30 lines
2.5 KiB
Markdown
30 lines
2.5 KiB
Markdown
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---
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title: "segment.h"
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summary: "definitions needed to parse the elf program/segment headers"
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---
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# `elf_segment_type_E` - enum
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- **Null** - Unused segment
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- **Load** - Segment that should be included into mappings
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- **Dynamic** - Segments of this type contain dynamic linking information
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- **Interpreter** - This holds a path to an interpreter
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- **Note** - These segments hold notes by the compiler / toolchain
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- **Program Header Table** - This points to the table that is holding the segment headers
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- **TLS** - This holds a Thread Local Storage template
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# `elf_segment_T` - struct
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| Name | Type | Description |
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|------------------|----------|-----------------------------------------------------------------------------------------------------------------------------------------------|
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| type | uint32_t | The segments type -> [elf_segment_type_E](https://nerdcult.net/projects/noxos/docs/codebase/drivers/elf/segment.h/#elf_segment_type_e---enum) |
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| flags | uint32_t | The segments flags (Read / Write / Execute) |
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| offset | uint64_t | The segments position in the elf file |
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| address_virtual | uint64_t | Where the segment should be mapped in the virtual address space |
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| address_physical | uint64_t | Not used in the `System V` ABI |
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| length_file | uint64_t | The segments size in the file |
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| length_memory | uint64_t | The size of the area that should be mapped for the segment |
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| align | uint64_t | The segments alignment (has to be a power of 2) |
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# `g_elf_segment_type_strings` - global variable
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An array of strings matching [elf_segment_type_E](https://nerdcult.net/projects/noxos/docs/codebase/drivers/elf/segment.h/#elf_segment_type_e---enum).
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