Break at address "0x8000B2C" with no debug information

[Duc]

Hi all,

I followed this STM32CubeIDE tutorial to debug an STM32H7S3L8 project running from external flash (OSPI NOR). After flashing and starting the debug session, I get the following error:

Break at address "0x8000B2C" with no debug information available, or outside of program code.

Here is the log from STM32CubeProgrammer:

STMicroelectronics ST-LINK GDB server. Version 7.11.0
Copyright (c) 2025, STMicroelectronics. All rights reserved.

Starting server with the following options:
Persistent Mode : Disabled
Logging Level : 1
Listen Port Number : 61234
Status Refresh Delay : 15s
Verbose Mode : Disabled
SWD Debug : Enabled
InitWhile : Enabled

Waiting for debugger connection...
Debugger connected
Waiting for debugger connection...
Debugger connected
Waiting for debugger connection...
-------------------------------------------------------------------
STM32CubeProgrammer v2.20.0
-------------------------------------------------------------------

Log output file: C:\Users\Admin\AppData\Local\Temp\STM32CubeProgrammer_a10720.log
ST-LINK SN : 004B00273433511737363934
ST-LINK FW : V3J16M9
Board : NUCLEO-H7S3L8
Voltage : 3.29V
SWD freq : 8000 KHz
Connect mode: Under Reset
Reset mode : Hardware reset
Device ID : 0x485
Revision ID : Rev B
Device name : STM32H7RSxx
Flash size : 64 KBytes (default)
Device type : MCU
Device CPU : Cortex-M7
BL Version : 0xE4

Opening and parsing file: ST-LINK_GDB_server_a10720.srec

Memory Programming ...
File : ST-LINK_GDB_server_a10720.srec
Size : 15.16 KB
Address : 0x70000000

Erasing memory corresponding to segment 0:
Erasing external memory sector 0
Download in Progress:

File download complete
Time elapsed during download operation: 00:00:00.404
-------------------------------------------------------------------
STM32CubeProgrammer v2.20.0
-------------------------------------------------------------------

Log output file: C:\Users\Admin\AppData\Local\Temp\STM32CubeProgrammer_a10720.log
ST-LINK SN : 004B00273433511737363934
ST-LINK FW : V3J16M9
Board : NUCLEO-H7S3L8
Voltage : 3.29V
SWD freq : 8000 KHz
Connect mode: Under Reset
Reset mode : Hardware reset
Device ID : 0x485
Revision ID : Rev B
Device name : STM32H7RSxx
Flash size : 64 KBytes (default)
Device type : MCU
Device CPU : Cortex-M7
BL Version : 0xE4

Opening and parsing file: ST-LINK_GDB_server_a10720.srec

Memory Programming ...
File : ST-LINK_GDB_server_a10720.srec
Size : 43.75 KB
Address : 0x08000000

Erasing memory corresponding to segment 0:
Erasing internal memory sectors [0 5]
Download in Progress:

File download complete

My question: Why does the program break at 0x8000B2C after following this tutorial? How can I fix this issue and get debugging working with external flash?

Thanks in advance!

[PhucXDoan]

Just spitting here: it's possible that no debug information is being made.

Does your program work (e.g. blinking LED)?

If so, then see if you can pass a compiler flag so that the compiler puts debug information in the ELF file.

[Duc]

Hi @PhucXDoan ,

No, my program isn’t working. The NUCLEO-H7S3L8 is new to me, and I’m trying to get it set up, but the issue is the first thing that’s blocking me from moving forward with it.

[MHoll.2]

0x08000B2C is in the internal user Flash, so You probably have some problem inside the bootloader (who init's the OSPI Flash).

What happens if You click run?

[Duc · Accepted solution]

Hi @MHoll.2 ,

Enabling the "Load symbols" option has resolved the initial issue.

However, there's a new issue with the code generated by CubeMX. It seems to get stuck at the SCB_EnableDCache() function for a while before jumping to the Error_Handler(void). I suspect there might be a configuration problem with the template code for the NUCLEO-H7S3L8.