#       $NetBSD: Makefile.amd64,v 1.86 2023/01/06 15:35:06 christos 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
CFLAGS+=        ${${ACTIVE_CC} == "gcc" :? -mindirect-branch=thunk :}
CFLAGS+=        ${${ACTIVE_CC} == "gcc" :? -mindirect-branch-register :}
endif

if ${KASAN:U0} > 0
if ${HAVE_GCC:U0} > 0
KASANFLAGS=     -fsanitize=kernel-address \
               --param asan-globals=1 --param asan-stack=1 \
               --param asan-instrument-allocas=1 \
               -fsanitize-address-use-after-scope \
               -fasan-shadow-offset=0xDFFF900000000000
elif ${HAVE_LLVM:Uno} == "yes"
KASANFLAGS=     -fsanitize=kernel-address \
               -mllvm -asan-globals=1 -mllvm -asan-stack=1 \
               -mllvm -asan-instrument-dynamic-allocas=1 \
               -mllvm -asan-use-after-scope=1 \
               -mllvm -asan-instrumentation-with-call-threshold=0 \
               -mllvm -asan-mapping-offset=0xDFFF900000000000
endif
for f in subr_asan.c subr_kcov.c
KASANFLAGS.${f}=        # empty
endfor
CFLAGS+=        ${KASANFLAGS.${.IMPSRC:T}:U${KASANFLAGS}}
endif

if ${KCSAN:U0} > 0 && ${HAVE_GCC:U0} > 0
KCSANFLAGS=     -fsanitize=thread
for f in subr_csan.c subr_kcov.c clock.c lapic.c
KCSANFLAGS.${f}=        # empty
endfor
CFLAGS+=        ${KCSANFLAGS.${.IMPSRC:T}:U${KCSANFLAGS}}
endif

if ${KMSAN:U0} > 0 && ${HAVE_LLVM:Uno} == "yes"
KMSANFLAGS=     -fsanitize=kernel-memory
for f in subr_msan.c
KMSANFLAGS.${f}=        # empty
endfor
CFLAGS+=        ${KMSANFLAGS.${.IMPSRC:T}:U${KMSANFLAGS}}
endif

EXTRA_INCLUDES= -I$S/external/mit/xen-include-public/dist/

##
## (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
EXTRA_LINKFLAGS+=       -z noseparate-code

##
## (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