[Bug testsuite/26990] New: [-m32] FAIL: gdb.arch/amd64-gs_base.exp: print fs_base

[Bug testsuite/26990] New: [-m32] FAIL: gdb.arch/amd64-gs_base.exp: print fs_base

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26990

            Bug ID: 26990
           Summary: [-m32] FAIL: gdb.arch/amd64-gs_base.exp: print fs_base
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: testsuite
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

With target board unix/-m32, I see:
...
FAIL: gdb.arch/amd64-gs_base.exp: print fs_base
FAIL: gdb.arch/amd64-gs_base.exp: print gs_base
FAIL: gdb.arch/amd64-gs_base.exp: info registers fs_base and gs_base with value
...

In more detail:
...
(gdb) print /x $fs_base^M
$1 = void^M
(gdb) FAIL: gdb.arch/amd64-gs_base.exp: print fs_base
print /x $gs_base^M
$2 = void^M
(gdb) FAIL: gdb.arch/amd64-gs_base.exp: print gs_base
print $fs_base = 2^M
$3 = 2^M
(gdb) PASS: gdb.arch/amd64-gs_base.exp: set fs_base
print $gs_base = 3^M
$4 = 3^M
(gdb) PASS: gdb.arch/amd64-gs_base.exp: set gs_base
info register sys^M
orig_eax       0xffffffff          -1^M
(gdb) FAIL: gdb.arch/amd64-gs_base.exp: info registers fs_base and gs_base with
value
...

Using maint print xml-tdesc, we can see the presence of fs_base for -m64:
...
$ gcc hello.c
$ gdb -batch a.out -ex start -ex "maint print xml-tdesc" \
  | grep -i fs_base
    <reg name="fs_base" bitsize="64" type="int" regnum="58"/>
$
...
and -m32:
...
$ gcc hello.c -m32
$ gdb -batch a.out -ex start -ex "maint print xml-tdesc" \
  | grep -i fs_base
$
...

So, we should just make this unsupported for -m32, instead of failing.

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[Bug testsuite/26990] [-m32] FAIL: gdb.arch/amd64-gs_base.exp: print fs_base

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26990

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tom de Vries <vries@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=67748e0f666f0645d7f182e1365f4d9859e55f1d

commit 67748e0f666f0645d7f182e1365f4d9859e55f1d
Author: Tom de Vries <tdevries@suse.de>
Date:   Fri Dec 4 13:36:48 2020 +0100

    [gdb/testsuite] Make gdb.arch/amd64-gs_base.exp unsupported for i386

    With target board unix/-m32 I run into:
    ...
    (gdb) print /x $fs_base^M
    $1 = void^M
    (gdb) FAIL: gdb.arch/amd64-gs_base.exp: print fs_base
    ...

    The problem is that the fs_base register is not supported for i386.

    Fix this by making the test unsupported if fs_base/gs_base don't show up in
    info register sys output.

    Tested on x86_64-linux.

    gdb/testsuite/ChangeLog:

    2020-12-04  Tom de Vries  <tdevries@suse.de>

            PR testsuite/26990
            * gdb.arch/amd64-gs_base.exp: Handle -m32 where fs_base and gs_base
            are unsupported.

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[Bug testsuite/26990] [-m32] FAIL: gdb.arch/amd64-gs_base.exp: print fs_base

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26990

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |11.1

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Patch with test-case update committed.

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