diff options
Diffstat (limited to 'Kbuild')
| -rw-r--r-- | Kbuild | 98 |
1 files changed, 98 insertions, 0 deletions
@@ -0,0 +1,98 @@ +# +# 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/linux/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/asm/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:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#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 +# + +quiet_cmd_syscalls = CALL $< + cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) + +PHONY += missing-syscalls +missing-syscalls: scripts/checksyscalls.sh FORCE + $(call cmd,syscalls) + +# Delete all targets during make clean +clean-files := $(addprefix $(objtree)/,$(filter-out $(bounds-file) $(offsets-file),$(targets))) |
