+++ /dev/null
-/* -----------------------------------------------------------------------
- ffi.c - Copyright (c) 1998, 2001 Cygnus Solutions
-
- Alpha 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 CYGNUS SOLUTIONS 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>
-
-extern void ffi_call_osf(void *, unsigned long, unsigned, void *, void (*)());
-extern void ffi_closure_osf(void);
-
-
-ffi_status
-ffi_prep_cif_machdep(ffi_cif *cif)
-{
- /* Adjust cif->bytes to represent a minimum 6 words for the temporary
- register argument loading area. */
- if (cif->bytes < 6*SIZEOF_ARG)
- cif->bytes = 6*SIZEOF_ARG;
-
- /* Set the return type flag */
- switch (cif->rtype->type)
- {
- case FFI_TYPE_STRUCT:
- case FFI_TYPE_FLOAT:
- case FFI_TYPE_DOUBLE:
- cif->flags = cif->rtype->type;
- break;
-
- default:
- cif->flags = FFI_TYPE_INT;
- break;
- }
-
- return FFI_OK;
-}
-
-void
-ffi_call(ffi_cif *cif, void (*fn)(), void *rvalue, void **avalue)
-{
- unsigned long *stack, *argp;
- long i, avn;
- ffi_type **arg_types;
-
- FFI_ASSERT (cif->abi == FFI_OSF);
-
- /* If the return value is a struct and we don't have a return
- value address then we need to make one. */
- if (rvalue == NULL && cif->flags == FFI_TYPE_STRUCT)
- rvalue = alloca(cif->rtype->size);
-
- /* Allocate the space for the arguments, plus 4 words of temp
- space for ffi_call_osf. */
- argp = stack = alloca(cif->bytes + 4*SIZEOF_ARG);
-
- if (cif->flags == FFI_TYPE_STRUCT)
- *(void **) argp++ = rvalue;
-
- i = 0;
- avn = cif->nargs;
- arg_types = cif->arg_types;
-
- while (i < avn)
- {
- switch ((*arg_types)->type)
- {
- case FFI_TYPE_SINT8:
- *(SINT64 *) argp = *(SINT8 *)(* avalue);
- break;
-
- case FFI_TYPE_UINT8:
- *(SINT64 *) argp = *(UINT8 *)(* avalue);
- break;
-
- case FFI_TYPE_SINT16:
- *(SINT64 *) argp = *(SINT16 *)(* avalue);
- break;
-
- case FFI_TYPE_UINT16:
- *(SINT64 *) argp = *(UINT16 *)(* avalue);
- break;
-
- case FFI_TYPE_SINT32:
- case FFI_TYPE_UINT32:
- /* Note that unsigned 32-bit quantities are sign extended. */
- *(SINT64 *) argp = *(SINT32 *)(* avalue);
- break;
-
- case FFI_TYPE_SINT64:
- case FFI_TYPE_UINT64:
- case FFI_TYPE_POINTER:
- *(UINT64 *) argp = *(UINT64 *)(* avalue);
- break;
-
- case FFI_TYPE_FLOAT:
- if (argp - stack < 6)
- {
- /* Note the conversion -- all the fp regs are loaded as
- doubles. The in-register format is the same. */
- *(double *) argp = *(float *)(* avalue);
- }
- else
- *(float *) argp = *(float *)(* avalue);
- break;
-
- case FFI_TYPE_DOUBLE:
- *(double *) argp = *(double *)(* avalue);
- break;
-
- case FFI_TYPE_STRUCT:
- memcpy(argp, *avalue, (*arg_types)->size);
- break;
-
- default:
- FFI_ASSERT(0);
- }
-
- argp += ALIGN((*arg_types)->size, SIZEOF_ARG) / SIZEOF_ARG;
- i++, arg_types++, avalue++;
- }
-
- ffi_call_osf(stack, cif->bytes, cif->flags, rvalue, fn);
-}
-
-
-ffi_status
-ffi_prep_closure (ffi_closure* closure,
- ffi_cif* cif,
- void (*fun)(ffi_cif*, void*, void**, void*),
- void *user_data)
-{
- unsigned int *tramp;
-
- FFI_ASSERT (cif->abi == FFI_OSF);
-
- tramp = (unsigned int *) &closure->tramp[0];
- tramp[0] = 0x47fb0401; /* mov $27,$1 */
- tramp[1] = 0xa77b0010; /* ldq $27,16($27) */
- tramp[2] = 0x6bfb0000; /* jmp $31,($27),0 */
- tramp[3] = 0x47ff041f; /* nop */
- *(void **) &tramp[4] = ffi_closure_osf;
-
- closure->cif = cif;
- closure->fun = fun;
- closure->user_data = user_data;
-
- /* Flush the Icache.
-
- Tru64 UNIX as doesn't understand the imb mnemonic, so use call_pal
- instead, since both Compaq as and gas can handle it.
-
- 0x86 is PAL_imb in Tru64 UNIX <alpha/pal.h>. */
- asm volatile ("call_pal 0x86" : : : "memory");
-
- return FFI_OK;
-}
-
-int
-ffi_closure_osf_inner(ffi_closure *closure, void *rvalue, unsigned long *argp)
-{
- ffi_cif *cif;
- void **avalue;
- ffi_type **arg_types;
- long i, avn, argn;
-
- cif = closure->cif;
- avalue = alloca(cif->nargs * sizeof(void *));
-
- argn = 0;
-
- /* Copy the caller's structure return address to that the closure
- returns the data directly to the caller. */
- if (cif->flags == FFI_TYPE_STRUCT)
- {
- rvalue = (void *) argp[0];
- argn = 1;
- }
-
- i = 0;
- avn = cif->nargs;
- arg_types = cif->arg_types;
-
- /* Grab the addresses of the arguments from the stack frame. */
- while (i < avn)
- {
- switch (arg_types[i]->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_SINT64:
- case FFI_TYPE_UINT64:
- case FFI_TYPE_POINTER:
- case FFI_TYPE_STRUCT:
- avalue[i] = &argp[argn];
- break;
-
- case FFI_TYPE_FLOAT:
- if (argn < 6)
- {
- /* Floats coming from registers need conversion from double
- back to float format. */
- *(float *)&argp[argn - 6] = *(double *)&argp[argn - 6];
- avalue[i] = &argp[argn - 6];
- }
- else
- avalue[i] = &argp[argn];
- break;
-
- case FFI_TYPE_DOUBLE:
- avalue[i] = &argp[argn - (argn < 6 ? 6 : 0)];
- break;
-
- default:
- FFI_ASSERT(0);
- }
-
- argn += ALIGN(arg_types[i]->size, SIZEOF_ARG) / SIZEOF_ARG;
- i++;
- }
-
- /* Invoke the closure. */
- (closure->fun) (cif, rvalue, avalue, closure->user_data);
-
- /* Tell ffi_closure_osf how to perform return type promotions. */
- return cif->rtype->type;
-}
projects / msp430-gcc.git / blobdiff