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[Bug ld/12882] New: Wrong @dtpoff relocation with -pie

From: ubizjak at gmail dot com
Subject: [Bug ld/12882] New: Wrong @dtpoff relocation with -pie
Date: Mon, 13 Jun 2011 17:09:25 +0000


           Summary: Wrong @dtpoff relocation with -pie
           Product: binutils
           Version: 2.21
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: address@hidden
        ReportedBy: address@hidden

Created attachment 5791
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5791
asm code that triggers -pie relocation error

Attached testcase from gcc testsuite triggers a ld bug with @dtpoff relocation
and -pie on 32bit i686-pc-linux target.

address@hidden test]$ gcc -m32 run-ld.s
address@hidden test]$ ./a.out
address@hidden test]$ gcc -m32 -pie run-ld.s
address@hidden test]$ ./a.out
Aborted (core dumped)

ld --version
GNU ld version 20110118

Running through the debugger, wrong values are loaded at "<<" lines.

000005d0 <get_ld>:
 5d0:    53                       push   %ebx
 5d1:    bb d6 05 00 00           mov    $0x5d6,%ebx
 5d6:    81 c3 e6 12 00 00        add    $0x12e6,%ebx
 5dc:    65 a1 00 00 00 00        mov    %gs:0x0,%eax
 5e2:    90                       nop
 5e3:    8d 74 26 00              lea    0x0(%esi,%eiz,1),%esi
 5e7:    5b                       pop    %ebx
 5e8:    8b 90 04 00 00 00        mov    0x4(%eax),%edx           << here
 5ee:    03 90 00 00 00 00        add    0x0(%eax),%edx           << here
 5f4:    89 d0                    mov    %edx,%eax
 5f6:    c3                       ret

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