Re: [OpenOCD-user] beaglebone + gdb segfault

[Paul F. <fer...@gm...>]

Hi Jorge,

You've omitted the mailing list from CC, I assume by mistake, readding
it back; let's keep the communication public so more people would be
able to help you.

And please avoid topposting, I'm really allergic to it.

On Fri, Jun 27, 2014 at 11:33:03PM -0500, Jorge Ventura wrote:
> I didn't understand your last instruction about gdb --args ...,

I mean to fix the segfault itself it's better to have the backtrace of
the openocd itself, so you can start openocd from inside host gdb to
obtain that.

> Debug: 329 6 arm_adi_v5.c:827 ahbap_debugport_init():
> Debug: 330 7 arm_adi_v5.c:938 ahbap_debugport_init(): MEM_AP Packed Transfers: enabled
> Debug: 331 7 arm_adi_v5.c:949 ahbap_debugport_init(): MEM_AP CFG: large data 0 long address 0, big-endian 0
> Debug: 332 7 arm_adi_v5.c:1011 dap_find_ap(): Found APB-AP at AP index: 1 (IDR=0x04770002)
> Debug: 333 7 arm_adi_v5.c:1011 dap_find_ap(): Found AHB-AP at AP index: 0 (IDR=0x14770001)
> Debug: 334 7 adi_v5_jtag.c:271 jtagdp_transaction_endcheck(): jtag-dp: CTRL/STAT error, 0xf0000021
> Debug: 335 7 adi_v5_jtag.c:291 jtagdp_transaction_endcheck(): MEM-AP Cached values: ap_bank 0x10, ap_csw 0xa2000002, ap_tar 0x80001d00
> Error: 336 7 adi_v5_jtag.c:298 jtagdp_transaction_endcheck(): JTAG-DP STICKY ERROR
> Debug: 337 7 adi_v5_jtag.c:315 jtagdp_transaction_endcheck(): jtag-dp: CTRL/STAT 0xf0000001
> Error: 338 7 adi_v5_jtag.c:331 jtagdp_transaction_endcheck(): MEM_AP_CSW 0x800000c2, MEM_AP_TAR 0x80001d00
> Debug: 339 7 openocd.c:147 handle_init_command(): target examination failed

Here is the reason of the later segfault. Target couldn't be examined
and as the result you can't work with it later.

Possible things to try:

1. Lower JTAG clock, 16MHz might be really pushing it, depending on
how exactly you connect the target;

2. Check SRST and TRST signals, your config says you're using them
both, make sure they're properly connected;

3. Write to the devel mailing list (my own opinion is that the user
list should better be merged with the devel; ignoring threads is easy
in any decent MUA).


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