nmaggioni opened a new pull request, #16886:
URL: https://github.com/apache/nuttx/pull/16886
## Summary
This arch uses code relocation to SRAM through a XIP unit, so forcing
segment permissions manually in the linker script could create unforeseen
issues. A quick fix is setting the `--no-warn-rwx-segments` linker option just
for the incriminated _stage2_ bootloader binary.
This PR goes back to #11462 and adopts the approach seen in #14724.
## Impact
```diff
[...]
CC: src/rp2040_common_bringup.c
CC: src/rp2040_common_initialize.c
CC: src/rp2040_reset.c
IN: arch/arm/src/board/libboard.a -> staging/libboard.a
-/usr/lib/gcc/arm-none-eabi/14.2.0/../../../../arm-none-eabi/bin/ld:
warning: rp2040_boot_stage2.elf has a LOAD segment with RWX permissions
AS: rp2040_boot_stage2.S
CPP:
<path_to_repo>/boards/arm/rp2040/raspberrypi-pico/scripts/raspberrypi-pico-flash.ld->
<path_to_repo>/boards/arm/rp2040/raspberrypi-pico/scripts/raspberrypi-pico-flash.ld.tmp
LD: nuttx
Memory region Used Size Region Size %age Used
flash: 152 KB 2 MB 7.42%
sram: 8768 B 264 KB 3.24%
Generating: nuttx.uf2
Done.
```
## Testing
These changes were tested on a Linux host, targeting a custom RP2040 board
using today's NuttX master as the baseline.
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