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v0.2.0 — SFX (self-extracting binary)

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@edwinjhlee edwinjhlee released this 26 Jun 12:38
v0.2.0
5b4e23f

v0.2.0 — SFX (self-extracting binary)

Major: upxz now produces self-extracting binaries (upxz -c <orig> <packed> → ./packed runs directly, self-contained, no external upxz needed).

  • Linux/Unix: SFX stub via memfd_create + fexecve — pure in-memory exec, no temp file.
  • macOS: three-part SFX (#!/bin/sh boot + no_std upxz-loader + app) — packed body unsigned (sh), loader codesign verified.
  • upxz-loader: no_std + zstd-sys FFI, 84KB (1/17.9 of full upxz) — passes <1/5 gate.
  • 2-tier zstd (default 19 / --fast 1) + -z N (1..19); flat upx-style CLI; argv passthrough.
  • Post-impl validation: ./packed runs (busybox echo / macli), 22+ tests.

Refs: mneme#41, upxz PR#5 (Linux memfd), #6 (macOS three-part).

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