69 lines
2.0 KiB
Makefile
69 lines
2.0 KiB
Makefile
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GEN_ISR_TABLE := $(srctree)/arch/common/gen_isr_tables.py
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OUTPUT_SRC := isr_tables.c
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OUTPUT_OBJ := isr_tables.o
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ifeq ($(ARCH),arm)
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OUTPUT_FORMAT := elf32-littlearm
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OUTPUT_ARCH := arm
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else
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$(error Output formats not defined for this architecture)
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endif
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GEN_ISR_TABLE_EXTRA_ARGS :=
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ifeq ($(KBUILD_VERBOSE),1)
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GEN_ISR_TABLE_EXTRA_ARGS += --debug
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endif
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ifeq ($(CONFIG_GEN_SW_ISR_TABLE),y)
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GEN_ISR_TABLE_EXTRA_ARGS += --sw-isr-table
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endif
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ifeq ($(CONFIG_GEN_IRQ_VECTOR_TABLE),y)
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GEN_ISR_TABLE_EXTRA_ARGS += --vector-table
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endif
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# Rule to extract the .intList section from the $(PREBUILT_KERNEL) binary
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# and create the source file $(OUTPUT_SRC). This is a C file which contains
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# the interrupt tables.
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quiet_cmd_gen_irq = IRQ $@
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cmd_gen_irq = \
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( \
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$(OBJCOPY) -I $(OUTPUT_FORMAT) -O binary --only-section=.intList \
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$< isrList.bin && \
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$(GEN_ISR_TABLE) --output-source $@ \
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--intlist isrList.bin $(GEN_ISR_TABLE_EXTRA_ARGS) \
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)
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$(OUTPUT_SRC): $(PREBUILT_KERNEL) $(GEN_ISR_TABLE)
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$(call cmd,gen_irq)
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# Build system pattern rules will handle building $(OUTPUT_OBJ) from
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# $(OUTPUT_SRC), nothing we need to do here explicitly for its compilation.
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# Now link the kernel again, this time with the compiled interrupt tables
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# included, replacing the dummy tables defined in arch/common/isr_tables.c
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#
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# On x86, we just strip out the intList with objcopy -j. However this is not
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# very portable; for instance on ARM this results in a zero-sized program
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# header segment which produces a linker warning and gives QEMU fits.
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# Set to NOLOAD instead, now that we have extracted the information we need
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# from it.
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quiet_cmd_lnk_elf = LINK $@
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cmd_lnk_elf = \
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( \
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$(CC) -T linker.cmd $(OUTPUT_OBJ) @$(KERNEL_NAME).lnk \
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-o elf.tmp && \
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$(OBJCOPY) -I $(OUTPUT_FORMAT) -O $(OUTPUT_FORMAT) \
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--set-section-flags .intList=noload \
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elf.tmp $@ && \
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rm -f elf.tmp; \
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)
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$(KERNEL_ELF_NAME): $(OUTPUT_OBJ) linker.cmd
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$(call cmd,lnk_elf)
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@$(srctree)/scripts/check_link_map.py $(KERNEL_NAME).map
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@$(WARN_ABOUT_ASSERT)
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@$(WARN_ABOUT_DEPRECATION)
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