kc3-lang/libffi

diff --git a/Makefile.am b/Makefile.am
index 563e9f2..0e66ee9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -74,7 +74,8 @@ noinst_HEADERS = \
 	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/dlmalloc.c								\
+	src/kvx/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 \
@@ -102,7 +103,8 @@ EXTRA_libffi_la_SOURCES = src/aarch64/ffi.c src/aarch64/sysv.S \
 	src/vax/ffi.c src/vax/elfbsd.S src/x86/ffi.c src/x86/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/xtensa/ffi.c src/xtensa/sysv.S \
+	src/kvx/ffi.c src/kvx/sysv.S
 
 TARGET_OBJ = @TARGET_OBJ@
 libffi_la_LIBADD = $(TARGET_OBJ)
diff --git a/README.md b/README.md
index 66c9186..4a2fa38 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,7 @@ tested:
 | AVR32           | Linux            | GCC                     |
 | Blackfin        | uClinux          | GCC                     |
 | HPPA            | HPUX             | GCC                     |
+| KVX             | Linux            | GCC                     |
 | IA-64           | Linux            | GCC                     |
 | M68K            | FreeMiNT         | GCC                     |
 | M68K            | Linux            | GCC                     |
diff --git a/configure.host b/configure.host
index 7c951a0..56c8036 100644
--- a/configure.host
+++ b/configure.host
@@ -136,6 +136,11 @@ case "${host}" in
 	SOURCES="ffi.c unix.S"
 	;;
 
+  kvx-*-*)
+	TARGET=KVX; TARGETDIR=kvx
+	SOURCES="ffi.c sysv.S"
+	;;
+
   m32r*-*-*)
 	TARGET=M32R; TARGETDIR=m32r
 	SOURCES="ffi.c sysv.S"
diff --git a/src/kvx/asm.h b/src/kvx/asm.h
new file mode 100644
index 0000000..4edba41
--- /dev/null
+++ b/src/kvx/asm.h
@@ -0,0 +1,5 @@
+/* args are passed on registers from r0 up to r11 => 12*8 bytes */
+#define REG_ARGS_SIZE (12*8)
+#define KVX_REGISTER_SIZE (8)
+#define KVX_ABI_SLOT_SIZE (KVX_REGISTER_SIZE)
+#define KVX_ABI_MAX_AGGREGATE_IN_REG_SIZE (4*KVX_ABI_SLOT_SIZE)
diff --git a/src/kvx/ffi.c b/src/kvx/ffi.c
new file mode 100644
index 0000000..58f6aef
--- /dev/null
+++ b/src/kvx/ffi.c
@@ -0,0 +1,273 @@
+/* Copyright (c) 2020 Kalray
+
+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.  */
+
+#if defined(__kvx__)
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <fficonfig.h>
+#include <ffi.h>
+#include "ffi_common.h"
+#include "asm.h"
+
+#define ALIGN(x, a) ALIGN_MASK(x, (typeof(x))(a) - 1)
+#define ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
+#define KVX_ABI_STACK_ALIGNMENT (32)
+#define KVX_ABI_STACK_ARG_ALIGNMENT (8)
+#define max(a,b) ((a) > (b) ? (a) : (b))
+
+#ifdef FFI_DEBUG
+#define DEBUG_PRINT(...) do{ fprintf( stderr, __VA_ARGS__ ); } while(0)
+#else
+#define DEBUG_PRINT(...)
+#endif
+
+struct ret_value {
+	unsigned long int r0;
+	unsigned long int r1;
+	unsigned long int r2;
+	unsigned long int r3;
+};
+
+extern struct ret_value ffi_call_SYSV(unsigned total_size,
+                                      unsigned size,
+                                      extended_cif *ecif,
+                                      unsigned *rvalue_addr,
+                                      void *fn,
+                                      unsigned int_ext_method);
+
+/* Perform machine dependent cif processing */
+ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
+{
+  cif->flags = cif->rtype->size;
+  return FFI_OK;
+}
+
+/* ffi_prep_args is called by the assembly routine once stack space
+   has been allocated for the function's arguments */
+
+void *ffi_prep_args(char *stack, unsigned int arg_slots_size, extended_cif *ecif)
+{
+  char *stacktemp = stack;
+  char *current_arg_passed_by_value = stack + arg_slots_size;
+  int i, s;
+  ffi_type **arg;
+  int count = 0;
+  ffi_cif *cif = ecif->cif;
+  void **argv = ecif->avalue;
+
+  arg = cif->arg_types;
+
+  DEBUG_PRINT("stack: %p\n", stack);
+  DEBUG_PRINT("arg_slots_size: %u\n", arg_slots_size);
+  DEBUG_PRINT("current_arg_passed_by_value: %p\n", current_arg_passed_by_value);
+  DEBUG_PRINT("ecif: %p\n", ecif);
+  DEBUG_PRINT("ecif->avalue: %p\n", ecif->avalue);
+
+  for (i = 0; i < cif->nargs; i++) {
+
+    s = KVX_ABI_SLOT_SIZE;
+    switch((*arg)->type) {
+      case FFI_TYPE_SINT8:
+      case FFI_TYPE_UINT8:
+      case FFI_TYPE_SINT16:
+      case FFI_TYPE_UINT16:
+      case FFI_TYPE_SINT32:
+      case FFI_TYPE_UINT32:
+      case FFI_TYPE_FLOAT:
+      case FFI_TYPE_DOUBLE:
+      case FFI_TYPE_UINT64:
+      case FFI_TYPE_SINT64:
+      case FFI_TYPE_POINTER:
+        DEBUG_PRINT("INT64/32/16/8/FLOAT/DOUBLE or POINTER @%p\n", stack);
+        *(uint64_t *) stack = *(uint64_t *)(* argv);
+        break;
+
+      case FFI_TYPE_COMPLEX:
+        if ((*arg)->size == 8)
+          *(_Complex float *) stack = *(_Complex float *)(* argv);
+        else if ((*arg)->size == 16) {
+          *(_Complex double *) stack = *(_Complex double *)(* argv);
+          s = 16;
+        } else
+          abort();
+        break;
+      case FFI_TYPE_STRUCT: {
+        char *value;
+        unsigned int written_size = 0;
+        DEBUG_PRINT("struct by value @%p\n", stack);
+        if ((*arg)->size > KVX_ABI_MAX_AGGREGATE_IN_REG_SIZE) {
+          DEBUG_PRINT("big struct\n");
+          *(uint64_t *) stack = (uintptr_t)current_arg_passed_by_value;
+          value = current_arg_passed_by_value;
+          current_arg_passed_by_value += (*arg)->size;
+          written_size = KVX_ABI_SLOT_SIZE;
+        } else {
+          value = stack;
+          written_size = (*arg)->size;
+        }
+        memcpy(value, *argv, (*arg)->size);
+        s = ALIGN(written_size, KVX_ABI_STACK_ARG_ALIGNMENT);
+        break;
+      }
+      default:
+        printf("Error: unsupported arg type %d\n", (*arg)->type);
+        abort();
+        break;
+
+    }
+    stack += s;
+    count += s;
+    argv++;
+    arg++;
+  }
+#ifdef FFI_DEBUG
+  FFI_ASSERT(((intptr_t)(stacktemp + REG_ARGS_SIZE) & (KVX_ABI_STACK_ALIGNMENT-1)) == 0);
+#endif
+  return stacktemp + REG_ARGS_SIZE;
+}
+
+/* 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->flags = cif->rtype->size;
+  return FFI_OK;
+}
+
+static unsigned long handle_small_int_ext(kvx_intext_method *int_ext_method,
+                                          const ffi_type *rtype)
+{
+  switch (rtype->type) {
+    case FFI_TYPE_SINT8:
+      *int_ext_method = KVX_RET_SXBD;
+      return KVX_REGISTER_SIZE;
+
+    case FFI_TYPE_SINT16:
+      *int_ext_method = KVX_RET_SXHD;
+      return KVX_REGISTER_SIZE;
+
+    case FFI_TYPE_SINT32:
+      *int_ext_method = KVX_RET_SXWD;
+      return KVX_REGISTER_SIZE;
+
+    case FFI_TYPE_UINT8:
+      *int_ext_method = KVX_RET_ZXBD;
+      return KVX_REGISTER_SIZE;
+
+    case FFI_TYPE_UINT16:
+      *int_ext_method = KVX_RET_ZXHD;
+      return KVX_REGISTER_SIZE;
+
+    case FFI_TYPE_UINT32:
+      *int_ext_method = KVX_RET_ZXWD;
+      return KVX_REGISTER_SIZE;
+
+    default:
+      *int_ext_method = KVX_RET_NONE;
+      return rtype->size;
+  }
+}
+
+void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
+{
+  int i;
+  unsigned long int slot_fitting_args_size = 0;
+  unsigned long int total_size = 0;
+  unsigned long int big_struct_size = 0;
+  kvx_intext_method int_extension_method;
+  ffi_type **arg;
+  struct ret_value local_rvalue = {0};
+  size_t wb_size;
+
+
+  /* Calculate size to allocate on stack */
+  for (i = 0, arg = cif->arg_types; i < cif->nargs; i++, arg++) {
+    DEBUG_PRINT("argument %d, type %d, size %lu\n", i, (*arg)->type, (*arg)->size);
+    if (((*arg)->type == FFI_TYPE_STRUCT) || ((*arg)->type == FFI_TYPE_COMPLEX)) {
+      if ((*arg)->size <= KVX_ABI_MAX_AGGREGATE_IN_REG_SIZE) {
+        slot_fitting_args_size += ALIGN((*arg)->size, KVX_ABI_SLOT_SIZE);
+      } else {
+        slot_fitting_args_size += KVX_ABI_SLOT_SIZE; /* aggregate passed by reference */
+        big_struct_size += ALIGN((*arg)->size, KVX_ABI_SLOT_SIZE);
+      }
+    } else if ((*arg)->size <= KVX_ABI_SLOT_SIZE) {
+      slot_fitting_args_size += KVX_ABI_SLOT_SIZE;
+    } else {
+      printf("Error: unsupported arg size %ld arg type %d\n", (*arg)->size, (*arg)->type);
+      abort(); /* should never happen? */
+    }
+  }
+
+  extended_cif ecif;
+  ecif.cif = cif;
+  ecif.avalue = avalue;
+  ecif.rvalue = rvalue;
+
+  /* This implementation allocates anyway for all register based args */
+  slot_fitting_args_size = max(slot_fitting_args_size, REG_ARGS_SIZE);
+  total_size = slot_fitting_args_size + big_struct_size;
+  total_size = ALIGN(total_size, KVX_ABI_STACK_ALIGNMENT);
+
+  /* wb_size: write back size, the size we will need to write back to user
+   * provided buffer. In theory it should always be cif->flags which is
+   * cif->rtype->size. But libffi API mandates that for integral types
+   * of size <= system register size, then we *MUST* write back
+   * the size of system register size.
+   * in our case, if size <= 8 bytes we must write back 8 bytes.
+   * floats, complex and structs are not affected, only integrals.
+   */
+  wb_size = handle_small_int_ext(&int_extension_method, cif->rtype);
+
+  switch (cif->abi) {
+    case FFI_SYSV:
+      DEBUG_PRINT("total_size: %lu\n", total_size);
+      DEBUG_PRINT("slot fitting args size: %lu\n", slot_fitting_args_size);
+      DEBUG_PRINT("rvalue: %p\n", rvalue);
+      DEBUG_PRINT("fn: %p\n", fn);
+      DEBUG_PRINT("rsize: %u\n", cif->flags);
+      DEBUG_PRINT("wb_size: %u\n", wb_size);
+      DEBUG_PRINT("int_extension_method: %u\n", int_extension_method);
+      local_rvalue = ffi_call_SYSV(total_size, slot_fitting_args_size,
+                                   &ecif, rvalue, fn, int_extension_method);
+      if ((cif->flags <= KVX_ABI_MAX_AGGREGATE_IN_REG_SIZE)
+          && (cif->rtype->type != FFI_TYPE_VOID))
+        memcpy(rvalue, &local_rvalue, wb_size);
+      break;
+    default:
+      abort();
+      break;
+  }
+}
+
+/* Closures not supported yet */
+ffi_status
+ffi_prep_closure_loc (ffi_closure* closure,
+                      ffi_cif* cif,
+                      void (*fun)(ffi_cif*,void*,void**,void*),
+                      void *user_data,
+                      void *codeloc)
+{
+  return FFI_BAD_ABI;
+}
+
+#endif /* (__kvx__) */
diff --git a/src/kvx/ffitarget.h b/src/kvx/ffitarget.h
new file mode 100644
index 0000000..8df8735
--- /dev/null
+++ b/src/kvx/ffitarget.h
@@ -0,0 +1,75 @@
+/* -----------------------------------------------------------------------
+   ffitarget.h - Copyright (c) 2020 Kalray
+
+   KVX Target configuration macros
+
+   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
+
+/* ---- System specific configurations ----------------------------------- */
+
+#ifndef LIBFFI_ASM
+typedef unsigned long          ffi_arg;
+typedef signed long            ffi_sarg;
+
+typedef enum ffi_abi {
+  FFI_FIRST_ABI = 0,
+  FFI_SYSV,
+  FFI_LAST_ABI,
+  FFI_DEFAULT_ABI = FFI_SYSV
+} ffi_abi;
+
+/* Those values are set depending on return type
+ * they are used in the assembly code in sysv.S
+ */
+typedef enum kvx_intext_method {
+  KVX_RET_NONE = 0,
+  KVX_RET_SXBD = 1,
+  KVX_RET_SXHD = 2,
+  KVX_RET_SXWD = 3,
+  KVX_RET_ZXBD = 4,
+  KVX_RET_ZXHD = 5,
+  KVX_RET_ZXWD = 6
+} kvx_intext_method;
+
+#endif
+
+/* ---- Definitions for closures ----------------------------------------- */
+
+/* This is only to allow Python to compile
+ * but closures are not supported yet
+ */
+#define FFI_CLOSURES 1
+#define FFI_TRAMPOLINE_SIZE 0
+
+#define FFI_NATIVE_RAW_API 0
+#define FFI_TARGET_SPECIFIC_VARIADIC 1
+#define FFI_TARGET_HAS_COMPLEX_TYPE
+
+#endif
+
diff --git a/src/kvx/sysv.S b/src/kvx/sysv.S
new file mode 100644
index 0000000..952afc7
--- /dev/null
+++ b/src/kvx/sysv.S
@@ -0,0 +1,127 @@
+/* Copyright (c) 2020 Kalray
+
+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.  */
+
+#if defined(__kvx__)
+#define LIBFFI_ASM
+#include <fficonfig.h>
+#include <ffi.h>
+#include <ffi_cfi.h>
+#include <kvx/asm.h>
+
+.text
+.global ffi_call_SYSV
+.type ffi_call_SYSV, @function
+.type ffi_prep_args, @function
+.align 8
+
+/* ffi_call_SYSV
+
+  r0: total size to allocate on stack
+  r1: size of arg slots
+  r2: extended cif structure, DO NOT REMOVE: it is used by ffi_prep_args()
+  r3: return value address
+  r4: function to call
+  r5: integer sign extension method to be used
+*/
+ffi_call_SYSV:
+	addd $r12 = $r12, -64
+	so (-32)[$r12] = $r20r21r22r23
+	;;
+	sd (0)[$r12] = $r24
+	;;
+	get $r23 = $ra
+	copyd $r20 = $r12
+	sbfd $r12 = $r0, $r12
+	;;
+	copyd $r0 = $r12
+	copyd $r21 = $r3
+	copyd $r22 = $r4
+	copyd $r24 = $r5
+	call ffi_prep_args
+	;;
+	lo $r8r9r10r11 = (64)[$r12]
+	;;
+	lo $r4r5r6r7 = (32)[$r12]
+	;;
+	lo $r0r1r2r3 = (0)[$r12]
+	copyd $r12 = $r0
+	/* $r15 is the register used by the ABI to return big (>32 bytes)
+	 * structs by value.
+	 * It is also referred to as the "struct register" in the ABI.
+	 */
+	copyd $r15 = $r21
+	icall $r22
+	;;
+	pcrel $r4 = @pcrel(.Ltable)
+	cb.deqz $r24 ? .Lend
+	;;
+	addx8d $r24 = $r24, $r4
+	;;
+	igoto $r24
+	;;
+.Ltable:
+0: /* we should never arrive here */
+	goto .Lerror
+	nop
+	;;
+1: /* Sign extend byte to double */
+	sxbd $r0 = $r0
+	goto .Lend
+	;;
+2: /* Sign extend half to double */
+	sxhd $r0 = $r0
+	goto .Lend
+	;;
+3: /* Sign extend word to double */
+	sxwd $r0 = $r0
+	goto .Lend
+	;;
+4: /* Zero extend byte to double */
+	zxbd $r0 = $r0
+	goto .Lend
+	;;
+5: /* Zero extend half to double */
+	zxhd $r0 = $r0
+	goto .Lend
+	;;
+6: /* Zero extend word to double */
+	zxwd $r0 = $r0
+	/* Fallthrough to .Lend */
+	;;
+.Lend:
+	ld $r24 = (0)[$r12]
+	;;
+	set $ra = $r23
+	lo $r20r21r22r23 = (32)[$r20]
+	addd $r12 = $r20, 64
+	;;
+	ret
+	;;
+.Lerror:
+	errop
+	;;
+
+#endif /* __kvx__ */
+
+#if defined __ELF__ && defined __linux__
+	.section .note.GNU-stack,"",%progbits
+#endif
+