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# 5) Generate constants.py (may need bounds.h)
  9
 10# Default sed regexp - multiline due to syntax constraints
 11define sed-y
 12	"/^->/{s:->#\(.*\):/* \1 */:; \
 13	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
 14	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
 15	s:->::; p;}"
 16endef
 17
 18# Use filechk to avoid rebuilds when a header changes, but the resulting file
 19# does not
 20define filechk_offsets
 
 
 21	(set -e; \
 22	 echo "#ifndef $2"; \
 23	 echo "#define $2"; \
 24	 echo "/*"; \
 25	 echo " * DO NOT MODIFY."; \
 26	 echo " *"; \
 27	 echo " * This file was generated by Kbuild"; \
 
 28	 echo " */"; \
 29	 echo ""; \
 30	 sed -ne $(sed-y); \
 31	 echo ""; \
 32	 echo "#endif" )
 33endef
 34
 35#####
 36# 1) Generate bounds.h
 37
 38bounds-file := include/generated/bounds.h
 39
 40always  := $(bounds-file)
 41targets := kernel/bounds.s
 42
 43# We use internal kbuild rules to avoid the "is up to date" message from make
 44kernel/bounds.s: kernel/bounds.c FORCE
 45	$(Q)mkdir -p $(dir $@)
 46	$(call if_changed_dep,cc_s_c)
 47
 48$(obj)/$(bounds-file): kernel/bounds.s FORCE
 49	$(call filechk,offsets,__LINUX_BOUNDS_H__)
 50
 51#####
 52# 2) Generate timeconst.h
 53
 54timeconst-file := include/generated/timeconst.h
 55
 56targets += $(timeconst-file)
 57
 58quiet_cmd_gentimeconst = GEN     $@
 59define cmd_gentimeconst
 60	(echo $(CONFIG_HZ) | bc -q $< ) > $@
 61endef
 62define filechk_gentimeconst
 63	(echo $(CONFIG_HZ) | bc -q $< )
 64endef
 65
 66$(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE
 67	$(call filechk,gentimeconst)
 68
 69#####
 70# 3) Generate asm-offsets.h
 71#
 72
 73offsets-file := include/generated/asm-offsets.h
 74
 75always  += $(offsets-file)
 
 76targets += arch/$(SRCARCH)/kernel/asm-offsets.s
 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                                      $(obj)/$(timeconst-file) $(obj)/$(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 FORCE
 85	$(call filechk,offsets,__ASM_OFFSETS_H__)
 86
 87#####
 88# 4) 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	$(call cmd,syscalls)
 99
100#####
101# 5) Generate constants for Python GDB integration
102#
103
104extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py
105
106build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file)
107	@$(MAKE) $(build)=scripts/gdb/linux $@
108
109# Keep these three files during make clean
110no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-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 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)