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authorLinus Torvalds <torvalds@linux-foundation.org>2023-04-24 12:35:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2023-04-24 12:35:49 -0700
commitc23f28975abc2eb02cecc8bc1f2c95473a59ed2e (patch)
treed356762219c0d3079d37f1cc3ab3eef5cd37567a /Documentation/translations/zh_CN/arch/parisc/debugging.rst
parent1be89faab3cf1f3dd6eb4924b60d2b9094e7206b (diff)
parent7e8472c820f04517ae5d5a27c1aecfa2263a0aa5 (diff)
Merge tag 'docs-6.4' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet: "Commit volume in documentation is relatively low this time, but there is still a fair amount going on, including: - Reorganize the architecture-specific documentation under Documentation/arch This makes the structure match the source directory and helps to clean up the mess that is the top-level Documentation directory a bit. This work creates the new directory and moves x86 and most of the less-active architectures there. The current plan is to move the rest of the architectures in 6.5, with the patches going through the appropriate subsystem trees. - Some more Spanish translations and maintenance of the Italian translation - A new "Kernel contribution maturity model" document from Ted - A new tutorial on quickly building a trimmed kernel from Thorsten Plus the usual set of updates and fixes" * tag 'docs-6.4' of git://git.lwn.net/linux: (47 commits) media: Adjust column width for pdfdocs media: Fix building pdfdocs docs: clk: add documentation to log which clocks have been disabled docs: trace: Fix typo in ftrace.rst Documentation/process: always CC responsible lists docs: kmemleak: adjust to config renaming ELF: document some de-facto PT_* ABI quirks Documentation: arm: remove stih415/stih416 related entries docs: turn off "smart quotes" in the HTML build Documentation: firmware: Clarify firmware path usage docs/mm: Physical Memory: Fix grammar Documentation: Add document for false sharing dma-api-howto: typo fix docs: move m68k architecture documentation under Documentation/arch/ docs: move parisc documentation under Documentation/arch/ docs: move ia64 architecture docs under Documentation/arch/ docs: Move arc architecture docs under Documentation/arch/ docs: move nios2 documentation under Documentation/arch/ docs: move openrisc documentation under Documentation/arch/ docs: move superh documentation under Documentation/arch/ ...
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+.. include:: ../../disclaimer-zh_CN.rst
+
+:Original: Documentation/arch/parisc/debugging.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+.. _cn_parisc_debugging:
+
+=================
+调试PA-RISC
+=================
+
+好吧,这里有一些关于调试linux/parisc的较底层部分的信息。
+
+
+1. 绝对地址
+=====================
+
+很多汇编代码目前运行在实模式下,这意味着会使用绝对地址,而不是像内核其他
+部分那样使用虚拟地址。要将绝对地址转换为虚拟地址,你可以在System.map中查
+找,添加__PAGE_OFFSET(目前是0x10000000)。
+
+
+2. HPMCs
+========
+
+当实模式的代码试图访问不存在的内存时,会出现HPMC(high priority machine
+check)而不是内核oops。若要调试HPMC,请尝试找到系统响应程序/请求程序地址。
+系统请求程序地址应该与(某)处理器的HPA(I/O范围内的高地址)相匹配;系统响应程
+序地址是实模式代码试图访问的地址。
+
+系统响应程序地址的典型值是大于__PAGE_OFFSET (0x10000000)的地址,这意味着
+在实模式试图访问它之前,虚拟地址没有被翻译成物理地址。
+
+
+3. 有趣的Q位
+============
+
+某些非常关键的代码必须清除PSW中的Q位。当Q位被清除时,CPU不会更新中断处理
+程序所读取的寄存器,以找出机器被中断的位置——所以如果你在清除Q位的指令和再
+次设置Q位的RFI之间遇到中断,你不知道它到底发生在哪里。如果你幸运的话,IAOQ
+会指向清除Q位的指令,如果你不幸运的话,它会指向任何地方。通常Q位的问题会
+表现为无法解释的系统挂起或物理内存越界。