From 848c0c6a3fcd3a05a2d8d5fbb3eb550bc423f807 Mon Sep 17 00:00:00 2001
From: Druid520 <r.ustydruid520@proton.me>
Date: Mon, 17 Aug 2026 10:47:46 -0700
Subject: ADD: charge basics stuff.

---
 cfg.ld      | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 mk.conf     | 23 +++++++++++++++++++++++
 mk/b.sh     |  9 +++++++++
 mk/c.sh     |  4 ++++
 src/main.c  |  6 ++++++
 src/note.s  |  9 +++++++++
 src/start.s | 17 +++++++++++++++++
 7 files changed, 123 insertions(+)
 create mode 100644 cfg.ld
 create mode 100644 mk.conf
 create mode 100644 mk/b.sh
 create mode 100644 mk/c.sh
 create mode 100644 src/main.c
 create mode 100644 src/note.s
 create mode 100644 src/start.s

diff --git a/cfg.ld b/cfg.ld
new file mode 100644
index 0000000..a4dc193
--- /dev/null
+++ b/cfg.ld
@@ -0,0 +1,55 @@
+OUTPUT_FORMAT("elf64-x86-64")
+OUTPUT_ARCH("i386:x86-64")
+ENTRY(_start)
+
+SECTIONS
+{ 
+	. = 0x100000; /* start at 1mb. */
+
+	.text : ALIGN(4K)
+	{
+		*(.text.startup)
+		*(.text)
+		*(.text.*)
+	}
+
+	.rodata : ALIGN(4K)
+	{
+		*(.rodata)
+		*(.rodata.*)
+	}
+
+	.data : ALIGN(4K)
+	{
+		*(.data)
+		*(.data.*)
+	}
+
+	.bss : ALIGN(4K)
+	{
+		*(.bss)
+		*(.bss.*)
+		*(COMMON)
+	}
+
+	.note.netbsd.ident : ALIGN(4)
+	{
+		*(.note.netbsd.ident)
+	}
+
+	/DISCARD/ :
+	{
+		*(.comment)
+		*(.eh_frame)
+		*(.eh_frame_hdr)
+		*(.debug_*)
+		*(.stab)
+		*(.stabstr)
+		*(.shstrtab)
+		*(.strtab)
+		*(.symtab)
+	}
+}
+
+PROVIDE(__stack = 0x400000);
+PROVIDE(_end = .);
diff --git a/mk.conf b/mk.conf
new file mode 100644
index 0000000..8f3ff1f
--- /dev/null
+++ b/mk.conf
@@ -0,0 +1,23 @@
+src="src"
+out="out"
+
+bin="$out/bin"
+bin_ln="bin"
+
+note_src="$src/note.s"
+note_bin="$out/note.o"
+start_src="$src/start.s"
+start_bin="$out/start.o"
+main_src="$src/main.c"
+main_bin="$out/main.o"
+
+ln="ln"
+as="as"
+ld="ld"
+ld_cfg="cfg.ld"
+cc="gcc"
+
+lnflgs="-sf"
+asflgs=""
+ldflgs="-O0 -static -no-pie -T $ld_cfg"
+ccflgs="-nostdlib -ffreestanding -fno-pie -fno-builtin -std=c99 -O0 -g0"
diff --git a/mk/b.sh b/mk/b.sh
new file mode 100644
index 0000000..d8b27d5
--- /dev/null
+++ b/mk/b.sh
@@ -0,0 +1,9 @@
+. ./mk.conf
+set -e
+
+mkdir $out
+$as $asflgs -o $note_bin $note_src
+$as $asflgs -o $start_bin $start_src
+$cc $ccflgs -o $main_bin -c $main_src
+$ld $ldflgs -o $bin $note_bin $start_bin $main_bin
+$ln $lnflgs $bin $bin_ln
diff --git a/mk/c.sh b/mk/c.sh
new file mode 100644
index 0000000..d637651
--- /dev/null
+++ b/mk/c.sh
@@ -0,0 +1,4 @@
+. ./mk.conf
+set -e
+
+rm -rf $out $bin_ln
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..83423bb
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,6 @@
+int main(int argc, char** argv);
+
+int main(int argc, char** argv)
+{
+	return 0;
+}
diff --git a/src/note.s b/src/note.s
new file mode 100644
index 0000000..a8b606e
--- /dev/null
+++ b/src/note.s
@@ -0,0 +1,9 @@
+.section .note.netbsd.ident, "a" # allocatable section.
+	.align 4
+	.int 7 # namesz = "NetBSD" = 7 bytes.
+	.int 4 # descsz = version = 4 bytes.
+	.int 1 # type = ELF_NOTE_TYPE_NETBSD_TAG.
+	.ascii "NetBSD" # name.
+	.byte 0 # null term for name.
+	.long 110000000 # desc = 11.0 (netbsd ver).
+	.align 4
diff --git a/src/start.s b/src/start.s
new file mode 100644
index 0000000..58efed0
--- /dev/null
+++ b/src/start.s
@@ -0,0 +1,17 @@
+.section .text
+.globl _start
+.type _start, @function
+_start:
+	xorq %rbp, %rbp # frame ptr (%rbp) = null. marks stack bottom.
+
+	movl (%rsp), %edi # argc = first 4 bytes of stack.
+	leaq 8(%rsp), %rsi # argv = address of first arg ptr.
+
+	call main # see main.c.
+
+	movl %eax, %edi # status = ret val.
+	movl $1, %eax # SYS_exit = 1.
+	syscall
+
+	.size _start, .-_start
+	hlt # if syscall fails hang.
-- 
cgit 1.4.1