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libffi: Backport of LoongArch support for libffi.

Browse Source 
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.

libffi/ChangeLog:

	PR libffi/108682
	* 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.
This commit is contained in:
Lulu Cheng 2023-08-22 19:56:21 +08:00
parent af3820d10d
commit 4beacf3cb8
6 changed files with 1058 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
libffi/Makefile.am
View File

@ -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)

25
libffi/Makefile.in
View File

@ -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 \

5
libffi/configure.host
View File

@ -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"

621
libffi/src/loongarch64/ffi.c Normal file
View File

@ -0,0 +1,621 @@
/* -----------------------------------------------------------------------
ffi.c - Copyright (c) 2022 Xu Chenghua <xuchenghua@loongson.cn>
2022 Cheng Lulu <chenglulu@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

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/* -----------------------------------------------------------------*-C-*-
ffitarget.h - Copyright (c) 2022 Xu Chenghua <xuchenghua@loongson.cn>
2022 Cheng Lulu <chenglulu@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

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/* -----------------------------------------------------------------------
sysv.S - Copyright (c) 2022 Xu Chenghua <xuchenghua@loongson.cn>
2022 Cheng Lulu <chenglulu@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