267 lines
6.4 KiB
C
267 lines
6.4 KiB
C
/* -----------------------------------------------------------------------
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ffi.c - Copyright (c) 2013 Synopsys, Inc. (www.synopsys.com)
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ARC Foreign Function Interface
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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``Software''), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL RENESAS TECHNOLOGY BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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----------------------------------------------------------------------- */
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#include <ffi.h>
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#include <ffi_common.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <sys/cachectl.h>
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/* for little endian ARC, the code is in fact stored as mixed endian for
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performance reasons */
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#if __BIG_ENDIAN__
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#define CODE_ENDIAN(x) (x)
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#else
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#define CODE_ENDIAN(x) ( (((uint32_t) (x)) << 16) | (((uint32_t) (x)) >> 16))
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#endif
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/* ffi_prep_args is called by the assembly routine once stack
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space has been allocated for the function's arguments. */
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void
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ffi_prep_args (char *stack, extended_cif * ecif)
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{
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unsigned int i;
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void **p_argv;
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char *argp;
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ffi_type **p_arg;
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argp = stack;
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if (ecif->cif->rtype->type == FFI_TYPE_STRUCT)
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{
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*(void **) argp = ecif->rvalue;
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argp += 4;
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}
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p_argv = ecif->avalue;
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for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types;
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(i != 0); i--, p_arg++)
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{
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size_t z;
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int alignment;
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/* align alignment to 4 */
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alignment = (((*p_arg)->alignment - 1) | 3) + 1;
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/* Align if necessary. */
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if ((alignment - 1) & (unsigned) argp)
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argp = (char *) FFI_ALIGN (argp, alignment);
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z = (*p_arg)->size;
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if (z < sizeof (int))
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{
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z = sizeof (int);
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switch ((*p_arg)->type)
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{
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case FFI_TYPE_SINT8:
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*(signed int *) argp = (signed int) *(SINT8 *) (*p_argv);
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break;
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case FFI_TYPE_UINT8:
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*(unsigned int *) argp = (unsigned int) *(UINT8 *) (*p_argv);
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break;
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case FFI_TYPE_SINT16:
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*(signed int *) argp = (signed int) *(SINT16 *) (*p_argv);
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break;
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case FFI_TYPE_UINT16:
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*(unsigned int *) argp = (unsigned int) *(UINT16 *) (*p_argv);
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break;
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case FFI_TYPE_STRUCT:
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memcpy (argp, *p_argv, (*p_arg)->size);
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break;
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default:
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FFI_ASSERT (0);
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}
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}
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else if (z == sizeof (int))
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{
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*(unsigned int *) argp = (unsigned int) *(UINT32 *) (*p_argv);
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}
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else
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{
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if ((*p_arg)->type == FFI_TYPE_STRUCT)
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{
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memcpy (argp, *p_argv, z);
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}
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else
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{
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/* Double or long long 64bit. */
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memcpy (argp, *p_argv, z);
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}
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}
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p_argv++;
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argp += z;
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}
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return;
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}
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/* Perform machine dependent cif processing. */
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ffi_status
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ffi_prep_cif_machdep (ffi_cif * cif)
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{
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/* Set the return type flag. */
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switch (cif->rtype->type)
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{
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case FFI_TYPE_VOID:
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cif->flags = (unsigned) cif->rtype->type;
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break;
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case FFI_TYPE_STRUCT:
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cif->flags = (unsigned) cif->rtype->type;
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break;
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case FFI_TYPE_SINT64:
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case FFI_TYPE_UINT64:
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case FFI_TYPE_DOUBLE:
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cif->flags = FFI_TYPE_DOUBLE;
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break;
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case FFI_TYPE_FLOAT:
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default:
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cif->flags = FFI_TYPE_INT;
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break;
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}
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return FFI_OK;
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}
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extern void ffi_call_ARCompact (void (*)(char *, extended_cif *),
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extended_cif *, unsigned, unsigned,
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unsigned *, void (*fn) (void));
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void
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ffi_call (ffi_cif * cif, void (*fn) (void), void *rvalue, void **avalue)
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{
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extended_cif ecif;
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ecif.cif = cif;
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ecif.avalue = avalue;
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/* If the return value is a struct and we don't have
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a return value address then we need to make one. */
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if ((rvalue == NULL) && (cif->rtype->type == FFI_TYPE_STRUCT))
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{
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ecif.rvalue = alloca (cif->rtype->size);
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}
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else
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ecif.rvalue = rvalue;
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switch (cif->abi)
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{
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case FFI_ARCOMPACT:
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ffi_call_ARCompact (ffi_prep_args, &ecif, cif->bytes,
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cif->flags, ecif.rvalue, fn);
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break;
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default:
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FFI_ASSERT (0);
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break;
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}
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}
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int
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ffi_closure_inner_ARCompact (ffi_closure * closure, void *rvalue,
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ffi_arg * args)
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{
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void **arg_area, **p_argv;
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ffi_cif *cif = closure->cif;
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char *argp = (char *) args;
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ffi_type **p_argt;
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int i;
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arg_area = (void **) alloca (cif->nargs * sizeof (void *));
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/* handle hidden argument */
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if (cif->flags == FFI_TYPE_STRUCT)
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{
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rvalue = *(void **) argp;
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argp += 4;
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}
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p_argv = arg_area;
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for (i = 0, p_argt = cif->arg_types; i < cif->nargs;
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i++, p_argt++, p_argv++)
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{
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size_t z;
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int alignment;
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/* align alignment to 4 */
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alignment = (((*p_argt)->alignment - 1) | 3) + 1;
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/* Align if necessary. */
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if ((alignment - 1) & (unsigned) argp)
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argp = (char *) FFI_ALIGN (argp, alignment);
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z = (*p_argt)->size;
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*p_argv = (void *) argp;
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argp += z;
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}
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(closure->fun) (cif, rvalue, arg_area, closure->user_data);
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return cif->flags;
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}
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extern void ffi_closure_ARCompact (void);
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ffi_status
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ffi_prep_closure_loc (ffi_closure * closure, ffi_cif * cif,
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void (*fun) (ffi_cif *, void *, void **, void *),
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void *user_data, void *codeloc)
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{
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uint32_t *tramp = (uint32_t *) & (closure->tramp[0]);
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switch (cif->abi)
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{
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case FFI_ARCOMPACT:
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FFI_ASSERT (tramp == codeloc);
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tramp[0] = CODE_ENDIAN (0x200a1fc0); /* mov r8, pcl */
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tramp[1] = CODE_ENDIAN (0x20200f80); /* j [long imm] */
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tramp[2] = CODE_ENDIAN (ffi_closure_ARCompact);
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break;
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default:
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return FFI_BAD_ABI;
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}
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closure->cif = cif;
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closure->fun = fun;
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closure->user_data = user_data;
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cacheflush (codeloc, FFI_TRAMPOLINE_SIZE, BCACHE);
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return FFI_OK;
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}
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