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Diffstat (limited to 'src/m32r/ffi.c')
| -rw-r--r-- | src/m32r/ffi.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/src/m32r/ffi.c b/src/m32r/ffi.c new file mode 100644 index 0000000..3000063 --- /dev/null +++ b/src/m32r/ffi.c @@ -0,0 +1,232 @@ +/* ----------------------------------------------------------------------- + ffi.c - Copyright (c) 2004 Renesas Technology + Copyright (c) 2008 Red Hat, Inc. + + M32R 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 RENESAS TECHNOLOGY 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> + +/* 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, extended_cif *ecif) +{ + unsigned int i; + int tmp; + unsigned int avn; + void **p_argv; + char *argp; + ffi_type **p_arg; + + tmp = 0; + argp = stack; + + if (ecif->cif->rtype->type == FFI_TYPE_STRUCT && ecif->cif->rtype->size > 8) + { + *(void **) argp = ecif->rvalue; + argp += 4; + } + + avn = ecif->cif->nargs; + p_argv = ecif->avalue; + + for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types; + (i != 0) && (avn != 0); + i--, p_arg++) + { + size_t z; + + /* Align if necessary. */ + if (((*p_arg)->alignment - 1) & (unsigned) argp) + argp = (char *) ALIGN (argp, (*p_arg)->alignment); + + if (avn != 0) + { + avn--; + z = (*p_arg)->size; + if (z < sizeof (int)) + { + z = sizeof (int); + + switch ((*p_arg)->type) + { + case FFI_TYPE_SINT8: + *(signed int *) argp = (signed int)*(SINT8 *)(* p_argv); + break; + + case FFI_TYPE_UINT8: + *(unsigned int *) argp = (unsigned int)*(UINT8 *)(* p_argv); + break; + + case FFI_TYPE_SINT16: + *(signed int *) argp = (signed int)*(SINT16 *)(* p_argv); + break; + + case FFI_TYPE_UINT16: + *(unsigned int *) argp = (unsigned int)*(UINT16 *)(* p_argv); + break; + + case FFI_TYPE_STRUCT: + z = (*p_arg)->size; + if ((*p_arg)->alignment != 1) + memcpy (argp, *p_argv, z); + else + memcpy (argp + 4 - z, *p_argv, z); + z = sizeof (int); + break; + + default: + FFI_ASSERT(0); + } + } + else if (z == sizeof (int)) + { + *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv); + } + else + { + if ((*p_arg)->type == FFI_TYPE_STRUCT) + { + if (z > 8) + { + *(unsigned int *) argp = (unsigned int)(void *)(* p_argv); + z = sizeof(void *); + } + else + { + memcpy(argp, *p_argv, z); + z = 8; + } + } + else + { + /* Double or long long 64bit. */ + memcpy (argp, *p_argv, z); + } + } + p_argv++; + argp += z; + } + } + + return; +} + +/* Perform machine dependent cif processing. */ +ffi_status +ffi_prep_cif_machdep(ffi_cif *cif) +{ + /* Set the return type flag. */ + switch (cif->rtype->type) + { + case FFI_TYPE_VOID: + cif->flags = (unsigned) cif->rtype->type; + break; + + case FFI_TYPE_STRUCT: + if (cif->rtype->size <= 4) + cif->flags = FFI_TYPE_INT; + + else if (cif->rtype->size <= 8) + cif->flags = FFI_TYPE_DOUBLE; + + else + cif->flags = (unsigned) cif->rtype->type; + break; + + case FFI_TYPE_SINT64: + case FFI_TYPE_UINT64: + case FFI_TYPE_DOUBLE: + cif->flags = FFI_TYPE_DOUBLE; + break; + + case FFI_TYPE_FLOAT: + default: + cif->flags = FFI_TYPE_INT; + break; + } + + return FFI_OK; +} + +extern void ffi_call_SYSV(void (*)(char *, extended_cif *), extended_cif *, + unsigned, unsigned, unsigned *, void (*fn)(void)); + +void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue) +{ + extended_cif ecif; + + ecif.cif = cif; + ecif.avalue = avalue; + + /* 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->rtype->type == FFI_TYPE_STRUCT)) + { + ecif.rvalue = alloca (cif->rtype->size); + } + else + ecif.rvalue = rvalue; + + switch (cif->abi) + { + case FFI_SYSV: + ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes, + cif->flags, ecif.rvalue, fn); + if (cif->rtype->type == FFI_TYPE_STRUCT) + { + int size = cif->rtype->size; + int align = cif->rtype->alignment; + + if (size < 4) + { + if (align == 1) + *(unsigned long *)(ecif.rvalue) <<= (4 - size) * 8; + } + else if (4 < size && size < 8) + { + if (align == 1) + { + memcpy (ecif.rvalue, ecif.rvalue + 8-size, size); + } + else if (align == 2) + { + if (size & 1) + size += 1; + + if (size != 8) + memcpy (ecif.rvalue, ecif.rvalue + 8-size, size); + } + } + } + break; + + default: + FFI_ASSERT(0); + break; + } +} |