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ba045ba49d
Instead of relinking the kernel without elf headers, replace them with a binary blob of the same length starting with a jump to the kernel's start address. This ensures that all symbols stay at the same offsets as in the original kernel, so kernel.debug remains valid also for kernel.bin. Also ensure that the awk script used runs with the neutral locale defined. Awk 'write' is a locale compilant, and script is used to write binary data to a file, so it needs to ensure that bytes > 127 are written unchanged. While I'm on, set the neutral locale also for arm64, where the same script is used to generate the kernel booti image. Reviewed by: emaste, imp Differential Revision: https://reviews.freebsd.org/D47488
97 lines
3.0 KiB
Makefile
97 lines
3.0 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} ${FULLKERNEL} | \
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LC_ALL=C \
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${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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