arch/xtensa/esp32s3: Fix ROM strdup heap issue in USER_HEAP mode

[461911662]

In ESP32-S3 flat build with USER_HEAP mode, ROM strdup internally calls malloc which may be mapped to a different heap than lib_free, causing cross-heap allocation issues and system crashes.

This commit adds a new Kconfig option ESP32S3_DONT_USE_ROM_LIBC to allow using NuttX libc instead of ROM newlib functions. When USER_HEAP mode is selected, this option is automatically enabled.

Fixes: 60ca804 ("esp32s3: Fix bug related to the PSRAM-allocated task stack")

Reviewed-by: Tiago Medicci Serrano tiago.medicci@espressif.com
Reviewed-by: Almir Okato almir.okato@espressif.com
Reviewed-by: Eren Terzioglu eren.terzioglu@espressif.com

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[cederom]

Thank you @461911662 :-)

[461911662]

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[linguini1]

Could you please fill out the PR template?

[cederom]

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[eren-terzioglu]

Hi,

We were planning to use Nuttx implementation of strdup and strndup functions but disabling all the other functions might causes some issues. We need to check, please do not merge it.

Thanks for your work.

[cederom]

Just to mark waiting for @eren-terzioglu verification and confirmation :-)