[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] RE: RE: Problem with config file (Petersson, Mats)
I would do a simple thing: to write xm create -c <config file> and to load a simple program which print a simple message ("Thi is the hello world program") on the screen! I created a simple assembler program which print the message: .text .globl _start _start: cld # from include/asm-xeno/hypervisor.h movl $2,% eax # __HYPERVISOR_console_write (include/asm- xeno/hypervisor-ifs/hypervisor-if.h) movl $hello_message,%ebx # arg1 = buffer virtual address movl $hello_message_len,%ecx # arg2 = buffer length int $0x82 # from include/asm- xeno/hypervisor.h movl $8,%eax # __HYPERVISOR_sched_op movl $1,%ebx # SCHEDOP_exit int $0x82 hang: jmp hang # shouldn't get here hello_message: .ascii "This is the hello world program\n" hello_message_len = . - hello_message The Xen loader also wants a 12- byte header on the image file. So I wrote a little assembler module (xenoguestheader.s) to handle that: .text .globl _start _start: .ascii "XenoGues" # read_kernel_header (tools/xc/lib/xc_linux_build.c) .long _start # - the kernel's load address The final image has to consist of the 12-bytes object code from xenoguestheader.s followed the object code from helloworld.s. Here is my makefile to accomplish that: helloworld.gz: helloworld.s xenoguestheader.raw as -o helloworld.o - a=helloworld.l helloworld.s ld -Ttext 0x100000 -o helloworld.elf helloworld.o objcopy -O binary -S -g helloworld.elf helloworld.raw cat xenoguestheader.raw helloworld.raw | gzip > helloworld.gz xenoguestheader.raw: xenoguestheader.s as -o xenoguestheader.o xenoguestheader.s ld -Ttext 0x100000 -o xenoguestheader xenoguestheader.o objcopy -O binary -S -g xenoguestheader xenoguestheader.raw This example is at the URL www.o3one.org/xen. html, but the config file run on Xen 1.2. I would make something but for Xen 3.X. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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