Property:call

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BoxMatrix >> System >> call

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Procfs-Object

Procfs-Object:	call   -   type File	Wiki	Freetz	IPPF	whmf	AVM	Web
Location:	System >> Proc-Filesystem   -   Origin: AVM
Path:	/proc/avm
Properties:	Firmware: 6.87   -   Kernel (perm): 3.10.73 (r)
Function:	Low-level Kernel debugging (development Kernels only).

Goto:   Examples  -  Dependencies   -   Model-Matrix   -   Help Supportdata2   -   SMW-Browser

Details

call is a low-level Kernel debugging helper, provided by avm_core_debug.ko, which is only built into development Kernels.

It is a commandline interface typically used with echo > to trigger a set of testing functions.
Most of these functions are intentional bugs to test the Kernel crash handling. 7530ac fw 7.50:

waddr <addr> <val>                # Write to address
raddr <addr> <count>              # Read from address
oomslab <order> <limit>           # OOM via slab allocation
oomskb <count>                    # check skb-oom limit=<count>
oom <order> <limit>               # OOM via vmalloc
bug_on                            # Trigger bug on
event_ovr <trigger_msec> <count>  # Remote event-overrun or stress
kcrash                            # Trigger NULL-Pointer access
hw_wdog [<cpu>]                   # Lock up all cpus/specific cpu
timer <percent> <cpu>             # Waste <percent> of time in sw-irq on <cpu>
hang-mutex <timeout>              # Hang a task on a mutex for <timeout> seconds
alloc <kbyte> <order-mask> <age> <threads> [stop][GFP_KERNEL]
                                  # Alloc limit=<kbyte> order=0x<order-mask> 
                                  #   age=<age>(jiffies)  num=<threads> [stop][GFP_KERNEL]
faila                             # Check double-free, invalid kfree-pointer
panic                             # Trigger kernel panic

Additional commands if CONFIG_AVM_FASTIRQ is enabled:

bug_on_firq                       # Trigger bug on in fiq mode
kcrash_firq                       # NULL-Pointer access in fiq mode
panic_firq                        # Trigger panic in fiq mode
deadlock                          # Lock all fast and normal interrupts

Examples

echo panic > /proc/avm/call

Boom!

Dependencies

Daily updated index of all dependencies of this object. Last update: GMT.
A ** in the Mod column marks info from Supportdata2 probes, which will always stay incomplete.
A - in the Mod column marks manual research, the Firmware then shows where the Object occurs, not the Relation.

Relation	Typ	Object	Mod	Firmware	Info	Origin
0 dependencies for this object

Model-Matrix

Daily updated index of the presence, path and size of this object for each model. Last update: 2024-11-21 05:21 GMT.
Showing all models using this object. Click any column header (click-wait-click) to sort the list by the respective data.
The (main/scrpn/boot/arm/prx/atom/rtl) label in the Model column shows which CPU is meant for Multi-Linux models.
Note that this list comes from Supportdata2 probes, which can have arbitrary settings and come from different firmware versions.
It doesn't say much if a model is not listed here. It may be a missing supportdata2 file or just a disabled feature.

Model	Firmware	Path	Kernel (perm)
FRITZ!Box 7412	6.87	/proc/avm	3.10.73 (r)
1 model uses this object

Help Supportdata2

The data in this article is incomplete since it was manually collected using the Supportdata2 project.

Unlike the Supportdata-Probes which have been collected for years Supportdata2 is brand new and only has a few probes.
If you have access to a shell then please help to extend the Supportdata2 collection to improve this data.

It's easy and it's done in minutes. Please send created data as an Email attachment to the address listed here. Thanks!

SMW-Browser

Property:call

Information is currently being retrieved from the backend.