sparc-linux-cross

This repository contains a Dockerfile for generating a sparc-linux-gnu cross-compiler suitable for building sparc and sparc32plus binaries, primarily for testing QEMU's qemu-sparc and qemu-sparc32plus user emulation.

The main issue as noted in the Dockerfile is that glibc has dropped support for sparcv8, which leaves the 32-bit default as sparcv8plus as used by the sparcv9 or the LEON cpu. The result of this is that a cross-compiler using an upstream glibc can generate binaries containing the cas instruction which is not available in sparcv8, causing an illegal instruction error to be generated when executed in QEMU's native qemu-sparc emulation.

The container image generated by this Dockerfile contains a sparc-linux-gnu cross-compiler that can be used to generate both sparcv8 and sparcv8plus binaries on an x86 host.

Example usage

• Generating an EM_SPARC binary for use with qemu-sparc

  podman run --rm -it -v $(pwd):/tmp ghcr.io/mcayland/sparc-linux-cross sparc-linux-gnu-gcc -o /tmp/test -static /tmp/catch-syscalls.c

• Generating an EM_SPARC32PLUS binary for use with qemu-sparc32plus

  podman run --rm -it -v $(pwd):/tmp ghcr.io/mcayland/sparc-linux-cross sparc-linux-gnu-gcc -mcpu=v9 -o /tmp/test -static /tmp/catch-syscalls.c