> Comments inline > > > > On 15/04/05, Blaisorblade <[EMAIL PROTECTED]> wrote: > > > On Thursday 14 April 2005 06:25, Ian McDonald wrote: > > > > Hi there, > > > > > The problem is that my bootup dies very early on and this is the total > > > > output: Checking for /proc/mm...not found > > > > Checking PROT_EXEC mmap in /tmp...OK > > > > tracing thread pid = 20981 > > > > OP_FORK failed to attach pid > > > > > I suspect that this is something to do with my mixed 32/64 bit > > > > environment but I am not sure... Can anybody shed some light on this? > > > > > > I've seen that *sometimes* too on 64-bit envs., tried doing a "setarch > > > i386 linux" or something like that, to force a 32-bit emulation? > > > setarch isn't on this machine and I can't find the equivalent command for > > sarge. > Tried installing the needed package? On SUSE it's called "linux32".
The debian implementation has a 32 bit user space but it is picking up 64 bit for UML but just override with SUBARCH=i386. I don't have root access to this box. Interestingly enough it has now started working apart from some COW backing store issues which I have to get the system administrator to fix. I changed nothing but notice that the host kernel has changed from 2.6.8 to 2.6.11.7 so something in host kernel may well have fixed my issue! (which I have no control over). > > Also, tried compiling UML itself on a real 32-bit box (with static linking, > obviously)? > Yes - work. > > > Tried disabling the ptrace proxy in compilation, as the first thing? > > > Tried that and no difference. Note that 2.6.11.x with bs4 doesn't > > compile with this option showing unless you set FRAME_POINTER to n. > > You get an error such as: > > > kernel/built-in.o(.text+0x83f4): In function `profile_tick': > > kernel/profile.c:387: undefined reference to `profile_pc' > Hmm, interesting... However, the more likely culprit is CONFIG_SMP: Tried it with CONFIG_SMP off and it resolved the issue. > > include/asm-i386/ptrace.h > > #if defined(CONFIG_SMP) && defined(CONFIG_FRAME_POINTER) > extern unsigned long profile_pc(struct pt_regs *regs); > #else > #define profile_pc(regs) instruction_pointer(regs) > #endif > instruction_pointer is defined, profile_pc is not. > > > The only way I could find to set this option to n was hacking the > > autoconf.h file... > Disable CONFIG_DEBUG_INFO and FRAME_POINTER should become 'n'. > > > So still no 32 bit UML... will try 64 bit (once I get access to the 64 > > bit compiler) and see if I can get that to work.... > Let me recall: you *did* succeed on your older fully-32bit Debian Woody > system, right? Or did I leave something unfixed behind? Yes I did succeed on my 32 bit Woody but that machine is being turned off in next couple of weeks :-( The UML appears now to be working (once I can do more tests) on 64 bit once host kernel was upgraded to 2.6.11.7 (guess is 2.6.11.4+bs4 32 bit). Thanks for your help. Unfortunately I don't have much time to help write patches at present or too many tests as my UML testing has slowed down my project and I have acquired two dedicated machines to help me out... I will certainly try to help though whenever I get bored (which is quite often!) Regards, Ian ------------------------------------------------------- This SF.Net email is sponsored by: New Crystal Reports XI. Version 11 adds new functionality designed to reduce time involved in creating, integrating, and deploying reporting solutions. Free runtime info, new features, or free trial, at: http://www.businessobjects.com/devxi/728 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
