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-$(ARCH)/asm-offsets.h
   12: 
   13: always  := $(offsets-file)
   14: targets := $(offsets-file)
   15: targets += arch/$(ARCH)/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" ) > $@
   40: endef
   41: 
   42: # We use internal kbuild rules to avoid the "is up to date" message from make
   43: arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE
   44:         $(Q)mkdir -p $(dir $@)
   45:         $(call if_changed_dep,cc_s_c)
   46: 
   47: $(obj)/$(offsets-file): arch/$(ARCH)/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)