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-rw-r--r--scripts/Makefile.build55
1 files changed, 35 insertions, 20 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index c1da14b9f59d..6a2153891592 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -151,16 +151,16 @@ cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $<
151$(obj)/%.i: $(src)/%.c FORCE 151$(obj)/%.i: $(src)/%.c FORCE
152 $(call if_changed_dep,cc_i_c) 152 $(call if_changed_dep,cc_i_c)
153 153
154cmd_gensymtypes = \ 154cmd_genksyms = \
155 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ 155 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \
156 $(GENKSYMS) -T $@ -a $(ARCH) \ 156 $(GENKSYMS) -T $@ -A -a $(ARCH) \
157 $(if $(KBUILD_PRESERVE),-p) \ 157 $(if $(KBUILD_PRESERVE),-p) \
158 $(if $(1),-r $(firstword $(wildcard $(@:.symtypes=.symref) /dev/null))) 158 $(if $(1),-r $(firstword $(wildcard $(@:.symtypes=.symref) /dev/null)))
159 159
160quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ 160quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
161cmd_cc_symtypes_c = \ 161cmd_cc_symtypes_c = \
162 set -e; \ 162 set -e; \
163 $(call cmd_gensymtypes, true) >/dev/null; \ 163 $(call cmd_genksyms, true) >/dev/null; \
164 test -s $@ || rm -f $@ 164 test -s $@ || rm -f $@
165 165
166$(obj)/%.symtypes : $(src)/%.c FORCE 166$(obj)/%.symtypes : $(src)/%.c FORCE
@@ -177,28 +177,38 @@ cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
177 177
178else 178else
179# When module versioning is enabled the following steps are executed: 179# When module versioning is enabled the following steps are executed:
180# o compile a .tmp_<file>.o from <file>.c 180# o compile a .tmp_<file>.s from <file>.c
181# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does 181# o if .tmp_<file>.s doesn't contain a __ksymtab version, i.e. does
182# not export symbols, we just rename .tmp_<file>.o to <file>.o and 182# not export symbols, we just assemble .tmp_<file>.s to <file>.o and
183# are done. 183# are done.
184# o otherwise, we calculate symbol versions using the good old 184# o otherwise, we calculate symbol versions using the good old
185# genksyms on the preprocessed source and postprocess them in a way 185# genksyms on the preprocessed source and postprocess them in a way
186# that they are usable as a linker script 186# that they are usable as assembly source
187# o generate <file>.o from .tmp_<file>.o using the linker to 187# o assemble <file>.o from .tmp_<file>.s forcing inclusion of directives
188# replace the unresolved symbols __crc_exported_symbol with 188# defining the actual values of __crc_*, followed by objcopy-ing them
189# the actual value of the checksum generated by genksyms 189# to force these symbols to be local to permit stripping them later.
190s_file = $(@D)/.tmp_$(@F:.o=.s)
191v_file = $(@D)/.tmp_$(@F:.o=.v)
192tmp_o_file = $(@D)/.tmp_$(@F)
193no_g_c_flags = $(filter-out -g%,$(c_flags))
194
195cmd_cc_o_c = $(CC) $(c_flags) -S -o $(s_file) $<
190 196
191cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
192cmd_modversions = \ 197cmd_modversions = \
193 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ 198 if grep -q __ksymtab $(s_file); then \
194 $(call cmd_gensymtypes, $(KBUILD_SYMTYPES)) \ 199 if $(call cmd_genksyms, $(KBUILD_SYMTYPES)) > $(v_file) \
195 > $(@D)/.tmp_$(@F:.o=.ver); \ 200 && $(CC) $(no_g_c_flags) -c -Wa,$(v_file) \
196 \ 201 -o $(tmp_o_file) $(s_file) \
197 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ 202 && $(OBJCOPY) -L '__crc_*' -L '___crc_*' -w \
198 -T $(@D)/.tmp_$(@F:.o=.ver); \ 203 $(tmp_o_file) $@; \
199 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ 204 then \
205 : ; \
206 else \
207 rm -f $@; exit 1; \
208 fi; \
200 else \ 209 else \
201 mv -f $(@D)/.tmp_$(@F) $@; \ 210 rm -f $(v_file); \
211 $(CC) $(no_g_c_flags) -c -o $@ $(s_file); \
202 fi; 212 fi;
203endif 213endif
204 214
@@ -221,7 +231,12 @@ define rule_cc_o_c
221 $(cmd_record_mcount) \ 231 $(cmd_record_mcount) \
222 scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ 232 scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
223 $(dot-target).tmp; \ 233 $(dot-target).tmp; \
224 rm -f $(depfile); \ 234 if [ -r $(@D)/.tmp_$(@F:.o=.v) ]; then \
235 echo >> $(dot-target).tmp; \
236 echo '$@: $(GENKSYMS)' >> $(dot-target).tmp; \
237 echo '$(GENKSYMS):: ;' >> $(dot-target).tmp; \
238 fi; \
239 rm -f $(depfile) $(@D)/.tmp_$(@F:.o=.?); \
225 mv -f $(dot-target).tmp $(dot-target).cmd 240 mv -f $(dot-target).tmp $(dot-target).cmd
226endef 241endef
227 242