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Hello,
I've been trying to use DS-5 to debug a Linux kernel module on a Pandaboard. The connection to the target goes smoothly, both vmlinux and modex.ko symbol files being loaded.
Unfortunately, when I enter the command "insmod modex.ko" I get the following error:
[ 863.838684] Unhandled prefetch abort: breakpoint debug exception (0x002) at 0xb6f0f930
[ 863.850189] Internal error: : 2 [#2] SMP ARM
[ 863.850189] Modules linked in: arc4 ipv6 wl12xx wlcore mac80211 snd_soc_omap_abe_twl6040 snd_soc_omap_mcpdm snd_soc_omap_mcbsp snd_soc_twl6040 snd_soc_omap snd_soc_core smsc95xx usbnet snd_compress snd_pcm_dmaengine snd_pcm_oss cfg80211 snd_mixer_oss snd_pcm omap2430 musb_hdrc snd_timer ohci_omap3 ehci_omap ehci_hcd udc_core ohci_hcd wlcore_sdio usbcore omapfb cfbfillrect pwm_twl_led cfbimgblt connector_hdmi cfbcopyarea encoder_tpd12s015 encoder_tfp410 pwm_twl connector_dvi rtc_twl snd ti_soc_thermal phy_omap_usb2 omapdss cpufreq_dt usb_common omap4_keypad thermal_sys matrix_keymap omap_wdt emif soundcore leds_gpio led_class hwmon
[ 863.913970] CPU: 1 PID: 857 Comm: insmod Tainted: G D 4.2.0-rc1-g0d518b8 #1
[ 863.913970] Hardware name: Generic OMAP4 (Flattened Device Tree)
[ 863.922485] task: ed190140 ti: ee7d2000 task.ti: ee7d2000
[ 863.922485] PC is at SyS_init_module+0x0/0x134
[ 863.939208] LR is at ret_fast_syscall+0x0/0x54
[ 863.939208] pc : [<c00c4dd4>] lr : [<c000f680>] psr: 80000113
[ 863.939208] sp : ee7d3fa8 ip : 10c5387d fp : 00000000
[ 863.939208] r10: 00000000 r9 : ee7d2000 r8 : c000f864
[ 863.939208] r7 : 00000080 r6 : bee0b968 r5 : 00001698 r4 : 00000002
[ 863.961456] r3 : b6f6a250 r2 : 00013008 r1 : 00001698 r0 : 00013018
[ 863.961456] Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 863.982696] Control: 10c5387d Table: ad35c04a DAC: 00000015
[ 863.982696] Process insmod (pid: 857, stack limit = 0xee7d2218)
[ 863.990570] Stack: (0xee7d3fa8 to 0xee7d4000)
[ 863.998413] 3fa0: 00000002 00001698 00013018 00001698 00013008 b6f6a250
[ 863.998413] 3fc0: 00000002 00001698 bee0b968 00000080 00000003 00004000 b6f98000 00000000
[ 864.016784] 3fe0: 00011f80 bee0b6d8 00008c01 b6f1aae0 00000110 00013018 af7fd821 af7fdc21
[ 864.016784] Code: e58d3018 ebfef1c9 e59d3018 eaffffc1 (e120be70)
[ 864.031951] ---[ end trace f4200d9b4f49b679 ]---
Can anyone help me understand why this is happening and how could I fix it?
Thank you,
Andrei
Thanks for your reply.
I haven't modified the code of modex.c and, yes , DS-5 is attached to my Pandaboard with an SSh connection through which I load the module.
I mention that everything worked when I used the CortexA9 FVP.
Regards,