[Bug 5996] New: Enable UCLIBC_BUILD_NOW by Default

bugzilla at busybox.net bugzilla at busybox.net
Thu Feb 28 00:00:30 UTC 2013


           Summary: Enable UCLIBC_BUILD_NOW by Default
           Product: uClibc
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Other
        AssignedTo: unassigned at uclibc.org
        ReportedBy: noloader at gmail.com
                CC: uclibc-cvs at uclibc.org
   Estimated Hours: 0.0

This has security implications too. Surely Gingerbreak and its attack on the
PLT has not been forgotten??? (The PLT was used as a jumping off point or

The trade off (microsecond for the early bind) versus wiping out an entire
class of vulnerabilities seems like a win.

  | This tells the linker to resolve all symbols when the library is        │  
  │ first loaded, rather than when each function is first called.  This     │  
  │ increases start-up latency by a few microseconds and may do             │  
  │ unnecessary work (resolving symbols that are never used), but the       │  
  │ realtime people like it for making microbenchmark timings slightly      │  
  │ more predictable and in some cases it can be slightly faster due to     │  
  │ CPU cache behavior (not having to fault the linker back in to do        │  
  │ lazy symbol resolution).

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