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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/wasm/module-decoder.h" | 5 #include "src/wasm/module-decoder.h" |
6 | 6 |
7 #include "src/base/functional.h" | 7 #include "src/base/functional.h" |
8 #include "src/base/platform/platform.h" | 8 #include "src/base/platform/platform.h" |
9 #include "src/flags.h" | 9 #include "src/flags.h" |
10 #include "src/macro-assembler.h" | 10 #include "src/macro-assembler.h" |
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1253 if (decoder.pc() != table_end) { | 1253 if (decoder.pc() != table_end) { |
1254 decoder.error("broken asm offset table"); | 1254 decoder.error("broken asm offset table"); |
1255 } | 1255 } |
1256 table.push_back(std::move(func_asm_offsets)); | 1256 table.push_back(std::move(func_asm_offsets)); |
1257 } | 1257 } |
1258 if (decoder.more()) decoder.error("unexpected additional bytes"); | 1258 if (decoder.more()) decoder.error("unexpected additional bytes"); |
1259 | 1259 |
1260 return decoder.toResult(std::move(table)); | 1260 return decoder.toResult(std::move(table)); |
1261 } | 1261 } |
1262 | 1262 |
| 1263 std::vector<CustomSectionOffset> DecodeCustomSections(const byte* start, |
| 1264 const byte* end) { |
| 1265 Decoder decoder(start, end); |
| 1266 decoder.consume_bytes(4, "wasm magic"); |
| 1267 decoder.consume_bytes(4, "wasm version"); |
| 1268 |
| 1269 std::vector<CustomSectionOffset> result; |
| 1270 |
| 1271 while (decoder.more()) { |
| 1272 byte section_code = decoder.consume_u8("section code"); |
| 1273 uint32_t section_length = decoder.consume_u32v("section length"); |
| 1274 uint32_t section_start = decoder.pc_offset(); |
| 1275 if (section_code != 0) { |
| 1276 // Skip known sections. |
| 1277 decoder.consume_bytes(section_length, "section bytes"); |
| 1278 continue; |
| 1279 } |
| 1280 uint32_t name_length = decoder.consume_u32v("name length"); |
| 1281 uint32_t name_offset = decoder.pc_offset(); |
| 1282 decoder.consume_bytes(name_length, "section name"); |
| 1283 uint32_t payload_offset = decoder.pc_offset(); |
| 1284 uint32_t payload_length = section_length - (payload_offset - section_start); |
| 1285 decoder.consume_bytes(payload_length); |
| 1286 result.push_back({section_start, name_offset, name_length, payload_offset, |
| 1287 payload_length, section_length}); |
| 1288 } |
| 1289 |
| 1290 return result; |
| 1291 } |
| 1292 |
1263 } // namespace wasm | 1293 } // namespace wasm |
1264 } // namespace internal | 1294 } // namespace internal |
1265 } // namespace v8 | 1295 } // namespace v8 |
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