1 # SPDX-License-Identifier: GPL-2.0 << 2 # 1 # 3 # Kbuild for top-level directory of the kernel 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 >> 11 bounds-file := include/linux/bounds.h >> 12 >> 13 always := $(bounds-file) >> 14 targets := $(bounds-file) kernel/bounds.s >> 15 >> 16 quiet_cmd_bounds = GEN $@ >> 17 define 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" ) > $@ >> 31 endef >> 32 >> 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) >> 37 >> 38 $(obj)/$(bounds-file): kernel/bounds.s Kbuild >> 39 $(Q)mkdir -p $(dir $@) >> 40 $(call cmd,bounds) 4 41 5 # Prepare global headers and check sanity befo !! 42 ##### 6 # -------------------------------------------- !! 43 # 2) Generate asm-offsets.h 7 !! 44 # 8 # Generate bounds.h << 9 << 10 bounds-file := include/generated/bounds.h << 11 << 12 targets := kernel/bounds.s << 13 << 14 $(bounds-file): kernel/bounds.s FORCE << 15 $(call filechk,offsets,__LINUX_BOUNDS_ << 16 << 17 # Generate timeconst.h << 18 << 19 timeconst-file := include/generated/timeconst. << 20 << 21 filechk_gentimeconst = echo $(CONFIG_HZ) | bc << 22 << 23 $(timeconst-file): kernel/time/timeconst.bc FO << 24 $(call filechk,gentimeconst) << 25 << 26 # Generate asm-offsets.h << 27 45 28 offsets-file := include/generated/asm-offsets. !! 46 offsets-file := include/asm/asm-offsets.h 29 47 >> 48 always += $(offsets-file) >> 49 targets += $(offsets-file) 30 targets += arch/$(SRCARCH)/kernel/asm-offsets. 50 targets += arch/$(SRCARCH)/kernel/asm-offsets.s 31 51 32 arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeco << 33 52 34 $(offsets-file): arch/$(SRCARCH)/kernel/asm-of !! 53 # Default sed regexp - multiline due to syntax constraints 35 $(call filechk,offsets,__ASM_OFFSETS_H !! 54 define sed-y >> 55 "/^->/{s:->#\(.*\):/* \1 */:; \ >> 56 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ >> 57 s:->::; p;}" >> 58 endef >> 59 >> 60 quiet_cmd_offsets = GEN $@ >> 61 define cmd_offsets >> 62 (set -e; \ >> 63 echo "#ifndef __ASM_OFFSETS_H__"; \ >> 64 echo "#define __ASM_OFFSETS_H__"; \ >> 65 echo "/*"; \ >> 66 echo " * DO NOT MODIFY."; \ >> 67 echo " *"; \ >> 68 echo " * This file was generated by Kbuild"; \ >> 69 echo " *"; \ >> 70 echo " */"; \ >> 71 echo ""; \ >> 72 sed -ne $(sed-y) $<; \ >> 73 echo ""; \ >> 74 echo "#endif" ) > $@ >> 75 endef >> 76 >> 77 # We use internal kbuild rules to avoid the "is up to date" message from make >> 78 arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ >> 79 $(obj)/$(bounds-file) FORCE >> 80 $(Q)mkdir -p $(dir $@) >> 81 $(call if_changed_dep,cc_s_c) 36 82 37 # Check for missing system calls !! 83 $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild >> 84 $(call cmd,offsets) >> 85 >> 86 ##### >> 87 # 3) Check for missing system calls >> 88 # 38 89 39 quiet_cmd_syscalls = CALL $< 90 quiet_cmd_syscalls = CALL $< 40 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) !! 91 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) 41 92 42 PHONY += missing-syscalls 93 PHONY += missing-syscalls 43 missing-syscalls: scripts/checksyscalls.sh $(o !! 94 missing-syscalls: scripts/checksyscalls.sh FORCE 44 $(call cmd,syscalls) 95 $(call cmd,syscalls) 45 96 46 # Check the manual modification of atomic head !! 97 # Delete all targets during make clean 47 !! 98 clean-files := $(addprefix $(objtree)/,$(filter-out $(bounds-file) $(offsets-file),$(targets))) 48 quiet_cmd_check_sha1 = CHKSHA1 $< << 49 cmd_check_sha1 = \ << 50 if ! command -v sha1sum >/dev/null; th << 51 echo "warning: cannot check th << 52 exit 0; \ << 53 fi; \ << 54 if [ "$$(sed -n '$$s:// ::p' $<)" != \ << 55 "$$(sed '$$d' $< | sha1sum | sed << 56 echo "error: $< has been modif << 57 exit 1; \ << 58 fi; \ << 59 touch $@ << 60 << 61 atomic-checks += $(addprefix $(obj)/.checked-, << 62 atomic-arch-fallback.h \ << 63 atomic-instrumented.h \ << 64 atomic-long.h) << 65 << 66 targets += $(atomic-checks) << 67 $(atomic-checks): $(obj)/.checked-%: include/l << 68 $(call if_changed,check_sha1) << 69 << 70 # A phony target that depends on all the prepa << 71 << 72 PHONY += prepare << 73 prepare: $(offsets-file) missing-syscalls $(at << 74 @: << 75 << 76 # Ordinary directory descending << 77 # -------------------------------------------- << 78 << 79 obj-y += init/ << 80 obj-y += usr/ << 81 obj-y += arch/$(SRCARCH)/ << 82 obj-y += $(ARCH_CORE) << 83 obj-y += kernel/ << 84 obj-y += certs/ << 85 obj-y += mm/ << 86 obj-y += fs/ << 87 obj-y += ipc/ << 88 obj-y += security/ << 89 obj-y += crypto/ << 90 obj-$(CONFIG_BLOCK) += block/ << 91 obj-$(CONFIG_IO_URING) += io_uring/ << 92 obj-$(CONFIG_RUST) += rust/ << 93 obj-y += $(ARCH_LIB) << 94 obj-y += drivers/ << 95 obj-y += sound/ << 96 obj-$(CONFIG_SAMPLES) += samples/ << 97 obj-$(CONFIG_NET) += net/ << 98 obj-y += virt/ << 99 obj-y += $(ARCH_DRIVERS) <<
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