On Tue, 22 Aug 2023, Lulu Cheng wrote:
> This is a backport of <https://github.com/libffi/libffi/commit/f259a6f6de>,
> and contains modifications to commit 5a4774cd4d, as well as the LoongArch
> schema portion of commit ee22ecbd11. This is needed for libgo.
OK.
>
> libffi/ChangeLog:
>
> * configure.host: Add LoongArch support.
> * Makefile.am: Likewise.
> * Makefile.in: Regenerate.
> * src/loongarch64/ffi.c: New file.
> * src/loongarch64/ffitarget.h: New file.
> * src/loongarch64/sysv.S: New file.
> ---
> libffi/Makefile.am | 4 +-
> libffi/Makefile.in | 25 +-
> libffi/configure.host | 5 +
> libffi/src/loongarch64/ffi.c | 621 +++++++++++++++++++++++++++++
> libffi/src/loongarch64/ffitarget.h | 82 ++++
> libffi/src/loongarch64/sysv.S | 327 +++++++++++++++
> 6 files changed, 1058 insertions(+), 6 deletions(-)
> create mode 100644 libffi/src/loongarch64/ffi.c
> create mode 100644 libffi/src/loongarch64/ffitarget.h
> create mode 100644 libffi/src/loongarch64/sysv.S
>
> diff --git a/libffi/Makefile.am b/libffi/Makefile.am
> index c6d6f849c53..2259ddb75f9 100644
> --- a/libffi/Makefile.am
> +++ b/libffi/Makefile.am
> @@ -139,7 +139,7 @@ noinst_HEADERS = src/aarch64/ffitarget.h
> src/aarch64/internal.h \
> src/sparc/internal.h src/tile/ffitarget.h src/vax/ffitarget.h \
> src/x86/ffitarget.h src/x86/internal.h src/x86/internal64.h \
> src/x86/asmnames.h src/xtensa/ffitarget.h src/dlmalloc.c \
> - src/kvx/ffitarget.h
> + src/kvx/ffitarget.h src/loongarch64/ffitarget.h
>
> EXTRA_libffi_la_SOURCES = src/aarch64/ffi.c src/aarch64/sysv.S
> \
> src/aarch64/win64_armasm.S src/alpha/ffi.c src/alpha/osf.S \
> @@ -169,7 +169,7 @@ EXTRA_libffi_la_SOURCES = src/aarch64/ffi.c
> src/aarch64/sysv.S \
> src/x86/ffiw64.c src/x86/win64.S src/x86/ffi64.c \
> src/x86/unix64.S src/x86/sysv_intel.S src/x86/win64_intel.S \
> src/xtensa/ffi.c src/xtensa/sysv.S src/kvx/ffi.c \
> - src/kvx/sysv.S
> + src/kvx/sysv.S src/loongarch64/ffi.c src/loongarch64/sysv.S
>
> TARGET_OBJ = @TARGET_OBJ@
> libffi_la_LIBADD = $(TARGET_OBJ)
> diff --git a/libffi/Makefile.in b/libffi/Makefile.in
> index 5524a6a571e..1d936b5c8a5 100644
> --- a/libffi/Makefile.in
> +++ b/libffi/Makefile.in
> @@ -550,7 +550,7 @@ noinst_HEADERS = src/aarch64/ffitarget.h
> src/aarch64/internal.h \
> src/sparc/internal.h src/tile/ffitarget.h src/vax/ffitarget.h \
> src/x86/ffitarget.h src/x86/internal.h src/x86/internal64.h \
> src/x86/asmnames.h src/xtensa/ffitarget.h src/dlmalloc.c \
> - src/kvx/ffitarget.h
> + src/kvx/ffitarget.h src/loongarch64/ffitarget.h
>
> EXTRA_libffi_la_SOURCES = src/aarch64/ffi.c src/aarch64/sysv.S
> \
> src/aarch64/win64_armasm.S src/alpha/ffi.c src/alpha/osf.S \
> @@ -580,7 +580,7 @@ EXTRA_libffi_la_SOURCES = src/aarch64/ffi.c
> src/aarch64/sysv.S \
> src/x86/ffiw64.c src/x86/win64.S src/x86/ffi64.c \
> src/x86/unix64.S src/x86/sysv_intel.S src/x86/win64_intel.S \
> src/xtensa/ffi.c src/xtensa/sysv.S src/kvx/ffi.c \
> - src/kvx/sysv.S
> + src/kvx/sysv.S src/loongarch64/ffi.c src/loongarch64/sysv.S
>
> libffi_la_LIBADD = $(TARGET_OBJ)
> libffi_convenience_la_SOURCES = $(libffi_la_SOURCES)
> @@ -1074,6 +1074,16 @@ src/kvx/ffi.lo: src/kvx/$(am__dirstamp) \
> src/kvx/$(DEPDIR)/$(am__dirstamp)
> src/kvx/sysv.lo: src/kvx/$(am__dirstamp) \
> src/kvx/$(DEPDIR)/$(am__dirstamp)
> +src/loongarch64/$(am__dirstamp):
> + @$(MKDIR_P) src/loongarch64
> + @: > src/loongarch64/$(am__dirstamp)
> +src/loongarch64/$(DEPDIR)/$(am__dirstamp):
> + @$(MKDIR_P) src/loongarch64/$(DEPDIR)
> + @: > src/loongarch64/$(DEPDIR)/$(am__dirstamp)
> +src/loongarch64/ffi.lo: src/loongarch64/$(am__dirstamp) \
> + src/loongarch64/$(DEPDIR)/$(am__dirstamp)
> +src/loongarch64/sysv.lo: src/loongarch64/$(am__dirstamp) \
> + src/loongarch64/$(DEPDIR)/$(am__dirstamp)
>
> libffi.la: $(libffi_la_OBJECTS) $(libffi_la_DEPENDENCIES)
> $(EXTRA_libffi_la_DEPENDENCIES)
> $(AM_V_CCLD)$(libffi_la_LINK) -rpath $(toolexeclibdir)
> $(libffi_la_OBJECTS) $(libffi_la_LIBADD) $(LIBS)
> @@ -1107,6 +1117,8 @@ mostlyclean-compile:
> -rm -f src/ia64/*.lo
> -rm -f src/kvx/*.$(OBJEXT)
> -rm -f src/kvx/*.lo
> + -rm -f src/loongarch64/*.$(OBJEXT)
> + -rm -f src/loongarch64/*.lo
> -rm -f src/m32r/*.$(OBJEXT)
> -rm -f src/m32r/*.lo
> -rm -f src/m68k/*.$(OBJEXT)
> @@ -1182,6 +1194,8 @@ distclean-compile:
> @AMDEP_TRUE@@am__include@ @am__quote@src/ia64/$(DEPDIR)/unix.Plo@am__quote@
> @AMDEP_TRUE@@am__include@ @am__quote@src/kvx/$(DEPDIR)/ffi.Plo@am__quote@
> @AMDEP_TRUE@@am__include@ @am__quote@src/kvx/$(DEPDIR)/sysv.Plo@am__quote@
> +@AMDEP_TRUE@@am__include@
> @am__quote@src/loongarch64/$(DEPDIR)/ffi.Plo@am__quote@
> +@AMDEP_TRUE@@am__include@
> @am__quote@src/loongarch64/$(DEPDIR)/sysv.Plo@am__quote@
> @AMDEP_TRUE@@am__include@ @am__quote@src/m32r/$(DEPDIR)/ffi.Plo@am__quote@
> @AMDEP_TRUE@@am__include@ @am__quote@src/m32r/$(DEPDIR)/sysv.Plo@am__quote@
> @AMDEP_TRUE@@am__include@ @am__quote@src/m68k/$(DEPDIR)/ffi.Plo@am__quote@
> @@ -1308,6 +1322,7 @@ clean-libtool:
> -rm -rf src/frv/.libs src/frv/_libs
> -rm -rf src/ia64/.libs src/ia64/_libs
> -rm -rf src/kvx/.libs src/kvx/_libs
> + -rm -rf src/loongarch64/.libs src/loongarch64/_libs
> -rm -rf src/m32r/.libs src/m32r/_libs
> -rm -rf src/m68k/.libs src/m68k/_libs
> -rm -rf src/m88k/.libs src/m88k/_libs
> @@ -1658,6 +1673,8 @@ distclean-generic:
> -rm -f src/ia64/$(am__dirstamp)
> -rm -f src/kvx/$(DEPDIR)/$(am__dirstamp)
> -rm -f src/kvx/$(am__dirstamp)
> + -rm -f src/loongarch64/$(DEPDIR)/$(am__dirstamp)
> + -rm -f src/loongarch64/$(am__dirstamp)
> -rm -f src/m32r/$(DEPDIR)/$(am__dirstamp)
> -rm -f src/m32r/$(am__dirstamp)
> -rm -f src/m68k/$(DEPDIR)/$(am__dirstamp)
> @@ -1712,7 +1729,7 @@ clean-am: clean-aminfo clean-generic clean-libtool
> clean-local \
>
> distclean: distclean-recursive
> -rm -f $(am__CONFIG_DISTCLEAN_FILES)
> - -rm -rf src/$(DEPDIR) src/aarch64/$(DEPDIR) src/alpha/$(DEPDIR)
> src/arc/$(DEPDIR) src/arm/$(DEPDIR) src/avr32/$(DEPDIR) src/bfin/$(DEPDIR)
> src/cris/$(DEPDIR) src/csky/$(DEPDIR) src/frv/$(DEPDIR) src/ia64/$(DEPDIR)
> src/kvx/$(DEPDIR) src/m32r/$(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/$(DEPDIR)
> + -rm -rf src/$(DEPDIR) src/aarch64/$(DEPDIR) src/alpha/$(DEPDIR)
> src/arc/$(DEPDIR) src/arm/$(DEPDIR) src/avr32/$(DEPDIR) src/bfin/$(DEPDIR)
> src/cris/$(DEPDIR) src/csky/$(DEPDIR) src/frv/$(DEPDIR) src/ia64/$(DEPDIR)
> src/kvx/$(DEPDIR) src/loongarch64/$(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)
> -rm -f Makefile
> distclean-am: clean-am distclean-compile distclean-generic \
> distclean-hdr distclean-libtool distclean-local distclean-tags
> @@ -1851,7 +1868,7 @@ installcheck-am:
> maintainer-clean: maintainer-clean-recursive
> -rm -f $(am__CONFIG_DISTCLEAN_FILES)
> -rm -rf $(top_srcdir)/autom4te.cache
> - -rm -rf src/$(DEPDIR) src/aarch64/$(DEPDIR) src/alpha/$(DEPDIR)
> src/arc/$(DEPDIR) src/arm/$(DEPDIR) src/avr32/$(DEPDIR) src/bfin/$(DEPDIR)
> src/cris/$(DEPDIR) src/csky/$(DEPDIR) src/frv/$(DEPDIR) src/ia64/$(DEPDIR)
> src/kvx/$(DEPDIR) src/m32r/$(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/$(DEPDIR)
> + -rm -rf src/$(DEPDIR) src/aarch64/$(DEPDIR) src/alpha/$(DEPDIR)
> src/arc/$(DEPDIR) src/arm/$(DEPDIR) src/avr32/$(DEPDIR) src/bfin/$(DEPDIR)
> src/cris/$(DEPDIR) src/csky/$(DEPDIR) src/frv/$(DEPDIR) src/ia64/$(DEPDIR)
> src/kvx/$(DEPDIR) src/loongarch64/$(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)
> -rm -f Makefile
> maintainer-clean-am: distclean-am maintainer-clean-aminfo \
> maintainer-clean-generic maintainer-clean-local \
> diff --git a/libffi/configure.host b/libffi/configure.host
> index 268267183a0..9d73f18ee8c 100644
> --- a/libffi/configure.host
> +++ b/libffi/configure.host
> @@ -140,6 +140,11 @@ case "${host}" in
> SOURCES="ffi.c sysv.S"
> ;;
>
> + loongarch64-*-*)
> + TARGET=LOONGARCH64; TARGETDIR=loongarch64
> + SOURCES="ffi.c sysv.S"
> + ;;
> +
> m32r*-*-*)
> TARGET=M32R; TARGETDIR=m32r
> SOURCES="ffi.c sysv.S"
> diff --git a/libffi/src/loongarch64/ffi.c b/libffi/src/loongarch64/ffi.c
> new file mode 100644
> index 00000000000..140be3bc3dc
> --- /dev/null
> +++ b/libffi/src/loongarch64/ffi.c
> @@ -0,0 +1,621 @@
> +/* -----------------------------------------------------------------------
> + ffi.c - Copyright (c) 2022 Xu Chenghua <xucheng...@loongson.cn>
> + 2022 Cheng Lulu <chengl...@loongson.cn>
> + Based on RISC-V port
> +
> + LoongArch 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.
> + ----------------------------------------------------------------------- */
> +
> +#include <ffi.h>
> +#include <ffi_common.h>
> +
> +#include <stdlib.h>
> +#include <stdint.h>
> +
> +#if defined(__loongarch_soft_float)
> +# define ABI_FRLEN 0
> +#elif defined(__loongarch_single_float)
> +# define ABI_FRLEN 32
> +# define ABI_FLOAT float
> +#elif defined(__loongarch_double_float)
> +# define ABI_FRLEN 64
> +# define ABI_FLOAT double
> +#else
> +#error unsupported LoongArch floating-point ABI
> +#endif
> +
> +#define NARGREG 8
> +#define STKALIGN 16
> +#define MAXCOPYARG (2 * sizeof (double))
> +
> +/* call_context registers
> + - 8 floating point parameter/result registers.
> + - 8 integer parameter/result registers.
> + - 2 registers used by the assembly code to in-place construct its own
> + stack frame
> + - frame register
> + - return register
> +*/
> +typedef struct call_context
> +{
> + ABI_FLOAT fa[8];
> + size_t a[10];
> +} call_context;
> +
> +typedef struct call_builder
> +{
> + call_context *aregs;
> + int used_integer;
> + int used_float;
> + size_t *used_stack;
> + size_t *stack;
> + size_t next_struct_area;
> +} call_builder;
> +
> +/* Integer (not pointer) less than ABI GRLEN. */
> +/* FFI_TYPE_INT does not appear to be used. */
> +#if __SIZEOF_POINTER__ == 8
> +# define IS_INT(type) ((type) >= FFI_TYPE_UINT8 && (type) <= FFI_TYPE_SINT64)
> +#else
> +# define IS_INT(type) ((type) >= FFI_TYPE_UINT8 && (type) <= FFI_TYPE_SINT32)
> +#endif
> +
> +#if ABI_FRLEN
> +typedef struct float_struct_info
> +{
> + char as_elements;
> + char type1;
> + char offset2;
> + char type2;
> +} float_struct_info;
> +
> +#if ABI_FRLEN >= 64
> +# define IS_FLOAT(type) ((type) >= FFI_TYPE_FLOAT && (type) <=
> FFI_TYPE_DOUBLE)
> +#else
> +# define IS_FLOAT(type) ((type) == FFI_TYPE_FLOAT)
> +#endif
> +
> +static ffi_type **
> +flatten_struct (ffi_type *in, ffi_type **out, ffi_type **out_end)
> +{
> + int i;
> +
> + if (out == out_end)
> + return out;
> + if (in->type != FFI_TYPE_STRUCT)
> + *(out++) = in;
> + else
> + for (i = 0; in->elements[i]; i++)
> + out = flatten_struct (in->elements[i], out, out_end);
> + return out;
> +}
> +
> +/* Structs with at most two fields after flattening, one of which is of
> + floating point type, are passed in multiple registers if sufficient
> + registers are available. */
> +static float_struct_info
> +struct_passed_as_elements (call_builder *cb, ffi_type *top)
> +{
> + float_struct_info ret = {0, 0, 0, 0};
> + ffi_type *fields[3];
> + int num_floats, num_ints;
> + int num_fields = flatten_struct (top, fields, fields + 3) - fields;
> +
> + if (num_fields == 1)
> + {
> + if (IS_FLOAT (fields[0]->type))
> + {
> + ret.as_elements = 1;
> + ret.type1 = fields[0]->type;
> + }
> + }
> + else if (num_fields == 2)
> + {
> + num_floats = IS_FLOAT (fields[0]->type) + IS_FLOAT (fields[1]->type);
> + num_ints = IS_INT (fields[0]->type) + IS_INT (fields[1]->type);
> + if (num_floats == 0 || num_floats + num_ints != 2)
> + return ret;
> + if (cb->used_float + num_floats > NARGREG
> + || cb->used_integer + (2 - num_floats) > NARGREG)
> + return ret;
> + if (!IS_FLOAT (fields[0]->type) && !IS_FLOAT (fields[1]->type))
> + return ret;
> +
> + ret.type1 = fields[0]->type;
> + ret.type2 = fields[1]->type;
> + ret.offset2 = FFI_ALIGN (fields[0]->size, fields[1]->alignment);
> + ret.as_elements = 1;
> + }
> + return ret;
> +}
> +#endif
> +
> +/* Allocates a single register, float register, or GRLEN-sized stack slot to
> a
> + datum. */
> +static void
> +marshal_atom (call_builder *cb, int type, void *data)
> +{
> + size_t value = 0;
> + switch (type)
> + {
> + case FFI_TYPE_UINT8:
> + value = *(uint8_t *) data;
> + break;
> + case FFI_TYPE_SINT8:
> + value = *(int8_t *) data;
> + break;
> + case FFI_TYPE_UINT16:
> + value = *(uint16_t *) data;
> + break;
> + case FFI_TYPE_SINT16:
> + value = *(int16_t *) data;
> + break;
> + /* 32-bit quantities are always sign-extended in the ABI. */
> + case FFI_TYPE_UINT32:
> + value = *(int32_t *) data;
> + break;
> + case FFI_TYPE_SINT32:
> + value = *(int32_t *) data;
> + break;
> +#if __SIZEOF_POINTER__ == 8
> + case FFI_TYPE_UINT64:
> + value = *(uint64_t *) data;
> + break;
> + case FFI_TYPE_SINT64:
> + value = *(int64_t *) data;
> + break;
> +#endif
> + case FFI_TYPE_POINTER:
> + value = *(size_t *) data;
> + break;
> +
> +#if ABI_FRLEN >= 32
> + case FFI_TYPE_FLOAT:
> + *(float *)(cb->aregs->fa + cb->used_float++) = *(float *) data;
> + return;
> +#endif
> +#if ABI_FRLEN >= 64
> + case FFI_TYPE_DOUBLE:
> + (cb->aregs->fa[cb->used_float++]) = *(double *) data;
> + return;
> +#endif
> + default:
> + FFI_ASSERT (0);
> + break;
> + }
> +
> + if (cb->used_integer == NARGREG)
> + *cb->used_stack++ = value;
> + else
> + cb->aregs->a[cb->used_integer++] = value;
> +}
> +
> +static void
> +unmarshal_atom (call_builder *cb, int type, void *data)
> +{
> + size_t value;
> + switch (type)
> + {
> +#if ABI_FRLEN >= 32
> + case FFI_TYPE_FLOAT:
> + *(float *) data = *(float *)(cb->aregs->fa + cb->used_float++);
> + return;
> +#endif
> +#if ABI_FRLEN >= 64
> + case FFI_TYPE_DOUBLE:
> + *(double *) data = cb->aregs->fa[cb->used_float++];
> + return;
> +#endif
> + }
> +
> + if (cb->used_integer == NARGREG)
> + value = *cb->used_stack++;
> + else
> + value = cb->aregs->a[cb->used_integer++];
> +
> + switch (type)
> + {
> + case FFI_TYPE_UINT8:
> + case FFI_TYPE_SINT8:
> + case FFI_TYPE_UINT16:
> + case FFI_TYPE_SINT16:
> + case FFI_TYPE_UINT32:
> + case FFI_TYPE_SINT32:
> +#if __SIZEOF_POINTER__ == 8
> + case FFI_TYPE_UINT64:
> + case FFI_TYPE_SINT64:
> +#endif
> + case FFI_TYPE_POINTER:
> + *(ffi_arg *)data = value;
> + break;
> + default:
> + FFI_ASSERT (0);
> + break;
> + }
> +}
> +
> +/* Allocate and copy a structure that is passed by value on the stack and
> + return a pointer to it. */
> +static void *
> +allocate_and_copy_struct_to_stack (call_builder *cb, void *data,
> + ffi_type *type)
> +{
> + size_t dest = cb->next_struct_area - type->size;
> +
> + dest = FFI_ALIGN_DOWN (dest, type->alignment);
> + cb->next_struct_area = dest;
> +
> + return memcpy ((char *)cb->stack + dest, data, type->size);
> +}
> +
> +/* 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_FRLEN
> + 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;
> + }
> +
> + double promoted;
> + if (var && type->type == FFI_TYPE_FLOAT)
> + {
> + /* C standard requires promoting float -> double for variable arg. */
> + promoted = *(float *) data;
> + type = &ffi_type_double;
> + data = &promoted;
> + }
> +#endif
> +
> + if (type->size > 2 * __SIZEOF_POINTER__)
> + /* Pass by reference. */
> + {
> + allocate_and_copy_struct_to_stack (cb, data, type);
> + data = (char *)cb->stack + cb->next_struct_area;
> + 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 = FFI_ALIGN (cb->used_integer, 2);
> + cb->used_stack
> + = (size_t *) FFI_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_FRLEN
> + 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;
> + }
> +
> + if (var && type->type == FFI_TYPE_FLOAT)
> + {
> + int m = cb->used_integer;
> + void *promoted
> + = m < NARGREG ? cb->aregs->a + m : cb->used_stack + m - NARGREG + 1;
> + *(float *) promoted = *(double *) promoted;
> + }
> +#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 = FFI_ALIGN (cb->used_integer, 2);
> + cb->used_stack
> + = (size_t *) FFI_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_FRLEN
> + 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->loongarch_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->loongarch_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), void *closure) FFI_HIDDEN;
> +
> +static void
> +ffi_call_int (ffi_cif *cif, void (*fn) (void), void *rvalue, void **avalue,
> + void *closure)
> +{
> + /* This is a conservative estimate, assuming a complex return value and
> + that all remaining arguments are long long / __int128 */
> + size_t arg_bytes = cif->bytes;
> + size_t rval_bytes = 0;
> + if (rvalue == NULL && cif->rtype->size > 2 * __SIZEOF_POINTER__)
> + rval_bytes = FFI_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 in LP64 ABIs. */
> + 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 = FFI_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;
> + cb.stack = (void *) alloc_base;
> + cb.next_struct_area = arg_bytes;
> +
> + int return_by_ref = passed_by_ref (&cb, cif->rtype, 0);
> + if (return_by_ref)
> + cb.aregs->a[cb.used_integer++] = (size_t)rvalue;
> +
> + int i;
> + for (i = 0; i < cif->nargs; i++)
> + marshal (&cb, cif->arg_types[i], i >= cif->loongarch_nfixedargs,
> + avalue[i]);
> +
> + ffi_call_asm ((void *) alloc_base, cb.aregs, fn, closure);
> +
> + cb.used_float = cb.used_integer = 0;
> + if (!return_by_ref && rvalue)
> + unmarshal (&cb, cif->rtype, 0, rvalue);
> +}
> +
> +void
> +ffi_call (ffi_cif *cif, void (*fn) (void), void *rvalue, void **avalue)
> +{
> + ffi_call_int (cif, fn, rvalue, avalue, NULL);
> +}
> +
> +void
> +ffi_call_go (ffi_cif *cif, void (*fn) (void), void *rvalue, void **avalue,
> + void *closure)
> +{
> + ffi_call_int (cif, fn, rvalue, avalue, closure);
> +}
> +
> +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;
> +
> +#if defined(FFI_EXEC_STATIC_TRAMP)
> + if (ffi_tramp_is_present(closure))
> + {
> + ffi_tramp_set_parms (closure->ftramp, ffi_closure_asm, closure);
> + goto out;
> + }
> +#endif
> +
> + /* Fill the dynamic trampoline. We will call ffi_closure_inner with
> codeloc,
> + not closure, but as long as the memory is readable it should work. */
> + tramp[0] = 0x1800000c; /* pcaddi $t0, 0 (i.e. $t0 <- tramp) */
> + tramp[1] = 0x28c0418d; /* ld.d $t1, $t0, 16 */
> + tramp[2] = 0x4c0001a0; /* jirl $zero, $t1, 0 */
> + tramp[3] = 0x03400000; /* nop */
> + tramp[4] = fn;
> + tramp[5] = fn >> 32;
> +
> + __builtin___clear_cache (codeloc, codeloc + FFI_TRAMPOLINE_SIZE);
> +
> +#if defined(FFI_EXEC_STATIC_TRAMP)
> +out:
> +#endif
> + closure->cif = cif;
> + closure->fun = fun;
> + closure->user_data = user_data;
> +
> + return FFI_OK;
> +}
> +
> +extern void ffi_go_closure_asm (void) FFI_HIDDEN;
> +
> +ffi_status
> +ffi_prep_go_closure (ffi_go_closure *closure, ffi_cif *cif,
> + void (*fun) (ffi_cif *, void *, void **, void *))
> +{
> + if (cif->abi <= FFI_FIRST_ABI || cif->abi >= FFI_LAST_ABI)
> + return FFI_BAD_ABI;
> +
> + closure->tramp = (void *) ffi_go_closure_asm;
> + closure->cif = cif;
> + closure->fun = fun;
> + 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 (ffi_cif *cif,
> + void (*fun) (ffi_cif *, void *, void **, void *),
> + void *user_data, size_t *stack, call_context *aregs)
> +{
> + 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->loongarch_nfixedargs,
> + astorage + i * MAXCOPYARG);
> +
> + fun (cif, rvalue, avalue, 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);
> + }
> +}
> +
> +#if defined(FFI_EXEC_STATIC_TRAMP)
> +void *
> +ffi_tramp_arch (size_t *tramp_size, size_t *map_size)
> +{
> + extern void *trampoline_code_table;
> +
> + *tramp_size = 16;
> + /* A mapping size of 64K is chosen to cover the page sizes of 4K, 16K, and
> + 64K. */
> + *map_size = 1 << 16;
> + return &trampoline_code_table;
> +}
> +#endif
> diff --git a/libffi/src/loongarch64/ffitarget.h
> b/libffi/src/loongarch64/ffitarget.h
> new file mode 100644
> index 00000000000..5a4698af308
> --- /dev/null
> +++ b/libffi/src/loongarch64/ffitarget.h
> @@ -0,0 +1,82 @@
> +/* -----------------------------------------------------------------*-C-*-
> + ffitarget.h - Copyright (c) 2022 Xu Chenghua <xucheng...@loongson.cn>
> + 2022 Cheng Lulu <chengl...@loongson.cn>
> +
> + Target configuration macros for LoongArch.
> +
> + 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 __loongarch__
> +#error \
> + "libffi was configured for a LoongArch target but this does not appear to
> be a LoongArch compiler."
> +#endif
> +
> +#ifndef LIBFFI_ASM
> +
> +typedef unsigned long ffi_arg;
> +typedef signed long ffi_sarg;
> +
> +typedef enum ffi_abi
> +{
> + FFI_FIRST_ABI = 0,
> + FFI_LP64S,
> + FFI_LP64F,
> + FFI_LP64D,
> + FFI_LAST_ABI,
> +
> +#if defined(__loongarch64)
> +#if defined(__loongarch_soft_float)
> + FFI_DEFAULT_ABI = FFI_LP64S
> +#elif defined(__loongarch_single_float)
> + FFI_DEFAULT_ABI = FFI_LP64F
> +#elif defined(__loongarch_double_float)
> + FFI_DEFAULT_ABI = FFI_LP64D
> +#else
> +#error unsupported LoongArch floating-point ABI
> +#endif
> +#else
> +#error unsupported LoongArch base architecture
> +#endif
> +} ffi_abi;
> +
> +#endif /* LIBFFI_ASM */
> +
> +/* ---- Definitions for closures ----------------------------------------- */
> +
> +#define FFI_CLOSURES 1
> +#define FFI_GO_CLOSURES 1
> +#define FFI_TRAMPOLINE_SIZE 24
> +#define FFI_NATIVE_RAW_API 0
> +#define FFI_EXTRA_CIF_FIELDS \
> + unsigned loongarch_nfixedargs; \
> + unsigned loongarch_unused;
> +#define FFI_TARGET_SPECIFIC_VARIADIC
> +#endif
> diff --git a/libffi/src/loongarch64/sysv.S b/libffi/src/loongarch64/sysv.S
> new file mode 100644
> index 00000000000..aa7bde2c1ef
> --- /dev/null
> +++ b/libffi/src/loongarch64/sysv.S
> @@ -0,0 +1,327 @@
> +/* -----------------------------------------------------------------------
> + sysv.S - Copyright (c) 2022 Xu Chenghua <xucheng...@loongson.cn>
> + 2022 Cheng Lulu <chengl...@loongson.cn>
> +
> + LoongArch 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.d
> +# define SARG st.d
> +#else
> +# define PTRS 4
> +# define LARG ld.w
> +# define SARG st.w
> +#endif
> +
> +#if defined(__loongarch_single_float)
> +# define FLTS 4
> +# define FLD fld.w
> +# define FST fst.w
> +#elif defined(__loongarch_double_float)
> +# define FLTS 8
> +# define FLARG fld.d
> +# define FSARG fst.d
> +#elif defined(__loongarch_soft_float)
> +# define FLTS 0
> +#else
> +#error unsupported LoongArch floating-point ABI
> +#endif
> +
> + .text
> + .globl ffi_call_asm
> + .type ffi_call_asm, @function
> + .hidden ffi_call_asm
> +/* struct call_context
> + {
> + ABI_FLOAT fa[8];
> + size_t a[10];
> + }
> +
> + - 8 floating point parameter/result registers (fa[0] - fa[7])
> + - 8 integer parameter/result registers (a[0] - a[7])
> + - 2 registers used by the assembly code to in-place construct its own
> stack
> + frame.
> + - frame pointer (a[8])
> + - return address (a[9])
> +
> + void ffi_call_asm (size_t *stackargs, struct call_context *regargs,
> + void (*fn)(void), void *closure); */
> +
> +#define FRAME_LEN (8 * FLTS + 10 * PTRS)
> +
> +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 5, FRAME_LEN # Interim CFA based on a1.
> + SARG $fp, $a1, FRAME_LEN - 2*PTRS
> + .cfi_offset 22, -2*PTRS
> + SARG $ra, $a1, FRAME_LEN - 1*PTRS
> + .cfi_offset 1, -1*PTRS
> +
> + addi.d $fp, $a1, FRAME_LEN
> + move $sp, $a0
> + .cfi_def_cfa 22, 0 # Our frame is fully set up.
> +
> + # Load arguments.
> + move $t1, $a2
> + move $t2, $a3
> +
> +#if FLTS
> + FLARG $fa0, $fp, -FRAME_LEN+0*FLTS
> + FLARG $fa1, $fp, -FRAME_LEN+1*FLTS
> + FLARG $fa2, $fp, -FRAME_LEN+2*FLTS
> + FLARG $fa3, $fp, -FRAME_LEN+3*FLTS
> + FLARG $fa4, $fp, -FRAME_LEN+4*FLTS
> + FLARG $fa5, $fp, -FRAME_LEN+5*FLTS
> + FLARG $fa6, $fp, -FRAME_LEN+6*FLTS
> + FLARG $fa7, $fp, -FRAME_LEN+7*FLTS
> +#endif
> +
> + LARG $a0, $fp, -FRAME_LEN+8*FLTS+0*PTRS
> + LARG $a1, $fp, -FRAME_LEN+8*FLTS+1*PTRS
> + LARG $a2, $fp, -FRAME_LEN+8*FLTS+2*PTRS
> + LARG $a3, $fp, -FRAME_LEN+8*FLTS+3*PTRS
> + LARG $a4, $fp, -FRAME_LEN+8*FLTS+4*PTRS
> + LARG $a5, $fp, -FRAME_LEN+8*FLTS+5*PTRS
> + LARG $a6, $fp, -FRAME_LEN+8*FLTS+6*PTRS
> + LARG $a7, $fp, -FRAME_LEN+8*FLTS+7*PTRS
> +
> + /* Call */
> + jirl $ra, $t1, 0
> +
> +#if FLTS
> + /* Save return values - only a0/a1 (fa0/fa1) are used. */
> + FSARG $fa0, $fp, -FRAME_LEN+0*FLTS
> + FSARG $fa1, $fp, -FRAME_LEN+1*FLTS
> +#endif
> +
> + SARG $a0, $fp, -FRAME_LEN+8*FLTS+0*PTRS
> + SARG $a1, $fp, -FRAME_LEN+8*FLTS+1*PTRS
> +
> + /* Restore and return. */
> + addi.d $sp, $fp, -FRAME_LEN
> + .cfi_def_cfa 3, FRAME_LEN
> + LARG $ra, $fp, -1*PTRS
> + .cfi_restore 1
> + LARG $fp, $fp, -2*PTRS
> + .cfi_restore 22
> + jr $ra
> + .cfi_endproc
> + .size ffi_call_asm, .-ffi_call_asm
> +
> +
> +/* ffi_closure_asm. Expects address of the passed-in ffi_closure in t0.
> + void ffi_closure_inner (ffi_cif *cif,
> + void (*fun)(ffi_cif *, void *, void **, void *),
> + void *user_data,
> + size_t *stackargs, struct call_context *regargs) */
> +
> + .globl ffi_closure_asm
> + .hidden ffi_closure_asm
> + .type ffi_closure_asm, @function
> +
> +ffi_closure_asm:
> + .cfi_startproc
> + addi.d $sp, $sp, -FRAME_LEN
> + .cfi_def_cfa_offset FRAME_LEN
> +
> + /* Make a frame. */
> + SARG $fp, $sp, FRAME_LEN - 2*PTRS
> + .cfi_offset 22, -2*PTRS
> + SARG $ra, $sp, FRAME_LEN - 1*PTRS
> + .cfi_offset 1, -1*PTRS
> + addi.d $fp, $sp, FRAME_LEN
> +
> + /* Save arguments. */
> +#if FLTS
> + FSARG $fa0, $sp, 0*FLTS
> + FSARG $fa1, $sp, 1*FLTS
> + FSARG $fa2, $sp, 2*FLTS
> + FSARG $fa3, $sp, 3*FLTS
> + FSARG $fa4, $sp, 4*FLTS
> + FSARG $fa5, $sp, 5*FLTS
> + FSARG $fa6, $sp, 6*FLTS
> + FSARG $fa7, $sp, 7*FLTS
> +#endif
> +
> + SARG $a0, $sp, 8*FLTS+0*PTRS
> + SARG $a1, $sp, 8*FLTS+1*PTRS
> + SARG $a2, $sp, 8*FLTS+2*PTRS
> + SARG $a3, $sp, 8*FLTS+3*PTRS
> + SARG $a4, $sp, 8*FLTS+4*PTRS
> + SARG $a5, $sp, 8*FLTS+5*PTRS
> + SARG $a6, $sp, 8*FLTS+6*PTRS
> + SARG $a7, $sp, 8*FLTS+7*PTRS
> +
> + /* Enter C */
> + LARG $a0, $t0, FFI_TRAMPOLINE_SIZE+0*PTRS
> + LARG $a1, $t0, FFI_TRAMPOLINE_SIZE+1*PTRS
> + LARG $a2, $t0, FFI_TRAMPOLINE_SIZE+2*PTRS
> + addi.d $a3, $sp, FRAME_LEN
> + move $a4, $sp
> +
> + bl ffi_closure_inner
> +
> + /* Return values. */
> +#if FLTS
> + FLARG $fa0, $sp, 0*FLTS
> + FLARG $fa1, $sp, 1*FLTS
> +#endif
> +
> + LARG $a0, $sp, 8*FLTS+0*PTRS
> + LARG $a1, $sp, 8*FLTS+1*PTRS
> +
> + /* Restore and return. */
> + LARG $ra, $sp, FRAME_LEN-1*PTRS
> + .cfi_restore 1
> + LARG $fp, $sp, FRAME_LEN-2*PTRS
> + .cfi_restore 22
> + addi.d $sp, $sp, FRAME_LEN
> + .cfi_def_cfa_offset 0
> + jr $ra
> + .cfi_endproc
> + .size ffi_closure_asm, .-ffi_closure_asm
> +
> +/* Static trampoline code table, in which each element is a trampoline.
> +
> + The trampoline clobbers t0 and t1, but we don't save them on the stack
> + because our psABI explicitly says they are scratch registers, at least for
> + ELF. Our dynamic trampoline is already clobbering them anyway.
> +
> + The trampoline has two parameters - target code to jump to and data for
> + the target code. The trampoline extracts the parameters from its parameter
> + block (see tramp_table_map()). The trampoline saves the data address in
> + t0 and jumps to the target code. As ffi_closure_asm() already expects the
> + data address to be in t0, we don't need a "ffi_closure_asm_alt". */
> +
> +#if defined(FFI_EXEC_STATIC_TRAMP)
> + .align 16
> + .globl trampoline_code_table
> + .hidden trampoline_code_table
> + .type trampoline_code_table, @function
> +
> +trampoline_code_table:
> +
> + .rept 65536 / 16
> + pcaddu12i $t1, 16 # 65536 >> 12
> + ld.d $t0, $t1, 0
> + ld.d $t1, $t1, 8
> + jirl $zero, $t1, 0
> + .endr
> + .size trampoline_code_table, .-trampoline_code_table
> +
> + .align 2
> +#endif
> +
> +/* ffi_go_closure_asm. Expects address of the passed-in ffi_go_closure in
> t2.
> + void ffi_closure_inner (ffi_cif *cif,
> + void (*fun)(ffi_cif *, void *, void **, void *),
> + void *user_data,
> + size_t *stackargs, struct call_context *regargs) */
> +
> + .globl ffi_go_closure_asm
> + .hidden ffi_go_closure_asm
> + .type ffi_go_closure_asm, @function
> +
> +ffi_go_closure_asm:
> + .cfi_startproc
> + addi.d $sp, $sp, -FRAME_LEN
> + .cfi_def_cfa_offset FRAME_LEN
> +
> + /* Make a frame. */
> + SARG $fp, $sp, FRAME_LEN - 2*PTRS
> + .cfi_offset 22, -2*PTRS
> + SARG $ra, $sp, FRAME_LEN - 1*PTRS
> + .cfi_offset 1, -1*PTRS
> + addi.d $fp, $sp, FRAME_LEN
> +
> + /* Save arguments. */
> +#if FLTS
> + FSARG $fa0, $sp, 0*FLTS
> + FSARG $fa1, $sp, 1*FLTS
> + FSARG $fa2, $sp, 2*FLTS
> + FSARG $fa3, $sp, 3*FLTS
> + FSARG $fa4, $sp, 4*FLTS
> + FSARG $fa5, $sp, 5*FLTS
> + FSARG $fa6, $sp, 6*FLTS
> + FSARG $fa7, $sp, 7*FLTS
> +#endif
> +
> + SARG $a0, $sp, 8*FLTS+0*PTRS
> + SARG $a1, $sp, 8*FLTS+1*PTRS
> + SARG $a2, $sp, 8*FLTS+2*PTRS
> + SARG $a3, $sp, 8*FLTS+3*PTRS
> + SARG $a4, $sp, 8*FLTS+4*PTRS
> + SARG $a5, $sp, 8*FLTS+5*PTRS
> + SARG $a6, $sp, 8*FLTS+6*PTRS
> + SARG $a7, $sp, 8*FLTS+7*PTRS
> +
> + /* Enter C */
> + LARG $a0, $t2, 1*PTRS
> + LARG $a1, $t2, 2*PTRS
> + move $a2, $t2
> + addi.d $a3, $sp, FRAME_LEN
> + move $a4, $sp
> +
> + bl ffi_closure_inner
> +
> + /* Return values. */
> +#if FLTS
> + FLARG $fa0, $sp, 0*FLTS
> + FLARG $fa1, $sp, 1*FLTS
> +#endif
> +
> + LARG $a0, $sp, 8*FLTS+0*PTRS
> + LARG $a1, $sp, 8*FLTS+1*PTRS
> +
> + /* Restore and return. */
> + LARG $ra, $sp, FRAME_LEN-1*PTRS
> + .cfi_restore 1
> + LARG $fp, $sp, FRAME_LEN-2*PTRS
> + .cfi_restore 22
> + addi.d $sp, $sp, FRAME_LEN
> + .cfi_def_cfa_offset 0
> + jr $ra
> + .cfi_endproc
> + .size ffi_go_closure_asm, .-ffi_go_closure_asm
> +
> +#if defined __ELF__ && defined __linux__
> + .section .note.GNU-stack,"",%progbits
> +#endif
>
--
Richard Biener <rguent...@suse.de>
SUSE Software Solutions Germany GmbH,
Frankenstrasse 146, 90461 Nuernberg, Germany;
GF: Ivo Totev, Andrew McDonald, Werner Knoblich; (HRB 36809, AG Nuernberg)
