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| author | rsc <rsc> | 2008-09-03 04:50:04 +0000 |
|---|---|---|
| committer | rsc <rsc> | 2008-09-03 04:50:04 +0000 |
| commit | f53494c28e362fb7752bbc83417b9ba47cff0bf5 (patch) | |
| tree | 7a7474710c9553b0188796ba24ae3af992320153 /web/x86-intr.html | |
| parent | ee3f75f229742a376bedafe34d0ba04995a942be (diff) | |
| download | xv6-labs-f53494c28e362fb7752bbc83417b9ba47cff0bf5.tar.gz xv6-labs-f53494c28e362fb7752bbc83417b9ba47cff0bf5.tar.bz2 xv6-labs-f53494c28e362fb7752bbc83417b9ba47cff0bf5.zip | |
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diff --git a/web/x86-intr.html b/web/x86-intr.html new file mode 100644 index 0000000..0369e25 --- /dev/null +++ b/web/x86-intr.html @@ -0,0 +1,53 @@ +<title>Homework: xv6 and Interrupts and Exceptions</title> +<html> +<head> +</head> +<body> + +<h1>Homework: xv6 and Interrupts and Exceptions</h1> + +<p> +<b>Read</b>: xv6's trapasm.S, trap.c, syscall.c, vectors.S, and usys.S. Skim +lapic.c, ioapic.c, and picirq.c + +<p> +<b>Hand-In Procedure</b> +<p> +You are to turn in this homework during lecture. Please +write up your answers to the exercises below and hand them in to a +6.828 staff member at the beginning of the lecture. +<p> + +<b>Introduction</b> + +<p>Try to understand +xv6's trapasm.S, trap.c, syscall.c, vectors.S, and usys.S. Skim + You will need to consult: + +<p>Chapter 5 of <a href="../readings/ia32/IA32-3.pdf">IA-32 Intel +Architecture Software Developer's Manual, Volume 3: System programming +guide</a>; you can skip sections 5.7.1, 5.8.2, and 5.12.2. Be aware +that terms such as exceptions, traps, interrupts, faults and aborts +have no standard meaning. + +<p>Chapter 9 of the 1987 <a href="../readings/i386/toc.htm">i386 +Programmer's Reference Manual</a> also covers exception and interrupt +handling in IA32 processors. + +<p><b>Assignment</b>: + +In xv6, set a breakpoint at the beginning of <code>syscall()</code> to +catch the very first system call. What values are on the stack at +this point? Turn in the output of <code>print-stack 35</code> at that +breakpoint with each value labeled as to what it is (e.g., +saved <code>%ebp</code> for <code>trap</code>, +<code>trapframe.eip</code>, etc.). +<p> +<b>This completes the homework.</b> + +</body> + + + + + |