From 06d05938cc828901703112b99740c2e90a392b88 Mon Sep 17 00:00:00 2001
From: Alexey Gavrilov <rebovas@yahoo.com>
Date: Tue, 8 Aug 2023 18:38:07 +0700
Subject: First commit

---
 kernel/boot.s    | 28 ++++++++++++++++++++++++++++
 kernel/kernel.c  |  4 ++++
 kernel/linker.ld | 28 ++++++++++++++++++++++++++++
 3 files changed, 60 insertions(+)
 create mode 100644 kernel/boot.s
 create mode 100644 kernel/kernel.c
 create mode 100644 kernel/linker.ld

(limited to 'kernel')

diff --git a/kernel/boot.s b/kernel/boot.s
new file mode 100644
index 0000000..2fd1c55
--- /dev/null
+++ b/kernel/boot.s
@@ -0,0 +1,28 @@
+MBALIGN equ 1 << 0
+MEMINFO equ 1 << 1
+MBFLAGS equ MBALIGN | MEMINFO
+MAGIC equ 0x1BADB002
+CHECKSUM equ -(MAGIC + MBFLAGS)
+
+section .multiboot
+align 4
+    dd MAGIC
+    dd MBFLAGS
+    dd CHECKSUM
+
+section .bss
+align 16
+stack_bottom:
+resb 16384
+stack_top:
+
+section .text
+global _start:function (_start.end - _start)
+_start:
+            mov esp, stack_top
+            extern main
+            call main
+            cli
+.hang:      hlt
+            jmp .hang
+.end:
diff --git a/kernel/kernel.c b/kernel/kernel.c
new file mode 100644
index 0000000..1d734c9
--- /dev/null
+++ b/kernel/kernel.c
@@ -0,0 +1,4 @@
+int main()
+{
+    return 0;
+};
diff --git a/kernel/linker.ld b/kernel/linker.ld
new file mode 100644
index 0000000..e490e6a
--- /dev/null
+++ b/kernel/linker.ld
@@ -0,0 +1,28 @@
+ENTRY(_start)
+
+SECTIONS
+{
+    . = 1M;
+
+    .text BLOCK(4K) : ALIGN(4K)
+    {
+        *.(.multiboot)
+        *(.text)
+    }
+
+    .rodata BLOCK(4K) : ALIGN(4k)
+    {
+        *(.rodata)
+    }
+
+    .data BLOCK(4K) : ALIGN(4K)
+    {
+        *(.data)
+    }
+
+    .bss BLOCK(4K) : ALIGN(4K)
+    {
+        *(COMMON)
+        *(.bss)
+    }
+}
-- 
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