Aleksander Morgado
a29610f25d
Program received signal SIGSEGV, Segmentation fault.
strchr () at ../sysdeps/arm/armv6/strchr.S:28
28 ../sysdeps/arm/armv6/strchr.S: No such file or directory.
(gdb) bt
#0 strchr () at ../sysdeps/arm/armv6/strchr.S:28
#1 0x76b121c8 in g_param_spec_pool_lookup () from ~/buildroot/output/staging/lib/libgobject-2.0.so.0
#2 0x76b0cf44 in g_object_new_valist () from ~/buildroot/output/staging/lib/libgobject-2.0.so.0
#3 0x76b0d39c in g_object_new () from ~/buildroot/output/staging/lib/libgobject-2.0.so.0
#4 0x75f75e40 in mm_plugin_create () at ublox/mm-plugin-ublox.c:99
#5 0x00031550 in load_plugin (path=0xe9b68 "/usr/lib/ModemManager/libmm-plugin-ublox.so") at mm-plugin-manager.c:1521
#6 load_plugins (error=0x7efffa68, self=0xdc4f0) at mm-plugin-manager.c:1574
#7 initable_init (initable=<optimized out>, cancellable=<optimized out>, error=0x7efffa68) at mm-plugin-manager.c:1679
#8 0x76b9b278 in g_initable_new_valist () from ~/buildroot/output/staging/lib/libgio-2.0.so.0
#9 0x76b9b2e0 in g_initable_new () from ~/buildroot/output/staging/lib/libgio-2.0.so.0
#10 0x000324d0 in mm_plugin_manager_new (plugin_dir=0xe9c40 "/usr/lib/ModemManager", error=error@entry=0x7efffa68) at mm-plugin-manager.c:1620
#11 0x0002da08 in initable_init (initable=0xddb40, cancellable=<optimized out>, error=0x7efffa68) at mm-base-manager.c:1113
#12 0x76b9b278 in g_initable_new_valist () from ~/buildroot/output/staging/lib/libgio-2.0.so.0
#13 0x76b9b2e0 in g_initable_new () from ~/buildroot/output/staging/lib/libgio-2.0.so.0
#14 0x0002e81c in mm_base_manager_new (connection=connection@entry=0xe1070, plugin_dir=plugin_dir@entry=0x9efb0 "/usr/lib/ModemManager",
auto_scan=auto_scan@entry=1, initial_kernel_events=initial_kernel_events@entry=0x0, enable_test=0, error=0x7efffa68, error@entry=0x7efffa60)
at mm-base-manager.c:957
#15 0x0002b6ec in bus_acquired_cb (connection=0xe1070, name=<optimized out>, user_data=<optimized out>) at main.c:87
#16 0x76c26864 in connection_get_cb () from ~/buildroot/output/staging/lib/libgio-2.0.so.0
#17 0x76bc76cc in g_task_return_now () from ~/buildroot/output/staging/lib/libgio-2.0.so.0
#18 0x76bc7d50 in g_task_return () from
~/buildroot/output/staging/lib/libgio-2.0.so.0
See similar bug in GStreamer:
https://bugzilla.gnome.org/show_bug.cgi?id=740191
ModemManager. ModemManager provides a unified high level API for communicating with mobile broadband modems, regardless of the protocol used to communicate with the actual device (Generic AT, vendor-specific AT, QCDM, QMI, MBIM...). Using. ModemManager is a system daemon and is not meant to be used directly from the command line. However, since it provides a DBus API, it is possible to use 'dbus-send' commands or the new 'mmcli' command line interface to control it from the terminal. The devices are queried from udev and automatically updated based on hardware events, although a manual re-scan can also be requested to look for RS232 modems. Implementation. ModemManager is a DBus system bus activated service (meaning it's started automatically when a request arrives). It is written in C, using glib and gio. Several GInterfaces specify different features that the modems support, including the generic MMIfaceModem3gpp and MMIfaceModemCdma which provice basic operations for 3GPP (GSM, UMTS, LTE) or CDMA (CDMA1x, EV-DO) modems. If a given feature is not available in the modem, the specific interface will not be exported in DBus. Plugins. Plugins are loaded on startup, and must implement the MMPlugin interface. It consists of a couple of methods which tell the daemon whether the plugin supports a port and to create custom MMBroadbandModem implementations. It most likely makes sense to derive custom modem implementations from one of the generic classes and just add (or override) operations which are not standard. There are multiple fully working plugins in the plugins/ directory that can be used as an example for writing new plugins. Writing new plugins is highly encouraged! The plugin API is open for changes, so if you're writing a plugin and need to add or change some public method, feel free to suggest it! License. The ModemManager and mmcli binaries are both GPLv2+. The libmm-glib library is LGPLv2+.