[Bug sim/14935] New: printf/swiwrite with arm-none-eabi target simulator only working on first run

[Bug sim/14935] New: printf/swiwrite with arm-none-eabi target simulator only working on first run

[htm at lavabit dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14935

             Bug #: 14935
           Summary: printf/swiwrite with arm-none-eabi target simulator
                    only working on first run
           Product: gdb
           Version: 7.5
            Status: NEW
          Severity: normal
          Priority: P2
         Component: sim
        AssignedTo: unassigned@sourceware.org
        ReportedBy: htm@lavabit.com
    Classification: Unclassified


Hello,
the printf behaviour with 7.5 and arm-none-eabi simulator is strange.
It will only show output on the very first run of the programm. Running it
again will show no further output.
To make it worse there seem to be two bugs:
SWIWrite (from armos.c) is only called after the first "run" after "load".
"run" again after a finished inferior will not call SWIWrite again.
This is workaroundable by calling "load" again, but then at the second run the
file descriptor is wrong:
armos.c:
res = sim_callback->write (sim_callback, f, local, len);
this will call through
callback.c
os_write
where a call to
fdbad
will return -1 and set error to EBADF because 
p->fd_buddy[fd] < 0

Until a real fix (the simulator seems to be not reinitialized well)
sim_callback->write_stdout (sim_callback, local, len);
can be substituted for the write.
But this still only works on the first run.

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[Bug sim/14935] printf/swiwrite with arm-none-eabi target simulator only working on first run

[htm at lavabit dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14935

Johannes Goslar <htm at lavabit dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |htm at lavabit dot com

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[Bug sim/14935] printf/swiwrite with arm-none-eabi target simulator only working on first run

[vapier at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=14935

Mike Frysinger <vapier at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vapier at gentoo dot org

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[Bug sim/14935] printf/swiwrite with arm-none-eabi target simulator only working on first run

[vapier at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=14935

Mike Frysinger <vapier at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |arm-eabi

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[Bug sim/14935] printf/swiwrite with arm-none-eabi target simulator only working on first run

[vapier at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=14935

Mike Frysinger <vapier at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at sourceware dot org   |nickc at redhat dot com

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[Bug sim/14935] sim: arm: printf/swiwrite only working on first run

[vapier at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=14935

Mike Frysinger <vapier at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|printf/swiwrite with        |sim: arm: printf/swiwrite
                   |arm-none-eabi target        |only working on first run
                   |simulator only working on   |
                   |first run                   |

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[Bug sim/14935] sim: arm: printf/swiwrite only working on first run

[luis.machado at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=14935

Luis Machado <luis.machado at arm dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |luis.machado at arm dot com

--- Comment #1 from Luis Machado <luis.machado at arm dot com> ---
Hi Nick, are you still planning to address this?

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[Bug sim/14935] sim: arm: printf/swiwrite only working on first run

[nickc at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=14935

--- Comment #2 from Nick Clifton <nickc at redhat dot com> ---
(In reply to Luis Machado from comment #1)
> Hi Nick, are you still planning to address this?

No, sorry - I am really not able to work on ARM SIM issues any more.

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