Try enabling EARLY_PRINTK for your platform. This may or not may not be supported. If it is, add the proper command line argument to enable this, visit those:
http://smackerelofopinion.blogspot.ca/2009/11/kernel-early-printk-messages.html?m=1 http://elinux.org/Debugging_by_printing#Debugging_early_boot_problems What version of Linux did you compile? What toolchain did you use? Emeric Le 11 févr. 2015 1:11 PM, "Chris Furlough" <chrisfurlo...@gmail.com> a écrit : > Hey Guys. > > I'm trying to do some custom kernel development under the goldfish > emulator. I've compiled my own kernel (using the goldfish config), and > gdb. I'm having some problems that I hope you guys can help with. (I've > exhausted my google searches and online tutorials). > > I'm using Android Studio to launch the emulator with the following command > line: > /home/android/Android/Sdk/tools/emulator -avd Nexus_10_API_19 -netspeed > full -netdelay none -show-kernel -qemu -s -S -kernel > /home/android/goldfish/arch/arm/boot/zImage > > This loads, and stops as you'd expect. I launch gdb in a different window: > ~/WholeTree/prebuilts/gcc/linux-x86/arm/arm-eabi-4.7/bin$ ./arm-eabi-gdb > ~/goldfish/vmlinux > > I then do this: > (gdb) target remote :1234 > Remote debugging using :1234 > 0x00000000 in ?? () > > Obviously that 0x00000000 is a problem. *The kernel versions match. Why > is this?* > > I'm working with the early boot stuff inside the Linux kernel. > > When I launch the kernel, via: > > (gdb) cont > Continuing. > > I get this: > > serial0 console > Uncompressing Linux... done, booting the kernel. > > > And then it hangs. > > When I ctrl-c it, I get: > > ^C > Program received signal SIGINT, Interrupt. > 0x0044f82c in ?? () > > > *I'm not asking for help with my CODE, only my debugging. Any ideas what > my GDB problem is here?* > > -- > -- > unsubscribe: android-kernel+unsubscr...@googlegroups.com > website: http://groups.google.com/group/android-kernel > --- > You received this message because you are subscribed to the Google Groups > "Android Linux Kernel Development" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to android-kernel+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel --- You received this message because you are subscribed to the Google Groups "Android Linux Kernel Development" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-kernel+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
