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The objects placed at the head of vmlinux need special treatments: - arch/$(SRCARCH)/Makefile adds them to head-y in order to place them before other archives in the linker command line. - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of obj-y to avoid them going into built-in.a. This commit gets rid of the latter. Create vmlinux.a to collect all the objects that are unconditionally linked to vmlinux. The objects listed in head-y are moved to the head of vmlinux.a by using 'ar m'. With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-y for builtin objects. There is no *.o that is directly linked to vmlinux. Drop unneeded code in scripts/clang-tools/gen_compile_commands.py. $(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggested by Nathan Chancellor [1]. [1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/ Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
705 B
705 B
SPDX-License-Identifier: GPL-2.0
Makefile
ifdef CONFIG_FUNCTION_TRACER
Do not trace early boot code and low level code
CFLAGS_REMOVE_timer.o = -pg CFLAGS_REMOVE_intc.o = -pg CFLAGS_REMOVE_early_printk.o = -pg CFLAGS_REMOVE_ftrace.o = -pg CFLAGS_REMOVE_process.o = -pg endif
extra-y := vmlinux.lds
obj-y += head.o dma.o exceptions.o
hw_exception_handler.o irq.o
process.o prom.o ptrace.o
reset.o setup.o signal.o sys_microblaze.o timer.o traps.o unwind.o
obj-y += cpu/
obj-$(CONFIG_MODULES) += microblaze_ksyms.o module.o obj-y += misc.o obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o mcount.o obj-$(CONFIG_KGDB) += kgdb.o
obj-y += entry.o