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authorAndreas Schwab <schwab@linux-m68k.org>2013-01-20 17:58:47 +0100
committerMichal Marek <mmarek@suse.cz>2013-01-24 22:48:04 +0100
commit6543becf26fff612cdadeed7250ccc8d49f67f27 (patch)
treebcba277bb0c03a81aae46965f3ddc76e582b51f1 /scripts/mod/Makefile
parenta49f0d1ea3ec94fc7cf33a7c36a16343b74bd565 (diff)
downloadop-kernel-dev-6543becf26fff612cdadeed7250ccc8d49f67f27.zip
op-kernel-dev-6543becf26fff612cdadeed7250ccc8d49f67f27.tar.gz
mod/file2alias: make modalias generation safe for cross compiling
Use the target compiler to compute the offsets for the fields of the device_id structures, so that it won't be broken by different alignments between the host and target ABIs. This also fixes missing endian corrections for some modaliases. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts/mod/Makefile')
-rw-r--r--scripts/mod/Makefile35
1 files changed, 35 insertions, 0 deletions
diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
index ff954f8..9415b56 100644
--- a/scripts/mod/Makefile
+++ b/scripts/mod/Makefile
@@ -3,9 +3,44 @@ always := $(hostprogs-y) empty.o
modpost-objs := modpost.o file2alias.o sumversion.o
+devicetable-offsets-file := devicetable-offsets.h
+
+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 __DEVICEVTABLE_OFFSETS_H__"; \
+ echo "#define __DEVICEVTABLE_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
+scripts/mod/devicetable-offsets.s: scripts/mod/devicetable-offsets.c FORCE
+ $(Q)mkdir -p $(dir $@)
+ $(call if_changed_dep,cc_s_c)
+
+$(obj)/$(devicetable-offsets-file): scripts/mod/devicetable-offsets.s
+ $(call cmd,offsets)
+
# dependencies on generated files need to be listed explicitly
$(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h
+$(obj)/file2alias.o: $(obj)/$(devicetable-offsets-file)
quiet_cmd_elfconfig = MKELF $@
cmd_elfconfig = $(obj)/mk_elfconfig < $< > $@
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