The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/conf/Makefile.arm64

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    1 # Makefile.arm64 -- with config changes.
    2 # Copyright 1990 W. Jolitz
    3 #       from: @(#)Makefile.i386 7.1 5/10/91
    4 #       from FreeBSD: src/sys/conf/Makefile.i386,v 1.255 2002/02/20 23:35:49
    5 # $FreeBSD$
    6 #
    7 # Makefile for FreeBSD
    8 #
    9 # This makefile is constructed from a machine description:
   10 #       config machineid
   11 # Most changes should be made in the machine description
   12 #       /sys/arm64/conf/``machineid''
   13 # after which you should do
   14 #        config machineid
   15 # Generic makefile changes should be made in
   16 #       /sys/conf/Makefile.arm64
   17 # after which config should be rerun for all machines.
   18 #
   19 
   20 # Which version of config(8) is required.
   21 %VERSREQ=       600012
   22 
   23 .if !defined(S)
   24 S=      ../../..
   25 .endif
   26 .include "$S/conf/kern.pre.mk"
   27 
   28 INCLUDES+= -I$S/contrib/libfdt -I$S/contrib/device-tree/include
   29 
   30 LINUX_DTS_VERSION!=     awk '/freebsd,dts-version/ { sub(/;$$/,"", $$NF); print $$NF }' $S/dts/freebsd-compatible.dts
   31 CFLAGS += -DLINUX_DTS_VERSION=\"${LINUX_DTS_VERSION}\"
   32 
   33 PERTHREAD_SSP_ENABLED!= grep PERTHREAD_SSP opt_global.h || true ; echo
   34 .if !empty(PERTHREAD_SSP_ENABLED)
   35 . if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 130000
   36 ARM64_SSP_CFLAGS = -mstack-protector-guard=sysreg
   37 ARM64_SSP_CFLAGS += -mstack-protector-guard-reg=sp_el0
   38 ARM64_SSP_CFLAGS += -mstack-protector-guard-offset=0
   39 . else
   40 ARM64_SSP_CFLAGS += -DPERTHREAD_SSP_WARNING
   41 .  warning "Compiler is too old to support PERTHREAD_SSP"
   42 . endif
   43 CFLAGS += ${ARM64_SSP_CFLAGS}
   44 ARCH_FLAGS += ${ARM64_SSP_CFLAGS}
   45 .endif
   46 
   47 # Use a custom SYSTEM_LD command to generate the elf kernel, so we can
   48 # set the text segment start address, and also strip the "arm mapping
   49 # symbols" which have names like $a.0 and $d.2; see the document
   50 # "ELF for the ARM architecture" for more info on the mapping symbols.
   51 SYSTEM_LD= \
   52         ${SYSTEM_LD_BASECMD} \
   53             --defsym='text_start=kernbase + SIZEOF_HEADERS' \
   54             -o ${.TARGET} ${SYSTEM_OBJS} vers.o; \
   55         $(OBJCOPY) \
   56             --wildcard \
   57             --strip-symbol='$$[adtx]*' \
   58             ${.TARGET}
   59 
   60 # Generate the .bin (booti images) kernel as an extra build output.
   61 # The targets and rules to generate these appear near the end of the file.
   62 KERNEL_EXTRA+= ${KERNEL_KO}.bin
   63 KERNEL_EXTRA_INSTALL+= ${KERNEL_KO}.bin
   64 
   65 .if !empty(DDB_ENABLED) || !empty(DTRACE_ENABLED) || !empty(HWPMC_ENABLED)
   66 CFLAGS += -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
   67 .endif
   68 
   69 %BEFORE_DEPEND
   70 
   71 %OBJS
   72 
   73 %FILES.c
   74 
   75 %FILES.s
   76 
   77 %FILES.m
   78 
   79 %CLEAN
   80 CLEAN+= ${KERNEL_KO}.bin
   81 
   82 %RULES
   83 
   84 .include "$S/conf/kern.post.mk"
   85 
   86 # Create a kernel.bin file...
   87 # Copy the kernel to u-boot's booti image format (the elf headers are
   88 # stripped and a custom binary head blob is prepended), saving the
   89 # output in a temp file.  We also strip arm "marker" symbols which are
   90 # used only by elf toolchains.  Read the symbols from kernel.full and pass
   91 # them to arm_kernel_boothdr.awk, which generates a binary header blob
   92 # that goes on the front of the stripped kernel.  Cat the header blob
   93 # and the temp file together to make the kernel.bin file.
   94 ${KERNEL_KO}.bin: ${FULLKERNEL}
   95         @${OBJCOPY} --wildcard --strip-symbol='$$[adtx]*' \
   96             --output-target=binary ${.ALLSRC} ${.TARGET}.temp
   97         @{ ${NM} ${.ALLSRC} | \
   98             ${AWK} -f $S/tools/arm_kernel_boothdr.awk -v hdrtype=v8booti && \
   99             cat ${.TARGET}.temp; \
  100          } > ${.TARGET}
  101         @rm ${.TARGET}.temp
  102         @echo "created ${.TARGET} from ${.ALLSRC}"

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