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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><HTML><HEAD><TITLE>80386 Programmer's Reference Manual -- Chapter 12</TITLE></HEAD><BODY><B>up:</B> <A HREF="toc.htm">Table of Contents</A><BR><B>prev:</B> <A HREF="s11_02.htm">11.2 General Multiprocessing</A><BR><B>next:</B><A HREF="s12_01.htm">12.1 Debugging Features of the Architecture</A><P><HR><P><H1>Chapter 12 Debugging</H1><P>The 80386 brings to Intel's line of microprocessors significant advances indebugging power. The single-step exception and breakpoint exception ofprevious processors are still available in the 80386, but the principaldebugging support takes the form of debug registers. The debug registerssupport both instruction breakpoints and data breakpoints. Data breakpointsare an important innovation that can save hours of debugging time bypinpointing, for example, exactly when a data structure is beingoverwritten. The breakpoint registers also eliminate the complexitiesassociated with writing a breakpoint instruction into a code segment(requires a data-segment alias for the code segment) or a code segmentshared by multiple tasks (the breakpoint exception can occur in the contextof any of the tasks). Breakpoints can even be set in code contained in ROM.<P><A HREF="s12_01.htm">12.1 Debugging Features of the Architecture</A><BR><A HREF="s12_02.htm">12.2 Debug Registers</A><BR><A HREF="s12_03.htm">12.3 Debug Exceptions</A><P><HR><P><B>up:</B> <A HREF="toc.htm">Table of Contents</A><BR><B>prev:</B> <A HREF="s11_02.htm">11.2 General Multiprocessing</A><BR><B>next:</B><A HREF="s12_01.htm">12.1 Debugging Features of the Architecture</A></BODY>?? 快捷鍵說明
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