[Bug libc/12067] New: PIE && prelink && -m31 = crash

[Bug libc/12067] New: PIE && prelink && -m31 = crash

[jan dot kratochvil at redhat dot com]

echo 'main(){return 42;}'|gcc -m31 -fPIE -pie -g -o 1 -x c -;prelink 1;./1;echo $?
Segmentation fault
139

FAIL:
glibc-2.12-1.7.el6.s390
prelink-0.4.3-4.el6.s390x
gcc-4.4.4-13.el6.s390x
kernel-2.6.32-71.el6.s390x

PASS:
glibc-2.5-42.el5_4.5.s390
prelink-0.4.0-2.el5.s390x
gcc-4.1.2-46.el5_4.2.s390x
kernel-2.6.18-164.25.1.el5.s390x

It crashes on:
./sysdeps/s390/s390-32/elf/start.S
.L21:   l       %r5,36(%r9)    /* Load the e_flags field.  */
$r3 = in-file address
$r9 = (in-memory - in-file) offset
$r11 = in-memory address

Prelinking PIE does not make much sense but it can be run everywhere else.

It affects GDB gdb.base/break-interp.exp testcase.

-- 
           Summary: PIE && prelink && -m31 = crash
           Product: glibc
           Version: 2.12
            Status: NEW
          Severity: minor
          Priority: P2
         Component: libc
        AssignedTo: drepper dot fsp at gmail dot com
        ReportedBy: jan dot kratochvil at redhat dot com
                CC: glibc-bugs at sources dot redhat dot com,luisgpm at
                    linux dot vnet dot ibm dot com
  GCC host triplet: s390-ibm-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=12067

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[Bug libc/12067] PIE && prelink && -m31 = crash

[drepper dot fsp at gmail dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|drepper dot fsp at gmail dot|luisgpm at linux dot vnet
                   |com                         |dot ibm dot com
             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=12067

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[Bug libc/12067] PIE && prelink && -m31 = crash

[luisgpm at linux dot vnet dot ibm dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|luisgpm at linux dot vnet   |krebbel1 at de dot ibm dot
                   |dot ibm dot com             |com


http://sourceware.org/bugzilla/show_bug.cgi?id=12067

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[Bug libc/12067] PIE && prelink && -m31 = crash

[krebbel1 at de dot ibm dot com]

------- Additional Comments From krebbel1 at de dot ibm dot com  2010-09-28 16:52 -------
Created an attachment (id=5019)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=5019&action=view)
Fix

The calculation of the relocation offset was wrong. It basically worked only
for PIE with a base address of zero what is not the case for a prelinked
binaries. The patch fixes the testcase for me.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=12067

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[Bug libc/12067] PIE && prelink && -m31 = crash

[krebbel1 at de dot ibm dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |WAITING


http://sourceware.org/bugzilla/show_bug.cgi?id=12067

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[Bug libc/12067] PIE && prelink && -m31 = crash

[jan dot kratochvil at redhat dot com]

------- Additional Comments From jan dot kratochvil at redhat dot com  2010-09-28 19:56 -------
Verified it also on gdb.base/break-interp.exp and it fully PASSes now.
Could you submit it for a check-in?
I do not find it serious enough for RHEL. Please file a RH Bug if you find it is.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|krebbel1 at de dot ibm dot  |jan dot kratochvil at redhat
                   |com                         |dot com
             Status|WAITING                     |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=12067

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[Bug libc/12067] PIE && prelink && -m31 = crash

[jan dot kratochvil at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|jan dot kratochvil at redhat|krebbel1 at de dot ibm dot
                   |dot com                     |com


http://sourceware.org/bugzilla/show_bug.cgi?id=12067

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[Bug libc/12067] PIE && prelink && -m31 = crash

[drepper dot fsp at gmail dot com]

------- Additional Comments From drepper dot fsp at gmail dot com  2010-09-29 15:34 -------
Fixed in git.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://sourceware.org/bugzilla/show_bug.cgi?id=12067

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