mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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ff487d4103
LLD failed to link vmlinux with 64bit load address for 32bit ELF while bfd will strip 64bit address into 32bit silently. To fix LLD build, we should truncate load address provided by platform into 32bit for 32bit kernel. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Link: https://github.com/ClangBuiltLinux/linux/issues/786 Link: https://sourceware.org/bugzilla/show_bug.cgi?id=25784 Reviewed-by: Fangrui Song <maskray@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
577 lines
20 KiB
Makefile
577 lines
20 KiB
Makefile
#
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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, 95, 96, 2003 by Ralf Baechle
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# DECStation modifications by Paul M. Antoine, 1996
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# Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki
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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" cleaning up for this architecture.
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#
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archscripts: scripts_basic
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$(Q)$(MAKE) $(build)=arch/mips/tools elf-entry
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ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
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$(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
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endif
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$(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
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KBUILD_DEFCONFIG := 32r2el_defconfig
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KBUILD_DTBS := dtbs
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#
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# Select the object file format to substitute into the linker script.
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#
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ifdef CONFIG_CPU_LITTLE_ENDIAN
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32bit-tool-archpref = mipsel
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64bit-tool-archpref = mips64el
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32bit-bfd = elf32-tradlittlemips
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64bit-bfd = elf64-tradlittlemips
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32bit-emul = elf32ltsmip
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64bit-emul = elf64ltsmip
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else
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32bit-tool-archpref = mips
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64bit-tool-archpref = mips64
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32bit-bfd = elf32-tradbigmips
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64bit-bfd = elf64-tradbigmips
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32bit-emul = elf32btsmip
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64bit-emul = elf64btsmip
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endif
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ifdef CONFIG_32BIT
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tool-archpref = $(32bit-tool-archpref)
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UTS_MACHINE := mips
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endif
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ifdef CONFIG_64BIT
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tool-archpref = $(64bit-tool-archpref)
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UTS_MACHINE := mips64
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endif
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ifneq ($(SUBARCH),$(ARCH))
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ifeq ($(CROSS_COMPILE),)
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CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
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endif
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endif
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ifdef CONFIG_FUNCTION_GRAPH_TRACER
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ifndef KBUILD_MCOUNT_RA_ADDRESS
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ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
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cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
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endif
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endif
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endif
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cflags-y += $(call cc-option, -mno-check-zero-division)
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ifdef CONFIG_32BIT
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ld-emul = $(32bit-emul)
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vmlinux-32 = vmlinux
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vmlinux-64 = vmlinux.64
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cflags-y += -mabi=32
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endif
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ifdef CONFIG_64BIT
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ld-emul = $(64bit-emul)
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vmlinux-32 = vmlinux.32
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vmlinux-64 = vmlinux
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cflags-y += -mabi=64
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endif
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all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
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all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
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all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
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#
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# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
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# code since it only slows down the whole thing. At some point we might make
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# use of global pointer optimizations but their use of $28 conflicts with
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# the current pointer optimization.
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#
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# The DECStation requires an ECOFF kernel for remote booting, other MIPS
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# machines may also. Since BFD is incredibly buggy with respect to
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# crossformat linking we rely on the elf2ecoff tool for format conversion.
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#
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cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
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cflags-y += -msoft-float
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LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
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KBUILD_AFLAGS_MODULE += -mlong-calls
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KBUILD_CFLAGS_MODULE += -mlong-calls
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ifeq ($(CONFIG_RELOCATABLE),y)
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LDFLAGS_vmlinux += --emit-relocs
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endif
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#
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# pass -msoft-float to GAS if it supports it. However on newer binutils
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# (specifically newer than 2.24.51.20140728) we then also need to explicitly
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# set ".set hardfloat" in all files which manipulate floating point registers.
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#
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ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
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cflags-y += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
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endif
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cflags-y += -ffreestanding
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#
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# We explicitly add the endianness specifier if needed, this allows
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# to compile kernels with a toolchain for the other endianness. We
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# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
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# when fed the toolchain default!
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#
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# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
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# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
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# are used, so we kludge that here. A bug has been filed at
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# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
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#
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# clang doesn't suffer from these issues and our checks against -dumpmachine
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# don't work so well when cross compiling, since without providing --target
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# clang's output will be based upon the build machine. So for clang we simply
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# unconditionally specify -EB or -EL as appropriate.
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#
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ifdef CONFIG_CC_IS_CLANG
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cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
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cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL
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else
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undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
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undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
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predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
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predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
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cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
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cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
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endif
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cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
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-fno-omit-frame-pointer
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# Some distribution-specific toolchains might pass the -fstack-check
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# option during the build, which adds a simple stack-probe at the beginning
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# of every function. This stack probe is to ensure that there is enough
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# stack space, else a SEGV is generated. This is not desirable for MIPS
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# as kernel stacks are small, placed in unmapped virtual memory, and do not
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# grow when overflowed. Especially on SGI IP27 platforms, this check will
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# lead to a NULL pointer dereference in _raw_spin_lock_irq.
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#
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# In disassembly, this stack probe appears at the top of a function as:
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# sd zero,<offset>(sp)
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# Where <offset> is a negative value.
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#
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cflags-y += -fno-stack-check
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#
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# CPU-dependent compiler/assembler options for optimization.
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#
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cflags-$(CONFIG_CPU_R3000) += -march=r3000
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cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
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cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
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cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
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cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
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cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap
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cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap
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cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
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cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
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cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
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cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
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cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
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cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
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-Wa,--trap
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cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
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-Wa,--trap
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cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
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-Wa,--trap
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cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
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-Wa,--trap
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cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
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cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
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cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
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-Wa,--trap
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cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
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ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
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cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
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endif
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cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
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cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
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cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
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cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
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cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
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# For smartmips configurations, there are hundreds of warnings due to ISA overrides
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# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
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# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
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# similar directives in the kernel will spam the build logs with the following warnings:
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# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
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# or
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# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
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# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
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# been fixed properly.
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mips-cflags := $(cflags-y)
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ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
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smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
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cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
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endif
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ifeq ($(CONFIG_CPU_MICROMIPS),y)
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micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
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cflags-$(micromips-ase) += -mmicromips
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endif
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ifeq ($(CONFIG_CPU_HAS_MSA),y)
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toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
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cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
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endif
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toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
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cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
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# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
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# only warns
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xpa-cflags-y := $(mips-cflags)
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xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings
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toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
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cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA
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toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
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cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC
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toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
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cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP
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toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
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cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV
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#
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# Firmware support
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#
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libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
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libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
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libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
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libs-y += arch/mips/fw/lib/
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#
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# Kernel compression
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#
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ifdef CONFIG_SYS_SUPPORTS_ZBOOT
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COMPRESSION_FNAME = vmlinuz
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else
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COMPRESSION_FNAME = vmlinux
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endif
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#
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# Board-dependent options and extra files
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#
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include arch/mips/Kbuild.platforms
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ifdef CONFIG_PHYSICAL_START
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load-y = $(CONFIG_PHYSICAL_START)
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endif
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entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
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cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
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drivers-$(CONFIG_PCI) += arch/mips/pci/
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#
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# Automatically detect the build format. By default we choose
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# the elf format according to the load address.
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# We can always force a build with a 64-bits symbol format by
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# passing 'KBUILD_SYM32=no' option to the make's command line.
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#
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ifdef CONFIG_64BIT
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ifndef KBUILD_SYM32
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ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
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KBUILD_SYM32 = y
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endif
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endif
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ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
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cflags-y += -msym32 -DKBUILD_64BIT_SYM32
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else
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ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
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$(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
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endif
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endif
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endif
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# When linking a 32-bit executable the LLVM linker cannot cope with a
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# 32-bit load address that has been sign-extended to 64 bits. Simply
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# remove the upper 32 bits then, as it is safe to do so with other
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# linkers.
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ifdef CONFIG_64BIT
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load-ld = $(load-y)
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else
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load-ld = $(subst 0xffffffff,0x,$(load-y))
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endif
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KBUILD_AFLAGS += $(cflags-y)
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KBUILD_CFLAGS += $(cflags-y)
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KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
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KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
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bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
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LINKER_LOAD_ADDRESS=$(load-ld) \
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VMLINUX_ENTRY_ADDRESS=$(entry-y) \
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PLATFORM="$(platform-y)" \
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ITS_INPUTS="$(its-y)"
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ifdef CONFIG_32BIT
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bootvars-y += ADDR_BITS=32
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endif
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ifdef CONFIG_64BIT
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bootvars-y += ADDR_BITS=64
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endif
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# This is required to get dwarf unwinding tables into .debug_frame
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# instead of .eh_frame so we don't discard them.
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
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KBUILD_LDFLAGS += -m $(ld-emul)
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ifdef CONFIG_MIPS
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CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
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egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
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sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
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endif
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OBJCOPYFLAGS += --remove-section=.reginfo
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head-y := arch/mips/kernel/head.o
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libs-y += arch/mips/lib/
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libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
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# See arch/mips/Kbuild for content of core part of the kernel
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core-y += arch/mips/
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drivers-y += arch/mips/crypto/
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drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
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# suspend and hibernation support
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drivers-$(CONFIG_PM) += arch/mips/power/
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# boot image targets (arch/mips/boot/)
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boot-y := vmlinux.bin
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boot-y += vmlinux.ecoff
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boot-y += vmlinux.srec
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ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
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boot-y += uImage
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boot-y += uImage.bin
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boot-y += uImage.bz2
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boot-y += uImage.gz
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boot-y += uImage.lzma
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boot-y += uImage.lzo
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endif
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boot-y += vmlinux.itb
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boot-y += vmlinux.gz.itb
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boot-y += vmlinux.bz2.itb
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boot-y += vmlinux.lzma.itb
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boot-y += vmlinux.lzo.itb
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# compressed boot image targets (arch/mips/boot/compressed/)
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bootz-y := vmlinuz
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bootz-y += vmlinuz.bin
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bootz-y += vmlinuz.ecoff
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bootz-y += vmlinuz.srec
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ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
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bootz-y += uzImage.bin
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endif
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ifdef CONFIG_LASAT
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rom.bin rom.sw: vmlinux
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$(Q)$(MAKE) $(build)=arch/mips/lasat/image \
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$(bootvars-y) $@
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endif
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#
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# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
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# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
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# convert to ECOFF using elf2ecoff.
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#
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quiet_cmd_32 = OBJCOPY $@
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cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
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vmlinux.32: vmlinux
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$(call cmd,32)
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#
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# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
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# ELF files from 32-bit files by conversion.
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#
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quiet_cmd_64 = OBJCOPY $@
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cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
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vmlinux.64: vmlinux
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$(call cmd,64)
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all: $(all-y) $(KBUILD_DTBS)
|
|
|
|
# boot
|
|
$(boot-y): $(vmlinux-32) FORCE
|
|
$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
|
|
$(bootvars-y) arch/mips/boot/$@
|
|
|
|
ifdef CONFIG_SYS_SUPPORTS_ZBOOT
|
|
# boot/compressed
|
|
$(bootz-y): $(vmlinux-32) FORCE
|
|
$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
|
|
$(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
|
|
else
|
|
vmlinuz: FORCE
|
|
@echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
|
|
/bin/false
|
|
endif
|
|
|
|
|
|
CLEAN_FILES += vmlinux.32 vmlinux.64
|
|
|
|
# device-trees
|
|
core-y += arch/mips/boot/dts/
|
|
|
|
archprepare:
|
|
ifdef CONFIG_MIPS32_N32
|
|
@$(kecho) ' Checking missing-syscalls for N32'
|
|
$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
|
|
endif
|
|
ifdef CONFIG_MIPS32_O32
|
|
@$(kecho) ' Checking missing-syscalls for O32'
|
|
$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
|
|
endif
|
|
|
|
install:
|
|
$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
|
|
ifdef CONFIG_SYS_SUPPORTS_ZBOOT
|
|
$(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
|
|
endif
|
|
$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
|
|
$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
|
|
|
|
archclean:
|
|
$(Q)$(MAKE) $(clean)=arch/mips/boot
|
|
$(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
|
|
$(Q)$(MAKE) $(clean)=arch/mips/boot/tools
|
|
$(Q)$(MAKE) $(clean)=arch/mips/lasat
|
|
|
|
archheaders:
|
|
$(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
|
|
|
|
define archhelp
|
|
echo ' install - install kernel into $(INSTALL_PATH)'
|
|
echo ' vmlinux.ecoff - ECOFF boot image'
|
|
echo ' vmlinux.bin - Raw binary boot image'
|
|
echo ' vmlinux.srec - SREC boot image'
|
|
echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
|
|
echo ' vmlinuz - Compressed boot(zboot) image'
|
|
echo ' vmlinuz.ecoff - ECOFF zboot image'
|
|
echo ' vmlinuz.bin - Raw binary zboot image'
|
|
echo ' vmlinuz.srec - SREC zboot image'
|
|
echo ' uImage - U-Boot image'
|
|
echo ' uImage.bin - U-Boot image (uncompressed)'
|
|
echo ' uImage.bz2 - U-Boot image (bz2)'
|
|
echo ' uImage.gz - U-Boot image (gzip)'
|
|
echo ' uImage.lzma - U-Boot image (lzma)'
|
|
echo ' uImage.lzo - U-Boot image (lzo)'
|
|
echo ' uzImage.bin - U-Boot image (self-extracting)'
|
|
echo
|
|
echo ' These will be default as appropriate for a configured platform.'
|
|
echo
|
|
echo ' If you are targeting a system supported by generic kernels you may'
|
|
echo ' configure the kernel for a given architecture target like so:'
|
|
echo
|
|
echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
|
|
echo
|
|
echo ' Where BOARDS is some subset of the following:'
|
|
for board in $(sort $(BOARDS)); do echo " $${board}"; done
|
|
echo
|
|
echo ' Specifically the following generic default configurations are'
|
|
echo ' supported:'
|
|
echo
|
|
$(foreach cfg,$(generic_defconfigs),
|
|
printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
|
|
echo
|
|
echo ' The following legacy default configurations have been converted to'
|
|
echo ' generic and can still be used:'
|
|
echo
|
|
$(foreach cfg,$(sort $(legacy_defconfigs)),
|
|
printf " %-24s - Build $($(cfg)-y)\n" $(cfg);)
|
|
echo
|
|
echo ' Otherwise, the following default configurations are available:'
|
|
endef
|
|
|
|
generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
|
|
generic_defconfigs :=
|
|
|
|
#
|
|
# If the user generates a generic kernel configuration without specifying a
|
|
# list of boards to include the config fragments for, default to including all
|
|
# available board config fragments.
|
|
#
|
|
ifeq ($(BOARDS),)
|
|
BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
|
|
endif
|
|
|
|
#
|
|
# Generic kernel configurations which merge generic_defconfig with the
|
|
# appropriate config fragments from arch/mips/configs/generic/, resulting in
|
|
# the ability to easily configure the kernel for a given architecture,
|
|
# endianness & set of boards without duplicating the needed configuration in
|
|
# hundreds of defconfig files.
|
|
#
|
|
define gen_generic_defconfigs
|
|
$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
|
|
target := $(bits)$(rev)$(filter el,$(endian))_defconfig
|
|
generic_defconfigs += $$(target)
|
|
$$(target): $(generic_config_dir)/$(bits)$(rev).config
|
|
$$(target): $(generic_config_dir)/$(endian).config
|
|
)))
|
|
endef
|
|
|
|
$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
|
|
$(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
|
|
|
|
define describe_generic_defconfig
|
|
$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
|
|
endef
|
|
|
|
.PHONY: $(generic_defconfigs)
|
|
$(generic_defconfigs):
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
|
|
-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
|
|
grep -Ev '^#'
|
|
$(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
|
|
KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
|
|
$(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
|
|
"$(origin BOARDS)" $(BOARDS)
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
|
|
|
|
#
|
|
# Prevent generic merge_config rules attempting to merge single fragments
|
|
#
|
|
$(generic_config_dir)/%.config: ;
|
|
|
|
#
|
|
# Prevent direct use of generic_defconfig, which is intended to be used as the
|
|
# basis of the various ISA-specific targets generated above.
|
|
#
|
|
.PHONY: generic_defconfig
|
|
generic_defconfig:
|
|
$(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
|
|
$(Q)echo "used via an ISA-specific target from the following list:"
|
|
$(Q)echo
|
|
$(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done
|
|
$(Q)echo
|
|
$(Q)false
|
|
|
|
#
|
|
# Legacy defconfig compatibility - these targets used to be real defconfigs but
|
|
# now that the boards have been converted to use the generic kernel they are
|
|
# wrappers around the generic rules above.
|
|
#
|
|
legacy_defconfigs += ocelot_defconfig
|
|
ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot
|
|
|
|
legacy_defconfigs += sead3_defconfig
|
|
sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3
|
|
|
|
legacy_defconfigs += sead3micro_defconfig
|
|
sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3
|
|
|
|
legacy_defconfigs += xilfpga_defconfig
|
|
xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga
|
|
|
|
.PHONY: $(legacy_defconfigs)
|
|
$(legacy_defconfigs):
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)
|