/[emacs]/emacs/etc/PROBLEMS
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revision 1.176 by rms, Sat Jun 25 04:48:24 2005 UTC revision 1.177 by rms, Tue Jun 28 18:52:26 2005 UTC
# Line 2377  The fix is to install a newer version of Line 2377  The fix is to install a newer version of
2377    
2378  With certain recent Linux kernels (like the one of Redhat Fedora Core  With certain recent Linux kernels (like the one of Redhat Fedora Core
2379  1 and 2), the new "Exec-shield" functionality is enabled by default, which  1 and 2), the new "Exec-shield" functionality is enabled by default, which
2380  creates a different memory layout that breaks the emacs dumper.  creates a different memory layout that breaks the emacs dumper.
2381    The work-around explained here is not enough on Fedora Core 4. Read the
2382    next item.
2383    
2384  Configure can overcome the problem of exec-shield if the architecture is  Configure can overcome the problem of exec-shield if the architecture is
2385  x86 and the program setarch is present.  On other architectures no  x86 and the program setarch is present.  On other architectures no
# Line 2404  command when running temacs like this: Line 2406  command when running temacs like this:
2406    
2407      setarch i386 ./temacs --batch --load loadup [dump|bootstrap]      setarch i386 ./temacs --batch --load loadup [dump|bootstrap]
2408    
2409    *** Fedora Core 4 GNU/Linux: Segfault during dumping.
2410    
2411    In addition to exec-shield explained above "Linux: Segfault during
2412    `make bootstrap' under certain recent versions of the Linux kernel"
2413    item, Linux kernel shipped with Fedora Core 4 randomizes the virtual
2414    address space of a process. As the result dumping is failed even if
2415    you turn off the exec-shield. In such case use -R option of setarch
2416    command:
2417    
2418       setarch -R i386 ./temacs --batch --load loadup [dump|bootstrap]
2419    
2420    or
2421    
2422       setarch -R i386 make bootstrap      
2423    
2424  *** Fatal signal in the command  temacs -l loadup inc dump.  *** Fatal signal in the command  temacs -l loadup inc dump.
2425    

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