[Bug remote/28360] segfault in bfd_get_elf_phdr_upper_bound

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28360

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |palves at sourceware dot org

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #1)
> With this:
> ...
> diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c
> index ae2f7c14f6d..d7eaa75a34a 100644
> --- a/gdb/linux-tdep.c
> +++ b/gdb/linux-tdep.c
> @@ -2327,7 +2327,7 @@ linux_vsyscall_range_raw (struct gdbarch *gdbarch,
> struct mem_ra
> nge *range)
>    /* It doesn't make sense to access the host's /proc when debugging a
>       core file.  Instead, look for the PT_LOAD segment that matches
>       the vDSO.  */
> -  if (!target_has_execution ())
> +  if (!target_has_execution () && core_bfd != nullptr)
>      {
>        long phdrs_size;
>        int num_phdrs, i;
> ...
> we have instead:
> ...
> (gdb) set sysroot remote:^M
> warning: "remote:" is deprecated, use "target:" instead.^M
> warning: sysroot set to "target:".^M
> warning: unable to open /proc file '/proc/0/task/0/maps'^M
> (gdb) PASS: gdb.server/server-exec-info.exp: set sysroot remote:
> info files^M
> (gdb) FAIL: gdb.server/server-exec-info.exp: info files
> ...

Not sure if this is correct, and if this is a fix or a workaround.

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