samedi 31 mai 2014

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i am trying to emulate cavium octeon's mips64 linux kernel on Qemu.I am currently having some issues with use mode init code and want to debug init.i am starting the Qemu using -s -S option in the command line and running the gdb using command


ddd --debugger /OCTEON-SDK/tools/bin/mips64-octeon-linux-gnu-gdb /OCTEON-SDK/linux/kernel_2.6/linux/vmlinux


and then attaching the gdb with command


target remote localhost:1234


The gdb is currently showing only the instructions running in kernel space.


What i want to ask is there any method by which i can debug the usermode init and libraries instructions step by step as in case of kernel space? For example if printf is issued from init then i want to see that which instructions are being executed in the libraries and how the control is returned to kernel ?



i am trying to emulate cavium octeon's mips64 linux kernel on Qemu.I am currently having some issues with use mode init code and want to debug init.i am starting the Qemu using -s -S option in the command line and running the gdb using command


ddd --debugger /OCTEON-SDK/tools/bin/mips64-octeon-linux-gnu-gdb /OCTEON-SDK/linux/kernel_2.6/linux/vmlinux


and then attaching the gdb with command


target remote localhost:1234


The gdb is currently showing only the instructions running in kernel space.


What i want to ask is there any method by which i can debug the usermode init and libraries instructions step by step as in case of kernel space? For example if printf is issued from init then i want to see that which instructions are being executed in the libraries and how the control is returned to kernel ?


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