Backport of RISC-V support for libffi
* configure.host: Add RISC-V support. * Makefile.am: Likewise. * Makefile.in: Regenerate. * src/riscv/ffi.c, src/riscv/ffitarget.h, src/riscv/sysv.S: New files. From-SVN: r260033
This commit is contained in:
Andreas Schwab
Andreas Schwab
parent
0513e3d517
commit
93249dde86
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@ -1,3 +1,12 @@
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2018-05-08 Andreas Schwab <schwab@suse.de>
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Backport of RISC-V support for libffi
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* configure.host: Add RISC-V support.
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* Makefile.am: Likewise.
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* Makefile.in: Regenerate.
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* src/riscv/ffi.c, src/riscv/ffitarget.h, src/riscv/sysv.S: New
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files.
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2018-05-04 Alan Modra <amodra@gmail.com>
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Import from upstream
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@ -138,6 +138,7 @@ noinst_HEADERS = \
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src/or1k/ffitarget.h \
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src/pa/ffitarget.h \
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src/powerpc/ffitarget.h src/powerpc/asm.h src/powerpc/ffi_powerpc.h \
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src/riscv/ffitarget.h \
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src/s390/ffitarget.h \
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src/sh/ffitarget.h \
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src/sh64/ffitarget.h \
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@ -173,6 +174,7 @@ EXTRA_libffi_la_SOURCES = \
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src/powerpc/linux64_closure.S src/powerpc/ppc_closure.S \
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src/powerpc/aix.S src/powerpc/darwin.S src/powerpc/aix_closure.S \
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src/powerpc/darwin_closure.S src/powerpc/ffi_darwin.c \
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src/riscv/ffi.c src/riscv/sysv.S \
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src/s390/ffi.c src/s390/sysv.S \
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src/sh/ffi.c src/sh/sysv.S \
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src/sh64/ffi.c src/sh64/sysv.S \
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@ -432,6 +432,7 @@ noinst_HEADERS = \
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src/or1k/ffitarget.h \
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src/pa/ffitarget.h \
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src/powerpc/ffitarget.h src/powerpc/asm.h src/powerpc/ffi_powerpc.h \
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src/riscv/ffitarget.h \
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src/s390/ffitarget.h \
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src/sh/ffitarget.h \
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src/sh64/ffitarget.h \
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@ -467,6 +468,7 @@ EXTRA_libffi_la_SOURCES = \
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src/powerpc/linux64_closure.S src/powerpc/ppc_closure.S \
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src/powerpc/aix.S src/powerpc/darwin.S src/powerpc/aix_closure.S \
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src/powerpc/darwin_closure.S src/powerpc/ffi_darwin.c \
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src/riscv/ffi.c src/riscv/sysv.S \
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src/s390/ffi.c src/s390/sysv.S \
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src/sh/ffi.c src/sh/sysv.S \
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src/sh64/ffi.c src/sh64/sysv.S \
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@ -831,6 +833,16 @@ src/powerpc/darwin_closure.lo: src/powerpc/$(am__dirstamp) \
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src/powerpc/$(DEPDIR)/$(am__dirstamp)
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src/powerpc/ffi_darwin.lo: src/powerpc/$(am__dirstamp) \
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src/powerpc/$(DEPDIR)/$(am__dirstamp)
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src/riscv/$(am__dirstamp):
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@$(MKDIR_P) src/riscv
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@: > src/riscv/$(am__dirstamp)
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src/riscv/$(DEPDIR)/$(am__dirstamp):
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@$(MKDIR_P) src/riscv/$(DEPDIR)
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@: > src/riscv/$(DEPDIR)/$(am__dirstamp)
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src/riscv/ffi.lo: src/riscv/$(am__dirstamp) \
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src/riscv/$(DEPDIR)/$(am__dirstamp)
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src/riscv/sysv.lo: src/riscv/$(am__dirstamp) \
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src/riscv/$(DEPDIR)/$(am__dirstamp)
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src/s390/$(am__dirstamp):
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@$(MKDIR_P) src/s390
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@: > src/s390/$(am__dirstamp)
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@ -1051,6 +1063,10 @@ mostlyclean-compile:
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-rm -f src/prep_cif.lo
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-rm -f src/raw_api.$(OBJEXT)
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-rm -f src/raw_api.lo
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-rm -f src/riscv/ffi.$(OBJEXT)
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-rm -f src/riscv/ffi.lo
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-rm -f src/riscv/sysv.$(OBJEXT)
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-rm -f src/riscv/sysv.lo
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-rm -f src/s390/ffi.$(OBJEXT)
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-rm -f src/s390/ffi.lo
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-rm -f src/s390/sysv.$(OBJEXT)
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@ -1167,6 +1183,8 @@ distclean-compile:
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@AMDEP_TRUE@@am__include@ @am__quote@src/powerpc/$(DEPDIR)/linux64_closure.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@src/powerpc/$(DEPDIR)/ppc_closure.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@src/powerpc/$(DEPDIR)/sysv.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@src/riscv/$(DEPDIR)/ffi.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@src/riscv/$(DEPDIR)/sysv.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@src/s390/$(DEPDIR)/ffi.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@src/s390/$(DEPDIR)/sysv.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@src/sh/$(DEPDIR)/ffi.Plo@am__quote@
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@ -1268,6 +1286,7 @@ clean-libtool:
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-rm -rf src/or1k/.libs src/or1k/_libs
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-rm -rf src/pa/.libs src/pa/_libs
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-rm -rf src/powerpc/.libs src/powerpc/_libs
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-rm -rf src/riscv/.libs src/riscv/_libs
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-rm -rf src/s390/.libs src/s390/_libs
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-rm -rf src/sh/.libs src/sh/_libs
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-rm -rf src/sh64/.libs src/sh64/_libs
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@ -1672,6 +1691,8 @@ distclean-generic:
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-rm -f src/pa/$(am__dirstamp)
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-rm -f src/powerpc/$(DEPDIR)/$(am__dirstamp)
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-rm -f src/powerpc/$(am__dirstamp)
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-rm -f src/riscv/$(DEPDIR)/$(am__dirstamp)
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-rm -f src/riscv/$(am__dirstamp)
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-rm -f src/s390/$(DEPDIR)/$(am__dirstamp)
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-rm -f src/s390/$(am__dirstamp)
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-rm -f src/sh/$(DEPDIR)/$(am__dirstamp)
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@ -1701,7 +1722,7 @@ clean-am: clean-aminfo clean-generic clean-libtool \
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distclean: distclean-multi distclean-recursive
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-rm -f $(am__CONFIG_DISTCLEAN_FILES)
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-rm -rf src/$(DEPDIR) src/aarch64/$(DEPDIR) src/alpha/$(DEPDIR) src/arc/$(DEPDIR) src/arm/$(DEPDIR) src/avr32/$(DEPDIR) src/bfin/$(DEPDIR) src/cris/$(DEPDIR) src/frv/$(DEPDIR) src/ia64/$(DEPDIR) src/m32r/$(DEPDIR) src/m68k/$(DEPDIR) src/m88k/$(DEPDIR) src/metag/$(DEPDIR) src/microblaze/$(DEPDIR) src/mips/$(DEPDIR) src/moxie/$(DEPDIR) src/nios2/$(DEPDIR) src/or1k/$(DEPDIR) src/pa/$(DEPDIR) src/powerpc/$(DEPDIR) src/s390/$(DEPDIR) src/sh/$(DEPDIR) src/sh64/$(DEPDIR) src/sparc/$(DEPDIR) src/tile/$(DEPDIR) src/vax/$(DEPDIR) src/x86/$(DEPDIR) src/xtensa/$(DEPDIR)
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-rm -rf src/$(DEPDIR) src/aarch64/$(DEPDIR) src/alpha/$(DEPDIR) src/arc/$(DEPDIR) src/arm/$(DEPDIR) src/avr32/$(DEPDIR) src/bfin/$(DEPDIR) src/cris/$(DEPDIR) src/frv/$(DEPDIR) src/ia64/$(DEPDIR) src/m32r/$(DEPDIR) src/m68k/$(DEPDIR) src/m88k/$(DEPDIR) src/metag/$(DEPDIR) src/microblaze/$(DEPDIR) src/mips/$(DEPDIR) src/moxie/$(DEPDIR) src/nios2/$(DEPDIR) src/or1k/$(DEPDIR) src/pa/$(DEPDIR) src/powerpc/$(DEPDIR) src/riscv/$(DEPDIR) src/s390/$(DEPDIR) src/sh/$(DEPDIR) src/sh64/$(DEPDIR) src/sparc/$(DEPDIR) src/tile/$(DEPDIR) src/vax/$(DEPDIR) src/x86/$(DEPDIR) src/xtensa/$(DEPDIR)
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-rm -f Makefile
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distclean-am: clean-am distclean-compile distclean-generic \
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distclean-hdr distclean-libtool distclean-tags
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@ -1840,7 +1861,7 @@ installcheck-am:
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maintainer-clean: maintainer-clean-multi maintainer-clean-recursive
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-rm -f $(am__CONFIG_DISTCLEAN_FILES)
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-rm -rf $(top_srcdir)/autom4te.cache
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-rm -rf src/$(DEPDIR) src/aarch64/$(DEPDIR) src/alpha/$(DEPDIR) src/arc/$(DEPDIR) src/arm/$(DEPDIR) src/avr32/$(DEPDIR) src/bfin/$(DEPDIR) src/cris/$(DEPDIR) src/frv/$(DEPDIR) src/ia64/$(DEPDIR) src/m32r/$(DEPDIR) src/m68k/$(DEPDIR) src/m88k/$(DEPDIR) src/metag/$(DEPDIR) src/microblaze/$(DEPDIR) src/mips/$(DEPDIR) src/moxie/$(DEPDIR) src/nios2/$(DEPDIR) src/or1k/$(DEPDIR) src/pa/$(DEPDIR) src/powerpc/$(DEPDIR) src/s390/$(DEPDIR) src/sh/$(DEPDIR) src/sh64/$(DEPDIR) src/sparc/$(DEPDIR) src/tile/$(DEPDIR) src/vax/$(DEPDIR) src/x86/$(DEPDIR) src/xtensa/$(DEPDIR)
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-rm -rf src/$(DEPDIR) src/aarch64/$(DEPDIR) src/alpha/$(DEPDIR) src/arc/$(DEPDIR) src/arm/$(DEPDIR) src/avr32/$(DEPDIR) src/bfin/$(DEPDIR) src/cris/$(DEPDIR) src/frv/$(DEPDIR) src/ia64/$(DEPDIR) src/m32r/$(DEPDIR) src/m68k/$(DEPDIR) src/m88k/$(DEPDIR) src/metag/$(DEPDIR) src/microblaze/$(DEPDIR) src/mips/$(DEPDIR) src/moxie/$(DEPDIR) src/nios2/$(DEPDIR) src/or1k/$(DEPDIR) src/pa/$(DEPDIR) src/powerpc/$(DEPDIR) src/riscv/$(DEPDIR) src/s390/$(DEPDIR) src/sh/$(DEPDIR) src/sh64/$(DEPDIR) src/sparc/$(DEPDIR) src/tile/$(DEPDIR) src/vax/$(DEPDIR) src/x86/$(DEPDIR) src/xtensa/$(DEPDIR)
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-rm -f Makefile
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maintainer-clean-am: distclean-am maintainer-clean-aminfo \
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maintainer-clean-generic maintainer-clean-vti
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@ -195,6 +195,11 @@ case "${host}" in
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TARGET=POWERPC; TARGETDIR=powerpc
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;;
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riscv*-*)
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TARGET=RISCV; TARGETDIR=riscv
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SOURCES="ffi.c sysv.S"
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;;
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s390-*-* | s390x-*-*)
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TARGET=S390; TARGETDIR=s390
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SOURCES="ffi.c sysv.S"
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@ -0,0 +1,445 @@
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/* -----------------------------------------------------------------------
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ffi.c - Copyright (c) 2015 Michael Knyszek <mknyszek@berkeley.edu>
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2015 Andrew Waterman <waterman@cs.berkeley.edu>
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2018 Stef O'Rear <sorear2@gmail.com>
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Based on MIPS N32/64 port
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RISC-V Foreign Function Interface
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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``Software''), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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----------------------------------------------------------------------- */
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#include <ffi.h>
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#include <ffi_common.h>
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#include <stdlib.h>
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#include <stdint.h>
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#if __riscv_float_abi_double
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#define ABI_FLEN 64
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#define ABI_FLOAT double
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#elif __riscv_float_abi_single
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#define ABI_FLEN 32
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#define ABI_FLOAT float
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#endif
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#define NARGREG 8
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#define STKALIGN 16
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#define MAXCOPYARG (2 * sizeof(double))
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typedef struct call_context
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{
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#if ABI_FLEN
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ABI_FLOAT fa[8];
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#endif
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size_t a[8];
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/* used by the assembly code to in-place construct its own stack frame */
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char frame[16];
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} call_context;
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typedef struct call_builder
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{
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call_context *aregs;
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int used_integer;
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int used_float;
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size_t *used_stack;
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} call_builder;
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/* integer (not pointer) less than ABI XLEN */
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/* FFI_TYPE_INT does not appear to be used */
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#if __SIZEOF_POINTER__ == 8
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#define IS_INT(type) ((type) >= FFI_TYPE_UINT8 && (type) <= FFI_TYPE_SINT64)
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#else
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#define IS_INT(type) ((type) >= FFI_TYPE_UINT8 && (type) <= FFI_TYPE_SINT32)
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#endif
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#if ABI_FLEN
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typedef struct {
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char as_elements, type1, offset2, type2;
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} float_struct_info;
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#if ABI_FLEN >= 64
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#define IS_FLOAT(type) ((type) >= FFI_TYPE_FLOAT && (type) <= FFI_TYPE_DOUBLE)
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#else
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#define IS_FLOAT(type) ((type) == FFI_TYPE_FLOAT)
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#endif
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static ffi_type **flatten_struct(ffi_type *in, ffi_type **out, ffi_type **out_end) {
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int i;
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if (out == out_end) return out;
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if (in->type != FFI_TYPE_STRUCT) {
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*(out++) = in;
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} else {
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for (i = 0; in->elements[i]; i++)
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out = flatten_struct(in->elements[i], out, out_end);
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}
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return out;
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}
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/* Structs with at most two fields after flattening, one of which is of
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floating point type, are passed in multiple registers if sufficient
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registers are available. */
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static float_struct_info struct_passed_as_elements(call_builder *cb, ffi_type *top) {
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float_struct_info ret = {0, 0, 0, 0};
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ffi_type *fields[3];
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int num_floats, num_ints;
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int num_fields = flatten_struct(top, fields, fields + 3) - fields;
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if (num_fields == 1) {
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if (IS_FLOAT(fields[0]->type)) {
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ret.as_elements = 1;
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ret.type1 = fields[0]->type;
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}
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} else if (num_fields == 2) {
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num_floats = IS_FLOAT(fields[0]->type) + IS_FLOAT(fields[1]->type);
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num_ints = IS_INT(fields[0]->type) + IS_INT(fields[1]->type);
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if (num_floats == 0 || num_floats + num_ints != 2)
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return ret;
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if (cb->used_float + num_floats > NARGREG || cb->used_integer + (2 - num_floats) > NARGREG)
|
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return ret;
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if (!IS_FLOAT(fields[0]->type) && !IS_FLOAT(fields[1]->type))
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return ret;
|
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|
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ret.type1 = fields[0]->type;
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ret.type2 = fields[1]->type;
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ret.offset2 = ALIGN(fields[0]->size, fields[1]->alignment);
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ret.as_elements = 1;
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}
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return ret;
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}
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#endif
|
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|
||||
/* allocates a single register, float register, or XLEN-sized stack slot to a datum */
|
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static void marshal_atom(call_builder *cb, int type, void *data) {
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size_t value = 0;
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switch (type) {
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case FFI_TYPE_UINT8: value = *(uint8_t *)data; break;
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||||
case FFI_TYPE_SINT8: value = *(int8_t *)data; break;
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case FFI_TYPE_UINT16: value = *(uint16_t *)data; break;
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case FFI_TYPE_SINT16: value = *(int16_t *)data; break;
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/* 32-bit quantities are always sign-extended in the ABI */
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||||
case FFI_TYPE_UINT32: value = *(int32_t *)data; break;
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||||
case FFI_TYPE_SINT32: value = *(int32_t *)data; break;
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||||
#if __SIZEOF_POINTER__ == 8
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case FFI_TYPE_UINT64: value = *(uint64_t *)data; break;
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case FFI_TYPE_SINT64: value = *(int64_t *)data; break;
|
||||
#endif
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case FFI_TYPE_POINTER: value = *(size_t *)data; break;
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||||
|
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/* float values may be recoded in an implementation-defined way
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||||
by hardware conforming to 2.1 or earlier, so use asm to
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reinterpret floats as doubles */
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||||
#if ABI_FLEN >= 32
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case FFI_TYPE_FLOAT:
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||||
asm("" : "=f"(cb->aregs->fa[cb->used_float++]) : "0"(*(float *)data));
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||||
return;
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#endif
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#if ABI_FLEN >= 64
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case FFI_TYPE_DOUBLE:
|
||||
asm("" : "=f"(cb->aregs->fa[cb->used_float++]) : "0"(*(double *)data));
|
||||
return;
|
||||
#endif
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default: FFI_ASSERT(0); break;
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||||
}
|
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|
||||
if (cb->used_integer == NARGREG) {
|
||||
*cb->used_stack++ = value;
|
||||
} else {
|
||||
cb->aregs->a[cb->used_integer++] = value;
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||||
}
|
||||
}
|
||||
|
||||
static void unmarshal_atom(call_builder *cb, int type, void *data) {
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size_t value;
|
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switch (type) {
|
||||
#if ABI_FLEN >= 32
|
||||
case FFI_TYPE_FLOAT:
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||||
asm("" : "=f"(*(float *)data) : "0"(cb->aregs->fa[cb->used_float++]));
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return;
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#endif
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||||
#if ABI_FLEN >= 64
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case FFI_TYPE_DOUBLE:
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asm("" : "=f"(*(double *)data) : "0"(cb->aregs->fa[cb->used_float++]));
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return;
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#endif
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}
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|
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if (cb->used_integer == NARGREG) {
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value = *cb->used_stack++;
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} else {
|
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value = cb->aregs->a[cb->used_integer++];
|
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}
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||||
|
||||
switch (type) {
|
||||
case FFI_TYPE_UINT8: *(uint8_t *)data = value; break;
|
||||
case FFI_TYPE_SINT8: *(uint8_t *)data = value; break;
|
||||
case FFI_TYPE_UINT16: *(uint16_t *)data = value; break;
|
||||
case FFI_TYPE_SINT16: *(uint16_t *)data = value; break;
|
||||
case FFI_TYPE_UINT32: *(uint32_t *)data = value; break;
|
||||
case FFI_TYPE_SINT32: *(uint32_t *)data = value; break;
|
||||
#if __SIZEOF_POINTER__ == 8
|
||||
case FFI_TYPE_UINT64: *(uint64_t *)data = value; break;
|
||||
case FFI_TYPE_SINT64: *(uint64_t *)data = value; break;
|
||||
#endif
|
||||
case FFI_TYPE_POINTER: *(size_t *)data = value; break;
|
||||
default: FFI_ASSERT(0); break;
|
||||
}
|
||||
}
|
||||
|
||||
/* adds an argument to a call, or a not by reference return value */
|
||||
static void marshal(call_builder *cb, ffi_type *type, int var, void *data) {
|
||||
size_t realign[2];
|
||||
|
||||
#if ABI_FLEN
|
||||
if (!var && type->type == FFI_TYPE_STRUCT) {
|
||||
float_struct_info fsi = struct_passed_as_elements(cb, type);
|
||||
if (fsi.as_elements) {
|
||||
marshal_atom(cb, fsi.type1, data);
|
||||
if (fsi.offset2)
|
||||
marshal_atom(cb, fsi.type2, ((char*)data) + fsi.offset2);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
if (!var && cb->used_float < NARGREG && IS_FLOAT(type->type)) {
|
||||
marshal_atom(cb, type->type, data);
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (type->size > 2 * __SIZEOF_POINTER__) {
|
||||
/* pass by reference */
|
||||
marshal_atom(cb, FFI_TYPE_POINTER, &data);
|
||||
} else if (IS_INT(type->type) || type->type == FFI_TYPE_POINTER) {
|
||||
marshal_atom(cb, type->type, data);
|
||||
} else {
|
||||
/* overlong integers, soft-float floats, and structs without special
|
||||
float handling are treated identically from this point on */
|
||||
|
||||
/* variadics are aligned even in registers */
|
||||
if (type->alignment > __SIZEOF_POINTER__) {
|
||||
if (var)
|
||||
cb->used_integer = ALIGN(cb->used_integer, 2);
|
||||
cb->used_stack = (size_t *)ALIGN(cb->used_stack, 2*__SIZEOF_POINTER__);
|
||||
}
|
||||
|
||||
memcpy(realign, data, type->size);
|
||||
if (type->size > 0)
|
||||
marshal_atom(cb, FFI_TYPE_POINTER, realign);
|
||||
if (type->size > __SIZEOF_POINTER__)
|
||||
marshal_atom(cb, FFI_TYPE_POINTER, realign + 1);
|
||||
}
|
||||
}
|
||||
|
||||
/* for arguments passed by reference returns the pointer, otherwise the arg is copied (up to MAXCOPYARG bytes) */
|
||||
static void *unmarshal(call_builder *cb, ffi_type *type, int var, void *data) {
|
||||
size_t realign[2];
|
||||
void *pointer;
|
||||
|
||||
#if ABI_FLEN
|
||||
if (!var && type->type == FFI_TYPE_STRUCT) {
|
||||
float_struct_info fsi = struct_passed_as_elements(cb, type);
|
||||
if (fsi.as_elements) {
|
||||
unmarshal_atom(cb, fsi.type1, data);
|
||||
if (fsi.offset2)
|
||||
unmarshal_atom(cb, fsi.type2, ((char*)data) + fsi.offset2);
|
||||
return data;
|
||||
}
|
||||
}
|
||||
|
||||
if (!var && cb->used_float < NARGREG && IS_FLOAT(type->type)) {
|
||||
unmarshal_atom(cb, type->type, data);
|
||||
return data;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (type->size > 2 * __SIZEOF_POINTER__) {
|
||||
/* pass by reference */
|
||||
unmarshal_atom(cb, FFI_TYPE_POINTER, (char*)&pointer);
|
||||
return pointer;
|
||||
} else if (IS_INT(type->type) || type->type == FFI_TYPE_POINTER) {
|
||||
unmarshal_atom(cb, type->type, data);
|
||||
return data;
|
||||
} else {
|
||||
/* overlong integers, soft-float floats, and structs without special
|
||||
float handling are treated identically from this point on */
|
||||
|
||||
/* variadics are aligned even in registers */
|
||||
if (type->alignment > __SIZEOF_POINTER__) {
|
||||
if (var)
|
||||
cb->used_integer = ALIGN(cb->used_integer, 2);
|
||||
cb->used_stack = (size_t *)ALIGN(cb->used_stack, 2*__SIZEOF_POINTER__);
|
||||
}
|
||||
|
||||
if (type->size > 0)
|
||||
unmarshal_atom(cb, FFI_TYPE_POINTER, realign);
|
||||
if (type->size > __SIZEOF_POINTER__)
|
||||
unmarshal_atom(cb, FFI_TYPE_POINTER, realign + 1);
|
||||
memcpy(data, realign, type->size);
|
||||
return data;
|
||||
}
|
||||
}
|
||||
|
||||
static int passed_by_ref(call_builder *cb, ffi_type *type, int var) {
|
||||
#if ABI_FLEN
|
||||
if (!var && type->type == FFI_TYPE_STRUCT) {
|
||||
float_struct_info fsi = struct_passed_as_elements(cb, type);
|
||||
if (fsi.as_elements) return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
return type->size > 2 * __SIZEOF_POINTER__;
|
||||
}
|
||||
|
||||
/* Perform machine dependent cif processing */
|
||||
ffi_status ffi_prep_cif_machdep(ffi_cif *cif) {
|
||||
cif->riscv_nfixedargs = cif->nargs;
|
||||
return FFI_OK;
|
||||
}
|
||||
|
||||
/* Perform machine dependent cif processing when we have a variadic function */
|
||||
|
||||
ffi_status ffi_prep_cif_machdep_var(ffi_cif *cif, unsigned int nfixedargs, unsigned int ntotalargs) {
|
||||
cif->riscv_nfixedargs = nfixedargs;
|
||||
return FFI_OK;
|
||||
}
|
||||
|
||||
/* Low level routine for calling functions */
|
||||
extern void ffi_call_asm(void *stack, struct call_context *regs, void (*fn)(void)) FFI_HIDDEN;
|
||||
|
||||
void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
|
||||
{
|
||||
/* this is a conservative estimate, assuming a complex return value and
|
||||
that all remaining arguments are long long / __int128 */
|
||||
size_t arg_bytes = cif->nargs <= 3 ? 0 :
|
||||
ALIGN(2 * sizeof(size_t) * (cif->nargs - 3), STKALIGN);
|
||||
size_t rval_bytes = 0;
|
||||
if (rvalue == NULL && cif->rtype->size > 2*__SIZEOF_POINTER__)
|
||||
rval_bytes = ALIGN(cif->rtype->size, STKALIGN);
|
||||
size_t alloc_size = arg_bytes + rval_bytes + sizeof(call_context);
|
||||
|
||||
/* the assembly code will deallocate all stack data at lower addresses
|
||||
than the argument region, so we need to allocate the frame and the
|
||||
return value after the arguments in a single allocation */
|
||||
size_t alloc_base;
|
||||
/* Argument region must be 16-byte aligned */
|
||||
if (_Alignof(max_align_t) >= STKALIGN) {
|
||||
/* since sizeof long double is normally 16, the compiler will
|
||||
guarantee alloca alignment to at least that much */
|
||||
alloc_base = (size_t)alloca(alloc_size);
|
||||
} else {
|
||||
alloc_base = ALIGN(alloca(alloc_size + STKALIGN - 1), STKALIGN);
|
||||
}
|
||||
|
||||
if (rval_bytes)
|
||||
rvalue = (void*)(alloc_base + arg_bytes);
|
||||
|
||||
call_builder cb;
|
||||
cb.used_float = cb.used_integer = 0;
|
||||
cb.aregs = (call_context*)(alloc_base + arg_bytes + rval_bytes);
|
||||
cb.used_stack = (void*)alloc_base;
|
||||
|
||||
int return_by_ref = passed_by_ref(&cb, cif->rtype, 0);
|
||||
if (return_by_ref)
|
||||
marshal(&cb, &ffi_type_pointer, 0, &rvalue);
|
||||
|
||||
int i;
|
||||
for (i = 0; i < cif->nargs; i++)
|
||||
marshal(&cb, cif->arg_types[i], i >= cif->riscv_nfixedargs, avalue[i]);
|
||||
|
||||
ffi_call_asm((void*)alloc_base, cb.aregs, fn);
|
||||
|
||||
cb.used_float = cb.used_integer = 0;
|
||||
if (!return_by_ref && rvalue)
|
||||
unmarshal(&cb, cif->rtype, 0, rvalue);
|
||||
}
|
||||
|
||||
extern void ffi_closure_asm(void) FFI_HIDDEN;
|
||||
|
||||
ffi_status ffi_prep_closure_loc(ffi_closure *closure, ffi_cif *cif, void (*fun)(ffi_cif*,void*,void**,void*), void *user_data, void *codeloc)
|
||||
{
|
||||
uint32_t *tramp = (uint32_t *) &closure->tramp[0];
|
||||
uint64_t fn = (uint64_t) (uintptr_t) ffi_closure_asm;
|
||||
|
||||
if (cif->abi <= FFI_FIRST_ABI || cif->abi >= FFI_LAST_ABI)
|
||||
return FFI_BAD_ABI;
|
||||
|
||||
/* we will call ffi_closure_inner with codeloc, not closure, but as long
|
||||
as the memory is readable it should work */
|
||||
|
||||
tramp[0] = 0x00000317; /* auipc t1, 0 (i.e. t0 <- codeloc) */
|
||||
#if __SIZEOF_POINTER__ == 8
|
||||
tramp[1] = 0x01033383; /* ld t2, 16(t1) */
|
||||
#else
|
||||
tramp[1] = 0x01032383; /* lw t2, 16(t1) */
|
||||
#endif
|
||||
tramp[2] = 0x00038067; /* jr t2 */
|
||||
tramp[3] = 0x00000013; /* nop */
|
||||
tramp[4] = fn;
|
||||
tramp[5] = fn >> 32;
|
||||
|
||||
closure->cif = cif;
|
||||
closure->fun = fun;
|
||||
closure->user_data = user_data;
|
||||
|
||||
__builtin___clear_cache(codeloc, codeloc + FFI_TRAMPOLINE_SIZE);
|
||||
|
||||
return FFI_OK;
|
||||
}
|
||||
|
||||
/* Called by the assembly code with aregs pointing to saved argument registers
|
||||
and stack pointing to the stacked arguments. Return values passed in
|
||||
registers will be reloaded from aregs. */
|
||||
void FFI_HIDDEN ffi_closure_inner(size_t *stack, call_context *aregs, ffi_closure *closure) {
|
||||
ffi_cif *cif = closure->cif;
|
||||
void **avalue = alloca(cif->nargs * sizeof(void*));
|
||||
/* storage for arguments which will be copied by unmarshal(). We could
|
||||
theoretically avoid the copies in many cases and use at most 128 bytes
|
||||
of memory, but allocating disjoint storage for each argument is
|
||||
simpler. */
|
||||
char *astorage = alloca(cif->nargs * MAXCOPYARG);
|
||||
void *rvalue;
|
||||
call_builder cb;
|
||||
int return_by_ref;
|
||||
int i;
|
||||
|
||||
cb.aregs = aregs;
|
||||
cb.used_integer = cb.used_float = 0;
|
||||
cb.used_stack = stack;
|
||||
|
||||
return_by_ref = passed_by_ref(&cb, cif->rtype, 0);
|
||||
if (return_by_ref)
|
||||
unmarshal(&cb, &ffi_type_pointer, 0, &rvalue);
|
||||
else
|
||||
rvalue = alloca(cif->rtype->size);
|
||||
|
||||
for (i = 0; i < cif->nargs; i++)
|
||||
avalue[i] = unmarshal(&cb, cif->arg_types[i],
|
||||
i >= cif->riscv_nfixedargs, astorage + i*MAXCOPYARG);
|
||||
|
||||
(closure->fun)(cif, rvalue, avalue, closure->user_data);
|
||||
|
||||
if (!return_by_ref && cif->rtype->type != FFI_TYPE_VOID) {
|
||||
cb.used_integer = cb.used_float = 0;
|
||||
marshal(&cb, cif->rtype, 0, rvalue);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,68 @@
|
|||
/* -----------------------------------------------------------------*-C-*-
|
||||
ffitarget.h - 2014 Michael Knyszek
|
||||
|
||||
Target configuration macros for RISC-V.
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining
|
||||
a copy of this software and associated documentation files (the
|
||||
``Software''), to deal in the Software without restriction, including
|
||||
without limitation the rights to use, copy, modify, merge, publish,
|
||||
distribute, sublicense, and/or sell copies of the Software, and to
|
||||
permit persons to whom the Software is furnished to do so, subject to
|
||||
the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included
|
||||
in all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
|
||||
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
||||
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
||||
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
DEALINGS IN THE SOFTWARE.
|
||||
|
||||
----------------------------------------------------------------------- */
|
||||
|
||||
#ifndef LIBFFI_TARGET_H
|
||||
#define LIBFFI_TARGET_H
|
||||
|
||||
#ifndef LIBFFI_H
|
||||
#error "Please do not include ffitarget.h directly into your source. Use ffi.h instead."
|
||||
#endif
|
||||
|
||||
#ifndef __riscv
|
||||
#error "libffi was configured for a RISC-V target but this does not appear to be a RISC-V compiler."
|
||||
#endif
|
||||
|
||||
#ifndef LIBFFI_ASM
|
||||
|
||||
typedef unsigned long ffi_arg;
|
||||
typedef signed long ffi_sarg;
|
||||
|
||||
/* FFI_UNUSED_NN and riscv_unused are to maintain ABI compatibility with a
|
||||
distributed Berkeley patch from 2014, and can be removed at SONAME bump */
|
||||
typedef enum ffi_abi {
|
||||
FFI_FIRST_ABI = 0,
|
||||
FFI_SYSV,
|
||||
FFI_UNUSED_1,
|
||||
FFI_UNUSED_2,
|
||||
FFI_UNUSED_3,
|
||||
FFI_LAST_ABI,
|
||||
|
||||
FFI_DEFAULT_ABI = FFI_SYSV
|
||||
} ffi_abi;
|
||||
|
||||
#endif /* LIBFFI_ASM */
|
||||
|
||||
/* ---- Definitions for closures ----------------------------------------- */
|
||||
|
||||
#define FFI_CLOSURES 1
|
||||
#define FFI_TRAMPOLINE_SIZE 24
|
||||
#define FFI_NATIVE_RAW_API 0
|
||||
#define FFI_EXTRA_CIF_FIELDS unsigned riscv_nfixedargs; unsigned riscv_unused;
|
||||
#define FFI_TARGET_SPECIFIC_VARIADIC
|
||||
|
||||
#endif
|
||||
|
||||
|
|
@ -0,0 +1,214 @@
|
|||
/* -----------------------------------------------------------------------
|
||||
ffi.c - Copyright (c) 2015 Michael Knyszek <mknyszek@berkeley.edu>
|
||||
2015 Andrew Waterman <waterman@cs.berkeley.edu>
|
||||
2018 Stef O'Rear <sorear2@gmail.com>
|
||||
|
||||
RISC-V Foreign Function Interface
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining
|
||||
a copy of this software and associated documentation files (the
|
||||
``Software''), to deal in the Software without restriction, including
|
||||
without limitation the rights to use, copy, modify, merge, publish,
|
||||
distribute, sublicense, and/or sell copies of the Software, and to
|
||||
permit persons to whom the Software is furnished to do so, subject to
|
||||
the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included
|
||||
in all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
|
||||
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
||||
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
||||
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
DEALINGS IN THE SOFTWARE.
|
||||
----------------------------------------------------------------------- */
|
||||
|
||||
#define LIBFFI_ASM
|
||||
#include <fficonfig.h>
|
||||
#include <ffi.h>
|
||||
|
||||
/* Define aliases so that we can handle all ABIs uniformly */
|
||||
|
||||
#if __SIZEOF_POINTER__ == 8
|
||||
#define PTRS 8
|
||||
#define LARG ld
|
||||
#define SARG sd
|
||||
#else
|
||||
#define PTRS 4
|
||||
#define LARG lw
|
||||
#define SARG sw
|
||||
#endif
|
||||
|
||||
#if __riscv_float_abi_double
|
||||
#define FLTS 8
|
||||
#define FLARG fld
|
||||
#define FSARG fsd
|
||||
#elif __riscv_float_abi_single
|
||||
#define FLTS 4
|
||||
#define FLARG flw
|
||||
#define FSARG fsw
|
||||
#else
|
||||
#define FLTS 0
|
||||
#endif
|
||||
|
||||
#define fp s0
|
||||
|
||||
.text
|
||||
.globl ffi_call_asm
|
||||
.type ffi_call_asm, @function
|
||||
.hidden ffi_call_asm
|
||||
/*
|
||||
struct call_context {
|
||||
floatreg fa[8];
|
||||
intreg a[8];
|
||||
intreg pad[rv32 ? 2 : 0];
|
||||
intreg save_fp, save_ra;
|
||||
}
|
||||
void ffi_call_asm(size_t *stackargs, struct call_context *regargs,
|
||||
void (*fn)(void));
|
||||
*/
|
||||
|
||||
#define FRAME_LEN (8 * FLTS + 8 * PTRS + 16)
|
||||
|
||||
ffi_call_asm:
|
||||
.cfi_startproc
|
||||
|
||||
/*
|
||||
We are NOT going to set up an ordinary stack frame. In order to pass
|
||||
the stacked args to the called function, we adjust our stack pointer to
|
||||
a0, which is in the _caller's_ alloca area. We establish our own stack
|
||||
frame at the end of the call_context.
|
||||
|
||||
Anything below the arguments will be freed at this point, although we
|
||||
preserve the call_context so that it can be read back in the caller.
|
||||
*/
|
||||
|
||||
.cfi_def_cfa 11, FRAME_LEN # interim CFA based on a1
|
||||
SARG fp, FRAME_LEN - 2*PTRS(a1)
|
||||
.cfi_offset 8, -2*PTRS
|
||||
SARG ra, FRAME_LEN - 1*PTRS(a1)
|
||||
.cfi_offset 1, -1*PTRS
|
||||
|
||||
addi fp, a1, FRAME_LEN
|
||||
mv sp, a0
|
||||
.cfi_def_cfa 8, 0 # our frame is fully set up
|
||||
|
||||
# Load arguments
|
||||
mv t1, a2
|
||||
|
||||
#if FLTS
|
||||
FLARG fa0, -FRAME_LEN+0*FLTS(fp)
|
||||
FLARG fa1, -FRAME_LEN+1*FLTS(fp)
|
||||
FLARG fa2, -FRAME_LEN+2*FLTS(fp)
|
||||
FLARG fa3, -FRAME_LEN+3*FLTS(fp)
|
||||
FLARG fa4, -FRAME_LEN+4*FLTS(fp)
|
||||
FLARG fa5, -FRAME_LEN+5*FLTS(fp)
|
||||
FLARG fa6, -FRAME_LEN+6*FLTS(fp)
|
||||
FLARG fa7, -FRAME_LEN+7*FLTS(fp)
|
||||
#endif
|
||||
|
||||
LARG a0, -FRAME_LEN+8*FLTS+0*PTRS(fp)
|
||||
LARG a1, -FRAME_LEN+8*FLTS+1*PTRS(fp)
|
||||
LARG a2, -FRAME_LEN+8*FLTS+2*PTRS(fp)
|
||||
LARG a3, -FRAME_LEN+8*FLTS+3*PTRS(fp)
|
||||
LARG a4, -FRAME_LEN+8*FLTS+4*PTRS(fp)
|
||||
LARG a5, -FRAME_LEN+8*FLTS+5*PTRS(fp)
|
||||
LARG a6, -FRAME_LEN+8*FLTS+6*PTRS(fp)
|
||||
LARG a7, -FRAME_LEN+8*FLTS+7*PTRS(fp)
|
||||
|
||||
/* Call */
|
||||
jalr t1
|
||||
|
||||
/* Save return values - only a0/a1 (fa0/fa1) are used */
|
||||
#if FLTS
|
||||
FSARG fa0, -FRAME_LEN+0*FLTS(fp)
|
||||
FSARG fa1, -FRAME_LEN+1*FLTS(fp)
|
||||
#endif
|
||||
|
||||
SARG a0, -FRAME_LEN+8*FLTS+0*PTRS(fp)
|
||||
SARG a1, -FRAME_LEN+8*FLTS+1*PTRS(fp)
|
||||
|
||||
/* Restore and return */
|
||||
addi sp, fp, -FRAME_LEN
|
||||
.cfi_def_cfa 2, FRAME_LEN
|
||||
LARG ra, -1*PTRS(fp)
|
||||
.cfi_restore 1
|
||||
LARG fp, -2*PTRS(fp)
|
||||
.cfi_restore 8
|
||||
ret
|
||||
.cfi_endproc
|
||||
.size ffi_call_asm, .-ffi_call_asm
|
||||
|
||||
|
||||
/*
|
||||
ffi_closure_asm. Expects address of the passed-in ffi_closure in t1.
|
||||
void ffi_closure_inner(size_t *stackargs, struct call_context *regargs,
|
||||
ffi_closure *closure);
|
||||
*/
|
||||
|
||||
.globl ffi_closure_asm
|
||||
.hidden ffi_closure_asm
|
||||
.type ffi_closure_asm, @function
|
||||
ffi_closure_asm:
|
||||
.cfi_startproc
|
||||
|
||||
addi sp, sp, -FRAME_LEN
|
||||
.cfi_def_cfa_offset FRAME_LEN
|
||||
|
||||
/* make a frame */
|
||||
SARG fp, FRAME_LEN - 2*PTRS(sp)
|
||||
.cfi_offset 8, -2*PTRS
|
||||
SARG ra, FRAME_LEN - 1*PTRS(sp)
|
||||
.cfi_offset 1, -1*PTRS
|
||||
addi fp, sp, FRAME_LEN
|
||||
|
||||
/* save arguments */
|
||||
#if FLTS
|
||||
FSARG fa0, 0*FLTS(sp)
|
||||
FSARG fa1, 1*FLTS(sp)
|
||||
FSARG fa2, 2*FLTS(sp)
|
||||
FSARG fa3, 3*FLTS(sp)
|
||||
FSARG fa4, 4*FLTS(sp)
|
||||
FSARG fa5, 5*FLTS(sp)
|
||||
FSARG fa6, 6*FLTS(sp)
|
||||
FSARG fa7, 7*FLTS(sp)
|
||||
#endif
|
||||
|
||||
SARG a0, 8*FLTS+0*PTRS(sp)
|
||||
SARG a1, 8*FLTS+1*PTRS(sp)
|
||||
SARG a2, 8*FLTS+2*PTRS(sp)
|
||||
SARG a3, 8*FLTS+3*PTRS(sp)
|
||||
SARG a4, 8*FLTS+4*PTRS(sp)
|
||||
SARG a5, 8*FLTS+5*PTRS(sp)
|
||||
SARG a6, 8*FLTS+6*PTRS(sp)
|
||||
SARG a7, 8*FLTS+7*PTRS(sp)
|
||||
|
||||
/* enter C */
|
||||
addi a0, sp, FRAME_LEN
|
||||
mv a1, sp
|
||||
mv a2, t1
|
||||
|
||||
call ffi_closure_inner
|
||||
|
||||
/* return values */
|
||||
#if FLTS
|
||||
FLARG fa0, 0*FLTS(sp)
|
||||
FLARG fa1, 1*FLTS(sp)
|
||||
#endif
|
||||
|
||||
LARG a0, 8*FLTS+0*PTRS(sp)
|
||||
LARG a1, 8*FLTS+1*PTRS(sp)
|
||||
|
||||
/* restore and return */
|
||||
LARG ra, FRAME_LEN-1*PTRS(sp)
|
||||
.cfi_restore 1
|
||||
LARG fp, FRAME_LEN-2*PTRS(sp)
|
||||
.cfi_restore 8
|
||||
addi sp, sp, FRAME_LEN
|
||||
.cfi_def_cfa_offset 0
|
||||
ret
|
||||
.cfi_endproc
|
||||
.size ffi_closure_asm, .-ffi_closure_asm
|
||||
Loading…
Reference in New Issue