Hi guys,
I'm trying to use OpenOCD and Flyswatter2 debugger on PandaBoard ES to
debug kernel code.
My procedure:
- start uboot and stop it.
- start openocd and then gdb.
- on gdb:
- target remote localhost:3333
- monitor reset run
- monitor halt (after the U-Boot comes up)
- symbol-file vmlinux
- b start_kernel
- cont
- bootm on uboot side
Up to this point all is fine, the gdb stop the code and show me:
0xc075d720 in start_kernel () at /***/init/main.c:484
484 {
the problem is that:
using stepi I can go step by step but I can not use cont or another
breakpoint, on OpenOCD I have this messages:
MMU: enabled, D-Cache: enabled, I-Cache: enabled
Error: JTAG-DP STICKY ERROR
Error: MEM_AP_CSW 0x2800062, MEM_AP_TAR 0xc075d71c
Error: Failed to read memory at 0xc075d71c
Error: JTAG-DP STICKY ERROR
Error: MEM_AP_CSW 0x2800062, MEM_AP_TAR 0xc075d71c
Error: Failed to read memory at 0xc075d71c
Error: JTAG-DP STICKY ERROR
Error: MEM_AP_CSW 0x2800062, MEM_AP_TAR 0xc075d71c
Error: Failed to read memory at 0xc075d71c
Warn : Invalid ACK 0x7 in JTAG-DP transaction
Polling target omap4460.m31 failed, GDB will be halted. Polling again in
100ms
Warn : Invalid ACK 0x7 in JTAG-DP transaction
Polling target omap4460.cpu failed, GDB will be halted. Polling again in
100ms
Warn : target omap4460.cpu is not halted
Error: Target not halted
Thanks,
Denis
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