140da6f8fe
This brings arm into line with how every other arch does it. For some reason, only arm lacked a definition of a symbol named kernbase in its locore.S file(s) for use in its ldscript.arm file. Needlessly different means harder to maintain. Using a common symbol name also eases work in progress on a script to help generate arm and arm64 kernels packaged in various ways (like with a header blob needed for a bootloader prepended to the kernel file).
110 lines
2.6 KiB
Makefile
110 lines
2.6 KiB
Makefile
# Makefile.arm -- with config changes.
|
|
# Copyright 1990 W. Jolitz
|
|
# from: @(#)Makefile.i386 7.1 5/10/91
|
|
# $FreeBSD$
|
|
#
|
|
# Makefile for FreeBSD
|
|
#
|
|
# This makefile is constructed from a machine description:
|
|
# config machineid
|
|
# Most changes should be made in the machine description
|
|
# /sys/arm/conf/``machineid''
|
|
# after which you should do
|
|
# config machineid
|
|
# Generic makefile changes should be made in
|
|
# /sys/conf/Makefile.arm
|
|
# after which config should be rerun for all machines.
|
|
#
|
|
|
|
# Which version of config(8) is required.
|
|
%VERSREQ= 600013
|
|
|
|
STD8X16FONT?= iso
|
|
|
|
.if !defined(S)
|
|
.if exists(./@/.)
|
|
S= ./@
|
|
.else
|
|
S= ../../..
|
|
.endif
|
|
.endif
|
|
.include "$S/conf/kern.pre.mk"
|
|
|
|
INCLUDES+= -I$S/contrib/libfdt -I$S/gnu/dts/include
|
|
|
|
.if !defined(DEBUG) && !defined(PROFLEVEL)
|
|
STRIP_FLAGS = -S
|
|
.endif
|
|
|
|
# We don't support gcc's thump interwork stuff, so disable it
|
|
CFLAGS.gcc += -mno-thumb-interwork
|
|
|
|
# We generally don't want fpu instructions in the kernel.
|
|
CFLAGS.clang += -mfpu=none
|
|
|
|
.if !empty(DDB_ENABLED)
|
|
CFLAGS += -funwind-tables
|
|
.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} < 30500
|
|
# clang < 3.5.0 requires us to tell it to emit assembly with unwind information
|
|
CFLAGS += -mllvm -arm-enable-ehabi
|
|
.endif
|
|
.endif
|
|
|
|
# "makeoptions KERNVIRTADDR=" is now optional, supply the default value.
|
|
.if empty(KERNVIRTADDR)
|
|
KERNVIRTADDR= 0xc0000000
|
|
.endif
|
|
|
|
# Use a custom SYSTEM_LD command to generate the elf kernel, so we can
|
|
# set the text segment start address, and also strip the "arm mapping
|
|
# symbols" which have names like $a.0 and $d.2; see the document
|
|
# "ELF for the ARM architecture" for more info on the mapping symbols.
|
|
SYSTEM_LD= \
|
|
${SYSTEM_LD_BASECMD} \
|
|
--defsym='text_start=kernbase + SIZEOF_HEADERS' \
|
|
-o ${.TARGET} ${SYSTEM_OBJS} vers.o; \
|
|
$(OBJCOPY) \
|
|
--wildcard \
|
|
--strip-symbol='$$[adt]*' \
|
|
${.TARGET}
|
|
|
|
# Generate the .bin (no elf headers) kernel as an extra build output.
|
|
# We must relink to generate the .bin kernel, because without headers the
|
|
# location of everything changes. We also strip the ARM marker symbols.
|
|
KERNEL_EXTRA+= ${KERNEL_KO}.bin
|
|
KERNEL_EXTRA_INSTALL+= ${KERNEL_KO}.bin
|
|
|
|
${KERNEL_KO}.bin: ${SYSTEM_DEP} vers.o
|
|
@echo "linking ${.TARGET}"
|
|
@${SYSTEM_LD_BASECMD} \
|
|
--defsym='text_start=kernbase' \
|
|
-o ${.TARGET} ${SYSTEM_OBJS} vers.o
|
|
${SIZE} ${.TARGET}
|
|
@${OBJCOPY} \
|
|
--wildcard \
|
|
--strip-symbol='$$[adt]*' \
|
|
--output-target=binary \
|
|
${.TARGET}
|
|
@chmod 755 ${.TARGET}
|
|
|
|
# hack because genassym.c includes sys/bus.h which includes these.
|
|
genassym.o: bus_if.h device_if.h
|
|
|
|
%BEFORE_DEPEND
|
|
|
|
%OBJS
|
|
|
|
%FILES.c
|
|
|
|
%FILES.s
|
|
|
|
%FILES.m
|
|
|
|
%CLEAN
|
|
|
|
CLEAN+= ${KERNEL_KO}.bin
|
|
|
|
%RULES
|
|
|
|
.include "$S/conf/kern.post.mk"
|