CrunchBite: Fix typos and broken link

2026-04-01T03:06:38Z

Fix typos and broken link

Applesauce at 14:50, 18 April 2025

2025-04-18T14:50:20Z

Codeasm: Created page with "Only enabled in debug kernels, a Xbox with serial port can be kernel debugged with windbg. only executables that have debugging switched on can be debugged over serial aswell(..."

2017-07-16T16:17:58Z

Created page with "Only enabled in debug kernels, a Xbox with serial port can be kernel debugged with windbg. only executables that have debugging switched on can be debugged over serial aswell(..."

New page

Only enabled in debug kernels, a Xbox with serial port can be kernel debugged with windbg.
only executables that have debugging switched on can be debugged over serial aswell(?) {{citation needed}}
{FIXME| Explain with more details ;) }

Xqemu emulates this serial port, wich uses a [[Super_I/O | LPC chip ].

{FIXME| some example kernel output}

← Older revision		Revision as of 14:50, 18 April 2025
Line 5:		Line 5:
	Xqemu emulates this serial port, wich uses a [[Super_I/O \| LPC chip ].		Xqemu emulates this serial port, wich uses a [[Super_I/O \| LPC chip ].

−	{~~FIXME~~\| ~~some~~ example kernel ~~output~~}	+	== KD Commands ==
		+
		+	{\| class="wikitable"
		+	! Command
		+	! Description
		+	\|-
		+	\| <code>CTRL+B</code>
		+	\| Exit the kernel debugger.
		+	\|-
		+	\| <code><ENTER></code>
		+	\| Repeat the last command you entered.
		+	\|-
		+	\| <code>?</code>
		+	\| Display a quick reference of basic debugger commands.
		+	\|-
		+	\| <code>.help</code>
		+	\| List meta‑commands available in the debugger.
		+	\|-
		+	\| <code>!help</code>
		+	\| List the extension commands provided by debugger plugins.
		+	\|-
		+	\| <code>x MODULE!SYMBOL</code>
		+	\| Show symbols within a module (supports wildcards). e.g. <code>Vidya!*</code> lists all symbols starting with “Vidya”.
		+	\|-
		+	\| <code>db ADDRESS</code>
		+	\| Dump raw bytes at the specified address, with any printable ASCII alongside.
		+	\|-
		+	\| <code>dd ADDRESS</code>
		+	\| Dump memory as 32‑bit words starting at the given address.
		+	\|-
		+	\| <code>df ADDRESS</code>
		+	\| Dump memory as floating‑point values from the given address.
		+	\|-
		+	\| <code>dds ADDRESS</code>
		+	\| Dump 32‑bit words and resolve any that match symbol names—handy for spotting return addresses on the stack.
		+	\|-
		+	\| <code>dt TYPE ADDRESS</code>
		+	\| Display the fields of a structure type at a memory address. Add <code>-b</code> to recurse into nested structures.
		+	\|-
		+	\| <code>rM 54</code>
		+	\| Show FP/MMX/XMM register contents (note the uppercase “M”).
		+	\|-
		+	\| <code>rM 1fd</code>
		+	\| Show all CPU registers.
		+	\|-
		+	\| <code>p</code>
		+	\| Step over the next instruction (runs calls/interrupts without entering them).
		+	\|-
		+	\| <code>t</code>
		+	\| Step into the next instruction (enters calls and interrupts).
		+	\|-
		+	\| <code>bp ADDRESS</code>
		+	\| Set a breakpoint at the specified instruction address.
		+	\|-
		+	\| <code>bp ADDRESS "commands"</code>
		+	\| Create a breakpoint that executes a sequence of commands when hit (semicolon‑separated).
		+	\|-
		+	\| <code>ba w1 ADDRESS</code>
		+	\| Set a data breakpoint on writes to one byte at ADDRESS. Use “r” for reads, or “2”/“4” for word/dword sizes.
		+	\|-
		+	\| <code>bl</code>
		+	\| List all active breakpoints.
		+	\|-
		+	\| <code>bc INDEX</code>
		+	\| Clear the breakpoint with the given index (as shown by <code>bl</code>).
		+	\|-
		+	\| <code>!memusage</code>
		+	\| Display a summary of free memory pages and usage by category.
		+	\|-
		+	\| <code>!heap 0 -a</code>
		+	\| Dump detailed heap entries for all heaps (can generate a lot of output).
		+	\|-
		+	\| <code>!handle 0 7</code>
		+	\| List all open handles in the system (files, threads, etc.).
		+	\|-
		+	\| <code>!poolused 3</code>
		+	\| Report how pool memory is allocated across different tags.
		+	\|-
		+	\| <code>!poolfind TAG</code>
		+	\| List every pool allocation marked with the four‑character TAG.
		+	\|-
		+	\| <code>.reboot</code>
		+	\| Restart the console.
		+	\|-
		+	\| <code>.sympath</code>
		+	\| Show the current symbol search paths.
		+	\|-
		+	\| <code>.sympath PATH</code>
		+	\| Change the symbol path to PATH; use <code>.reload</code> to apply.
		+	\|-
		+	\| <code>.echotimestamps</code>
		+	\| Toggle timestamps on debug messages and break notifications.
		+	\|}
		+	{\| class="wikitable"
		+	! Command
		+	! Description
		+	\|-
		+	\| <code>r</code>
		+	\| Shows the current register values.
		+	\|-
		+	\| <code>kp</code>
		+	\| Displays the call stack with function parameters and line numbers. If <code>kp</code> isn’t supported in your debugger version, use <code>kb</code> instead.
		+	\|-
		+	\| <code>dd esp L80</code>
		+	\| Dumps raw stack memory as DWORDs starting at <code>esp</code> (the stack pointer). <code>L80</code> specifies length 0x80 (128 DWORDs), letting you inspect local variables on the stack.
		+	\|-
		+	\| <code>ln eip</code><br><code>u xxxxxxxx xxxxxxxx</code>
		+	\| Lists symbols around the current instruction pointer (<code>eip</code>) so you can see where the crash happened, for example:
		+	:<code>(00011050) YourGame!main+0x9</code><br>
		+	:<code>(0001109d) YourGame!DebugBreak.Next</code>
		+	Then use those addresses with <code>u</code> to disassemble that code range (e.g. <code>u 00011050 0001109d</code>).
		+	\|-
		+	\| <code>!process 0 7</code>
		+	\| Shows details about the current process and prints a call stack for each thread.
		+	\|-
		+	\| <code>dd nt!KeTickCount L1</code>
		+	\| Displays the kernel tick count (milliseconds since boot, excluding debugger pauses). Divide the result by 1,000 for seconds or by 3,600,000 for hours.
		+	\|}

@@ Line 1: / Line 1: @@
 Only enabled in debug kernels, a Xbox with serial port can be kernel debugged with windbg.
-only executables that have debugging switched on can be debugged over serial aswell(?) {{citation needed}}
+Only executable that have debugging switched on can be debugged over serial as well(?) {{citation needed}}
 {FIXME| Explain with more details ;) }
-Xqemu emulates this serial port, wich uses a [[Super_I/O | LPC chip ].
+XEMU emulates this serial port, which uses a [[Super_I/O]].
 == KD Commands ==

Kernel Debug - Revision history

CrunchBite: Fix typos and broken link

Applesauce at 14:50, 18 April 2025

Codeasm: Created page with "Only enabled in debug kernels, a Xbox with serial port can be kernel debugged with windbg. only executables that have debugging switched on can be debugged over serial aswell(..."