Bochs: Difference between revisions

When you're using Bochs with the [http://bochs.sourceforge.net/doc/docbook/user/internal-debugger.html internal debugger], you can trigger the debugger via a systemfacility called [http://bochs.sourceforge.net/doc/docbook/user/bochsrc.html#AEN2324 magic breakpoints]. To trigger a breakpoint, you can insert <tt>xchg bx, bx</tt> (in GAS syntax, <tt>xchgw %bx, %bx</tt>) anywhere in the code and Bochs will trap into the debugger as soon as it executes it. On real systemshardware this has no effect as it onlymerely replaces the BX register with itself.

On older versions, enabling the debugger alone doesn't compile in magic breakpoint support, you will also need to passspecify <tt>--enable-magic-breakpoint</tt> towhen configureconfiguring the build on those versions.