Initial commit

.gitignore

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+dist/
+build/
+sysroot/

Makefile

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+ifeq ($(BUILDROOT),)
+$(error BUILDROOT IS NOT SET!)
+endif
+
+SYSROOT := $(BUILDROOT)/sysroot
+
+DIST := $(BUILDROOT)/dist/mittos.iso
+
+$(DIST):
+	grub-mkrescue -o $@ $(SYSROOT)
+
+install: $(DIST)
+
+.PHONY: install

dbg

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+#!/usr/bin/env bash
+
+docker-compose -f toolchain/docker-compose.yml run --rm dbg "$@"

emu

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+#!/usr/bin/env bash
+
+docker-compose -f toolchain/docker-compose.yml run --rm --name emul emul "$@"

make

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+#!/usr/bin/env bash
+
+docker-compose -f toolchain/docker-compose.yml run --rm make "$@"

toolchain/Dockerfile.build

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+FROM alpine
+
+ADD build-toolchain.sh /opt/build-toolchain.sh
+
+RUN /opt/build-toolchain.sh
+
+ENV PATH "/opt/toolchain:$PATH"
+ENV MITTOS64 "true"
+ENV BUILDROOT "/opt"
+
+WORKDIR /opt

toolchain/Dockerfile.run

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+FROM alpine
+
+RUN apk --update --no-cache add qemu-system-x86_64 qemu-ui-curses gdb && rm -rf /var/cache/apk/*
+
+ENV MITTOS64 "true"
+ENV BUILDROOT "/opt"
+
+WORKDIR "/opt"

toolchain/build-toolchain.sh

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+#!/bin/sh -e
+
+apk --update add build-base
+apk add gmp-dev mpfr-dev mpc1-dev
+
+apk add make
+apk add grub-bios xorriso
+
+rm -rf /var/cache/apk/*
+
+target=x86_64-elf
+binutils=binutils-2.37
+gcc=gcc-11.2.0
+
+cd /opt
+wget http://ftp.gnu.org/gnu/binutils/${binutils}.tar.gz
+tar -xf ${binutils}.tar.gz
+mkdir binutils-build && cd binutils-build
+../${binutils}/configure \
+  --target=${target} \
+  --disable-nls \
+  --disable-werror \
+  --with-sysroot \
+
+make -j 4
+make install
+
+cd /opt
+wget http://ftp.gnu.org/gnu/gcc/${gcc}/${gcc}.tar.gz
+tar -xf ${gcc}.tar.gz
+mkdir gcc-build && cd gcc-build
+../${gcc}/configure \
+  --target=${target} \
+  --disable-nls \
+  --enable-languages=c \
+  --without-headers \
+
+make all-gcc all-target-libgcc -j 4
+make install-gcc install-target-libgcc
+
+apk del build-base
+
+cd /
+rm -rf /opt

toolchain/docker-compose.yml

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+version: "3.5"
+
+services:
+  make:
+    image: thomasloven/mittos-build
+    build:
+      context: .
+      dockerfile: Dockerfile.build
+    volumes:
+      - ..:/opt
+    command: make
+
+  emul:
+    image: thomasloven/mittos-run
+    build:
+      context: .
+      dockerfile: Dockerfile.run      
+    volumes:
+      - ..:/opt
+    command: qemu-system-x86_64 -s -S -cdrom /opt/dist/mittos.iso -curses
+  
+  dbg:
+    image: thomasloven/mittos-run
+    build:
+      context: .
+      dockerfile: Dockerfile.run
+    volumes:
+      - ..:/opt
+    command: gdb -q -x /opt/toolchain/gdbinit

toolchain/gdbinit

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+set prompt \033[31m(gdb) \033[0m
+set disassembly-flavor intel
+
+target remote emul:1234
+
+define q
+monitor quit
+end
+
+define reg
+monitor info registers
+end
+
+define reset
+monitor system_reset
+end