1 /*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "ecmascript/platform/elf.h"
17
18 #include "ecmascript/base/file_header.h"
19 #include "ecmascript/ecma_macros.h"
20 #include "securec.h"
21
22 namespace panda::ecmascript {
PackELFHeader(Elf64_Ehdr & header,uint32_t version,kungfu::Triple triple)23 void PackELFHeader(Elf64_Ehdr &header, uint32_t version, kungfu::Triple triple)
24 {
25 if (memset_s(reinterpret_cast<void *>(&header), sizeof(Elf64_Ehdr), 0, sizeof(Elf64_Ehdr)) != EOK) {
26 UNREACHABLE();
27 }
28 header.e_ident[EI_MAG0] = ELFMAG0;
29 header.e_ident[EI_MAG1] = ELFMAG1;
30 header.e_ident[EI_MAG2] = ELFMAG2;
31 header.e_ident[EI_MAG3] = ELFMAG3;
32 header.e_ident[EI_CLASS] = ELFCLASS64;
33 header.e_ident[EI_DATA] = ELFDATA2LSB;
34 header.e_ident[EI_VERSION] = 1;
35
36 header.e_type = ET_DYN;
37 switch (triple) {
38 case kungfu::Triple::TRIPLE_AMD64:
39 header.e_machine = EM_X86_64;
40 break;
41 case kungfu::Triple::TRIPLE_ARM32:
42 header.e_machine = EM_ARM;
43 break;
44 case kungfu::Triple::TRIPLE_AARCH64:
45 header.e_machine = EM_AARCH64;
46 break;
47 default:
48 UNREACHABLE();
49 break;
50 }
51 header.e_version = version;
52 }
53
VerifyELFHeader(const Elf64_Ehdr & header,uint32_t version,bool silent)54 bool VerifyELFHeader(const Elf64_Ehdr &header, uint32_t version, bool silent)
55 {
56 if (header.e_ident[EI_MAG0] != ELFMAG0 || header.e_ident[EI_MAG1] != ELFMAG1 ||
57 header.e_ident[EI_MAG2] != ELFMAG2 || header.e_ident[EI_MAG3] != ELFMAG3) {
58 if (!silent) {
59 LOG_ECMA(ERROR) << "ELF format error, expected magic is " << ELFMAG << ", but got "
60 << header.e_ident[EI_MAG0] << header.e_ident[EI_MAG1] << header.e_ident[EI_MAG2]
61 << header.e_ident[EI_MAG3];
62 }
63 return false;
64 }
65 if (!base::FileHeader::VerifyVersion("Elf ", header.e_version, version, silent)) {
66 return false;
67 }
68 return true;
69 }
70 } // namespace panda::ecmascript
71