Dobin 0x11_MemoryLayout.pdf
Dobin 0x11_MemoryLayout.pdf
Dobin 0x11_MemoryLayout.pdf
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Kartei Details
| Karten | 9 |
|---|---|
| Sprache | English |
| Kategorie | Religion/Ethik |
| Stufe | Universität |
| Erstellt / Aktualisiert | 21.06.2019 / 21.06.2019 |
| Lizenzierung | Keine Angabe |
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What is the ELF format, and name 3 types.
Programs are stored in ELF files
ELF: Executable and Linkable Format
- Like COFF, PE (EXE), ....
ELF types:
- ET_EXEC: Executable File
- ET_REL: Relocatable File
- ET_DYN: Shared Object File
ELF "views"
- Sections
- Segments
Describe the ELF Format how is it structured?
Sturcture of ELF file from top to bottom:
- ELF Header
- Program Header Table (contains the location of sections)
- Sections (are contained in segments)
- Section Header Table (contains locationn of sections
In the ELF format what can be contained in the sections?
Sections:
- .text: Executable instructions
- .bss: Unitialized data (usualy the heap)
- .data: initialized data
- .rodata: Read-Only data
- .got: Global Offset Table
- .plt: Prcedure Linkage Table
- .init / .fini: initialiyation instructions ("glibc")
How is an ELF file loaded what is loaded into the stack, heap and code block?
.plt, .text, .init get written into code block
.got, .data, .bss is written into the heap
unalocated space is the stack.
