Hello everyone,<br>
&nbsp;&nbsp; I find that I can't single step OS kernels use qemu.When I use &quot;step&quot;<br>
or &quot;next&quot; command in gdb,the kernel always enter its interrupt route <br>
instead of executing the next instruction after the breakpoint.So I modify<br>
QEMU's source code to disable interrupts in single step mode,and now I<br>
can use &quot;step&quot; or &quot;next&quot; command in gdb to single step functions.<br>
<br>
&nbsp;&nbsp; Should I post the patch? It is a very small modification.<br clear="all"><br>-- <br>Three passions, simple but overwhelmingly strong, have governed my life: <br>the longing for love, the search for knowledge, and unbearable pity for 
<br>the suffering of mankind.<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
---------Bertrand Russell<br>