Diff for /wikisrc/users/jakllsch.mdwn between versions 1.3 and 1.4

version 1.3, 2009/10/29 16:34:05 version 1.4, 2010/05/01 20:15:13
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 # Jonathan Kollasch  # Jonathan Kollasch
   
   ## [[!template id=man name="ddb" section="4"]] tips
   
   ### locating a softc
   This locates a device's softc using it's `cfdriver_t` (e.g. `&mainbus_cd`, `&cpu_cd`) and its "device unit" (e.g. the `0` in `mainbus0`).
   
       db{0}> call device_lookup_private(ohci_cd, 0)
       0xffff800045fb2008
   
   ### locating structure members
   This uses [[!template id=man name="gdb" section="1"]] and a kernel with debugging symbols to find the offset to a element in a structure.
   
       $ gdb netbsd.gdb
       ...
       (gdb) print &((struct ohci_softc *)0)->iot
       $3 = (bus_space_tag_t *) 0x478
       (gdb) print &((struct ohci_softc *)0)->ioh
       $4 = (bus_space_handle_t *) 0x480
   
   ### peeking at mapped registers
   
       db{0}> call bus_space_read_4(*(ffff800045fb2008+478), *(ffff800045fb2008+480), 0)
       0x110
   
 ## Unfinished Projects  ## Unfinished Projects
   
 ### x86 UEFI kernel loader  ### x86 UEFI kernel loader

Removed from v.1.3  
changed lines
  Added in v.1.4


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