Remove editor backup files, patch leftover files and the like
# Directories & files removed with 'make clean'
CLEAN_DIRS += include/ksym
CLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps
CLEAN_FILES += include/ksym vmlinux.symvers \
modules.builtin modules.builtin.modinfo modules.nsdeps
# Directories & files removed with 'make mrproper'
MRPROPER_DIRS += include/config include/generated \
MRPROPER_FILES += include/config include/generated \
arch/$(SRCARCH)/include/generated .tmp_objdiff \
debian/ snap/ tar-install/
MRPROPER_FILES += .config .config.old .version \
debian snap tar-install \
.config .config.old .version \
Module.symvers \
signing_key.pem signing_key.priv signing_key.x509 \
x509.genkey extra_certificates signing_key.x509.keyid \
@ -1410,12 +1466,10 @@ MRPROPER_FILES += .config .config.old .version \
*.spec
# Directories & files removed with 'make distclean'
DISTCLEAN_DIRS +=
DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
PHONY += archclean vmlinuxclean
@ -1428,7 +1482,6 @@ clean: archclean vmlinuxclean
# mrproper - Delete all generated files, including .config
#
mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
mrproper-dirs := $(addprefix _mrproper_,scripts)
@ -1437,18 +1490,15 @@ $(mrproper-dirs):
$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
mrproper: clean $(mrproper-dirs)
$(call cmd,rmdirs)
$(call cmd,rmfiles)
# distclean
#
distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS))
distclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
PHONY += distclean
distclean: mrproper
$(call cmd,rmdirs)
$(call cmd,rmfiles)
@find $(srctree) $(RCS_FIND_IGNORE) \
\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
@ -1634,17 +1684,9 @@ else # KBUILD_EXTMOD
# We are always building modules
KBUILD_MODULES := 1
PHONY += $(objtree)/Module.symvers
$(objtree)/Module.symvers:
@test -e $(objtree)/Module.symvers || ( \
echo; \
echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
echo " is missing; modules will have no dependencies and modversions."; \
echo )
build-dirs := $(KBUILD_EXTMOD)
PHONY += modules
modules: descend $(objtree)/Module.symvers
modules: descend
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
PHONY += modules_install
@ -1663,10 +1705,6 @@ _emodinst_post: _emodinst_
clean-dirs := $(KBUILD_EXTMOD)
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
PHONY += /
/:
@echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
PHONY += help
help:
@echo ' Building external modules.'
@ -1724,6 +1762,10 @@ build-dirs := $(foreach d, $(build-dirs), \
endif
ifndef CONFIG_MODULES
KBUILD_MODULES :=
endif
# Handle descending into subdirectories listed in $(build-dirs)
# Preset locale variables to speed up the build process. Limit locale
# tweaks to this spot to avoid wrong language settings when running
@ -1742,7 +1784,6 @@ $(clean-dirs):
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
clean: $(clean-dirs)
$(call cmd,rmdirs)
$(call cmd,rmfiles)
@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
@ -1837,14 +1878,8 @@ tools/%: FORCE
$(Q)mkdir -p $(objtree)/tools
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
# FIXME Should go into a make.lib or something
# ===========================================================================
quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
cmd_rmdirs = rm -rf $(rm-dirs)
quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
cmd_rmfiles = rm -f $(rm-files)
cmd_rmfiles = rm -rf $(rm-files)
# Run depmod only if we have System.map and depmod is executable
quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)

2
arch/arm/Makefile
View File

@ -45,12 +45,10 @@ endif
ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
KBUILD_CPPFLAGS += -mbig-endian
CHECKFLAGS += -D__ARMEB__
AS += -EB
KBUILD_LDFLAGS += -EB
else
KBUILD_CPPFLAGS += -mlittle-endian
CHECKFLAGS += -D__ARMEL__
AS += -EL
KBUILD_LDFLAGS += -EL
endif

2
arch/arm/boot/deflate_xip_data.sh
View File

@ -56,7 +56,7 @@ trap 'rm -f "$XIPIMAGE.tmp"; exit 1' 1 2 3
# substitute the data section by a compressed version
$DD if="$XIPIMAGE" count=$data_start iflag=count_bytes of="$XIPIMAGE.tmp"
$DD if="$XIPIMAGE" skip=$data_start iflag=skip_bytes |
gzip -9 >> "$XIPIMAGE.tmp"
$_GZIP -9 >> "$XIPIMAGE.tmp"
# replace kernel binary
mv -f "$XIPIMAGE.tmp" "$XIPIMAGE"

2
arch/arm64/Makefile
View File

@ -94,7 +94,6 @@ endif
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
KBUILD_CPPFLAGS += -mbig-endian
CHECKFLAGS += -D__AARCH64EB__
AS += -EB
# Prefer the baremetal ELF build target, but not all toolchains include
# it so fall back to the standard linux version if needed.
KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb)
@ -102,7 +101,6 @@ UTS_MACHINE := aarch64_be
else
KBUILD_CPPFLAGS += -mlittle-endian
CHECKFLAGS += -D__AARCH64EL__
AS += -EL
# Same as above, prefer ELF but fall back to linux target if needed.
KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux)
UTS_MACHINE := aarch64

2
arch/h8300/boot/compressed/Makefile
View File

@ -18,7 +18,7 @@ CONFIG_MEMORY_START ?= 0x00400000
CONFIG_BOOT_LINK_OFFSET ?= 0x00280000
IMAGE_OFFSET := $(shell printf "0x%08x" $$(($(CONFIG_MEMORY_START)+$(CONFIG_BOOT_LINK_OFFSET))))
LIBGCC := $(shell $(CROSS-COMPILE)$(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
LIBGCC := $(shell $(CROSS-COMPILE)$(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name 2>/dev/null)
LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -estartup -T $(obj)/vmlinux.lds \
--defsym output=$(CONFIG_MEMORY_START)

2
arch/hexagon/Makefile
View File

@ -30,7 +30,7 @@ TIR_NAME := r19
KBUILD_CFLAGS += -ffixed-$(TIR_NAME) -DTHREADINFO_REG=$(TIR_NAME) -D__linux__
KBUILD_AFLAGS += -DTHREADINFO_REG=$(TIR_NAME)
LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name 2>/dev/null)
libs-y += $(LIBGCC)
head-y := arch/hexagon/kernel/head.o

2
arch/ia64/Makefile
View File

@ -40,7 +40,7 @@ $(error Sorry, you need a newer version of the assember, one that is built from
endif
quiet_cmd_gzip = GZIP $@
cmd_gzip = cat $(real-prereqs) | gzip -n -f -9 > $@
cmd_gzip = cat $(real-prereqs) | $(_GZIP) -n -f -9 > $@
quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@

8
arch/m68k/Makefile
View File

@ -135,10 +135,10 @@ vmlinux.gz: vmlinux
ifndef CONFIG_KGDB
cp vmlinux vmlinux.tmp
$(STRIP) vmlinux.tmp
gzip -9c vmlinux.tmp >vmlinux.gz
$(_GZIP) -9c vmlinux.tmp >vmlinux.gz
rm vmlinux.tmp
else
gzip -9c vmlinux >vmlinux.gz
$(_GZIP) -9c vmlinux >vmlinux.gz
endif
bzImage: vmlinux.bz2
@ -148,10 +148,10 @@ vmlinux.bz2: vmlinux
ifndef CONFIG_KGDB
cp vmlinux vmlinux.tmp
$(STRIP) vmlinux.tmp
bzip2 -1c vmlinux.tmp >vmlinux.bz2
$(_BZIP2) -1c vmlinux.tmp >vmlinux.bz2
rm vmlinux.tmp
else
bzip2 -1c vmlinux >vmlinux.bz2
$(_BZIP2) -1c vmlinux >vmlinux.bz2
endif
archclean:

2
arch/parisc/Makefile
View File

@ -162,7 +162,7 @@ vmlinuz: bzImage
$(OBJCOPY) $(boot)/bzImage $@
else
vmlinuz: vmlinux
@gzip -cf -9 $< > $@
@$(_GZIP) -cf -9 $< > $@
endif
install:

2
arch/um/Makefile
View File

@ -140,7 +140,7 @@ export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
# When cleaning we don't include .config, so we don't include
# TT or skas makefiles and don't clean skas_ptregs.h.
CLEAN_FILES += linux x.i gmon.out
MRPROPER_DIRS += arch/$(SUBARCH)/include/generated
MRPROPER_FILES += arch/$(SUBARCH)/include/generated
archclean:
@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \

4
arch/um/drivers/Makefile
View File

@ -18,9 +18,9 @@ ubd-objs := ubd_kern.o ubd_user.o
port-objs := port_kern.o port_user.o
harddog-objs := harddog_kern.o harddog_user.o
LDFLAGS_pcap.o := -r $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
LDFLAGS_pcap.o = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
LDFLAGS_vde.o := -r $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
LDFLAGS_vde.o = $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
targets := pcap_kern.o pcap_user.o vde_kern.o vde_user.o

4
arch/unicore32/lib/Makefile
View File

@ -10,12 +10,12 @@ lib-y += strncpy_from_user.o strnlen_user.o
lib-y += clear_user.o copy_page.o
lib-y += copy_from_user.o copy_to_user.o
GNU_LIBC_A := $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libc.a)
GNU_LIBC_A = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libc.a)
GNU_LIBC_A_OBJS := memchr.o memcpy.o memmove.o memset.o
GNU_LIBC_A_OBJS += strchr.o strrchr.o
GNU_LIBC_A_OBJS += rawmemchr.o # needed by strrchr.o
GNU_LIBGCC_A := $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libgcc.a)
GNU_LIBGCC_A = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libgcc.a)
GNU_LIBGCC_A_OBJS := _ashldi3.o _ashrdi3.o _lshrdi3.o
GNU_LIBGCC_A_OBJS += _divsi3.o _modsi3.o _ucmpdi2.o _umodsi3.o _udivsi3.o

2
include/linux/kconfig.h
View File

@ -2,6 +2,8 @@
#ifndef __LINUX_KCONFIG_H
#define __LINUX_KCONFIG_H
/* CONFIG_CC_VERSION_TEXT (Do not delete this comment. See help in Kconfig) */
#include <generated/autoconf.h>
#ifdef CONFIG_CPU_BIG_ENDIAN

30
init/Kconfig
View File

@ -8,8 +8,25 @@ config DEFCONFIG_LIST
default "/boot/config-$(shell,uname -r)"
default "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)"
config CC_VERSION_TEXT
string
default "$(CC_VERSION_TEXT)"
help
This is used in unclear ways:
- Re-run Kconfig when the compiler is updated
The 'default' property references the environment variable,
CC_VERSION_TEXT so it is recorded in include/config/auto.conf.cmd.
When the compiler is updated, Kconfig will be invoked.
- Ensure full rebuild when the compier is updated
include/linux/kconfig.h contains this option in the comment line so
fixdep adds include/config/cc/version/text.h into the auto-generated
dependency. When the compiler is updated, syncconfig will touch it
and then every file will be rebuilt.
config CC_IS_GCC
def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
def_bool $(success,echo "$(CC_VERSION_TEXT)" | grep -q gcc)
config GCC_VERSION
int
@ -21,7 +38,7 @@ config LD_VERSION
default $(shell,$(LD) --version | $(srctree)/scripts/ld-version.sh)
config CC_IS_CLANG
def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
def_bool $(success,echo "$(CC_VERSION_TEXT)" | grep -q clang)
config LD_IS_LLD
def_bool $(success,$(LD) -v | head -n 1 | grep -q LLD)
@ -31,7 +48,14 @@ config CLANG_VERSION
default $(shell,$(srctree)/scripts/clang-version.sh $(CC))
config CC_CAN_LINK
def_bool $(success,$(srctree)/scripts/cc-can-link.sh $(CC))
bool
default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(m64-flag)) if 64BIT
default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(m32-flag))
config CC_CAN_LINK_STATIC
bool
default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) -static $(m64-flag)) if 64BIT
default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) -static $(m32-flag))
config CC_HAS_ASM_GOTO
def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC))

2
init/Makefile
View File

@ -35,4 +35,4 @@ include/generated/compile.h: FORCE
@$($(quiet)chk_compile.h)
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \
"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" \
"$(CONFIG_PREEMPT_RT)" "$(CC)" "$(LD)"
"$(CONFIG_PREEMPT_RT)" $(CONFIG_CC_VERSION_TEXT) "$(LD)"

2
kernel/gen_kheaders.sh
View File

@ -88,7 +88,7 @@ find $cpio_dir -type f -print0 |
find $cpio_dir -printf "./%P\n" | LC_ALL=C sort | \
tar "${KBUILD_BUILD_TIMESTAMP:+--mtime=$KBUILD_BUILD_TIMESTAMP}" \
--owner=0 --group=0 --numeric-owner --no-recursion \
-Jcf $tarfile -C $cpio_dir/ -T - > /dev/null
-I $XZ -cf $tarfile -C $cpio_dir/ -T - > /dev/null
echo $headers_md5 > kernel/kheaders.md5
echo "$this_file_md5" >> kernel/kheaders.md5

17
lib/Kconfig.debug
View File

@ -213,6 +213,23 @@ config DEBUG_INFO_REDUCED
DEBUG_INFO build and compile times are reduced too.
Only works with newer gcc versions.
config DEBUG_INFO_COMPRESSED
bool "Compressed debugging information"
depends on DEBUG_INFO
depends on $(cc-option,-gz=zlib)
depends on $(as-option,-Wa$(comma)--compress-debug-sections=zlib)
depends on $(ld-option,--compress-debug-sections=zlib)
help
Compress the debug information using zlib. Requires GCC 5.0+ or Clang
5.0+, binutils 2.26+, and zlib.
Users of dpkg-deb via scripts/package/builddeb may find an increase in
size of their debug .deb packages with this config set, due to the
debug info being compressed with zlib, then the object files being
recompressed with a different compression scheme. But this is still
preferable to setting $KDEB_COMPRESS to "none" which would be even
larger.
config DEBUG_INFO_SPLIT
bool "Produce split debuginfo in .dwo files"
depends on DEBUG_INFO

6
net/bpfilter/Kconfig
View File

@ -9,8 +9,12 @@ menuconfig BPFILTER
if BPFILTER
config BPFILTER_UMH
tristate "bpfilter kernel module with user mode helper"
depends on CC_CAN_LINK
depends on CC_CAN_LINK_STATIC
default m
help
This builds bpfilter kernel module with embedded user mode helper
Note: your toolchain must support building static binaries, since
rootfs isn't mounted at the time when __init functions are called
and do_execv won't be able to find the elf interpreter.
endif

11
net/bpfilter/Makefile
View File

@ -3,17 +3,14 @@
# Makefile for the Linux BPFILTER layer.
#
hostprogs := bpfilter_umh
userprogs := bpfilter_umh
bpfilter_umh-objs := main.o
KBUILD_HOSTCFLAGS += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi
HOSTCC := $(CC)
userccflags += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi
ifeq ($(CONFIG_BPFILTER_UMH), y)
# builtin bpfilter_umh should be compiled with -static
# builtin bpfilter_umh should be linked with -static
# since rootfs isn't mounted at the time of __init
# function is called and do_execv won't find elf interpreter
KBUILD_HOSTLDFLAGS += -static
endif
userldflags += -static
$(obj)/bpfilter_umh_blob.o: $(obj)/bpfilter_umh

26
samples/Kconfig
View File

@ -6,6 +6,10 @@ menuconfig SAMPLES
if SAMPLES
config SAMPLE_AUXDISPLAY
bool "auxdisplay sample"
depends on CC_CAN_LINK
config SAMPLE_TRACE_EVENTS
tristate "Build trace_events examples -- loadable modules only"
depends on EVENT_TRACING && m
@ -118,19 +122,29 @@ config SAMPLE_CONNECTOR
config SAMPLE_HIDRAW
bool "hidraw sample"
depends on HEADERS_INSTALL
depends on CC_CAN_LINK && HEADERS_INSTALL
config SAMPLE_PIDFD
bool "pidfd sample"
depends on HEADERS_INSTALL
depends on CC_CAN_LINK && HEADERS_INSTALL
config SAMPLE_SECCOMP
bool "Build seccomp sample code"
depends on SECCOMP_FILTER && HEADERS_INSTALL
depends on SECCOMP_FILTER && CC_CAN_LINK && HEADERS_INSTALL
help
Build samples of seccomp filters using various methods of
BPF filter construction.
config SAMPLE_TIMER
bool "Timer sample"
depends on CC_CAN_LINK && HEADERS_INSTALL
config SAMPLE_UHID
bool "UHID sample"
depends on CC_CAN_LINK && HEADERS_INSTALL
help
Build UHID sample program.
config SAMPLE_VFIO_MDEV_MTTY
tristate "Build VFIO mtty example mediated device sample code -- loadable modules only"
depends on VFIO_MDEV_DEVICE && m
@ -178,7 +192,7 @@ config SAMPLE_ANDROID_BINDERFS
config SAMPLE_VFS
bool "Build example programs that use new VFS system calls"
depends on HEADERS_INSTALL
depends on CC_CAN_LINK && HEADERS_INSTALL
help
Build example userspace programs that use new VFS system calls such
as mount API and statx(). Note that this is restricted to the x86
@ -187,8 +201,12 @@ config SAMPLE_VFS
config SAMPLE_INTEL_MEI
bool "Build example program working with intel mei driver"
depends on INTEL_MEI
depends on CC_CAN_LINK && HEADERS_INSTALL
help
Build a sample program to work with mei device.
config SAMPLE_WATCHDOG
bool "watchdog sample"
depends on CC_CAN_LINK
endif # SAMPLES

5
samples/Makefile
View File

@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
# Makefile for Linux samples code
OBJECT_FILES_NON_STANDARD := y
subdir-$(CONFIG_SAMPLE_AUXDISPLAY) += auxdisplay
obj-$(CONFIG_SAMPLE_ANDROID_BINDERFS) += binderfs/
obj-$(CONFIG_SAMPLE_CONFIGFS) += configfs/
obj-$(CONFIG_SAMPLE_CONNECTOR) += connector/
@ -16,11 +16,14 @@ subdir-$(CONFIG_SAMPLE_PIDFD) += pidfd
obj-$(CONFIG_SAMPLE_QMI_CLIENT) += qmi/
obj-$(CONFIG_SAMPLE_RPMSG_CLIENT) += rpmsg/
subdir-$(CONFIG_SAMPLE_SECCOMP) += seccomp
subdir-$(CONFIG_SAMPLE_TIMER) += timers
obj-$(CONFIG_SAMPLE_TRACE_EVENTS) += trace_events/
obj-$(CONFIG_SAMPLE_TRACE_PRINTK) += trace_printk/
obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace/
obj-$(CONFIG_SAMPLE_TRACE_ARRAY) += ftrace/
subdir-$(CONFIG_SAMPLE_UHID) += uhid
obj-$(CONFIG_VIDEO_PCI_SKELETON) += v4l/
obj-y += vfio-mdev/
subdir-$(CONFIG_SAMPLE_VFS) += vfs
obj-$(CONFIG_SAMPLE_INTEL_MEI) += mei/
subdir-$(CONFIG_SAMPLE_WATCHDOG) += watchdog

11
samples/auxdisplay/Makefile
View File

@ -1,10 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
CC := $(CROSS_COMPILE)gcc
CFLAGS := -I../../usr/include
PROGS := cfag12864b-example
all: $(PROGS)
clean:
rm -fr $(PROGS)
userprogs := cfag12864b-example
always-y := $(userprogs)

12
samples/connector/Makefile
View File

@ -1,13 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_SAMPLE_CONNECTOR) += cn_test.o
# List of programs to build
hostprogs := ucon
always-y := $(hostprogs)
userprogs := ucon
always-$(CONFIG_CC_CAN_LINK) := $(userprogs)
HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include
all: modules
modules clean:
$(MAKE) -C ../.. M=$(CURDIR) $@
userccflags += -I usr/include

9
samples/hidraw/Makefile
View File

@ -1,8 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
# List of programs to build
hostprogs := hid-example
always-y := $(hostprogs)
userprogs := hid-example
always-y := $(userprogs)
HOSTCFLAGS_hid-example.o += -I$(objtree)/usr/include
all: hid-example
userccflags += -I usr/include

9
samples/mei/Makefile
View File

@ -1,10 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2012-2019, Intel Corporation. All rights reserved.
hostprogs := mei-amt-version
userprogs := mei-amt-version
always-y := $(userprogs)
HOSTCFLAGS_mei-amt-version.o += -I$(objtree)/usr/include
always-y := $(hostprogs)
all: mei-amt-version
userccflags += -I usr/include

8
samples/pidfd/Makefile
View File

@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
hostprogs := pidfd-metadata
always-y := $(hostprogs)
HOSTCFLAGS_pidfd-metadata.o += -I$(objtree)/usr/include
all: pidfd-metadata
usertprogs := pidfd-metadata
always-y := $(userprogs)
userccflags += -I usr/include

42
samples/seccomp/Makefile
View File

@ -1,44 +1,8 @@
# SPDX-License-Identifier: GPL-2.0
ifndef CROSS_COMPILE
hostprogs := bpf-fancy dropper bpf-direct user-trap
userprogs := bpf-fancy dropper bpf-direct user-trap
HOSTCFLAGS_bpf-fancy.o += -I$(objtree)/usr/include
HOSTCFLAGS_bpf-fancy.o += -idirafter $(objtree)/include
HOSTCFLAGS_bpf-helper.o += -I$(objtree)/usr/include
HOSTCFLAGS_bpf-helper.o += -idirafter $(objtree)/include
bpf-fancy-objs := bpf-fancy.o bpf-helper.o
HOSTCFLAGS_dropper.o += -I$(objtree)/usr/include
HOSTCFLAGS_dropper.o += -idirafter $(objtree)/include
dropper-objs := dropper.o
userccflags += -I usr/include
HOSTCFLAGS_bpf-direct.o += -I$(objtree)/usr/include
HOSTCFLAGS_bpf-direct.o += -idirafter $(objtree)/include
bpf-direct-objs := bpf-direct.o
HOSTCFLAGS_user-trap.o += -I$(objtree)/usr/include
HOSTCFLAGS_user-trap.o += -idirafter $(objtree)/include
user-trap-objs := user-trap.o
# Try to match the kernel target.
ifndef CONFIG_64BIT
# s390 has -m31 flag to build 31 bit binaries
ifndef CONFIG_S390
MFLAG = -m32
else
MFLAG = -m31
endif
HOSTCFLAGS_bpf-direct.o += $(MFLAG)
HOSTCFLAGS_dropper.o += $(MFLAG)
HOSTCFLAGS_bpf-helper.o += $(MFLAG)
HOSTCFLAGS_bpf-fancy.o += $(MFLAG)
HOSTCFLAGS_user-trap.o += $(MFLAG)
HOSTLDLIBS_bpf-direct += $(MFLAG)
HOSTLDLIBS_bpf-fancy += $(MFLAG)
HOSTLDLIBS_dropper += $(MFLAG)
HOSTLDLIBS_user-trap += $(MFLAG)
endif
always-y := $(hostprogs)
endif
always-y := $(userprogs)

17
samples/timers/Makefile
View File

@ -1,16 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
ifndef CROSS_COMPILE
uname_M := $(shell uname -m 2>/dev/null || echo not)
ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
userprogs := hpet_example
always-y := $(userprogs)
ifeq ($(ARCH),x86)
CC := $(CROSS_COMPILE)gcc
PROGS := hpet_example
all: $(PROGS)
clean:
rm -fr $(PROGS)
endif
endif
userccflags += -I usr/include

2
samples/uhid/.gitignore vendored Normal file
View File

@ -0,0 +1,2 @@
# SPDX-License-Identifier: GPL-2.0-only
/uhid-example

9
samples/uhid/Makefile
View File

@ -1,8 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
# List of programs to build
hostprogs := uhid-example
userprogs := uhid-example
always-y := $(userprogs)
# Tell kbuild to always build the programs
always-y := $(hostprogs)
HOSTCFLAGS_uhid-example.o += -I$(objtree)/usr/include
userccflags += -I usr/include

4
samples/uhid/uhid-example.c
View File

@ -165,7 +165,7 @@ static int uhid_write(int fd, const struct uhid_event *ev)
fprintf(stderr, "Cannot write to uhid: %m\n");
return -errno;
} else if (ret != sizeof(*ev)) {
fprintf(stderr, "Wrong size written to uhid: %ld != %lu\n",
fprintf(stderr, "Wrong size written to uhid: %zd != %zu\n",
ret, sizeof(ev));
return -EFAULT;
} else {
@ -236,7 +236,7 @@ static int event(int fd)
fprintf(stderr, "Cannot read uhid-cdev: %m\n");
return -errno;
} else if (ret != sizeof(ev)) {
fprintf(stderr, "Invalid size read from uhid-dev: %ld != %lu\n",
fprintf(stderr, "Invalid size read from uhid-dev: %zd != %zu\n",
ret, sizeof(ev));
return -EFAULT;
}

11
samples/vfs/Makefile
View File

@ -1,10 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
# List of programs to build
hostprogs := \
test-fsmount \
test-statx
userprogs := test-fsmount test-statx
always-y := $(userprogs)
always-y := $(hostprogs)
HOSTCFLAGS_test-fsmount.o += -I$(objtree)/usr/include
HOSTCFLAGS_test-statx.o += -I$(objtree)/usr/include
userccflags += -I usr/include

10
samples/watchdog/Makefile
View File

@ -1,9 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
CC := $(CROSS_COMPILE)gcc
PROGS := watchdog-simple
all: $(PROGS)
clean:
rm -fr $(PROGS)
userprogs := watchdog-simple
always-y := $(userprogs)

2
scripts/Kbuild.include
View File

@ -16,7 +16,7 @@ pound := \#
dot-target = $(dir $@).$(notdir $@)
###
# The temporary file to save gcc -MD generated dependencies must not
# The temporary file to save gcc -MMD generated dependencies must not
# contain a comma
depfile = $(subst $(comma),_,$(dot-target).d)

67
scripts/Makefile.build
View File

@ -50,6 +50,12 @@ ifneq ($(hostprogs)$(hostcxxlibs-y)$(hostcxxlibs-m),)
include scripts/Makefile.host
endif
# Do not include userprogs rules unless needed.
userprogs := $(sort $(userprogs))
ifneq ($(userprogs),)
include scripts/Makefile.userprogs
endif
ifndef obj
$(warning kbuild: Makefile.build is included improperly)
endif
@ -63,19 +69,27 @@ endif
# ===========================================================================
# subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...)
subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y)))
subdir-modorder := $(sort $(filter %/modules.order, $(obj-m)))
targets-for-builtin := $(extra-y)
ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
lib-target := $(obj)/lib.a
targets-for-builtin += $(obj)/lib.a
endif
ifdef need-builtin
builtin-target := $(obj)/built-in.a
targets-for-builtin += $(obj)/built-in.a
endif
ifeq ($(CONFIG_MODULES)$(need-modorder),y1)
modorder-target := $(obj)/modules.order
targets-for-modules := $(patsubst %.o, %.mod, $(filter %.o, $(obj-m)))
ifdef need-modorder
targets-for-modules += $(obj)/modules.order
endif
mod-targets := $(patsubst %.o, %.mod, $(obj-m))
targets += $(targets-for-builtin) $(targets-for-modules)
# Linus' kernel sanity checking tool
ifeq ($(KBUILD_CHECKSRC),1)
@ -274,8 +288,6 @@ cmd_mod = { \
$(obj)/%.mod: $(obj)/%.o FORCE
$(call if_changed,mod)
targets += $(mod-targets)
quiet_cmd_cc_lst_c = MKLST $@
cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
@ -348,8 +360,9 @@ endif
$(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE
$(call if_changed_rule,as_o_S)
targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y)
targets += $(extra-y) $(always-y) $(MAKECMDGOALS)
targets += $(filter-out $(subdir-builtin), $(real-obj-y))
targets += $(filter-out $(subdir-modorder), $(real-obj-m))
targets += $(lib-y) $(always-y) $(MAKECMDGOALS)
# Linker scripts preprocessor (.lds.S -> .lds)
# ---------------------------------------------------------------------------
@ -373,44 +386,40 @@ $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
# ---------------------------------------------------------------------------
# To build objects in subdirs, we need to descend into the directories
$(obj)/%/built-in.a: $(obj)/% ;
$(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ;
$(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ;
#
# Rule to compile a set of .o files into one .a file (without symbol table)
#
ifdef builtin-target
quiet_cmd_ar_builtin = AR $@
cmd_ar_builtin = rm -f $@; $(AR) cDPrST $@ $(real-prereqs)
$(builtin-target): $(real-obj-y) FORCE
$(obj)/built-in.a: $(real-obj-y) FORCE
$(call if_changed,ar_builtin)
targets += $(builtin-target)
endif # builtin-target
#
# Rule to create modules.order file
#
# Create commands to either record .ko file or cat modules.order from
# a subdirectory
$(modorder-target): $(subdir-ym) FORCE
$(Q){ $(foreach m, $(modorder), \
$(if $(filter %/modules.order, $m), cat $m, echo $m);) :; } \
# Add $(obj-m) as the prerequisite to avoid updating the timestamp of
# modules.order unless contained modules are updated.
cmd_modules_order = { $(foreach m, $(real-prereqs), \
$(if $(filter %/modules.order, $m), cat $m, echo $(patsubst %.o,%.ko,$m));) :; } \
| $(AWK) '!x[$$0]++' - > $@
$(obj)/modules.order: $(obj-m) FORCE
$(call if_changed,modules_order)
#
# Rule to compile a set of .o files into one .a file (with symbol table)
#
ifdef lib-target
$(lib-target): $(lib-y) FORCE
$(obj)/lib.a: $(lib-y) FORCE
$(call if_changed,ar)
targets += $(lib-target)
endif
# NOTE:
# Do not replace $(filter %.o,^) with $(real-prereqs). When a single object
# module is turned into a multi object module, $^ will contain header file
@ -473,8 +482,8 @@ endif
else
__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
$(if $(KBUILD_MODULES),$(obj-m) $(mod-targets) $(modorder-target)) \
__build: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \
$(if $(KBUILD_MODULES), $(targets-for-modules)) \
$(subdir-ym) $(always-y)
@:
@ -487,8 +496,8 @@ PHONY += $(subdir-ym)
$(subdir-ym):
$(Q)$(MAKE) $(build)=$@ \
$(if $(filter $@/, $(KBUILD_SINGLE_TARGETS)),single-build=) \
need-builtin=$(if $(filter $@/built-in.a, $(subdir-obj-y)),1) \
need-modorder=$(if $(need-modorder),$(if $(filter $@/modules.order, $(modorder)),1))
need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \
need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1)
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------

2
scripts/Makefile.clean
View File

@ -29,7 +29,7 @@ subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn))
__clean-files := $(extra-y) $(extra-m) $(extra-) \
$(always) $(always-y) $(always-m) $(always-) $(targets) $(clean-files) \
$(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \
$(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) $(userprogs) \
$(hostcxxlibs-y) $(hostcxxlibs-m)
__clean-files := $(filter-out $(no-clean-files), $(__clean-files))

4
scripts/Makefile.host
View File

@ -88,8 +88,8 @@ _hostcxx_flags += -I $(objtree)/$(obj)
endif
endif
hostc_flags = -Wp,-MD,$(depfile) $(_hostc_flags)
hostcxx_flags = -Wp,-MD,$(depfile) $(_hostcxx_flags)
hostc_flags = -Wp,-MMD,$(depfile) $(_hostc_flags)
hostcxx_flags = -Wp,-MMD,$(depfile) $(_hostcxx_flags)
#####
# Compile programs on the host

79
scripts/Makefile.lib
View File

@ -4,8 +4,18 @@ asflags-y += $(EXTRA_AFLAGS)
ccflags-y += $(EXTRA_CFLAGS)
cppflags-y += $(EXTRA_CPPFLAGS)
ldflags-y += $(EXTRA_LDFLAGS)
ifneq ($(always),)
$(warning 'always' is deprecated. Please use 'always-y' instead)
always-y += $(always)
hostprogs += $(hostprogs-y) $(hostprogs-m)
endif
ifneq ($(hostprogs-y),)
$(warning 'hostprogs-y' is deprecated. Please use 'hostprogs' instead)
hostprogs += $(hostprogs-y)
endif
ifneq ($(hostprogs-m),)
$(warning 'hostprogs-m' is deprecated. Please use 'hostprogs' instead)
hostprogs += $(hostprogs-m)
endif
# flags that take effect in current and sub directories
KBUILD_AFLAGS += $(subdir-asflags-y)
@ -22,40 +32,35 @@ obj-m := $(filter-out $(obj-y),$(obj-m))
# Filter out objects already built-in
lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
# Determine modorder.
# Unfortunately, we don't have information about ordering between -y
# and -m subdirs. Just put -y's first.
modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
# Subdirectories we need to descend into
subdir-ym := $(sort $(subdir-y) $(subdir-m) \
$(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m))))
# Handle objects in subdirs:
# - If we encounter foo/ in $(obj-y), replace it by foo/built-in.a and
# foo/modules.order
# - If we encounter foo/ in $(obj-m), replace it by foo/modules.order
#
# Generate modules.order to determine modorder. Unfortunately, we don't have
# information about ordering between -y and -m subdirs. Just put -y's first.
ifdef need-modorder
obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m))
else
obj-m := $(filter-out %/, $(obj-m))
endif
# Handle objects in subdirs
# ---------------------------------------------------------------------------
# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.a
# and add the directory to the list of dirs to descend into: $(subdir-y)
# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
# and add the directory to the list of dirs to descend into: $(subdir-m)
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
subdir-y += $(__subdir-y)
__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
subdir-m += $(__subdir-m)
ifdef need-builtin
obj-y := $(patsubst %/, %/built-in.a, $(obj-y))
else
obj-y := $(filter-out %/, $(obj-y))
endif
obj-m := $(filter-out %/, $(obj-m))
# Subdirectories we need to descend into
subdir-ym := $(sort $(subdir-y) $(subdir-m))
# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object
multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))), $(m))))
multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))), $(m))))
multi-used := $(multi-used-y) $(multi-used-m)
# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
# tell kbuild to descend
subdir-obj-y := $(filter %/built-in.a, $(obj-y))
# Replace multi-part objects by their individual parts,
# including built-in.a from subdirectories
real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
@ -78,10 +83,8 @@ endif
extra-y := $(addprefix $(obj)/,$(extra-y))
always-y := $(addprefix $(obj)/,$(always-y))
targets := $(addprefix $(obj)/,$(targets))
modorder := $(addprefix $(obj)/,$(modorder))
obj-m := $(addprefix $(obj)/,$(obj-m))
lib-y := $(addprefix $(obj)/,$(lib-y))
subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
@ -171,22 +174,22 @@ modkern_aflags = $(if $(part-of-module), \
$(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \
$(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL))
c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
c_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
-include $(srctree)/include/linux/compiler_types.h \
$(_c_flags) $(modkern_cflags) \
$(basename_flags) $(modname_flags)
a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
a_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
$(_a_flags) $(modkern_aflags)
cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
cpp_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
$(_cpp_flags)
ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes
dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc \
$(addprefix -I,$(DTC_INCLUDE)) \
-undef -D__DTS__
@ -241,7 +244,7 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
# ---------------------------------------------------------------------------
quiet_cmd_gzip = GZIP $@
cmd_gzip = cat $(real-prereqs) | gzip -n -f -9 > $@
cmd_gzip = cat $(real-prereqs) | $(_GZIP) -n -f -9 > $@
# DTC
# ---------------------------------------------------------------------------
@ -287,13 +290,13 @@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE
quiet_cmd_dtc = DTC $@
cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
$(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
$(DTC) -O $(2) -o $@ -b 0 \
$(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \
$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
-d $(depfile).dtc.tmp $(dtc-tmp) ; \
cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
$(call if_changed_dep,dtc,dtb)
$(call if_changed_dep,dtc)
DT_CHECKER ?= dt-validate
DT_BINDING_DIR := Documentation/devicetree/bindings
@ -304,7 +307,7 @@ quiet_cmd_dtb_check = CHECK $@
cmd_dtb_check = $(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@
define rule_dtc
$(call cmd_and_fixdep,dtc,yaml)
$(call cmd_and_fixdep,dtc)
$(call cmd,dtb_check)
endef
@ -334,19 +337,19 @@ printf "%08x\n" $$dec_size | \
)
quiet_cmd_bzip2 = BZIP2 $@
cmd_bzip2 = { cat $(real-prereqs) | bzip2 -9; $(size_append); } > $@
cmd_bzip2 = { cat $(real-prereqs) | $(_BZIP2) -9; $(size_append); } > $@
# Lzma
# ---------------------------------------------------------------------------
quiet_cmd_lzma = LZMA $@
cmd_lzma = { cat $(real-prereqs) | lzma -9; $(size_append); } > $@
cmd_lzma = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@
quiet_cmd_lzo = LZO $@
cmd_lzo = { cat $(real-prereqs) | lzop -9; $(size_append); } > $@
cmd_lzo = { cat $(real-prereqs) | $(_LZOP) -9; $(size_append); } > $@
quiet_cmd_lz4 = LZ4 $@
cmd_lz4 = { cat $(real-prereqs) | lz4c -l -c1 stdin stdout; \
cmd_lz4 = { cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout; \
$(size_append); } > $@
# U-Boot mkimage
@ -393,7 +396,7 @@ quiet_cmd_xzkern = XZKERN $@
$(size_append); } > $@
quiet_cmd_xzmisc = XZMISC $@
cmd_xzmisc = cat $(real-prereqs) | xz --check=crc32 --lzma2=dict=1MiB > $@
cmd_xzmisc = cat $(real-prereqs) | $(XZ) --check=crc32 --lzma2=dict=1MiB > $@
# ASM offsets
# ---------------------------------------------------------------------------

75
scripts/Makefile.modpost
View File

@ -43,34 +43,30 @@ __modpost:
include include/config/auto.conf
include scripts/Kbuild.include
kernelsymfile := $(objtree)/Module.symvers
modulesymfile := $(firstword $(KBUILD_EXTMOD))/Module.symvers
MODPOST = scripts/mod/modpost \
$(if $(CONFIG_MODVERSIONS),-m) \
$(if $(CONFIG_MODULE_SRCVERSION_ALL),-a) \
$(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile) \
$(if $(KBUILD_EXTMOD),$(addprefix -e ,$(KBUILD_EXTRA_SYMBOLS))) \
$(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N) \
$(if $(KBUILD_MODPOST_WARN),-w)
$(if $(KBUILD_MODPOST_WARN),-w) \
-o $@
ifdef MODPOST_VMLINUX
quiet_cmd_modpost = MODPOST vmlinux.o
cmd_modpost = $(MODPOST) vmlinux.o
quiet_cmd_modpost = MODPOST $@
cmd_modpost = $(MODPOST) $<
__modpost:
vmlinux.symvers: vmlinux.o
$(call cmd,modpost)
__modpost: vmlinux.symvers
else
MODPOST += $(subst -i,-n,$(filter -i,$(MAKEFLAGS))) -s -T - \
$(if $(KBUILD_NSDEPS),-d $(MODULES_NSDEPS))
ifeq ($(KBUILD_EXTMOD),)
MODPOST += $(wildcard vmlinux)
input-symdump := vmlinux.symvers
output-symdump := Module.symvers
else
# set src + obj - they may be used in the modules's Makefile
@ -80,22 +76,57 @@ src := $(obj)
# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
include $(if $(wildcard $(KBUILD_EXTMOD)/Kbuild), \
$(KBUILD_EXTMOD)/Kbuild, $(KBUILD_EXTMOD)/Makefile)
# modpost option for external modules
MODPOST += -e
input-symdump := Module.symvers $(KBUILD_EXTRA_SYMBOLS)
output-symdump := $(KBUILD_EXTMOD)/Module.symvers
endif
# find all modules listed in modules.order
modules := $(sort $(shell cat $(MODORDER)))
# modpost options for modules (both in-kernel and external)
MODPOST += \
$(addprefix -i ,$(wildcard $(input-symdump))) \
$(if $(KBUILD_NSDEPS),-d $(MODULES_NSDEPS)) \
$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N)
# Read out modules.order instead of expanding $(modules) to pass in modpost.
# 'make -i -k' ignores compile errors, and builds as many modules as possible.
ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
MODPOST += -n
endif
# Clear VPATH to not search for *.symvers in $(srctree). Check only $(objtree).
VPATH :=
$(input-symdump):
@echo >&2 'WARNING: Symbol version dump "$@" is missing.'
@echo >&2 ' Modules may not have dependencies or modversions.'
# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
quiet_cmd_modpost = MODPOST $(words $(modules)) modules
cmd_modpost = sed 's/ko$$/o/' $(MODORDER) | $(MODPOST)
quiet_cmd_modpost = MODPOST $@
cmd_modpost = sed 's/ko$$/o/' $< | $(MODPOST) -T -
__modpost:
$(call cmd,modpost)
$(output-symdump): $(MODORDER) $(input-symdump) FORCE
$(call if_changed,modpost)
targets += $(output-symdump)
__modpost: $(output-symdump)
ifneq ($(KBUILD_MODPOST_NOFINAL),1)
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
endif
PHONY += FORCE
FORCE:
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
PHONY += FORCE
FORCE:
endif
.PHONY: $(PHONY)

8
scripts/Makefile.package
View File

@ -45,7 +45,7 @@ if test "$(objtree)" != "$(srctree)"; then \
false; \
fi ; \
$(srctree)/scripts/setlocalversion --save-scmversion; \
tar -cz $(RCS_TAR_IGNORE) -f $(2).tar.gz \
tar -I $(_GZIP) -c $(RCS_TAR_IGNORE) -f $(2).tar.gz \
--transform 's:^:$(2)/:S' $(TAR_CONTENT) $(3); \
rm -f $(objtree)/.scmversion
@ -127,9 +127,9 @@ util/PERF-VERSION-GEN $(CURDIR)/$(perf-tar)/); \
tar rf $(perf-tar).tar $(perf-tar)/HEAD $(perf-tar)/PERF-VERSION-FILE; \
rm -r $(perf-tar); \
$(if $(findstring tar-src,$@),, \
$(if $(findstring bz2,$@),bzip2, \
$(if $(findstring gz,$@),gzip, \
$(if $(findstring xz,$@),xz, \
$(if $(findstring bz2,$@),$(_BZIP2), \
$(if $(findstring gz,$@),$(_GZIP), \
$(if $(findstring xz,$@),$(XZ), \
$(error unknown target $@)))) \
-f -9 $(perf-tar).tar)

45
scripts/Makefile.userprogs Normal file
View File

@ -0,0 +1,45 @@
# SPDX-License-Identifier: GPL-2.0-only
#
# Build userspace programs for the target system
#
# Executables compiled from a single .c file
user-csingle := $(foreach m, $(userprogs), $(if $($(m)-objs),,$(m)))
# Executables linked based on several .o files
user-cmulti := $(foreach m, $(userprogs), $(if $($(m)-objs),$(m)))
# Objects compiled from .c files
user-cobjs := $(sort $(foreach m, $(userprogs), $($(m)-objs)))
user-csingle := $(addprefix $(obj)/, $(user-csingle))
user-cmulti := $(addprefix $(obj)/, $(user-cmulti))
user-cobjs := $(addprefix $(obj)/, $(user-cobjs))
user_ccflags = -Wp,-MMD,$(depfile) $(KBUILD_USERCFLAGS) $(userccflags) \
$($(target-stem)-userccflags)
user_ldflags = $(KBUILD_USERLDFLAGS) $(userldflags) $($(target-stem)-userldflags)
# Create an executable from a single .c file
quiet_cmd_user_cc_c = CC [U] $@
cmd_user_cc_c = $(CC) $(user_ccflags) $(user_ldflags) -o $@ $< \
$($(target-stem)-userldlibs)
$(user-csingle): $(obj)/%: $(src)/%.c FORCE
$(call if_changed_dep,user_cc_c)
# Link an executable based on list of .o files
quiet_cmd_user_ld = LD [U] $@
cmd_user_ld = $(CC) $(user_ldflags) -o $@ \
$(addprefix $(obj)/, $($(target-stem)-objs)) \
$($(target-stem)-userldlibs)
$(user-cmulti): FORCE
$(call if_changed,user_ld)
$(call multi_depend, $(user-cmulti), , -objs)
# Create .o file from a .c file
quiet_cmd_user_cc_o_c = CC [U] $@
cmd_user_cc_o_c = $(CC) $(user_ccflags) -c -o $@ $<
$(user-cobjs): $(obj)/%.o: $(src)/%.c FORCE
$(call if_changed_dep,user_cc_o_c)
targets += $(user-csingle) $(user-cmulti) $(user-cobjs)

2
scripts/basic/fixdep.c
View File

@ -160,7 +160,7 @@ struct item {
struct item *next;
unsigned int len;
unsigned int hash;
char name[0];
char name[];
};
#define HASHSZ 256

89
scripts/checkstack.pl
View File

@ -34,8 +34,10 @@ use strict;
# $& (whole re) matches the complete objdump line with the stack growth
# $1 (first bracket) matches the dynamic amount of the stack growth
#
# $sub: subroutine for special handling to check stack usage.
#
# use anything else and feel the pain ;)
my (@stack, $re, $dre, $x, $xs, $funcre);
my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
{
my $arch = shift;
if ($arch eq "") {
@ -43,6 +45,11 @@ my (@stack, $re, $dre, $x, $xs, $funcre);
chomp($arch);
}
$min_stack = shift;
if ($min_stack eq "" || $min_stack !~ /^\d+$/) {
$min_stack = 100;
}
$x = "[0-9a-f]"; # hex character
$xs = "[0-9a-f ]"; # hex character or space
$funcre = qr/^$x* <(.*)>:$/;
@ -53,7 +60,8 @@ my (@stack, $re, $dre, $x, $xs, $funcre);
$dre = qr/^.*sub.*sp, sp, #(0x$x{1,8})/o;
} elsif ($arch eq 'arm') {
#c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
$re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
$re = qr/.*sub.*sp, sp, #([0-9]{1,4})/o;
$sub = \&arm_push_handling;
} elsif ($arch =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) {
#c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
# or
@ -106,14 +114,51 @@ my (@stack, $re, $dre, $x, $xs, $funcre);
}
}
#
# To count stack usage of push {*, fp, ip, lr, pc} instruction in ARM,
# if FRAME POINTER is enabled.
# e.g. c01f0d48: e92ddff0 push {r4, r5, r6, r7, r8, r9, sl, fp, ip, lr, pc}
#
sub arm_push_handling {
my $regex = qr/.*push.*fp, ip, lr, pc}/o;
my $size = 0;
my $line_arg = shift;
if ($line_arg =~ m/$regex/) {
$size = $line_arg =~ tr/,//;
$size = ($size + 1) * 4;
}
return $size;
}
#
# main()
#
my ($func, $file, $lastslash);
my ($func, $file, $lastslash, $total_size, $addr, $intro);
$total_size = 0;
while (my $line = <STDIN>) {
if ($line =~ m/$funcre/) {
$func = $1;
next if $line !~ m/^($xs*)/;
if ($total_size > $min_stack) {
push @stack, "$intro$total_size\n";
}
$addr = $1;
$addr =~ s/ /0/g;
$addr = "0x$addr";
$intro = "$addr $func [$file]:";
my $padlen = 56 - length($intro);
while ($padlen > 0) {
$intro .= ' ';
$padlen -= 8;
}
$total_size = 0;
}
elsif ($line =~ m/(.*):\s*file format/) {
$file = $1;
@ -134,36 +179,22 @@ while (my $line = <STDIN>) {
}
next if ($size > 0x10000000);
next if $line !~ m/^($xs*)/;
my $addr = $1;
$addr =~ s/ /0/g;
$addr = "0x$addr";
my $intro = "$addr $func [$file]:";
my $padlen = 56 - length($intro);
while ($padlen > 0) {
$intro .= ' ';
$padlen -= 8;
}
next if ($size < 100);
push @stack, "$intro$size\n";
$total_size += $size;
}
elsif (defined $dre && $line =~ m/$dre/) {
my $size = "Dynamic ($1)";
my $size = $1;
next if $line !~ m/^($xs*)/;
my $addr = $1;
$addr =~ s/ /0/g;
$addr = "0x$addr";
my $intro = "$addr $func [$file]:";
my $padlen = 56 - length($intro);
while ($padlen > 0) {
$intro .= ' ';
$padlen -= 8;
}
push @stack, "$intro$size\n";
$size = hex($size) if ($size =~ /^0x/);
$total_size += $size;
}
elsif (defined $sub) {
my $size = &$sub($line);
$total_size += $size;
}
}
if ($total_size > $min_stack) {
push @stack, "$intro$total_size\n";
}
# Sort output by size (last field)

2
scripts/gcc-plugins/Makefile
View File

@ -14,7 +14,7 @@ $(objtree)/$(obj)/randomize_layout_seed.h: FORCE
$(call if_changed,create_randomize_layout_seed)
targets = randomize_layout_seed.h randomize_layout_hash.h
hostcxxlibs-y := $(foreach p,$(GCC_PLUGIN),$(if $(findstring /,$(p)),,$(p)))
hostcxxlibs-y := $(GCC_PLUGIN)
always-y := $(hostcxxlibs-y)
$(foreach p,$(hostcxxlibs-y:%.so=%),$(eval $(p)-objs := $(p).o))

11
scripts/headers_install.sh
View File

@ -64,7 +64,7 @@ configs=$(sed -e '
d
' $OUTFILE)
# The entries in the following list are not warned.
# The entries in the following list do not result in an error.
# Please do not add a new entry. This list is only for existing ones.
# The list will be reduced gradually, and deleted eventually. (hopefully)
#
@ -98,18 +98,19 @@ include/uapi/linux/raw.h:CONFIG_MAX_RAW_DEVS
for c in $configs
do
warn=1
leak_error=1
for ignore in $config_leak_ignores
do
if echo "$INFILE:$c" | grep -q "$ignore$"; then
warn=
leak_error=
break
fi
done
if [ "$warn" = 1 ]; then
echo "warning: $INFILE: leak $c to user-space" >&2
if [ "$leak_error" = 1 ]; then
echo "error: $INFILE: leak $c to user-space" >&2
exit 1
fi
done

2
scripts/link-vmlinux.sh
View File

@ -241,8 +241,6 @@ on_signals()
}
trap on_signals HUP INT QUIT TERM
#
#
# Use "make V=1" to debug this script
case "${KBUILD_VERBOSE}" in
*1*)

3
scripts/mkcompile_h
View File

@ -6,7 +6,7 @@ ARCH=$2
SMP=$3
PREEMPT=$4
PREEMPT_RT=$5
CC=$6
CC_VERSION="$6"
LD=$7
vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
@ -62,7 +62,6 @@ UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)"
printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY"
echo \#define LINUX_COMPILE_HOST \"$LINUX_COMPILE_HOST\"
CC_VERSION=$($CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//')
LD_VERSION=$($LD -v | head -n1 | sed 's/(compatible with [^)]*)//' \
| sed 's/[[:space:]]*$//')
printf '#define LINUX_COMPILER "%s"\n' "$CC_VERSION, $LD_VERSION"

2
scripts/mksysmap
View File

@ -41,4 +41,4 @@
# so we just ignore them to let readprofile continue to work.
# (At least sparc64 has __crc_ in the middle).
$NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)\|\( .L\)' > $2
$NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)\|\( \.L\)' > $2

384
scripts/mod/modpost.c
View File

@ -30,8 +30,6 @@ static int have_vmlinux = 0;
static int all_versions = 0;
/* If we are modposting external module set to 1 */
static int external_module = 0;
/* Warn about section mismatch in vmlinux if set to 1 */
static int vmlinux_section_warnings = 1;
/* Only warn about unresolved symbols */
static int warn_unresolved = 0;
/* How a symbol is exported */
@ -90,20 +88,6 @@ static inline bool strends(const char *str, const char *postfix)
return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
}
static int is_vmlinux(const char *modname)
{
const char *myname;
myname = strrchr(modname, '/');
if (myname)
myname++;
else
myname = modname;
return (strcmp(myname, "vmlinux") == 0) ||
(strcmp(myname, "vmlinux.o") == 0);
}
void *do_nofail(void *ptr, const char *expr)
{
if (!ptr)
@ -112,6 +96,55 @@ void *do_nofail(void *ptr, const char *expr)
return ptr;
}
char *read_text_file(const char *filename)
{
struct stat st;
size_t nbytes;
int fd;
char *buf;
fd = open(filename, O_RDONLY);
if (fd < 0) {
perror(filename);
exit(1);
}
if (fstat(fd, &st) < 0) {
perror(filename);
exit(1);
}
buf = NOFAIL(malloc(st.st_size + 1));
nbytes = st.st_size;
while (nbytes) {
ssize_t bytes_read;
bytes_read = read(fd, buf, nbytes);
if (bytes_read < 0) {
perror(filename);
exit(1);
}
nbytes -= bytes_read;
}
buf[st.st_size] = '\0';
close(fd);
return buf;
}
char *get_line(char **stringp)
{
/* do not return the unwanted extra line at EOF */
if (*stringp && **stringp == '\0')
return NULL;
return strsep(stringp, "\n");
}
/* A list of all modules we processed */
static struct module *modules;
@ -128,24 +161,20 @@ static struct module *find_module(const char *modname)
static struct module *new_module(const char *modname)
{
struct module *mod;
char *p;
mod = NOFAIL(malloc(sizeof(*mod)));
mod = NOFAIL(malloc(sizeof(*mod) + strlen(modname) + 1));
memset(mod, 0, sizeof(*mod));
p = NOFAIL(strdup(modname));
/* strip trailing .o */
if (strends(p, ".o")) {
p[strlen(p) - 2] = '\0';
mod->is_dot_o = 1;
}
/* add to list */
mod->name = p;
strcpy(mod->name, modname);
mod->is_vmlinux = (strcmp(modname, "vmlinux") == 0);
mod->gpl_compatible = -1;
mod->next = modules;
modules = mod;
if (mod->is_vmlinux)
have_vmlinux = 1;
return mod;
}
@ -161,12 +190,9 @@ struct symbol {
int crc_valid;
char *namespace;
unsigned int weak:1;
unsigned int vmlinux:1; /* 1 if symbol is defined in vmlinux */
unsigned int kernel:1; /* 1 if symbol is from kernel
* (only for external modules) **/
unsigned int is_static:1; /* 1 if symbol is not global */
enum export export; /* Type of export */
char name[0];
char name[];
};
static struct symbol *symbolhash[SYMBOL_HASH_SIZE];
@ -288,31 +314,34 @@ static enum export export_no(const char *s)
return export_unknown;
}
static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr)
static void *sym_get_data_by_offset(const struct elf_info *info,
unsigned int secindex, unsigned long offset)
{
return (void *)elf->hdr +
elf->sechdrs[elf->secindex_strings].sh_offset +
sechdr->sh_name;
}
static const char *sec_name(struct elf_info *elf, int secindex)
{
return sech_name(elf, &elf->sechdrs[secindex]);
}
static void *sym_get_data(const struct elf_info *info, const Elf_Sym *sym)
{
unsigned int secindex = get_secindex(info, sym);
Elf_Shdr *sechdr = &info->sechdrs[secindex];
unsigned long offset;
offset = sym->st_value;
if (info->hdr->e_type != ET_REL)
offset -= sechdr->sh_addr;
return (void *)info->hdr + sechdr->sh_offset + offset;
}
static void *sym_get_data(const struct elf_info *info, const Elf_Sym *sym)
{
return sym_get_data_by_offset(info, get_secindex(info, sym),
sym->st_value);
}
static const char *sech_name(const struct elf_info *info, Elf_Shdr *sechdr)
{
return sym_get_data_by_offset(info, info->secindex_strings,
sechdr->sh_name);
}
static const char *sec_name(const struct elf_info *info, int secindex)
{
return sech_name(info, &info->sechdrs[secindex]);
}
#define strstarts(str, prefix) (strncmp(str, prefix, strlen(prefix)) == 0)
static enum export export_from_secname(struct elf_info *elf, unsigned int sec)
@ -386,17 +415,15 @@ static struct symbol *sym_add_exported(const char *name, struct module *mod,
if (!s) {
s = new_symbol(name, mod, export);
} else if (!external_module || is_vmlinux(s->module->name) ||
} else if (!external_module || s->module->is_vmlinux ||
s->module == mod) {
warn("%s: '%s' exported twice. Previous export was in %s%s\n",
mod->name, name, s->module->name,
is_vmlinux(s->module->name) ? "" : ".ko");
s->module->is_vmlinux ? "" : ".ko");
return s;
}
s->module = mod;
s->vmlinux = is_vmlinux(mod->name);
s->kernel = 0;
s->export = export;
return s;
}
@ -416,7 +443,7 @@ static void sym_set_crc(const char *name, unsigned int crc)
s->crc_valid = 1;
}
void *grab_file(const char *filename, unsigned long *size)
static void *grab_file(const char *filename, size_t *size)
{
struct stat st;
void *map = MAP_FAILED;
@ -438,41 +465,7 @@ failed:
return map;
}
/**
* Return a copy of the next line in a mmap'ed file.
* spaces in the beginning of the line is trimmed away.
* Return a pointer to a static buffer.
**/
char *get_next_line(unsigned long *pos, void *file, unsigned long size)
{
static char line[4096];
int skip = 1;
size_t len = 0;
signed char *p = (signed char *)file + *pos;
char *s = line;
for (; *pos < size ; (*pos)++) {
if (skip && isspace(*p)) {
p++;
continue;
}
skip = 0;
if (*p != '\n' && (*pos < size)) {
len++;
*s++ = *p++;
if (len > 4095)
break; /* Too long, stop */
} else {
/* End of string */
*s = '\0';
return line;
}
}
/* End of buffer */
return NULL;
}
void release_file(void *file, unsigned long size)
static void release_file(void *file, size_t size)
{
munmap(file, size);
}
@ -528,9 +521,8 @@ static int parse_elf(struct elf_info *info, const char *filename)
/* Check if file offset is correct */
if (hdr->e_shoff > info->size) {
fatal("section header offset=%lu in file '%s' is bigger than "
"filesize=%lu\n", (unsigned long)hdr->e_shoff,
filename, info->size);
fatal("section header offset=%lu in file '%s' is bigger than filesize=%zu\n",
(unsigned long)hdr->e_shoff, filename, info->size);
return 0;
}
@ -683,7 +675,7 @@ static void handle_modversion(const struct module *mod,
if (sym->st_shndx == SHN_UNDEF) {
warn("EXPORT symbol \"%s\" [%s%s] version generation failed, symbol will not be versioned.\n",
symname, mod->name, is_vmlinux(mod->name) ? "":".ko");
symname, mod->name, mod->is_vmlinux ? "" : ".ko");
return;
}
@ -705,8 +697,7 @@ static void handle_symbol(struct module *mod, struct elf_info *info,
enum export export;
const char *name;
if ((!is_vmlinux(mod->name) || mod->is_dot_o) &&
strstarts(symname, "__ksymtab"))
if (strstarts(symname, "__ksymtab"))
export = export_from_secname(info, get_secindex(info, sym));
else
export = export_from_sec(info, get_secindex(info, sym));
@ -1752,11 +1743,7 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf,
static unsigned int *reloc_location(struct elf_info *elf,
Elf_Shdr *sechdr, Elf_Rela *r)
{
Elf_Shdr *sechdrs = elf->sechdrs;
int section = sechdr->sh_info;
return (void *)elf->hdr + sechdrs[section].sh_offset +
r->r_offset;
return sym_get_data_by_offset(elf, sechdr->sh_info, r->r_offset);
}
static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
@ -2005,34 +1992,36 @@ static void read_symbols(const char *modname)
if (!parse_elf(&info, modname))
return;
mod = new_module(modname);
{
char *tmp;
/* When there's no vmlinux, don't print warnings about
* unresolved symbols (since there'll be too many ;) */
if (is_vmlinux(modname)) {
have_vmlinux = 1;
mod->skip = 1;
/* strip trailing .o */
tmp = NOFAIL(strdup(modname));
tmp[strlen(tmp) - 2] = '\0';
mod = new_module(tmp);
free(tmp);
}
license = get_modinfo(&info, "license");
if (!license && !is_vmlinux(modname))
warn("missing MODULE_LICENSE() in %s\n"
"see include/linux/module.h for "
"more information\n", modname);
while (license) {
if (license_is_gpl_compatible(license))
mod->gpl_compatible = 1;
else {
mod->gpl_compatible = 0;
break;
if (!mod->is_vmlinux) {
license = get_modinfo(&info, "license");
if (!license)
warn("missing MODULE_LICENSE() in %s\n", modname);
while (license) {
if (license_is_gpl_compatible(license))
mod->gpl_compatible = 1;
else {
mod->gpl_compatible = 0;
break;
}
license = get_next_modinfo(&info, "license", license);
}
license = get_next_modinfo(&info, "license", license);
}
namespace = get_modinfo(&info, "import_ns");
while (namespace) {
add_namespace(&mod->imported_namespaces, namespace);
namespace = get_next_modinfo(&info, "import_ns", namespace);
namespace = get_modinfo(&info, "import_ns");
while (namespace) {
add_namespace(&mod->imported_namespaces, namespace);
namespace = get_next_modinfo(&info, "import_ns",
namespace);
}
}
for (sym = info.symtab_start; sym < info.symtab_stop; sym++) {
@ -2070,16 +2059,14 @@ static void read_symbols(const char *modname)
}
}
if (!is_vmlinux(modname) || vmlinux_section_warnings)
check_sec_ref(mod, modname, &info);
check_sec_ref(mod, modname, &info);
version = get_modinfo(&info, "version");
if (version)
maybe_frob_rcs_version(modname, version, info.modinfo,
version - (char *)info.hdr);
if (version || (all_versions && !is_vmlinux(modname)))
get_src_version(modname, mod->srcversion,
sizeof(mod->srcversion)-1);
if (!mod->is_vmlinux) {
version = get_modinfo(&info, "version");
if (version || all_versions)
get_src_version(modname, mod->srcversion,
sizeof(mod->srcversion) - 1);
}
parse_elf_finish(&info);
@ -2143,20 +2130,18 @@ void buf_write(struct buffer *buf, const char *s, int len)
static void check_for_gpl_usage(enum export exp, const char *m, const char *s)
{
const char *e = is_vmlinux(m) ?"":".ko";
switch (exp) {
case export_gpl:
fatal("GPL-incompatible module %s%s "
"uses GPL-only symbol '%s'\n", m, e, s);
fatal("GPL-incompatible module %s.ko uses GPL-only symbol '%s'\n",
m, s);
break;
case export_unused_gpl:
fatal("GPL-incompatible module %s%s "
"uses GPL-only symbol marked UNUSED '%s'\n", m, e, s);
fatal("GPL-incompatible module %s.ko uses GPL-only symbol marked UNUSED '%s'\n",
m, s);
break;
case export_gpl_future:
warn("GPL-incompatible module %s%s "
"uses future GPL-only symbol '%s'\n", m, e, s);
warn("GPL-incompatible module %s.ko uses future GPL-only symbol '%s'\n",
m, s);
break;
case export_plain:
case export_unused:
@ -2168,13 +2153,11 @@ static void check_for_gpl_usage(enum export exp, const char *m, const char *s)
static void check_for_unused(enum export exp, const char *m, const char *s)
{
const char *e = is_vmlinux(m) ?"":".ko";
switch (exp) {
case export_unused:
case export_unused_gpl:
warn("module %s%s "
"uses symbol '%s' marked UNUSED\n", m, e, s);
warn("module %s.ko uses symbol '%s' marked UNUSED\n",
m, s);
break;
default:
/* ignore */
@ -2349,7 +2332,7 @@ static void add_depends(struct buffer *b, struct module *mod)
/* Clear ->seen flag of modules that own symbols needed by this. */
for (s = mod->unres; s; s = s->next)
if (s->module)
s->module->seen = is_vmlinux(s->module->name);
s->module->seen = s->module->is_vmlinux;
buf_printf(b, "\n");
buf_printf(b, "MODULE_INFO(depends, \"");
@ -2382,6 +2365,25 @@ static void add_srcversion(struct buffer *b, struct module *mod)
}
}
static void write_buf(struct buffer *b, const char *fname)
{
FILE *file;
file = fopen(fname, "w");
if (!file) {
perror(fname);
exit(1);
}
if (fwrite(b->p, 1, b->pos, file) != b->pos) {
perror(fname);
exit(1);
}
if (fclose(file) != 0) {
perror(fname);
exit(1);
}
}
static void write_if_changed(struct buffer *b, const char *fname)
{
char *tmp;
@ -2414,32 +2416,24 @@ static void write_if_changed(struct buffer *b, const char *fname)
close_write:
fclose(file);
write:
file = fopen(fname, "w");
if (!file) {
perror(fname);
exit(1);
}
if (fwrite(b->p, 1, b->pos, file) != b->pos) {
perror(fname);
exit(1);
}
fclose(file);
write_buf(b, fname);
}
/* parse Module.symvers file. line format:
* 0x12345678<tab>symbol<tab>module<tab>export<tab>namespace
**/
static void read_dump(const char *fname, unsigned int kernel)
static void read_dump(const char *fname)
{
unsigned long size, pos = 0;
void *file = grab_file(fname, &size);
char *line;
char *buf, *pos, *line;
if (!file)
buf = read_text_file(fname);
if (!buf)
/* No symbol versions, silently ignore */
return;
while ((line = get_next_line(&pos, file, size))) {
pos = buf;
while ((line = get_line(&pos))) {
char *symname, *namespace, *modname, *d, *export;
unsigned int crc;
struct module *mod;
@ -2463,21 +2457,18 @@ static void read_dump(const char *fname, unsigned int kernel)
goto fail;
mod = find_module(modname);
if (!mod) {
if (is_vmlinux(modname))
have_vmlinux = 1;
mod = new_module(modname);
mod->skip = 1;
mod->from_dump = 1;
}
s = sym_add_exported(symname, mod, export_no(export));
s->kernel = kernel;
s->is_static = 0;
sym_set_crc(symname, crc);
sym_update_namespace(symname, namespace);
}
release_file(file, size);
free(buf);
return;
fail:
release_file(file, size);
free(buf);
fatal("parse error in symbol dump file\n");
}
@ -2489,7 +2480,7 @@ static int dump_sym(struct symbol *sym)
{
if (!external_module)
return 1;
if (sym->vmlinux || sym->kernel)
if (sym->module->from_dump)
return 0;
return 1;
}
@ -2515,7 +2506,7 @@ static void write_dump(const char *fname)
symbol = symbol->next;
}
}
write_if_changed(&buf, fname);
write_buf(&buf, fname);
free(buf.p);
}
@ -2527,7 +2518,7 @@ static void write_namespace_deps_files(const char *fname)
for (mod = modules; mod; mod = mod->next) {
if (mod->skip || !mod->missing_namespaces)
if (mod->from_dump || !mod->missing_namespaces)
continue;
buf_printf(&ns_deps_buf, "%s.ko:", mod->name);
@ -2542,8 +2533,8 @@ static void write_namespace_deps_files(const char *fname)
free(ns_deps_buf.p);
}
struct ext_sym_list {
struct ext_sym_list *next;
struct dump_list {
struct dump_list *next;
const char *file;
};
@ -2551,28 +2542,24 @@ int main(int argc, char **argv)
{
struct module *mod;
struct buffer buf = { };
char *kernel_read = NULL;
char *missing_namespace_deps = NULL;
char *dump_write = NULL, *files_source = NULL;
int opt;
int err;
int n;
struct ext_sym_list *extsym_iter;
struct ext_sym_list *extsym_start = NULL;
struct dump_list *dump_read_start = NULL;
struct dump_list **dump_read_iter = &dump_read_start;
while ((opt = getopt(argc, argv, "i:e:mnsT:o:awENd:")) != -1) {
while ((opt = getopt(argc, argv, "ei:mnT:o:awENd:")) != -1) {
switch (opt) {
case 'i':
kernel_read = optarg;
external_module = 1;
break;
case 'e':
external_module = 1;
extsym_iter =
NOFAIL(malloc(sizeof(*extsym_iter)));
extsym_iter->next = extsym_start;
extsym_iter->file = optarg;
extsym_start = extsym_iter;
break;
case 'i':
*dump_read_iter =
NOFAIL(calloc(1, sizeof(**dump_read_iter)));
(*dump_read_iter)->file = optarg;
dump_read_iter = &(*dump_read_iter)->next;
break;
case 'm':
modversions = 1;
@ -2586,9 +2573,6 @@ int main(int argc, char **argv)
case 'a':
all_versions = 1;
break;
case 's':
vmlinux_section_warnings = 0;
break;
case 'T':
files_source = optarg;
break;
@ -2609,13 +2593,13 @@ int main(int argc, char **argv)
}
}
if (kernel_read)
read_dump(kernel_read, 1);
while (extsym_start) {
read_dump(extsym_start->file, 0);
extsym_iter = extsym_start->next;
free(extsym_start);
extsym_start = extsym_iter;
while (dump_read_start) {
struct dump_list *tmp;
read_dump(dump_read_start->file);
tmp = dump_read_start->next;
free(dump_read_start);
dump_read_start = tmp;
}
while (optind < argc)
@ -2624,12 +2608,19 @@ int main(int argc, char **argv)
if (files_source)
read_symbols_from_files(files_source);
/*
* When there's no vmlinux, don't print warnings about
* unresolved symbols (since there'll be too many ;)
*/
if (!have_vmlinux)
warn("Symbol info of vmlinux is missing. Unresolved symbol check will be entirely skipped.\n");
err = 0;
for (mod = modules; mod; mod = mod->next) {
char fname[PATH_MAX];
if (mod->skip)
if (mod->is_vmlinux || mod->from_dump)
continue;
buf.pos = 0;
@ -2662,13 +2653,6 @@ int main(int argc, char **argv)
struct symbol *s;
for (s = symbolhash[n]; s; s = s->next) {
/*
* Do not check "vmlinux". This avoids the same warnings
* shown twice, and false-positives for ARCH=um.
*/
if (is_vmlinux(s->module->name) && !s->module->is_dot_o)
continue;
if (s->is_static)
warn("\"%s\" [%s] is a static %s\n",
s->name, s->module->name,

19
scripts/mod/modpost.h
View File

@ -111,29 +111,29 @@ buf_write(struct buffer *buf, const char *s, int len);
struct namespace_list {
struct namespace_list *next;
char namespace[0];
char namespace[];
};
struct module {
struct module *next;
const char *name;
int gpl_compatible;
struct symbol *unres;
int from_dump; /* 1 if module was loaded from *.symvers */
int is_vmlinux;
int seen;
int skip;
int has_init;
int has_cleanup;
struct buffer dev_table_buf;
char srcversion[25];
int is_dot_o;
// Missing namespace dependencies
struct namespace_list *missing_namespaces;
// Actual imported namespaces
struct namespace_list *imported_namespaces;
char name[];
};
struct elf_info {
unsigned long size;
size_t size;
Elf_Ehdr *hdr;
Elf_Shdr *sechdrs;
Elf_Sym *symtab_start;
@ -187,16 +187,11 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
void add_moddevtable(struct buffer *buf, struct module *mod);
/* sumversion.c */
void maybe_frob_rcs_version(const char *modfilename,
char *version,
void *modinfo,
unsigned long modinfo_offset);
void get_src_version(const char *modname, char sum[], unsigned sumlen);
/* from modpost.c */
void *grab_file(const char *filename, unsigned long *size);
char* get_next_line(unsigned long *pos, void *file, unsigned long size);
void release_file(void *file, unsigned long size);
char *read_text_file(const char *filename);
char *get_line(char **stringp);
enum loglevel {
LOG_WARN,

117
scripts/mod/sumversion.c
View File

@ -258,9 +258,8 @@ static int parse_file(const char *fname, struct md4_ctx *md)
char *file;
unsigned long i, len;
file = grab_file(fname, &len);
if (!file)
return 0;
file = read_text_file(fname);
len = strlen(file);
for (i = 0; i < len; i++) {
/* Collapse and ignore \ and CR. */
@ -287,7 +286,7 @@ static int parse_file(const char *fname, struct md4_ctx *md)
add_char(file[i], md);
}
release_file(file, len);
free(file);
return 1;
}
/* Check whether the file is a static library or not */
@ -304,9 +303,8 @@ static int is_static_library(const char *objfile)
* to figure out source files. */
static int parse_source_files(const char *objfile, struct md4_ctx *md)
{
char *cmd, *file, *line, *dir;
char *cmd, *file, *line, *dir, *pos;
const char *base;
unsigned long flen, pos = 0;
int dirlen, ret = 0, check_files = 0;
cmd = NOFAIL(malloc(strlen(objfile) + sizeof("..cmd")));
@ -324,14 +322,12 @@ static int parse_source_files(const char *objfile, struct md4_ctx *md)
strncpy(dir, objfile, dirlen);
dir[dirlen] = '\0';
file = grab_file(cmd, &flen);
if (!file) {
warn("could not find %s for %s\n", cmd, objfile);
goto out;
}
file = read_text_file(cmd);
pos = file;
/* Sum all files in the same dir or subdirs. */
while ((line = get_next_line(&pos, file, flen)) != NULL) {
while ((line = get_line(&pos))) {
char* p = line;
if (strncmp(line, "source_", sizeof("source_")-1) == 0) {
@ -382,8 +378,7 @@ static int parse_source_files(const char *objfile, struct md4_ctx *md)
/* Everyone parsed OK */
ret = 1;
out_file:
release_file(file, flen);
out:
free(file);
free(dir);
free(cmd);
return ret;
@ -392,106 +387,34 @@ out:
/* Calc and record src checksum. */
void get_src_version(const char *modname, char sum[], unsigned sumlen)
{
void *file;
unsigned long len;
char *buf, *pos, *firstline;
struct md4_ctx md;
char *sources, *end, *fname;
char *fname;
char filelist[PATH_MAX + 1];
/* objects for a module are listed in the first line of *.mod file. */
snprintf(filelist, sizeof(filelist), "%.*smod",
(int)strlen(modname) - 1, modname);
file = grab_file(filelist, &len);
if (!file)
/* not a module or .mod file missing - ignore */
return;
buf = read_text_file(filelist);
sources = file;
end = strchr(sources, '\n');
if (!end) {
pos = buf;
firstline = get_line(&pos);
if (!firstline) {
warn("bad ending versions file for %s\n", modname);
goto release;
goto free;
}
*end = '\0';
md4_init(&md);
while ((fname = strsep(&sources, " ")) != NULL) {
while ((fname = strsep(&firstline, " "))) {
if (!*fname)
continue;
if (!(is_static_library(fname)) &&
!parse_source_files(fname, &md))
goto release;
goto free;
}
md4_final_ascii(&md, sum, sumlen);
release:
release_file(file, len);
}
static void write_version(const char *filename, const char *sum,
unsigned long offset)
{
int fd;
fd = open(filename, O_RDWR);
if (fd < 0) {
warn("changing sum in %s failed: %s\n",
filename, strerror(errno));
return;
}
if (lseek(fd, offset, SEEK_SET) == (off_t)-1) {
warn("changing sum in %s:%lu failed: %s\n",
filename, offset, strerror(errno));
goto out;
}
if (write(fd, sum, strlen(sum)+1) != strlen(sum)+1) {
warn("writing sum in %s failed: %s\n",
filename, strerror(errno));
goto out;
}
out:
close(fd);
}
static int strip_rcs_crap(char *version)
{
unsigned int len, full_len;
if (strncmp(version, "$Revision", strlen("$Revision")) != 0)
return 0;
/* Space for version string follows. */
full_len = strlen(version) + strlen(version + strlen(version) + 1) + 2;
/* Move string to start with version number: prefix will be
* $Revision$ or $Revision: */
len = strlen("$Revision");
if (version[len] == ':' || version[len] == '$')
len++;
while (isspace(version[len]))
len++;
memmove(version, version+len, full_len-len);
full_len -= len;
/* Preserve up to next whitespace. */
len = 0;
while (version[len] && !isspace(version[len]))
len++;
memmove(version + len, version + strlen(version),
full_len - strlen(version));
return 1;
}
/* Clean up RCS-style version numbers. */
void maybe_frob_rcs_version(const char *modfilename,
char *version,
void *modinfo,
unsigned long version_offset)
{
if (strip_rcs_crap(version))
write_version(modfilename, version, version_offset);
free:
free(buf);
}

16
scripts/modules-check.sh
View File

@ -3,14 +3,24 @@
set -e
if [ $# != 1 ]; then
echo "Usage: $0 <modules.order>" >& 2
exit 1
fi
exit_code=0
# Check uniqueness of module names
check_same_name_modules()
{
for m in $(sed 's:.*/::' modules.order | sort | uniq -d)
for m in $(sed 's:.*/::' $1 | sort | uniq -d)
do
echo "warning: same module names found:" >&2
echo "error: the following would cause module name conflict:" >&2
sed -n "/\/$m/s:^: :p" modules.order >&2
exit_code=1
done
}
check_same_name_modules
check_same_name_modules "$1"
exit $exit_code

6
scripts/package/buildtar
View File

@ -28,15 +28,15 @@ case "${1}" in
opts=
;;
targz-pkg)
opts=--gzip
opts="-I ${_GZIP}"
tarball=${tarball}.gz
;;
tarbz2-pkg)
opts=--bzip2
opts="-I ${_BZIP2}"
tarball=${tarball}.bz2
;;
tarxz-pkg)
opts=--xz
opts="-I ${XZ}"
tarball=${tarball}.xz
;;
*)

2
scripts/xz_wrap.sh
View File

@ -20,4 +20,4 @@ case $SRCARCH in
sparc) BCJ=--sparc ;;
esac
exec xz --check=crc32 $BCJ --lzma2=$LZMA2OPTS,dict=32MiB
exec $XZ --check=crc32 $BCJ --lzma2=$LZMA2OPTS,dict=32MiB

6
usr/include/Makefile
View File

@ -8,7 +8,11 @@
# We cannot go as far as adding -Wpedantic since it emits too many warnings.
UAPI_CFLAGS := -std=c90 -Wall -Werror=implicit-function-declaration
override c_flags = $(UAPI_CFLAGS) -Wp,-MD,$(depfile) -I$(objtree)/usr/include
# In theory, we do not care -m32 or -m64 for header compile tests.
# It is here just because CONFIG_CC_CAN_LINK is tested with -m32 or -m64.
UAPI_CFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS))
override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I$(objtree)/usr/include
# The following are excluded for now because they fail to build.
#