From: "François Legal" <devel@thom.fr.eu.org>
To: xenomai@xenomai.org
Subject: Weird page fault while debugging an application using gdbserver
Date: Thu, 07 Nov 2019 16:37:17 +0100 [thread overview]
Message-ID: <b7f-5dc43a00-7b-344a2840@235498125> (raw)
Hello,
I'm porting an existing application to xenomai, and trying to debug it using GDBserver.
I try to set a break to stop at some interesting point in execution. That break is never reached, and each time I get the page fault error with the log copied at the end of the message.
After that, I get the debug feature of the network driver automatically activated.
Starngely enought, the backtrace does not point to my application code, rather in linux kernel/drivers.
The system is an Arm7 Zynq 7000 reference board, being debugged via ethernet.
Running linux 4.4.189 vanilla + corresponding ipipe patch and xenomai 3.0.9
Anybody can help ?
Thanks
François
[ 5481.750121] Unhandled fault: page domain fault (0x01b) at 0x00033238
[ 5481.756485] pgd = 41eac000
[ 5481.759171] [00033238] *pgd=01c9e831, *pte=1f9105df, *ppte=1f910e7e
[ 5481.765435] Internal error: : 1b [#1] PREEMPT SMP ARM
[ 5481.770456] CPU: 0 PID: 745 Comm: Module de Confi Not tainted 4.4.189 #10
[ 5481.777217] Hardware name: Xilinx Zynq Platform
[ 5481.781729] I-pipe domain: Linux
[ 5481.784945] task: 5d892180 ti: 41ef6000 task.ti: 41ef6000
[ 5481.790333] PC is at __und_usr+0x68/0x80
[ 5481.794236] LR is at ipipe_unstall_root+0x30/0xa0
[ 5481.798921] pc : [<40015888>] lr : [<4009bdd4>] psr: 60000013
[ 5481.798921] sp : 41ef7fb0 ip : 41ef7e28 fp : 00000000
[ 5481.810377] r10: 000dd48c r9 : 40015a4c r8 : 18c5387d
[ 5481.815585] r7 : 18c5387d r6 : ffffffff r5 : 60000010 r4 : 00033238
[ 5481.822095] r3 : 60000010 r2 : 0003323c r1 : 00000000 r0 : 00000000
[ 5481.828606] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 5481.835723] Control: 18c5387d Table: 01eac04a DAC: 00000051
[ 5481.841451] Process Module de Confi (pid: 745, stack limit = 0x41ef6220)
[ 5481.848138] Stack: (0x41ef7fb0 to 0x41ef8000)
[ 5481.852480] 7fa0: 00000000 00000000 364884e4 00000000
[ 5481.860643] 7fc0: 00000000 36487e28 3efdebd4 000f0042 36487e2c 00032ea0 000dd48c 36487df4
[ 5481.868802] 7fe0: 36f206cc 36487d18 36f0711c 0003323c 60000010 ffffffff 00000000 00000000
[ 5481.876965] Code: f1080080 e3130020 1a000006 e2424004 (e4b40000)
[ 5481.883043] I-pipe tracer log (100 points):
[ 5481.887191] #func 0 ipipe_trace_panic_freeze+0x10 (oops_enter+0x1c)
[ 5481.895348] #func -2 oops_enter+0x10 (die+0x28)
[ 5481.901684] #func -2 die+0x14 (arm_notify_die+0x2c)
[ 5481.908368] #func -4 arm_notify_die+0x10 (do_DataAbort+0x11c)
[ 5481.915919] #func -5 wake_up_klogd+0x10 (console_unlock+0x338)
[ 5481.923558] #func -6 _raw_spin_unlock_irqrestore+0x10 (console_unlock+0x310)
[ 5481.932411] #func -7 __ipipe_spin_unlock_debug+0x10 (console_unlock+0x300)
[ 5481.941091] #func -8 _raw_spin_lock+0x10 (console_unlock+0x2e4)
[ 5481.948817] #func -8 _raw_spin_unlock_irqrestore+0x10 (up+0x50)
[ 5481.956543] #func -9 __ipipe_spin_unlock_debug+0x10 (up+0x44)
[ 5481.964093] #func -10 ipipe_root_only+0x10 (ipipe_test_and_stall_root+0x18)
[ 5481.972773] #func -11 ipipe_test_and_stall_root+0x10 (_raw_spin_lock_irqsave+0x1c)
[ 5481.982061] #func -12 _raw_spin_lock_irqsave+0x10 (up+0x1c)
[ 5481.989352] #func -13 up+0x10 (console_unlock+0x2d8)
[ 5481.996036] #func -13 _raw_spin_unlock+0x10 (console_unlock+0x2d0)
[ 5482.003935] #func -15 ipipe_root_only+0x10 (ipipe_test_and_stall_root+0x18)
[ 5482.012615] #func -16 ipipe_test_and_stall_root+0x10 (_raw_spin_lock_irqsave+0x1c)
[ 5482.021902] #func -16 _raw_spin_lock_irqsave+0x10 (console_unlock+0xd4)
[ 5482.030235] #func -17 _raw_spin_unlock_irqrestore+0x10 (cdns_uart_console_write+0x144)
[ 5482.039870] #func -18 __ipipe_spin_unlock_debug+0x10 (cdns_uart_console_write+0x138)
[ 5482.049331] #func -19 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.056559] #func -20 arm_heavy_mb+0x10 (cdns_uart_console_write+0x118)
[ 5482.064868] #func -20 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.072073] #func -21 arm_heavy_mb+0x10 (cdns_uart_console_write+0x104)
[ 5482.080446] #func -107 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.087610] #func -108 arm_heavy_mb+0x10 (cdns_uart_console_putchar+0x3c)
[ 5482.096029] #func -144 cdns_uart_console_putchar+0x10 (uart_console_write+0x64)
[ 5482.104970] #func -144 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.112174] #func -145 arm_heavy_mb+0x10 (cdns_uart_console_putchar+0x3c)
[ 5482.120595] #func -146 cdns_uart_console_putchar+0x10 (uart_console_write+0x58)
[ 5482.129534] #func -147 uart_console_write+0x10 (cdns_uart_console_write+0xcc)
[ 5482.138301] #func -148 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.145506] #func -148 arm_heavy_mb+0x10 (cdns_uart_console_write+0xa4)
[ 5482.153751] #func -150 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.160956] #func -150 arm_heavy_mb+0x10 (cdns_uart_console_write+0x8c)
[ 5482.169202] #func -152 ipipe_root_only+0x10 (ipipe_test_and_stall_root+0x18)
[ 5482.177882] #func -152 ipipe_test_and_stall_root+0x10 (_raw_spin_lock_irqsave+0x1c)
[ 5482.187169] #func -153 _raw_spin_lock_irqsave+0x10 (cdns_uart_console_write+0x15c)
[ 5482.196370] #func -154 cdns_uart_console_write+0x14 (call_console_drivers.constprop.13+0x110)
[ 5482.206526] #func -155 call_console_drivers.constprop.13+0x10 (console_unlock+0x288)
[ 5482.215901] #func -156 _raw_spin_unlock+0x10 (console_unlock+0x270)
[ 5482.223799] #func -157 ipipe_root_only+0x10 (ipipe_test_and_stall_root+0x18)
[ 5482.232479] #func -158 ipipe_test_and_stall_root+0x10 (_raw_spin_lock_irqsave+0x1c)
[ 5482.241767] #func -159 _raw_spin_lock_irqsave+0x10 (console_unlock+0x54)
[ 5482.250101] #func -159 console_unlock+0x14 (vprintk_emit+0x350)
[ 5482.257652] #func -160 _raw_spin_unlock_irqrestore+0x10 (down_trylock+0x3c)
[ 5482.266244] #func -161 __ipipe_spin_unlock_debug+0x10 (down_trylock+0x30)
[ 5482.274664] #func -162 ipipe_root_only+0x10 (ipipe_test_and_stall_root+0x18)
[ 5482.283344] #func -163 ipipe_test_and_stall_root+0x10 (_raw_spin_lock_irqsave+0x1c)
[ 5482.292631] #func -164 _raw_spin_lock_irqsave+0x10 (down_trylock+0x1c)
[ 5482.300791] #func -165 down_trylock+0x10 (console_trylock+0x1c)
[ 5482.308342] #func -165 console_trylock+0x10 (vprintk_emit+0x314)
[ 5482.315982] #func -166 _raw_spin_unlock+0x10 (vprintk_emit+0x2b4)
[ 5482.323706] #func -168 log_make_free_space+0x14 (log_store+0x50)
[ 5482.331344] #func -169 log_store+0x14 (cont_flush.part.2+0xb4)
[ 5482.338809] #func -170 cont_flush.part.2+0x14 (vprintk_emit+0x3f4)
[ 5482.346621] #func -171 cont_add+0x14 (vprintk_emit+0x3d0)
[ 5482.353660] #func -172 _raw_spin_lock+0x10 (vprintk_emit+0x184)
[ 5482.361213] #func -174 ipipe_root_only+0x10 (ipipe_test_and_stall_root+0x18)
[ 5482.369892] #func -174 ipipe_test_and_stall_root+0x10 (vprintk_emit+0x150)
[ 5482.378399] #func -175 vprintk_emit+0x14 (vprintk_default+0x34)
[ 5482.385950] #func -176 vprintk_default+0x14 (printk+0x1e0)
[ 5482.393068] #func -177 printk+0x18 (show_pte+0xe8)
[ 5482.399491] #func -179 _raw_spin_unlock_irqrestore+0x10 (console_unlock+0x310)
[ 5482.408345] #func -179 __ipipe_spin_unlock_debug+0x10 (console_unlock+0x300)
[ 5482.417025] #func -180 _raw_spin_lock+0x10 (console_unlock+0x2e4)
[ 5482.424750] #func -181 _raw_spin_unlock_irqrestore+0x10 (up+0x50)
[ 5482.432475] #func -182 __ipipe_spin_unlock_debug+0x10 (up+0x44)
[ 5482.440026] #func -183 ipipe_root_only+0x10 (ipipe_test_and_stall_root+0x18)
[ 5482.448707] #func -184 ipipe_test_and_stall_root+0x10 (_raw_spin_lock_irqsave+0x1c)
[ 5482.457995] #func -185 _raw_spin_lock_irqsave+0x10 (up+0x1c)
[ 5482.465285] #func -185 up+0x10 (console_unlock+0x2d8)
[ 5482.471969] #func -186 _raw_spin_unlock+0x10 (console_unlock+0x2d0)
[ 5482.479867] #func -188 ipipe_root_only+0x10 (ipipe_test_and_stall_root+0x18)
[ 5482.488548] #func -189 ipipe_test_and_stall_root+0x10 (_raw_spin_lock_irqsave+0x1c)
[ 5482.497836] #func -189 _raw_spin_lock_irqsave+0x10 (console_unlock+0xd4)
[ 5482.506168] #func -191 _raw_spin_unlock_irqrestore+0x10 (cdns_uart_console_write+0x144)
[ 5482.515803] #func -191 __ipipe_spin_unlock_debug+0x10 (cdns_uart_console_write+0x138)
[ 5482.525264] #func -192 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.532469] #func -193 arm_heavy_mb+0x10 (cdns_uart_console_write+0x118)
[ 5482.540801] #func -194 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.548006] #func -194 arm_heavy_mb+0x10 (cdns_uart_console_write+0x104)
[ 5482.556338] #func -280 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.563543] #func -281 arm_heavy_mb+0x10 (cdns_uart_console_putchar+0x3c)
[ 5482.571963] #func -366 cdns_uart_console_putchar+0x10 (uart_console_write+0x38)
[ 5482.580903] #func -367 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.588108] #func -368 arm_heavy_mb+0x10 (cdns_uart_console_putchar+0x3c)
[ 5482.596528] #func -453 cdns_uart_console_putchar+0x10 (uart_console_write+0x38)
[ 5482.605467] #func -454 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.612672] #func -454 arm_heavy_mb+0x10 (cdns_uart_console_putchar+0x3c)
[ 5482.621091] #func -539 cdns_uart_console_putchar+0x10 (uart_console_write+0x38)
[ 5482.630032] #func -540 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.637237] #func -541 arm_heavy_mb+0x10 (cdns_uart_console_putchar+0x3c)
[ 5482.645655] #func -545 cdns_uart_console_putchar+0x10 (uart_console_write+0x38)
[ 5482.654596] #func -546 l2c210_sync+0x10 (arm_heavy_mb+0x2c)
[ 5482.661802] #func -547 arm_heavy_mb+0x10 (cdns_uart_console_putchar+0x3c)
[ 5482.670220] | #func -548 __ipipe_bugon_irqs_enabled+0x10 (__ipipe_fast_svc_irq_exit+0x4)
[ 5482.679768] | #func -549 ipipe_test_root+0x10 (__ipipe_check_root_interruptible+0x5c)
[ 5482.689056] | #func -550 __ipipe_check_root_interruptible+0x10 (__irq_svc+0x58)
[ 5482.697824] | #func -551 __ipipe_do_sync_pipeline+0x14 (dispatch_irq_head+0x184)
[ 5482.706694] ---[ end trace b591dcdb6dbe58ba ]---
next reply other threads:[~2019-11-07 15:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-07 15:37 François Legal [this message]
2019-11-07 15:54 ` Weird page fault while debugging an application using gdbserver Philippe Gerum
2019-11-07 17:03 ` François Legal
2019-11-08 9:05 ` Philippe Gerum
2019-11-08 9:22 ` Jan Kiszka
2019-11-12 10:52 ` Philippe Gerum
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