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) 102