From 2b6c37afcd8e7827078f53a5610a906dfbc91cc9 Mon Sep 17 00:00:00 2001
From: Anton Midyukov <antohami@altlinux.org>
Date: Thu, 22 Apr 2021 18:44:52 +0700
Subject: [PATCH] grub, hdt: Add hdt support for grub-pc (memdisk + floppy
 image)

Note: syslinux --install needed /proc, so:
@$(call set,GLOBAL_HSH_PROC,1)

See-also: mkimage/doc/README.ru
---
 features.in/grub/cfg.in/90hdt_bios.cfg      |  6 +++++
 features.in/hdt/config.mk                   |  5 +++-
 features.in/hdt/stage1/scripts.d/10-hdt-img | 27 +++++++++++++++++++++
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 features.in/grub/cfg.in/90hdt_bios.cfg
 create mode 100755 features.in/hdt/stage1/scripts.d/10-hdt-img

diff --git a/features.in/grub/cfg.in/90hdt_bios.cfg b/features.in/grub/cfg.in/90hdt_bios.cfg
new file mode 100644
index 00000000..e78474c4
--- /dev/null
+++ b/features.in/grub/cfg.in/90hdt_bios.cfg
@@ -0,0 +1,6 @@
+if [ "$grub_platform" = "pc" ]; then
+  menuentry "Hardware Info" {
+    linux16 /boot/memdisk
+    initrd16 /boot/hdt.img
+  }
+fi
diff --git a/features.in/hdt/config.mk b/features.in/hdt/config.mk
index 1969eb02..be05678c 100644
--- a/features.in/hdt/config.mk
+++ b/features.in/hdt/config.mk
@@ -1,9 +1,12 @@
 # optimized out use/syslinux due to use/memtest
 ifeq (,$(filter-out i586 x86_64,$(ARCH)))
-use/hdt: use/memtest
+use/hdt: use/syslinux use/memtest
 	@$(call add_feature)
 	@$(call add,STAGE1_PACKAGES,pciids)
+	@$(call add,STAGE1_PACKAGES,dosfstools)
 	@$(call add,SYSLINUX_MODULES,hdt)
+	@$(call add,GRUB_CFG,hdt_bios)
+	@$(call set,GLOBAL_HSH_PROC,1)
 else
 use/hdt: ; @:
 endif
diff --git a/features.in/hdt/stage1/scripts.d/10-hdt-img b/features.in/hdt/stage1/scripts.d/10-hdt-img
new file mode 100755
index 00000000..c4343649
--- /dev/null
+++ b/features.in/hdt/stage1/scripts.d/10-hdt-img
@@ -0,0 +1,27 @@
+#!/bin/sh -efu
+
+[ "$GLOBAL_BOOTLOADER" = grubpcboot ] || exit 0
+
+cd "$WORKDIR"
+
+mkdir -p boot syslinux
+cp /usr/lib/syslinux/hdt.c32 "$WORKDIR"/syslinux/
+
+cat > syslinux/syslinux.cfg << EOF
+default hdt
+label hdt
+  menu label ^Hardware info
+  com32 hdt.c32
+  append quiet
+EOF
+
+# floppy disk 720 KiB
+dd if=/dev/zero of=boot/hdt.img bs=512 count="1440"
+mkfs.fat -n HDT -F 12 boot/hdt.img
+mcopy -i boot/hdt.img -s syslinux ::
+
+#dd if=/usr/lib/syslinux/ldlinux.bss of=boot/hdt.img conv=notrunc
+syslinux -d /syslinux --install boot/hdt.img
+
+rm -r syslinux
+cp /usr/lib/syslinux/memdisk boot