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Commit ebf003f0 authored by Matthias Kaehlcke's avatar Matthias Kaehlcke Committed by Masahiro Yamada
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kbuild: Consolidate header generation from ASM offset information 



Largely redundant code is used in different places to generate C headers
from offset information extracted from assembly language output.
Consolidate the code in Makefile.lib and use this instead.

Signed-off-by: default avatarMatthias Kaehlcke <mka@chromium.org>
Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
parent 6748cb3c

Kbuild

+0 −25
Original line number Diff line number Diff line
@@ -7,31 +7,6 @@ 
# 4) Check for missing system calls

# 5) Generate constants.py (may need bounds.h)



# Default sed regexp - multiline due to syntax constraints

define sed-y

	"/^->/{s:->#\(.*\):/* \1 */:; \

	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \

	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \

	s:->::; p;}"

endef



# Use filechk to avoid rebuilds when a header changes, but the resulting file

# does not

define filechk_offsets

	(set -e; \

	 echo "#ifndef $2"; \

	 echo "#define $2"; \

	 echo "/*"; \

	 echo " * DO NOT MODIFY."; \

	 echo " *"; \

	 echo " * This file was generated by Kbuild"; \

	 echo " */"; \

	 echo ""; \

	 sed -ne $(sed-y); \

	 echo ""; \

	 echo "#endif" )

endef



#####

# 1) Generate bounds.h

arch/ia64/kernel/Makefile

+2 −24
Original line number Diff line number Diff line
@@ -50,32 +50,10 @@ CFLAGS_traps.o += -mfixed-range=f2-f5,f16-f31 
# The gate DSO image is built using a special linker script.

include $(src)/Makefile.gate



# Calculate NR_IRQ = max(IA64_NATIVE_NR_IRQS, XEN_NR_IRQS, ...) based on config

define sed-y

	"/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"

endef

quiet_cmd_nr_irqs = GEN     $@

define cmd_nr_irqs

	(set -e; \

	 echo "#ifndef __ASM_NR_IRQS_H__"; \

	 echo "#define __ASM_NR_IRQS_H__"; \

	 echo "/*"; \

	 echo " * DO NOT MODIFY."; \

	 echo " *"; \

	 echo " * This file was generated by Kbuild"; \

	 echo " *"; \

	 echo " */"; \

	 echo ""; \

	 sed -ne $(sed-y) $<; \

	 echo ""; \

	 echo "#endif" ) > $@

endef



# We use internal kbuild rules to avoid the "is up to date" message from make

arch/$(SRCARCH)/kernel/nr-irqs.s: arch/$(SRCARCH)/kernel/nr-irqs.c

	$(Q)mkdir -p $(dir $@)

	$(call if_changed_dep,cc_s_c)



include/generated/nr-irqs.h: arch/$(SRCARCH)/kernel/nr-irqs.s

	$(Q)mkdir -p $(dir $@)

	$(call cmd,nr_irqs)
 
include/generated/nr-irqs.h: arch/$(SRCARCH)/kernel/nr-irqs.s FORCE

	$(call filechk,offsets,__ASM_NR_IRQS_H__)

scripts/Makefile.lib

+28 −0
Original line number Diff line number Diff line
@@ -408,3 +408,31 @@ quiet_cmd_xzmisc = XZMISC $@ 
cmd_xzmisc = (cat $(filter-out FORCE,$^) | \

	xz --check=crc32 --lzma2=dict=1MiB) > $@ || \

	(rm -f $@ ; false)



# ASM offsets

# ---------------------------------------------------------------------------



# Default sed regexp - multiline due to syntax constraints

define sed-offsets

	"/^->/{s:->#\(.*\):/* \1 */:; \

	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \

	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \

	s:->::; p;}"

endef



# Use filechk to avoid rebuilds when a header changes, but the resulting file

# does not

define filechk_offsets

	(set -e; \

	 echo "#ifndef $2"; \

	 echo "#define $2"; \

	 echo "/*"; \

	 echo " * DO NOT MODIFY."; \

	 echo " *"; \

	 echo " * This file was generated by Kbuild"; \

	 echo " */"; \

	 echo ""; \

	 sed -ne $(sed-offsets); \

	 echo ""; \

	 echo "#endif" )

endef

scripts/mod/Makefile

+2 −26
Original line number Diff line number Diff line
@@ -7,32 +7,8 @@ modpost-objs := modpost.o file2alias.o sumversion.o 


devicetable-offsets-file := devicetable-offsets.h



define sed-y

	"/^->/{s:->#\(.*\):/* \1 */:; \

	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \

	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \

	s:->::; p;}"

endef



quiet_cmd_offsets = GEN     $@

define cmd_offsets

	(set -e; \

	 echo "#ifndef __DEVICETABLE_OFFSETS_H__"; \

	 echo "#define __DEVICETABLE_OFFSETS_H__"; \

	 echo "/*"; \

	 echo " * DO NOT MODIFY."; \

	 echo " *"; \

	 echo " * This file was generated by Kbuild"; \

	 echo " *"; \

	 echo " */"; \

	 echo ""; \

	 sed -ne $(sed-y) $<; \

	 echo ""; \

	 echo "#endif" ) > $@

endef



$(obj)/$(devicetable-offsets-file): $(obj)/devicetable-offsets.s

	$(call if_changed,offsets)

$(obj)/$(devicetable-offsets-file): $(obj)/devicetable-offsets.s FORCE

	$(call filechk,offsets,__DEVICETABLE_OFFSETS_H__)



targets += $(devicetable-offsets-file) devicetable-offsets.s