| 1 | /* |
| 2 | * Common Trace Format |
| 3 | * |
| 4 | * Integers read/write functions. |
| 5 | * |
| 6 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation |
| 7 | * |
| 8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 9 | * |
| 10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 11 | * of this software and associated documentation files (the "Software"), to deal |
| 12 | * in the Software without restriction, including without limitation the rights |
| 13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 14 | * copies of the Software, and to permit persons to whom the Software is |
| 15 | * furnished to do so, subject to the following conditions: |
| 16 | * |
| 17 | * The above copyright notice and this permission notice shall be included in |
| 18 | * all copies or substantial portions of the Software. |
| 19 | * |
| 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 26 | * SOFTWARE. |
| 27 | */ |
| 28 | |
| 29 | #include <babeltrace/ctf/types.h> |
| 30 | #include <babeltrace/bitfield.h> |
| 31 | #include <stdint.h> |
| 32 | #include <glib.h> |
| 33 | #include <babeltrace/endian.h> |
| 34 | |
| 35 | /* |
| 36 | * The aligned read/write functions are expected to be faster than the |
| 37 | * bitfield variants. They will be enabled eventually as an |
| 38 | * optimisation. |
| 39 | */ |
| 40 | |
| 41 | static |
| 42 | int _aligned_integer_read(struct bt_stream_pos *ppos, |
| 43 | struct bt_definition *definition) |
| 44 | { |
| 45 | struct definition_integer *integer_definition = |
| 46 | container_of(definition, struct definition_integer, p); |
| 47 | const struct declaration_integer *integer_declaration = |
| 48 | integer_definition->declaration; |
| 49 | struct ctf_stream_pos *pos = ctf_pos(ppos); |
| 50 | int rbo = (integer_declaration->byte_order != BYTE_ORDER); /* reverse byte order */ |
| 51 | |
| 52 | if (!ctf_align_pos(pos, integer_declaration->p.alignment)) |
| 53 | return -EFAULT; |
| 54 | |
| 55 | if (!ctf_pos_access_ok(pos, integer_declaration->len)) |
| 56 | return -EFAULT; |
| 57 | |
| 58 | assert(!(pos->offset % CHAR_BIT)); |
| 59 | if (!integer_declaration->signedness) { |
| 60 | switch (integer_declaration->len) { |
| 61 | case 8: |
| 62 | { |
| 63 | uint8_t v; |
| 64 | |
| 65 | memcpy(&v, ctf_get_pos_addr(pos), sizeof(v)); |
| 66 | integer_definition->value._unsigned = v; |
| 67 | break; |
| 68 | } |
| 69 | case 16: |
| 70 | { |
| 71 | uint16_t v; |
| 72 | |
| 73 | memcpy(&v, ctf_get_pos_addr(pos), sizeof(v)); |
| 74 | integer_definition->value._unsigned = |
| 75 | rbo ? GUINT16_SWAP_LE_BE(v) : v; |
| 76 | break; |
| 77 | } |
| 78 | case 32: |
| 79 | { |
| 80 | uint32_t v; |
| 81 | |
| 82 | memcpy(&v, ctf_get_pos_addr(pos), sizeof(v)); |
| 83 | integer_definition->value._unsigned = |
| 84 | rbo ? GUINT32_SWAP_LE_BE(v) : v; |
| 85 | break; |
| 86 | } |
| 87 | case 64: |
| 88 | { |
| 89 | uint64_t v; |
| 90 | |
| 91 | memcpy(&v, ctf_get_pos_addr(pos), sizeof(v)); |
| 92 | integer_definition->value._unsigned = |
| 93 | rbo ? GUINT64_SWAP_LE_BE(v) : v; |
| 94 | break; |
| 95 | } |
| 96 | default: |
| 97 | assert(0); |
| 98 | } |
| 99 | } else { |
| 100 | switch (integer_declaration->len) { |
| 101 | case 8: |
| 102 | { |
| 103 | int8_t v; |
| 104 | |
| 105 | memcpy(&v, ctf_get_pos_addr(pos), sizeof(v)); |
| 106 | integer_definition->value._signed = v; |
| 107 | break; |
| 108 | } |
| 109 | case 16: |
| 110 | { |
| 111 | int16_t v; |
| 112 | |
| 113 | memcpy(&v, ctf_get_pos_addr(pos), sizeof(v)); |
| 114 | integer_definition->value._signed = |
| 115 | rbo ? (int16_t) GUINT16_SWAP_LE_BE(v) : v; |
| 116 | break; |
| 117 | } |
| 118 | case 32: |
| 119 | { |
| 120 | int32_t v; |
| 121 | |
| 122 | memcpy(&v, ctf_get_pos_addr(pos), sizeof(v)); |
| 123 | integer_definition->value._signed = |
| 124 | rbo ? (int32_t) GUINT32_SWAP_LE_BE(v) : v; |
| 125 | break; |
| 126 | } |
| 127 | case 64: |
| 128 | { |
| 129 | int64_t v; |
| 130 | |
| 131 | memcpy(&v, ctf_get_pos_addr(pos), sizeof(v)); |
| 132 | integer_definition->value._signed = |
| 133 | rbo ? (int64_t) GUINT64_SWAP_LE_BE(v) : v; |
| 134 | break; |
| 135 | } |
| 136 | default: |
| 137 | assert(0); |
| 138 | } |
| 139 | } |
| 140 | if (!ctf_move_pos(pos, integer_declaration->len)) |
| 141 | return -EFAULT; |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | static |
| 146 | int _aligned_integer_write(struct bt_stream_pos *ppos, |
| 147 | struct bt_definition *definition) |
| 148 | { |
| 149 | struct definition_integer *integer_definition = |
| 150 | container_of(definition, struct definition_integer, p); |
| 151 | const struct declaration_integer *integer_declaration = |
| 152 | integer_definition->declaration; |
| 153 | struct ctf_stream_pos *pos = ctf_pos(ppos); |
| 154 | int rbo = (integer_declaration->byte_order != BYTE_ORDER); /* reverse byte order */ |
| 155 | |
| 156 | if (!ctf_align_pos(pos, integer_declaration->p.alignment)) |
| 157 | return -EFAULT; |
| 158 | |
| 159 | if (!ctf_pos_access_ok(pos, integer_declaration->len)) |
| 160 | return -EFAULT; |
| 161 | |
| 162 | assert(!(pos->offset % CHAR_BIT)); |
| 163 | if (pos->dummy) |
| 164 | goto end; |
| 165 | if (!integer_declaration->signedness) { |
| 166 | switch (integer_declaration->len) { |
| 167 | case 8: |
| 168 | { |
| 169 | uint8_t v = integer_definition->value._unsigned; |
| 170 | |
| 171 | memcpy(ctf_get_pos_addr(pos), &v, sizeof(v)); |
| 172 | break; |
| 173 | } |
| 174 | case 16: |
| 175 | { |
| 176 | uint16_t v = integer_definition->value._unsigned; |
| 177 | |
| 178 | if (rbo) |
| 179 | v = GUINT16_SWAP_LE_BE(v); |
| 180 | memcpy(ctf_get_pos_addr(pos), &v, sizeof(v)); |
| 181 | break; |
| 182 | } |
| 183 | case 32: |
| 184 | { |
| 185 | uint32_t v = integer_definition->value._unsigned; |
| 186 | |
| 187 | if (rbo) |
| 188 | v = GUINT32_SWAP_LE_BE(v); |
| 189 | memcpy(ctf_get_pos_addr(pos), &v, sizeof(v)); |
| 190 | break; |
| 191 | } |
| 192 | case 64: |
| 193 | { |
| 194 | uint64_t v = integer_definition->value._unsigned; |
| 195 | |
| 196 | if (rbo) |
| 197 | v = GUINT64_SWAP_LE_BE(v); |
| 198 | memcpy(ctf_get_pos_addr(pos), &v, sizeof(v)); |
| 199 | break; |
| 200 | } |
| 201 | default: |
| 202 | assert(0); |
| 203 | } |
| 204 | } else { |
| 205 | switch (integer_declaration->len) { |
| 206 | case 8: |
| 207 | { |
| 208 | uint8_t v = integer_definition->value._signed; |
| 209 | |
| 210 | memcpy(ctf_get_pos_addr(pos), &v, sizeof(v)); |
| 211 | break; |
| 212 | } |
| 213 | case 16: |
| 214 | { |
| 215 | int16_t v = integer_definition->value._signed; |
| 216 | |
| 217 | if (rbo) |
| 218 | v = GUINT16_SWAP_LE_BE(v); |
| 219 | memcpy(ctf_get_pos_addr(pos), &v, sizeof(v)); |
| 220 | break; |
| 221 | } |
| 222 | case 32: |
| 223 | { |
| 224 | int32_t v = integer_definition->value._signed; |
| 225 | |
| 226 | if (rbo) |
| 227 | v = GUINT32_SWAP_LE_BE(v); |
| 228 | memcpy(ctf_get_pos_addr(pos), &v, sizeof(v)); |
| 229 | break; |
| 230 | } |
| 231 | case 64: |
| 232 | { |
| 233 | int64_t v = integer_definition->value._signed; |
| 234 | |
| 235 | if (rbo) |
| 236 | v = GUINT64_SWAP_LE_BE(v); |
| 237 | memcpy(ctf_get_pos_addr(pos), &v, sizeof(v)); |
| 238 | break; |
| 239 | } |
| 240 | default: |
| 241 | assert(0); |
| 242 | } |
| 243 | } |
| 244 | end: |
| 245 | if (!ctf_move_pos(pos, integer_declaration->len)) |
| 246 | return -EFAULT; |
| 247 | return 0; |
| 248 | } |
| 249 | |
| 250 | int ctf_integer_read(struct bt_stream_pos *ppos, struct bt_definition *definition) |
| 251 | { |
| 252 | struct definition_integer *integer_definition = |
| 253 | container_of(definition, struct definition_integer, p); |
| 254 | const struct declaration_integer *integer_declaration = |
| 255 | integer_definition->declaration; |
| 256 | struct ctf_stream_pos *pos = ctf_pos(ppos); |
| 257 | |
| 258 | if (!(integer_declaration->p.alignment % CHAR_BIT) |
| 259 | && !(integer_declaration->len % CHAR_BIT)) { |
| 260 | return _aligned_integer_read(ppos, definition); |
| 261 | } |
| 262 | |
| 263 | if (!ctf_align_pos(pos, integer_declaration->p.alignment)) |
| 264 | return -EFAULT; |
| 265 | |
| 266 | if (!ctf_pos_access_ok(pos, integer_declaration->len)) |
| 267 | return -EFAULT; |
| 268 | |
| 269 | if (!integer_declaration->signedness) { |
| 270 | if (integer_declaration->byte_order == LITTLE_ENDIAN) |
| 271 | bt_bitfield_read_le(mmap_align_addr(pos->base_mma) + |
| 272 | pos->mmap_base_offset, unsigned char, |
| 273 | pos->offset, integer_declaration->len, |
| 274 | &integer_definition->value._unsigned); |
| 275 | else |
| 276 | bt_bitfield_read_be(mmap_align_addr(pos->base_mma) + |
| 277 | pos->mmap_base_offset, unsigned char, |
| 278 | pos->offset, integer_declaration->len, |
| 279 | &integer_definition->value._unsigned); |
| 280 | } else { |
| 281 | if (integer_declaration->byte_order == LITTLE_ENDIAN) |
| 282 | bt_bitfield_read_le(mmap_align_addr(pos->base_mma) + |
| 283 | pos->mmap_base_offset, unsigned char, |
| 284 | pos->offset, integer_declaration->len, |
| 285 | &integer_definition->value._signed); |
| 286 | else |
| 287 | bt_bitfield_read_be(mmap_align_addr(pos->base_mma) + |
| 288 | pos->mmap_base_offset, unsigned char, |
| 289 | pos->offset, integer_declaration->len, |
| 290 | &integer_definition->value._signed); |
| 291 | } |
| 292 | if (!ctf_move_pos(pos, integer_declaration->len)) |
| 293 | return -EFAULT; |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | int ctf_integer_write(struct bt_stream_pos *ppos, struct bt_definition *definition) |
| 298 | { |
| 299 | struct definition_integer *integer_definition = |
| 300 | container_of(definition, struct definition_integer, p); |
| 301 | const struct declaration_integer *integer_declaration = |
| 302 | integer_definition->declaration; |
| 303 | struct ctf_stream_pos *pos = ctf_pos(ppos); |
| 304 | |
| 305 | if (!(integer_declaration->p.alignment % CHAR_BIT) |
| 306 | && !(integer_declaration->len % CHAR_BIT)) { |
| 307 | return _aligned_integer_write(ppos, definition); |
| 308 | } |
| 309 | |
| 310 | if (!ctf_align_pos(pos, integer_declaration->p.alignment)) |
| 311 | return -EFAULT; |
| 312 | |
| 313 | if (!ctf_pos_access_ok(pos, integer_declaration->len)) |
| 314 | return -EFAULT; |
| 315 | |
| 316 | if (pos->dummy) |
| 317 | goto end; |
| 318 | if (!integer_declaration->signedness) { |
| 319 | if (integer_declaration->byte_order == LITTLE_ENDIAN) |
| 320 | bt_bitfield_write_le(mmap_align_addr(pos->base_mma) + |
| 321 | pos->mmap_base_offset, unsigned char, |
| 322 | pos->offset, integer_declaration->len, |
| 323 | integer_definition->value._unsigned); |
| 324 | else |
| 325 | bt_bitfield_write_be(mmap_align_addr(pos->base_mma) + |
| 326 | pos->mmap_base_offset, unsigned char, |
| 327 | pos->offset, integer_declaration->len, |
| 328 | integer_definition->value._unsigned); |
| 329 | } else { |
| 330 | if (integer_declaration->byte_order == LITTLE_ENDIAN) |
| 331 | bt_bitfield_write_le(mmap_align_addr(pos->base_mma) + |
| 332 | pos->mmap_base_offset, unsigned char, |
| 333 | pos->offset, integer_declaration->len, |
| 334 | integer_definition->value._signed); |
| 335 | else |
| 336 | bt_bitfield_write_be(mmap_align_addr(pos->base_mma) + |
| 337 | pos->mmap_base_offset, unsigned char, |
| 338 | pos->offset, integer_declaration->len, |
| 339 | integer_definition->value._signed); |
| 340 | } |
| 341 | end: |
| 342 | if (!ctf_move_pos(pos, integer_declaration->len)) |
| 343 | return -EFAULT; |
| 344 | return 0; |
| 345 | } |