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-rw-r--r--Kbuild45
1 files changed, 43 insertions, 2 deletions
diff --git a/Kbuild b/Kbuild
index 0c3f408..3296096 100644
--- a/Kbuild
+++ b/Kbuild
@@ -1,2 +1,43 @@
-# This does nothing, but some (dummy) comments here.
-# If this file gets empty, it is removed by "make distclean".
+#####
+# 1) Generate asm-offsets.h
+#
+
+offsets-file := include/generated/asm-offsets.h
+
+always += $(offsets-file)
+targets += $(offsets-file)
+targets += arch/$(SRCARCH)/lib/asm-offsets.s
+
+
+# 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)/lib/asm-offsets.s: arch/$(SRCARCH)/lib/asm-offsets.c FORCE
+ $(Q)mkdir -p $(dir $@)
+ $(call if_changed_dep,cc_s_c)
+
+$(obj)/$(offsets-file): arch/$(SRCARCH)/lib/asm-offsets.s Kbuild
+ $(call cmd,offsets)