[commit] Error while loading core file on mips-irix

[Joel Brobecker <brobecker at adacore dot com>]

On mips-irix, GDB reports the following error while loading a core file:
 
    (gdb) core core 
    Reading symbols from /usr/lib32/libm.so...done.
    Loaded symbols for /usr/lib32/libm.so
    Reading symbols from /usr/lib32/libc.so.1...done.
    Loaded symbols for /usr/lib32/libc.so.1
    You can't do that without a process to debug.

This is a familiar issue, as we've seen thing before on other targets
(probably Tru64, for instance).
 
The problem is yet again in the irix_solib_create_inferior_hook,
where we try to resume the inferior execution in order to reach
the point where all shared libraries have been mapped.  This is not
necessary when debugging from a core file.  The error comes from
the fact that we attempt a "target_resume", which fails because
the "core" layer does cannot run/resume...

Fixed by simply doing nothing when debugging from a core file.
     
gdb/ChangeLog: 

        Error while loading core file on mips-irix. 
        * solib-irix.c (irix_solib_create_inferior_hook): Do nothing
        if debugging from a core file.

-- 
Joel

gdb/ChangeLog:

        Error while loading core file on mips-irix.
        * solib-irix.c (irix_solib_create_inferior_hook): Do nothing
        if debugging from a core file.
---
 gdb/solib-irix.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/gdb/solib-irix.c b/gdb/solib-irix.c
index 4c97263..444e8e4 100644
--- a/gdb/solib-irix.c
+++ b/gdb/solib-irix.c
@@ -449,6 +449,11 @@ irix_solib_create_inferior_hook (void)
   if (inf->attach_flag)
     return;
 
+  /* Likewise when debugging from a core file, the shared libraries
+     have already been mapped, so nothing more to do.  */
+  if (!target_can_run (&current_target))
+    return;
+
   if (!enable_break ())
     {
       warning (_("shared library handler failed to enable breakpoint"));
-- 
1.5.4.3