This is xnu-8019. See this file in:
# -*- mode: makefile;-*-
#
# Copyright (C) 1999-2021 Apple Inc. All rights reserved.
#
# MakeInc.def contains global definitions for building,
# linking, and installing files.
#

#
# Architecture Configuration options
#
SUPPORTED_ARCH_CONFIGS := X86_64 X86_64H ARM ARM64

#
# Kernel Configuration options
#
SUPPORTED_KERNEL_CONFIGS = RELEASE DEVELOPMENT DEBUG PROFILE KASAN


#
# Machine Configuration options
#

SUPPORTED_X86_64_MACHINE_CONFIGS = NONE
SUPPORTED_X86_64H_MACHINE_CONFIGS = NONE

ifneq ($(findstring _Sim,$(RC_ProjectName)),)
SUPPORTED_ARM_MACHINE_CONFIGS = NONE
SUPPORTED_ARM64_MACHINE_CONFIGS = NONE
else ifneq ($(findstring _host,$(RC_ProjectName)),)
SUPPORTED_ARM_MACHINE_CONFIGS = NONE
SUPPORTED_ARM64_MACHINE_CONFIGS = NONE
else
SUPPORTED_ARM_MACHINE_CONFIGS = NONE
SUPPORTED_ARM64_MACHINE_CONFIGS = BCM2837 T6000 T8101 VMAPPLE

endif

#
# Setup up *_LC variables during recursive invocations
#

ifndef CURRENT_ARCH_CONFIG_LC
	export CURRENT_ARCH_CONFIG_LC	:= $(shell printf "%s" "$(CURRENT_ARCH_CONFIG)" | $(TR) A-Z a-z)
endif

ifndef CURRENT_KERNEL_CONFIG_LC
	export CURRENT_KERNEL_CONFIG_LC := $(shell printf "%s" "$(CURRENT_KERNEL_CONFIG)" | $(TR) A-Z a-z)
endif

ifndef CURRENT_MACHINE_CONFIG_LC
	export CURRENT_MACHINE_CONFIG_LC := $(shell printf "%s" "$(CURRENT_MACHINE_CONFIG)" | $(TR) A-Z a-z)
endif

#
# Component List
#
COMPONENT_LIST	= osfmk bsd libkern iokit pexpert libsa security san
COMPONENT	= $(if $(word 2,$(subst /, ,$(RELATIVE_SOURCE_PATH))),$(word 2,$(subst /, ,$(RELATIVE_SOURCE_PATH))),$(firstword $(subst /, ,$(RELATIVE_SOURCE_PATH))))
COMPONENT_IMPORT_LIST = $(filter-out $(COMPONENT),$(COMPONENT_LIST))

MACHINE_FLAGS_ARM64_T8101 = -DARM64_BOARD_CONFIG_T8101_T8103			-mcpu=apple-a14
MACHINE_FLAGS_ARM64_T6000 = -DARM64_BOARD_CONFIG_T6000 			-mcpu=apple-a14
MACHINE_FLAGS_ARM64_VMAPPLE = -DARM64_BOARD_CONFIG_VMAPPLE              -march=armv8.5a
MACHINE_FLAGS_ARM64_BCM2837 = -DARM64_BOARD_CONFIG_BCM2837


#
# Deployment target flag
#
ifeq ($(PLATFORM),MacOSX)
    DEPLOYMENT_TARGET_FLAGS = -mmacosx-version-min=$(SDKVERSION) -DXNU_TARGET_OS_OSX
    DEPLOYMENT_LINKER_FLAGS = -Wl,-macosx_version_min,$(SDKVERSION)
else ifeq ($(PLATFORM),DriverKit)
    DEPLOYMENT_TARGET_FLAGS = -target apple-driverkit$(SDKVERSION) -DXNU_TARGET_OS_OSX
    DEPLOYMENT_LINKER_FLAGS = -Wl,-target,apple-driverkit$(SDKVERSION)
else ifeq ($(PLATFORM),WatchOS)
    DEPLOYMENT_TARGET_FLAGS = -mwatchos-version-min=$(SDKVERSION) -DXNU_TARGET_OS_WATCH
    DEPLOYMENT_LINKER_FLAGS =
else ifeq ($(PLATFORM),tvOS)
    DEPLOYMENT_TARGET_FLAGS = -mtvos-version-min=$(SDKVERSION) -DXNU_TARGET_OS_TV
    DEPLOYMENT_LINKER_FLAGS =
else ifeq ($(PLATFORM),AppleTVOS)
    DEPLOYMENT_TARGET_FLAGS = -mtvos-version-min=$(SDKVERSION) -DXNU_TARGET_OS_TV
else ifeq ($(PLATFORM),BridgeOS)
    DEPLOYMENT_TARGET_FLAGS = -mbridgeos-version-min=$(SDKVERSION) -DXNU_TARGET_OS_BRIDGE
    DEPLOYMENT_LINKER_FLAGS =
else ifneq ($(filter $(SUPPORTED_EMBEDDED_PLATFORMS),$(PLATFORM)),)
    DEPLOYMENT_TARGET_FLAGS = -miphoneos-version-min=$(SDKVERSION) -DXNU_TARGET_OS_IOS
    DEPLOYMENT_LINKER_FLAGS = -Wl,-ios_version_min,$(SDKVERSION)
else ifneq ($(filter $(SUPPORTED_SIMULATOR_PLATFORMS),$(PLATFORM)),)
    DEPLOYMENT_TARGET_FLAGS =
    DEPLOYMENT_LINKER_FLAGS =
else
    DEPLOYMENT_TARGET_FLAGS =
    DEPLOYMENT_LINKER_FLAGS =
endif

DEPLOYMENT_TARGET_DEFINES = -DPLATFORM_$(PLATFORM)


ifneq ($(RC_ENABLE_PRODUCT_INFO_FILTER),)
SEED_DEFINES += -DRC_ENABLE_XNU_PRODUCT_INFO_FILTER
else
SEED_DEFINES += -URC_ENABLE_XNU_PRODUCT_INFO_FILTER
endif

#
# Standard defines list
#
DEFINES = -DAPPLE -DKERNEL -DKERNEL_PRIVATE -DXNU_KERNEL_PRIVATE \
	-DPRIVATE -D__MACHO__=1 -Dvolatile=__volatile -DXNU_KERN_EVENT_DATA_IS_VLA \
	-DCURRENT_MACHINE_CONFIG_LC=$(CURRENT_MACHINE_CONFIG_LC) \
	$(CONFIG_DEFINES) $(SEED_DEFINES)

# Enable caching with `make CCACHE=ccache`
# This intentionally does not override $(CC) because that will confuse
# utilities like mig.
CCACHE ?=

#
# Compiler command
#
KCC  = $(CCACHE) $(CC)
KC++ = $(CCACHE) $(CXX)

GENASSYM_KCC = $(CCACHE) $(CC)

#
# Compiler warning flags
#

USE_WERROR := 1
ifneq ($(BUILD_WERROR),)
USE_WERROR := $(BUILD_WERROR)
endif

ifeq ($(USE_WERROR),1)
WERROR := -Werror
endif

# Shared C/C++ warning flags
# NOTE: order matters here.  -Wno-xxx goes before opt-in of ones we want
WARNFLAGS_STD := \
	-Weverything \
	-Wundef-prefix=TARGET_OS_ \
	-Wno-pedantic \
	$(WERROR) \
	-Wno-bad-function-cast \
	-Wno-c++-compat \
	-Wno-c++98-compat \
	-Wno-conditional-uninitialized \
	-Wno-covered-switch-default \
	-Wno-disabled-macro-expansion \
	-Wno-documentation-unknown-command \
	-Wno-extra-semi-stmt \
	-Wno-format-non-iso \
	-Wno-format-nonliteral \
	-Wno-language-extension-token \
	-Wno-missing-variable-declarations \
	-Wno-packed \
	-Wno-padded \
	-Wno-partial-availability \
	-Wno-reserved-id-macro \
	-Wno-shift-sign-overflow \
	-Wno-switch-enum \
	-Wno-undef \
	-Wno-unused-macros \
	-Wno-used-but-marked-unused \
	-Wno-variadic-macros \
	-Wno-vla \
	-Wno-zero-length-array

# When a new clang has new warnings disable them here until the kernel is fixed.
WARNFLAGS_STD := $(WARNFLAGS_STD) \
	-Wno-unknown-warning-option \
	-Wno-anon-enum-enum-conversion \
	-Wno-error=enum-enum-conversion \
	-Wno-error=c99-designator \
	-Wno-error=reorder-init-list

# Hand-written sign conversion diagnostics are resolved, but the
# auto-generated ones need mig and iig to be updated to fix.  Disable the
# diagnostic here until we've completed that:
WARNFLAGS_STD := $(WARNFLAGS_STD) \
	-Wno-sign-compare \
	-Wno-sign-conversion

# Opt-ins:
WARNFLAGS_STD := $(WARNFLAGS_STD) \
	-Wpointer-arith

CWARNFLAGS_STD = \
	$(WARNFLAGS_STD)



# Can be overridden in Makefile.template or Makefile.$arch
export CWARNFLAGS ?= $(CWARNFLAGS_STD)

define add_perfile_cflags
$(1)_CWARNFLAGS_ADD += $2
endef

define rm_perfile_cflags
$(1)_CFLAGS_RM += $2
endef

CXXWARNFLAGS_STD = \
	$(WARNFLAGS_STD) \
	-Wno-c++98-compat-pedantic \
	-Wno-exit-time-destructors \
	-Wno-global-constructors \
	-Wno-old-style-cast

# Can be overridden in Makefile.template or Makefile.$arch
export CXXWARNFLAGS ?= $(CXXWARNFLAGS_STD)

define add_perfile_cxxflags
$(1)_CXXWARNFLAGS_ADD += $2
endef

#
# Default ARCH_FLAGS, for use with compiler/linker/assembler/mig drivers

ARCH_FLAGS_X86_64	  = -arch x86_64
ARCH_FLAGS_X86_64H	  = -arch x86_64h

ifeq ($(RC_ProjectName),xnu_libraries)
WILL_BUILD_STATIC_KC := 1
BUILD_STATIC_LINK := 1
BUILD_XNU_LIBRARY := 1
RC_NONARCH_CFLAGS += -D__BUILDING_XNU_LIBRARY__=1
endif

ifneq ($(filter ARM ARM64,$(CURRENT_ARCH_CONFIG)),)

ifneq ($(findstring _Sim,$(RC_ProjectName)),)
ARCH_FLAGS_ARM64          = -arch arm64e
else ifneq ($(findstring _host,$(RC_ProjectName)),)
ARCH_FLAGS_ARM64          = -arch arm64e
else

ifndef ARCH_STRING_FOR_CURRENT_MACHINE_CONFIG

ifneq ($(EMBEDDED_DEVICE_MAP),)
export ARCH_STRING_FOR_CURRENT_MACHINE_CONFIG := $(shell $(EMBEDDED_DEVICE_MAP) -db $(EDM_DBPATH) -query SELECT DISTINCT KernelMachOArchitecture FROM Targets WHERE KernelPlatform IS \"$(CURRENT_MACHINE_CONFIG_LC)\" LIMIT 1 || echo UNKNOWN )
else
# Without embdedded device map, use a default arch string
export ARCH_STRING_FOR_CURRENT_MACHINE_CONFIG := $(shell echo $(CURRENT_ARCH_CONFIG) | tr A-Z a-z)
ifneq ($(filter ARM64,$(CURRENT_ARCH_CONFIG)),)
export ARCH_STRING_FOR_CURRENT_MACHINE_CONFIG := arm64e
endif
endif
endif

#
# This can have false negatives, and is used to avoid calling CTF when we'll build a static KC
#
ifndef WILL_BUILD_STATIC_KC
ifneq ($(EMBEDDED_DEVICE_MAP),)
export WILL_BUILD_STATIC_KC := $(shell $(EMBEDDED_DEVICE_MAP) -db $(EDM_DBPATH)	\
				-query 'SELECT COUNT(*) != 0 FROM Targets WHERE KernelPlatform IS "$(CURRENT_MACHINE_CONFIG_LC)" \
					AND (KernelMachOArchitecture LIKE "arm64e" OR ProductType LIKE "iphone10,%")')
else
export WILL_BUILD_STATIC_KC := 0
endif
endif

BUILD_STATIC_LINK := 1

ARCH_FLAGS_ARM		  = -arch $(ARCH_STRING_FOR_CURRENT_MACHINE_CONFIG)
ARCH_FLAGS_ARM64	  = -arch $(ARCH_STRING_FOR_CURRENT_MACHINE_CONFIG)

endif

else
# non arm machine config string
ifndef ARCH_STRING_FOR_CURRENT_MACHINE_CONFIG
export ARCH_STRING_FOR_CURRENT_MACHINE_CONFIG := $(shell echo $(CURRENT_ARCH_CONFIG) | tr A-Z a-z)
endif

endif

#
# Default CFLAGS
#
ifdef RC_NONARCH_CFLAGS
OTHER_CFLAGS = $(RC_NONARCH_CFLAGS)
endif

#
# Debug info
#
DSYMINFODIR	= Contents
DSYMKGMACROSDIR	= Contents/Resources
DSYMLLDBMACROSDIR = Contents/Resources/Python
DSYMDWARFDIR	= Contents/Resources/DWARF

DEBUG_CFLAGS := -g
BUILD_DSYM := 1

#
# We must not use -fno-keep-inline-functions, or it will remove the dtrace
# probes from the kernel.
#
CFLAGS_GEN = $(DEBUG_CFLAGS) -nostdinc \
	-ferror-limit=10000 \
	-fno-builtin \
	-fno-common \
	-ftrivial-auto-var-init=zero \
	-enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang \
	-fsigned-bitfields \
	-fmerge-all-constants \
	-fno-c++-static-destructors \
	$(OTHER_CFLAGS)

CFLAGS_RELEASE	=
CFLAGS_DEVELOPMENT	=
CFLAGS_DEBUG	=
CFLAGS_KASAN = $(CFLAGS_DEVELOPMENT)
CFLAGS_PROFILE	=  -pg

CFLAGS_X86_64	= -Dx86_64 -DX86_64 -D__X86_64__ -DLP64 \
				-DPAGE_SIZE_FIXED -mkernel -msoft-float

CFLAGS_X86_64H = $(CFLAGS_X86_64)

CFLAGS_ARM	= -Darm -DARM -D__ARM__ -DPAGE_SIZE_FIXED \
			-momit-leaf-frame-pointer -fno-strict-aliasing -D__API__=v4

LARGE_MEMORY_DEFINE=-UARM_LARGE_MEMORY
ARM64_PLKSEG_ADDR  =0xfffffff004004000
ARM64_LINK_ADDR    =0xfffffff007004000

# Use ARM_LARGE_MEMORY config for all MacOSX targets.
ifneq ($(filter $(PLATFORM),MacOSX),)
LARGE_MEMORY_DEFINE=-DARM_LARGE_MEMORY=1
ARM64_PLKSEG_ADDR  =0xfffffe0004004000
ARM64_LINK_ADDR    =0xfffffe0007004000
endif


CFLAGS_ARM64	= -Darm64 -DARM64 -D__ARM64__ -DLP64 -DPAGE_SIZE_FIXED -DVM_KERNEL_LINK_ADDRESS=$(ARM64_LINK_ADDR) \
			$(LARGE_MEMORY_DEFINE) -momit-leaf-frame-pointer -fno-strict-aliasing -D__API__=v4 -mkernel

CFLAGS_RELEASEX86_64 = -O2
CFLAGS_DEVELOPMENTX86_64 = -O2
CFLAGS_KASANX86_64 = $(CFLAGS_DEVELOPMENTX86_64)
# No space optimization for the DEBUG kernel for the benefit of gdb:
CFLAGS_DEBUGX86_64 = -O0
CFLAGS_PROFILEX86_64 = -O2

CFLAGS_RELEASEX86_64H = -O2
CFLAGS_DEVELOPMENTX86_64H = -O2
CFLAGS_KASANX86_64H = $(CFLAGS_DEVELOPMENTX86_64H)
# No space optimization for the DEBUG kernel for the benefit of gdb:
CFLAGS_DEBUGX86_64H = -O0
CFLAGS_PROFILEX86_64H = -O2

CFLAGS_RELEASEARM = -O2
CFLAGS_DEVELOPMENTARM = -O2
CFLAGS_DEBUGARM = -O0
CFLAGS_PROFILEARM = -O2

CFLAGS_RELEASEARM64 = -O2
CFLAGS_DEVELOPMENTARM64 = -O2
CFLAGS_KASANARM64 = $(CFLAGS_DEVELOPMENTARM64)
CFLAGS_DEBUGARM64 = -O0
CFLAGS_PROFILEARM64 = -O2

#
# bound-checking support
#
# BOUND_CHECKS=0 disables, else support is dynamically detected
#
### ifndef BOUND_CHECKS
### ifeq ($(shell $(CC) -E -fbounds-attributes /dev/null 2>/dev/null && echo 1),1)
###     export BOUND_CHECKS := 1
### else
###     export BOUND_CHECKS := 0
### endif
### endif # ifndef BOUND_CHECKS
ifeq ($(BOUND_CHECKS),1)
CFLAGS_BOUND_CHECKS = -DXNU_BOUND_CHECKS=1 -fbounds-attributes
ifneq ($(shell $(CC) -E -fbounds-attributes /dev/null 2>/dev/null && echo 1),1)
    $(error "your toolchain doesn't support bound checking")
endif
else
CFLAGS_BOUND_CHECKS = -UXNU_BOUND_CHECKS
endif

#
# Sanitizers Support (KASan, UBSan)
#

# Which kernel configurations are built with KCOV enabled.
KCOV_RUNTIME := KASAN

ifneq ($(filter RELEASE, $(KCOV_RUNTIME)),)
$(error "Sanitizer runtime should not be eabled for RELEASE kernel.")
endif


SAN=0

# KASan support
#

ifeq ($(CURRENT_KERNEL_CONFIG),KASAN)
# KASan kernel config implicitly enables the KASan instrumentation.
# Instrumentation for other sanitizers is enabled explicitly at build time.
KASAN = 1
endif

ifeq ($(KASAN),1)
SAN=1
BUILD_LTO=0

# KASAN_CLASSIC is currently the default
KASAN_CLASSIC=1

KASAN_BLACKLIST=$(OBJROOT)/san/kasan-blacklist-$(CURRENT_ARCH_CONFIG_LC)

# KASAN supports two different runtime models, KASAN_CLASSIC and KASAN_TBI.
# Shadow map scale differs between the two. With KASAN_SCALE=N, the shadow memory consumes 1/2^N of
# the virtual address space.
ifeq ($(KASAN_TBI), 1)
KASAN_SCALE=4
KASAN_OFFSET_ARM64=0xf000000000000000
KASAN_OFFSET=$(KASAN_OFFSET_ARM64)
CFLAGS_KASAN_TBI = -fsanitize=kernel-hwaddress \
        -fsanitize-blacklist=$(KASAN_BLACKLIST) \
        -mllvm -hwasan-recover=0 \
        -mllvm -hwasan-mapping-offset=$(KASAN_OFFSET) \
        -mllvm -hwasan-instrument-atomics=0 \
        -mllvm -hwasan-instrument-stack=0 \
	-mllvm -hwasan-uar-retag-to-zero=1 \
        -mllvm -hwasan-generate-tags-with-calls=1 \
        -mllvm -hwasan-instrument-with-calls=0 \
        -mllvm -hwasan-memory-access-callback-prefix="__asan_"

CFLAGS_KASAN_MODEL_TAG=-DKASAN_TBI=1
CFLAGS_KASAN_MODEL=$(CFLAGS_KASAN_TBI)
else ifeq ($(KASAN_CLASSIC), 1)
KASAN_SCALE=3
KASAN_OFFSET_ARM64=0xe000000000000000
# To calculate the kasan offset, subtract the lowest KVA to sanitize, shifted right by 3 bits,
# from the base address of the kasan shadow area, (e.g. solve the following equation:
# OFFSET = {VA mapped by the first KASAN PML4 [Currently #494]} - (LOWEST_KVA >> 3)
# OFFSET = (0ULL - (512GiB * (512 - 494))) - (LOWEST_SAN_KVA >> 3)
# OFFSET = FFFFF70000000000 - ((0ULL - (512GiB * (512 - 496))) >> 3) [PML4 #496 is the first possible KVA]
# OFFSET = FFFFF70000000000 - (FFFFF80000000000 >> 3)
# OFFSET = DFFFF80000000000
# ).
KASAN_OFFSET_X86_64=0xdffff80000000000
KASAN_OFFSET_X86_64H=$(KASAN_OFFSET_X86_64)
KASAN_OFFSET=$($(addsuffix $(CURRENT_ARCH_CONFIG),KASAN_OFFSET_))

CFLAGS_KASAN_CLASSIC= -fsanitize=address \
                -mllvm -asan-globals-live-support \
                -mllvm -asan-mapping-offset=$(KASAN_OFFSET) \
                -fsanitize-blacklist=$(KASAN_BLACKLIST)

CFLAGS_KASAN_MODEL_TAG = -DKASAN_CLASSIC=1
CFLAGS_KASAN_MODEL = $(CFLAGS_KASAN_CLASSIC)

else
$(error No KASAN model specified)
endif

CFLAGS_GEN += -DKASAN=1 -DKASAN_OFFSET=$(KASAN_OFFSET) -DKASAN_SCALE=$(KASAN_SCALE) \
	$(CFLAGS_KASAN_MODEL) $(CFLAGS_KASAN_MODEL_TAG)

endif

# UBSan
#
# The Undefined Behavior sanitizer runtime is always built as part of, and only for,
# KASAN variants. UBSan instrumentation is disabled by default and only enabled explicitly
# when building with UBSAN=1.
#
# On iOS RELEASE and DEVELOPMENT kernels, a subset of UBSan checks is enabled along with a minimal
# runtime that emulates trap mode (but makes it recoverable).

ifeq ($(KASAN), 1)

ifeq ($(UBSAN),1)
SAN=1

UBSAN_RUNTIME =
UBSAN_CHECKS += signed-integer-overflow shift pointer-overflow bounds object-size # non-fatal (calls runtime, can return)
# UBSAN_CHECKS = undefined nullability unsigned-integer-overflow # everything
UBSAN_CHECKS_FATAL =                                           # fatal (calls runtime, must not return)
UBSAN_CHECKS_TRAP = vla-bound builtin                          # emit a trap instruction (no runtime support)
UBSAN_DISABLED += vptr function     # requires unsupported C++ runtime

# UBSan alignment + KASan code size is too large
# UBSan unreachable doesn't play nice with ASan (40723397)
UBSAN_DISABLED += alignment unreachable

endif

else

# DEVELOPMENT and RELEASE variants
ifeq ($(PLATFORM),iPhoneOS)

# Currently we have to keep alive two separated UBSAN runtimes (minimal for DEVELOPMENT,
# full for KASAN). This implies that we cannot use CFLAGS_$(CURRENT_KERNEL_CONFIG), because
# CFLAGS_DEVELOPMENT is folded into CFLAGS_KASAN. For the time being we leave this check here,
# as we work (independently) to both break the CFLAGS direct dependency and commonize the
# sanitizer runtimes.
UBSAN_MINIMAL_RUNTIME := DEVELOPMENT DEBUG
ifneq ($(filter $(CURRENT_KERNEL_CONFIG), $(UBSAN_MINIMAL_RUNTIME)),)

# This is (unfortunately) intentional. Currently the "kasan" blacklist, which folds both
# ubsan and kasan specific files, is generated for all builds during the
# setup phase. The blacklist file itself is divided per-sanitizer, so won't
# affect the UBSAN build outside of the entries that are legitimately
# intended for it.
UBSAN_BLACKLIST=$(OBJROOT)/san/kasan-blacklist-$(CURRENT_ARCH_CONFIG_LC)

UBSAN_CHECKS = signed-integer-overflow
UBSAN_RUNTIME = -fsanitize-minimal-runtime -fsanitize-blacklist=$(UBSAN_BLACKLIST)
UBSAN_CHECKS_TRAP =
UBSAN_CHECKS_FATAL =
UBSAN_DISABLED =
endif
endif

endif

CFLAGS_GEN += $(UBSAN_RUNTIME)
CFLAGS_GEN += $(foreach x,$(UBSAN_CHECKS) $(UBSAN_CHECKS_FATAL) $(UBSAN_CHECKS_TRAP),-fsanitize=$(x))
CFLAGS_GEN += $(foreach x,$(UBSAN_CHECKS_FATAL),-fno-sanitize-recover=$(x))
CFLAGS_GEN += $(foreach x,$(UBSAN_CHECKS_TRAP),-fsanitize-trap=$(x))
CFLAGS_GEN += $(foreach x,$(UBSAN_DISABLED),-fno-sanitize=$(x))

ifeq ($(KSANCOV),1)
# Enable SanitizerCoverage instrumentation in xnu
SAN = 1
KCOV_BLACKLIST := $(OBJROOT)/san/kcov-blacklist-$(CURRENT_ARCH_CONFIG_LC)
KCOV_CFLAGS := -fsanitize-coverage=trace-pc-guard -fsanitize-coverage-blocklist=$(KCOV_BLACKLIST)
CFLAGS_GEN += $(KCOV_CFLAGS) -DKSANCOV=1
endif

ifeq ($(SAN),1)
CFLAGS_GEN += -fsanitize-blacklist=$(OBJROOT)/san/kasan-blacklist-$(CURRENT_ARCH_CONFIG_LC)
endif


CFLAGS	= $(CFLAGS_GEN) \
		  $($(addsuffix $(CURRENT_MACHINE_CONFIG),MACHINE_FLAGS_$(CURRENT_ARCH_CONFIG)_)) \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG),ARCH_FLAGS_)) \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG),CFLAGS_)) \
		  $($(addsuffix $(CURRENT_KERNEL_CONFIG),CFLAGS_)) \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG), $(addsuffix $(CURRENT_KERNEL_CONFIG),CFLAGS_))) \
		  $(DEPLOYMENT_TARGET_FLAGS) \
		  $(DEPLOYMENT_TARGET_DEFINES) \
		  $(BOUND_CHECKS_DEFINES) \
		  $(DEFINES)

#
# Default C++ flags
#

OTHER_CXXFLAGS	=

CXXFLAGS_GEN  = -std=gnu++1z -fsized-deallocation -fapple-kext $(OTHER_CXXFLAGS)

CXXFLAGS      = $(CXXFLAGS_GEN) \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG),CXXFLAGS_)) \
		  $($(addsuffix $(CURRENT_KERNEL_CONFIG),CXXFLAGS_))

#
# Assembler command
#
AS	= $(CCACHE) $(CC)
S_KCC	= $(CC)

#
# Default SFLAGS
#
SFLAGS_GEN = -D__ASSEMBLER__ -DASSEMBLER $(OTHER_CFLAGS)

SFLAGS_RELEASE	=
SFLAGS_DEVELOPMENT	=

# When making non-compatible changes to the XNU runtime, it can be useful to build
# a KASAN kernel + runtime, but linked against a DEVELOPMENT kernel cache.
# Uncomment the lines below to be able to build development, but passing KASAN=1.
# #_ifeq ($(KASAN),1)
# SFLAGS_DEVELOPMENT += -DKASAN=1
# #_endif

SFLAGS_KASAN = $(SFLAGS_DEVELOPMENT) -DKASAN=1
SFLAGS_DEBUG	=
SFLAGS_PROFILE	=

SFLAGS_X86_64	= $(CFLAGS_X86_64)
SFLAGS_X86_64H	= $(CFLAGS_X86_64H)
SFLAGS_ARM	= $(CFLAGS_ARM)
SFLAGS_ARM64	= $(CFLAGS_ARM64)

SFLAGS	= $(SFLAGS_GEN) \
		  $($(addsuffix $(CURRENT_MACHINE_CONFIG),MACHINE_FLAGS_$(CURRENT_ARCH_CONFIG)_)) \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG),ARCH_FLAGS_)) \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG),SFLAGS_)) \
		  $($(addsuffix $(CURRENT_KERNEL_CONFIG),SFLAGS_)) \
		  $(DEPLOYMENT_TARGET_FLAGS) \
		  $(DEPLOYMENT_TARGET_DEFINES) \
		  $(DEFINES)

#
# Linker command
#
LD	= $(KC++) -nostdlib

#
# Default LDFLAGS
#
# Availability of DWARF allows DTrace CTF (compressed type format) to be constructed.
# ctf_insert creates the CTF section.  It needs reserved padding in the
# headers for the load command segment and the CTF section structures.
#
LDFLAGS_KERNEL_GEN = \
	-nostdlib \
	-fapple-kext \
	-Wl,-e,__start \
	-Wl,-sectalign,__TEXT,__text,0x1000 \
	-Wl,-sectalign,__DATA,__percpu,0x80 \
	-Wl,-sectalign,__DATA,__common,0x1000 \
	-Wl,-sectalign,__DATA,__bss,0x1000 \
	-Wl,-sectcreate,__PRELINK_TEXT,__text,/dev/null \
	-Wl,-segprot,__PRELINK_TEXT,r-x,r-x \
	-Wl,-sectcreate,__PRELINK_INFO,__info,/dev/null \
	-Wl,-new_linker \
	-Wl,-pagezero_size,0x0 \
	-Wl,-version_load_command \
	-Wl,-function_starts \
	-Wl,-headerpad,152

# LDFLAGS_KERNEL_SDK	= -L$(SDKROOT)/usr/local/lib/kernel -lfirehose_kernel
LDFLAGS_KERNEL_SDK	= -L$(SDKROOT)/usr/local/lib/kernel

LDFLAGS_KERNEL_RELEASE	=
LDFLAGS_KERNEL_DEVELOPMENT     =
LDFLAGS_KERNEL_KASAN = $(LDFLAGS_KERNEL_DEVELOPMENT)
LDFLAGS_KERNEL_DEBUG	=
LDFLAGS_KERNEL_PROFILE	=

# KASLR static slide config:
ifndef SLIDE
SLIDE=0x00
endif
KERNEL_MIN_ADDRESS      = 0xffffff8000000000
KERNEL_BASE_OFFSET      = 0x100000
# POSIX shells use signed long for their arithmetic expressions. However,
# we're dealing with uintptr_t values here, so explicitly use bash which
# is known to be able to handle such larger values. ksh also works; dash
# and zsh both fail with different results (zsh even warns you).
KERNEL_STATIC_SLIDE     = $(shell $(BASH) -c 'printf "0x%016x" \
			  $$(( $(SLIDE) << 21 ))')
KERNEL_STATIC_BASE      = $(shell $(BASH) -c 'printf "0x%016x" \
			  $$(( $(KERNEL_MIN_ADDRESS) + $(KERNEL_BASE_OFFSET) ))')
KERNEL_HIB_SECTION_BASE = $(shell $(BASH) -c 'printf "0x%016x" \
			  $$(( $(KERNEL_STATIC_BASE) + $(KERNEL_STATIC_SLIDE) ))')
KERNEL_TEXT_BASE        = $(shell $(BASH) -c 'printf "0x%016x" \
			  $$(( $(KERNEL_HIB_SECTION_BASE) + 0x100000 ))')

LDFLAGS_KERNEL_RELEASEX86_64 = \
	-Wl,-pie \
	-Wl,-segaddr,__HIB,$(KERNEL_HIB_SECTION_BASE) \
	-Wl,-image_base,$(KERNEL_TEXT_BASE) \
	-Wl,-seg_page_size,__TEXT,0x200000 \
	-Wl,-sectalign,__HIB,__bootPT,0x1000 \
	-Wl,-sectalign,__HIB,__desc,0x1000 \
	-Wl,-sectalign,__HIB,__data,0x1000 \
	-Wl,-sectalign,__HIB,__text,0x1000 \
	-Wl,-sectalign,__HIB,__const,0x1000 \
	-Wl,-sectalign,__HIB,__bss,0x1000 \
	-Wl,-sectalign,__HIB,__common,0x1000 \
	-Wl,-sectalign,__HIB,__llvm_prf_cnts,0x1000 \
	-Wl,-sectalign,__HIB,__llvm_prf_names,0x1000 \
	-Wl,-sectalign,__HIB,__llvm_prf_data,0x1000 \
	-Wl,-sectalign,__HIB,__textcoal_nt,0x1000 \
	-Wl,-sectalign,__HIB,__cstring,0x1000 \
	-Wl,-rename_section,__DATA,__const,__DATA_CONST,__const \
	-Wl,-segprot,__DATA_CONST,r--,r-- \
	-Wl,-rename_section,__KLD,__const,__KLDDATA,__const \
	-Wl,-rename_section,__KLD,__cstring,__KLDDATA,__cstring \
	-Wl,-segprot,__KLDDATA,rw-,rw- \
	-Wl,-segprot,__KLD,r-x,r-x \
	-Wl,-no_zero_fill_sections \
	$(LDFLAGS_NOSTRIP_FLAG)

ifeq ($(SAN),1)
LDFLAGS_KERNEL_RELEASEX86_64 += \
	-Wl,-sectalign,__HIB,__cstring,0x1000
endif

ifeq ($(KSANCOV),1)
LDFLAGS_KERNEL_RELEASEX86_64 += \
	-Wl,-sectalign,__HIB,__sancov_guards,0x1000 \
	-Wl,-sectalign,__HIB,__sancov_pcs,0x1000
endif

# Define KERNEL_BASE_OFFSET so known at compile time:
CFLAGS_X86_64 += -DKERNEL_BASE_OFFSET=$(KERNEL_BASE_OFFSET)
CFLAGS_X86_64H += -DKERNEL_BASE_OFFSET=$(KERNEL_BASE_OFFSET)

LDFLAGS_KERNEL_DEBUGX86_64 = $(LDFLAGS_KERNEL_RELEASEX86_64)
LDFLAGS_KERNEL_DEVELOPMENTX86_64 = $(LDFLAGS_KERNEL_RELEASEX86_64)
LDFLAGS_KERNEL_KASANX86_64 = $(LDFLAGS_KERNEL_DEVELOPMENTX86_64) \
	-Wl,-sectalign,__HIB,__asan_globals,0x1000 \
	-Wl,-sectalign,__HIB,__asan_liveness,0x1000 \
	-Wl,-sectalign,__HIB,__mod_term_func,0x1000 \
	-Wl,-rename_section,__HIB,__mod_init_func,__NULL,__mod_init_func \
	-Wl,-rename_section,__HIB,__eh_frame,__NULL,__eh_frame
LDFLAGS_KERNEL_PROFILEX86_64 = $(LDFLAGS_KERNEL_RELEASEX86_64)

LDFLAGS_KERNEL_RELEASEX86_64H = $(LDFLAGS_KERNEL_RELEASEX86_64)
LDFLAGS_KERNEL_DEBUGX86_64H = $(LDFLAGS_KERNEL_RELEASEX86_64H)
LDFLAGS_KERNEL_DEVELOPMENTX86_64H = $(LDFLAGS_KERNEL_RELEASEX86_64H)
LDFLAGS_KERNEL_KASANX86_64H = $(LDFLAGS_KERNEL_KASANX86_64)
LDFLAGS_KERNEL_PROFILEX86_64H = $(LDFLAGS_KERNEL_RELEASEX86_64H)

# We preload ___udivmoddi4 in order to work around an issue with building
# LTO on armv7.
LDFLAGS_KERNEL_GENARM = \
	-Wl,-pie \
	-Wl,-static \
	-Wl,-image_base,0x80001000 \
	-Wl,-sectalign,__DATA,__const,0x1000 \
	-Wl,-u,___udivmoddi4 \
	-Wl,-rename_section,__KLD,__const,__KLDDATA,__const \
	-Wl,-rename_section,__KLD,__cstring,__KLDDATA,__cstring \
	-Wl,-segprot,__KLDDATA,rw-,rw- \
	-Wl,-segprot,__KLD,r-x,r-x

LDFLAGS_KERNEL_RELEASEARM     = \
	$(LDFLAGS_KERNEL_GENARM) \
	$(LDFLAGS_KERNEL_STRIP_LTO)

LDFLAGS_KERNEL_ONLY_CONFIG_RELEASEARM     = \
	-Wl,-exported_symbols_list,$(TARGET)/all-kpi.exp

LDFLAGS_KERNEL_DEVELOPMENTARM     = \
	$(LDFLAGS_KERNEL_GENARM) \
	$(LDFLAGS_NOSTRIP_FLAG)

LDFLAGS_KERNEL_ONLY_CONFIG_DEVELOPMENTARM =

LDFLAGS_KERNEL_DEBUGARM = $(LDFLAGS_KERNEL_DEVELOPMENTARM)
LDFLAGS_KERNEL_ONLY_CONFIG_DEBUGARM = $(LDFLAGS_KERNEL_ONLY_CONFIG_DEVELOPMENTARM)

# Offset image base by page to have iBoot load kernel TEXT correctly.
# First page is used for various purposes : sleep token, reset vector.
# We also need a 32MB offset, as this is the minimum block mapping size
# for a 16KB page runtime, and we wish to use the first virtual block
# to map the low globals page.  We also need another 4MB to account for
# the address space reserved by L4 (because the reservation is not a
# multiple of the block size in alignment/length, we will implictly map
# it with our block mapping, and we therefore must reflect that the
# first 4MB of the block mapping for xnu do not belong to xnu).
# For the moment, kaliber has a unique memory layout (monitor at the top
# of memory).  Support this by breaking 16KB on other platforms and
# mandating 32MB alignment. Image base (i.e. __TEXT) must be 16KB
# aligned since ld64 will link with 16KB alignment for ARM64.
#
# We currently offset by an additional 32MB in order to reclaim memory.
# We need a dedicated virtual page for the low globals.  Our bootloader
# may have a significant chunk of memory (up to an L2 entry in size)
# that lies before the kernel.  The addition 32MB of virtual padding
# ensures that we have enough virtual address space to map all of that
# memory as part of the V-to-P mapping.
# 23355738 - put __PRELINK_TEXT first. We reserve enough room
# for 0x0000000003000000 = 48MB of kexts
#
# 0xfffffff000000000 (32MB range for low globals)
# 0xfffffff002000000 (32MB range to allow for large page physical slide)
# 0xfffffff004000000 (16KB range to reserve the first available page)
# 0xfffffff004004000 (48MB range for kexts)
# 0xfffffff007004000 (Start of xnu proper).
LDFLAGS_KERNEL_GENARM64 = \
	-Wl,-pie \
	-Wl,-static \
	-Wl,-segaddr,__PRELINK_TEXT,$(ARM64_PLKSEG_ADDR) \
	-Wl,-image_base,$(ARM64_LINK_ADDR) \
	\
	-Wl,-rename_section,__HIB,__text,__TEXT_EXEC,__hib_text \
	\
	-Wl,-rename_section,__HIB,__const,__DATA_CONST,__hib_const \
	-Wl,-rename_section,__HIB,__cstring,__DATA_CONST,__hib_const \
	-Wl,-rename_section,__HIB,__literal8,__DATA_CONST,__hib_const \
	-Wl,-rename_section,__HIB,__literal16,__DATA_CONST,__hib_const \
	\
	-Wl,-rename_segment,__HIB,__HIBDATA \
	\
	-Wl,-sectalign,__DATA,__const,0x4000 \
	-Wl,-sectalign,__DATA,__data,0x4000 \
	-Wl,-rename_section,__DATA,__mod_init_func,__DATA_CONST,__mod_init_func \
	-Wl,-rename_section,__DATA,__mod_term_func,__DATA_CONST,__mod_term_func \
	-Wl,-rename_section,__DATA,__auth_ptr,__DATA_CONST,__auth_ptr \
	-Wl,-rename_section,__DATA,__auth_got,__DATA_CONST,__auth_got \
	-Wl,-rename_section,__DATA,__const,__DATA_CONST,__const \
	-Wl,-segprot,__DATA_CONST,r--,r-- \
	-Wl,-rename_section,__KLD,__const,__KLDDATA,__const \
	-Wl,-rename_section,__KLD,__cstring,__KLDDATA,__cstring \
	-Wl,-segprot,__KLDDATA,rw-,rw- \
	-Wl,-segprot,__KLD,r-x,r-x \
	-Wl,-rename_section,__TEXT,__text,__TEXT_EXEC,__text \
	-Wl,-rename_section,__TEXT,__stubs,__TEXT_EXEC,__stubs \
	-Wl,-sectcreate,"__PLK_TEXT_EXEC",__text,/dev/null \
	-Wl,-sectcreate,__PRELINK_DATA,__data,/dev/null \
	-Wl,-sectcreate,"__PLK_DATA_CONST",__data,/dev/null \
	-Wl,-sectcreate,"__PLK_LLVM_COV",__llvm_covmap,/dev/null \
	-Wl,-sectcreate,"__PLK_LINKEDIT",__data,/dev/null

LDFLAGS_KERNEL_SEGARM64 = \
	-Wl,-rename_section,__PPLDATA,__const,__PPLDATA_CONST,__const \
	-Wl,-segment_order,__TEXT:__DATA_CONST:__LINKEDIT:__TEXT_EXEC:__KLD:__PPLTEXT:__PPLTRAMP:__PPLDATA_CONST:__LASTDATA_CONST:__LAST:__PPLDATA:__KLDDATA:__DATA:__HIBDATA:__BOOTDATA \
	-Wl,-segprot,__PPLTEXT,r-x,r-x  -Wl,-segprot,__PPLTRAMP,r-x,r-x -Wl,-segprot,__PPLDATA_CONST,r--,r-- -Wl,-segprot,__LASTDATA_CONST,r--,r-- -Wl,-segprot,__LAST,r-x,r-x \

LDFLAGS_KERNEL_RELEASEARM64     = \
	$(LDFLAGS_KERNEL_GENARM64) \
	$(LDFLAGS_KERNEL_SEGARM64) \
	$(LDFLAGS_KERNEL_STRIP_LTO)

LDFLAGS_KERNEL_ONLY_CONFIG_RELEASEARM64     = \
	-Wl,-exported_symbols_list,$(TARGET)/all-kpi.exp

LDFLAGS_KERNEL_DEVELOPMENTARM64     = \
	$(LDFLAGS_KERNEL_GENARM64) \
	$(LDFLAGS_KERNEL_SEGARM64) \
	$(LDFLAGS_NOSTRIP_FLAG)

LDFLAGS_KERNEL_ONLY_CONFIG_DEVELOPMENTARM64 =

LDFLAGS_KERNEL_KASANARM64 = $(LDFLAGS_KERNEL_DEVELOPMENTARM64)
LDFLAGS_KERNEL_DEBUGARM64 = $(LDFLAGS_KERNEL_DEVELOPMENTARM64)

LDFLAGS_KERNEL_ONLY_CONFIG_KASANARM64 = $(LDFLAGS_KERNEL_ONLY_CONFIG_DEVELOPMENTARM64)
LDFLAGS_KERNEL_ONLY_CONFIG_DEBUGARM64 = $(LDFLAGS_KERNEL_ONLY_CONFIG_DEVELOPMENTARM64)

#
# arm64e specific linker flags that should be used only when linking the kernel
# (and not the static kernel cache / kcgen)
#
LDFLAGS_KERNEL_ONLY_SUBARCH_arm64e = \
	-Wl,-add_split_seg_info \
	-Wl,-kernel

LDFLAGS_KERNEL_ONLY_SUBARCH_x86_64 = \
	-Wl,-add_split_seg_info \
	-Wl,-kernel
LDFLAGS_KERNEL_ONLY_SUBARCH_x86_64h = $(LDFLAGS_KERNEL_ONLY_SUBARCH_x86_64)

LDFLAGS_KERNEL	= $(LDFLAGS_KERNEL_GEN) \
		  $(LDFLAGS_KERNEL_SDK) \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG),ARCH_FLAGS_)) \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG),LDFLAGS_KERNEL_)) \
		  $($(addsuffix $(CURRENT_KERNEL_CONFIG),LDFLAGS_KERNEL_)) \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG), $(addsuffix $(CURRENT_KERNEL_CONFIG),LDFLAGS_KERNEL_))) \
		  $(DEPLOYMENT_TARGET_FLAGS)

LDFLAGS_KERNEL_ONLY  +=   \
		  $($(addsuffix $(CURRENT_ARCH_CONFIG), $(addsuffix $(CURRENT_KERNEL_CONFIG),LDFLAGS_KERNEL_ONLY_CONFIG_))) \
		  $($(addsuffix $(ARCH_STRING_FOR_CURRENT_MACHINE_CONFIG),LDFLAGS_KERNEL_ONLY_SUBARCH_)) \
		  -Wl,-alias_list,$(TARGET)/all-alias.exp \
		  -Wl,-sectcreate,__LINKINFO,__symbolsets,$(TARGET)/symbolsets.plist -Wl,-segprot,__LINKINFO,r--,r--

LDFILES_KERNEL_ONLY = $(TARGET)/all-kpi.exp $(TARGET)/all-alias.exp $(TARGET)/symbolsets.plist

#
# Default runtime libraries to be linked with the kernel
#
LD_KERNEL_LIBS	   = -lcc_kext
LD_KERNEL_ARCHIVES = $(LDFLAGS_KERNEL_SDK) -lfirehose_kernel
# Link opensource binary library
ifneq ($(filter T6000 T8101 VMAPPLE T6000 T8101 VMAPPLE,$(CURRENT_MACHINE_CONFIG)),)
	LDFLAGS_KERNEL_ONLY += -rdynamic -Wl,-force_load,$(KDKROOT)/System/Library/KernelSupport/lib$(CURRENT_MACHINE_CONFIG).os.$(CURRENT_KERNEL_CONFIG).a
endif

#
# DTrace support
#
ifndef DO_CTFMERGE
DO_CTFMERGE := 1
ifeq ($(CURRENT_KERNEL_CONFIG),RELEASE)
ifneq ($(PLATFORM),MacOSX)
DO_CTFMERGE := 0
endif
endif
ifneq ($(CURRENT_KERNEL_CONFIG),KASAN)
ifneq ($(PLATFORM),MacOSX)
ifeq ($(WILL_BUILD_STATIC_KC),1)
DO_CTFMERGE := 0
endif
endif
endif
endif # DO_CTFMERGE


#
# Default INCFLAGS
#
INCFLAGS_IMPORT	= $(patsubst %, -I$(OBJROOT)/EXPORT_HDRS/%, $(COMPONENT_IMPORT_LIST))
INCFLAGS_EXTERN	= -I$(SRCROOT)/EXTERNAL_HEADERS
INCFLAGS_GEN	= -I$(SRCROOT)/$(COMPONENT) -I$(OBJROOT)/EXPORT_HDRS/$(COMPONENT)
INCFLAGS_LOCAL	= -I.
INCFLAGS_SDK	= -I$(SDKROOT)/usr/local/include/kernel

INCFLAGS	= $(INCFLAGS_LOCAL) $(INCFLAGS_GEN) $(INCFLAGS_IMPORT) $(INCFLAGS_EXTERN) $(INCFLAGS_MAKEFILE) $(INCFLAGS_SDK)

#
# Default MIGFLAGS
#
MIGFLAGS	= $(DEFINES) $(INCFLAGS) -novouchers $($(addsuffix $(CURRENT_ARCH_CONFIG),CFLAGS_)) $($(addsuffix $(CURRENT_ARCH_CONFIG),ARCH_FLAGS_)) \
		$(DEPLOYMENT_TARGET_FLAGS)

# Support for LLVM Profile Guided Optimization (PGO)

ifeq ($(BUILD_PROFILE),1)
CFLAGS_GEN += -fprofile-instr-generate -DPROFILE
CXXFLAGS_GEN += -fprofile-instr-generate -DPROFILE
endif

ifdef USE_PROFILE
CFLAGS_GEN += -fprofile-instr-use=$(USE_PROFILE)
CXXFLAGS_GEN += -fprofile-instr-use=$(USE_PROFILE)
LDFLAGS_KERNEL_GEN += -fprofile-instr-use=$(USE_PROFILE)

CFLAGS_GEN += -Wno-error=profile-instr-out-of-date
endif

#
# Support for LLVM Link Time Optimization (LTO)
#
# LTO can be explicitly enabled or disabled with BUILD_LTO=1|0
# and defaults to enabled except for DEBUG kernels
#
# CFLAGS_NOLTO_FLAG is needed on a per-file basis (for files
# that deal poorly with LTO, or files that must be machine
# code *.o files for xnu to build (i.e, setsegname runs on
# them).
#
# LDFLAGS_NOSTRIP_FLAG is used to support configurations that
# do not utilize an export list.  For these configs to build,
# we need to prevent the LTO logic from dead stripping them.

LTO_ENABLED_RELEASE = 1
LTO_ENABLED_DEVELOPMENT = 1
LTO_ENABLED_DEBUG = 0
LTO_ENABLED_KASAN = 0

ifneq ($(BUILD_LTO),)
USE_LTO = $(BUILD_LTO)
else
USE_LTO = $(LTO_ENABLED_$(CURRENT_KERNEL_CONFIG))
endif

ifeq ($(USE_LTO),1)
CFLAGS_GEN	+= -flto
CXXFLAGS_GEN	+= -flto
LDFLAGS_KERNEL_LTO	= -Wl,-mllvm,-inline-threshold=100
LDFLAGS_KERNEL_GEN	+= $(LDFLAGS_KERNEL_LTO) -Wl,-object_path_lto,$(TARGET)/lto.o
LDFLAGS_NOSTRIP_FLAG = -rdynamic
LDFLAGS_KERNEL_STRIP_LTO = -Wl,-dead_strip,-no_dead_strip_inits_and_terms

CFLAGS_NOLTO_FLAG = -fno-lto
else
LDFLAGS_KERNEL_LTO =
LDFLAGS_NOSTRIP_FLAG =
LDFLAGS_KERNEL_STRIP_LTO =
CFLAGS_NOLTO_FLAG =
endif

ifeq ($(BUILD_JSON_COMPILATION_DATABASE),1)
BUILD_DSYM	:= 0
DO_CTFMERGE  	:= 0
KCC		= $(JSONCOMPILATIONDB) $(OBJPATH)/compile_commands.json $(PWD) $< $(CC)
KC++		= $(JSONCOMPILATIONDB) $(OBJPATH)/compile_commands.json $(PWD) $< $(CXX)
S_KCC		= $(JSONCOMPILATIONDB) $(OBJPATH)/compile_commands.json $(PWD) $< $(CC)
STRIP		= true
endif

#
# Default VPATH
#
export VPATH = .:$(SOURCE)



#
# Macros that control installation of kernel and its header files
#
# install flags for header files
#
INSTALL_FLAGS = -c -S -m 0444
DATA_INSTALL_FLAGS = -c -S -m 0644
DATA_INSTALL_FLAGS_RO = -c -S -m 0444
EXEC_INSTALL_FLAGS = -c -S -m 0755

#
# Header file destinations
#

ifeq ($(DRIVERKIT),1)
    SDKHEADERSROOT=$(DRIVERKITRUNTIMEROOT)
    # only whitelisted headers install outside of the DriverKit Runtime hierarchy
    DRIVERKITSDKHEADERSROOT=$(DRIVERKITROOT)
    DRIVERKITFRAMEDIR = $(DRIVERKITROOT)/System/Library/Frameworks
endif

FRAMEDIR = $(SDKHEADERSROOT)/System/Library/Frameworks

SINCVERS = B
SINCFRAME = $(FRAMEDIR)/System.framework
SINCDIR = $(SINCFRAME)/Versions/$(SINCVERS)/Headers
SPINCDIR = $(SINCFRAME)/Versions/$(SINCVERS)/PrivateHeaders
SRESDIR = $(SINCFRAME)/Versions/$(SINCVERS)/Resources

ifndef INCDIR
    INCDIR = $(SDKHEADERSROOT)/usr/include
endif
ifndef DRIVERKITINCDIR
    DRIVERKITINCDIR = $(DRIVERKITSDKHEADERSROOT)/usr/include
endif
ifndef LCLDIR
	LCLDIR = $(SDKHEADERSROOT)/usr/local/include
endif
ifndef DRIVERKITLCLDIR
    DRIVERKITLCLDIR = $(DRIVERKITSDKHEADERSROOT)/usr/local/include
endif

KINCVERS = A
KINCFRAME = $(FRAMEDIR)/Kernel.framework
KINCDIR = $(KINCFRAME)/Versions/$(KINCVERS)/Headers
KPINCDIR = $(KINCFRAME)/Versions/$(KINCVERS)/PrivateHeaders
KRESDIR = $(KINCFRAME)/Versions/$(KINCVERS)/Resources

DKIT_INCFRAME = DriverKit.framework

ifeq ($(PLATFORM),MacOSX)
DKIT_INCVERS = A
DKIT_INCDIR = $(DKIT_INCFRAME)/Versions/$(DKIT_INCVERS)/Headers
DKIT_PINCDIR = $(DKIT_INCFRAME)/Versions/$(DKIT_INCVERS)/PrivateHeaders
else
# non-macOS SDK frameworks use shallow bundle structure
DKIT_INCDIR = $(DKIT_INCFRAME)/Headers
DKIT_PINCDIR = $(DKIT_INCFRAME)/PrivateHeaders
endif

# DriverKit SDK frameworks use shallow bundle structure
DRIVERKIT_DKIT_INCDIR = $(DKIT_INCFRAME)/Headers
DRIVERKIT_DKIT_PINCDIR = $(DKIT_INCFRAME)/PrivateHeaders

XNU_PRIVATE_UNIFDEF :=
XNU_PRIVATE_UNIFDEF += -UMACH_KERNEL_PRIVATE
XNU_PRIVATE_UNIFDEF += -UBSD_KERNEL_PRIVATE
XNU_PRIVATE_UNIFDEF += -UIOKIT_KERNEL_PRIVATE
XNU_PRIVATE_UNIFDEF += -ULIBKERN_KERNEL_PRIVATE
XNU_PRIVATE_UNIFDEF += -ULIBSA_KERNEL_PRIVATE
XNU_PRIVATE_UNIFDEF += -UPEXPERT_KERNEL_PRIVATE
XNU_PRIVATE_UNIFDEF += -UXNU_KERNEL_PRIVATE
XNU_PRIVATE_UNIFDEF += -UXNU_BOUND_CHECKS


PLATFORM_UNIFDEF = $(foreach x,$(SUPPORTED_PLATFORMS),$(if $(filter $(PLATFORM),$(x)),-DPLATFORM_$(x) $(foreach token,$(PLATFORM_UNIFDEF_BLACKLIST_TOKENS_$(x)),-U$(token)),-UPLATFORM_$(x)))


# Some header guards need to be present and checked in kernel headers but removed from userspace headers
KERNEL_ONLY_GUARDS_UNIFDEF =

SPINCFRAME_UNIFDEF  = $(PLATFORM_UNIFDEF) $(XNU_PRIVATE_UNIFDEF) $(SEED_DEFINES) -UKERNEL_PRIVATE -UKERNEL -DPRIVATE -UDRIVERKIT -U_OPEN_SOURCE_ -U__OPEN_SOURCE__ $(KERNEL_ONLY_GUARDS_UNIFDEF)
SINCFRAME_UNIFDEF   = $(PLATFORM_UNIFDEF) $(XNU_PRIVATE_UNIFDEF) $(SEED_DEFINES) -UKERNEL_PRIVATE -UKERNEL -UPRIVATE -UDRIVERKIT -D_OPEN_SOURCE_ -D__OPEN_SOURCE__ $(KERNEL_ONLY_GUARDS_UNIFDEF)
DKPINCFRAME_UNIFDEF = $(PLATFORM_UNIFDEF) $(XNU_PRIVATE_UNIFDEF) $(SEED_DEFINES) -UKERNEL_PRIVATE -UKERNEL -DPRIVATE -DDRIVERKIT -U_OPEN_SOURCE_ -U__OPEN_SOURCE__ $(KERNEL_ONLY_GUARDS_UNIFDEF)
DKINCFRAME_UNIFDEF  = $(PLATFORM_UNIFDEF) $(XNU_PRIVATE_UNIFDEF) $(SEED_DEFINES) -UKERNEL_PRIVATE -UKERNEL -UPRIVATE -DDRIVERKIT -D_OPEN_SOURCE_ -D__OPEN_SOURCE__ $(KERNEL_ONLY_GUARDS_UNIFDEF)
KPINCFRAME_UNIFDEF  = $(PLATFORM_UNIFDEF) $(XNU_PRIVATE_UNIFDEF) $(SEED_DEFINES) -DKERNEL_PRIVATE -DKERNEL -DPRIVATE -UDRIVERKIT -U_OPEN_SOURCE_ -U__OPEN_SOURCE__
KINCFRAME_UNIFDEF   = $(PLATFORM_UNIFDEF) $(XNU_PRIVATE_UNIFDEF) $(SEED_DEFINES) -UKERNEL_PRIVATE -DKERNEL -UPRIVATE -UDRIVERKIT -D_OPEN_SOURCE_ -D__OPEN_SOURCE__
PDATA_UNIFDEF       = $(PLATFORM_UNIFDEF) $(XNU_PRIVATE_UNIFDEF) $(SEED_DEFINES) -DPRIVATE -U_OPEN_SOURCE_ -U__OPEN_SOURCE__
DATA_UNIFDEF        = $(PLATFORM_UNIFDEF) $(XNU_PRIVATE_UNIFDEF) $(SEED_DEFINES) -UPRIVATE -D_OPEN_SOURCE_ -D__OPEN_SOURCE__

#
# Compononent Header file destinations
#
EXPDIR = EXPORT_HDRS/$(COMPONENT)

#
# Strip Flags
#
STRIP_FLAGS_RELEASE	= -S -x
STRIP_FLAGS_DEVELOPMENT	= -S
STRIP_FLAGS_KASAN = $(STRIP_FLAGS_DEVELOPMENT)
STRIP_FLAGS_DEBUG	= -S
STRIP_FLAGS_PROFILE	= -S -x

STRIP_FLAGS	= $($(addsuffix $(CURRENT_KERNEL_CONFIG),STRIP_FLAGS_))

#
# dsymutil flags
#
DSYMUTIL_FLAGS_GEN	= --minimize

DSYMUTIL_FLAGS_X86_64	= --arch=x86_64
DSYMUTIL_FLAGS_X86_64H	= --arch=x86_64h
DSYMUTIL_FLAGS_ARM	= --arch=arm
DSYMUTIL_FLAGS_ARM64	=

DSYMUTIL_FLAGS = $(DSYMUTIL_FLAGS_GEN) \
	$($(addsuffix $(CURRENT_ARCH_CONFIG),DSYMUTIL_FLAGS_))

#
# Man Page destination
#
MANDIR = /usr/share/man

#
# DEBUG alias location
#
DEVELOPER_EXTRAS_DIR = /AppleInternal/CoreOS/xnu_$(CURRENT_KERNEL_CONFIG_LC)

#
# mach_kernel install location
#
INSTALL_KERNEL_DIR = /

#
# new OS X install location
#
SYSTEM_LIBRARY_KERNELS_DIR = /System/Library/Kernels

#
# File names in DSTROOT
#

ifeq ($(PLATFORM),MacOSX)
KERNEL_FILE_NAME_PREFIX = kernel
else
KERNEL_FILE_NAME_PREFIX = mach
endif

ifeq ($(CURRENT_MACHINE_CONFIG),NONE)
ifeq ($(CURRENT_KERNEL_CONFIG),RELEASE)
KERNEL_FILE_NAME = $(KERNEL_FILE_NAME_PREFIX)
KERNEL_LLDBBOOTSTRAP_NAME = $(KERNEL_FILE_NAME_PREFIX).py
else
KERNEL_FILE_NAME = $(KERNEL_FILE_NAME_PREFIX).$(CURRENT_KERNEL_CONFIG_LC)
KERNEL_LLDBBOOTSTRAP_NAME = $(KERNEL_FILE_NAME_PREFIX).py
endif
else
KERNEL_FILE_NAME = $(KERNEL_FILE_NAME_PREFIX).$(CURRENT_KERNEL_CONFIG_LC).$(CURRENT_MACHINE_CONFIG_LC)
KERNEL_LLDBBOOTSTRAP_NAME = $(KERNEL_FILE_NAME_PREFIX)_$(CURRENT_KERNEL_CONFIG_LC).py
endif

CURRENT_ALIAS_MACHINE_CONFIG = $(word 4,$(subst ^, ,$(CURRENT_BUILD_CONFIG)))
CURRENT_ALIAS_MACHINE_CONFIG_LC = $(shell printf "%s" "$(CURRENT_ALIAS_MACHINE_CONFIG)" | $(TR) A-Z a-z)
ifneq ($(CURRENT_ALIAS_MACHINE_CONFIG),)
ALIAS_FILE_NAME = $(KERNEL_FILE_NAME_PREFIX).$(CURRENT_KERNEL_CONFIG_LC).$(CURRENT_ALIAS_MACHINE_CONFIG_LC)
endif

#
# System.kext pseudo-kext install location
#
INSTALL_EXTENSIONS_DIR = /System/Library/Extensions

#
# System.kext PlugIns install location
#
DSTROOT_SYSTEM_KEXT_PATH = $(addprefix $(DSTROOT)$(INSTALL_EXTENSIONS_DIR),/System.kext/PlugIns)
SYMROOT_SYSTEM_KEXT_PATH = $(addprefix $(SYMROOT),/System.kext/PlugIns)

#
# KDK location
#
INSTALL_KERNEL_SYM_DIR = /System/Library/Extensions/KDK

#
# Misc. Etc.
#
INSTALL_SHARE_MISC_DIR = /usr/share/misc
INSTALL_DTRACE_SCRIPTS_DIR = /usr/lib/dtrace
INSTALL_DTRACE_LIBEXEC_DIR = /usr/libexec/dtrace

#
# Overrides for XBS build aliases
#
ifneq ($(filter $(RC_ProjectName),xnu_headers_driverkit),)
USE_BINARY_PLIST = 1
else ifneq ($(filter $(RC_ProjectName),xnu_debug),)
INSTALL_KERNEL_DIR := $(DEVELOPER_EXTRAS_DIR)
INSTALL_KERNEL_SYM_DIR := $(DEVELOPER_EXTRAS_DIR)
INSTALL_KERNEL_SYM_TO_KDK = 1
INSTALL_XNU_DEBUG_FILES = 1
else ifneq ($(filter $(SUPPORTED_EMBEDDED_PLATFORMS),$(PLATFORM)),)
INSTALL_KERNEL_SYM_TO_KDK = 1
USE_BINARY_PLIST = 1
else ifneq ($(filter $(SUPPORTED_SIMULATOR_PLATFORMS),$(PLATFORM)),)
USE_BINARY_PLIST = 1
else ifeq ($(PLATFORM),MacOSX)
INSTALL_KERNEL_DIR := $(SYSTEM_LIBRARY_KERNELS_DIR)
INSTALL_KERNEL_SYM_DIR := $(SYSTEM_LIBRARY_KERNELS_DIR)
INSTALL_KERNEL_SYM_TO_KDK = $(if $(filter YES,$(DWARF_DSYM_FILE_SHOULD_ACCOMPANY_PRODUCT)),1,0)
endif

ifneq ($(filter $(RC_ProjectName),xnu_kasan),)
INSTALL_KASAN_ONLY = 1
endif

# vim: set ft=make: