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c2628accc0
It has been supported since GCC 9. It is unlikely anything older than that will build the kernel so mark it as supported by GCC. Reviewed by: brooks, jhb Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D45267
96 lines
3 KiB
Makefile
96 lines
3 KiB
Makefile
# Makefile.arm64 -- with config changes.
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# Copyright 1990 W. Jolitz
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# from FreeBSD: src/sys/conf/Makefile.i386,v 1.255 2002/02/20 23:35:49
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#
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# Makefile for FreeBSD
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#
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# This makefile is constructed from a machine description:
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# config machineid
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# Most changes should be made in the machine description
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# /sys/arm64/conf/``machineid''
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# after which you should do
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# config machineid
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# Generic makefile changes should be made in
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# /sys/conf/Makefile.arm64
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# after which config should be rerun for all machines.
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#
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# Which version of config(8) is required.
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%VERSREQ= 600012
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.if !defined(S)
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S= ../../..
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.endif
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.include "$S/conf/kern.pre.mk"
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INCLUDES+= -I$S/contrib/libfdt -I$S/contrib/device-tree/include
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LINUX_DTS_VERSION!= awk '/freebsd,dts-version/ { sub(/;$$/,"", $$NF); print $$NF }' $S/dts/freebsd-compatible.dts
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CFLAGS += -DLINUX_DTS_VERSION=\"${LINUX_DTS_VERSION}\"
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PERTHREAD_SSP_ENABLED!= grep PERTHREAD_SSP opt_global.h || true ; echo
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.if !empty(PERTHREAD_SSP_ENABLED)
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. if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 130000) || \
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${COMPILER_TYPE} == "gcc"
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ARM64_SSP_CFLAGS = -mstack-protector-guard=sysreg
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ARM64_SSP_CFLAGS += -mstack-protector-guard-reg=sp_el0
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ARM64_SSP_CFLAGS += -mstack-protector-guard-offset=0
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. else
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ARM64_SSP_CFLAGS += -DPERTHREAD_SSP_WARNING
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. warning "Compiler is too old to support PERTHREAD_SSP"
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. endif
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CFLAGS += ${ARM64_SSP_CFLAGS}
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ARCH_FLAGS += ${ARM64_SSP_CFLAGS}
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.endif
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# Use a custom SYSTEM_LD command to generate the elf kernel, so we can
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# set the text segment start address, and also strip the "arm mapping
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# symbols" which have names like $a.0 and $d.2; see the document
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# "ELF for the ARM architecture" for more info on the mapping symbols.
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SYSTEM_LD= \
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${SYSTEM_LD_BASECMD} \
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--defsym='text_start=kernbase + SIZEOF_HEADERS' \
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-o ${.TARGET} ${SYSTEM_OBJS} vers.o; \
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$(OBJCOPY) \
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--wildcard \
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--strip-symbol='$$[adtx]*' \
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${.TARGET}
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.if !empty(DDB_ENABLED) || !empty(DTRACE_ENABLED) || !empty(HWPMC_ENABLED)
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CFLAGS += -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
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.endif
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%BEFORE_DEPEND
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%OBJS
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%FILES.c
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%FILES.s
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%FILES.m
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%CLEAN
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%RULES
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.include "$S/conf/kern.post.mk"
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# Create a kernel.bin file...
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# Copy the kernel to u-boot's booti image format (the elf headers are
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# stripped and a custom binary head blob is prepended), saving the
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# output in a temp file. We also strip arm "marker" symbols which are
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# used only by elf toolchains. Read the symbols from kernel.full and pass
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# them to arm_kernel_boothdr.awk, which generates a binary header blob
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# that goes on the front of the stripped kernel. Cat the header blob
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# and the temp file together to make the kernel.bin file.
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${KERNEL_KO}.bin: ${FULLKERNEL}
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@${OBJCOPY} --wildcard --strip-symbol='$$[adtx]*' \
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--output-target=binary ${FULLKERNEL} ${.TARGET}.temp
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@{ ${NM} ${FULLKERNEL} | \
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${AWK} -f $S/tools/arm_kernel_boothdr.awk -v hdrtype=v8booti && \
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cat ${.TARGET}.temp; \
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} > ${.TARGET}
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@rm ${.TARGET}.temp
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@echo "created ${.TARGET} from ${.ALLSRC}"
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