1 # Makefile.arm -- with config changes.
2 # Copyright 1990 W. Jolitz
3 # from: @(#)Makefile.i386 7.1 5/10/91
8 # This makefile is constructed from a machine description:
10 # Most changes should be made in the machine description
11 # /sys/arm/conf/``machineid''
12 # after which you should do
14 # Generic makefile changes should be made in
15 # /sys/conf/Makefile.arm
16 # after which config should be rerun for all machines.
19 # Which version of config(8) is required.
31 .include "$S/conf/kern.pre.mk"
33 INCLUDES+= -I$S/contrib/libfdt -I$S/gnu/dts/include
35 .if !defined(DEBUG) && !defined(PROFLEVEL)
39 # We don't support gcc's thump interwork stuff, so disable it
40 CFLAGS.gcc += -mno-thumb-interwork
42 # We generally don't want fpu instructions in the kernel.
43 CFLAGS.clang += -mfpu=none
45 .if !empty(DDB_ENABLED)
46 CFLAGS += -funwind-tables
47 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} < 30500
48 # clang < 3.5.0 requires us to tell it to emit assembly with unwind information
49 CFLAGS += -mllvm -arm-enable-ehabi
53 # "makeoptions KERNVIRTADDR=" is now optional, supply the default value.
54 .if empty(KERNVIRTADDR)
55 KERNVIRTADDR= 0xc0000000
58 # Use a custom SYSTEM_LD command to generate the elf kernel, so we can
59 # set the text segment start address, and also strip the "arm mapping
60 # symbols" which have names like $a.0 and $d.2; see the document
61 # "ELF for the ARM architecture" for more info on the mapping symbols.
63 ${SYSTEM_LD_BASECMD} \
64 --defsym='text_start=kernbase + SIZEOF_HEADERS' \
65 -o ${.TARGET} ${SYSTEM_OBJS} vers.o; \
68 --strip-symbol='$$[adt]*' \
71 # Generate the .bin (no elf headers) kernel as an extra build output.
72 # We must relink to generate the .bin kernel, because without headers the
73 # location of everything changes. We also strip the ARM marker symbols.
74 KERNEL_EXTRA+= ${KERNEL_KO}.bin
75 KERNEL_EXTRA_INSTALL+= ${KERNEL_KO}.bin
77 ${KERNEL_KO}.bin: ${SYSTEM_DEP} vers.o
78 @echo "linking ${.TARGET}"
79 @${SYSTEM_LD_BASECMD} \
80 --defsym='text_start=kernbase' \
81 -o ${.TARGET} ${SYSTEM_OBJS} vers.o
85 --strip-symbol='$$[adt]*' \
86 --output-target=binary \
90 # hack because genassym.c includes sys/bus.h which includes these.
91 genassym.o: bus_if.h device_if.h
105 CLEAN+= ${KERNEL_KO}.bin
109 .include "$S/conf/kern.post.mk"