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xen-devel
Re: [Xen-devel] Xen refuses to load minimal dom0 kernel
I am trying to link a minimal Domain 0 kernel (adapted from the
Mini-OS), but when Xen tries to build the Domain 0 it panics:
"Domain 0 allocation is too small for kernel image."
which is caused by the following code in xen/arch/x86/domain_build.c:
order = get_order_from_bytes(v_end - dsi.v_start);
if ( (1UL << order) > nr_pages )
panic("Domain 0 allocation is too small for kernel image.\n");
The linker script I am using is adapted from the Mini-OS and
links .text at 0xC0000000 + 0x100000, just like the Linux kernel
does. Does any one has any hints what I am doing wrong and what
this test actually checks for?
Mini-OS assumes .text at 0x0. Since you've changed that, you better
make corresponding changes to VIRT_BASE and ELF_PADDR_OFFSET in mini-
os/arch/x86/x86_32.S. If that does not help, could you send an output
of the following printk added just before the if statement?
printk("v_start=%lx v_end=(%lx, %lx)\n", dsi.v_start, v_end, dsi.v_end);
Thanks
Gregor
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