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1 | 31e31b8a | bellard | /*
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2 | 31e31b8a | bellard | * Generic thunking code to convert data between host and target CPU
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3 | 5fafdf24 | ths | *
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4 | 31e31b8a | bellard | * Copyright (c) 2003 Fabrice Bellard
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5 | 31e31b8a | bellard | *
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6 | 3ef693a0 | bellard | * This library is free software; you can redistribute it and/or
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7 | 3ef693a0 | bellard | * modify it under the terms of the GNU Lesser General Public
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8 | 3ef693a0 | bellard | * License as published by the Free Software Foundation; either
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9 | 3ef693a0 | bellard | * version 2 of the License, or (at your option) any later version.
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10 | 31e31b8a | bellard | *
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11 | 3ef693a0 | bellard | * This library is distributed in the hope that it will be useful,
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12 | 3ef693a0 | bellard | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 3ef693a0 | bellard | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 3ef693a0 | bellard | * Lesser General Public License for more details.
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15 | 31e31b8a | bellard | *
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16 | 3ef693a0 | bellard | * You should have received a copy of the GNU Lesser General Public
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17 | 3ef693a0 | bellard | * License along with this library; if not, write to the Free Software
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18 | 3ef693a0 | bellard | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19 | 31e31b8a | bellard | */
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20 | 31e31b8a | bellard | #include <stdlib.h> |
21 | 31e31b8a | bellard | #include <stdio.h> |
22 | 31e31b8a | bellard | #include <stdarg.h> |
23 | 31e31b8a | bellard | |
24 | 3ef693a0 | bellard | #include "qemu.h" |
25 | 31e31b8a | bellard | #include "thunk.h" |
26 | 31e31b8a | bellard | |
27 | 31e31b8a | bellard | //#define DEBUG
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28 | 31e31b8a | bellard | |
29 | 31e31b8a | bellard | #define MAX_STRUCTS 128 |
30 | 31e31b8a | bellard | |
31 | 31e31b8a | bellard | /* XXX: make it dynamic */
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32 | 24374901 | bellard | StructEntry struct_entries[MAX_STRUCTS]; |
33 | 31e31b8a | bellard | |
34 | 26553115 | j_mayer | static const argtype *thunk_type_next_ptr(const argtype *type_ptr); |
35 | 26553115 | j_mayer | |
36 | 31e31b8a | bellard | static inline const argtype *thunk_type_next(const argtype *type_ptr) |
37 | 31e31b8a | bellard | { |
38 | 31e31b8a | bellard | int type;
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39 | 31e31b8a | bellard | |
40 | 31e31b8a | bellard | type = *type_ptr++; |
41 | 31e31b8a | bellard | switch(type) {
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42 | 31e31b8a | bellard | case TYPE_CHAR:
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43 | 31e31b8a | bellard | case TYPE_SHORT:
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44 | 31e31b8a | bellard | case TYPE_INT:
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45 | 31e31b8a | bellard | case TYPE_LONGLONG:
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46 | 31e31b8a | bellard | case TYPE_ULONGLONG:
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47 | 31e31b8a | bellard | case TYPE_LONG:
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48 | 31e31b8a | bellard | case TYPE_ULONG:
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49 | 31e31b8a | bellard | case TYPE_PTRVOID:
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50 | 31e31b8a | bellard | return type_ptr;
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51 | 31e31b8a | bellard | case TYPE_PTR:
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52 | 26553115 | j_mayer | return thunk_type_next_ptr(type_ptr);
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53 | 31e31b8a | bellard | case TYPE_ARRAY:
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54 | 26553115 | j_mayer | return thunk_type_next_ptr(type_ptr + 1); |
55 | 31e31b8a | bellard | case TYPE_STRUCT:
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56 | 31e31b8a | bellard | return type_ptr + 1; |
57 | 31e31b8a | bellard | default:
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58 | 31e31b8a | bellard | return NULL; |
59 | 31e31b8a | bellard | } |
60 | 31e31b8a | bellard | } |
61 | 31e31b8a | bellard | |
62 | 26553115 | j_mayer | static const argtype *thunk_type_next_ptr(const argtype *type_ptr) |
63 | 26553115 | j_mayer | { |
64 | 26553115 | j_mayer | return thunk_type_next(type_ptr);
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65 | 26553115 | j_mayer | } |
66 | 26553115 | j_mayer | |
67 | 31e31b8a | bellard | void thunk_register_struct(int id, const char *name, const argtype *types) |
68 | 31e31b8a | bellard | { |
69 | 31e31b8a | bellard | const argtype *type_ptr;
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70 | 31e31b8a | bellard | StructEntry *se; |
71 | 31e31b8a | bellard | int nb_fields, offset, max_align, align, size, i, j;
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72 | 31e31b8a | bellard | |
73 | 31e31b8a | bellard | se = struct_entries + id; |
74 | 3b46e624 | ths | |
75 | 31e31b8a | bellard | /* first we count the number of fields */
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76 | 31e31b8a | bellard | type_ptr = types; |
77 | 31e31b8a | bellard | nb_fields = 0;
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78 | 31e31b8a | bellard | while (*type_ptr != TYPE_NULL) {
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79 | 31e31b8a | bellard | type_ptr = thunk_type_next(type_ptr); |
80 | 31e31b8a | bellard | nb_fields++; |
81 | 31e31b8a | bellard | } |
82 | 31e31b8a | bellard | se->field_types = types; |
83 | 31e31b8a | bellard | se->nb_fields = nb_fields; |
84 | 31e31b8a | bellard | se->name = name; |
85 | 31e31b8a | bellard | #ifdef DEBUG
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86 | 5fafdf24 | ths | printf("struct %s: id=%d nb_fields=%d\n",
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87 | 31e31b8a | bellard | se->name, id, se->nb_fields); |
88 | 31e31b8a | bellard | #endif
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89 | 31e31b8a | bellard | /* now we can alloc the data */
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90 | 31e31b8a | bellard | |
91 | 31e31b8a | bellard | for(i = 0;i < 2; i++) { |
92 | 31e31b8a | bellard | offset = 0;
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93 | 31e31b8a | bellard | max_align = 1;
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94 | 31e31b8a | bellard | se->field_offsets[i] = malloc(nb_fields * sizeof(int)); |
95 | 31e31b8a | bellard | type_ptr = se->field_types; |
96 | 31e31b8a | bellard | for(j = 0;j < nb_fields; j++) { |
97 | 31e31b8a | bellard | size = thunk_type_size(type_ptr, i); |
98 | 31e31b8a | bellard | align = thunk_type_align(type_ptr, i); |
99 | 31e31b8a | bellard | offset = (offset + align - 1) & ~(align - 1); |
100 | 31e31b8a | bellard | se->field_offsets[i][j] = offset; |
101 | 31e31b8a | bellard | offset += size; |
102 | 31e31b8a | bellard | if (align > max_align)
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103 | 31e31b8a | bellard | max_align = align; |
104 | 24374901 | bellard | type_ptr = thunk_type_next(type_ptr); |
105 | 31e31b8a | bellard | } |
106 | 31e31b8a | bellard | offset = (offset + max_align - 1) & ~(max_align - 1); |
107 | 31e31b8a | bellard | se->size[i] = offset; |
108 | 31e31b8a | bellard | se->align[i] = max_align; |
109 | 31e31b8a | bellard | #ifdef DEBUG
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110 | 5fafdf24 | ths | printf("%s: size=%d align=%d\n",
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111 | 31e31b8a | bellard | i == THUNK_HOST ? "host" : "target", offset, max_align); |
112 | 31e31b8a | bellard | #endif
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113 | 31e31b8a | bellard | } |
114 | 31e31b8a | bellard | } |
115 | 31e31b8a | bellard | |
116 | 31e31b8a | bellard | void thunk_register_struct_direct(int id, const char *name, StructEntry *se1) |
117 | 31e31b8a | bellard | { |
118 | 31e31b8a | bellard | StructEntry *se; |
119 | 31e31b8a | bellard | se = struct_entries + id; |
120 | 31e31b8a | bellard | *se = *se1; |
121 | 31e31b8a | bellard | se->name = name; |
122 | 31e31b8a | bellard | } |
123 | 31e31b8a | bellard | |
124 | 31e31b8a | bellard | |
125 | 31e31b8a | bellard | /* now we can define the main conversion functions */
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126 | 5fafdf24 | ths | const argtype *thunk_convert(void *dst, const void *src, |
127 | 31e31b8a | bellard | const argtype *type_ptr, int to_host) |
128 | 31e31b8a | bellard | { |
129 | 31e31b8a | bellard | int type;
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130 | 31e31b8a | bellard | |
131 | 31e31b8a | bellard | type = *type_ptr++; |
132 | 31e31b8a | bellard | switch(type) {
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133 | 31e31b8a | bellard | case TYPE_CHAR:
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134 | 31e31b8a | bellard | *(uint8_t *)dst = *(uint8_t *)src; |
135 | 31e31b8a | bellard | break;
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136 | 31e31b8a | bellard | case TYPE_SHORT:
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137 | 31e31b8a | bellard | *(uint16_t *)dst = tswap16(*(uint16_t *)src); |
138 | 31e31b8a | bellard | break;
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139 | 31e31b8a | bellard | case TYPE_INT:
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140 | 31e31b8a | bellard | *(uint32_t *)dst = tswap32(*(uint32_t *)src); |
141 | 31e31b8a | bellard | break;
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142 | 31e31b8a | bellard | case TYPE_LONGLONG:
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143 | 31e31b8a | bellard | case TYPE_ULONGLONG:
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144 | 31e31b8a | bellard | *(uint64_t *)dst = tswap64(*(uint64_t *)src); |
145 | 31e31b8a | bellard | break;
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146 | 992f48a0 | blueswir1 | #if HOST_LONG_BITS == 32 && TARGET_ABI_BITS == 32 |
147 | 31e31b8a | bellard | case TYPE_LONG:
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148 | 31e31b8a | bellard | case TYPE_ULONG:
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149 | 31e31b8a | bellard | case TYPE_PTRVOID:
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150 | 31e31b8a | bellard | *(uint32_t *)dst = tswap32(*(uint32_t *)src); |
151 | 31e31b8a | bellard | break;
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152 | 992f48a0 | blueswir1 | #elif HOST_LONG_BITS == 64 && TARGET_ABI_BITS == 32 |
153 | 31e31b8a | bellard | case TYPE_LONG:
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154 | 31e31b8a | bellard | case TYPE_ULONG:
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155 | 31e31b8a | bellard | case TYPE_PTRVOID:
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156 | d0cd3b8d | bellard | if (to_host) {
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157 | 70499c98 | bellard | if (type == TYPE_LONG) {
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158 | 70499c98 | bellard | /* sign extension */
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159 | 70499c98 | bellard | *(uint64_t *)dst = (int32_t)tswap32(*(uint32_t *)src); |
160 | 70499c98 | bellard | } else {
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161 | 70499c98 | bellard | *(uint64_t *)dst = tswap32(*(uint32_t *)src); |
162 | 70499c98 | bellard | } |
163 | 31e31b8a | bellard | } else {
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164 | 31e31b8a | bellard | *(uint32_t *)dst = tswap32(*(uint64_t *)src & 0xffffffff);
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165 | 31e31b8a | bellard | } |
166 | 31e31b8a | bellard | break;
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167 | 70499c98 | bellard | #elif HOST_LONG_BITS == 64 && TARGET_ABI_BITS == 64 |
168 | 70499c98 | bellard | case TYPE_LONG:
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169 | 70499c98 | bellard | case TYPE_ULONG:
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170 | 70499c98 | bellard | case TYPE_PTRVOID:
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171 | 70499c98 | bellard | *(uint64_t *)dst = tswap64(*(uint64_t *)src); |
172 | 70499c98 | bellard | break;
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173 | 70499c98 | bellard | #elif HOST_LONG_BITS == 32 && TARGET_ABI_BITS == 64 |
174 | 70499c98 | bellard | case TYPE_LONG:
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175 | 70499c98 | bellard | case TYPE_ULONG:
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176 | 70499c98 | bellard | case TYPE_PTRVOID:
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177 | 70499c98 | bellard | if (to_host) {
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178 | 70499c98 | bellard | *(uint32_t *)dst = tswap64(*(uint64_t *)src); |
179 | 70499c98 | bellard | } else {
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180 | 70499c98 | bellard | if (type == TYPE_LONG) {
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181 | 70499c98 | bellard | /* sign extension */
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182 | 70499c98 | bellard | *(uint64_t *)dst = tswap64(*(int32_t *)src); |
183 | 70499c98 | bellard | } else {
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184 | 70499c98 | bellard | *(uint64_t *)dst = tswap64(*(uint32_t *)src); |
185 | 70499c98 | bellard | } |
186 | 70499c98 | bellard | } |
187 | 70499c98 | bellard | break;
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188 | 31e31b8a | bellard | #else
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189 | 64b3ab24 | bellard | #warning unsupported conversion
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190 | 31e31b8a | bellard | #endif
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191 | 31e31b8a | bellard | case TYPE_ARRAY:
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192 | 31e31b8a | bellard | { |
193 | 31e31b8a | bellard | int array_length, i, dst_size, src_size;
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194 | 31e31b8a | bellard | const uint8_t *s;
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195 | 31e31b8a | bellard | uint8_t *d; |
196 | 31e31b8a | bellard | |
197 | 31e31b8a | bellard | array_length = *type_ptr++; |
198 | 31e31b8a | bellard | dst_size = thunk_type_size(type_ptr, to_host); |
199 | 31e31b8a | bellard | src_size = thunk_type_size(type_ptr, 1 - to_host);
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200 | 31e31b8a | bellard | d = dst; |
201 | 31e31b8a | bellard | s = src; |
202 | 31e31b8a | bellard | for(i = 0;i < array_length; i++) { |
203 | 31e31b8a | bellard | thunk_convert(d, s, type_ptr, to_host); |
204 | 31e31b8a | bellard | d += dst_size; |
205 | 31e31b8a | bellard | s += src_size; |
206 | 31e31b8a | bellard | } |
207 | 31e31b8a | bellard | type_ptr = thunk_type_next(type_ptr); |
208 | 31e31b8a | bellard | } |
209 | 31e31b8a | bellard | break;
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210 | 31e31b8a | bellard | case TYPE_STRUCT:
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211 | 31e31b8a | bellard | { |
212 | 31e31b8a | bellard | int i;
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213 | 31e31b8a | bellard | const StructEntry *se;
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214 | 31e31b8a | bellard | const uint8_t *s;
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215 | 31e31b8a | bellard | uint8_t *d; |
216 | 31e31b8a | bellard | const argtype *field_types;
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217 | 31e31b8a | bellard | const int *dst_offsets, *src_offsets; |
218 | 3b46e624 | ths | |
219 | 31e31b8a | bellard | se = struct_entries + *type_ptr++; |
220 | 31e31b8a | bellard | if (se->convert[0] != NULL) { |
221 | 31e31b8a | bellard | /* specific conversion is needed */
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222 | 31e31b8a | bellard | (*se->convert[to_host])(dst, src); |
223 | 31e31b8a | bellard | } else {
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224 | 31e31b8a | bellard | /* standard struct conversion */
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225 | 31e31b8a | bellard | field_types = se->field_types; |
226 | 31e31b8a | bellard | dst_offsets = se->field_offsets[to_host]; |
227 | 31e31b8a | bellard | src_offsets = se->field_offsets[1 - to_host];
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228 | 31e31b8a | bellard | d = dst; |
229 | 31e31b8a | bellard | s = src; |
230 | 31e31b8a | bellard | for(i = 0;i < se->nb_fields; i++) { |
231 | 5fafdf24 | ths | field_types = thunk_convert(d + dst_offsets[i], |
232 | 5fafdf24 | ths | s + src_offsets[i], |
233 | 31e31b8a | bellard | field_types, to_host); |
234 | 31e31b8a | bellard | } |
235 | 31e31b8a | bellard | } |
236 | 31e31b8a | bellard | } |
237 | 31e31b8a | bellard | break;
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238 | 31e31b8a | bellard | default:
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239 | 31e31b8a | bellard | fprintf(stderr, "Invalid type 0x%x\n", type);
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240 | 31e31b8a | bellard | break;
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241 | 31e31b8a | bellard | } |
242 | 31e31b8a | bellard | return type_ptr;
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243 | 31e31b8a | bellard | } |
244 | 31e31b8a | bellard | |
245 | 31e31b8a | bellard | /* from em86 */
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246 | 31e31b8a | bellard | |
247 | 31e31b8a | bellard | /* Utility function: Table-driven functions to translate bitmasks
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248 | 31e31b8a | bellard | * between X86 and Alpha formats...
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249 | 31e31b8a | bellard | */
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250 | 5fafdf24 | ths | unsigned int target_to_host_bitmask(unsigned int x86_mask, |
251 | 31e31b8a | bellard | bitmask_transtbl * trans_tbl) |
252 | 31e31b8a | bellard | { |
253 | 31e31b8a | bellard | bitmask_transtbl * btp; |
254 | 31e31b8a | bellard | unsigned int alpha_mask = 0; |
255 | 31e31b8a | bellard | |
256 | 31e31b8a | bellard | for(btp = trans_tbl; btp->x86_mask && btp->alpha_mask; btp++) {
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257 | 31e31b8a | bellard | if((x86_mask & btp->x86_mask) == btp->x86_bits) {
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258 | 31e31b8a | bellard | alpha_mask |= btp->alpha_bits; |
259 | 31e31b8a | bellard | } |
260 | 31e31b8a | bellard | } |
261 | 31e31b8a | bellard | return(alpha_mask);
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262 | 31e31b8a | bellard | } |
263 | 31e31b8a | bellard | |
264 | 5fafdf24 | ths | unsigned int host_to_target_bitmask(unsigned int alpha_mask, |
265 | 31e31b8a | bellard | bitmask_transtbl * trans_tbl) |
266 | 31e31b8a | bellard | { |
267 | 31e31b8a | bellard | bitmask_transtbl * btp; |
268 | 31e31b8a | bellard | unsigned int x86_mask = 0; |
269 | 31e31b8a | bellard | |
270 | 31e31b8a | bellard | for(btp = trans_tbl; btp->x86_mask && btp->alpha_mask; btp++) {
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271 | 31e31b8a | bellard | if((alpha_mask & btp->alpha_mask) == btp->alpha_bits) {
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272 | 7a987127 | bellard | x86_mask |= btp->x86_bits; |
273 | 31e31b8a | bellard | } |
274 | 31e31b8a | bellard | } |
275 | 31e31b8a | bellard | return(x86_mask);
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276 | 31e31b8a | bellard | } |
277 | 26553115 | j_mayer | |
278 | 26553115 | j_mayer | #ifndef NO_THUNK_TYPE_SIZE
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279 | 26553115 | j_mayer | int thunk_type_size_array(const argtype *type_ptr, int is_host) |
280 | 26553115 | j_mayer | { |
281 | 26553115 | j_mayer | return thunk_type_size(type_ptr, is_host);
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282 | 26553115 | j_mayer | } |
283 | 26553115 | j_mayer | |
284 | 26553115 | j_mayer | int thunk_type_align_array(const argtype *type_ptr, int is_host) |
285 | 26553115 | j_mayer | { |
286 | 26553115 | j_mayer | return thunk_type_align(type_ptr, is_host);
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287 | 26553115 | j_mayer | } |
288 | 26553115 | j_mayer | #endif /* ndef NO_THUNK_TYPE_SIZE */ |