linux-imx/arch/um/Makefile

This file is included by the global makefile so that you can add your own

architecture-specific flags and dependencies.

Copyright (C) 2002 Jeff Dike (jdike@karaya.com)

Licensed under the GPL

ARCH_DIR := arch/um OS := $(shell uname -s)

We require bash because the vmlinux link and loader script cpp use bash

features.

SHELL := /bin/bash

filechk_gen_header = $<

core-y += $(ARCH_DIR)/kernel/
$(ARCH_DIR)/drivers/
$(ARCH_DIR)/os-$(OS)/

Have to precede the include because the included Makefiles reference them.

SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h
module.h vm-flags.h elf.h host_ldt.h SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header))

XXX: The "os" symlink is only used by arch/um/include/os.h, which includes

../os/include/file.h

These are cleaned up during mrproper. Please DO NOT fix it again, this is

the Correct Thing(tm) to do!

ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os
$(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h

um-modes-$(CONFIG_MODE_TT) += tt um-modes-$(CONFIG_MODE_SKAS) += skas

MODE_INCLUDE += $(foreach mode,$(um-modes-y),
-I$(srctree)/$(ARCH_DIR)/include/$(mode))

MAKEFILES-INCL += $(foreach mode,$(um-modes-y),
$(srctree)/$(ARCH_DIR)/Makefile-$(mode))

ifneq ($(MAKEFILES-INCL),) include $(MAKEFILES-INCL) endif

ARCH_INCLUDE := -I$(ARCH_DIR)/include ifneq ($(KBUILD_SRC),) ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include endif SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH)

-Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so

named - it's a common symbol in libpcap, so we get a binary which crashes.

Same things for in6addr_loopback and mktime - found in libc. For these two we

only get link-time error, luckily.

These apply to USER_CFLAGS to.

CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH="$(SUBARCH)"
$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap
-Din6addr_loopback=kernel_in6addr_loopback

AFLAGS += $(ARCH_INCLUDE)

USER_CFLAGS := $(patsubst -I%,,$(CFLAGS)) USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE)
$(MODE_INCLUDE) -D_FILE_OFFSET_BITS=64

-Derrno=kernel_errno - This turns all kernel references to errno into

kernel_errno to separate them from the libc errno. This allows -fno-common

in CFLAGS. Otherwise, it would cause ld to complain about the two different

errnos.

These apply to kernelspace only.

CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask
-Dmktime=kernel_mktime CFLAGS += $(call cc-option,-fno-unit-at-a-time,)

include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)

#This will adjust *FLAGS accordingly to the platform. include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)

These are needed for clean and mrproper, since in that case .config is not

included; the values here are meaningless

CONFIG_NEST_LEVEL ?= 0 CONFIG_KERNEL_HALF_GIGS ?= 0

SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)

PHONY += linux

all: linux

linux: vmlinux @echo ' LINK $@' $(Q)ln -f $< $@

define archhelp echo '* linux - Binary kernel image (./linux) - for backward' echo ' compatibility only, this creates a hard link to the' echo ' real kernel binary, the the "vmlinux" binary you' echo ' find in the kernel root.' endef

ifneq ($(KBUILD_SRC),) $(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch) else $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch) endif

archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h prepare: $(ARCH_DIR)/include/kern_constants.h

LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib

CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,)
$(call cc-option, -fno-stack-protector,)
$(call cc-option, -fno-stack-protector-all,)

CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT CONFIG_KERNEL_STACK_ORDER ?= 2 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )

ifndef START START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] ) endif

CPPFLAGS_vmlinux.lds = -U$(SUBARCH)
-DSTART=$(START) -DELF_ARCH=$(ELF_ARCH)
-DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y)
-DKERNEL_STACK_SIZE=$(STACK_SIZE)
-DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap.o

#The wrappers will select whether using "malloc" or the kernel allocator. LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc

CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) define cmd_vmlinux__ $(CC) $(CFLAGS_vmlinux) -o $@
-Wl,-T,$(vmlinux-lds) $(vmlinux-init)
-Wl,--start-group $(vmlinux-main) -Wl,--end-group
-lutil
$(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main)
FORCE ,$^) ; rm -f linux endef

#When cleaning we don't include .config, so we don't include #TT or skas makefiles and don't clean skas_ptregs.h. CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h
$(ARCH_DIR)/include/user_constants.h
$(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch

MRPROPER_FILES += $(ARCH_SYMLINKS)

archclean: @find . ( -name '.bb' -o -name '.bbg' -o -name '.da'
-o -name '.gcov' ) -type f -print | xargs rm -f

$(SYMLINK_HEADERS): @echo ' SYMLINK $@' ifneq ($(KBUILD_SRC),) $(Q)mkdir -p $(objtree)/include/asm-um $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ else $(Q)cd $(TOPDIR)/$(dir $@) ;
ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) endif

include/asm-um/arch: @echo ' SYMLINK $@' ifneq ($(KBUILD_SRC),) $(Q)mkdir -p $(objtree)/include/asm-um $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch else $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch endif

$(objtree)/$(ARCH_DIR)/include: @echo ' MKDIR $@' $(Q)mkdir -p $@

$(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include @echo ' SYMLINK $@' ifneq ($(KBUILD_SRC),) $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep else $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep endif

$(ARCH_DIR)/os: @echo ' SYMLINK $@' ifneq ($(KBUILD_SRC),) $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os else $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os endif

Generated files

define filechk_umlconfig sed 's/ CONFIG/ UML_CONFIG/' endef

$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h $(call filechk,umlconfig)

$(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@

define filechk_gen-asm-offsets (set -e;
echo "/*";
echo " * DO NOT MODIFY.";
echo " *";
echo " * This file was generated by arch/$(ARCH)/Makefile";
echo " ";
echo " /";
echo "";
sed -ne "/^->/{s:^->[^ ]* [$$#][^ ]* .*:#define \1 \2 / \3 */:; s:->::; p;}";
echo ""; ) endef

$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s $(call filechk,gen-asm-offsets)

$(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include @echo ' SYMLINK $@' $(Q)ln -sf ../../../include/asm-um/asm-offsets.h $@

export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS