Add what to verify section#85
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DeanoBurrito merged 13 commits intomasterfrom Mar 25, 2024
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DeanoBurrito
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Mar 7, 2024
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| * The first thing we want to check is the Magic number, this is the `ELFMAG` part. It is expected to be the following values: `0x7f, 'E', 'L', 'F'`. Bytes 0 to 3. | ||
| * We need to check that the file class match with the one we are supporting. There are two possible classes: 64 and 32. Thi is byte 4 | ||
| * The data field indicates the bit numbering convetion, again this depends on the architecture used. It can be three values: None (0), LSB (1) and MSB (2). For example x86_64 architecture value is 1. This field is in the byte 5. |
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bit numbering convention is usually referred to as endianness (which end of the number comes first). X86_64 is little endian, so we want LSB (1).
| * The version field, byte 6, to be a valid elf it has to be set to 1 (EVCURRENT). | ||
| * The OS Abi and Abi version they identify the operating system together with the ABI to which the object is targeted and the version of the ABI to which the object is targeted, for now we can ignore them, the should be 0. | ||
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| Then from the other fields that needs validation (that area not in the `e_ident` field) are: |
| * The version field, byte 6, to be a valid elf it has to be set to 1 (EVCURRENT). | ||
| * The OS Abi and Abi version they identify the operating system together with the ABI to which the object is targeted and the version of the ABI to which the object is targeted, for now we can ignore them, the should be 0. | ||
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| Then from the other fields that needs validation (that area not in the `e_ident` field) are: |
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