Ken Van Hoeylandt
a0b2ee7ebc
- Apps can be launched directly from file paths (including Files app support) - Added executable detection to identify unsupported or invalid binaries before launch. - App startup is now streamlined through separate registered-app and direct-execution interfaces. - Existing app launch points were migrated to the updated startup APIs.
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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#include <app/elf_check.h>
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#include <cstdio>
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#include <cstring>
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namespace {
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constexpr size_t ELF_HEADER_PREFIX_SIZE = 20; // e_ident[16] + e_type(2) + e_machine(2)
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constexpr uint8_t ELF_MAGIC[4] = { 0x7f, 'E', 'L', 'F' };
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uint16_t read_le16(const uint8_t* bytes) {
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return static_cast<uint16_t>(bytes[0] | (bytes[1] << 8));
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}
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} // namespace
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bool elf_check_file(const char* path, const struct ElfRequirements* requirements) {
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FILE* file = fopen(path, "rb");
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if (file == nullptr) {
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return false;
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}
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uint8_t header[ELF_HEADER_PREFIX_SIZE];
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size_t read = fread(header, 1, sizeof(header), file);
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fclose(file);
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if (read != sizeof(header)) {
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return false;
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}
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if (memcmp(header, ELF_MAGIC, sizeof(ELF_MAGIC)) != 0) {
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return false;
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}
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uint8_t elf_class = header[4]; // e_ident[EI_CLASS]
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uint8_t data = header[5]; // e_ident[EI_DATA]
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uint16_t type = read_le16(header + 16); // e_type
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uint16_t machine = read_le16(header + 18); // e_machine
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return elf_class == requirements->elf_class
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&& data == requirements->data
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&& type == requirements->type
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&& machine == requirements->machine;
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}
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