| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 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 | |
| 11 | bounds-file := include/generated/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) |
| 41 | |
| 42 | ##### |
| 43 | # 2) Generate asm-offsets.h |
| 44 | # |
| 45 | |
| 46 | offsets-file := include/generated/asm-offsets.h |
| 47 | |
| 48 | always += $(offsets-file) |
| 49 | targets += $(offsets-file) |
| 50 | targets += arch/$(SRCARCH)/kernel/asm-offsets.s |
| 51 | |
| 52 | |
| 53 | # Default sed regexp - multiline due to syntax constraints |
| 54 | define sed-y |
| 55 | "/^->/{s:->#\(.*\):/* \1 */:; \ |
| 56 | s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ |
| 57 | s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ |
| 58 | s:->::; p;}" |
| 59 | endef |
| 60 | |
| 61 | quiet_cmd_offsets = GEN $@ |
| 62 | define 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" ) > $@ |
| 76 | endef |
| 77 | |
| 78 | # We use internal kbuild rules to avoid the "is up to date" message from make |
| 79 | arch/$(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 | |
| 91 | always += missing-syscalls |
| 92 | targets += missing-syscalls |
| 93 | |
| 94 | quiet_cmd_syscalls = CALL $< |
| 95 | cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) |
| 96 | |
| 97 | missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE |
| 98 | $(call cmd,syscalls) |
| 99 | |
| 100 | # Keep these two files during make clean |
| 101 | no-clean-files := $(bounds-file) $(offsets-file) |