Hi
I’m building using mbed cli and it builds ok. I can deploy using OpenOCD but with no RTX5 RTOS support, it won’t debug. If I try and debug using pyOCD it throws an exception. I have opened a report there and it has been assigned as a bug, but the question is why is the mbed build producing an ELF file that is unusable by pyOCD?
My development path to date has been:
Build in Mbed CLI and debug using VSCode/OpenOCD. This failed because no RTOS support.
Switched to Mbed Studio expecting it to ‘just work’, but it builds but won’t deploy via pyOCD.
Switched back to Mbed CLI with VSCode/pyOCD but fails to deploy too due to errors below. I’ve moved back to Mbed CLI because I couldn’t get GCC builds working with Mbed Studio (here) and I needed to switch to GCC because the pyOCD owner suggested it produces more complete ELF file headers. But now I’m building with GCC, that still doesn’t work.
GDB says there is an overlapping region - is this is the issue and if so, what is overlapping in the following?
arm-mbed.elf: file format elf32-littlearm
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 0000d688 08000000 08000000 000000c0 2**6
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .ARM.exidx 00000008 0800d688 0800d688 0000d748 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
2 .data 00000a10 200001c0 0800d690 0000d750 2**3
CONTENTS, ALLOC, LOAD, DATA
3 .bss 000027e0 20000bd0 0800e0a0 0000e160 2**3
ALLOC
4 .heap 0009c850 200033b0 200033b0 0000e160 2**0
CONTENTS
5 .ARM.attributes 0000002e 00000000 00000000 000aa9b0 2**0
CONTENTS, READONLY
6 .comment 0000004c 00000000 00000000 000aa9de 2**0
CONTENTS, READONLY
7 .debug_info 000fd1a7 00000000 00000000 000aaa2a 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
8 .debug_abbrev 0001a8d4 00000000 00000000 001a7bd1 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
9 .debug_aranges 000035e0 00000000 00000000 001c24a8 2**3
CONTENTS, READONLY, DEBUGGING, OCTETS
10 .debug_line 0003bbd5 00000000 00000000 001c5a88 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
11 .debug_str 00030f13 00000000 00000000 0020165d 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
12 .debug_ranges 00006e58 00000000 00000000 00232570 2**3
CONTENTS, READONLY, DEBUGGING, OCTETS
13 .debug_frame 0000a250 00000000 00000000 002393c8 2**2
CONTENTS, READONLY, DEBUGGING, OCTETS
14 .debug_loc 00033183 00000000 00000000 00243618 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
15 .stabstr 00000076 00000000 00000000 0027679b 2**0
CONTENTS, READONLY, DEBUGGING
arm-mbed.elf: file format elf32-littlearm
Program Header:
0x70000001 off 0x0000d748 vaddr 0x0800d688 paddr 0x0800d688 align 2**2
filesz 0x00000008 memsz 0x00000008 flags r--
LOAD off 0x000000c0 vaddr 0x08000000 paddr 0x08000000 align 2**6
filesz 0x0000d690 memsz 0x0000d690 flags r-x
LOAD off 0x0000d750 vaddr 0x200001c0 paddr 0x0800d690 align 2**3
filesz 0x00000a10 memsz 0x000031f0 flags rw-
private flags = 5000200: [Version5 EABI] [soft-float ABI]
0000000449: GDB -> App: {"outOfBandRecord":[{"isStream":true,"type":"log","content":"warning: Overlapping regions in memory map: ignoring\n"}]}
0000000449: warning: Overlapping regions in memory map: ignoring
0000000544: GDB -> App: {"outOfBandRecord":[{"isStream":true,"type":"console","content":"0x0800c74c in ?? ()\n"}]}
>>> gdbserver start
>>> 0457795:ERROR:gdbserver:Unhandled exception in handle_message: individual memory accesses must not cross memory region boundaries
Traceback (most recent call last):
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 549, in handle_message
reply = handler(msg[msgStart:])
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 1023, in handle_query
resp = self.handle_query_xml(b'threads', int(data[0], 16), int(data[1].split(b'#')[0], 16))
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 1210, in handle_query_xml
xml = self.get_threads_xml()
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 1300, in get_threads_xml
if not self.is_threading_enabled():
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 1320, in is_threading_enabled
return (self.thread_provider is not None) and self.thread_provider.is_enabled \
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\rtos\rtx5.py", line 408, in is_enabled
return self.get_kernel_state() != 0 and not self._target.in_thread_mode_on_main_stack()
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\rtos\rtx5.py", line 446, in get_kernel_state
return self._target_context.read8(self._os_rtx_info + RTX5ThreadProvider.KERNEL_STATE_OFFSET)
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\core\memory_interface.py", line 64, in read8
return self.read_memory(addr, 8, now)
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\debug\cache.py", line 516, in read_memory
return self._memcache.read_memory(addr, transfer_size, now)
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\debug\cache.py", line 422, in read_memory
data = self.read_memory_block8(addr, 1)[0]
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\debug\cache.py", line 442, in read_memory_block8
if not self._check_regions(addr, size):
File "C:\Users\User\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\debug\cache.py", line 414, in _check_regions
raise MemoryAccessError("individual memory accesses must not cross memory region boundaries")
pyocd.debug.cache.MemoryAccessError: individual memory accesses must not cross memory region boundaries
The addresses appear to be sequential blocks. Totally stuck in that code builds, even runs, but cannot debug.
Many thanks!
