Creating a \/proc entry
\n=============================<\/p>\n
Create a pseudo file \/proc\/mem_map by using a separate Linux kernel module (not statically linked into the kernel. From here on, all the assignments are expected to be Linux Modules).<\/p>\n
As you all know by now, mem_map is a global array that consists of all the struct page entries.<\/p>\n
It should display the following information…<\/p>\n
1. Virtual Address of mem_map global variable in the Linux kernel. In short, contents of the variable.
\n2. Physical Address of mem_map location. Convert the above virtual address to physical and print it
\n3. Print the number of struct page entries that are available as part of the mem_map<\/p>\n
You can read some more information about mem_map at…
\nhttp:\/\/www.chudov.com\/tmp\/LinuxVM\/html\/understand\/node28.html<\/p>\n
Goals:
\n=====
\n* You will learn how the \/proc entries are created
\n* Learn how to convert the virtual to physical and vice versa in Linux kernel
\n* Ability to look at and if necessary understand the struct page entries<\/p>\n
Submission
\n=========
\n* Module code and associated Makefile
\n* Readme.txt – Details of how to build, execute and what to expect<\/p>\n
Notes:
\nIn some systems, mem_map variable is not exported or used. In such scenarios, please use pfn_to_page(0) in place of mem_map. Meaning and use of both are exactly same.<\/p>\n","protected":false},"excerpt":{"rendered":"
Pseudo file \/proc\/mem_map Creating a \/proc entry ============================= Create a pseudo file \/proc\/mem_map by using a separate Linux kernel module (not statically linked into the kernel. From here on, all the assignments are expected to be Linux Modules). As you Read More …<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-432524","post","type-post","status-publish","format-standard","hentry","category-essay-paper-writing"],"_links":{"self":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts\/432524","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/comments?post=432524"}],"version-history":[{"count":0,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts\/432524\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/media?parent=432524"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/categories?post=432524"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/tags?post=432524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}