[Bug libc/11767] New: RFE: dlopen of in-memory ET_DYN or ET_EXEC object

[Bug libc/11767] New: RFE: dlopen of in-memory ET_DYN or ET_EXEC object

[jreiser at BitWagon dot com]

Request For Enhancement (RFE): Please implement some way to add an ELF object
(ET_DYN or ET_EXEC) that already is in memory, into the set of modules that are
managed by the runtime loader rtld, instead of requiring dlopen() of a file from
the filesystem.  This capability is useful for managing modules that are created
at runtime, and/or to help implement protection and access controls, etc.

Here is a suggestion of syntax and semantics: a new function
   #include <link.h>  /* macro-ize Elf32_Xxx vs. Elf64_Xxx */
   void *handle = dlopen_phdr(ElfW(Phdr) const *phdr, int n_phdr, int flag);
which is much like dlopen() except that the mmap()s already have been done
before calling dlopen_phdr().  The "slide" value (adjustment in load address)
may be computed from the difference between the input phdr parameter and the
PT_PHDR.p_vaddr that is found in the vector of ElfW(Phdr)s.

-- 
           Summary: RFE: dlopen of in-memory ET_DYN or ET_EXEC object
           Product: glibc
           Version: 2.12
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: jreiser at BitWagon dot com
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=11767

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[Bug libc/11767] RFE: dlopen of in-memory ET_DYN or ET_EXEC object

[ppluzhnikov at google dot com]

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                 CC|                            |ppluzhnikov at google dot
                   |                            |com


http://sourceware.org/bugzilla/show_bug.cgi?id=11767

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[Bug libc/11767] RFE: dlopen of in-memory ET_DYN or ET_EXEC object

[John.Tobey at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11767

John Tobey <John.Tobey at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |John.Tobey at gmail dot com

--- Comment #1 from John Tobey <John.Tobey at gmail dot com> 2010-11-12 23:36:28 UTC ---
I've been itching for this for quite some time.  Hope it happens!  Meanwhile,
I'll implement a fallback using a temp file.
Thanks,
John

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