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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 3 Apr 2009 19:17:23 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/lib/libc/gen Makefile.inc dlfcn.c dlfunc.c
 src/libexec/rtld-elf Symbol.map rtld.c
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kib         2009-04-03 19:17:23 UTC

  FreeBSD src repository

  Modified files:
    lib/libc/gen         Makefile.inc dlfcn.c 
    libexec/rtld-elf     Symbol.map rtld.c 
  Removed files:
    lib/libc/gen         dlfunc.c 
  Log:
  SVN rev 190673 on 2009-04-03 19:17:23Z by kib
  
  Allow the NULL, RTLD_SELF and RTLD_NEXT handles to work with dlfunc(3).
  dlfunc() called dlsym() to do the work, and dlsym() determines the dso
  that originating the call by the return address. Due to this, dlfunc()
  operated as if the caller is always the libc.
  
  To fix this, move the dlfunc() to rtld, where it can call the internal
  implementation of dlsym, and still correctly fetch return address.
  Provide usual weak stub for the symbol from libc for static binaries.
  dlfunc is put to FBSD_1.0 symver namespace in the ld.so export to
  override dlfunc@FBSD_1.0 weak symbol, exported by libc.
  
  Reported, analyzed and tested by:       Tijl Coosemans <tijl ulyssis org>
  PR: standards/133339
  Reviewed by:    kan
  
  Revision  Changes    Path
  1.142     +1 -1      src/lib/libc/gen/Makefile.inc
  1.16      +8 -0      src/lib/libc/gen/dlfcn.c
  1.4       +0 -30     src/lib/libc/gen/dlfunc.c (dead)
  1.7       +1 -0      src/libexec/rtld-elf/Symbol.map
  1.134     +14 -0     src/libexec/rtld-elf/rtld.c