1#
  2# Kbuild for top-level directory of the kernel
  3# This file takes care of the following:
  4# 1) Generate bounds.h
  5# 2) Generate asm-offsets.h (may need bounds.h)
  6# 3) Check for missing system calls
  7
  8#####
  9# 1) Generate bounds.h
 10
 11bounds-file := include/generated/bounds.h
 12
 13always  := $(bounds-file)
 14targets := $(bounds-file) kernel/bounds.s
 15
 16quiet_cmd_bounds = GEN     $@
 17define cmd_bounds
 18	(set -e; \
 19	 echo "#ifndef __LINUX_BOUNDS_H__"; \
 20	 echo "#define __LINUX_BOUNDS_H__"; \
 21	 echo "/*"; \
 22	 echo " * DO NOT MODIFY."; \
 23	 echo " *"; \
 24	 echo " * This file was generated by Kbuild"; \
 25	 echo " *"; \
 26	 echo " */"; \
 27	 echo ""; \
 28	 sed -ne $(sed-y) $<; \
 29	 echo ""; \
 30	 echo "#endif" ) > $@
 31endef
 32
 33# We use internal kbuild rules to avoid the "is up to date" message from make
 34kernel/bounds.s: kernel/bounds.c FORCE
 35	$(Q)mkdir -p $(dir $@)
 36	$(call if_changed_dep,cc_s_c)
 37
 38$(obj)/$(bounds-file): kernel/bounds.s Kbuild
 39	$(Q)mkdir -p $(dir $@)
 40	$(call cmd,bounds)
 41
 42#####
 43# 2) Generate asm-offsets.h
 44#
 45
 46offsets-file := include/generated/asm-offsets.h
 47
 48always  += $(offsets-file)
 49targets += $(offsets-file)
 50targets += arch/$(SRCARCH)/kernel/asm-offsets.s
 51
 52
 53# Default sed regexp - multiline due to syntax constraints
 54define sed-y
 55	"/^->/{s:->#\(.*\):/* \1 */:; \
 56	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
 57	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
 58	s:->::; p;}"
 59endef
 60
 61quiet_cmd_offsets = GEN     $@
 62define cmd_offsets
 63	(set -e; \
 64	 echo "#ifndef __ASM_OFFSETS_H__"; \
 65	 echo "#define __ASM_OFFSETS_H__"; \
 66	 echo "/*"; \
 67	 echo " * DO NOT MODIFY."; \
 68	 echo " *"; \
 69	 echo " * This file was generated by Kbuild"; \
 70	 echo " *"; \
 71	 echo " */"; \
 72	 echo ""; \
 73	 sed -ne $(sed-y) $<; \
 74	 echo ""; \
 75	 echo "#endif" ) > $@
 76endef
 77
 78# We use internal kbuild rules to avoid the "is up to date" message from make
 79arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
 80                                      $(obj)/$(bounds-file) FORCE
 81	$(Q)mkdir -p $(dir $@)
 82	$(call if_changed_dep,cc_s_c)
 83
 84$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
 85	$(call cmd,offsets)
 86
 87#####
 88# 3) Check for missing system calls
 89#
 90
 91always += missing-syscalls
 92targets += missing-syscalls
 93
 94quiet_cmd_syscalls = CALL    $<
 95      cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
 96
 97missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
 98	$(call cmd,syscalls)
 99
100# Keep these two files during make clean
101no-clean-files := $(bounds-file) $(offsets-file)