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
 
 
 
91quiet_cmd_syscalls = CALL    $<
92      cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
93
94PHONY += missing-syscalls
95missing-syscalls: scripts/checksyscalls.sh FORCE
96	$(call cmd,syscalls)
97
98# Keep these two files during make clean
99no-clean-files := $(bounds-file) $(offsets-file)

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