anchao opened a new pull request #4871: URL: https://github.com/apache/incubator-nuttx/pull/4871
## Summary binfmt/elf: add bare metal coredump support Add elf coredump support for bare metal files, The new version of GDB toolchain adds support for bare metal core dump: http://patches-tcwg.linaro.org/patch/49192/ This makes it possible for the standard coredump to be parsed, we can generate the standard coredump for gdb debugging directly. GDB version must be more than **12**: gdb upstream: `https://github.com/bminor/binutils-gdb` Compile config: `./configure --host=x86_64-linux-gnu --target=arm-none-eabi --with-python --with-mpfr --with-babeltrace --with-lzma --enable-unicode=ucs4 --enable-targets=all` gdb version: ``` $ ././gdb/gdb --version ... GNU gdb (GDB) 12.0.50.20211119-git ... ``` coredump file from this patch (armv8-m m55): ``` $ readelf -h armv8-m_m55_coredump ELF Header: Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 Class: ELF32 Data: 2's complement, little endian Version: 1 (current) OS/ABI: UNIX - System V ABI Version: 0 Type: CORE (Core file) Machine: ARM Version: 0x1 Entry point address: 0x0 Start of program headers: 52 (bytes into file) Start of section headers: 0 (bytes into file) Flags: 0x5000400, Version5 EABI, hard-float ABI Size of this header: 52 (bytes) Size of program headers: 32 (bytes) Number of program headers: 3 Size of section headers: 0 (bytes) Number of section headers: 0 Section header string table index: 0 ``` start debug: ``` $ ././gdb/gdb -c armv8-m_m55_coredump nuttx_elf --data-directory=gdb/data-directory Copyright (C) 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "--host=x86_64-linux-gnu --target=arm-none-eabi". Type "show configuration" for configuration details. For bug reporting instructions, please see: <https://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /home/archer/code/l05c/m2/nuttx/nuttx... warning: core file may not match specified executable file. [New process 31] [New process 1] [New process 2] [New process 3] [New process 4] [New process 5] [New process 6] [New process 8] [New process 9] [New process 10] [New process 12] [New process 13] [New process 14] [New process 15] [New process 16] [New process 17] [New process 18] [New process 20] [New process 21] [New process 22] [New process 23] [New process 24] [New process 25] [New process 31] Core was generated by `'. #0 hal_sleep_light_sleep () at ../../platform/hal/hal_sleep.c:506 506 return ret; [Current thread is 1 (process 31)] ``` ``` (gdb) info thread Id Target Id Frame * 1 process 31 hal_sleep_light_sleep () at ../../platform/hal/hal_sleep.c:506 2 process 1 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 3 process 2 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 4 process 3 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 5 process 4 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 6 process 5 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 7 process 6 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 8 process 8 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 9 process 9 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 10 process 10 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 11 process 12 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 12 process 13 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 13 process 14 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 14 process 15 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 15 process 16 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 16 process 17 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 17 process 18 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 18 process 20 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 19 process 21 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 20 process 22 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 21 process 23 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 22 process 24 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 23 process 25 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 24 process 31 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 (gdb) ``` ``` (gdb) thread 16 [Switching to thread 16 (process 17)] #0 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 79 bx lr (gdb) bt #0 arm_switchcontext () at armv8-m/arm_switchcontext.S:79 #1 0x00211198 in nxsig_timedwait (set=set@entry=0x34043d04, info=info@entry=0x34043d08, timeout=timeout@entry=0x0) at signal/sig_timedwait.c:355 #2 0x0021033c in nx_waitpid (pid=<optimized out>, stat_loc=stat_loc@entry=0x34043d4c, options=options@entry=4) at sched/sched_waitpid.c:427 #3 0x00210392 in waitpid (pid=pid@entry=31, stat_loc=stat_loc@entry=0x34043d4c, options=options@entry=4) at sched/sched_waitpid.c:617 #4 0x0c0f7882 in nsh_builtin (vtbl=vtbl@entry=0x34043ef0, cmd=0x3404415c "hello", argv=argv@entry=0x34043db0, redirfile=redirfile@entry=0x0, oflags=oflags@entry=0) at nsh_builtin.c:182 #5 0x0c0f449c in nsh_execute (oflags=0, redirfile=0x0, argv=0x34043db0, argc=<optimized out>, vtbl=0x34043ef0) at nsh_parse.c:541 #6 nsh_parse_command (vtbl=vtbl@entry=0x34043ef0, cmdline=<optimized out>) at nsh_parse.c:2591 #7 0x0c0f469e in nsh_parse (vtbl=vtbl@entry=0x34043ef0, cmdline=cmdline@entry=0x3404415c "hello") at nsh_parse.c:2675 #8 0x0c0f74f4 in nsh_session (pstate=pstate@entry=0x34043ef0, login=login@entry=1 '\001', argc=argc@entry=1, argv=argv@entry=0x34043ed8) at nsh_session.c:233 #9 0x0c0f844c in nsh_consolemain (argc=argc@entry=1, argv=argv@entry=0x34043ed8) at nsh_consolemain.c:116 #10 0x0c0f8d52 in nsh_main (argc=1, argv=0x34043ed8) at nsh_main.c:170 #11 0x0c0da05c in nxtask_startup (entrypt=0xc0f8d1d <nsh_main>, entrypt@entry=0x1, argc=1, argv=0x34043ed8) at sched/task_startup.c:170 #12 0x00211e68 in nxtask_start () at task/task_start.c:144 #13 0x00000000 in ?? () Backtrace stopped: previous frame identical to this frame (corrupt stack?) ``` ``` (gdb) frame 7 #7 0x0c0f469e in nsh_parse (vtbl=vtbl@entry=0x34043ef0, cmdline=cmdline@entry=0x3404415c "hello") at nsh_parse.c:2675 2675 return nsh_parse_command(vtbl, start); (gdb) info args vtbl = 0x34043ef0 cmdline = 0x3404415c "hello" (gdb) info symbol 0x340079e0 g_hpwork in section .psram_bss ``` lookup global symbol: ``` (gdb) p g_ Display all 200 possibilities? (y or n) g_abbrev_monthname g_cbfreelist g_flowctrl_turnback g_http10 g_iob_qpool g_nxrecorder_cmds g_serialops g_uart0port g_abbrev_wdayname g_cbprealloc g_fmtarginvalid g_http11 g_iob_sem g_oldpwd g_services_db g_uart0priv g_active_netlink_connections g_cfg80211_rdev g_fmtargrange g_httpcontsize g_ioctl_work g_oneshot_ops g_sigmask g_uart0rxbuffer g_active_tcp_connections g_checksum g_fmtargrequired g_httpcrnl g_ioexpander g_overrun_msg g_skb_alloc_size g_uart0txbuffer g_adcCalibrated g_cmdmap g_fmtcmdfailed g_httphost g_known_ext g_passwd g_spiarginvalid g_uart2port g_adcIntcpt g_count g_fmtcmdnotfound g_httplocation g_last_tcp_port g_priority g_spiargrange g_uart2priv g_adcSlope g_current_regs g_fmtcmdoutofmemory g_httpuseragentfields g_line_separator g_program_regions g_spicmdnotfound g_uart2rxbuffer g_addrenv_dummy g_datemontab g_fmtcontext g_hw_vif_data g_lirc_fops g_pthreadhash g_spicmds g_uart2txbuffer g_alarmwork g_daysbeforemonth g_fmtdeepnesting g_hx3203_fileops g_lo_hostname g_ptmx_fops g_spiincompleteparam g_uart_ops g_arptable g_dd g_fmtinternalerror g_i2c_open g_lo_ipv4addr g_pty_fops g_spitoomanyargs g_uart_rpmsg_ops g_audio_heap g_debug_intersys g_fmtnomatching g_i2carginvalid g_lo_ipv4mask g_pwd g_stacksize g_uartbtport g_audioops g_defactions g_fmtnosuch g_i2cargrange g_loop_fops g_pwmops g_stackused g_uartbtpriv g_baud_table g_default_channel_ops g_fmtsignalrecvd g_i2cargrequired g_misc_data g_qentry_sem g_state g_uartbtrxbuffer g_bes_io_ops g_default_pthread_attr g_fmtsyntax g_i2ccmdfailed g_mon_lengths g_ramlog_channel_ops g_sub_if_data g_uartbttxbuffer g_bes_lirc_ops g_devfreed g_fmttoomanyargs g_i2ccmdnotfound g_monthname g_ramlogfops g_success g_unknown g_bes_rptun_ops g_devset g_free_netlink_connections g_i2ccmds g_net_dev g_recv_int_cmd_index g_sysbuffer g_urand_fops g_bops g_dtoa_round g_free_sem g_i2ctoomanyargs g_netdevices g_redirect1 g_tasklisttable g_usrsock_rpmsg_handler g_bt_uart_filter_ble_evt_table g_dtoa_scale_down g_free_tcp_connections g_i2cxfrerror g_netlink_connections g_redirect2 g_tcp_connections g_wdayname g_bt_uart_filter_bt_evt_table g_dtoa_scale_up g_freerun_lock g_idle_topstack g_netlock g_rgbledops g_tcpsequence g_wdogops g_btnarg g_erasetoeol g_ftpdaccounts g_idlename g_noname g_rptun_devops g_telnet_fops g_wdtdev g_btnhandler g_exitstatus g_groupid g_iob_committed g_nsh_extmatch g_rtc_lowerhalf g_telopts g_wdtops g_btnlower g_factory_fops g_hcibridge_ops g_iob_freelist g_nshgreeting g_rtc_ops g_throttle_sem g_wildabbr g_btnnum g_failure g_heap g_iob_freeqlist g_nshprompt g_rx_flowctrl g_tickless g_wiphy_hw_priv g_builtin_count g_fl3236a_fileops g_holder g_iob_pool g_nullstring g_scheduler g_token_separator g_wrbuffer g_builtins g_flags g_home g_iob_qcommitted g_nxplayer_cmds g_send_int_cmd_index g_type g_year_lengths *** List may be truncated, max-completions reached. *** (gdb) p g_net g_net_dev g_netdevices g_netlink_connections g_netlink_sockif g_netlock g_netstat_linegen (gdb) p g_net_dev $1 = {{name = "wlan0\000\000\000\000\000\000\000\000\000\000", stats = {rx_packets = 876, tx_packets = 937, rx_bytes = 53378, tx_bytes = 769633, rx_errors = 0, tx_errors = 0, rx_dropped = 0, tx_dropped = 0, multicast = 0, collisions = 0, rx_length_errors = 0, rx_over_errors = 0, rx_crc_errors = 0, rx_frame_errors = 0, rx_fifo_errors = 0, rx_missed_errors = 0, tx_aborted_errors = 0, tx_carrier_errors = 0, tx_fifo_errors = 0, tx_heartbeat_errors = 0, tx_window_errors = 0, rx_compressed = 0, tx_compressed = 0}, netdev_ops = 0x2c2976d8 <ieee80211_dataif_ops>, ifindex = 0, flags = 4099, state = 1, addr_list_lock = {mutex_id = 0x200a7fac <g_net_dev+128>, mutex = {mutex = {sem = {semcount = 1}, pid = -1, type = 2 '\002', nlocks = 0}}}, dev_addrs = {list = { next = 0x2005d69c <g_heap+37320>, prev = 0x2005d69c <g_heap+37320>}, count = 1}, mc = {list = {next = 0x200a7fc0 <g_net_dev+148>, prev = 0x200a7fc0 <g_net_dev+148>}, count = 0}, mtu = 1500, type = 1, hard_header_len = 14, perm_addr = "\214\336\371_\323g", '\000' <repeats 25 times>, addr_len = 6 '\006', wmm_en = 1 '\001', ieee80211_ptr = 0x200a8288 <g_sub_if_data+8>, dev_addr = "\214\336\371_\323g", broadcast = "\377\377\377\377\377\377", '\000' <repeats 25 times>, _tx = 0x2005d6e8 <g_heap+37396>, num_tx_queues = 4, real_num_tx_queues = 4, tx_queue_len = 1000, is_used = 1 '\001', trans_start = 100568, destructor = 0x238c89 <free_netdev>, priv = 0x200a8280 <g_sub_if_data>, vif_data = 0x200a6558 <g_hw_vif_data>}, { name = "ap0", '\000' <repeats 12 times>, stats = {rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0, rx_errors = 0, tx_errors = 0, rx_dropped = 0, tx_dropped = 0, multicast = 0, collisions = 0, rx_length_errors = 0, rx_over_errors = 0, rx_crc_errors = 0, rx_frame_errors = 0, rx_fifo_errors = 0, rx_missed_errors = 0, tx_aborted_errors = 0, tx_carrier_errors = 0, tx_fifo_errors = 0, tx_heartbeat_errors = 0, tx_window_errors = 0, rx_compressed = 0, tx_compressed = 0}, netdev_ops = 0x2c2976d8 <ieee80211_dataif_ops>, ifindex = 1, flags = 4098, state = 0, addr_list_lock = {mutex_id = 0x200a80c8 <g_net_dev+412>, mutex = {mutex = {sem = {semcount = 1}, pid = -1, type = 2 '\002', nlocks = 0}}}, dev_addrs = {list = { next = 0x20058a84 <g_heap+17840>, prev = 0x20058a84 <g_heap+17840>}, count = 1}, mc = {list = {next = 0x200a80dc <g_net_dev+432>, prev = 0x200a80dc <g_net_dev+432>}, count = 0}, mtu = 1500, type = 1, hard_header_len = 14, perm_addr = "\214\336\371_\323h", '\000' <repeats 25 times>, addr_len = 6 '\006', wmm_en = 1 '\001', ieee80211_ptr = 0x200a8970 <g_sub_if_data+1776>, dev_addr = "\214\336\371_\323h", broadcast = "\377\377\377\377\377\377", '\000' <repeats 25 times>, _tx = 0x20058ad0 <g_heap+17916>, num_tx_queues = 4, real_num_tx_queues = 4, tx_queue_len = 1000, is_used = 1 '\001', trans_start = 0, destructor = 0x238c89 <free_netdev>, priv = 0x200a8968 <g_sub_if_data+1768>, vif_data = 0x200a6df4 <g_hw_vif_data+2204>}, { name = '\000' <repeats 15 times>, stats = {rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0, rx_errors = 0, tx_errors = 0, rx_dropped = 0, tx_dropped = 0, multicast = 0, collisions = 0, rx_length_errors = 0, rx_over_errors = 0, rx_crc_errors = 0, rx_frame_errors = 0, rx_fifo_errors = 0, rx_missed_errors = 0, tx_aborted_errors = 0, tx_carrier_errors = 0, tx_fifo_errors = 0, tx_heartbeat_errors = 0, tx_window_errors = 0, rx_compressed = 0, tx_compressed = 0}, netdev_ops = 0x0, ifindex = 0, flags = 0, state = 0, addr_list_lock = {mutex_id = 0x0, mutex = {mutex = {sem = {semcount = 0}, pid = 0, type = 0 '\000', nlocks = 0}}}, dev_addrs = {list = {next = 0x0, prev = 0x0}, count = 0}, mc = {list = {next = 0x0, prev = 0x0}, count = 0}, mtu = 0, type = 0, hard_header_len = 0, perm_addr = '\000' <repeats 31 times>, addr_len = 0 '\000', wmm_en = 0 '\000', ieee80211_ptr = 0x0, dev_addr = "\000\000\000\000\000", broadcast = '\000' <repeats 31 times>, _tx = 0x0, num_tx_queues = 0, real_num_tx_queues = 0, tx_queue_len = 0, is_used = 0 '\000', trans_start = 0, destructor = 0x0, priv = 0x0, vif_data = 0x0}} ``` ## Impact N/A, new feature ## Testing Generate elf core dump and debug on gdb -- This is an automated message from the Apache Git Service. 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