From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020529 Description of problem: Please enhance "info registers" to list the current base and limit values for segment registers on ix86. This would be particularly useful when debugging code which uses NPTL locale/threads/etc on i686 because /lib/tls/libc.so.6 uses %gs extensively. Version-Release number of selected component (if applicable): gdb-5.3post-0.20021129.18 How reproducible: Always Steps to Reproduce: 1. Run any program under gdb; stop at a breakpoint. 2. (gdb) info registers 3. Actual Results: cs 0x23 35 ss 0x2b 43 ds 0x2b 43 es 0x2b 43 fs 0x0 0 gs 0x0 0 Expected Results: cs 0x23 35 0 0xfffff ss 0x2b 43 0xc0000000 0xfdfff ds 0x2b 43 0 0xfffff es 0x2b 43 0 0xfffff fs 0x0 0 gs 0x33 51 0x42130020 0xfffff Additional info: Probably, full generality will require a new kernel call to report the values, although in the specific case of %gs usage by NPTL, there may be a backdoor for NPTL to cooperate with gdb.
Red Hat apologizes that these issues have not been resolved yet. We do want to make sure that no important bugs slip through the cracks. Red Hat Linux 7.3 and Red Hat Linux 9 are no longer supported by Red Hat, Inc. They are maintained by the Fedora Legacy project (http://www.fedoralegacy.org/) for security updates only. If this is a security issue, please reassign to the 'Fedora Legacy' product in bugzilla. Please note that Legacy security update support for these products will stop on December 31st, 2006. If this is not a security issue, please check if this issue is still present in a current Fedora Core release. If so, please change the product and version to match, and check the box indicating that the requested information has been provided. If you are currently still running Red Hat Linux 7.3 or 9, please note that Fedora Legacy security update support for these products will stop on December 31st, 2006. You are strongly advised to upgrade to a current Fedora Core release or Red Hat Enterprise Linux or comparable. Some information on which option may be right for you is available at http://www.redhat.com/rhel/migrate/redhatlinux/. Any bug still open against Red Hat Linux 7.3 or 9 at the end of 2006 will be closed 'CANTFIX'. Again, if this bug still exists in a current release, or is a security issue, please change the product as necessary. We thank you for your help, and apologize again that we haven't handled these issues to this point.
This request still applies to Fedora Core 6 test 1, gdb-6.5-3.fc6rh. There is no box to check that I am supplying the requested info; so, change to NeedInfo - Assignee. (Entered page via http://bugzilla.redhat.com/bugzilla, was recognized by cookie as logged in, typed bug number in GoTo Bug# box, typed <Enter>. Searched page for "req" using Find command in Firefox (<ctrl>F) to be sure that I did not overlook any checkbox about requested information.)
Now there is a "I am providing the requested information" box, just under the "Please create attachement". So I will check it.
Fedora Core 5 and Fedora Core 6 are, as we're sure you've noticed, no longer test releases. We're cleaning up the bug database and making sure important bug reports filed against these test releases don't get lost. It would be helpful if you could test this issue with a released version of Fedora or with the latest development / test release. Thanks for your help and for your patience. [This is a bulk message for all open FC5/FC6 test release bugs. I'm adding myself to the CC list for each bug, so I'll see any comments you make after this and do my best to make sure every issue gets proper attention.]
This enhancement request still applies. "info registers" should list the base and limit for %gs, but does not. I change the bugreport Version to "devel". (gdb) info reg . . . cs 0x73 115 ss 0x7b 123 ds 0x7b 123 es 0x7b 123 fs 0x0 0 gs 0x33 51 (gdb) show version GNU gdb Red Hat Linux (6.6-7.fc7rh)
Thanks. This may be better (read: more quickly, or ever) addressed by upstream gdb -- http://sourceware.org/cgi-bin/gnatsweb.pl .