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[Bug ld/23161] New: __bss_start, _end and _edata aren't marked as hidden


From: hjl.tools at gmail dot com
Subject: [Bug ld/23161] New: __bss_start, _end and _edata aren't marked as hidden
Date: Thu, 10 May 2018 18:54:04 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=23161

            Bug ID: 23161
           Summary: __bss_start, _end and _edata aren't marked as hidden
           Product: binutils
           Version: 2.31 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---
            Target: linux

address@hidden tmp]$ cat x.c
void
foo ()
{
}
address@hidden tmp]$ gcc -shared -fpic x.c
address@hidden tmp]$ readelf --dyn-syms a.out 

Symbol table '.dynsym' contains 11 entries:
   Num:    Value          Size Type    Bind   Vis      Ndx Name
     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND 
     1: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND
_ITM_deregisterTMCloneTab
     2: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND __gmon_start__
     3: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND
_ITM_registerTMCloneTable
     4: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND
address@hidden (2)
     5: 0000000000004018     0 NOTYPE  GLOBAL DEFAULT   20 _edata
     6: 00000000000010f9     2 FUNC    GLOBAL DEFAULT   11 foo
     7: 0000000000004020     0 NOTYPE  GLOBAL DEFAULT   21 _end
     8: 0000000000004018     0 NOTYPE  GLOBAL DEFAULT   21 __bss_start
     9: 0000000000001000     0 FUNC    GLOBAL DEFAULT    8 _init
    10: 00000000000010fc     0 FUNC    GLOBAL DEFAULT   12 _fini
address@hidden tmp]$ 

__bss_start, _end and _edata shouldn't be in .dynsym.

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