Unifico - Unified Address Space and Stack Layout

Development

Git Hooks

Git pre-commit hooks in this project are managed by pre-commit. Once you clone the repo locally, run pre-commit install to install the configured pre-commit hooks.

How to compile musl properly.

| LLVM Branch | musl Branch | Description | |-------------|-------------|-------------| | llvm-9.0.1 | unmodified | unmodified | | musl | unasl | modified |

LLVM CMake flags for Unifico

-DLLVM_UNIFICO_TABLEGEN_FEATURES="-DUNIFICO_GPR_CALLING_CONV; \
-DUNIFICO_FPR_CALLING_CONV; \
-DUNIFICO_REMAT_RULES; \
-DUNIFICO_REGALLOC_RULES; \
-DUNIFICO_REG_COST; \
-DUNIFICO_INSTR_EXTENSION; \
-DUNIFICO_CHEAP_MOVES; \
-DUNIFICO_AARCH64_TWOADDR;"

• Use llvm-config --unifico-flags to check which of these are enabled in the current build.
• The LLVM repo for Unifico is currently hosted at: https://github.com/blackgeorge-boom/llvm-unifico

How to build init and aligned binaries

• Assumes you use a local config file like common/nettuno.defs.mk.
• For init use the UNMODIFIED=1 flag during make invocation.
• This picks the right llvm and musl builds.
• Otherwise, just leave the UNMODIFIED undefined.

Python tools

• stack-ascii: Print an ascii representation of an arm/x86 assembly file.
• To install run:

pin install -e .