scaffolding for the initrd: init can read files appended to it

currently this is just a text file, but it will be a tar archive later
on

2 files changed, 7 insertions, 0 deletions

diff --git a/src/init/linker.ld b/src/init/linker.ld
index efb44fd..f2c9d24 100644
--- a/src/init/linker.ld
+++ b/src/init/linker.ld
@@ -17,6 +17,10 @@ SECTIONS
 	{
 		*(.data)
 	}
+
+	_initrd = .; /* is just appended onto the end of the binary */
+	. += 2M;
+
 	_bss_start = .;
 	.bss BLOCK(4K) : ALIGN(4K)
 	{
diff --git a/src/init/main.c b/src/init/main.c
index 265379d..db94d4a 100644
--- a/src/init/main.c
+++ b/src/init/main.c
@@ -8,6 +8,7 @@
 
 extern char _bss_start; // provided by the linker
 extern char _bss_end;
+extern char _initrd;
 
 int tty_fd;
 
@@ -24,6 +25,8 @@ int main(void) {
 		_syscall_exit(argify("couldn't open tty"));
 
 	fs_test();
+
+	_syscall_write(tty_fd, &_initrd, 23);
 	_syscall_exit(argify("my job here is done."));
 }