40 lines
1.4 KiB
Makefile
40 lines
1.4 KiB
Makefile
#
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# Makefile for the Linux/Xtensa kernel.
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#
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extra-y := head.o vmlinux.lds
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obj-y := align.o coprocessor.o entry.o irq.o pci-dma.o platform.o process.o \
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ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \
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vectors.o
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obj-$(CONFIG_KGDB) += xtensa-stub.o
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obj-$(CONFIG_PCI) += pci.o
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obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
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obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
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obj-$(CONFIG_SMP) += smp.o mxhead.o
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AFLAGS_head.o += -mtext-section-literals
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# In the Xtensa architecture, assembly generates literals which must always
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# precede the L32R instruction with a relative offset less than 256 kB.
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# Therefore, the .text and .literal section must be combined in parenthesis
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# in the linker script, such as: *(.literal .text).
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#
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# We need to post-process the generated vmlinux.lds scripts to convert
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# *(xxx.text) to *(xxx.literal xxx.text) for the following text sections:
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# .text .ref.text .*init.text .*exit.text .text.*
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#
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# Replicate rules in scripts/Makefile.build
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sed-y = -e 's/\*(\(\.[a-z]*it\|\.ref\|\)\.text)/*(\1.literal \1.text)/g' \
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-e 's/\.text\.unlikely/.literal.unlikely .text.unlikely/g' \
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-e 's/\*(\(\.text\.[a-z]*\))/*(\1.literal \1)/g'
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quiet_cmd__cpp_lds_S = LDS $@
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cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $< \
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| sed $(sed-y) >$@
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$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
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$(call if_changed_dep,_cpp_lds_S)
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