diff options
Diffstat (limited to 'Kbuild')
| -rw-r--r-- | Kbuild | 174 |
1 files changed, 92 insertions, 82 deletions
@@ -1,101 +1,111 @@ +# SPDX-License-Identifier: GPL-2.0 # # Kbuild for top-level directory of the kernel -# This file takes care of the following: -# 1) Generate bounds.h -# 2) Generate asm-offsets.h (may need bounds.h) -# 3) Check for missing system calls -##### -# 1) Generate bounds.h +# Prepare global headers and check sanity before descending into sub-directories +# --------------------------------------------------------------------------- + +# Generate bounds.h bounds-file := include/generated/bounds.h -always := $(bounds-file) -targets := $(bounds-file) kernel/bounds.s - -quiet_cmd_bounds = GEN $@ -define cmd_bounds - (set -e; \ - echo "#ifndef __LINUX_BOUNDS_H__"; \ - echo "#define __LINUX_BOUNDS_H__"; \ - echo "/*"; \ - echo " * DO NOT MODIFY."; \ - echo " *"; \ - echo " * This file was generated by Kbuild"; \ - echo " *"; \ - echo " */"; \ - echo ""; \ - sed -ne $(sed-y) $<; \ - echo ""; \ - echo "#endif" ) > $@ -endef - -# We use internal kbuild rules to avoid the "is up to date" message from make -kernel/bounds.s: kernel/bounds.c FORCE - $(Q)mkdir -p $(dir $@) - $(call if_changed_dep,cc_s_c) - -$(obj)/$(bounds-file): kernel/bounds.s Kbuild - $(Q)mkdir -p $(dir $@) - $(call cmd,bounds) - -##### -# 2) Generate asm-offsets.h -# +targets := kernel/bounds.s + +$(bounds-file): kernel/bounds.s FORCE + $(call filechk,offsets,__LINUX_BOUNDS_H__) + +# Generate timeconst.h + +timeconst-file := include/generated/timeconst.h + +filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $< + +$(timeconst-file): kernel/time/timeconst.bc FORCE + $(call filechk,gentimeconst) + +# Generate asm-offsets.h offsets-file := include/generated/asm-offsets.h -always += $(offsets-file) -targets += $(offsets-file) targets += arch/$(SRCARCH)/kernel/asm-offsets.s +arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file) -# Default sed regexp - multiline due to syntax constraints -define sed-y - "/^->/{s:->#\(.*\):/* \1 */:; \ - s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ - s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ - s:->::; p;}" -endef - -quiet_cmd_offsets = GEN $@ -define cmd_offsets - (set -e; \ - echo "#ifndef __ASM_OFFSETS_H__"; \ - echo "#define __ASM_OFFSETS_H__"; \ - echo "/*"; \ - echo " * DO NOT MODIFY."; \ - echo " *"; \ - echo " * This file was generated by Kbuild"; \ - echo " *"; \ - echo " */"; \ - echo ""; \ - sed -ne $(sed-y) $<; \ - echo ""; \ - echo "#endif" ) > $@ -endef - -# We use internal kbuild rules to avoid the "is up to date" message from make -arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ - $(obj)/$(bounds-file) FORCE - $(Q)mkdir -p $(dir $@) - $(call if_changed_dep,cc_s_c) - -$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild - $(call cmd,offsets) - -##### -# 3) Check for missing system calls -# +$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE + $(call filechk,offsets,__ASM_OFFSETS_H__) + +# Generate rq-offsets.h + +rq-offsets-file := include/generated/rq-offsets.h + +targets += kernel/sched/rq-offsets.s + +kernel/sched/rq-offsets.s: $(offsets-file) + +$(rq-offsets-file): kernel/sched/rq-offsets.s FORCE + $(call filechk,offsets,__RQ_OFFSETS_H__) -always += missing-syscalls -targets += missing-syscalls +# Check for missing system calls quiet_cmd_syscalls = CALL $< cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) -missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE +PHONY += missing-syscalls +missing-syscalls: scripts/checksyscalls.sh $(rq-offsets-file) $(call cmd,syscalls) -# Keep these two files during make clean -no-clean-files := $(bounds-file) $(offsets-file) +# Check the manual modification of atomic headers + +quiet_cmd_check_sha1 = CHKSHA1 $< + cmd_check_sha1 = \ + if ! command -v sha1sum >/dev/null; then \ + echo "warning: cannot check the header due to sha1sum missing"; \ + exit 0; \ + fi; \ + if [ "$$(sed -n '$$s:// ::p' $<)" != \ + "$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \ + echo "error: $< has been modified." >&2; \ + exit 1; \ + fi; \ + touch $@ + +atomic-checks += $(addprefix $(obj)/.checked-, \ + atomic-arch-fallback.h \ + atomic-instrumented.h \ + atomic-long.h) + +targets += $(atomic-checks) +$(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE + $(call if_changed,check_sha1) + +# A phony target that depends on all the preparation targets + +PHONY += prepare +prepare: $(offsets-file) missing-syscalls $(atomic-checks) + @: + +# Ordinary directory descending +# --------------------------------------------------------------------------- + +obj-y += init/ +obj-y += usr/ +obj-y += arch/$(SRCARCH)/ +obj-y += $(ARCH_CORE) +obj-y += kernel/ +obj-y += certs/ +obj-y += mm/ +obj-y += fs/ +obj-y += ipc/ +obj-y += security/ +obj-y += crypto/ +obj-$(CONFIG_BLOCK) += block/ +obj-$(CONFIG_IO_URING) += io_uring/ +obj-$(CONFIG_RUST) += rust/ +obj-y += $(ARCH_LIB) +obj-y += drivers/ +obj-y += sound/ +obj-$(CONFIG_SAMPLES) += samples/ +obj-$(CONFIG_NET) += net/ +obj-y += virt/ +obj-y += $(ARCH_DRIVERS) +obj-$(CONFIG_DRM_HEADER_TEST) += include/ |