Add C header

include/protocol.h

@@ -0,0 +1,54 @@
+// TODO: cbindgen doesn't work lmao
+#pragma once
+#include <stdint.h>
+
+#define YB_CMDLINE_SIZE 256
+#define YB_KERNEL_MAGIC_V1  {0x07, 0xB0, 0x07, 0xB0, 0xA9, 0x97, 0xA1, 0x00}
+#define YB_LOADER_MAGIC_V1  {0x1A, 0x79, 0x9A, 0x0B, 0x70, 0x0B, 0x70, 0x00}
+
+#define YB_FLAG_VIDEO   (1 << 0)
+#define YB_FLAG_INITRD  (1 << 1)
+#define YB_FLAG_UPPER   (1 << 2)
+
+struct yb_header {
+    uint8_t kernel_magic[8];
+    uint8_t loader_magic[8];
+};
+
+enum yb_pixel_format {
+    YB_LFB_BGR32 = 0,
+    YB_LFB_RGB32,
+    YB_LFB_ANY,
+    YB_TEXT
+};
+
+struct yb_video_info {
+    uint32_t width, height;
+    uint32_t format;
+    uint64_t framebuffer, pitch;
+};
+
+struct yb_memory_map_info {
+    uint64_t address;
+    uint32_t size, entsize;
+};
+
+struct yb_elf_tables {
+    uint64_t symtab_hdr, symtab_data;
+    uint64_t strtab_hdr, strtab_data;
+};
+
+struct yb_proto_v1 {
+    struct yb_header hdr;
+    uint32_t flags;
+
+    struct yb_video_info video;
+    struct yb_memory_map_info memory_map;
+    struct yb_elf_tables elf_tables;
+
+    uint64_t initrd_base, initrd_size;
+
+    uint64_t rsdp;
+
+    char cmdline[YB_CMDLINE_SIZE];
+};

src/mmap.rs

@@ -1,3 +1,4 @@
+#[repr(C)]
 pub struct MemoryMapInfo {
     pub address:    u64,
     pub size:       u32,

src/video.rs

@@ -10,6 +10,7 @@ pub enum PixelFormat {
 }
 
 #[derive(Clone, Copy)]
+#[repr(C)]
 pub struct VideoInfo {
     pub width:          u32,
     pub height:         u32,