From 9cc125fb3cfdc2c8ae7153b5ae0fe705980835fb Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Thu, 6 Jan 2022 23:39:12 +0200
Subject: Allow building with clang

+ Release mode is sort of broken, as lto doesn't work with linker
  relaxation and turning the relaxation off causes issues with the jump
  from init to kernel (as I've currently implemented it, could probably
  be fixed with a manual jump from assembly, I'll add it to my TODO
  list)
---
 arch/riscv64/conf/mkimage.sh | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100755 arch/riscv64/conf/mkimage.sh

(limited to 'arch/riscv64/conf/mkimage.sh')

diff --git a/arch/riscv64/conf/mkimage.sh b/arch/riscv64/conf/mkimage.sh
new file mode 100755
index 0000000..d097248
--- /dev/null
+++ b/arch/riscv64/conf/mkimage.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+if [ ! -e fs ]; then
+	mkdir fs
+fi
+
+if [ ! -e rootfs.img ]; then
+	virt-make-fs --partition=mbr --type=vfat --size=10M fs rootfs.img
+fi
+
+
+SSIZE=$(fdisk -l rootfs.img | awk '$1=="Units:" {print $8}')
+OFFSET=$(fdisk -l rootfs.img | awk '$1=="rootfs.img1" {print $2}')
+mount -o loop,offset=$((${SSIZE}*${OFFSET})) rootfs.img fs
+
+# not entirely pleased with this solution, although eventually I should probably
+# move `run` out of the kernel repo and into some `aposos` repo with a runtime
+# and proper initrd etc. so this is good enough for now
+../u-boot-apos/tools/mkimage -f arch/riscv64/conf/apos.its fs/apos.itb
+../u-boot-apos/tools/mkimage -A riscv -O apos -T script \
+	-d arch/riscv64/conf/boot.cmd fs/boot.scr
+
+umount -l fs
+
+qemu-system-riscv64 -machine virt \
+	-kernel ../u-boot-apos/u-boot \
+	-bios /usr/lib/riscv64-linux-gnu/opensbi/generic/fw_jump.elf \
+	-device virtio-blk-device,drive=hd0 \
+	-drive file=rootfs.img,format=raw,id=hd0 \
+	-S -s -m 2G \
+	-serial stdio
-- 
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