Hi Tarek, I'm sure that any change in the config script cannot fix the problem (if we keep using maskisr auto and CTI at all). See target/cortex_m.c:1013, where an internal dummy run is started and couple of lines further the code waits for halt on breakpoint, both without emitting any event.
Tom On 04/02/2021 22:41, Tarek BOUCHKATI wrote:
Hi Tom, I will be able to play with an STM32H7 b/o next week, I will try to investigate further. In STM32CubeIDE we changed a lot the config files, the way I have lost the track. FTR, adding CTI in config files was the fast way. The correct one is to do it like in aarch64. I was into it, but you know, when you have a 99% working solution you just get lazy. Checking closer in st_scripts/targets/stm32h7x.cfg I was using the 'resume-start' and 'halted' events to do the stm32h7x_cti_prepare_restart. Could you please check if this works for you. If so, let's fix it upstream. Tarek -----Original Message----- From: Tomas Vanek via OpenOCD-devel <openocd-devel@lists.sourceforge.net> Sent: Wednesday, February 3, 2021 7:10 PM To: Tarek BOCHKATI <tarekbouchk...@gmail.com> Cc: OpenOCD ML <openocd-devel@lists.sourceforge.net> Subject: [OpenOCD-devel] STM32H7 stepping broken by CTI Hi Tarek, I encountered a problem debugging STM32H745 with "set USE_CTI 1". The step command didn't work, PC didn't advance. I found out that the problem depends on setting "cortex_m maskisr auto", it disappears with other maskisr modes. Well it seems clear: In the maskisr auto mode a dummy run to breakpoint at PC address is issued first. It sets CTI signals and later issued C_STEP is therefore suppressed. We would need a stm32h7x_cti_prepare_restart call in between but there is no suitable event emitted. Tom _______________________________________________ OpenOCD-devel mailing list OpenOCD-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openocd-devel
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