5 files changed, 76 insertions, 32 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 $@ $<
 $(obj)/%.i: $(src)/%.c FORCE
         $(call if_changed_dep,cc_i_c)
 
-cmd_gensymtypes =                                                           \
+cmd_genksyms =                                                              \
     $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
-    $(GENKSYMS) -T $@ -a $(ARCH)                                            \
+    $(GENKSYMS) -T $@ -A -a $(ARCH)                                         \
      $(if $(KBUILD_PRESERVE),-p)                                            \
      $(if $(1),-r $(firstword $(wildcard $(@:.symtypes=.symref) /dev/null)))
 
 quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
 cmd_cc_symtypes_c =                                                         \
     set -e;                                                                 \
-    $(call cmd_gensymtypes, true) >/dev/null;                               \
+    $(call cmd_genksyms, true) >/dev/null;                                  \
     test -s $@ || rm -f $@
 
 $(obj)/%.symtypes : $(src)/%.c FORCE
@@ -177,28 +177,38 @@ cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
 
 else
 # When module versioning is enabled the following steps are executed:
-# o compile a .tmp_<file>.o from <file>.c
-# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
-#   not export symbols, we just rename .tmp_<file>.o to <file>.o and
+# o compile a .tmp_<file>.s from <file>.c
+# o if .tmp_<file>.s doesn't contain a __ksymtab version, i.e. does
+#   not export symbols, we just assemble .tmp_<file>.s to <file>.o and
 #   are done.
 # o otherwise, we calculate symbol versions using the good old
 #   genksyms on the preprocessed source and postprocess them in a way
-#   that they are usable as a linker script
-# o generate <file>.o from .tmp_<file>.o using the linker to
-#   replace the unresolved symbols __crc_exported_symbol with
-#   the actual value of the checksum generated by genksyms
+#   that they are usable as assembly source
+# o assemble <file>.o from .tmp_<file>.s forcing inclusion of directives
+#   defining the actual values of __crc_*, followed by objcopy-ing them
+#   to force these symbols to be local to permit stripping them later.
+s_file = $(@D)/.tmp_$(@F:.o=.s)
+v_file = $(@D)/.tmp_$(@F:.o=.v)
+tmp_o_file = $(@D)/.tmp_$(@F)
+no_g_c_flags = $(filter-out -g%,$(c_flags))
+
+cmd_cc_o_c = $(CC) $(c_flags) -S -o $(s_file) $<
 
-cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
 cmd_modversions =                                                       \
-        if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then     \
-                $(call cmd_gensymtypes, $(KBUILD_SYMTYPES))             \
-                    > $(@D)/.tmp_$(@F:.o=.ver);                         \
-                                                                        \
-                $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F)              \
-                        -T $(@D)/.tmp_$(@F:.o=.ver);                    \
-                rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);        \
+        if grep -q __ksymtab $(s_file); then                            \
+                if $(call cmd_genksyms, $(KBUILD_SYMTYPES)) > $(v_file) \
+                   && $(CC) $(no_g_c_flags) -c -Wa,$(v_file)            \
+                            -o $(tmp_o_file) $(s_file)                  \
+                   && $(OBJCOPY) -L '__crc_*' -L '___crc_*' -w          \
+                                 $(tmp_o_file) $@;                      \
+                then                                                    \
+                        : ;                                             \
+                else                                                    \
+                        rm -f $@; exit 1;                               \
+                fi;                                                     \
         else                                                            \
-                mv -f $(@D)/.tmp_$(@F) $@;                              \
+                rm -f $(v_file);                                        \
+                $(CC) $(no_g_c_flags) -c -o $@ $(s_file);               \
         fi;
 endif
 
@@ -221,7 +231,12 @@ define rule_cc_o_c
         $(cmd_record_mcount)                                              \
         scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
                                                       $(dot-target).tmp;  \
-        rm -f $(depfile);                                                 \
+        if [ -r $(@D)/.tmp_$(@F:.o=.v) ]; then                            \
+                echo >> $(dot-target).tmp;                                \
+                echo '$@: $(GENKSYMS)' >> $(dot-target).tmp;              \
+                echo '$(GENKSYMS):: ;' >> $(dot-target).tmp;              \
+        fi;                                                               \
+        rm -f $(depfile) $(@D)/.tmp_$(@F:.o=.?);                          \
         mv -f $(dot-target).tmp $(dot-target).cmd
 endef
 
diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst
index efa5d940e632..a5122dce1264 100644
--- a/scripts/Makefile.modinst
+++ b/scripts/Makefile.modinst
@@ -17,7 +17,8 @@ __modinst: $(modules)
         @:
 
 quiet_cmd_modules_install = INSTALL $@
-      cmd_modules_install = mkdir -p $(2); cp $@ $(2) ; $(mod_strip_cmd) $(2)/$(notdir $@)
+      cmd_modules_install = mkdir -p $(2); \
+                            $(mod_strip_cmd) $@ $(2)/$(notdir $@) || cp $@ $(2)
 
 # Modules built outside the kernel source tree go into extra by default
 INSTALL_MOD_DIR ?= extra
diff --git a/scripts/genksyms/genksyms.c b/scripts/genksyms/genksyms.c
index 3a8297b5184c..f8bb4cabd62d 100644
--- a/scripts/genksyms/genksyms.c
+++ b/scripts/genksyms/genksyms.c
@@ -43,7 +43,7 @@ int cur_line = 1;
 char *cur_filename;
 
 static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types,
-           flag_preserve, flag_warnings;
+           flag_preserve, flag_warnings, flag_asm;
 static const char *arch = "";
 static const char *mod_prefix = "";
 
@@ -610,8 +610,11 @@ void export_symbol(const char *name)
                 if (flag_dump_defs)
                         fputs(">\n", debugfile);
 
-                /* Used as a linker script. */
-                printf("%s__crc_%s = 0x%08lx ;\n", mod_prefix, name, crc);
+                /* Used as assembly source or a linker script. */
+                printf(flag_asm
+                       ? ".equiv %s__crc_%s, %#08lx\n"
+                       : "%s__crc_%s = %#08lx ;\n",
+                       mod_prefix, name, crc);
         }
 }
 
@@ -648,9 +651,10 @@ void error_with_pos(const char *fmt, ...)
 
 static void genksyms_usage(void)
 {
-        fputs("Usage:\n" "genksyms [-adDTwqhV] > /path/to/.tmp_obj.ver\n" "\n"
+        fputs("Usage:\n" "genksyms [-aAdDTwqhV] > /path/to/.tmp_obj.ver\n" "\n"
 #ifdef __GNU_LIBRARY__
               "  -a, --arch            Select architecture\n"
+              "  -A, --asm             Generate assembly rather than linker script\n"
               "  -d, --debug           Increment the debug level (repeatable)\n"
               "  -D, --dump            Dump expanded symbol defs (for debugging only)\n"
               "  -r, --reference file  Read reference symbols from a file\n"
@@ -662,6 +666,7 @@ static void genksyms_usage(void)
               "  -V, --version         Print the release version\n"
 #else                           /* __GNU_LIBRARY__ */
               "  -a                    Select architecture\n"
+              "  -A                    Generate assembly rather than linker script\n"
               "  -d                    Increment the debug level (repeatable)\n"
               "  -D                    Dump expanded symbol defs (for debugging only)\n"
               "  -r file               Read reference symbols from a file\n"
@@ -683,6 +688,7 @@ int main(int argc, char **argv)
 #ifdef __GNU_LIBRARY__
         struct option long_opts[] = {
                 {"arch", 1, 0, 'a'},
+                {"asm", 0, 0, 'A'},
                 {"debug", 0, 0, 'd'},
                 {"warnings", 0, 0, 'w'},
                 {"quiet", 0, 0, 'q'},
@@ -695,10 +701,10 @@ int main(int argc, char **argv)
                 {0, 0, 0, 0}
         };
 
-        while ((o = getopt_long(argc, argv, "a:dwqVDr:T:ph",
+        while ((o = getopt_long(argc, argv, "a:dwqVADr:T:ph",
                                 &long_opts[0], NULL)) != EOF)
 #else                           /* __GNU_LIBRARY__ */
-        while ((o = getopt(argc, argv, "a:dwqVDr:T:ph")) != EOF)
+        while ((o = getopt(argc, argv, "a:dwqVADr:T:ph")) != EOF)
 #endif                          /* __GNU_LIBRARY__ */
                 switch (o) {
                 case 'a':
@@ -716,6 +722,9 @@ int main(int argc, char **argv)
                 case 'V':
                         fputs("genksyms version 2.5.60\n", stderr);
                         break;
+                case 'A':
+                        flag_asm = 1;
+                        break;
                 case 'D':
                         flag_dump_defs = 1;
                         break;
diff --git a/scripts/mksysmap b/scripts/mksysmap
index 6e133a0bae7a..1db316a3712b 100644
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -37,9 +37,6 @@
 
 # readprofile starts reading symbols when _stext is found, and
 # continue until it finds a symbol which is not either of 'T', 't',
-# 'W' or 'w'. __crc_ are 'A' and placed in the middle
-# so we just ignore them to let readprofile continue to work.
-# (At least sparc64 has __crc_ in the middle).
-
-$NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2
+# 'W' or 'w'.
 
+$NM -n $1 | grep -v '\( [aNUw] \)\|\( \$[adt]\)' > $2
diff --git a/scripts/strip-symbols b/scripts/strip-symbols
new file mode 100644
index 000000000000..29ee8c1a014b
--- /dev/null
+++ b/scripts/strip-symbols
@@ -0,0 +1,22 @@
+<*>
+*.h
+__compound_literal[$.][0-9]*
+__crc_[a-zA-Z_]*
+__exitcall_[a-zA-Z_]*
+__func__[$.][0-9]*
+__FUNCTION__[$.][0-9]*
+gcc[0-9]_compiled[$.]
+__initcall_[a-zA-Z_]*
+__kcrctab_[a-zA-Z_]*
+__kstrtab_[a-zA-Z_]*
+__ksymtab_[a-zA-Z_]*
+__mod_[a-zA-Z_]*[0-9]
+__module_depends
+__param_[a-zA-Z_]*
+__pci_fixup_*PCI_ANY_IDPCI_ANY_ID*
+__pci_fixup_*PCI_ANY_IDPCI_DEVICE_ID_*
+__pci_fixup_*PCI_VENDOR_ID_*PCI_ANY_ID*
+__pci_fixup_*PCI_VENDOR_ID_*PCI_DEVICE_ID_*
+__PRETTY_FUNCTION__[$.][0-9]*
+__setup_[a-zA-Z_]*
+____versions