#

# Kbuild for top-level directory of the kernel

# This file takes care of the following:

# 1) Generate bounds.h

# 2) Generate asm-offsets.h (may need bounds.h)

# 3) Check for missing system calls

#####

# 1) Generate bounds.h

bounds-file := include/generated/bounds.h

always := $(bounds-file)

targets := $(bounds-file) kernel/bounds.s

quiet_cmd_bounds = GEN $@

define cmd_bounds

(set -e; \

echo "#ifndef __LINUX_BOUNDS_H__"; \

echo "#define __LINUX_BOUNDS_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

kernel/bounds.s: kernel/bounds.c FORCE

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

$(call if_changed_dep,cc_s_c)

$(obj)/$(bounds-file): kernel/bounds.s Kbuild

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

$(call cmd,bounds)

#####

# 2) Generate asm-offsets.h

#

offsets-file := include/generated/asm-offsets.h

always += $(offsets-file)

targets += $(offsets-file)

targets += arch/$(SRCARCH)/kernel/asm-offsets.s

# 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

quiet_cmd_offsets = GEN $@

define cmd_offsets

(set -e; \

echo "#ifndef __ASM_OFFSETS_H__"; \

echo "#define __ASM_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

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

arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \

$(obj)/$(bounds-file) FORCE

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

$(call if_changed_dep,cc_s_c)

$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild

$(call cmd,offsets)

#####

# 3) Check for missing system calls

#

always += missing-syscalls

targets += missing-syscalls

quiet_cmd_syscalls = CALL $<

cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)

missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE

$(call cmd,syscalls)

# Keep these two files during make clean

no-clean-files := $(bounds-file) $(offsets-file)