Messages in this thread | | | From | Blaisorblade <> | Subject | Re: [uml-devel] Re: [patch 4/4] uml: make it link in tt mode against NPTL glibc | Date | Sat, 28 May 2005 13:38:22 +0200 |
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On Friday 27 May 2005 06:20, Al Viro wrote: > On Fri, May 27, 2005 at 02:40:24AM +0200, blaisorblade@yahoo.it wrote: > > To make sure switcheroo() can execute when we remap all the executable > > image, we used a trick to make it use a local copy of errno... this trick > > does not work with NPTL glibc, only with LinuxThreads, so use another > > (simpler) one to make it work anyway. > > > > Might need compile testing on different host archs, since it changes > > __syscall_return from <asm/unistd.h>. > > For one thing, it's broken since mmap2() doesn't exist on amd64. This > stuff *is* low-level - as low-level as it gets. > It's clearly > per-architecture. Yes, agreed. > See ftp.linux.org.uk/pub/people/viro/UM14-unmap-RC12-rc4 > for a fix... Seems reasonable except that on i386 you keep the old linker script, indeed; I think that the linker script shouldn't be per architecture.
Also (not verified) one section is either read-write or read-only, so merging .bss and .text does not seem good to me (I separated them on purpose).
Good catch for using .bss instead of .data. -- Paolo Giarrusso, aka Blaisorblade Skype user "PaoloGiarrusso" Linux registered user n. 292729 http://www.user-mode-linux.org/~blaisorblade
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