[Darwin, PPC] Move the out of line register save/restore to an endfile.

We have been including this in libgcc, which means that we have to append
-lgcc even when using shared libgcc. In preparation for revision of libgcc
split this into an endfile.

gcc/
2019-06-25  Iain Sandoe  <iain@sandoe.co.uk>

	* config/rs6000/darwin.h (ENDFILE_SPEC): New.

libgcc/
2019-06-25  Iain Sandoe  <iain@sandoe.co.uk>

	* config.host: Add libef_ppc.a to the extra files for powerpc-darwin.
	* config/rs6000/t-darwin: (PPC_ENDFILE_SRC, PPC_ENDFILE_OBJS): New.
	Build objects for the out of line save/restore register functions
	so that they can be used for any supported Darwin version.
	* config/t-darwin: Default the build Darwin version to Darwin8
	(MacOS 10.4).

From-SVN: r272659

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7dfd12dc4268e81d0c6eae0779ef3176ae98a77b..9d8d109ca0fed0219e657e824ceb667683d6a394 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,4 +1,8 @@
-2019-06-24  Bill Seurer  <seurer@linux.vnet.ibm.com>
+2019-06-25  Iain Sandoe  <iain@sandoe.co.uk>
+
+       * config/rs6000/darwin.h (ENDFILE_SPEC): New.
+
+2019-06-25  Bill Seurer  <seurer@linux.vnet.ibm.com>
 
        * config/rs6000/rs6000.c (stack_info, rs6000_pic_labelno,
        savres_routine_syms, savres_routine_name, morestack_ref,

diff --git a/gcc/config/rs6000/darwin.h b/gcc/config/rs6000/darwin.h
index 705dd7fdd9455eda19e0b958a1bc47df21e32be4..fcc4354b2d0b65d2739bf613ab86b3ab7273d64c 100644 (file)
--- a/gcc/config/rs6000/darwin.h
+++ b/gcc/config/rs6000/darwin.h
@@ -132,6 +132,11 @@ extern int darwin_emit_picsym_stub;
 #define DARWIN_CRT2_SPEC \
   "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}"
 
+/* The PPC regs save/restore functions are leaves and could, conceivably
+   be used by the tm destructor.  */
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC TM_DESTRUCTOR "-lef_ppc"
+
 #undef SUBTARGET_EXTRA_SPECS
 #define SUBTARGET_EXTRA_SPECS                  \
   DARWIN_EXTRA_SPECS                            \

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index a5896155bb490e7ec7d58b76b8d8320e8df88f08..a6e8c202b9d612f51396435554bfbf91b5175fd6 100644 (file)
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,12 @@
+2019-06-25  Iain Sandoe  <iain@sandoe.co.uk>
+
+       * config.host: Add libef_ppc.a to the extra files for powerpc-darwin.
+       * config/rs6000/t-darwin: (PPC_ENDFILE_SRC, PPC_ENDFILE_OBJS): New.
+       Build objects for the out of line save/restore register functions
+       so that they can be used for any supported Darwin version.
+       * config/t-darwin: Default the build Darwin version to Darwin8
+       (MacOS 10.4).
+
 2019-06-25  Martin Liska  <mliska@suse.cz>
 
        * libgcov-driver-system.c (replace_filename_variables): Do not

diff --git a/libgcc/config/rs6000/t-darwin b/libgcc/config/rs6000/t-darwin
index 61da0bdf13a700f7ebf130fc23f97e310a1cd12d..0c238b7a7e83c3c8291295e2139e6ea203f036e4 100644 (file)
--- a/libgcc/config/rs6000/t-darwin
+++ b/libgcc/config/rs6000/t-darwin
@@ -3,23 +3,49 @@ DARWIN_EXTRA_CRT_BUILD_CFLAGS = -mlongcall -mmacosx-version-min=10.4
 crt2.o: $(srcdir)/config/rs6000/darwin-crt2.c
        $(crt_compile) $(DARWIN_EXTRA_CRT_BUILD_CFLAGS) -c $<
 
+# The outlined register save/restore functions need to run anywhere, and
+# they must be leaf functions suitable for use in an endfile.
+
+PPC_ENDFILE_SRC = \
+  $(srcdir)/config/rs6000/darwin-gpsave.S \
+  $(srcdir)/config/rs6000/darwin-fpsave.S \
+  $(srcdir)/config/rs6000/darwin-vecsave.S
+
+PPC_ENDFILE_OBJS = \
+ darwin-gpsave.o \
+ darwin-fpsave.o \
+ darwin-vecsave.o
+
+darwin-gpsave.o: $(srcdir)/config/rs6000/darwin-gpsave.S
+       $(crt_compile) -mmacosx-version-min=10.1 -c $<
+
+darwin-fpsave.o: $(srcdir)/config/rs6000/darwin-fpsave.S
+       $(crt_compile) -mmacosx-version-min=10.1 -c $<
+
+darwin-vecsave.o: $(srcdir)/config/rs6000/darwin-vecsave.S
+       $(crt_compile) -mmacosx-version-min=10.1 -c $<
+
+# We build these into a library, so that they are only linked as needed and not
+# forced into every object.
+
+libef_ppc.a: $(PPC_ENDFILE_OBJS)
+       $(AR_CREATE_FOR_TARGET) $@ $(PPC_ENDFILE_OBJS)
+       $(RANLIB_FOR_TARGET) $@
+
 LIB2ADD = $(srcdir)/config/rs6000/darwin-tramp.S \
          $(srcdir)/config/darwin-64.c \
-         $(srcdir)/config/rs6000/darwin-fpsave.S  \
-         $(srcdir)/config/rs6000/darwin-gpsave.S  \
          $(srcdir)/config/rs6000/darwin-world.S \
          $(srcdir)/config/rs6000/ppc64-fp.c
 
-LIB2ADD_ST = \
-         $(srcdir)/config/rs6000/darwin-vecsave.S
-
 # The .S files above are designed to run on all processors, even though
 # they use AltiVec instructions.
 # -Wa is used because -force_cpusubtype_ALL doesn't work with -dynamiclib.
-# -mmacosx-version-min=10.4 is used to provide compatibility for code from
-# earlier OSX versions.
-HOST_LIBGCC2_CFLAGS += -Wa,-force_cpusubtype_ALL -mmacosx-version-min=10.4
 
+HOST_LIBGCC2_CFLAGS += -Wa,-force_cpusubtype_ALL
+
+# Although the default for 10.4 is G3, we need the unwinder to be built
+# with vector support so that the "save/rest_world" outlined functions are
+# correctly invoked.
 unwind-dw2_s.o: HOST_LIBGCC2_CFLAGS += -maltivec
 unwind-dw2.o: HOST_LIBGCC2_CFLAGS += -maltivec
 

diff --git a/libgcc/config/t-darwin b/libgcc/config/t-darwin
index 8340ea2bfe4b894a9a00e5885ef851cbe842fba1..2fcb712a060248cd218d2510367f8f73e2fb6872 100644 (file)
--- a/libgcc/config/t-darwin
+++ b/libgcc/config/t-darwin
@@ -1,6 +1,6 @@
 # Set this as a minimum (unless overriden by arch t-files) since it's a
 # reasonable lowest common denominator that works for all our archs.
-HOST_LIBGCC2_CFLAGS += -mmacosx-version-min=10.5
+HOST_LIBGCC2_CFLAGS += -mmacosx-version-min=10.4
 
 crt3.o: $(srcdir)/config/darwin-crt3.c
        $(crt_compile) $(DARWIN_EXTRA_CRT_BUILD_CFLAGS) -c $<