mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 17:23:55 +08:00
d0989d01c6
Various fixes across several hardening areas:
- loadpin: Fix verity target enforcement (Matthias Kaehlcke).
- zero-call-used-regs: Add missing clobbers in paravirt (Bill Wendling).
- CFI: clean up sparc function pointer type mismatches (Bart Van Assche).
- Clang: Adjust compiler flag detection for various Clang changes (Sami
Tolvanen, Kees Cook).
- fortify: Fix warnings in arch-specific code in sh, ARM, and xen.
Improvements to existing features:
- testing: improve overflow KUnit test, introduce fortify KUnit test,
add more coverage to LKDTM tests (Bart Van Assche, Kees Cook).
- overflow: Relax overflow type checking for wider utility.
New features:
- string: Introduce strtomem() and strtomem_pad() to fill a gap in
strncpy() replacement needs.
- um: Enable FORTIFY_SOURCE support.
- fortify: Enable run-time struct member memcpy() overflow warning.
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Merge tag 'hardening-v6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull kernel hardening updates from Kees Cook:
"Most of the collected changes here are fixes across the tree for
various hardening features (details noted below).
The most notable new feature here is the addition of the memcpy()
overflow warning (under CONFIG_FORTIFY_SOURCE), which is the next step
on the path to killing the common class of "trivially detectable"
buffer overflow conditions (i.e. on arrays with sizes known at compile
time) that have resulted in many exploitable vulnerabilities over the
years (e.g. BleedingTooth).
This feature is expected to still have some undiscovered false
positives. It's been in -next for a full development cycle and all the
reported false positives have been fixed in their respective trees.
All the known-bad code patterns we could find with Coccinelle are also
either fixed in their respective trees or in flight.
The commit message in commit 54d9469bc5 ("fortify: Add run-time WARN
for cross-field memcpy()") for the feature has extensive details, but
I'll repeat here that this is a warning _only_, and is not intended to
actually block overflows (yet). The many patches fixing array sizes
and struct members have been landing for several years now, and we're
finally able to turn this on to find any remaining stragglers.
Summary:
Various fixes across several hardening areas:
- loadpin: Fix verity target enforcement (Matthias Kaehlcke).
- zero-call-used-regs: Add missing clobbers in paravirt (Bill
Wendling).
- CFI: clean up sparc function pointer type mismatches (Bart Van
Assche).
- Clang: Adjust compiler flag detection for various Clang changes
(Sami Tolvanen, Kees Cook).
- fortify: Fix warnings in arch-specific code in sh, ARM, and xen.
Improvements to existing features:
- testing: improve overflow KUnit test, introduce fortify KUnit test,
add more coverage to LKDTM tests (Bart Van Assche, Kees Cook).
- overflow: Relax overflow type checking for wider utility.
New features:
- string: Introduce strtomem() and strtomem_pad() to fill a gap in
strncpy() replacement needs.
- um: Enable FORTIFY_SOURCE support.
- fortify: Enable run-time struct member memcpy() overflow warning"
* tag 'hardening-v6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (27 commits)
Makefile.extrawarn: Move -Wcast-function-type-strict to W=1
hardening: Remove Clang's enable flag for -ftrivial-auto-var-init=zero
sparc: Unbreak the build
x86/paravirt: add extra clobbers with ZERO_CALL_USED_REGS enabled
x86/paravirt: clean up typos and grammaros
fortify: Convert to struct vs member helpers
fortify: Explicitly check bounds are compile-time constants
x86/entry: Work around Clang __bdos() bug
ARM: decompressor: Include .data.rel.ro.local
fortify: Adjust KUnit test for modular build
sh: machvec: Use char[] for section boundaries
kunit/memcpy: Avoid pathological compile-time string size
lib: Improve the is_signed_type() kunit test
LoadPin: Require file with verity root digests to have a header
dm: verity-loadpin: Only trust verity targets with enforcement
LoadPin: Fix Kconfig doc about format of file with verity digests
um: Enable FORTIFY_SOURCE
lkdtm: Update tests for memcpy() run-time warnings
fortify: Add run-time WARN for cross-field memcpy()
fortify: Use SIZE_MAX instead of (size_t)-1
...
2128 lines
70 KiB
Makefile
2128 lines
70 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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VERSION = 6
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PATCHLEVEL = 0
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SUBLEVEL = 0
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EXTRAVERSION =
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NAME = Hurr durr I'ma ninja sloth
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# *DOCUMENTATION*
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# To see a list of typical targets execute "make help"
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# More info can be located in ./README
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# Comments in this file are targeted only to the developer, do not
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# expect to learn how to build the kernel reading this file.
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$(if $(filter __%, $(MAKECMDGOALS)), \
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$(error targets prefixed with '__' are only for internal use))
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# That's our default target when none is given on the command line
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PHONY := __all
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__all:
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# We are using a recursive build, so we need to do a little thinking
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# to get the ordering right.
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#
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# Most importantly: sub-Makefiles should only ever modify files in
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# their own directory. If in some directory we have a dependency on
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# a file in another dir (which doesn't happen often, but it's often
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# unavoidable when linking the built-in.a targets which finally
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# turn into vmlinux), we will call a sub make in that other dir, and
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# after that we are sure that everything which is in that other dir
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# is now up to date.
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#
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# The only cases where we need to modify files which have global
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# effects are thus separated out and done before the recursive
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# descending is started. They are now explicitly listed as the
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# prepare rule.
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ifneq ($(sub_make_done),1)
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# Do not use make's built-in rules and variables
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# (this increases performance and avoids hard-to-debug behaviour)
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MAKEFLAGS += -rR
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# Avoid funny character set dependencies
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unexport LC_ALL
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LC_COLLATE=C
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LC_NUMERIC=C
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export LC_COLLATE LC_NUMERIC
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|
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# Avoid interference with shell env settings
|
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unexport GREP_OPTIONS
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|
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# Beautify output
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# ---------------------------------------------------------------------------
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#
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# Normally, we echo the whole command before executing it. By making
|
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# that echo $($(quiet)$(cmd)), we now have the possibility to set
|
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# $(quiet) to choose other forms of output instead, e.g.
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#
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# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
|
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# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
|
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#
|
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# If $(quiet) is empty, the whole command will be printed.
|
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# If it is set to "quiet_", only the short version will be printed.
|
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# If it is set to "silent_", nothing will be printed at all, since
|
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# the variable $(silent_cmd_cc_o_c) doesn't exist.
|
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#
|
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# A simple variant is to prefix commands with $(Q) - that's useful
|
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# for commands that shall be hidden in non-verbose mode.
|
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#
|
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# $(Q)ln $@ :<
|
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#
|
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# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
|
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# If KBUILD_VERBOSE equals 1 then the above command is displayed.
|
|
# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
|
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#
|
|
# To put more focus on warnings, be less verbose as default
|
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# Use 'make V=1' to see the full commands
|
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|
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ifeq ("$(origin V)", "command line")
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KBUILD_VERBOSE = $(V)
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endif
|
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ifndef KBUILD_VERBOSE
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KBUILD_VERBOSE = 0
|
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endif
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|
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ifeq ($(KBUILD_VERBOSE),1)
|
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quiet =
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Q =
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else
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quiet=quiet_
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Q = @
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endif
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|
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# If the user is running make -s (silent mode), suppress echoing of
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# commands
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ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
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quiet=silent_
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KBUILD_VERBOSE = 0
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endif
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export quiet Q KBUILD_VERBOSE
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|
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# Call a source code checker (by default, "sparse") as part of the
|
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# C compilation.
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#
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# Use 'make C=1' to enable checking of only re-compiled files.
|
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# Use 'make C=2' to enable checking of *all* source files, regardless
|
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# of whether they are re-compiled or not.
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#
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# See the file "Documentation/dev-tools/sparse.rst" for more details,
|
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# including where to get the "sparse" utility.
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|
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ifeq ("$(origin C)", "command line")
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KBUILD_CHECKSRC = $(C)
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endif
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ifndef KBUILD_CHECKSRC
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KBUILD_CHECKSRC = 0
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endif
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export KBUILD_CHECKSRC
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# Enable "clippy" (a linter) as part of the Rust compilation.
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#
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# Use 'make CLIPPY=1' to enable it.
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ifeq ("$(origin CLIPPY)", "command line")
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KBUILD_CLIPPY := $(CLIPPY)
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endif
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export KBUILD_CLIPPY
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|
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# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
|
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# directory of external module to build. Setting M= takes precedence.
|
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ifeq ("$(origin M)", "command line")
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KBUILD_EXTMOD := $(M)
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endif
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$(if $(word 2, $(KBUILD_EXTMOD)), \
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$(error building multiple external modules is not supported))
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$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \
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$(error module directory path cannot contain '$x')))
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|
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# Remove trailing slashes
|
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ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
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KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
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endif
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export KBUILD_EXTMOD
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|
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# Kbuild will save output files in the current working directory.
|
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# This does not need to match to the root of the kernel source tree.
|
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#
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# For example, you can do this:
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#
|
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# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
|
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#
|
|
# If you want to save output files in a different location, there are
|
|
# two syntaxes to specify it.
|
|
#
|
|
# 1) O=
|
|
# Use "make O=dir/to/store/output/files/"
|
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#
|
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# 2) Set KBUILD_OUTPUT
|
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# Set the environment variable KBUILD_OUTPUT to point to the output directory.
|
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# export KBUILD_OUTPUT=dir/to/store/output/files/; make
|
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#
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# The O= assignment takes precedence over the KBUILD_OUTPUT environment
|
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# variable.
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|
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# Do we want to change the working directory?
|
|
ifeq ("$(origin O)", "command line")
|
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KBUILD_OUTPUT := $(O)
|
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endif
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|
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ifneq ($(KBUILD_OUTPUT),)
|
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# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
|
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# expand a shell special character '~'. We use a somewhat tedious way here.
|
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abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
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$(if $(abs_objtree),, \
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$(error failed to create output directory "$(KBUILD_OUTPUT)"))
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|
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# $(realpath ...) resolves symlinks
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abs_objtree := $(realpath $(abs_objtree))
|
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else
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abs_objtree := $(CURDIR)
|
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endif # ifneq ($(KBUILD_OUTPUT),)
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ifeq ($(abs_objtree),$(CURDIR))
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# Suppress "Entering directory ..." unless we are changing the work directory.
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MAKEFLAGS += --no-print-directory
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else
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need-sub-make := 1
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endif
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this-makefile := $(lastword $(MAKEFILE_LIST))
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abs_srctree := $(realpath $(dir $(this-makefile)))
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|
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ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
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$(error source directory cannot contain spaces or colons)
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endif
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ifneq ($(abs_srctree),$(abs_objtree))
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# Look for make include files relative to root of kernel src
|
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#
|
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# --included-dir is added for backward compatibility, but you should not rely on
|
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# it. Please add $(srctree)/ prefix to include Makefiles in the source tree.
|
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MAKEFLAGS += --include-dir=$(abs_srctree)
|
|
endif
|
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|
|
ifneq ($(filter 3.%,$(MAKE_VERSION)),)
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# '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.
|
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need-sub-make := 1
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# Cancel implicit rules for this Makefile.
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$(this-makefile): ;
|
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endif
|
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|
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export abs_srctree abs_objtree
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export sub_make_done := 1
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|
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ifeq ($(need-sub-make),1)
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PHONY += $(MAKECMDGOALS) __sub-make
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|
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$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
|
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@:
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|
|
# Invoke a second make in the output directory, passing relevant variables
|
|
__sub-make:
|
|
$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
|
|
|
|
endif # need-sub-make
|
|
endif # sub_make_done
|
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|
|
# We process the rest of the Makefile if this is the final invocation of make
|
|
ifeq ($(need-sub-make),)
|
|
|
|
# Do not print "Entering directory ...",
|
|
# but we want to display it when entering to the output directory
|
|
# so that IDEs/editors are able to understand relative filenames.
|
|
MAKEFLAGS += --no-print-directory
|
|
|
|
ifeq ($(abs_srctree),$(abs_objtree))
|
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# building in the source tree
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|
srctree := .
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|
building_out_of_srctree :=
|
|
else
|
|
ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
|
|
# building in a subdirectory of the source tree
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|
srctree := ..
|
|
else
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|
srctree := $(abs_srctree)
|
|
endif
|
|
building_out_of_srctree := 1
|
|
endif
|
|
|
|
ifneq ($(KBUILD_ABS_SRCTREE),)
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srctree := $(abs_srctree)
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|
endif
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|
objtree := .
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|
VPATH := $(srctree)
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|
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export building_out_of_srctree srctree objtree VPATH
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|
|
# To make sure we do not include .config for any of the *config targets
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# catch them early, and hand them over to scripts/kconfig/Makefile
|
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# It is allowed to specify more targets when calling make, including
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# mixing *config targets and build targets.
|
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# For example 'make oldconfig all'.
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|
# Detect when mixed targets is specified, and make a second invocation
|
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# of make so .config is not included in this case either (for *config).
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version_h := include/generated/uapi/linux/version.h
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|
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clean-targets := %clean mrproper cleandocs
|
|
no-dot-config-targets := $(clean-targets) \
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|
cscope gtags TAGS tags help% %docs check% coccicheck \
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|
$(version_h) headers headers_% archheaders archscripts \
|
|
%asm-generic kernelversion %src-pkg dt_binding_check \
|
|
outputmakefile rustavailable rustfmt rustfmtcheck
|
|
# Installation targets should not require compiler. Unfortunately, vdso_install
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|
# is an exception where build artifacts may be updated. This must be fixed.
|
|
no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
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headers_install modules_install kernelrelease image_name
|
|
no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
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image_name
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|
single-targets := %.a %.i %.rsi %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
|
|
|
|
config-build :=
|
|
mixed-build :=
|
|
need-config := 1
|
|
need-compiler := 1
|
|
may-sync-config := 1
|
|
single-build :=
|
|
|
|
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
|
|
ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
|
|
need-config :=
|
|
endif
|
|
endif
|
|
|
|
ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
|
|
ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
|
|
need-compiler :=
|
|
endif
|
|
endif
|
|
|
|
ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
|
|
ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
|
|
may-sync-config :=
|
|
endif
|
|
endif
|
|
|
|
ifneq ($(KBUILD_EXTMOD),)
|
|
may-sync-config :=
|
|
endif
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
ifneq ($(filter %config,$(MAKECMDGOALS)),)
|
|
config-build := 1
|
|
ifneq ($(words $(MAKECMDGOALS)),1)
|
|
mixed-build := 1
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
# We cannot build single targets and the others at the same time
|
|
ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
|
|
single-build := 1
|
|
ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
|
|
mixed-build := 1
|
|
endif
|
|
endif
|
|
|
|
# For "make -j clean all", "make -j mrproper defconfig all", etc.
|
|
ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
|
|
ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
|
|
mixed-build := 1
|
|
endif
|
|
endif
|
|
|
|
# install and modules_install need also be processed one by one
|
|
ifneq ($(filter install,$(MAKECMDGOALS)),)
|
|
ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
|
|
mixed-build := 1
|
|
endif
|
|
endif
|
|
|
|
ifdef mixed-build
|
|
# ===========================================================================
|
|
# We're called with mixed targets (*config and build targets).
|
|
# Handle them one by one.
|
|
|
|
PHONY += $(MAKECMDGOALS) __build_one_by_one
|
|
|
|
$(MAKECMDGOALS): __build_one_by_one
|
|
@:
|
|
|
|
__build_one_by_one:
|
|
$(Q)set -e; \
|
|
for i in $(MAKECMDGOALS); do \
|
|
$(MAKE) -f $(srctree)/Makefile $$i; \
|
|
done
|
|
|
|
else # !mixed-build
|
|
|
|
include $(srctree)/scripts/Kbuild.include
|
|
|
|
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
|
|
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
|
|
KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
|
|
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
|
|
|
|
include $(srctree)/scripts/subarch.include
|
|
|
|
# Cross compiling and selecting different set of gcc/bin-utils
|
|
# ---------------------------------------------------------------------------
|
|
#
|
|
# When performing cross compilation for other architectures ARCH shall be set
|
|
# to the target architecture. (See arch/* for the possibilities).
|
|
# ARCH can be set during invocation of make:
|
|
# make ARCH=ia64
|
|
# Another way is to have ARCH set in the environment.
|
|
# The default ARCH is the host where make is executed.
|
|
|
|
# CROSS_COMPILE specify the prefix used for all executables used
|
|
# during compilation. Only gcc and related bin-utils executables
|
|
# are prefixed with $(CROSS_COMPILE).
|
|
# CROSS_COMPILE can be set on the command line
|
|
# make CROSS_COMPILE=ia64-linux-
|
|
# Alternatively CROSS_COMPILE can be set in the environment.
|
|
# Default value for CROSS_COMPILE is not to prefix executables
|
|
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
|
|
ARCH ?= $(SUBARCH)
|
|
|
|
# Architecture as present in compile.h
|
|
UTS_MACHINE := $(ARCH)
|
|
SRCARCH := $(ARCH)
|
|
|
|
# Additional ARCH settings for x86
|
|
ifeq ($(ARCH),i386)
|
|
SRCARCH := x86
|
|
endif
|
|
ifeq ($(ARCH),x86_64)
|
|
SRCARCH := x86
|
|
endif
|
|
|
|
# Additional ARCH settings for sparc
|
|
ifeq ($(ARCH),sparc32)
|
|
SRCARCH := sparc
|
|
endif
|
|
ifeq ($(ARCH),sparc64)
|
|
SRCARCH := sparc
|
|
endif
|
|
|
|
# Additional ARCH settings for parisc
|
|
ifeq ($(ARCH),parisc64)
|
|
SRCARCH := parisc
|
|
endif
|
|
|
|
export cross_compiling :=
|
|
ifneq ($(SRCARCH),$(SUBARCH))
|
|
cross_compiling := 1
|
|
endif
|
|
|
|
KCONFIG_CONFIG ?= .config
|
|
export KCONFIG_CONFIG
|
|
|
|
# SHELL used by kbuild
|
|
CONFIG_SHELL := sh
|
|
|
|
HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
|
|
HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
|
|
HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
|
|
|
|
ifneq ($(LLVM),)
|
|
ifneq ($(filter %/,$(LLVM)),)
|
|
LLVM_PREFIX := $(LLVM)
|
|
else ifneq ($(filter -%,$(LLVM)),)
|
|
LLVM_SUFFIX := $(LLVM)
|
|
endif
|
|
|
|
HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
|
|
HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)
|
|
else
|
|
HOSTCC = gcc
|
|
HOSTCXX = g++
|
|
endif
|
|
HOSTRUSTC = rustc
|
|
HOSTPKG_CONFIG = pkg-config
|
|
|
|
KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
|
|
-O2 -fomit-frame-pointer -std=gnu11 \
|
|
-Wdeclaration-after-statement
|
|
KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
|
|
KBUILD_USERLDFLAGS := $(USERLDFLAGS)
|
|
|
|
# These flags apply to all Rust code in the tree, including the kernel and
|
|
# host programs.
|
|
export rust_common_flags := --edition=2021 \
|
|
-Zbinary_dep_depinfo=y \
|
|
-Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \
|
|
-Dunreachable_pub -Dnon_ascii_idents \
|
|
-Wmissing_docs \
|
|
-Drustdoc::missing_crate_level_docs \
|
|
-Dclippy::correctness -Dclippy::style \
|
|
-Dclippy::suspicious -Dclippy::complexity \
|
|
-Dclippy::perf \
|
|
-Dclippy::let_unit_value -Dclippy::mut_mut \
|
|
-Dclippy::needless_bitwise_bool \
|
|
-Dclippy::needless_continue \
|
|
-Wclippy::dbg_macro
|
|
|
|
KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
|
|
KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
|
|
KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \
|
|
-Zallow-features= $(HOSTRUSTFLAGS)
|
|
KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
|
|
KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
|
|
|
|
# Make variables (CC, etc...)
|
|
CPP = $(CC) -E
|
|
ifneq ($(LLVM),)
|
|
CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
|
|
LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
|
|
AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
|
|
NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX)
|
|
OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX)
|
|
OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX)
|
|
READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX)
|
|
STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
|
|
else
|
|
CC = $(CROSS_COMPILE)gcc
|
|
LD = $(CROSS_COMPILE)ld
|
|
AR = $(CROSS_COMPILE)ar
|
|
NM = $(CROSS_COMPILE)nm
|
|
OBJCOPY = $(CROSS_COMPILE)objcopy
|
|
OBJDUMP = $(CROSS_COMPILE)objdump
|
|
READELF = $(CROSS_COMPILE)readelf
|
|
STRIP = $(CROSS_COMPILE)strip
|
|
endif
|
|
RUSTC = rustc
|
|
RUSTDOC = rustdoc
|
|
RUSTFMT = rustfmt
|
|
CLIPPY_DRIVER = clippy-driver
|
|
BINDGEN = bindgen
|
|
CARGO = cargo
|
|
PAHOLE = pahole
|
|
RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
|
|
LEX = flex
|
|
YACC = bison
|
|
AWK = awk
|
|
INSTALLKERNEL := installkernel
|
|
DEPMOD = depmod
|
|
PERL = perl
|
|
PYTHON3 = python3
|
|
CHECK = sparse
|
|
BASH = bash
|
|
KGZIP = gzip
|
|
KBZIP2 = bzip2
|
|
KLZOP = lzop
|
|
LZMA = lzma
|
|
LZ4 = lz4c
|
|
XZ = xz
|
|
ZSTD = zstd
|
|
|
|
PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
|
|
|
|
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
|
|
-Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
|
|
NOSTDINC_FLAGS :=
|
|
CFLAGS_MODULE =
|
|
RUSTFLAGS_MODULE =
|
|
AFLAGS_MODULE =
|
|
LDFLAGS_MODULE =
|
|
CFLAGS_KERNEL =
|
|
RUSTFLAGS_KERNEL =
|
|
AFLAGS_KERNEL =
|
|
LDFLAGS_vmlinux =
|
|
|
|
# Use USERINCLUDE when you must reference the UAPI directories only.
|
|
USERINCLUDE := \
|
|
-I$(srctree)/arch/$(SRCARCH)/include/uapi \
|
|
-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
|
|
-I$(srctree)/include/uapi \
|
|
-I$(objtree)/include/generated/uapi \
|
|
-include $(srctree)/include/linux/compiler-version.h \
|
|
-include $(srctree)/include/linux/kconfig.h
|
|
|
|
# Use LINUXINCLUDE when you must reference the include/ directory.
|
|
# Needed to be compatible with the O= option
|
|
LINUXINCLUDE := \
|
|
-I$(srctree)/arch/$(SRCARCH)/include \
|
|
-I$(objtree)/arch/$(SRCARCH)/include/generated \
|
|
$(if $(building_out_of_srctree),-I$(srctree)/include) \
|
|
-I$(objtree)/include \
|
|
$(USERINCLUDE)
|
|
|
|
KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
|
|
KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
|
|
-fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
|
|
-Werror=implicit-function-declaration -Werror=implicit-int \
|
|
-Werror=return-type -Wno-format-security \
|
|
-std=gnu11
|
|
KBUILD_CPPFLAGS := -D__KERNEL__
|
|
KBUILD_RUSTFLAGS := $(rust_common_flags) \
|
|
--target=$(objtree)/rust/target.json \
|
|
-Cpanic=abort -Cembed-bitcode=n -Clto=n \
|
|
-Cforce-unwind-tables=n -Ccodegen-units=1 \
|
|
-Csymbol-mangling-version=v0 \
|
|
-Crelocation-model=static \
|
|
-Zfunction-sections=n \
|
|
-Dclippy::float_arithmetic
|
|
|
|
KBUILD_AFLAGS_KERNEL :=
|
|
KBUILD_CFLAGS_KERNEL :=
|
|
KBUILD_RUSTFLAGS_KERNEL :=
|
|
KBUILD_AFLAGS_MODULE := -DMODULE
|
|
KBUILD_CFLAGS_MODULE := -DMODULE
|
|
KBUILD_RUSTFLAGS_MODULE := --cfg MODULE
|
|
KBUILD_LDFLAGS_MODULE :=
|
|
KBUILD_LDFLAGS :=
|
|
CLANG_FLAGS :=
|
|
|
|
ifeq ($(KBUILD_CLIPPY),1)
|
|
RUSTC_OR_CLIPPY_QUIET := CLIPPY
|
|
RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)
|
|
else
|
|
RUSTC_OR_CLIPPY_QUIET := RUSTC
|
|
RUSTC_OR_CLIPPY = $(RUSTC)
|
|
endif
|
|
|
|
ifdef RUST_LIB_SRC
|
|
export RUST_LIB_SRC
|
|
endif
|
|
|
|
# Allows the usage of unstable features in stable compilers.
|
|
export RUSTC_BOOTSTRAP := 1
|
|
|
|
export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
|
|
export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO
|
|
export HOSTRUSTC KBUILD_HOSTRUSTFLAGS
|
|
export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
|
|
export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
|
|
export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
|
|
export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
|
|
export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
|
|
|
|
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
|
|
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
|
|
export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE
|
|
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
|
|
export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE
|
|
export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
|
|
export PAHOLE_FLAGS
|
|
|
|
# Files to ignore in find ... statements
|
|
|
|
export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
|
|
-name CVS -o -name .pc -o -name .hg -o -name .git \) \
|
|
-prune -o
|
|
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
|
|
--exclude CVS --exclude .pc --exclude .hg --exclude .git
|
|
|
|
# ===========================================================================
|
|
# Rules shared between *config targets and build targets
|
|
|
|
# Basic helpers built in scripts/basic/
|
|
PHONY += scripts_basic
|
|
scripts_basic:
|
|
$(Q)$(MAKE) $(build)=scripts/basic
|
|
|
|
PHONY += outputmakefile
|
|
ifdef building_out_of_srctree
|
|
# Before starting out-of-tree build, make sure the source tree is clean.
|
|
# outputmakefile generates a Makefile in the output directory, if using a
|
|
# separate output directory. This allows convenient use of make in the
|
|
# output directory.
|
|
# At the same time when output Makefile generated, generate .gitignore to
|
|
# ignore whole output directory
|
|
|
|
quiet_cmd_makefile = GEN Makefile
|
|
cmd_makefile = { \
|
|
echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
|
|
echo "include $(srctree)/Makefile"; \
|
|
} > Makefile
|
|
|
|
outputmakefile:
|
|
$(Q)if [ -f $(srctree)/.config -o \
|
|
-d $(srctree)/include/config -o \
|
|
-d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
|
|
echo >&2 "***"; \
|
|
echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
|
|
echo >&2 "*** in $(abs_srctree)";\
|
|
echo >&2 "***"; \
|
|
false; \
|
|
fi
|
|
$(Q)ln -fsn $(srctree) source
|
|
$(call cmd,makefile)
|
|
$(Q)test -e .gitignore || \
|
|
{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
|
|
endif
|
|
|
|
# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
|
|
# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
|
|
# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
|
|
# and from include/config/auto.conf.cmd to detect the compiler upgrade.
|
|
CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
|
|
|
|
ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
|
|
include $(srctree)/scripts/Makefile.clang
|
|
endif
|
|
|
|
# Include this also for config targets because some architectures need
|
|
# cc-cross-prefix to determine CROSS_COMPILE.
|
|
ifdef need-compiler
|
|
include $(srctree)/scripts/Makefile.compiler
|
|
endif
|
|
|
|
ifdef config-build
|
|
# ===========================================================================
|
|
# *config targets only - make sure prerequisites are updated, and descend
|
|
# in scripts/kconfig to make the *config target
|
|
|
|
# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
|
|
# KBUILD_DEFCONFIG may point out an alternative default configuration
|
|
# used for 'make defconfig'
|
|
include $(srctree)/arch/$(SRCARCH)/Makefile
|
|
export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
|
|
|
|
config: outputmakefile scripts_basic FORCE
|
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@
|
|
|
|
%config: outputmakefile scripts_basic FORCE
|
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@
|
|
|
|
else #!config-build
|
|
# ===========================================================================
|
|
# Build targets only - this includes vmlinux, arch specific targets, clean
|
|
# targets and others. In general all targets except *config targets.
|
|
|
|
# If building an external module we do not care about the all: rule
|
|
# but instead __all depend on modules
|
|
PHONY += all
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
__all: all
|
|
else
|
|
__all: modules
|
|
endif
|
|
|
|
# Decide whether to build built-in, modular, or both.
|
|
# Normally, just do built-in.
|
|
|
|
KBUILD_MODULES :=
|
|
KBUILD_BUILTIN := 1
|
|
|
|
# If we have only "make modules", don't compile built-in objects.
|
|
ifeq ($(MAKECMDGOALS),modules)
|
|
KBUILD_BUILTIN :=
|
|
endif
|
|
|
|
# If we have "make <whatever> modules", compile modules
|
|
# in addition to whatever we do anyway.
|
|
# Just "make" or "make all" shall build modules as well
|
|
|
|
ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
|
|
KBUILD_MODULES := 1
|
|
endif
|
|
|
|
ifeq ($(MAKECMDGOALS),)
|
|
KBUILD_MODULES := 1
|
|
endif
|
|
|
|
export KBUILD_MODULES KBUILD_BUILTIN
|
|
|
|
ifdef need-config
|
|
include include/config/auto.conf
|
|
endif
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
# Objects we will link into vmlinux / subdirs we need to visit
|
|
core-y := init/ usr/ arch/$(SRCARCH)/
|
|
drivers-y := drivers/ sound/
|
|
drivers-$(CONFIG_SAMPLES) += samples/
|
|
drivers-$(CONFIG_NET) += net/
|
|
drivers-y += virt/
|
|
libs-y := lib/
|
|
endif # KBUILD_EXTMOD
|
|
|
|
# The all: target is the default when no target is given on the
|
|
# command line.
|
|
# This allow a user to issue only 'make' to build a kernel including modules
|
|
# Defaults to vmlinux, but the arch makefile usually adds further targets
|
|
all: vmlinux
|
|
|
|
CFLAGS_GCOV := -fprofile-arcs -ftest-coverage
|
|
ifdef CONFIG_CC_IS_GCC
|
|
CFLAGS_GCOV += -fno-tree-loop-im
|
|
endif
|
|
export CFLAGS_GCOV
|
|
|
|
# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
CC_FLAGS_FTRACE := -pg
|
|
endif
|
|
|
|
include $(srctree)/arch/$(SRCARCH)/Makefile
|
|
|
|
ifdef need-config
|
|
ifdef may-sync-config
|
|
# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
|
|
# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
|
|
# because some architectures define CROSS_COMPILE there.
|
|
include include/config/auto.conf.cmd
|
|
|
|
$(KCONFIG_CONFIG):
|
|
@echo >&2 '***'
|
|
@echo >&2 '*** Configuration file "$@" not found!'
|
|
@echo >&2 '***'
|
|
@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
|
|
@echo >&2 '*** "make menuconfig" or "make xconfig").'
|
|
@echo >&2 '***'
|
|
@/bin/false
|
|
|
|
# The actual configuration files used during the build are stored in
|
|
# include/generated/ and include/config/. Update them if .config is newer than
|
|
# include/config/auto.conf (which mirrors .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)
|
|
#
|
|
# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
|
|
# so you cannot notice that Kconfig is waiting for the user input.
|
|
%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG)
|
|
$(Q)$(kecho) " SYNC $@"
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
|
|
else # !may-sync-config
|
|
# External modules and some install targets need include/generated/autoconf.h
|
|
# and include/config/auto.conf but do not care if they are up-to-date.
|
|
# Use auto.conf to trigger the test
|
|
PHONY += include/config/auto.conf
|
|
|
|
include/config/auto.conf:
|
|
$(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
|
|
echo >&2; \
|
|
echo >&2 " ERROR: Kernel configuration is invalid."; \
|
|
echo >&2 " include/generated/autoconf.h or $@ are missing.";\
|
|
echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
|
|
echo >&2 ; \
|
|
/bin/false)
|
|
|
|
endif # may-sync-config
|
|
endif # need-config
|
|
|
|
KBUILD_CFLAGS += -fno-delete-null-pointer-checks
|
|
KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
|
|
|
|
ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
|
|
KBUILD_CFLAGS += -O2
|
|
KBUILD_RUSTFLAGS += -Copt-level=2
|
|
else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
|
|
KBUILD_CFLAGS += -Os
|
|
KBUILD_RUSTFLAGS += -Copt-level=s
|
|
endif
|
|
|
|
# Always set `debug-assertions` and `overflow-checks` because their default
|
|
# depends on `opt-level` and `debug-assertions`, respectively.
|
|
KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
|
|
KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n)
|
|
|
|
# Tell gcc to never replace conditional load with a non-conditional one
|
|
ifdef CONFIG_CC_IS_GCC
|
|
# gcc-10 renamed --param=allow-store-data-races=0 to
|
|
# -fno-allow-store-data-races.
|
|
KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
|
|
endif
|
|
|
|
ifdef CONFIG_READABLE_ASM
|
|
# Disable optimizations that make assembler listings hard to read.
|
|
# reorder blocks reorders the control in the function
|
|
# ipa clone creates specialized cloned functions
|
|
# partial inlining inlines only parts of functions
|
|
KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
|
|
endif
|
|
|
|
ifneq ($(CONFIG_FRAME_WARN),0)
|
|
KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
|
|
endif
|
|
|
|
stackp-flags-y := -fno-stack-protector
|
|
stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
|
|
stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
|
|
|
|
KBUILD_CFLAGS += $(stackp-flags-y)
|
|
|
|
KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
|
|
KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
|
|
KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
|
|
|
|
KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
|
|
KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
|
|
|
|
ifdef CONFIG_CC_IS_CLANG
|
|
KBUILD_CPPFLAGS += -Qunused-arguments
|
|
# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable.
|
|
KBUILD_CFLAGS += -Wno-gnu
|
|
else
|
|
|
|
# gcc inanely warns about local variables called 'main'
|
|
KBUILD_CFLAGS += -Wno-main
|
|
endif
|
|
|
|
# These warnings generated too much noise in a regular build.
|
|
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
|
|
|
|
# These result in bogus false positives
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
|
|
|
|
ifdef CONFIG_FRAME_POINTER
|
|
KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
|
|
KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y
|
|
else
|
|
# Some targets (ARM with Thumb2, for example), can't be built with frame
|
|
# pointers. For those, we don't have FUNCTION_TRACER automatically
|
|
# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
|
|
# incompatible with -fomit-frame-pointer with current GCC, so we don't use
|
|
# -fomit-frame-pointer with FUNCTION_TRACER.
|
|
# In the Rust target specification, "frame-pointer" is set explicitly
|
|
# to "may-omit".
|
|
ifndef CONFIG_FUNCTION_TRACER
|
|
KBUILD_CFLAGS += -fomit-frame-pointer
|
|
endif
|
|
endif
|
|
|
|
# Initialize all stack variables with a 0xAA pattern.
|
|
ifdef CONFIG_INIT_STACK_ALL_PATTERN
|
|
KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
|
|
endif
|
|
|
|
# Initialize all stack variables with a zero value.
|
|
ifdef CONFIG_INIT_STACK_ALL_ZERO
|
|
KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
|
|
ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
|
|
# https://github.com/llvm/llvm-project/issues/44842
|
|
KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
|
|
endif
|
|
endif
|
|
|
|
# While VLAs have been removed, GCC produces unreachable stack probes
|
|
# for the randomize_kstack_offset feature. Disable it for all compilers.
|
|
KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection)
|
|
|
|
# Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
|
|
ifdef CONFIG_ZERO_CALL_USED_REGS
|
|
KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr
|
|
endif
|
|
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
ifdef CONFIG_FTRACE_MCOUNT_USE_CC
|
|
CC_FLAGS_FTRACE += -mrecord-mcount
|
|
ifdef CONFIG_HAVE_NOP_MCOUNT
|
|
ifeq ($(call cc-option-yn, -mnop-mcount),y)
|
|
CC_FLAGS_FTRACE += -mnop-mcount
|
|
CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
|
|
endif
|
|
endif
|
|
endif
|
|
ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
|
|
CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
|
|
endif
|
|
ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
|
|
ifdef CONFIG_HAVE_C_RECORDMCOUNT
|
|
BUILD_C_RECORDMCOUNT := y
|
|
export BUILD_C_RECORDMCOUNT
|
|
endif
|
|
endif
|
|
ifdef CONFIG_HAVE_FENTRY
|
|
# s390-linux-gnu-gcc did not support -mfentry until gcc-9.
|
|
ifeq ($(call cc-option-yn, -mfentry),y)
|
|
CC_FLAGS_FTRACE += -mfentry
|
|
CC_FLAGS_USING += -DCC_USING_FENTRY
|
|
endif
|
|
endif
|
|
export CC_FLAGS_FTRACE
|
|
KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
|
|
KBUILD_AFLAGS += $(CC_FLAGS_USING)
|
|
endif
|
|
|
|
# We trigger additional mismatches with less inlining
|
|
ifdef CONFIG_DEBUG_SECTION_MISMATCH
|
|
KBUILD_CFLAGS += -fno-inline-functions-called-once
|
|
endif
|
|
|
|
# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0).
|
|
ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
|
|
KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
|
|
KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y
|
|
LDFLAGS_vmlinux += --gc-sections
|
|
endif
|
|
|
|
ifdef CONFIG_SHADOW_CALL_STACK
|
|
CC_FLAGS_SCS := -fsanitize=shadow-call-stack
|
|
KBUILD_CFLAGS += $(CC_FLAGS_SCS)
|
|
export CC_FLAGS_SCS
|
|
endif
|
|
|
|
ifdef CONFIG_LTO_CLANG
|
|
ifdef CONFIG_LTO_CLANG_THIN
|
|
CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit
|
|
KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
|
|
else
|
|
CC_FLAGS_LTO := -flto
|
|
endif
|
|
CC_FLAGS_LTO += -fvisibility=hidden
|
|
|
|
# Limit inlining across translation units to reduce binary size
|
|
KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
|
|
|
|
# Check for frame size exceeding threshold during prolog/epilog insertion
|
|
# when using lld < 13.0.0.
|
|
ifneq ($(CONFIG_FRAME_WARN),0)
|
|
ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
|
|
KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
ifdef CONFIG_LTO
|
|
KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)
|
|
KBUILD_AFLAGS += -fno-lto
|
|
export CC_FLAGS_LTO
|
|
endif
|
|
|
|
ifdef CONFIG_CFI_CLANG
|
|
CC_FLAGS_CFI := -fsanitize=kcfi
|
|
KBUILD_CFLAGS += $(CC_FLAGS_CFI)
|
|
export CC_FLAGS_CFI
|
|
endif
|
|
|
|
ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B
|
|
KBUILD_CFLAGS += -falign-functions=64
|
|
endif
|
|
|
|
# arch Makefile may override CC so keep this after arch Makefile is included
|
|
NOSTDINC_FLAGS += -nostdinc
|
|
|
|
# warn about C99 declaration after statement
|
|
KBUILD_CFLAGS += -Wdeclaration-after-statement
|
|
|
|
# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
|
|
KBUILD_CFLAGS += -Wvla
|
|
|
|
# disable pointer signed / unsigned warnings in gcc 4.0
|
|
KBUILD_CFLAGS += -Wno-pointer-sign
|
|
|
|
# In order to make sure new function cast mismatches are not introduced
|
|
# in the kernel (to avoid tripping CFI checking), the kernel should be
|
|
# globally built with -Wcast-function-type.
|
|
KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type)
|
|
|
|
# disable stringop warnings in gcc 8+
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
|
|
|
|
# We'll want to enable this eventually, but it's not going away for 5.7 at least
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
|
|
|
|
# Another good warning that we'll want to enable eventually
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
|
|
|
|
# Enabled with W=2, disabled by default as noisy
|
|
ifdef CONFIG_CC_IS_GCC
|
|
KBUILD_CFLAGS += -Wno-maybe-uninitialized
|
|
endif
|
|
|
|
ifdef CONFIG_CC_IS_GCC
|
|
# The allocators already balk at large sizes, so silence the compiler
|
|
# warnings for bounds checks involving those possible values. While
|
|
# -Wno-alloc-size-larger-than would normally be used here, earlier versions
|
|
# of gcc (<9.1) weirdly don't handle the option correctly when _other_
|
|
# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX
|
|
# doesn't work (as it is documented to), silently resolving to "0" prior to
|
|
# version 9.1 (and producing an error more recently). Numeric values larger
|
|
# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently
|
|
# ignored, continuing to default to PTRDIFF_MAX. So, left with no other
|
|
# choice, we must perform a versioned check to disable this warning.
|
|
# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
|
|
KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than)
|
|
endif
|
|
|
|
# disable invalid "can't wrap" optimizations for signed / pointers
|
|
KBUILD_CFLAGS += -fno-strict-overflow
|
|
|
|
# Make sure -fstack-check isn't enabled (like gentoo apparently did)
|
|
KBUILD_CFLAGS += -fno-stack-check
|
|
|
|
# conserve stack if available
|
|
ifdef CONFIG_CC_IS_GCC
|
|
KBUILD_CFLAGS += -fconserve-stack
|
|
endif
|
|
|
|
# Prohibit date/time macros, which would make the build non-deterministic
|
|
KBUILD_CFLAGS += -Werror=date-time
|
|
|
|
# enforce correct pointer usage
|
|
KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
|
|
|
|
# Require designated initializers for all marked structures
|
|
KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
|
|
|
|
# change __FILE__ to the relative path from the srctree
|
|
KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
|
|
|
|
# include additional Makefiles when needed
|
|
include-y := scripts/Makefile.extrawarn
|
|
include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug
|
|
include-$(CONFIG_KASAN) += scripts/Makefile.kasan
|
|
include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
|
|
include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
|
|
include-$(CONFIG_KCOV) += scripts/Makefile.kcov
|
|
include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct
|
|
include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
|
|
|
|
include $(addprefix $(srctree)/, $(include-y))
|
|
|
|
# scripts/Makefile.gcc-plugins is intentionally included last.
|
|
# Do not add $(call cc-option,...) below this line. When you build the kernel
|
|
# from the clean source tree, the GCC plugins do not exist at this point.
|
|
|
|
# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments
|
|
KBUILD_CPPFLAGS += $(KCPPFLAGS)
|
|
KBUILD_AFLAGS += $(KAFLAGS)
|
|
KBUILD_CFLAGS += $(KCFLAGS)
|
|
KBUILD_RUSTFLAGS += $(KRUSTFLAGS)
|
|
|
|
KBUILD_LDFLAGS_MODULE += --build-id=sha1
|
|
LDFLAGS_vmlinux += --build-id=sha1
|
|
|
|
KBUILD_LDFLAGS += -z noexecstack
|
|
ifeq ($(CONFIG_LD_IS_BFD),y)
|
|
KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
|
|
endif
|
|
|
|
ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
|
|
LDFLAGS_vmlinux += $(call ld-option, -X,)
|
|
endif
|
|
|
|
ifeq ($(CONFIG_RELR),y)
|
|
LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags
|
|
endif
|
|
|
|
# We never want expected sections to be placed heuristically by the
|
|
# linker. All sections should be explicitly named in the linker script.
|
|
ifdef CONFIG_LD_ORPHAN_WARN
|
|
LDFLAGS_vmlinux += --orphan-handling=warn
|
|
endif
|
|
|
|
# Align the bit size of userspace programs with the kernel
|
|
KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
|
|
KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
|
|
|
|
# make the checker run with the right architecture
|
|
CHECKFLAGS += --arch=$(ARCH)
|
|
|
|
# insure the checker run with the right endianness
|
|
CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
|
|
|
|
# the checker needs the correct machine size
|
|
CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
|
|
|
|
# Default kernel image to build when no specific target is given.
|
|
# KBUILD_IMAGE may be overruled on the command line or
|
|
# set in the environment
|
|
# Also any assignments in arch/$(ARCH)/Makefile take precedence over
|
|
# this default value
|
|
export KBUILD_IMAGE ?= vmlinux
|
|
|
|
#
|
|
# INSTALL_PATH specifies where to place the updated kernel and system map
|
|
# images. Default is /boot, but you can set it to other values
|
|
export INSTALL_PATH ?= /boot
|
|
|
|
#
|
|
# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
|
|
# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
|
|
# an argument if needed. Otherwise it defaults to the kernel install path
|
|
#
|
|
export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
|
|
|
|
#
|
|
# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
|
|
# relocations required by build roots. This is not defined in the
|
|
# makefile but the argument can be passed to make if needed.
|
|
#
|
|
|
|
MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
|
|
export MODLIB
|
|
|
|
PHONY += prepare0
|
|
|
|
export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
|
|
export MODORDER := $(extmod_prefix)modules.order
|
|
export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/
|
|
core-$(CONFIG_BLOCK) += block/
|
|
core-$(CONFIG_IO_URING) += io_uring/
|
|
core-$(CONFIG_RUST) += rust/
|
|
|
|
vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
|
|
$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
|
|
$(libs-y) $(libs-m)))
|
|
|
|
vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
|
|
$(patsubst %/,%,$(filter %/, $(core-) \
|
|
$(drivers-) $(libs-))))
|
|
|
|
build-dirs := $(vmlinux-dirs)
|
|
clean-dirs := $(vmlinux-alldirs)
|
|
|
|
subdir-modorder := $(addsuffix /modules.order, $(build-dirs))
|
|
|
|
# Externally visible symbols (used by link-vmlinux.sh)
|
|
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
|
|
# used by scripts/Makefile.package
|
|
export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
|
|
|
|
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
|
|
# 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)
|
|
KBUILD_MODULES := 1
|
|
|
|
autoksyms_recursive: descend modules.order
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
|
|
"$(MAKE) -f $(srctree)/Makefile autoksyms_recursive"
|
|
endif
|
|
|
|
autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
|
|
|
|
quiet_cmd_autoksyms_h = GEN $@
|
|
cmd_autoksyms_h = mkdir -p $(dir $@); \
|
|
$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
|
|
|
|
$(autoksyms_h):
|
|
$(call cmd,autoksyms_h)
|
|
|
|
ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
|
|
|
|
# Final link of vmlinux with optional arch pass after final link
|
|
cmd_link-vmlinux = \
|
|
$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
|
|
$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
|
|
|
|
vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
|
|
+$(call if_changed_dep,link-vmlinux)
|
|
|
|
targets := vmlinux
|
|
|
|
# The actual objects are generated when descending,
|
|
# make sure no implicit rule kicks in
|
|
$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
|
|
|
|
filechk_kernel.release = \
|
|
echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
|
|
|
|
# Store (new) KERNELRELEASE string in include/config/kernel.release
|
|
include/config/kernel.release: FORCE
|
|
$(call filechk,kernel.release)
|
|
|
|
# Additional helpers built in scripts/
|
|
# Carefully list dependencies so we do not try to build scripts twice
|
|
# in parallel
|
|
PHONY += scripts
|
|
scripts: scripts_basic scripts_dtc
|
|
$(Q)$(MAKE) $(build)=$(@)
|
|
|
|
# Things we need to do before we recursively start building the kernel
|
|
# or the modules are listed in "prepare".
|
|
# A multi level approach is used. prepareN is processed before prepareN-1.
|
|
# archprepare is used in arch Makefiles and when processed asm symlink,
|
|
# version.h and scripts_basic is processed / created.
|
|
|
|
PHONY += prepare archprepare
|
|
|
|
archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
|
|
asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
|
|
include/generated/autoconf.h remove-stale-files
|
|
|
|
prepare0: archprepare
|
|
$(Q)$(MAKE) $(build)=scripts/mod
|
|
$(Q)$(MAKE) $(build)=.
|
|
|
|
# All the preparing..
|
|
prepare: prepare0
|
|
ifdef CONFIG_RUST
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v
|
|
$(Q)$(MAKE) $(build)=rust
|
|
endif
|
|
|
|
PHONY += remove-stale-files
|
|
remove-stale-files:
|
|
$(Q)$(srctree)/scripts/remove-stale-files
|
|
|
|
# Support for using generic headers in asm-generic
|
|
asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
|
|
|
|
PHONY += asm-generic uapi-asm-generic
|
|
asm-generic: uapi-asm-generic
|
|
$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
|
|
generic=include/asm-generic
|
|
uapi-asm-generic:
|
|
$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
|
|
generic=include/uapi/asm-generic
|
|
|
|
# Generate some files
|
|
# ---------------------------------------------------------------------------
|
|
|
|
# KERNELRELEASE can change from a few different places, meaning version.h
|
|
# needs to be updated, so this check is forced on all builds
|
|
|
|
uts_len := 64
|
|
define filechk_utsrelease.h
|
|
if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
|
|
echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
|
|
exit 1; \
|
|
fi; \
|
|
echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
|
|
endef
|
|
|
|
define filechk_version.h
|
|
if [ $(SUBLEVEL) -gt 255 ]; then \
|
|
echo \#define LINUX_VERSION_CODE $(shell \
|
|
expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
|
|
else \
|
|
echo \#define LINUX_VERSION_CODE $(shell \
|
|
expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
|
|
fi; \
|
|
echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
|
|
((c) > 255 ? 255 : (c)))'; \
|
|
echo \#define LINUX_VERSION_MAJOR $(VERSION); \
|
|
echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
|
|
echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
|
|
endef
|
|
|
|
$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0)
|
|
$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0)
|
|
$(version_h): FORCE
|
|
$(call filechk,version.h)
|
|
|
|
include/generated/utsrelease.h: include/config/kernel.release FORCE
|
|
$(call filechk,utsrelease.h)
|
|
|
|
PHONY += headerdep
|
|
headerdep:
|
|
$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
|
|
$(srctree)/scripts/headerdep.pl -I$(srctree)/include
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Kernel headers
|
|
|
|
#Default location for installed headers
|
|
export INSTALL_HDR_PATH = $(objtree)/usr
|
|
|
|
quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
|
|
cmd_headers_install = \
|
|
mkdir -p $(INSTALL_HDR_PATH); \
|
|
rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
|
|
usr/include $(INSTALL_HDR_PATH)
|
|
|
|
PHONY += headers_install
|
|
headers_install: headers
|
|
$(call cmd,headers_install)
|
|
|
|
PHONY += archheaders archscripts
|
|
|
|
hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
|
|
|
|
PHONY += headers
|
|
headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
|
|
$(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
|
|
$(Q)$(MAKE) $(hdr-inst)=include/uapi
|
|
$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
|
|
|
|
ifdef CONFIG_HEADERS_INSTALL
|
|
prepare: headers
|
|
endif
|
|
|
|
PHONY += scripts_unifdef
|
|
scripts_unifdef: scripts_basic
|
|
$(Q)$(MAKE) $(build)=scripts scripts/unifdef
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Install
|
|
|
|
# Many distributions have the custom install script, /sbin/installkernel.
|
|
# If DKMS is installed, 'make install' will eventually recurse back
|
|
# to this Makefile to build and install external modules.
|
|
# Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
|
|
|
|
quiet_cmd_install = INSTALL $(INSTALL_PATH)
|
|
cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Tools
|
|
|
|
ifdef CONFIG_OBJTOOL
|
|
prepare: tools/objtool
|
|
endif
|
|
|
|
ifdef CONFIG_BPF
|
|
ifdef CONFIG_DEBUG_INFO_BTF
|
|
prepare: tools/bpf/resolve_btfids
|
|
endif
|
|
endif
|
|
|
|
PHONY += resolve_btfids_clean
|
|
|
|
resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
|
|
|
|
# tools/bpf/resolve_btfids directory might not exist
|
|
# in output directory, skip its clean in that case
|
|
resolve_btfids_clean:
|
|
ifneq ($(wildcard $(resolve_btfids_O)),)
|
|
$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
|
|
endif
|
|
|
|
# Clear a bunch of variables before executing the submake
|
|
ifeq ($(quiet),silent_)
|
|
tools_silent=s
|
|
endif
|
|
|
|
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/
|
|
|
|
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/ $*
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Kernel selftest
|
|
|
|
PHONY += kselftest
|
|
kselftest: headers
|
|
$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
|
|
|
|
kselftest-%: headers FORCE
|
|
$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
|
|
|
|
PHONY += kselftest-merge
|
|
kselftest-merge:
|
|
$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
|
|
$(Q)find $(srctree)/tools/testing/selftests -name config | \
|
|
xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Devicetree files
|
|
|
|
ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
|
|
dtstree := arch/$(SRCARCH)/boot/dts
|
|
endif
|
|
|
|
ifneq ($(dtstree),)
|
|
|
|
%.dtb: dtbs_prepare
|
|
$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
|
|
|
|
%.dtbo: dtbs_prepare
|
|
$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
|
|
|
|
PHONY += dtbs dtbs_prepare dtbs_install dtbs_check
|
|
dtbs: dtbs_prepare
|
|
$(Q)$(MAKE) $(build)=$(dtstree)
|
|
|
|
# include/config/kernel.release is actually needed when installing DTBs because
|
|
# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
|
|
# dtbs_install depend on it as dtbs_install may run as root.
|
|
dtbs_prepare: include/config/kernel.release scripts_dtc
|
|
|
|
ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
|
|
export CHECK_DTBS=y
|
|
dtbs: dt_binding_check
|
|
endif
|
|
|
|
dtbs_check: dtbs
|
|
|
|
dtbs_install:
|
|
$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
|
|
|
|
ifdef CONFIG_OF_EARLY_FLATTREE
|
|
all: dtbs
|
|
endif
|
|
|
|
endif
|
|
|
|
PHONY += scripts_dtc
|
|
scripts_dtc: scripts_basic
|
|
$(Q)$(MAKE) $(build)=scripts/dtc
|
|
|
|
ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
|
|
export CHECK_DT_BINDING=y
|
|
endif
|
|
|
|
PHONY += dt_binding_check
|
|
dt_binding_check: scripts_dtc
|
|
$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Modules
|
|
|
|
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
|
|
# duplicate lines in modules.order files. Those are removed
|
|
# using awk while concatenating to the final file.
|
|
|
|
PHONY += modules
|
|
modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
|
|
|
|
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
|
|
modules_prepare: prepare
|
|
$(Q)$(MAKE) $(build)=scripts scripts/module.lds
|
|
|
|
export modules_sign_only :=
|
|
|
|
ifeq ($(CONFIG_MODULE_SIG),y)
|
|
PHONY += modules_sign
|
|
modules_sign: modules_install
|
|
@:
|
|
|
|
# modules_sign is a subset of modules_install.
|
|
# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
|
|
ifeq ($(filter modules_install,$(MAKECMDGOALS)),)
|
|
modules_sign_only := y
|
|
endif
|
|
endif
|
|
|
|
modinst_pre :=
|
|
ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
|
|
modinst_pre := __modinst_pre
|
|
endif
|
|
|
|
modules_install: $(modinst_pre)
|
|
PHONY += __modinst_pre
|
|
__modinst_pre:
|
|
@rm -rf $(MODLIB)/kernel
|
|
@rm -f $(MODLIB)/source
|
|
@mkdir -p $(MODLIB)/kernel
|
|
@ln -s $(abspath $(srctree)) $(MODLIB)/source
|
|
@if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
|
|
rm -f $(MODLIB)/build ; \
|
|
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 $(MODLIB)/
|
|
|
|
endif # CONFIG_MODULES
|
|
|
|
###
|
|
# Cleaning is done on three levels.
|
|
# make clean Delete most generated files
|
|
# Leave enough to build external modules
|
|
# make mrproper Delete the current configuration, and all generated files
|
|
# make distclean Remove editor backup files, patch leftover files and the like
|
|
|
|
# Directories & files removed with 'make clean'
|
|
CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
|
|
modules.builtin modules.builtin.modinfo modules.nsdeps \
|
|
compile_commands.json .thinlto-cache rust/test rust/doc
|
|
|
|
# Directories & files removed with 'make mrproper'
|
|
MRPROPER_FILES += include/config include/generated \
|
|
arch/$(SRCARCH)/include/generated .objdiff \
|
|
debian snap tar-install \
|
|
.config .config.old .version \
|
|
Module.symvers \
|
|
certs/signing_key.pem \
|
|
certs/x509.genkey \
|
|
vmlinux-gdb.py \
|
|
*.spec \
|
|
rust/target.json rust/libmacros.so
|
|
|
|
# clean - Delete most, but leave enough to build external modules
|
|
#
|
|
clean: rm-files := $(CLEAN_FILES)
|
|
|
|
PHONY += archclean vmlinuxclean
|
|
|
|
vmlinuxclean:
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
|
|
$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
|
|
|
|
clean: archclean vmlinuxclean resolve_btfids_clean
|
|
|
|
# mrproper - Delete all generated files, including .config
|
|
#
|
|
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
|
|
mrproper-dirs := $(addprefix _mrproper_,scripts)
|
|
|
|
PHONY += $(mrproper-dirs) mrproper
|
|
$(mrproper-dirs):
|
|
$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
|
|
|
|
mrproper: clean $(mrproper-dirs)
|
|
$(call cmd,rmfiles)
|
|
@find . $(RCS_FIND_IGNORE) \
|
|
\( -name '*.rmeta' \) \
|
|
-type f -print | xargs rm -f
|
|
|
|
# distclean
|
|
#
|
|
PHONY += distclean
|
|
|
|
distclean: mrproper
|
|
@find . $(RCS_FIND_IGNORE) \
|
|
\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
|
|
-o -name '*.bak' -o -name '#*#' -o -name '*%' \
|
|
-o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
|
|
-o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
|
|
-type f -print | xargs rm -f
|
|
|
|
|
|
# Packaging of the kernel to various formats
|
|
# ---------------------------------------------------------------------------
|
|
|
|
%src-pkg: FORCE
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
|
|
%pkg: include/config/kernel.release FORCE
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
|
|
|
|
# Brief documentation of the typical targets used
|
|
# ---------------------------------------------------------------------------
|
|
|
|
boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
|
|
boards := $(sort $(notdir $(boards)))
|
|
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
|
|
board-dirs := $(sort $(notdir $(board-dirs:/=)))
|
|
|
|
PHONY += help
|
|
help:
|
|
@echo 'Cleaning targets:'
|
|
@echo ' clean - Remove most generated files but keep the config and'
|
|
@echo ' enough build support to build external modules'
|
|
@echo ' mrproper - Remove all generated files + config + various backup files'
|
|
@echo ' distclean - mrproper + remove editor backup and patch files'
|
|
@echo ''
|
|
@echo 'Configuration targets:'
|
|
@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
|
|
@echo ''
|
|
@echo 'Other generic targets:'
|
|
@echo ' all - Build all targets marked with [*]'
|
|
@echo '* vmlinux - Build the bare kernel'
|
|
@echo '* modules - Build all modules'
|
|
@echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
|
|
@echo ' dir/ - Build all files in dir and below'
|
|
@echo ' dir/file.[ois] - Build specified target only'
|
|
@echo ' dir/file.ll - Build the LLVM assembly file'
|
|
@echo ' (requires compiler support for LLVM assembly generation)'
|
|
@echo ' dir/file.lst - Build specified mixed source/assembly target only'
|
|
@echo ' (requires a recent binutils and recent build (System.map))'
|
|
@echo ' dir/file.ko - Build module including final link'
|
|
@echo ' modules_prepare - Set up for building external modules'
|
|
@echo ' tags/TAGS - Generate tags file for editors'
|
|
@echo ' cscope - Generate cscope index'
|
|
@echo ' gtags - Generate GNU GLOBAL index'
|
|
@echo ' kernelrelease - Output the release version string (use with make -s)'
|
|
@echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
|
|
@echo ' image_name - Output the image name (use with make -s)'
|
|
@echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
|
|
echo ' (default: $(INSTALL_HDR_PATH))'; \
|
|
echo ''
|
|
@echo 'Static analysers:'
|
|
@echo ' checkstack - Generate a list of stack hogs'
|
|
@echo ' versioncheck - Sanity check on version.h usage'
|
|
@echo ' includecheck - Check for duplicate included header files'
|
|
@echo ' export_report - List the usages of all exported symbols'
|
|
@echo ' headerdep - Detect inclusion cycles in headers'
|
|
@echo ' coccicheck - Check with Coccinelle'
|
|
@echo ' clang-analyzer - Check with clang static analyzer'
|
|
@echo ' clang-tidy - Check with clang-tidy'
|
|
@echo ''
|
|
@echo 'Tools:'
|
|
@echo ' nsdeps - Generate missing symbol namespace dependencies'
|
|
@echo ''
|
|
@echo 'Kernel selftest:'
|
|
@echo ' kselftest - Build and run kernel selftest'
|
|
@echo ' Build, install, and boot kernel before'
|
|
@echo ' running kselftest on it'
|
|
@echo ' Run as root for full coverage'
|
|
@echo ' kselftest-all - Build kernel selftest'
|
|
@echo ' kselftest-install - Build and install kernel selftest'
|
|
@echo ' kselftest-clean - Remove all generated kselftest files'
|
|
@echo ' kselftest-merge - Merge all the config dependencies of'
|
|
@echo ' kselftest to existing .config.'
|
|
@echo ''
|
|
@echo 'Rust targets:'
|
|
@echo ' rustavailable - Checks whether the Rust toolchain is'
|
|
@echo ' available and, if not, explains why.'
|
|
@echo ' rustfmt - Reformat all the Rust code in the kernel'
|
|
@echo ' rustfmtcheck - Checks if all the Rust code in the kernel'
|
|
@echo ' is formatted, printing a diff otherwise.'
|
|
@echo ' rustdoc - Generate Rust documentation'
|
|
@echo ' (requires kernel .config)'
|
|
@echo ' rusttest - Runs the Rust tests'
|
|
@echo ' (requires kernel .config; downloads external repos)'
|
|
@echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file'
|
|
@echo ' (requires kernel .config)'
|
|
@echo ' dir/file.[os] - Build specified target only'
|
|
@echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.'
|
|
@echo ' Run with RUSTFMT=n to skip reformatting if needed.'
|
|
@echo ' The output is not intended to be compilable.'
|
|
@echo ' dir/file.ll - Build the LLVM assembly file'
|
|
@echo ''
|
|
@$(if $(dtstree), \
|
|
echo 'Devicetree:'; \
|
|
echo '* dtbs - Build device tree blobs for enabled boards'; \
|
|
echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
|
|
echo ' dt_binding_check - Validate device tree binding documents'; \
|
|
echo ' dtbs_check - Validate device tree source files';\
|
|
echo '')
|
|
|
|
@echo 'Userspace tools targets:'
|
|
@echo ' use "make tools/help"'
|
|
@echo ' or "cd tools; make help"'
|
|
@echo ''
|
|
@echo 'Kernel packaging:'
|
|
@$(MAKE) -f $(srctree)/scripts/Makefile.package help
|
|
@echo ''
|
|
@echo 'Documentation targets:'
|
|
@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
|
|
@echo ''
|
|
@echo 'Architecture specific targets ($(SRCARCH)):'
|
|
@$(or $(archhelp),\
|
|
echo ' No architecture specific help defined for $(SRCARCH)')
|
|
@echo ''
|
|
@$(if $(boards), \
|
|
$(foreach b, $(boards), \
|
|
printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
|
|
echo '')
|
|
@$(if $(board-dirs), \
|
|
$(foreach b, $(board-dirs), \
|
|
printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
|
|
printf " %-16s - Show all of the above\\n" help-boards; \
|
|
echo '')
|
|
|
|
@echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
|
|
@echo ' make V=2 [targets] 2 => give reason for rebuild of target'
|
|
@echo ' make O=dir [targets] Locate all output files in "dir", including .config'
|
|
@echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
|
|
@echo ' (sparse by default)'
|
|
@echo ' make C=2 [targets] Force check of all c source with $$CHECK'
|
|
@echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
|
|
@echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
|
|
@echo ' 1: warnings which may be relevant and do not occur too often'
|
|
@echo ' 2: warnings which occur quite often but may still be relevant'
|
|
@echo ' 3: more obscure warnings, can most likely be ignored'
|
|
@echo ' e: warnings are being treated as errors'
|
|
@echo ' Multiple levels can be combined with W=12 or W=123'
|
|
@echo ''
|
|
@echo 'Execute "make" or "make all" to build all targets marked with [*] '
|
|
@echo 'For further info see the ./README file'
|
|
|
|
|
|
help-board-dirs := $(addprefix help-,$(board-dirs))
|
|
|
|
help-boards: $(help-board-dirs)
|
|
|
|
boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
|
|
|
|
$(help-board-dirs): help-%:
|
|
@echo 'Architecture specific targets ($(SRCARCH) $*):'
|
|
@$(if $(boards-per-dir), \
|
|
$(foreach b, $(boards-per-dir), \
|
|
printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
|
|
echo '')
|
|
|
|
|
|
# Documentation targets
|
|
# ---------------------------------------------------------------------------
|
|
DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
|
|
linkcheckdocs dochelp refcheckdocs
|
|
PHONY += $(DOC_TARGETS)
|
|
$(DOC_TARGETS):
|
|
$(Q)$(MAKE) $(build)=Documentation $@
|
|
|
|
|
|
# Rust targets
|
|
# ---------------------------------------------------------------------------
|
|
|
|
# "Is Rust available?" target
|
|
PHONY += rustavailable
|
|
rustavailable:
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!"
|
|
|
|
# Documentation target
|
|
#
|
|
# Using the singular to avoid running afoul of `no-dot-config-targets`.
|
|
PHONY += rustdoc
|
|
rustdoc: prepare
|
|
$(Q)$(MAKE) $(build)=rust $@
|
|
|
|
# Testing target
|
|
PHONY += rusttest
|
|
rusttest: prepare
|
|
$(Q)$(MAKE) $(build)=rust $@
|
|
|
|
# Formatting targets
|
|
PHONY += rustfmt rustfmtcheck
|
|
|
|
# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream.
|
|
#
|
|
# We match using absolute paths since `find` does not resolve them
|
|
# when matching, which is a problem when e.g. `srctree` is `..`.
|
|
# We `grep` afterwards in order to remove the directory entry itself.
|
|
rustfmt:
|
|
$(Q)find $(abs_srctree) -type f -name '*.rs' \
|
|
-o -path $(abs_srctree)/rust/alloc -prune \
|
|
-o -path $(abs_objtree)/rust/test -prune \
|
|
| grep -Fv $(abs_srctree)/rust/alloc \
|
|
| grep -Fv $(abs_objtree)/rust/test \
|
|
| grep -Fv generated \
|
|
| xargs $(RUSTFMT) $(rustfmt_flags)
|
|
|
|
rustfmtcheck: rustfmt_flags = --check
|
|
rustfmtcheck: rustfmt
|
|
|
|
# IDE support targets
|
|
PHONY += rust-analyzer
|
|
rust-analyzer:
|
|
$(Q)$(MAKE) $(build)=rust $@
|
|
|
|
# Misc
|
|
# ---------------------------------------------------------------------------
|
|
|
|
PHONY += scripts_gdb
|
|
scripts_gdb: prepare0
|
|
$(Q)$(MAKE) $(build)=scripts/gdb
|
|
$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
|
|
|
|
ifdef CONFIG_GDB_SCRIPTS
|
|
all: scripts_gdb
|
|
endif
|
|
|
|
else # KBUILD_EXTMOD
|
|
|
|
###
|
|
# External module support.
|
|
# When building external modules the kernel used as basis is considered
|
|
# read-only, and no consistency checks are made and the make
|
|
# system is not used on the basis kernel. If updates are required
|
|
# in the basis kernel ordinary make commands (without M=...) must be used.
|
|
|
|
# We are always building only modules.
|
|
KBUILD_BUILTIN :=
|
|
KBUILD_MODULES := 1
|
|
|
|
build-dirs := $(KBUILD_EXTMOD)
|
|
$(MODORDER): descend
|
|
@:
|
|
|
|
compile_commands.json: $(extmod_prefix)compile_commands.json
|
|
PHONY += compile_commands.json
|
|
|
|
clean-dirs := $(KBUILD_EXTMOD)
|
|
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
|
|
$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
|
|
|
|
PHONY += prepare
|
|
# now expand this into a simple variable to reduce the cost of shell evaluations
|
|
prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
|
|
prepare:
|
|
@if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \
|
|
echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
|
|
echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \
|
|
echo >&2 " You are using: $(CC_VERSION_TEXT)"; \
|
|
fi
|
|
|
|
PHONY += help
|
|
help:
|
|
@echo ' Building external modules.'
|
|
@echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
|
|
@echo ''
|
|
@echo ' modules - default target, build the module(s)'
|
|
@echo ' modules_install - install the module'
|
|
@echo ' clean - remove generated files in module directory only'
|
|
@echo ''
|
|
|
|
# no-op for external module builds
|
|
PHONY += modules_prepare
|
|
|
|
endif # KBUILD_EXTMOD
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Modules
|
|
|
|
PHONY += modules modules_install
|
|
|
|
ifdef CONFIG_MODULES
|
|
|
|
modules: modules_check
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
|
|
|
|
PHONY += modules_check
|
|
modules_check: $(MODORDER)
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
|
|
|
|
quiet_cmd_depmod = DEPMOD $(MODLIB)
|
|
cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
|
|
$(KERNELRELEASE)
|
|
|
|
modules_install:
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
|
|
$(call cmd,depmod)
|
|
|
|
else # CONFIG_MODULES
|
|
|
|
# Modules not configured
|
|
# ---------------------------------------------------------------------------
|
|
|
|
modules modules_install:
|
|
@echo >&2 '***'
|
|
@echo >&2 '*** The present kernel configuration has modules disabled.'
|
|
@echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
|
|
@echo >&2 '*** to enable CONFIG_MODULES.'
|
|
@echo >&2 '***'
|
|
@exit 1
|
|
|
|
endif # CONFIG_MODULES
|
|
|
|
# Single targets
|
|
# ---------------------------------------------------------------------------
|
|
# To build individual files in subdirectories, you can do like this:
|
|
#
|
|
# make foo/bar/baz.s
|
|
#
|
|
# The supported suffixes for single-target are listed in 'single-targets'
|
|
#
|
|
# To build only under specific subdirectories, you can do like this:
|
|
#
|
|
# make foo/bar/baz/
|
|
|
|
ifdef single-build
|
|
|
|
# .ko is special because modpost is needed
|
|
single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
|
|
single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
|
|
$(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
|
|
|
|
$(single-ko): single_modpost
|
|
@:
|
|
$(single-no-ko): descend
|
|
@:
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
# For the single build of in-tree modules, use a temporary file to avoid
|
|
# the situation of modules_install installing an invalid modules.order.
|
|
MODORDER := .modules.tmp
|
|
endif
|
|
|
|
PHONY += single_modpost
|
|
single_modpost: $(single-no-ko) modules_prepare
|
|
$(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
|
|
|
|
KBUILD_MODULES := 1
|
|
|
|
export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
|
|
|
|
# trim unrelated directories
|
|
build-dirs := $(foreach d, $(build-dirs), \
|
|
$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
|
|
|
|
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
|
|
# make menuconfig etc.
|
|
# Error messages still appears in the original language
|
|
PHONY += descend $(build-dirs)
|
|
descend: $(build-dirs)
|
|
$(build-dirs): prepare
|
|
$(Q)$(MAKE) $(build)=$@ \
|
|
single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
|
|
need-builtin=1 need-modorder=1
|
|
|
|
clean-dirs := $(addprefix _clean_, $(clean-dirs))
|
|
PHONY += $(clean-dirs) clean
|
|
$(clean-dirs):
|
|
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
|
|
|
clean: $(clean-dirs)
|
|
$(call cmd,rmfiles)
|
|
@find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
|
|
\( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
|
|
-o -name '*.ko.*' \
|
|
-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
|
|
-o -name '*.dwo' -o -name '*.lst' \
|
|
-o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \
|
|
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
|
|
-o -name '*.lex.c' -o -name '*.tab.[ch]' \
|
|
-o -name '*.asn1.[ch]' \
|
|
-o -name '*.symtypes' -o -name 'modules.order' \
|
|
-o -name '.tmp_*' \
|
|
-o -name '*.c.[012]*.*' \
|
|
-o -name '*.ll' \
|
|
-o -name '*.gcno' \
|
|
-o -name '*.*.symversions' \) -type f -print | xargs rm -f
|
|
|
|
# Generate tags for editors
|
|
# ---------------------------------------------------------------------------
|
|
quiet_cmd_tags = GEN $@
|
|
cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
|
|
|
|
tags TAGS cscope gtags: FORCE
|
|
$(call cmd,tags)
|
|
|
|
# Script to generate missing namespace dependencies
|
|
# ---------------------------------------------------------------------------
|
|
|
|
PHONY += nsdeps
|
|
nsdeps: export KBUILD_NSDEPS=1
|
|
nsdeps: modules
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
|
|
|
|
# Clang Tooling
|
|
# ---------------------------------------------------------------------------
|
|
|
|
quiet_cmd_gen_compile_commands = GEN $@
|
|
cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
|
|
|
|
$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
|
|
$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
|
|
$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
|
|
$(call if_changed,gen_compile_commands)
|
|
|
|
targets += $(extmod_prefix)compile_commands.json
|
|
|
|
PHONY += clang-tidy clang-analyzer
|
|
|
|
ifdef CONFIG_CC_IS_CLANG
|
|
quiet_cmd_clang_tools = CHECK $<
|
|
cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
|
|
|
|
clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
|
|
$(call cmd,clang_tools)
|
|
else
|
|
clang-tidy clang-analyzer:
|
|
@echo "$@ requires CC=clang" >&2
|
|
@false
|
|
endif
|
|
|
|
# Scripts to check various things for consistency
|
|
# ---------------------------------------------------------------------------
|
|
|
|
PHONY += includecheck versioncheck coccicheck export_report
|
|
|
|
includecheck:
|
|
find $(srctree)/* $(RCS_FIND_IGNORE) \
|
|
-name '*.[hcS]' -type f -print | sort \
|
|
| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
|
|
|
|
versioncheck:
|
|
find $(srctree)/* $(RCS_FIND_IGNORE) \
|
|
-name '*.[hcS]' -type f -print | sort \
|
|
| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
|
|
|
|
coccicheck:
|
|
$(Q)$(BASH) $(srctree)/scripts/$@
|
|
|
|
export_report:
|
|
$(PERL) $(srctree)/scripts/export_report.pl
|
|
|
|
PHONY += checkstack kernelrelease kernelversion image_name
|
|
|
|
# UML needs a little special treatment here. It wants to use the host
|
|
# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
|
|
# else wants $(ARCH), including people doing cross-builds, which means
|
|
# that $(SUBARCH) doesn't work here.
|
|
ifeq ($(ARCH), um)
|
|
CHECKSTACK_ARCH := $(SUBARCH)
|
|
else
|
|
CHECKSTACK_ARCH := $(ARCH)
|
|
endif
|
|
checkstack:
|
|
$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
|
|
$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
|
|
|
|
kernelrelease:
|
|
@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
|
|
|
|
kernelversion:
|
|
@echo $(KERNELVERSION)
|
|
|
|
image_name:
|
|
@echo $(KBUILD_IMAGE)
|
|
|
|
quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
|
|
cmd_rmfiles = rm -rf $(rm-files)
|
|
|
|
# read saved command lines for existing targets
|
|
existing-targets := $(wildcard $(sort $(targets)))
|
|
|
|
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
|
|
|
|
endif # config-build
|
|
endif # mixed-build
|
|
endif # need-sub-make
|
|
|
|
PHONY += FORCE
|
|
FORCE:
|
|
|
|
# Declare the contents of the PHONY variable as phony. We keep that
|
|
# information in a variable so we can use it in if_changed and friends.
|
|
.PHONY: $(PHONY)
|