From 9204e0dc00f16053c80986896aeb32f582fcb48e Mon Sep 17 00:00:00 2001
From: Nick Shipp <nick@shipp.ninja>
Date: Mon, 15 Mar 2021 15:55:35 -0400
Subject: The past

---
 bunny/Xargo.toml     |  2 --
 bunny/src/main.rs    | 45 ++++++++++++++++++++++++++++++++++++++++-----
 bunny/src/println.rs |  2 +-
 3 files changed, 41 insertions(+), 8 deletions(-)

diff --git a/bunny/Xargo.toml b/bunny/Xargo.toml
index c2a2569..e69de29 100644
--- a/bunny/Xargo.toml
+++ b/bunny/Xargo.toml
@@ -1,2 +0,0 @@
-[target.x86_64-pc-uefi.dependencies.alloc]
-features = []
diff --git a/bunny/src/main.rs b/bunny/src/main.rs
index cfb2f4a..4a3eb74 100644
--- a/bunny/src/main.rs
+++ b/bunny/src/main.rs
@@ -11,9 +11,11 @@ mod interrupt;
 mod lapic;
 mod io;
 mod inttraits;
+mod efifb;
 
 use core::ptr;
 use core::slice;
+use core::panic::PanicInfo;
 
 use uefi::prelude::*;
 use x86_64::instructions::interrupts;
@@ -23,6 +25,13 @@ use self::lapic::*;
 use self::inttraits::*;
 
 const NUM_CORES: u8 = 4;
+const RESOLUTION: (usize, usize) = (1920, 1080);
+
+static mut SYSTEM_TABLE: Option<&'static SystemTable> = None;
+
+pub(crate) fn system_table() -> &'static SystemTable {
+    SYSTEM_TABLE.expect("System table is missing!")
+}
 
 #[allow(improper_ctypes)]
 extern "C" {
@@ -50,15 +59,20 @@ pub extern fn efi_main(_handle: uefi::Handle, systab: &'static SystemTable) -> !
      */
     interrupts::disable();
 
-    /* Initialize UEFI boot services (logger, allocator) */
-    uefi_services::init(systab);
-
-    info!("FUZZY BUNNIES {}", env!("CARGO_PKG_VERSION"));
-    info!("efi_main @ 0x{:x}", efi_main as *const u8 as usize);
+    /* Save global reference to the system table */
+    SYSTEM_TABLE = Some(systab);
 
     /* Set up basic exception handlers */
     register_handlers();
 
+    /* Initialize early framebuffer */
+    efifb::init();
+
+    interrupts::enable();
+
+    info!("FUZZY BUNNIES {}", env!("CARGO_PKG_VERSION"));
+    info!("efi_main @ 0x{:x}", efi_main as *const u8 as usize);
+
     /* Set up AP bootstrap (real->long transition) code */
     let code = include_bytes!(concat!(env!("OUT_DIR"), "/ap_boot.bin"));
     let dest = unsafe {
@@ -90,6 +104,7 @@ pub extern fn efi_main(_handle: uefi::Handle, systab: &'static SystemTable) -> !
     }
 
     /* Disable the PICs to prepare for other cores */
+    interrupts::disable();
     unsafe {
         io::out::<u8>(io::PIC1_DATA, io::PIC_DISABLE);
         io::out::<u8>(io::PIC2_DATA, io::PIC_DISABLE);
@@ -131,3 +146,23 @@ pub extern fn efi_main(_handle: uefi::Handle, systab: &'static SystemTable) -> !
         unsafe { asm!("hlt"); }
     }
 }
+
+#[lang = "eh_personality"]
+#[no_mangle]
+pub extern fn eh_personality() { }
+
+#[no_mangle]
+#[panic_handler]
+pub extern fn panic_impl(pi: &PanicInfo) -> ! {
+    println!("!!! PANIC !!!");
+
+    if let Some(loc) = pi.location() {
+        println!("in file {}:{}:{}", loc.file(), loc.line(), loc.column());
+    }
+
+    if let Some(msg) = pi.message() {
+        println!("{}", msg);
+    }
+
+    loop {}
+}
diff --git a/bunny/src/println.rs b/bunny/src/println.rs
index 15f74de..761f974 100644
--- a/bunny/src/println.rs
+++ b/bunny/src/println.rs
@@ -2,7 +2,7 @@
 macro_rules! print {
     ($($arg:tt)*) => ({
         use core::fmt::Write;
-        uefi_services::system_table().stdout()
+        crate::system_table().stdout()
             .write_fmt(format_args!($($arg)*))
             .expect("could not write to console");
     });
-- 
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