2 # Kbuild for top-level directory of the kernel
3 # This file takes care of the following:
5 # 2) Generate asm-offsets.h (may need bounds.h)
6 # 3) Check for missing system calls
11 bounds-file := include/generated/bounds.h
13 always := $(bounds-file)
14 targets := $(bounds-file) kernel/bounds.s
16 quiet_cmd_bounds = GEN $@
19 echo "#ifndef __LINUX_BOUNDS_H__"; \
20 echo "#define __LINUX_BOUNDS_H__"; \
22 echo " * DO NOT MODIFY."; \
24 echo " * This file was generated by Kbuild"; \
28 sed -ne $(sed-y) $<; \
33 # We use internal kbuild rules to avoid the "is up to date" message from make
34 kernel/bounds.s: kernel/bounds.c FORCE
35 $(Q)mkdir -p $(dir $@)
36 $(call if_changed_dep,cc_s_c)
38 $(obj)/$(bounds-file): kernel/bounds.s Kbuild
39 $(Q)mkdir -p $(dir $@)
43 # 2) Generate asm-offsets.h
46 offsets-file := include/generated/asm-offsets.h
48 always += $(offsets-file)
49 targets += $(offsets-file)
50 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
53 # Default sed regexp - multiline due to syntax constraints
55 "/^->/{s:->#\(.*\):/* \1 */:; \
56 s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
57 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
61 quiet_cmd_offsets = GEN $@
64 echo "#ifndef __ASM_OFFSETS_H__"; \
65 echo "#define __ASM_OFFSETS_H__"; \
67 echo " * DO NOT MODIFY."; \
69 echo " * This file was generated by Kbuild"; \
73 sed -ne $(sed-y) $<; \
78 # We use internal kbuild rules to avoid the "is up to date" message from make
79 arch/$(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)
84 $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
88 # 3) Check for missing system calls
91 always += missing-syscalls
92 targets += missing-syscalls
94 quiet_cmd_syscalls = CALL $<
95 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
97 missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
100 # Keep these two files during make clean
101 no-clean-files := $(bounds-file) $(offsets-file)