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freebsd/sys/conf/Makefile.arm64
Andrew Turner c2628accc0 sys: Build arm64 per-thread SSP with GCC
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
2024-05-22 08:20:01 +00:00

96 lines
3.0 KiB
Makefile

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