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| 4 | <!-- Created on March, 6 2012 by texi2html 1.66 --> | ||
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| 6 | Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author) | ||
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| 8 | Olaf Bachmann <obachman@mathematik.uni-kl.de> | ||
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| 14 | <HEAD> | ||
| 15 | <TITLE>Pintos Projects: Footnotes</TITLE> | ||
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| 29 | <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="pintos.html#SEC_Top">Top</A>]</TD> | ||
| 30 | <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="pintos.html#SEC_Contents">Contents</A>]</TD> | ||
| 31 | <TD VALIGN="MIDDLE" ALIGN="LEFT">[Index]</TD> | ||
| 32 | <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="pintos_abt.html#SEC_About"> ? </A>]</TD> | ||
| 33 | </TR></TABLE> | ||
| 34 | <H1>Footnotes</H1> | ||
| 35 | <H3><A NAME="FOOT1" HREF="pintos_2.html#DOCF1">(1)</A></H3> | ||
| 36 | <P>GDB might tell you that | ||
| 37 | <CODE>schedule()</CODE> doesn't exist, which is arguably a GDB bug. | ||
| 38 | You can work around this by setting the breakpoint by filename and | ||
| 39 | line number, e.g. <CODE>break thread.c:<VAR>ln</VAR></CODE> where <VAR>ln</VAR> is | ||
| 40 | the line number of the first declaration in <CODE>schedule()</CODE>. | ||
| 41 | <H3><A NAME="FOOT2" HREF="pintos_2.html#DOCF2">(2)</A></H3> | ||
| 42 | <P>We | ||
| 43 | will treat these terms as synonyms. There is no standard | ||
| 44 | distinction between them, although Intel processor manuals make | ||
| 45 | a minor distinction between them on 80<VAR>x</VAR>86. | ||
| 46 | <H3><A NAME="FOOT3" HREF="pintos_5.html#DOCF3">(3)</A></H3> | ||
| 47 | <P>This is because <CODE>switch_threads()</CODE> takes | ||
| 48 | arguments on the stack and the 80<VAR>x</VAR>86 SVR4 calling convention | ||
| 49 | requires the caller, not the called function, to remove them when the | ||
| 50 | call is complete. See [ <A HREF="pintos_10.html#SysV-i386">SysV-i386</A>] chapter 3 for details. | ||
| 51 | <H3><A NAME="FOOT4" HREF="pintos_5.html#DOCF4">(4)</A></H3> | ||
| 52 | <P>Actually, virtual to physical translation on the | ||
| 53 | 80<VAR>x</VAR>86 architecture occurs via an intermediate "linear | ||
| 54 | address," but Pintos (and most modern 80<VAR>x</VAR>86 OSes) set up the CPU | ||
| 55 | so that linear and virtual addresses are one and the same. Thus, you | ||
| 56 | can effectively ignore this CPU feature. | ||
| 57 | <H3><A NAME="FOOT5" HREF="pintos_8.html#DOCF5">(5)</A></H3> | ||
| 58 | <P><CODE>pintos-gdb</CODE> is a wrapper around | ||
| 59 | <CODE>gdb</CODE> (80<VAR>x</VAR>86) or <CODE>i386-elf-gdb</CODE> (SPARC) that loads | ||
| 60 | the Pintos macros at startup. | ||
| 61 | <H3><A NAME="FOOT6" HREF="pintos_8.html#DOCF6">(6)</A></H3> | ||
| 62 | <P>To be precise, GDB will stop | ||
| 63 | only when running under Bochs. When running under QEMU, you must | ||
| 64 | set a breakpoint in the <CODE>page_fault</CODE> function to stop execution | ||
| 65 | when a page fault occurs. In that case, the <CODE>btpagefault</CODE> macro is | ||
| 66 | unnecessary. | ||
| 67 | <H3><A NAME="FOOT7" HREF="pintos_9.html#DOCF7">(7)</A></H3> | ||
| 68 | <P>This is typically <CODE>vi</CODE>. To | ||
| 69 | exit <CODE>vi</CODE>, type <KBD>: q <KBD>Enter</KBD></KBD>. | ||
| 70 | <HR SIZE=1> | ||
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