xref: /netbsd/sys/arch/amd64/conf/Makefile.amd64 (revision c8c6265e)

#	$NetBSD: Makefile.amd64,v 1.78 2019/09/07 18:56:01 maxv Exp $

# Makefile for NetBSD
#
# This makefile is constructed from a machine description:
#	config machineid
# Most changes should be made in the machine description
#	/sys/arch/amd64/conf/``machineid''
# after which you should do
#	config machineid
# Machine generic makefile changes should be made in
#	/sys/arch/amd64/conf/Makefile.amd64
# after which config should be rerun for all machines of that type.
#
# To specify debugging, add the config line: makeoptions DEBUG="-g"
# A better way is to specify -g only for a few files.
#
#	makeoptions DEBUGLIST="uvm* trap if_*"

MACHINE_ARCH=x86_64
USETOOLS?=	no
NEED_OWN_INSTALL_TARGET?=no
NOSANITIZER=
.include <bsd.init.mk>

USE_SSP?=	yes

##
## (1) port identification
##
AMD64=		$S/arch/amd64
GENASSYM_CONF=	${AMD64}/amd64/genassym.cf

##
## (2) compile settings
##
DEFCOPTS=	-O2 -fno-omit-frame-pointer
CPPFLAGS+=	-Damd64 -Dx86_64
CFLAGS+=	-mcmodel=kernel
# -mno-sse implies -mno-sse2 (etc), explicitly disable avx to be extra sure
CFLAGS+=	-mno-red-zone -mno-mmx -mno-sse -mno-avx
# make absolutely sure we don't get x87 registers used as well
CFLAGS+=	-msoft-float
# For gcc we might need this, but other compilers barf
# CFLAGS+=	-mno-fp-ret-in-387

.if ${SPECTRE_V2_GCC_MITIGATION:U0} > 0 && ${HAVE_GCC:U0} > 0
CFLAGS+=      -mindirect-branch=thunk-inline
CFLAGS+=      -mindirect-branch-register
.endif

.if ${KASAN:U0} > 0 && ${HAVE_GCC:U0} > 0
KASANFLAGS=	-fsanitize=kernel-address \
		--param asan-globals=1 --param asan-stack=1 \
		-fsanitize-address-use-after-scope \
		-fasan-shadow-offset=0xDFFF900000000000
.for f in subr_asan.c subr_kcov.c subr_lwp_specificdata.c subr_specificdata.c
KASANFLAGS.${f}=	# empty
.endfor
CFLAGS+=	${KASANFLAGS.${.IMPSRC:T}:U${KASANFLAGS}}
.endif

##
## (3) libkern and compat
##
OPT_MODULAR=	%MODULAR%

##
## (4) local objects, compile rules, and dependencies
##

##
## (5) link settings
##
TEXTADDR?=	0xffffffff80200000
.if defined(KASLR)
EXTRA_LINKFLAGS=	--split-by-file=0x100000 -r -d
KERNLDSCRIPT?= ${AMD64}/conf/kern.ldscript.kaslr
.else
EXTRA_LINKFLAGS=	-z max-page-size=0x200000
KERNLDSCRIPT?= ${AMD64}/conf/kern.ldscript
.endif
LINKFLAGS_NORMAL=	-X

##
## (6) port specific target dependencies
##

# depend on CPU configuration
locore.o machdep.o: Makefile

acpi_wakeup_low.o busfunc.o cpufunc.o cpu_in_cksum.o: assym.h
linux_sigcode.o linux32_sigcode.o lock_stubs.o mptramp.o: assym.h
netbsd32_sigcode.o: assym.h

##
## (7) misc settings
##

##
## (8) config(8) generated machinery
##
%INCLUDES

%OBJS

%CFILES

%SFILES

%LOAD

%RULES

##
## (9) port independent kernel machinery
##
.include "$S/conf/Makefile.kern.inc"

## Include rules for ACPI wakecode
.include "$S/arch/x86/acpi/Makefile.wakecode.inc"

##
## (10) Appending make options.
##
%MAKEOPTIONSAPPEND