ec758f9832
When building a 64bit kernel which includes all necessary drivers and filesystems the vmlinux kernel often gets so huge, that the linker won't be able to resolve the branch stubs. This patch overcomes this limit by providing an option to compile the kernel with the -mlong-calls compiler option. Signed-off-by: Helge Deller <deller@gmx.de>
142 lines
4.1 KiB
Makefile
142 lines
4.1 KiB
Makefile
#
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# parisc/Makefile
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#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies. Remember to do have actions
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# for "archclean" and "archdep" for cleaning up and making dependencies for
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# this architecture
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1994 by Linus Torvalds
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# Portions Copyright (C) 1999 The Puffin Group
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#
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# Modified for PA-RISC Linux by Paul Lahaie, Alex deVries,
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# Mike Shaver, Helge Deller and Martin K. Petersen
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#
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KBUILD_DEFCONFIG := default_defconfig
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NM = sh $(srctree)/arch/parisc/nm
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CHECKFLAGS += -D__hppa__=1
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LIBGCC = $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
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MACHINE := $(shell uname -m)
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ifeq ($(MACHINE),parisc*)
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NATIVE := 1
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endif
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ifdef CONFIG_64BIT
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UTS_MACHINE := parisc64
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CHECKFLAGS += -D__LP64__=1 -m64
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WIDTH := 64
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else # 32-bit
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WIDTH :=
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endif
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# attempt to help out folks who are cross-compiling
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ifeq ($(NATIVE),1)
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CROSS_COMPILE := hppa$(WIDTH)-linux-
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else
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ifeq ($(CROSS_COMPILE),)
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CROSS_COMPILE := hppa$(WIDTH)-linux-gnu-
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endif
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endif
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OBJCOPY_FLAGS =-O binary -R .note -R .comment -S
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cflags-y := -pipe
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# These flags should be implied by an hppa-linux configuration, but they
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# are not in gcc 3.2.
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cflags-y += -mno-space-regs -mfast-indirect-calls
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# Currently we save and restore fpregs on all kernel entry/interruption paths.
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# If that gets optimized, we might need to disable the use of fpregs in the
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# kernel.
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cflags-y += -mdisable-fpregs
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# Without this, "ld -r" results in .text sections that are too big
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# (> 0x40000) for branches to reach stubs.
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ifndef CONFIG_FUNCTION_TRACER
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cflags-y += -ffunction-sections
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endif
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# Use long jumps instead of long branches (needed if your linker fails to
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# link a too big vmlinux executable)
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cflags-$(CONFIG_MLONGCALLS) += -mlong-calls
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# select which processor to optimise for
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cflags-$(CONFIG_PA7100) += -march=1.1 -mschedule=7100
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cflags-$(CONFIG_PA7200) += -march=1.1 -mschedule=7200
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cflags-$(CONFIG_PA7100LC) += -march=1.1 -mschedule=7100LC
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cflags-$(CONFIG_PA7300LC) += -march=1.1 -mschedule=7300
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cflags-$(CONFIG_PA8X00) += -march=2.0 -mschedule=8000
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head-y := arch/parisc/kernel/head.o
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KBUILD_CFLAGS += $(cflags-y)
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kernel-y := mm/ kernel/ math-emu/
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kernel-$(CONFIG_HPUX) += hpux/
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core-y += $(addprefix arch/parisc/, $(kernel-y))
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libs-y += arch/parisc/lib/ $(LIBGCC)
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drivers-$(CONFIG_OPROFILE) += arch/parisc/oprofile/
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PALO := $(shell if (which palo 2>&1); then : ; \
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elif [ -x /sbin/palo ]; then echo /sbin/palo; \
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fi)
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PALOCONF := $(shell if [ -f $(src)/palo.conf ]; then echo $(src)/palo.conf; \
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else echo $(obj)/palo.conf; \
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fi)
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palo: vmlinux
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@if test ! -x "$(PALO)"; then \
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echo 'ERROR: Please install palo first (apt-get install palo)';\
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echo 'or build it from source and install it somewhere in your $$PATH';\
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false; \
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fi
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@if test ! -f "$(PALOCONF)"; then \
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cp $(src)/arch/parisc/defpalo.conf $(obj)/palo.conf; \
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echo 'A generic palo config file ($(obj)/palo.conf) has been created for you.'; \
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echo 'You should check it and re-run "make palo".'; \
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echo 'WARNING: the "lifimage" file is now placed in this directory by default!'; \
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false; \
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fi
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$(PALO) -f $(PALOCONF)
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# Shorthands for known targets not supported by parisc, use vmlinux as default
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Image zImage bzImage: vmlinux
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kernel_install: vmlinux
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sh $(src)/arch/parisc/install.sh \
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$(KERNELRELEASE) $< System.map "$(INSTALL_PATH)"
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install: kernel_install modules_install
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CLEAN_FILES += lifimage
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MRPROPER_FILES += palo.conf
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define archhelp
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@echo '* vmlinux - Uncompressed kernel image (./vmlinux)'
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@echo ' palo - Bootable image (./lifimage)'
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@echo ' install - Install kernel using'
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@echo ' (your) ~/bin/$(INSTALLKERNEL) or'
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@echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
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@echo ' copy to $$(INSTALL_PATH)'
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endef
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# we require gcc 3.3 or above to compile the kernel
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archprepare: checkbin
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checkbin:
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@if test "$(call cc-version)" -lt "0303"; then \
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echo -n "Sorry, GCC v3.3 or above is required to build " ; \
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echo "the kernel." ; \
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false ; \
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fi
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