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

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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
This commit is contained in:
Iain Sandoe 2019-06-25 20:11:11 +00:00
parent 2c04f8476a
commit a8e55c61f8
5 changed files with 54 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
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@ -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,

5
gcc/config/rs6000/darwin.h
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@ -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 \

9
libgcc/ChangeLog
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@ -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

42
libgcc/config/rs6000/t-darwin
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@ -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

2
libgcc/config/t-darwin
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@ -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 $<