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# |
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# Kbuild for top-level directory of the kernel |
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# This file takes care of the following: |
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# 1) Generate bounds.h |
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# 2) Generate asm-offsets.h (may need bounds.h) |
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# 3) Check for missing system calls |
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|
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##### |
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# 1) Generate bounds.h |
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|
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bounds-file := include/generated/bounds.h |
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|
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always := $(bounds-file) |
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targets := $(bounds-file) kernel/bounds.s |
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|
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quiet_cmd_bounds = GEN $@ |
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define cmd_bounds |
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(set -e; \ |
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echo "#ifndef __LINUX_BOUNDS_H__"; \ |
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echo "#define __LINUX_BOUNDS_H__"; \ |
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echo "/*"; \ |
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echo " * DO NOT MODIFY."; \ |
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echo " *"; \ |
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echo " * This file was generated by Kbuild"; \ |
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echo " *"; \ |
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echo " */"; \ |
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echo ""; \ |
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sed -ne $(sed-y) $<; \ |
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echo ""; \ |
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echo "#endif" ) > $@ |
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endef |
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|
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# We use internal kbuild rules to avoid the "is up to date" message from make |
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kernel/bounds.s: kernel/bounds.c FORCE |
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$(Q)mkdir -p $(dir $@) |
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$(call if_changed_dep,cc_s_c) |
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|
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$(obj)/$(bounds-file): kernel/bounds.s Kbuild |
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$(Q)mkdir -p $(dir $@) |
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$(call cmd,bounds) |
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|
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##### |
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# 2) Generate asm-offsets.h |
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# |
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|
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offsets-file := include/generated/asm-offsets.h |
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|
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always += $(offsets-file) |
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targets += $(offsets-file) |
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targets += arch/$(SRCARCH)/kernel/asm-offsets.s |
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|
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|
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# Default sed regexp - multiline due to syntax constraints |
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define sed-y |
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"/^->/{s:->#\(.*\):/* \1 */:; \ |
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s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ |
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s:->::; p;}" |
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endef |
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|
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quiet_cmd_offsets = GEN $@ |
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define cmd_offsets |
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(set -e; \ |
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echo "#ifndef __ASM_OFFSETS_H__"; \ |
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echo "#define __ASM_OFFSETS_H__"; \ |
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echo "/*"; \ |
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echo " * DO NOT MODIFY."; \ |
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echo " *"; \ |
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echo " * This file was generated by Kbuild"; \ |
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echo " *"; \ |
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echo " */"; \ |
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echo ""; \ |
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sed -ne $(sed-y) $<; \ |
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echo ""; \ |
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echo "#endif" ) > $@ |
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endef |
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|
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# We use internal kbuild rules to avoid the "is up to date" message from make |
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arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ |
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$(obj)/$(bounds-file) FORCE |
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$(Q)mkdir -p $(dir $@) |
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$(call if_changed_dep,cc_s_c) |
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|
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$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild |
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$(call cmd,offsets) |
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|
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##### |
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# 3) Check for missing system calls |
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# |
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|
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quiet_cmd_syscalls = CALL $< |
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cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) |
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|
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PHONY += missing-syscalls |
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missing-syscalls: scripts/checksyscalls.sh FORCE |
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$(call cmd,syscalls) |
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|
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# Delete all targets during make clean |
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clean-files := $(addprefix $(objtree)/,$(filter-out $(bounds-file) $(offsets-file),$(targets))) |
