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-rw-r--r--src/java_raw_api.c356
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diff --git a/src/java_raw_api.c b/src/java_raw_api.c
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+/* -----------------------------------------------------------------------
+ java_raw_api.c - Copyright (c) 1999, 2007, 2008 Red Hat, Inc.
+
+ Cloned from raw_api.c
+
+ Raw_api.c author: Kresten Krab Thorup <krab@gnu.org>
+ Java_raw_api.c author: Hans-J. Boehm <hboehm@hpl.hp.com>
+
+ $Id $
+
+ 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.
+ ----------------------------------------------------------------------- */
+
+/* This defines a Java- and 64-bit specific variant of the raw API. */
+/* It assumes that "raw" argument blocks look like Java stacks on a */
+/* 64-bit machine. Arguments that can be stored in a single stack */
+/* stack slots (longs, doubles) occupy 128 bits, but only the first */
+/* 64 bits are actually used. */
+
+#include <ffi.h>
+#include <ffi_common.h>
+#include <stdlib.h>
+
+#if !defined(NO_JAVA_RAW_API) && !defined(FFI_NO_RAW_API)
+
+size_t
+ffi_java_raw_size (ffi_cif *cif)
+{
+ size_t result = 0;
+ int i;
+
+ ffi_type **at = cif->arg_types;
+
+ for (i = cif->nargs-1; i >= 0; i--, at++)
+ {
+ switch((*at) -> type) {
+ case FFI_TYPE_UINT64:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_DOUBLE:
+ result += 2 * FFI_SIZEOF_JAVA_RAW;
+ break;
+ case FFI_TYPE_STRUCT:
+ /* No structure parameters in Java. */
+ abort();
+ default:
+ result += FFI_SIZEOF_JAVA_RAW;
+ }
+ }
+
+ return result;
+}
+
+
+void
+ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args)
+{
+ unsigned i;
+ ffi_type **tp = cif->arg_types;
+
+#if WORDS_BIGENDIAN
+
+ for (i = 0; i < cif->nargs; i++, tp++, args++)
+ {
+ switch ((*tp)->type)
+ {
+ case FFI_TYPE_UINT8:
+ case FFI_TYPE_SINT8:
+ *args = (void*) ((char*)(raw++) + 3);
+ break;
+
+ case FFI_TYPE_UINT16:
+ case FFI_TYPE_SINT16:
+ *args = (void*) ((char*)(raw++) + 2);
+ break;
+
+#if FFI_SIZEOF_JAVA_RAW == 8
+ case FFI_TYPE_UINT64:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_DOUBLE:
+ *args = (void *)raw;
+ raw += 2;
+ break;
+#endif
+
+ case FFI_TYPE_POINTER:
+ *args = (void*) &(raw++)->ptr;
+ break;
+
+ default:
+ *args = raw;
+ raw +=
+ ALIGN ((*tp)->size, sizeof(ffi_java_raw)) / sizeof(ffi_java_raw);
+ }
+ }
+
+#else /* WORDS_BIGENDIAN */
+
+#if !PDP
+
+ /* then assume little endian */
+ for (i = 0; i < cif->nargs; i++, tp++, args++)
+ {
+#if FFI_SIZEOF_JAVA_RAW == 8
+ switch((*tp)->type) {
+ case FFI_TYPE_UINT64:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_DOUBLE:
+ *args = (void*) raw;
+ raw += 2;
+ break;
+ default:
+ *args = (void*) raw++;
+ }
+#else /* FFI_SIZEOF_JAVA_RAW != 8 */
+ *args = (void*) raw;
+ raw +=
+ ALIGN ((*tp)->size, sizeof(ffi_java_raw)) / sizeof(ffi_java_raw);
+#endif /* FFI_SIZEOF_JAVA_RAW == 8 */
+ }
+
+#else
+#error "pdp endian not supported"
+#endif /* ! PDP */
+
+#endif /* WORDS_BIGENDIAN */
+}
+
+void
+ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw)
+{
+ unsigned i;
+ ffi_type **tp = cif->arg_types;
+
+ for (i = 0; i < cif->nargs; i++, tp++, args++)
+ {
+ switch ((*tp)->type)
+ {
+ case FFI_TYPE_UINT8:
+#if WORDS_BIGENDIAN
+ *(UINT32*)(raw++) = *(UINT8*) (*args);
+#else
+ (raw++)->uint = *(UINT8*) (*args);
+#endif
+ break;
+
+ case FFI_TYPE_SINT8:
+#if WORDS_BIGENDIAN
+ *(SINT32*)(raw++) = *(SINT8*) (*args);
+#else
+ (raw++)->sint = *(SINT8*) (*args);
+#endif
+ break;
+
+ case FFI_TYPE_UINT16:
+#if WORDS_BIGENDIAN
+ *(UINT32*)(raw++) = *(UINT16*) (*args);
+#else
+ (raw++)->uint = *(UINT16*) (*args);
+#endif
+ break;
+
+ case FFI_TYPE_SINT16:
+#if WORDS_BIGENDIAN
+ *(SINT32*)(raw++) = *(SINT16*) (*args);
+#else
+ (raw++)->sint = *(SINT16*) (*args);
+#endif
+ break;
+
+ case FFI_TYPE_UINT32:
+#if WORDS_BIGENDIAN
+ *(UINT32*)(raw++) = *(UINT32*) (*args);
+#else
+ (raw++)->uint = *(UINT32*) (*args);
+#endif
+ break;
+
+ case FFI_TYPE_SINT32:
+#if WORDS_BIGENDIAN
+ *(SINT32*)(raw++) = *(SINT32*) (*args);
+#else
+ (raw++)->sint = *(SINT32*) (*args);
+#endif
+ break;
+
+ case FFI_TYPE_FLOAT:
+ (raw++)->flt = *(FLOAT32*) (*args);
+ break;
+
+#if FFI_SIZEOF_JAVA_RAW == 8
+ case FFI_TYPE_UINT64:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_DOUBLE:
+ raw->uint = *(UINT64*) (*args);
+ raw += 2;
+ break;
+#endif
+
+ case FFI_TYPE_POINTER:
+ (raw++)->ptr = **(void***) args;
+ break;
+
+ default:
+#if FFI_SIZEOF_JAVA_RAW == 8
+ FFI_ASSERT(0); /* Should have covered all cases */
+#else
+ memcpy ((void*) raw->data, (void*)*args, (*tp)->size);
+ raw +=
+ ALIGN ((*tp)->size, sizeof(ffi_java_raw)) / sizeof(ffi_java_raw);
+#endif
+ }
+ }
+}
+
+#if !FFI_NATIVE_RAW_API
+
+static void
+ffi_java_rvalue_to_raw (ffi_cif *cif, void *rvalue)
+{
+#if WORDS_BIGENDIAN && FFI_SIZEOF_ARG == 8
+ switch (cif->rtype->type)
+ {
+ case FFI_TYPE_UINT8:
+ case FFI_TYPE_UINT16:
+ case FFI_TYPE_UINT32:
+ *(UINT64 *)rvalue <<= 32;
+ break;
+
+ case FFI_TYPE_SINT8:
+ case FFI_TYPE_SINT16:
+ case FFI_TYPE_SINT32:
+ case FFI_TYPE_INT:
+#if FFI_SIZEOF_JAVA_RAW == 4
+ case FFI_TYPE_POINTER:
+#endif
+ *(SINT64 *)rvalue <<= 32;
+ break;
+
+ default:
+ break;
+ }
+#endif
+}
+
+static void
+ffi_java_raw_to_rvalue (ffi_cif *cif, void *rvalue)
+{
+#if WORDS_BIGENDIAN && FFI_SIZEOF_ARG == 8
+ switch (cif->rtype->type)
+ {
+ case FFI_TYPE_UINT8:
+ case FFI_TYPE_UINT16:
+ case FFI_TYPE_UINT32:
+ *(UINT64 *)rvalue >>= 32;
+ break;
+
+ case FFI_TYPE_SINT8:
+ case FFI_TYPE_SINT16:
+ case FFI_TYPE_SINT32:
+ case FFI_TYPE_INT:
+ *(SINT64 *)rvalue >>= 32;
+ break;
+
+ default:
+ break;
+ }
+#endif
+}
+
+/* This is a generic definition of ffi_raw_call, to be used if the
+ * native system does not provide a machine-specific implementation.
+ * Having this, allows code to be written for the raw API, without
+ * the need for system-specific code to handle input in that format;
+ * these following couple of functions will handle the translation forth
+ * and back automatically. */
+
+void ffi_java_raw_call (ffi_cif *cif, void (*fn)(void), void *rvalue,
+ ffi_java_raw *raw)
+{
+ void **avalue = (void**) alloca (cif->nargs * sizeof (void*));
+ ffi_java_raw_to_ptrarray (cif, raw, avalue);
+ ffi_call (cif, fn, rvalue, avalue);
+ ffi_java_rvalue_to_raw (cif, rvalue);
+}
+
+#if FFI_CLOSURES /* base system provides closures */
+
+static void
+ffi_java_translate_args (ffi_cif *cif, void *rvalue,
+ void **avalue, void *user_data)
+{
+ ffi_java_raw *raw = (ffi_java_raw*)alloca (ffi_java_raw_size (cif));
+ ffi_raw_closure *cl = (ffi_raw_closure*)user_data;
+
+ ffi_java_ptrarray_to_raw (cif, avalue, raw);
+ (*cl->fun) (cif, rvalue, raw, cl->user_data);
+ ffi_java_raw_to_rvalue (cif, rvalue);
+}
+
+ffi_status
+ffi_prep_java_raw_closure_loc (ffi_java_raw_closure* cl,
+ ffi_cif *cif,
+ void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
+ void *user_data,
+ void *codeloc)
+{
+ ffi_status status;
+
+ status = ffi_prep_closure_loc ((ffi_closure*) cl,
+ cif,
+ &ffi_java_translate_args,
+ codeloc,
+ codeloc);
+ if (status == FFI_OK)
+ {
+ cl->fun = fun;
+ cl->user_data = user_data;
+ }
+
+ return status;
+}
+
+/* Again, here is the generic version of ffi_prep_raw_closure, which
+ * will install an intermediate "hub" for translation of arguments from
+ * the pointer-array format, to the raw format */
+
+ffi_status
+ffi_prep_java_raw_closure (ffi_java_raw_closure* cl,
+ ffi_cif *cif,
+ void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
+ void *user_data)
+{
+ return ffi_prep_java_raw_closure_loc (cl, cif, fun, user_data, cl);
+}
+
+#endif /* FFI_CLOSURES */
+#endif /* !FFI_NATIVE_RAW_API */
+#endif /* !FFI_NO_RAW_API */
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