From b04ee131851605e5a7d824f46c296520be2350d3 Mon Sep 17 00:00:00 2001
From: able <abl3theabove@gmail.com>
Date: Thu, 7 Sep 2023 14:31:31 -0500
Subject: [PATCH] Register dump on panic

---
 kernel/src/arch/x86_64/mod.rs | 76 +++++++++++++++++++++++++++++++++--
 1 file changed, 73 insertions(+), 3 deletions(-)

diff --git a/kernel/src/arch/x86_64/mod.rs b/kernel/src/arch/x86_64/mod.rs
index 9bce207..14c95ad 100644
--- a/kernel/src/arch/x86_64/mod.rs
+++ b/kernel/src/arch/x86_64/mod.rs
@@ -1,17 +1,19 @@
 use embedded_graphics::pixelcolor::Rgb888;
 
-use crate::{arch::x86_64::graphics::DISPLAY, bootmodules::BootModule};
-
+use {
+    crate::{arch::x86_64::graphics::DISPLAY, bootmodules::BootModule},
+    core::arch::asm,
+};
 pub mod memory;
 
 mod cpuid;
+mod device_info_collector;
 mod gdt;
 pub mod graphics;
 pub(crate) mod interrupts;
 pub mod logging;
 pub mod pci;
 pub mod virtio;
-mod device_info_collector;
 
 pub use {logging::log, memory::PAGE_SIZE};
 
@@ -192,3 +194,71 @@ pub fn hardware_random_u64() -> u64 {
 }
 
 pub fn get_edid() {}
+
+pub fn register_dump() {
+    let rax: u64;
+    let rbx: u64 = 0;
+    let rcx: u64;
+    let rdx: u64;
+    let si: u64;
+    let di: u64;
+
+    let r8: u64; // TODO: r8-r15
+    let r9: u64;
+    let r10: u64;
+    let r11: u64;
+    let r12: u64;
+    let r13: u64;
+    let r14: u64;
+    let r15: u64;
+
+    unsafe {
+        asm!("",
+        out("rax") rax,
+        out("rcx") rcx,
+        out("rdx") rdx,
+        out("si") si,
+        out("di") di,
+        out("r8") r8,
+        out("r9") r9,
+        out("r10") r10,
+        out("r11") r11,
+        out("r12") r12,
+        out("r13") r13,
+        out("r14") r14,
+        out("r15") r15,
+        )
+    };
+
+    log::error!(
+        "Kernel Panic!\r
+Register Dump\r
+    rax: {:#x}\r
+    rbx: {:#x}\r
+    rcx: {:#x}\r
+    rdx: {:#x}\r
+    si : {:#x}\r
+    di : {:#x}\r
+    r8 : {:#x}\r
+    r9 : {:#x}\r
+    r11: {:#x}\r
+    r12: {:#x}\r
+    r13: {:#x}\r
+    r14: {:#x}\r
+    r15: {:#x}\r
+",
+        rax,
+        rbx,
+        rcx,
+        rdx,
+        si,
+        di,
+        r8,
+        r9,
+        r11,
+        r12,
+        r13,
+        r14,
+        r15,
+    );
+}