Squash commits for public release

build/boot/x86/BUILD.gn

@@ -0,0 +1,20 @@
+if (target_arch == "x86") {
+  action("bootx86") {
+    script = "make_boot_drive.py"
+    sources = [
+      "$root_build_dir/stage1.bin",
+      "$root_build_dir/stage2.bin",
+    ]
+    outputs = [ "$root_build_dir/os-image.bin" ]
+    args = [
+      rebase_path("$root_build_dir/stage1.bin", root_build_dir),
+      rebase_path("$root_build_dir/stage2.bin", root_build_dir),
+      rebase_path("$root_build_dir/os-image.bin", root_build_dir),
+    ]
+
+    deps = [
+      "stage1:stage1",
+      "stage2:stage2",
+    ]
+  }
+}

build/boot/x86/boot_link.ld

@@ -0,0 +1,42 @@
+_pa_base = 0x1000;
+
+ENTRY(_pa_base)
+
+SECTIONS
+{
+	. = _pa_base;
+	bootloader_start = .;
+
+	.text ALIGN(4K) :
+	{
+		*(.xos_boot_text)
+		*(.text)
+		*(.text.*)
+	}
+
+	.rodata :
+	{
+		*(.rodata)
+		*(.rodata.*)
+	}
+
+	.data :
+	{
+		*(.data)
+		*(.data.*)
+	}
+
+	.bss :
+	{
+		*(.bss)
+		*(.bss.*)
+		*(COMMON)
+	}
+
+	.stack ALIGN(4K) :
+	{
+		STACK_PHYZ_BASE = .;
+		. += 0x1000;
+		STACK_PHYZ_TOP = .;
+	}
+}

build/boot/x86/make_boot_drive.py

@@ -0,0 +1,7 @@
+import sys
+inf = sys.argv[1]
+outf = sys.argv[2]
+reli = sys.argv[3]
+
+import subprocess
+output = subprocess.check_output("cat {0} {1} > {2}".format(inf, outf, reli), shell=True)

build/boot/x86/stage1/BUILD.gn

@@ -0,0 +1,21 @@
+action("stage1") {
+  script = "compile_stage1.py"
+  sources = [ "//boot/x86/stage1/boot.s" ]
+  outputs = [ "$root_build_dir/stage1.bin" ]
+
+  inputs = [
+    "//boot/x86/stage1/boot.s",
+    "//boot/x86/stage1/utils16/disk_load.s",
+    "//boot/x86/stage1/utils16/print.s",
+    "//boot/x86/stage1/utils16/smm.s",
+    "//boot/x86/stage1/utils16/switch_to_pm.s",
+    "//boot/x86/stage1/utils32/gdt.s",
+    "//boot/x86/stage1/utils32/print.s",
+  ]
+
+  args = [
+    rebase_path("//boot/x86/stage1/boot.s", root_build_dir),
+    rebase_path(root_build_dir, root_build_dir),
+    rebase_path("//", root_build_dir),
+  ]
+}

build/boot/x86/stage1/compile_stage1.py

@@ -0,0 +1,7 @@
+import sys
+inf = sys.argv[1]
+outf = sys.argv[2]
+reli = sys.argv[3]
+
+import subprocess
+output = subprocess.check_output("nasm {0} -f bin -i {2} -o {1}/stage1.bin".format(inf, outf, reli), shell=True)

build/boot/x86/stage2/BUILD.gn

@@ -0,0 +1,48 @@
+linker_script =
+    rebase_path("//build/boot/$target_arch/boot_link.ld", root_build_dir)
+
+executable("stage2") {
+  output_name = "stage2.bin"
+  sources = [
+    "//boot/libboot/crypto/sha256.c",
+    "//boot/libboot/crypto/signature.c",
+    "//boot/libboot/crypto/uint2048.c",
+    "//boot/libboot/crypto/validate.c",
+    "//boot/libboot/devtree/devtree.c",
+    "//boot/libboot/elf/elf_lite.c",
+    "//boot/libboot/fs/ext2_lite.c",
+    "//boot/libboot/log/log.c",
+    "//boot/libboot/mem/alloc.c",
+    "//boot/libboot/mem/mem.c",
+    "//boot/x86/stage2/drivers/ata.c",
+    "//boot/x86/stage2/drivers/port.c",
+    "//boot/x86/stage2/drivers/uart.c",
+    "//boot/x86/stage2/mem/vm.c",
+    "//boot/x86/stage2/stage2.c",
+    "//boot/x86/stage2/stage2_entry.s",
+  ]
+
+  include_dirs = [ "//boot" ]
+
+  ldflags = [
+    "-T$linker_script",
+    "--oformat",
+    "binary",
+    "-Map=stage2.map",
+  ]
+
+  cflags = [
+    "-ffreestanding",
+    "-Werror",
+    "-Wno-address-of-packed-member",
+    "-mno-80387",
+    "-mno-mmx",
+    "-mno-sse",
+    "-mno-sse2",
+  ]
+
+  asmflags = [
+    "-f",
+    "elf",
+  ]
+}