Hello, On Tue, 13 Feb 2018, Chet Ramey wrote: > > It would be nice if bash's malloc implementation could be fixed to also > > work under qemu-user. > > Does sbrk(2) work in a PIE-enabled environment?
Note that a bash binary compiled with PIE works fine for normal usage with a current Linux kernel. Apparently it was causing troubles with older Linux kernels, see https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1518483 But with current kernels it works fine. The problem only happens under qemu-user. >From what I understood the memory layout of a PIE-compiled binary is different but sbrk() still works the same. Maybe some assumption that you are doing about the memory layout are not holding true however. While trying to learn more about this I found this URL https://gist.github.com/CMCDragonkai/10ab53654b2aa6ce55c11cfc5b2432a4 I'm sorry but I don't know much more than that on this topic. Maybe some qemu developers should be involved in the discussion. Cheers, -- Raphaël Hertzog ◈ Debian Developer Support Debian LTS: https://www.freexian.com/services/debian-lts.html Learn to master Debian: https://debian-handbook.info/get/
