1 # SPDX-License-Identifier: GPL-2.0
2 # include/asm-generic contains a lot of files
3 # verbatim by several architectures.
4 #
5 # This Makefile generates arch/$(SRCARCH)/incl
6 # headers from multiple sources:
7 # - a small wrapper to include the correspond
8 # is generated for each file listed as gene
9 # - uapi/asm/unistd_*.h files listed as sysca
10 # syscall.tbl with the __NR_* macros
11 # - Corresponding asm/syscall_table_*.h are g
12
13 PHONY := all
14 all:
15
16 src := $(srctree)/$(subst /generated,,$(obj))
17
18 syscall_abis_32 += common,32
19 syscall_abis_64 += common,64
20 syscalltbl := $(srctree)/scripts/syscall.tbl
21 syshdr-args := --emit-nr
22
23 # let architectures override $(syscall_abis_%)
24 -include $(srctree)/arch/$(SRCARCH)/kernel/Mak
25 include $(srctree)/scripts/Kbuild.include
26 -include $(kbuild-file)
27
28 syshdr := $(srctree)/scripts/syscallhdr.sh
29 systbl := $(srctree)/scripts/syscalltbl.sh
30
31 # $(generic)/Kbuild lists mandatory-y. Exclude
32 ifneq ($(SRCARCH),um)
33 include $(srctree)/$(generic)/Kbuild
34 endif
35
36 redundant := $(filter $(mandatory-y) $(generat
37 redundant += $(foreach f, $(generic-y), $(if $
38 redundant := $(sort $(redundant))
39 $(if $(redundant),\
40 $(warning redundant generic-y found in
41
42 # If arch does not implement mandatory headers
43 mandatory-y := $(filter-out $(generated-y), $(
44 generic-y += $(foreach f, $(mandatory-y), $(
45
46 generic-y := $(addprefix $(obj)/, $(generic-
47 syscall-y := $(addprefix $(obj)/, $(syscall-
48 generated-y := $(addprefix $(obj)/, $(generate
49
50 # Remove stale wrappers when the corresponding
51 old-headers := $(wildcard $(obj)/*.h)
52 unwanted := $(filter-out $(generic-y) $(gen
53
54 quiet_cmd_wrap = WRAP $@
55 cmd_wrap = echo "\#include <asm-generic/
56
57 quiet_cmd_remove = REMOVE $(unwanted)
58 cmd_remove = rm -f $(unwanted)
59
60 quiet_cmd_syshdr = SYSHDR $@
61 cmd_syshdr = $(CONFIG_SHELL) $(syshdr) \
62 $(if $(syshdr-args-$*),$(sy
63 $(if $(syscall_compat),--pr
64 --abis $(subst $(space),$(c
65 $< $@
66
67 quiet_cmd_systbl = SYSTBL $@
68 cmd_systbl = $(CONFIG_SHELL) $(systbl) \
69 $(if $(systbl-args-$*),$(sy
70 --abis $(subst $(space),$(c
71 $< $@
72
73 all: $(generic-y) $(syscall-y)
74 $(if $(unwanted),$(call cmd,remove))
75 @:
76
77 $(obj)/%.h: $(srctree)/$(generic)/%.h
78 $(call cmd,wrap)
79
80 $(obj)/unistd_%.h: $(syscalltbl) $(syshdr) FOR
81 $(call if_changed,syshdr)
82
83 $(obj)/unistd_compat_%.h: syscall_compat:=1
84 $(obj)/unistd_compat_%.h: $(syscalltbl) $(sysh
85 $(call if_changed,syshdr)
86
87 $(obj)/syscall_table_%.h: $(syscalltbl) $(syst
88 $(call if_changed,systbl)
89
90 targets := $(syscall-y)
91
92 # Create output directory. Skip it if at least
93 # since we know the output directory already e
94 ifeq ($(old-headers),)
95 $(shell mkdir -p $(obj))
96 endif
97
98 PHONY += FORCE
99
100 FORCE:
101
102 existing-targets := $(wildcard $(sort $(target
103
104 -include $(foreach f,$(existing-targets),$(dir
105
106 .PHONY: $(PHONY)
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