# Lang Assembly

> Assembly for hooks/shellcode/syscalls: x64/x86 calling conventions, trampolines, PIC, reverse engineering.

- Skill: `netvar1337/lang-assembly` (Agent Skill)
- Install (CLI): `npx skillmds@latest add netvar1337/lang-assembly`
- Raw SKILL.md: https://api.skillmd.com/api/skills/netvar1337/lang-assembly/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: GPL-3.0-or-later
- Author: netvar1337 (https://skillmd.com/u/netvar1337)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/netvar1337/lang-assembly

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# Assembly (x86/x64) for hooks & shellcode

## Must-know
- Windows x64 calling convention (RCX,RDX,R8,R9, stack shadow)
- RIP-relative addressing; PIC shellcode constraints
- Trampoline construction; register clobber lists
- Syscall stubs; wow64 transitions

## Workflow
1. Write in asm or compile C then carve
2. Validate disassembly in target context
3. Test under DEP/CFG/CET constraints

## Pair with
`assembly-reversal-engineering`, `stealth-injectors`, `zydis-disassembly-engineering` if present.