From 50392995d6e7f3a10fb74bb2f9073a4790f8933c Mon Sep 17 00:00:00 2001
From: Jon Santmyer <jon@jonsantmyer.com>
Date: Mon, 11 Mar 2024 21:40:28 -0400
Subject: simple env with basic test init program

---
 initrd/Makefile               |  15 +++++++++++++++
 initrd/archive/init           | Bin 0 -> 4352 bytes
 initrd/programs/init/Makefile |   8 ++++++++
 initrd/programs/init/main.c   |   9 +++++++++
 4 files changed, 32 insertions(+)
 create mode 100644 initrd/Makefile
 create mode 100755 initrd/archive/init
 create mode 100644 initrd/programs/init/Makefile
 create mode 100644 initrd/programs/init/main.c

(limited to 'initrd')

diff --git a/initrd/Makefile b/initrd/Makefile
new file mode 100644
index 0000000..66f3753
--- /dev/null
+++ b/initrd/Makefile
@@ -0,0 +1,15 @@
+ARCHIVEDIR := archive
+PROGRAMSDIR := programs
+FILESDIR := files
+
+PROGRAMDIRS := $(wildcard $(PROGRAMSDIR)/*)
+PROGRAMBINS := $(patsubst $(PROGRAMSDIR)/%,$(ARCHIVEDIR)/%,$(PROGRAMDIRS))
+
+OUT = initrd.tar
+
+all: ${PROGRAMBINS}
+	tar -cf $(OUT) -C $(ARCHIVEDIR) .
+
+.PHONY: $(ARCHIVEDIR)/%
+$(ARCHIVEDIR)/% : $(PROGRAMSDIR)/%
+	$(MAKE) -C $< OUT=../../$@ ABIDIR=$(ABIDIR)
diff --git a/initrd/archive/init b/initrd/archive/init
new file mode 100755
index 0000000..44e70d6
Binary files /dev/null and b/initrd/archive/init differ
diff --git a/initrd/programs/init/Makefile b/initrd/programs/init/Makefile
new file mode 100644
index 0000000..3a283de
--- /dev/null
+++ b/initrd/programs/init/Makefile
@@ -0,0 +1,8 @@
+CFILES := $(wildcard *.c)
+OFILES := $(patsubst %.c,%.o,$(CFILES))
+
+all: ${OFILES}
+	$(CC) $< -o $(OUT) -lc
+
+%.o : %.c
+	$(CC) -I$(ABIDIR) -g $(CFLAGS) -c $< -o $@
diff --git a/initrd/programs/init/main.c b/initrd/programs/init/main.c
new file mode 100644
index 0000000..870ad28
--- /dev/null
+++ b/initrd/programs/init/main.c
@@ -0,0 +1,9 @@
+#include "syscall.h"
+
+int
+main(int argc, char *argv[])
+{
+    _syscall_log("Hello, Userland!\n");
+    for(;;);
+    return 0;
+}
-- 
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