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249 lines
3.8 KiB
249 lines
3.8 KiB
4 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<HTML
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><HEAD
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><TITLE
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>Using Bochs and the remote GDB stub</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
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REL="HOME"
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TITLE="Bochs User Manual"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Tips and Techniques"
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HREF="howto.html"><LINK
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REL="PREVIOUS"
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TITLE="Using Bochs internal debugger"
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HREF="internal-debugger.html"><LINK
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REL="NEXT"
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TITLE="Using the serial port"
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HREF="serial-port.html"></HEAD
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><BODY
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CLASS="SECTION"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Bochs User Manual</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="internal-debugger.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 8. Tips and Techniques</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="serial-port.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECTION"
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><H1
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CLASS="SECTION"
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><A
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NAME="DEBUGGING-WITH-GDB"
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>8.12. Using Bochs and the remote GDB stub</A
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></H1
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><P
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>This section covers how you can use Bochs with a remote GDB stub to debug your kernel.</P
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><DIV
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CLASS="SECTION"
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><H2
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CLASS="SECTION"
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><A
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NAME="AEN3101"
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>8.12.1. Configuring Bochs</A
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></H2
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><P
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>The GDB stub is not active in standard Bochs binary package. So you must recompile Bochs.
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Download the Bochs source package, unpack it and run the configure script
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with the <B
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CLASS="COMMAND"
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>--enable-gdb-stub</B
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> argument.
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="SCREEN"
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> $ ./configure --enable-gdb-stub</PRE
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></TD
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></TR
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></TABLE
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>
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After that, just run make and you should have a Bochs binary that contain a GDB stub in your directory.</P
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></DIV
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><DIV
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CLASS="SECTION"
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><H2
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CLASS="SECTION"
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><A
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NAME="AEN3106"
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>8.12.2. Running Bochs</A
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></H2
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><P
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>Enable the <A
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HREF="bochsrc.html#BOCHSOPT-GDBSTUB"
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>gdbstub option</A
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> in <TT
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CLASS="FILENAME"
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>bochsrc</TT
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>, then just start Bochs as normal. Bochs will stop and wait for GDB to connect to the stub.</P
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></DIV
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><DIV
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CLASS="SECTION"
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><H2
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CLASS="SECTION"
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><A
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NAME="AEN3111"
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>8.12.3. Running GDB</A
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></H2
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><P
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>Bochs GDB stub waits for a connection on TCP port 1234. Just start GDB like this:
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="SCREEN"
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> $ gdb YOUR-KERNEL
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.
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.
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.
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(gdb) target remote localhost:1234
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Remote debugging using localhost:1234
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0x0000fff0 in ?? ()
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(gdb)</PRE
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></TD
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></TR
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></TABLE
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>
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You are now connected to the remote GDB stub in Bochs. You are now able to set breakpoints.
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Use the continue (c) command to continue the simulation.
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Hitting ^C works. Example:
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="SCREEN"
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> Program received signal 0, Signal 0.
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syscall_testsuite_result (aux=0x1f11fe4) at ../rtmk/syscalls.c:33
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33 {
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(gdb)</PRE
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></TD
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></TR
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></TABLE
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></P
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></DIV
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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|
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HREF="internal-debugger.html"
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|
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ACCESSKEY="P"
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|
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>Prev</A
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></TD
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|
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><TD
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|
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WIDTH="34%"
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|
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ALIGN="center"
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VALIGN="top"
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><A
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|
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HREF="index.html"
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|
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ACCESSKEY="H"
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>Home</A
|
||
|
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></TD
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|
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><TD
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||
|
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WIDTH="33%"
|
||
|
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ALIGN="right"
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VALIGN="top"
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><A
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|
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HREF="serial-port.html"
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|
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ACCESSKEY="N"
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|
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>Next</A
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|
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></TD
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></TR
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|
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><TR
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><TD
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|
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WIDTH="33%"
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|
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ALIGN="left"
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|
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VALIGN="top"
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|
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>Using Bochs internal debugger</TD
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><TD
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|
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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||
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HREF="howto.html"
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|
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ACCESSKEY="U"
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>Up</A
|
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></TD
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><TD
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|
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WIDTH="33%"
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|
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ALIGN="right"
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|
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VALIGN="top"
|
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|
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>Using the serial port</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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>
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