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https://github.com/harshkapadia2/assembly
Assembly language knowledgebase.
https://github.com/harshkapadia2/assembly
asm assembly
Last synced: 8 days ago
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Assembly language knowledgebase.
- Host: GitHub
- URL: https://github.com/harshkapadia2/assembly
- Owner: HarshKapadia2
- License: mit
- Created: 2023-10-07T17:10:10.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2023-10-16T06:52:12.000Z (over 1 year ago)
- Last Synced: 2024-10-11T11:26:21.146Z (4 months ago)
- Topics: asm, assembly
- Language: Assembly
- Homepage:
- Size: 6.84 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Assembly
- This repository is mainly about the x86 version of the Assembly language.
- Tutorial playlist: [Intro to x86 Assembly Language](https://www.youtube.com/watch?v=wLXIWKUWpSs&list=PLmxT2pVYo5LB5EzTPZGfFN0c2GDiSXgQe&index=1) (32-bit x86 Assembly)
- [Find Syscalls and which registers to use](https://chromium.googlesource.com/chromiumos/docs/+/HEAD/constants/syscalls.md)
- `man 2 ` can also be used to find the functions definition
of the Syscall.
## Compilation and Execution Instructions
```bash
# Use Netwide Assembler to compile assembly code to object file
$ nasm -f elf32 hello-world.asm -o hello-world.o
# Use GNU Linker to link object file and create an ELF (executable)
$ ld -m elf_i386 hello-world.o -o hello-world
# Execute the ELF
$ ./hello-world
```
## Register Sizes
- 8-bit
- `AH`, `AL`
- 16-bit
- `AX` (`AH:AL`)
- 32-bit
- `EAX`
- 64-bit
- `RAX`
## Data Sizes
- `db` or `byte`
- One byte
- `dw` or `word`
- One word, i.e., two bytes
- `dd` or `dword`
- Double word, i.e., four bytes
- `dq` or `qword`
- Quadruple word, i.e., eight bytes
## Useful Commands
- `file`
- `nm`
- `ldd`
- `objdump`
- `strace`
- `readelf`
- `gdb`
- `gf`
## Resources
- [Assembly Language in 100 Seconds](https://www.youtube.com/watch?v=4gwYkEK0gOk)
- [Intro to x86 Assembly Language](https://www.youtube.com/watch?v=wLXIWKUWpSs&list=PLmxT2pVYo5LB5EzTPZGfFN0c2GDiSXgQe&index=1) (32-bit x86 Assembly)
- [The faker's guide to reading (x86) assembly language](https://www.timdbg.com/posts/fakers-guide-to-assembly)
- [Some Assembly Required](https://github.com/hackclub/some-assembly-required)
- [x86 assembly doesn’t have to be scary (interactive)](https://blog.benjojo.co.uk/post/interactive-x86-bootloader-tutorial)
- [Web in Native Assembly (Linux x86_64)](https://www.youtube.com/watch?v=b-q4QBy52AA)
- [Brennan's Guide to Inline Assembly](https://delorie.com/djgpp/doc/brennan/brennan_att_inline_djgpp.html) (AT&T vs Intel syntax)
- [you can become a GALAXYBRAIN assembly programmers in 10 minutes](https://www.youtube.com/watch?v=6S5KRJv-7RU)
- [godbolt.org](https://godbolt.org)
- [Function calling in Assembly](https://flint.cs.yale.edu/cs421/papers/x86-asm/asm.html#calling) (Caller and Callee rules)
- [Difference between `.a`, `.s`, `.S` and `.asm`](https://stackoverflow.com/a/34098830/11958552)
- [Find Syscalls and which registers to use](https://chromium.googlesource.com/chromiumos/docs/+/HEAD/constants/syscalls.md)
- [ASCII Table](https://www.asciitable.com)
- [Is it possible to use 32 bits registers/instructions in real mode?](https://stackoverflow.com/questions/6917503/is-it-possible-to-use-32-bits-registers-instructions-in-real-mode)
- [In x86 what's difference between "test eax,eax" and "cmp eax,0"](https://stackoverflow.com/questions/39556649/in-x86-whats-difference-between-test-eax-eax-and-cmp-eax-0)
- [Netwide Assembler (NASM)](https://nasm.us)
- [NASM vs GAS](https://stackoverflow.com/questions/13793609/nasm-vs-gas-practical-differences)