gdb

---

to debug the kernel in the emulator:

Configure the kernel by hand to include debugging symbols:

cd kernel
make menuconfig

Select Kernel hacking or whatever it is called and select the item which says to compile the kernel with debugging info.

make
cd ..

When starting the emulator use sth. like: (but change the openbsd refs to linux)

out/host/openbsd-x86_64/bin/emulator -show-kernel -system out/target/product/generic -kernel kernel/arch/arm/boot/zImage -logcat *:v -qemu -monitor telnet::4444,server -s

then it will sit waiting for you to prepare your gdb session:

prebuilt/openbsd-x86_64/toolchain/arm-eabi-4.2.1/bin/arm-eabi-gdb kernel/vmlinux
(gdb) br sys_execve (or some other place you want to gain control)
(gdb) target remote localhost:1234

and then, in another window, release qemu by attaching to its monitor:

telnet localhost 4444
(qemu) cont

thanks mai, unfortunately emulator (qemu) not going help in this case. unless broadcom release bcm21533 emulator

i have good and bad news. good news : the patch is work, means my assumption about freq control in bcm21533 maybe right. bad news : we stuck in 832MHz, at lest until got new data/info. 832MHz already use biggest mode and pll divider register is read-only (at least from software)

other 'bad' news is, look like under clock will not give big boost in battery performance. look at my attached image, that's cpu freq state from my phone after more than 2 days (data off, wifi on when screen on, 624MHz performance while screen on, 312MHz performance while screen off). for normal usage (text,phone,light game/browsing) the phone spend more than 50% in deep sleep. add improvement to cpufreq will not help much and maybe event make it worse (search about "race-to-idle").

what if 0xG? hmm this phone's chipset is not really flexible i think..

Originally Posted by ARVolutionz

what if 0xG?

there is no such number.
f is biggest notation in hexadecimal. next to 0xf is 0x10, but i don't think that mode exist. the kernel even explicitly cut mode to 0xf. but that's just my opinion, i don't try yet, so if you want to try please do it and let me and others know the result.

the fact that pll divider register/memory is expose maybe show that value can be change. but maybe only can change with set some flag bit or only possible using hardware programmer. without more info/doc almost impossible to know.

Originally Posted by ARVolutionz

hmm this phone's chipset is not really flexible i think..

from price/features stand point, bcm21533 is good deal. it have usb-otg, and (possibility) build-in audio equalizer. the problems is samsung (and broadcom) don't use all the features and don't even release any documentation about it.

lol i thought that was a "legit" variable..
the phone sets to 832 (maybe) only when 624 mhz is running at 80% usage.. so thats just a maybe to me..

check this out : http://forum.xda-developers.com/show...2#post24637502

What is this bro???? another kernel besides maroc?

Originally Posted by Maroc-OS

check this out : http://forum.xda-developers.com/show...2#post24637502

i did, and no kernel source for 1ghz. and some micro have non changeable register/memory. it's like fuse, once written they store the value forever, or if possible can change use special programmer (usually using jtag). if this is what we got, good bye overclock

Originally Posted by renr29

What is this bro???? another kernel besides maroc?

not 'complete' kernel, just patch. please read first post.

What does it do then/.??

hi friend

i notice we have already got overclock on 5360 ...
but i'm currently trying to work on S6120 (i.e. Galaxy Y Duos)

it uses same processor bcm-21553

so overclocking and enabling 624mhz etc should work here too

i just want to know what changes are need to clock-21553.c file to get other frequencies working??

i have developed only snapdragon kernels till now and the bcm clock file is giving me headaches

any help will be appreciated


the kernel sources for S6102 i have pushed to github (as of now, without any changes at all made to original sources..totally untouched)

https://github.com/championswimmer/kCernel-S6120