gdb/2308: SUSE linux 10 (x86_64), gcc 4.1.0, gdb 6.6, Gdb hangs after an error meesge, while trying to attach 32 bit exec on 64 bit gdb build

[rohit_jain at mentor dot com]

>Number:         2308
>Category:       gdb
>Synopsis:       SUSE linux 10 (x86_64), gcc 4.1.0, gdb 6.6, Gdb hangs after an error meesge, while trying to attach 32 bit exec on 64 bit gdb build
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 29 20:08:01 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator:     rohit_jain@mentor.com
>Release:        GNU gdb 6.6
>Organization:
>Environment:
Using built-in specs.
Target: x86_64-suse-linux
Configured with: ../configure --enable-threads=posix --prefix=/usr --with-local-prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.1.0 --enable-ssp --disable-libssp --enable-java
-awt=gtk --enable-gtk-cairo --disable-libjava-multilib --with-slibdir=/lib64 --with-system-zlib --enable-shared --enable-__cxa_atexit --enable-libstdcxx-allocator=new --without-
system-libunwind --with-cpu=generic --host=x86_64-suse-linux
Thread model: posix
gcc version 4.1.0 (SUSE Linux)

GNU gdb 6.6
This GDB was configured as "x86_64-unknown-linux-gnu".

Linux xyz 2.6.16.27-0.6-smp #1 SMP Wed Dec 13 09:34:50 UTC 2006 x86_64 x86_64 x86_64 GNU/Linux

Welcome to SUSE Linux Enterprise Server 10 (x86_64) - Kernel \r (\l).
>Description:
Gdb has problem on SUSE Linux Enterprise Server 10 (x86_64). I am using 64 bit gdb on this platform. When i try to attach a program (which is 32 bit executable), Gdb gets stuck after an error message.

       (gdb) info program
        Using the running image of attached process 459.
        Program stopped at 0xffffe410.
        (gdb) continue
        Continuing.
        Warning:
        Cannot insert breakpoint -27.
        Error accessing memory address 0xf7fa5ff0: Input/output error.

I have attached a reproducible testcase for this issue.
>How-To-Repeat:
- 'make build'
- run './test' (it will wait for an input)
- open 'gdb' in another terminal
- gdb> 'file ./test -readnow'
- gdb> attach <test_pid>   (find PID for ./test and attach it here)
- gdb> continue
- gdb will stuck with following error:

        (gdb) continue
        Continuing.
        Warning:
        Cannot insert breakpoint -27.
        Error accessing memory address 0xf7fa5ff0: Input/output error.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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