Moved arm files
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green
183
libffi/arm/ffi.c
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183
libffi/arm/ffi.c
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/* -----------------------------------------------------------------------
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ffi.c - Copyright (c) 1998 Cygnus Solutions
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ARM 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 CYGNUS SOLUTIONS 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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/* ffi_prep_args is called by the assembly routine once stack space
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has been allocated for the function's arguments */
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/*@-exportheader@*/
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void ffi_prep_args(char *stack, extended_cif *ecif)
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/*@=exportheader@*/
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{
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register unsigned int i;
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register int tmp;
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register unsigned int avn;
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register void **p_argv;
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register char *argp;
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register ffi_type **p_arg;
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tmp = 0;
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argp = stack;
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if ( ecif->cif->rtype->type == FFI_TYPE_STRUCT ) {
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*(void **) argp = ecif->rvalue;
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argp += 4;
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}
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avn = ecif->cif->nargs;
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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) && (avn != 0);
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i--, p_arg++)
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{
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size_t z;
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/* Align if necessary */
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if (((*p_arg)->alignment - 1) & (unsigned) argp) {
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argp = (char *) ALIGN(argp, (*p_arg)->alignment);
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}
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if (avn != 0)
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{
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avn--;
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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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*(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv);
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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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memcpy(argp, *p_argv, z);
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}
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p_argv++;
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argp += z;
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}
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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 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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case FFI_TYPE_STRUCT:
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case FFI_TYPE_FLOAT:
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case FFI_TYPE_DOUBLE:
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cif->flags = (unsigned) cif->rtype->type;
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break;
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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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/*@-declundef@*/
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/*@-exportheader@*/
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extern void ffi_call_SYSV(void (*)(char *, extended_cif *),
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/*@out@*/ extended_cif *,
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unsigned, unsigned,
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/*@out@*/ unsigned *,
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void (*fn)());
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/*@=declundef@*/
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/*@=exportheader@*/
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void ffi_call(/*@dependent@*/ ffi_cif *cif,
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void (*fn)(),
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/*@out@*/ void *rvalue,
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/*@dependent@*/ 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 a return */
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/* value address then we need to make one */
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if ((rvalue == NULL) &&
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(cif->rtype->type == FFI_TYPE_STRUCT))
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{
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/*@-sysunrecog@*/
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ecif.rvalue = alloca(cif->rtype->size);
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/*@=sysunrecog@*/
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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_SYSV:
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/*@-usedef@*/
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ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes,
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cif->flags, ecif.rvalue, fn);
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/*@=usedef@*/
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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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