From 59713279a0b08dcef801819c29f2883cd24060c6 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Fri, 29 Mar 2024 12:12:56 +0100
Subject: [PATCH] kernel: Add a hexdump() method to log binary data for
 debugging

---
 kernel/src/Log.cpp | 21 +++++++++++++++++++++
 kernel/src/Log.h   |  2 ++
 2 files changed, 23 insertions(+)

diff --git a/kernel/src/Log.cpp b/kernel/src/Log.cpp
index 34007c6a..17c8bd59 100644
--- a/kernel/src/Log.cpp
+++ b/kernel/src/Log.cpp
@@ -6,6 +6,7 @@
 #include <luna/Format.h>
 #include <luna/SourceLocation.h>
 #include <luna/Spinlock.h>
+#include <luna/StringBuilder.h>
 
 static bool g_debug_enabled = true;
 static bool g_serial_enabled = true;
@@ -174,3 +175,23 @@ static bool g_check_already_failed = false;
     }
     CPU::efficient_halt();
 }
+
+Result<void> hexdump(void* data, usize size)
+{
+    StringBuilder sb;
+
+    u8* ptr = (u8*)data;
+
+    while (size)
+    {
+        TRY(sb.format("%#2x ", *ptr));
+        ptr++;
+        size--;
+    }
+
+    auto message = TRY(sb.string());
+
+    kdbgln("hexdump: %s", message.chars());
+
+    return {};
+}
diff --git a/kernel/src/Log.h b/kernel/src/Log.h
index ac92b64b..0118bf1b 100644
--- a/kernel/src/Log.h
+++ b/kernel/src/Log.h
@@ -26,6 +26,8 @@ void set_text_console_initialized();
 #define kwarnln(...) log(LogLevel::Warn, __VA_ARGS__)
 #define kerrorln(...) log(LogLevel::Error, __VA_ARGS__)
 
+Result<void> hexdump(void* data, usize size);
+
 [[noreturn]] extern void __critical_error_handler(SourceLocation location, const char* expr, const char* failmsg,
                                                   const char* errmsg);