163 lines
4.2 KiB
C
163 lines
4.2 KiB
C
/*
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* Generic thunking code to convert data between host and target CPU
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef THUNK_H
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#define THUNK_H
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#include <inttypes.h>
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#include "cpu.h"
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/* types enums definitions */
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typedef enum argtype {
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TYPE_NULL,
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TYPE_CHAR,
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TYPE_SHORT,
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TYPE_INT,
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TYPE_LONG,
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TYPE_ULONG,
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TYPE_PTRVOID, /* pointer on unknown data */
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TYPE_LONGLONG,
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TYPE_ULONGLONG,
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TYPE_PTR,
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TYPE_ARRAY,
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TYPE_STRUCT,
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} argtype;
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#define MK_PTR(type) TYPE_PTR, type
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#define MK_ARRAY(type, size) TYPE_ARRAY, size, type
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#define MK_STRUCT(id) TYPE_STRUCT, id
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#define THUNK_TARGET 0
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#define THUNK_HOST 1
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typedef struct {
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/* standard struct handling */
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const argtype *field_types;
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int nb_fields;
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int *field_offsets[2];
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/* special handling */
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void (*convert[2])(void *dst, const void *src);
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int size[2];
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int align[2];
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const char *name;
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} StructEntry;
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/* Translation table for bitmasks... */
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typedef struct bitmask_transtbl {
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unsigned int x86_mask;
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unsigned int x86_bits;
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unsigned int alpha_mask;
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unsigned int alpha_bits;
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} bitmask_transtbl;
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void thunk_register_struct(int id, const char *name, const argtype *types);
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void thunk_register_struct_direct(int id, const char *name,
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const StructEntry *se1);
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const argtype *thunk_convert(void *dst, const void *src,
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const argtype *type_ptr, int to_host);
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#ifndef NO_THUNK_TYPE_SIZE
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extern StructEntry struct_entries[];
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int thunk_type_size_array(const argtype *type_ptr, int is_host);
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int thunk_type_align_array(const argtype *type_ptr, int is_host);
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static inline int thunk_type_size(const argtype *type_ptr, int is_host)
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{
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int type, size;
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const StructEntry *se;
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type = *type_ptr;
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switch(type) {
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case TYPE_CHAR:
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return 1;
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case TYPE_SHORT:
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return 2;
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case TYPE_INT:
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return 4;
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case TYPE_LONGLONG:
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case TYPE_ULONGLONG:
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return 8;
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case TYPE_LONG:
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case TYPE_ULONG:
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case TYPE_PTRVOID:
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case TYPE_PTR:
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if (is_host) {
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return HOST_LONG_SIZE;
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} else {
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return TARGET_ABI_BITS / 8;
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}
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break;
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case TYPE_ARRAY:
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size = type_ptr[1];
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return size * thunk_type_size_array(type_ptr + 2, is_host);
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case TYPE_STRUCT:
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se = struct_entries + type_ptr[1];
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return se->size[is_host];
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default:
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return -1;
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}
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}
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static inline int thunk_type_align(const argtype *type_ptr, int is_host)
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{
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int type;
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const StructEntry *se;
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type = *type_ptr;
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switch(type) {
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case TYPE_CHAR:
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return 1;
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case TYPE_SHORT:
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return 2;
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case TYPE_INT:
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return 4;
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case TYPE_LONGLONG:
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case TYPE_ULONGLONG:
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return 8;
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case TYPE_LONG:
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case TYPE_ULONG:
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case TYPE_PTRVOID:
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case TYPE_PTR:
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if (is_host) {
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return HOST_LONG_SIZE;
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} else {
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return TARGET_ABI_BITS / 8;
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}
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break;
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case TYPE_ARRAY:
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return thunk_type_align_array(type_ptr + 2, is_host);
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case TYPE_STRUCT:
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se = struct_entries + type_ptr[1];
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return se->align[is_host];
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default:
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return -1;
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}
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}
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#endif /* NO_THUNK_TYPE_SIZE */
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unsigned int target_to_host_bitmask(unsigned int x86_mask,
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const bitmask_transtbl * trans_tbl);
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unsigned int host_to_target_bitmask(unsigned int alpha_mask,
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const bitmask_transtbl * trans_tbl);
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#endif
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