Mounting MTD With Qemu-system-mipsel |LINK|
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This package provides a daemon (agent) to run inside qemu-systemguests (full system emulation). It communicates with the host usinga virtio-serial channel org.qemu.guest_agent.0, and allows one to performsome functions in the guest from the host, including:
EMUX is a collection of scripts, kernels and filesystems residing inthe /emux directory. It uses qemu-system-arm,qemu-system-mips and qemu-system-mipsel toboot up virtual ARM and MIPS Linux environments. The /emuxdirectory is exported over NFS to also make the contents availablewithin the QEMU guest.
Since you are dealing with a binary compiled for MSB (Big Endian) systems, you need to extract the router's compressed filesytem from the firmware,then chroot into the extacted file system and run qemu-mips-static from inside the file system.
If -r is specified, qemu-img tries to repair any inconsistencies foundduring the check. -r leaks repairs only cluster leaks, whereas-r all fixes all kinds of errors, with a higher risk of choosing thewrong fix or hiding corruption that has already occurred.
If the -n option is specified, the target volume creation will beskipped. This is useful for formats such as rbd if the targetvolume has already been created with site specific options that cannotbe supplied through qemu-img.
QEMU supports many image file formats that can be used with VMs as well as withany of the tools (like qemu-img). This includes the preferred formatsraw and qcow2 as well as formats that are supported for compatibility witholder QEMU versions or other hypervisors.
Btrfs has low performance when hosting a VM image file, even more when the gueston the VM also using btrfs as file system. Turning off COW is a way to mitigatethis bad performance. Generally there are two ways to turn off COW on btrfs:a) Disable it by mounting with nodatacow, then all newly created files will beNOCOW. b) For an empty file, add the NOCOW file attribute. That's what this optiondoes.
Four executables cover simulation of 32 and 64-bit MIPS systems inboth endian options, qemu-system-mips, qemu-system-mipselqemu-system-mips64 and qemu-system-mips64el. Five different machine types are emulated:
Enable USB emulation on machine types with an on-board USB host controller (if not enabled by default). Note that on-board USB host controllers may not support USB 3.0. In this case -device qemu-xhci can be used instead on machines with PCI.
The man pages qemu-kvm(1), qemu-system-aarch64(1), qemu-system-alpha(1), qemu-system-arm(1), qemu-system-avr(1), qemu-system-cris(1), qemu-system-hppa(1), qemu-system-i386(1), qemu-system-loongarch64(1), qemu-system-m68k(1), qemu-system-microblaze(1), qemu-system-microblazeel(1), qemu-system-mips(1), qemu-system-mips64(1), qemu-system-mips64el(1), qemu-system-mipsel(1), qemu-system-nios2(1), qemu-system-or1k(1), qemu-system-ppc(1), qemu-system-ppc64(1), qemu-system-riscv32(1), qemu-system-riscv64(1), qemu-system-rx(1), qemu-system-s390x(1), qemu-system-sh4(1), qemu-system-sh4eb(1), qemu-system-sparc(1), qemu-system-sparc64(1), qemu-system-tricore(1), qemu-system-x86_64(1), qemu-system-xtensa(1) and qemu-system-xtensaeb(1) are aliases of qemu(1).
Hello balu,thanks for your quick response. I have recompiled qemu 0.14 from the sources, i also see the option realview-pb-a8 when i type qemu-system-arm -M ?. For this to work do i have to recompile the kernel with realview_defconfig ? When i executed with this option with the kernel i have compiled with your instructions it just displays blank screen. Any idea?
Hi Balau, u r expert. it seems problem was indeed with qemu itself ubuntu10.04 and qemu version 0.12.3 i have download qemu both from linaro ( 0.14.50 qemu-linaro 2011.04-1) and qemu.org (0.14.1)
I could reproduce your problem with a simple multi-threaded program (using qemu-i386 version 0.15.1 (Debian 0.15.1+dfsg-3)).I never used QEMU userspace emulator for i386, but googling I quickly found this: =43480 2b1af7f3a8