linux - Learning kernel hacking and embedded development at home? -

-

i attracted world of kernel hacking , embedded systems.
has got tutorials (+easily available hardware) on starting mess such stuff?
kits writing drivers etc, come documentation , affordable?

thanks!

if new kernel development, suggest not starting hardware development , going "software-only" kernel modules proc file / sysfs or more complex examples filesystem / network development , developing on uml/vmware/virtualbox/... machine crashing machine won't hurt :) embedded development go small arm development kit or small via c3/c4 machine, or old pc can burn homebrew usb / pci / whatever device.

a place start kernelnewbies.org - has lots of links , useful information kernel developers, , features list of easy implement tasks tackle beginners.

some books read:

understanding linux kernel - reference detailing design of kernel subsystems

linux device drivers - written more tutorial lot of example code, focusing on getting going , explaining key aspects of linux kernel. introduces build process , basics of kernel modules.

linux kernel module programming guide - more introductory material

as suggested earlier, looking @ linux code idea, linux kernel api's tend change quite ... lxr helps lot nice browsing interface - lxr.linux.no

to understand kernel build process, link might helpful:

linux kernel makefiles (kbuild)

last not least, browse documentation directory of kernel source distribution!

here interesting exercises insolently stolen kernel development class:

  • write kernel module creates file /proc/jiffies reporting current time in jiffies on every read access.
  • write kernel module providing proc file /proc/sleep. when application writes number of seconds ascii text file ("echo 3 > /proc/sleep"), should block specified amount of seconds. write accesses should have no side effect on contents of file, i.e., on read accesses, file should appear empty (see ldd3, ch. 6/7)
  • write proc file can store text temporarily (using echo "blah" > /proc/pipe) , out again (cat /proc/pipe), clearing file. watch out synchronisation issues.
  • modify pipe example module register character device /dev/pipe, add dynamic memory allocation write requests.
  • write simple file system.

Comments

Post a Comment

Popular posts from this blog

c++ - How do I get a multi line tooltip in MFC -

-
right now, have tool tip pops when hover on edit box. problem tool tip contains multiple error messages , in 1 long line. need have each error message on own line. error messages contained in cstring new line seperating them. my existing code below. bool ontooltiptext(uint, nmhdr* pnmhdr, lresult* presult) { assert(pnmhdr->code == ttn_needtexta || pnmhdr->code == ttn_needtextw); // need handle both ansi , unicode versions of message tooltiptexta* pttta = (tooltiptexta*)pnmhdr; tooltiptextw* ptttw = (tooltiptextw*)pnmhdr; // tchar szfulltext[256]; cstring strtiptext=_t(""); uint nid = pnmhdr->idfrom; if (pnmhdr->code == ttn_needtexta && (pttta->uflags & ttf_idishwnd) || pnmhdr->code == ttn_needtextw && (ptttw->uflags & ttf_idishwnd)) { // idfrom hwnd of tool nid = ::getdlgctrlid((hwnd)nid); } //m_errprojaccel[ch] contains 1 or more error messages each...
Read more

asp.net - In javascript how to find the height and width -

-
i having .aspx , masterpage page. in masterpage loading aspx page . in aspx page design using generating table structure using code-behind server in javascript how find height , width . regards, kumar if you're looking table height , width, should it var tbl = document.getelementbyid('tbldemo'); alert(tbl.offsetwidth + '\n' + tbl.offsetheight);
Read more

c# - DataTable to EnumerableRowCollection -

-
i have datatable according client requirement can contain invalid date "00/00/1999",null,empty string.(typed datset) when collect them enumerables wish convert of invalid forms empty string. (i.e) enumerablerowcollection<datarow> query = order in _table.asenumerable() select new { orderdate= string.isnullorempty(convert.tostring(order.field<datetime>("orderdate")) || (how check date invalid date) ? string.empty : order.field<datetime>("orderdate") } how check whether date valid date or not? datetime.tryparse...like given current code: datetime date; enumerablerowcollection<datarow> query = order in _table.asenumerable() select new { orderdate= string.isnullorempty(convert.tostring(order.field<datetime>("orderdate")) || !datetime.tryparse(convert.tostring(order.field<datetime...
Read more