| 1 | # |
| 2 | # Kbuild for top-level directory of the kernel |
| 3 | # This file takes care of the following: |
| 4 | # 1) Generate asm-offsets.h |
| 5 | # 2) Check for missing system calls |
| 6 | |
| 7 | ##### |
| 8 | # 1) Generate asm-offsets.h |
| 9 | # |
| 10 | |
| 11 | offsets-file := include/asm-$(SRCARCH)/asm-offsets.h |
| 12 | |
| 13 | always := $(offsets-file) |
| 14 | targets := $(offsets-file) |
| 15 | targets += arch/$(SRCARCH)/kernel/asm-offsets.s |
| 16 | clean-files := $(addprefix $(objtree)/,$(targets)) |
| 17 | |
| 18 | # Default sed regexp - multiline due to syntax constraints |
| 19 | define sed-y |
| 20 | "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}" |
| 21 | endef |
| 22 | # Override default regexp for specific architectures |
| 23 | sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}" |
| 24 | |
| 25 | quiet_cmd_offsets = GEN $@ |
| 26 | define cmd_offsets |
| 27 | (set -e; \ |
| 28 | echo "#ifndef __ASM_OFFSETS_H__"; \ |
| 29 | echo "#define __ASM_OFFSETS_H__"; \ |
| 30 | echo "/*"; \ |
| 31 | echo " * DO NOT MODIFY."; \ |
| 32 | echo " *"; \ |
| 33 | echo " * This file was generated by Kbuild"; \ |
| 34 | echo " *"; \ |
| 35 | echo " */"; \ |
| 36 | echo ""; \ |
| 37 | sed -ne $(sed-y) $<; \ |
| 38 | echo ""; \ |
| 39 | echo "#endif" ) > $@ |
| 40 | endef |
| 41 | |
| 42 | # We use internal kbuild rules to avoid the "is up to date" message from make |
| 43 | arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c FORCE |
| 44 | $(Q)mkdir -p $(dir $@) |
| 45 | $(call if_changed_dep,cc_s_c) |
| 46 | |
| 47 | $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild |
| 48 | $(Q)mkdir -p $(dir $@) |
| 49 | $(call cmd,offsets) |
| 50 | |
| 51 | ##### |
| 52 | # 2) Check for missing system calls |
| 53 | # |
| 54 | |
| 55 | quiet_cmd_syscalls = CALL $< |
| 56 | cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) |
| 57 | |
| 58 | PHONY += missing-syscalls |
| 59 | missing-syscalls: scripts/checksyscalls.sh FORCE |
| 60 | $(call cmd,syscalls) |