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** [tickets:#371] Can't step after hitting a breakpoint. micromips ISA.**
**Status:** new
**Milestone:** 0.10.0
**Created:** Tue Nov 29, 2022 04:36 PM UTC by Nima
**Last Updated:** Tue Nov 29, 2022 04:36 PM UTC
**Owner:** nobody
**Attachments:**
-
[debug.cfg](https://sourceforge.net/p/openocd/tickets/371/attachment/debug.cfg)
(1.1 kB; application/octet-stream)
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[image.dump](https://sourceforge.net/p/openocd/tickets/371/attachment/image.dump)
(3.1 kB; application/octet-stream)
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[openocd_log_d3.txt](https://sourceforge.net/p/openocd/tickets/371/attachment/openocd_log_d3.txt)
(32.8 kB; text/plain)
Hi,
have issues with stepping to next instruction (or continue) when hitting a
break point on micromips architecture with openOCD. It keeps hitting the same
break point and does not go to next instruction.
Here is my setup:
* processor: microaptive mips core pic32mm0256gpm064.
* compiler: mips-mti-elf-gcc
* debugger: mips-gdb
* openOCD version 0.11.0
* dongle: bus blaster v3
I am compiling with -mmicromips option.
Only the 4-wire JTAG pins: TDO, TDI, TMS, TCK are connected and SRST and TRST
are not connected.
So far I am able to bring up openOCD server and connect to it through GDB and
step through the code. However, when adding a hw break point (the only option I
have) I face this issue.
It hits the breakpoint as expected but cannot continue out of it.
Have attached . cfg config file I use for openOCD and verbose openOCD log as
well as my image dump file.
openOCD log
~~~
openocd -f debugger.cfg
Open On-Chip Debugger 0.11.0
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
Info : clock speed 1500 kHz
Info : JTAG tap: pic32mm0256gpm064.cpu tap/device found: 0x4771e053 (mfg: 0x029
(MicrochipTechnology), part: 0x771e, ver: 0x4)
Info : starting gdb server for pic32mm0256gpm064.cpu on 3333
Info : Listening on port 3333 for gdb connections
MICRO MIPS32 only implemented
target halted in MICRO MIPS32 mode due to debug-request, pc: 0xbfc00087
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : accepting 'gdb' connection on tcp/3333
~~~
gdb commands:
~~~
Reading symbols from image.hex...
0xbfc00087 in main () at main.c:17
17 timer++;
(gdb) hbreak toggleLed
Hardware assisted breakpoint 1 at **0xbfc000eb**: file main.c, line 43.
(gdb) c
Continuing.
Breakpoint 1, toggleLed () at main.c:43
43 reg_p = (uint32_t*) 0xBF802EE0;
(gdb) n
Breakpoint 1, toggleLed () at main.c:43
43 reg_p = (uint32_t*) 0xBF802EE0;
(gdb) n
Breakpoint 1, toggleLed () at main.c:43
43 reg_p = (uint32_t*) 0xBF802EE0;
(gdb) n
Breakpoint 1, toggleLed () at main.c:43
43 reg_p = (uint32_t*) 0xBF802EE0;
(gdb)
~~~
It does not come out of break point unless I delete the break point with:
~~~
monitor rbp all
~~~
Also I notice this error when hitting break point
~~~
Error: no breakpoint at address 0xbfc000ea found
~~~
One thing to note is that breakpoint address is **0xbfc000eb** not
**0xbfc000ea** (in the log), I guess LSB should be 1 because of micromips ISA.
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