On 07/02/2024 10:42 am, Jürgen Groß wrote: > On 07.02.24 11:38, Samuel Thibault wrote: >> Juergen Gross, le mer. 07 févr. 2024 11:31:38 +0100, a ecrit: >>> The .bss segment should be zeroed at very early boot. >> >> Is that not done by the elf loader of Xen? > > It might be done by Xen tools today, but I'm quite sure it is not part > of the ABI. The hypervisor doesn't clear .bss when loading a domain (e.g. > dom0).
It is a requirement of loading an ELF file. If we're not doing it for dom0, that's a bug. > I stumbled over it while implementing kexec in Mini-OS. For that I need > it for sure. A kexec kernel does need to do this, unless the kexec-loader is going to guarantee to do it, and I don't believe it does. ~Andrew
