Re: [PATCH] gdb: Add support for TLS under RTEMS

[Kevin Buettner <kevinb@redhat.com>]

On Wed, 22 Apr 2026 10:18:40 -0500
Kinsey Moore <kinsey.moore@oarcorp.com> wrote:

> This support uses the presence of the ".rtemsroset" section to detect
> whether an ELF was created using RTEMS. This works for current RTEMS
> development (7) branch, 6 branch, 5 branch, and 4.11 branch. This
> registers the TLS callback for architectures under which RTEMS is known
> to support TLS. The RTEMS self-hosted GDB server is only expected to
> support TLS in RTEMS 6 branch and the current development branch and
> will only respond without error to qGetTLSAddr request in those
> versions. Other GDB servers will respond with TLS information if
> available.

[...]
> diff --git a/gdb/configure.tgt b/gdb/configure.tgt
> index ba418653e86..05160714069 100644
> --- a/gdb/configure.tgt
> +++ b/gdb/configure.tgt
> @@ -128,6 +128,8 @@ case "${targ}" in
>  	os_obs="netbsd-tdep.o solib-svr4.o";;
>  *-*-openbsd*)
>  	os_obs="obsd-tdep.o solib-svr4.o";;
> +*-rtems*)
> +	os_obs="rtems-tdep.o solib-svr4.o";;
>  esac
[...]

> +#include "solib-svr4.h"

[...]

> +static void
> +rtems_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
> +{
> +  set_gdbarch_fetch_tls_load_module_address (gdbarch,
> +
> svr4_fetch_objfile_link_map); +}

Does (or will) RTEMS have SVR4 shared library support?  If not, then
the various references to solib-svr4 files and mechanisms should
be removed.

Kevin