dea-key-wrap=on|off Enables or disables DEA key wrapping support on s390-ccw hosts. Thisįeature controls whether AES wrapping keys will be created to allowĮxecution of AES cryptographic functions. aes-key-wrap=on|off Enables or disables AES key wrapping support on s390-ccw hosts. The host, de-duplicates identical memory pages among VMs instances mem-merge=on|off Enables or disables memory merge support. dump-guest-core=on|off Include guest memory in a core dump. For accel=xen the default is off otherwise theĭefault is on. vmport=on|off|auto Enables emulation of VMWare IO port, for vmmouse etc. Next one is used if the previous one fails to initialize. If there is more than one accelerator specified, the Depending on the targetĪrchitecture, kvm, xen, hax, hvf, whpx or tcg can be available. So QEMU must be told to not have parallel ports to have working GUS.Īccel=accels1] This is used to enable an accelerator. Note that, by default, GUS shares IRQ(7) with parallel ports and QEMU uses YM3812 emulation by Tatsuyuki Satoh.
QEMU uses the PC BIOS from the Seabios project and the PCI UHCI, OHCI, EHCI or XHCI USB controller and a virtual USB-1.1.Adlib (OPL2) - Yamaha YM3812 compatible chip.Intel HD Audio Controller and HDA codec.Intel 82801AA AC97 Audio compatible sound card.IPMI BMC, either and internal or external one.2 PCI IDE interfaces with hard disk and CD-ROM support.(hardware level, including all non standard modes). Cirrus CLGD 5446 PCI VGA card or dummy VGA card with Bochs VESA extensions.i440FX host PCI bridge and PIIX3 PCI to ISA bridge.Type "apropos word" to search for commands related to "word".
Type "show configuration" for configuration details.įor bug reporting instructions, please see:įind the GDB manual and other documentation resources online at: This GDB was configured as "x86_64-redhat-linux-gnu". There is NO WARRANTY, to the extent permitted by law. This is free software: you are free to change and redistribute it. License GPLv3+: GNU GPL version 3 or later
Load the main.o with gdb so that it can read the debugging symbols: ~/o/arm ❯❯❯ gdb main.oĬopyright (C) 2015 Free Software Foundation, Inc. Now you can launch a new terminal and connect to this port. What it says is that GDB is listening on that port of your system. Waiting for gdb connection on device 'tcp::1234' QEMU 2.4.1 monitor - type 'help' for more information You should be seeing the output as: ~/o/arm ❯❯❯ qemu-system-arm -S -M connex -drive file=flash.bin,if=pflash,format=raw -nographic -serial /dev/null Now you will be dropped to a Qemu prompt, much like the GDB prompt: QEMU 2.4.1 monitor - type 'help' for more informationĪt the prompt, you should type in gdbserver. It tells Qemu to pause the execution once its ready to execute the very first instruction. So again, you can find the instruction in the page I just mentioned, but, for debugging requirement, there is just one extra switch you need to add: qemu-system-arm -S -M connex -drive file=flash.bin,if=pflash,format=raw -nographic -serial /dev/null Steps for doing that, is mentioned in BraveGNU website. So now link your application with the ld, take our the binary content and flash it on to a dd image. This info will be later picked by GDB to help you debug your application. ggdb switch asks as to include some debuggin information in the resulting main.o file. You would assemble this using the GNU assembler, like always, but take a note at the extra options used: arm-none-eabi-as -o main.o main.S -ggdb For example, lets call this file main.S, a simple source file, in ASM. I assume that you have your basic application ready.
Here I show you how to debug your baremetal application using GDB and QEMU. It explains in a lucid style everything you need to know to get started with Embedded System programming with the GNU tools. So you want to learn ARM assembly programming ? I've found this wonderful resource compiled by Vijay Kumar.